From 51ed7c7191aa895afa4ddeada459fcff8f6d292f Mon Sep 17 00:00:00 2001
From: Stephan Vedder <stephan.vedder@gmail.com>
Date: Thu, 6 Dec 2018 23:40:20 +0100
Subject: [PATCH 001/223] Start work on jpeg 12 bit support

---
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs         | 10 +++++-----
 .../Formats/Jpg/JpegDecoderTests.Images.cs             |  5 ++++-
 tests/ImageSharp.Tests/TestImages.cs                   |  4 +++-
 tests/Images/Input/Jpg/baseline/testorig12.jpg         |  3 +++
 4 files changed, 15 insertions(+), 7 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/baseline/testorig12.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index f6da9cb2ec..5bfe88cc63 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// The only supported precision
         /// </summary>
-        public const int SupportedPrecision = 8;
+        public readonly int[] SupportedPrecisions = { 8, 12 };
 
         /// <summary>
         /// The global configuration
@@ -137,7 +137,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// Gets the color depth, in number of bits per pixel.
         /// </summary>
-        public int BitsPerPixel => this.ComponentCount * SupportedPrecision;
+        public int BitsPerPixel => this.ComponentCount * this.Frame.Precision;
 
         /// <summary>
         /// Gets the input stream.
@@ -720,10 +720,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
             this.InputStream.Read(this.temp, 0, remaining);
 
-            // We only support 8-bit precision.
-            if (this.temp[0] != SupportedPrecision)
+            // We only support 8-bit and 12-bit precision.
+            if (!SupportedPrecisions.Contains(this.temp[0]))
             {
-                throw new ImageFormatException("Only 8-Bit precision supported.");
+                throw new ImageFormatException("Only 8-Bit and 12-Bit precision supported.");
             }
 
             this.Frame = new JpegFrame
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 40de25b30a..03f1826edd 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -28,7 +28,10 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Issues.ExifResizeOutOfRange696,
                 TestImages.Jpeg.Issues.InvalidAPP0721,
                 TestImages.Jpeg.Issues.ExifGetString750Load,
-                TestImages.Jpeg.Issues.ExifGetString750Transform
+                TestImages.Jpeg.Issues.ExifGetString750Transform,
+
+                // High depth images
+                TestImages.Jpeg.Baseline.Testorig12bit,
             };
 
         public static string[] ProgressiveTestJpegs =
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 1144a3f7c0..46f9459c52 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -135,12 +135,14 @@ namespace SixLabors.ImageSharp.Tests
                 public const string Testorig420 = "Jpg/baseline/testorig.jpg";
                 public const string MultiScanBaselineCMYK = "Jpg/baseline/MultiScanBaselineCMYK.jpg";
                 public const string Ratio1x1 = "Jpg/baseline/ratio-1x1.jpg";
+                public const string Testorig12bit = "Jpg/baseline/testorig12.jpg";
 
                 public static readonly string[] All =
                 {
                     Cmyk, Ycck, Exif, Floorplan,
                     Calliphora, Turtle, GammaDalaiLamaGray,
-                    Hiyamugi, Jpeg400, Jpeg420Exif, Jpeg444, Ratio1x1
+                    Hiyamugi, Jpeg400, Jpeg420Exif, Jpeg444,
+                    Ratio1x1, Testorig12bit
                 };
             }
 
diff --git a/tests/Images/Input/Jpg/baseline/testorig12.jpg b/tests/Images/Input/Jpg/baseline/testorig12.jpg
new file mode 100644
index 0000000000..5cc7a0ada2
--- /dev/null
+++ b/tests/Images/Input/Jpg/baseline/testorig12.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:34790770f76db8e60a7765b52ca4edf5f16bc21bcb8c6045ca2efef39a8a013e
+size 12394

From 84aef78c1e758f40a08e869cf05f1f5aad26f03d Mon Sep 17 00:00:00 2001
From: Stephan Vedder <stephan.vedder@gmail.com>
Date: Sun, 9 Dec 2018 12:26:17 +0100
Subject: [PATCH 002/223] Work on 12-bit support

---
 src/ImageSharp/Common/Tuples/Vector4Pair.cs   | 16 +++----
 .../Jpeg/Components/Block8x8F.Generated.cs    | 18 ++++----
 .../Jpeg/Components/Block8x8F.Generated.tt    | 18 ++++----
 .../Formats/Jpeg/Components/Block8x8F.cs      |  8 ++--
 .../JpegColorConverter.FromCmyk.cs            | 11 +++--
 .../JpegColorConverter.FromGrayScale.cs       |  9 ++--
 .../JpegColorConverter.FromRgb.cs             |  9 ++--
 .../JpegColorConverter.FromYCbCrBasic.cs      |  4 +-
 .../JpegColorConverter.FromYCbCrSimd.cs       | 26 ++++++------
 .../JpegColorConverter.FromYCbCrSimdAvx2.cs   |  4 +-
 .../JpegColorConverter.FromYccK.cs            | 21 ++++++----
 .../ColorConverters/JpegColorConverter.cs     | 42 ++++++++++++++++---
 .../Jpeg/Components/Decoder/IRawJpegData.cs   |  5 +++
 .../Decoder/JpegBlockPostProcessor.cs         | 12 +++++-
 .../Decoder/JpegComponentPostProcessor.cs     |  3 +-
 .../Decoder/JpegImagePostProcessor.cs         |  2 +-
 .../Formats/Jpeg/JpegDecoderCore.cs           |  7 +++-
 .../Formats/Jpg/Block8x8FTests.cs             |  6 +--
 .../Formats/Jpg/JpegColorConverterTests.cs    | 20 ++++-----
 19 files changed, 151 insertions(+), 90 deletions(-)

diff --git a/src/ImageSharp/Common/Tuples/Vector4Pair.cs b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
index cae283d628..2a42160d65 100644
--- a/src/ImageSharp/Common/Tuples/Vector4Pair.cs
+++ b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
@@ -37,12 +37,12 @@ namespace SixLabors.ImageSharp.Tuples
             this.B += other.B;
         }
 
-        /// <summary>
-        /// Downscale method, specific to Jpeg color conversion. Works only if Vector{float}.Count == 4!
+        /// <summary>. Works only if Ve
+        /// Downscale method, specific to Jpeg color conversctor{float}.Count == 4!
         /// TODO: Move it somewhere else.
         /// </summary>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void RoundAndDownscalePreAvx2()
+        internal void RoundAndDownscalePreAvx2(float downscaleFactor)
         {
             ref Vector<float> a = ref Unsafe.As<Vector4, Vector<float>>(ref this.A);
             a = a.FastRound();
@@ -50,8 +50,8 @@ namespace SixLabors.ImageSharp.Tuples
             ref Vector<float> b = ref Unsafe.As<Vector4, Vector<float>>(ref this.B);
             b = b.FastRound();
 
-            // Downscale by 1/255
-            var scale = new Vector4(1 / 255f);
+            // Downscale by 1/factor
+            var scale = new Vector4(1 / downscaleFactor);
             this.A *= scale;
             this.B *= scale;
         }
@@ -61,14 +61,14 @@ namespace SixLabors.ImageSharp.Tuples
         /// TODO: Move it somewhere else.
         /// </summary>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void RoundAndDownscaleAvx2()
+        internal void RoundAndDownscaleAvx2(float downscaleFactor)
         {
             ref Vector<float> self = ref Unsafe.As<Vector4Pair, Vector<float>>(ref this);
             Vector<float> v = self;
             v = v.FastRound();
 
-            // Downscale by 1/255
-            v *= new Vector<float>(1 / 255f);
+            // Downscale by 1/factor
+            v *= new Vector<float>(1 / downscaleFactor);
             self = v;
         }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
index 09ed6408d7..15fbb83d96 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
@@ -9,10 +9,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
 {
 	internal partial struct Block8x8F
     {
-        private static readonly Vector4 CMin4 = new Vector4(0F);
-        private static readonly Vector4 CMax4 = new Vector4(255F);
-        private static readonly Vector4 COff4 = new Vector4(128F);
-
 		/// <summary>
         /// Transpose the block into the destination block.
         /// </summary>
@@ -94,10 +90,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
 		/// <summary>
-        /// Level shift by +128, clip to [0, 255]
+        /// Level shift by +maximum/2, clip to [0, maximum]
         /// </summary>
-        public void NormalizeColorsInplace()
+        public void NormalizeColorsInplace(float maximum)
         {
+            Vector4 CMin4 = new Vector4(0F);
+            Vector4 CMax4 = new Vector4(maximum);
+            Vector4 COff4 = new Vector4(maximum/2 + 1);
+
             this.V0L = Vector4.Clamp(this.V0L + COff4, CMin4, CMax4);
             this.V0R = Vector4.Clamp(this.V0R + COff4, CMin4, CMax4);
             this.V1L = Vector4.Clamp(this.V1L + COff4, CMin4, CMax4);
@@ -120,10 +120,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// AVX2-only variant for executing <see cref="NormalizeColorsInplace"/> and <see cref="RoundInplace"/> in one step.
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void NormalizeColorsAndRoundInplaceAvx2()
+        public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>(128f);
-            Vector<float> max = new Vector<float>(255F);
+            Vector<float> off = new Vector<float>(maximum/2 +1);
+            Vector<float> max = new Vector<float>(maximum);
             
             ref Vector<float> row0 = ref Unsafe.As<Vector4, Vector<float>>(ref this.V0L);
             row0 = NormalizeAndRound(row0, off, max);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
index f93ee6522d..431ba86b03 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
@@ -22,10 +22,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
 {
 	internal partial struct Block8x8F
     {
-        private static readonly Vector4 CMin4 = new Vector4(0F);
-        private static readonly Vector4 CMax4 = new Vector4(255F);
-        private static readonly Vector4 COff4 = new Vector4(128F);
-
 		/// <summary>
         /// Transpose the block into the destination block.
         /// </summary>
@@ -59,10 +55,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
 		/// <summary>
-        /// Level shift by +128, clip to [0, 255]
+        /// Level shift by +maximum/2, clip to [0, maximum]
         /// </summary>
-        public void NormalizeColorsInplace()
+        public void NormalizeColorsInplace(float maximum)
         {
+            Vector4 CMin4 = new Vector4(0F);
+            Vector4 CMax4 = new Vector4(maximum);
+            Vector4 COff4 = new Vector4(maximum/2 + 1);
+
             <#
 
 			PushIndent("            ");
@@ -83,10 +83,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// AVX2-only variant for executing <see cref="NormalizeColorsInplace"/> and <see cref="RoundInplace"/> in one step.
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void NormalizeColorsAndRoundInplaceAvx2()
+        public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>(128f);
-            Vector<float> max = new Vector<float>(255F);
+            Vector<float> off = new Vector<float>(maximum/2 +1);
+            Vector<float> max = new Vector<float>(maximum);
             <#
 
             for (int i = 0; i < 8; i++)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
index 81393342d6..c9c886f057 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
@@ -467,17 +467,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Level shift by +128, clip to [0..255], and round all the values in the block.
+        /// Level shift by +maximum/2, clip to [0..maximum], and round all the values in the block.
         /// </summary>
-        public void NormalizeColorsAndRoundInplace()
+        public void NormalizeColorsAndRoundInplace(float maximum)
         {
             if (SimdUtils.IsAvx2CompatibleArchitecture)
             {
-                this.NormalizeColorsAndRoundInplaceAvx2();
+                this.NormalizeColorsAndRoundInplaceAvx2(maximum);
             }
             else
             {
-                this.NormalizeColorsInplace();
+                this.NormalizeColorsInplace(maximum);
                 this.RoundInplace();
             }
         }
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
index 7a14d072e6..28f0000195 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
@@ -10,8 +10,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromCmyk : JpegColorConverter
         {
-            public FromCmyk()
-                : base(JpegColorSpace.Cmyk)
+            public FromCmyk(int precision)
+                : base(JpegColorSpace.Cmyk, precision)
             {
             }
 
@@ -25,14 +25,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1F);
 
-                var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
+                var scale = new Vector4(1 / this.MaximumValue, 
+                                        1 / this.MaximumValue, 
+                                        1 / this.MaximumValue, 
+                                        1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
                     float c = cVals[i];
                     float m = mVals[i];
                     float y = yVals[i];
-                    float k = kVals[i] / 255F;
+                    float k = kVals[i] / this.MaximumValue;
 
                     v.X = c * k;
                     v.Y = m * k;
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
index 7424145c3b..36bd6fca99 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
@@ -12,14 +12,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromGrayscale : JpegColorConverter
         {
-            public FromGrayscale()
-                : base(JpegColorSpace.Grayscale)
+            public FromGrayscale(int precision)
+                : base(JpegColorSpace.Grayscale, precision)
             {
             }
 
             public override void ConvertToRgba(in ComponentValues values, Span<Vector4> result)
             {
-                var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
+                var scale = new Vector4(1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1F);
 
                 ref float sBase = ref MemoryMarshal.GetReference(values.Component0);
                 ref Vector4 dBase = ref MemoryMarshal.GetReference(result);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
index 7cd97c4140..13eec7aad1 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
@@ -10,8 +10,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromRgb : JpegColorConverter
         {
-            public FromRgb()
-                : base(JpegColorSpace.RGB)
+            public FromRgb(int precision)
+                : base(JpegColorSpace.RGB, precision)
             {
             }
 
@@ -24,7 +24,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1);
 
-                var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
+                var scale = new Vector4(1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
index cb71889bc5..2cab95ff09 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
@@ -10,8 +10,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromYCbCrBasic : JpegColorConverter
         {
-            public FromYCbCrBasic()
-                : base(JpegColorSpace.YCbCr)
+            public FromYCbCrBasic(int precision)
+                : base(JpegColorSpace.YCbCr, precision)
             {
             }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
index 23aa1acbe6..1047957100 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
@@ -14,8 +14,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromYCbCrSimd : JpegColorConverter
         {
-            public FromYCbCrSimd()
-                : base(JpegColorSpace.YCbCr)
+            public FromYCbCrSimd(int precision)
+                : base(JpegColorSpace.YCbCr, precision)
             {
             }
 
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 int simdCount = result.Length - remainder;
                 if (simdCount > 0)
                 {
-                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount));
+                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), this.MaximumValue, this.HalfValue);
                 }
 
                 FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder));
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
             /// <summary>
             /// SIMD convert using buffers of sizes divisible by 8.
             /// </summary>
-            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result)
+            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result, float maxValue, float halfValue)
             {
                 DebugGuard.IsTrue(result.Length % 8 == 0, nameof(result), "result.Length should be divisible by 8!");
 
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 ref Vector4Octet resultBase =
                     ref Unsafe.As<Vector4, Vector4Octet>(ref MemoryMarshal.GetReference(result));
 
-                var chromaOffset = new Vector4(-128f);
+                var chromaOffset = new Vector4(-halfValue);
 
                 // Walking 8 elements at one step:
                 int n = result.Length / 8;
@@ -58,11 +58,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                     // y = yVals[i];
                     Vector4Pair y = Unsafe.Add(ref yBase, i);
 
-                    // cb = cbVals[i] - 128F;
+                    // cb = cbVals[i] - halfValue);
                     Vector4Pair cb = Unsafe.Add(ref cbBase, i);
                     cb.AddInplace(chromaOffset);
 
-                    // cr = crVals[i] - 128F;
+                    // cr = crVals[i] - halfValue;
                     Vector4Pair cr = Unsafe.Add(ref crBase, i);
                     cr.AddInplace(chromaOffset);
 
@@ -90,15 +90,15 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                     if (Vector<float>.Count == 4)
                     {
                         // TODO: Find a way to properly run & test this path on AVX2 PC-s! (Have I already mentioned that Vector<T> is terrible?)
-                        r.RoundAndDownscalePreAvx2();
-                        g.RoundAndDownscalePreAvx2();
-                        b.RoundAndDownscalePreAvx2();
+                        r.RoundAndDownscalePreAvx2(maxValue);
+                        g.RoundAndDownscalePreAvx2(maxValue);
+                        b.RoundAndDownscalePreAvx2(maxValue);
                     }
                     else if (SimdUtils.IsAvx2CompatibleArchitecture)
                     {
-                        r.RoundAndDownscaleAvx2();
-                        g.RoundAndDownscaleAvx2();
-                        b.RoundAndDownscaleAvx2();
+                        r.RoundAndDownscaleAvx2(maxValue);
+                        g.RoundAndDownscaleAvx2(maxValue);
+                        b.RoundAndDownscaleAvx2(maxValue);
                     }
                     else
                     {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
index f0a70a6f38..4696959950 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
@@ -15,8 +15,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromYCbCrSimdAvx2 : JpegColorConverter
         {
-            public FromYCbCrSimdAvx2()
-                : base(JpegColorSpace.YCbCr)
+            public FromYCbCrSimdAvx2(int precision)
+                : base(JpegColorSpace.YCbCr, precision)
             {
             }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
index 6f940f62f9..d4e1510156 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
@@ -10,8 +10,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
     {
         internal class FromYccK : JpegColorConverter
         {
-            public FromYccK()
-                : base(JpegColorSpace.Ycck)
+            public FromYccK(int precision)
+                : base(JpegColorSpace.Ycck, precision)
             {
             }
 
@@ -25,18 +25,21 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1F);
 
-                var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
+                var scale = new Vector4(1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1 / this.MaximumValue,
+                                        1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
                     float y = yVals[i];
-                    float cb = cbVals[i] - 128F;
-                    float cr = crVals[i] - 128F;
-                    float k = kVals[i] / 255F;
+                    float cb = cbVals[i] - this.HalfValue;
+                    float cr = crVals[i] - this.HalfValue;
+                    float k = kVals[i] / this.MaximumValue;
 
-                    v.X = (255F - MathF.Round(y + (1.402F * cr), MidpointRounding.AwayFromZero)) * k;
-                    v.Y = (255F - MathF.Round(y - (0.344136F * cb) - (0.714136F * cr), MidpointRounding.AwayFromZero)) * k;
-                    v.Z = (255F - MathF.Round(y + (1.772F * cb), MidpointRounding.AwayFromZero)) * k;
+                    v.X = (this.MaximumValue - MathF.Round(y + (1.402F * cr), MidpointRounding.AwayFromZero)) * k;
+                    v.Y = (this.MaximumValue - MathF.Round(y - (0.344136F * cb) - (0.714136F * cr), MidpointRounding.AwayFromZero)) * k;
+                    v.Z = (this.MaximumValue - MathF.Round(y + (1.772F * cb), MidpointRounding.AwayFromZero)) * k;
                     v.W = 1F;
 
                     v *= scale;
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
index a44ebf89d1..30dbdc8964 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
@@ -22,15 +22,29 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         /// </summary>
         private static readonly JpegColorConverter[] Converters =
             {
-                GetYCbCrConverter(), new FromYccK(), new FromCmyk(), new FromGrayscale(), new FromRgb()
+                // 8-bit converters
+                GetYCbCrConverter(8),
+                new FromYccK(8),
+                new FromCmyk(8),
+                new FromGrayscale(8),
+                new FromRgb(8),
+                // 12-bit converters
+                GetYCbCrConverter(12),
+                new FromYccK(12),
+                new FromCmyk(12),
+                new FromGrayscale(12),
+                new FromRgb(12),
             };
 
         /// <summary>
         /// Initializes a new instance of the <see cref="JpegColorConverter"/> class.
         /// </summary>
-        protected JpegColorConverter(JpegColorSpace colorSpace)
+        protected JpegColorConverter(JpegColorSpace colorSpace, int precision)
         {
             this.ColorSpace = colorSpace;
+            this.Precision = precision;
+            this.MaximumValue = (float)Math.Pow(2, precision) - 1;
+            this.HalfValue = (float)Math.Ceiling(this.MaximumValue / 2);
         }
 
         /// <summary>
@@ -38,12 +52,28 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         /// </summary>
         public JpegColorSpace ColorSpace { get; }
 
+        /// <summary>
+        /// Gets the Precision of this converter in bits.
+        /// </summary>
+        public int Precision { get; }
+
+        /// <summary>
+        /// Gets the maximum value of a sample
+        /// </summary>
+        private float MaximumValue { get; }
+
+        /// <summary>
+        /// Gets the maximum value of a sample
+        /// </summary>
+        private float HalfValue { get; }
+
         /// <summary>
         /// Returns the <see cref="JpegColorConverter"/> corresponding to the given <see cref="JpegColorSpace"/>
         /// </summary>
-        public static JpegColorConverter GetConverter(JpegColorSpace colorSpace)
+        public static JpegColorConverter GetConverter(JpegColorSpace colorSpace, float precision)
         {
-            JpegColorConverter converter = Converters.FirstOrDefault(c => c.ColorSpace == colorSpace);
+            JpegColorConverter converter = Converters.FirstOrDefault(c => c.ColorSpace == colorSpace &&
+                                                                          c.Precision == precision);
 
             if (converter is null)
             {
@@ -63,8 +93,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         /// <summary>
         /// Returns the <see cref="JpegColorConverter"/> for the YCbCr colorspace that matches the current CPU architecture.
         /// </summary>
-        private static JpegColorConverter GetYCbCrConverter() =>
-            FromYCbCrSimdAvx2.IsAvailable ? (JpegColorConverter)new FromYCbCrSimdAvx2() : new FromYCbCrSimd();
+        private static JpegColorConverter GetYCbCrConverter(int precision) =>
+            FromYCbCrSimdAvx2.IsAvailable ? (JpegColorConverter)new FromYCbCrSimdAvx2(precision) : new FromYCbCrSimd(precision);
 
         /// <summary>
         /// A stack-only struct to reference the input buffers using <see cref="ReadOnlySpan{T}"/>-s.
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
index 1454bb5b12..83d65c0421 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
@@ -29,6 +29,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// </summary>
         JpegColorSpace ColorSpace { get; }
 
+        /// <summary>
+        /// Gets the number of bits used for precision.
+        /// </summary>
+        int Precision { get; }
+
         /// <summary>
         /// Gets the components.
         /// </summary>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
index da4b2847b8..b034198cfa 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.Primitives;
@@ -38,6 +39,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// </summary>
         private Size subSamplingDivisors;
 
+        /// <summary>
+        /// Defines the maximum value derived from the bitdepth
+        /// </summary>
+        private int maximumValue;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="JpegBlockPostProcessor"/> struct.
         /// </summary>
@@ -48,6 +54,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int qtIndex = component.QuantizationTableIndex;
             this.DequantiazationTable = ZigZag.CreateDequantizationTable(ref decoder.QuantizationTables[qtIndex]);
             this.subSamplingDivisors = component.SubSamplingDivisors;
+            this.maximumValue = (int)Math.Pow(2, decoder.Precision) - 1;
 
             this.SourceBlock = default;
             this.WorkspaceBlock1 = default;
@@ -65,7 +72,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="destArea">The destination buffer area.</param>
         public void ProcessBlockColorsInto(
             ref Block8x8 sourceBlock,
-            in BufferArea<float> destArea)
+            in BufferArea<float> destArea,
+            float maximumValue)
         {
             ref Block8x8F b = ref this.SourceBlock;
             b.LoadFrom(ref sourceBlock);
@@ -78,7 +86,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             // To conform better to libjpeg we actually NEED TO loose precision here.
             // This is because they store blocks as Int16 between all the operations.
             // To be "more accurate", we need to emulate this by rounding!
-            this.WorkspaceBlock1.NormalizeColorsAndRoundInplace();
+            this.WorkspaceBlock1.NormalizeColorsAndRoundInplace(maximumValue);
 
             this.WorkspaceBlock1.CopyTo(destArea, this.subSamplingDivisors.Width, this.subSamplingDivisors.Height);
         }
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
index 94ec600dd5..66c9245a30 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
@@ -78,6 +78,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public void CopyBlocksToColorBuffer()
         {
             var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
+            float maximumValue = (float)Math.Pow(2,this.ImagePostProcessor.RawJpeg.Precision) - 1;
 
             for (int y = 0; y < this.BlockRowsPerStep; y++)
             {
@@ -105,7 +106,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                         this.blockAreaSize.Width,
                         this.blockAreaSize.Height);
 
-                    blockPp.ProcessBlockColorsInto(ref block, destArea);
+                    blockPp.ProcessBlockColorsInto(ref block, destArea, maximumValue);
                 }
             }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
index 7ce86b4c9b..6b59955153 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
@@ -64,7 +64,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
             this.ComponentProcessors = rawJpeg.Components.Select(c => new JpegComponentPostProcessor(memoryAllocator, this, c)).ToArray();
             this.rgbaBuffer = memoryAllocator.Allocate<Vector4>(rawJpeg.ImageSizeInPixels.Width);
-            this.colorConverter = JpegColorConverter.GetConverter(rawJpeg.ColorSpace);
+            this.colorConverter = JpegColorConverter.GetConverter(rawJpeg.ColorSpace, rawJpeg.Precision);
         }
 
         /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 5bfe88cc63..fb10425bd3 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -160,6 +160,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <inheritdoc/>
         public JpegColorSpace ColorSpace { get; private set; }
 
+        /// <inheritdoc/>
+        public int Precision { get; private set; }
+
         /// <summary>
         /// Gets the components.
         /// </summary>
@@ -721,11 +724,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.InputStream.Read(this.temp, 0, remaining);
 
             // We only support 8-bit and 12-bit precision.
-            if (!SupportedPrecisions.Contains(this.temp[0]))
+            if (!this.SupportedPrecisions.Contains(this.temp[0]))
             {
                 throw new ImageFormatException("Only 8-Bit and 12-Bit precision supported.");
             }
 
+            this.Precision = this.temp[0];
+
             this.Frame = new JpegFrame
             {
                 Extended = frameMarker.Marker == JpegConstants.Markers.SOF1,
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
index 81c76390c1..7e7218c9dc 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
@@ -228,7 +228,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             this.PrintLinearData(input);
 
             Block8x8F dest = block;
-            dest.NormalizeColorsInplace();
+            dest.NormalizeColorsInplace(255);
 
             float[] array = new float[64];
             dest.CopyTo(array);
@@ -253,11 +253,11 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             Block8x8F source = CreateRandomFloatBlock(-200, 200, seed);
 
             Block8x8F expected = source;
-            expected.NormalizeColorsInplace();
+            expected.NormalizeColorsInplace(255);
             expected.RoundInplace();
 
             Block8x8F actual = source;
-            actual.NormalizeColorsAndRoundInplaceAvx2();
+            actual.NormalizeColorsAndRoundInplaceAvx2(255);
 
             this.Output.WriteLine(expected.ToString());
             this.Output.WriteLine(actual.ToString());
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegColorConverterTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegColorConverterTests.cs
index 8e30eb9e5d..caaad73c9f 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegColorConverterTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegColorConverterTests.cs
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         public void ConvertFromYCbCrBasic(int inputBufferLength, int resultBufferLength, int seed)
         {
             ValidateRgbToYCbCrConversion(
-                new JpegColorConverter.FromYCbCrBasic(),
+                new JpegColorConverter.FromYCbCrBasic(8),
                 3,
                 inputBufferLength,
                 resultBufferLength,
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             JpegColorConverter.ComponentValues values = CreateRandomValues(3, size, seed);
             var result = new Vector4[size];
 
-            JpegColorConverter.FromYCbCrSimd.ConvertCore(values, result);
+            JpegColorConverter.FromYCbCrSimd.ConvertCore(values, result, 255, 128);
 
             for (int i = 0; i < size; i++)
             {
@@ -88,7 +88,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         public void FromYCbCrSimd(int inputBufferLength, int resultBufferLength, int seed)
         {
             ValidateRgbToYCbCrConversion(
-                new JpegColorConverter.FromYCbCrSimd(),
+                new JpegColorConverter.FromYCbCrSimd(8),
                 3,
                 inputBufferLength,
                 resultBufferLength,
@@ -108,7 +108,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             //JpegColorConverter.FromYCbCrSimdAvx2.LogPlz = s => this.Output.WriteLine(s);
 
             ValidateRgbToYCbCrConversion(
-                new JpegColorConverter.FromYCbCrSimdAvx2(),
+                new JpegColorConverter.FromYCbCrSimdAvx2(8),
                 3,
                 inputBufferLength,
                 resultBufferLength,
@@ -140,7 +140,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             JpegColorConverter.ComponentValues values = CreateRandomValues(3, count, 1);
             var result = new Vector4[count];
 
-            JpegColorConverter converter = simd ? (JpegColorConverter)new JpegColorConverter.FromYCbCrSimd() : new JpegColorConverter.FromYCbCrBasic();
+            JpegColorConverter converter = simd ? (JpegColorConverter)new JpegColorConverter.FromYCbCrSimd(8) : new JpegColorConverter.FromYCbCrBasic(8);
 
             // Warm up:
             converter.ConvertToRgba(values, result);
@@ -161,7 +161,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             var v = new Vector4(0, 0, 0, 1F);
             var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
 
-            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Cmyk);
+            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Cmyk, 8);
             JpegColorConverter.ComponentValues values = CreateRandomValues(4, inputBufferLength, seed);
             var result = new Vector4[resultBufferLength];
 
@@ -194,7 +194,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         [MemberData(nameof(CommonConversionData))]
         public void ConvertFromGrayScale(int inputBufferLength, int resultBufferLength, int seed)
         {
-            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Grayscale);
+            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Grayscale, 8);
             JpegColorConverter.ComponentValues values = CreateRandomValues(1, inputBufferLength, seed);
             var result = new Vector4[resultBufferLength];
 
@@ -216,7 +216,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         [MemberData(nameof(CommonConversionData))]
         public void ConvertFromRgb(int inputBufferLength, int resultBufferLength, int seed)
         {
-            var converter = JpegColorConverter.GetConverter(JpegColorSpace.RGB);
+            var converter = JpegColorConverter.GetConverter(JpegColorSpace.RGB, 8);
             JpegColorConverter.ComponentValues values = CreateRandomValues(3, inputBufferLength, seed);
             var result = new Vector4[resultBufferLength];
 
@@ -243,7 +243,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             var v = new Vector4(0, 0, 0, 1F);
             var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
 
-            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Ycck);
+            var converter = JpegColorConverter.GetConverter(JpegColorSpace.Ycck, 8);
             JpegColorConverter.ComponentValues values = CreateRandomValues(4, inputBufferLength, seed);
             var result = new Vector4[resultBufferLength];
 
@@ -308,7 +308,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             int seed)
         {
             ValidateRgbToYCbCrConversion(
-                JpegColorConverter.GetConverter(colorSpace),
+                JpegColorConverter.GetConverter(colorSpace,8),
                 componentCount,
                 inputBufferLength,
                 resultBufferLength,

From aa8591950e701b8f8409b1f8b3c3766c37e904c7 Mon Sep 17 00:00:00 2001
From: Stephan Vedder <stephan.vedder@gmail.com>
Date: Sun, 9 Dec 2018 18:26:23 +0100
Subject: [PATCH 003/223] Add missing Non-SIMD implementation

---
 .../Formats/Jpeg/Components/Block8x8F.Generated.cs   |  5 +++--
 .../Formats/Jpeg/Components/Block8x8F.Generated.tt   |  5 +++--
 .../JpegColorConverter.FromYCbCrBasic.cs             | 10 +++++-----
 .../JpegColorConverter.FromYCbCrSimd.cs              |  3 ++-
 .../JpegColorConverter.FromYCbCrSimdAvx2.cs          | 12 +++++++-----
 .../Codecs/Jpeg/YCbCrColorConversion.cs              |  6 +++---
 6 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
index 15fbb83d96..1f47de594c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 
@@ -96,7 +97,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             Vector4 CMin4 = new Vector4(0F);
             Vector4 CMax4 = new Vector4(maximum);
-            Vector4 COff4 = new Vector4(maximum/2 + 1);
+            Vector4 COff4 = new Vector4((float)Math.Ceiling(maximum/2));
 
             this.V0L = Vector4.Clamp(this.V0L + COff4, CMin4, CMax4);
             this.V0R = Vector4.Clamp(this.V0R + COff4, CMin4, CMax4);
@@ -122,7 +123,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         [MethodImpl(InliningOptions.ShortMethod)]
         public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>(maximum/2 +1);
+            Vector<float> off = new Vector<float>((float)Math.Ceiling(maximum/2));
             Vector<float> max = new Vector<float>(maximum);
             
             ref Vector<float> row0 = ref Unsafe.As<Vector4, Vector<float>>(ref this.V0L);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
index 431ba86b03..ec4e06e429 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
@@ -11,6 +11,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 
@@ -61,7 +62,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             Vector4 CMin4 = new Vector4(0F);
             Vector4 CMax4 = new Vector4(maximum);
-            Vector4 COff4 = new Vector4(maximum/2 + 1);
+            Vector4 COff4 = new Vector4((float)Math.Ceiling(maximum/2));
 
             <#
 
@@ -85,7 +86,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         [MethodImpl(InliningOptions.ShortMethod)]
         public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>(maximum/2 +1);
+            Vector<float> off = new Vector<float>((float)Math.Ceiling(maximum/2));
             Vector<float> max = new Vector<float>(maximum);
             <#
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
index 2cab95ff09..124aac1224 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
@@ -17,10 +17,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
             public override void ConvertToRgba(in ComponentValues values, Span<Vector4> result)
             {
-                ConvertCore(values, result);
+                ConvertCore(values, result, this.MaximumValue, this.HalfValue);
             }
 
-            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result)
+            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result, float maxValue, float halfValue)
             {
                 // TODO: We can optimize a lot here with Vector<float> and SRCS.Unsafe()!
                 ReadOnlySpan<float> yVals = values.Component0;
@@ -29,13 +29,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1);
 
-                var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
+                var scale = new Vector4(1 / maxValue, 1 / maxValue, 1 / maxValue, 1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
                     float y = yVals[i];
-                    float cb = cbVals[i] - 128F;
-                    float cr = crVals[i] - 128F;
+                    float cb = cbVals[i] - halfValue;
+                    float cr = crVals[i] - halfValue;
 
                     v.X = MathF.Round(y + (1.402F * cr), MidpointRounding.AwayFromZero);
                     v.Y = MathF.Round(y - (0.344136F * cb) - (0.714136F * cr), MidpointRounding.AwayFromZero);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
index 1047957100..5de6f2ffb0 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
@@ -28,7 +28,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                     ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), this.MaximumValue, this.HalfValue);
                 }
 
-                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder));
+                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), 
+                    this.MaximumValue, this.HalfValue);
             }
 
             /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
index 4696959950..c34bc17ad5 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
@@ -28,16 +28,18 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 int simdCount = result.Length - remainder;
                 if (simdCount > 0)
                 {
-                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount));
+                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), 
+                        this.MaximumValue, this.HalfValue);
                 }
 
-                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder));
+                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), 
+                    this.MaximumValue, this.HalfValue);;
             }
 
             /// <summary>
             /// SIMD convert using buffers of sizes divisible by 8.
             /// </summary>
-            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result)
+            internal static void ConvertCore(in ComponentValues values, Span<Vector4> result, float maxValue, float halfValue)
             {
                 // This implementation is actually AVX specific.
                 // An AVX register is capable of storing 8 float-s.
@@ -57,7 +59,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 ref Vector4Octet resultBase =
                     ref Unsafe.As<Vector4, Vector4Octet>(ref MemoryMarshal.GetReference(result));
 
-                var chromaOffset = new Vector<float>(-128f);
+                var chromaOffset = new Vector<float>(-halfValue);
 
                 // Walking 8 elements at one step:
                 int n = result.Length / 8;
@@ -70,7 +72,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 ref Vector<float> ggRefAsVector = ref Unsafe.As<Vector4Pair, Vector<float>>(ref gg);
                 ref Vector<float> bbRefAsVector = ref Unsafe.As<Vector4Pair, Vector<float>>(ref bb);
 
-                var scale = new Vector<float>(1 / 255f);
+                var scale = new Vector<float>(1 / maxValue);
 
                 for (int i = 0; i < n; i++)
                 {
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/YCbCrColorConversion.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/YCbCrColorConversion.cs
index 05edd27919..8417b32f27 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/YCbCrColorConversion.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/YCbCrColorConversion.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         {
             var values = new JpegColorConverter.ComponentValues(this.input, 0);
 
-            JpegColorConverter.FromYCbCrBasic.ConvertCore(values, this.output);
+            JpegColorConverter.FromYCbCrBasic.ConvertCore(values, this.output, 255F, 128F);
         }
 
         [Benchmark]
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         {
             var values = new JpegColorConverter.ComponentValues(this.input, 0);
 
-            JpegColorConverter.FromYCbCrSimd.ConvertCore(values, this.output);
+            JpegColorConverter.FromYCbCrSimd.ConvertCore(values, this.output, 255F, 128F);
         }
 
         [Benchmark]
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         {
             var values = new JpegColorConverter.ComponentValues(this.input, 0);
 
-            JpegColorConverter.FromYCbCrSimdAvx2.ConvertCore(values, this.output);
+            JpegColorConverter.FromYCbCrSimdAvx2.ConvertCore(values, this.output, 255F, 128F);
         }
 
         private static Buffer2D<float>[] CreateRandomValues(

From 09c48226e45355e2b27ed9c6cadc5f9b25ca6333 Mon Sep 17 00:00:00 2001
From: Stephan Vedder <stephan.vedder@gmail.com>
Date: Mon, 10 Dec 2018 18:39:34 +0100
Subject: [PATCH 004/223] Fix style issues

---
 src/ImageSharp/Common/Tuples/Vector4Pair.cs              | 5 ++---
 .../ColorConverters/JpegColorConverter.FromCmyk.cs       | 9 +++++----
 .../ColorConverters/JpegColorConverter.FromGrayScale.cs  | 9 +++++----
 .../ColorConverters/JpegColorConverter.FromRgb.cs        | 9 +++++----
 .../ColorConverters/JpegColorConverter.FromYCbCrSimd.cs  | 3 +--
 .../JpegColorConverter.FromYCbCrSimdAvx2.cs              | 6 ++----
 .../ColorConverters/JpegColorConverter.FromYccK.cs       | 9 +++++----
 .../Decoder/ColorConverters/JpegColorConverter.cs        | 3 ++-
 .../Jpeg/Components/Decoder/JpegBlockPostProcessor.cs    | 4 +++-
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs           | 4 ++--
 10 files changed, 32 insertions(+), 29 deletions(-)

diff --git a/src/ImageSharp/Common/Tuples/Vector4Pair.cs b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
index 2a42160d65..2e5ca31371 100644
--- a/src/ImageSharp/Common/Tuples/Vector4Pair.cs
+++ b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
@@ -37,9 +37,8 @@ namespace SixLabors.ImageSharp.Tuples
             this.B += other.B;
         }
 
-        /// <summary>. Works only if Ve
-        /// Downscale method, specific to Jpeg color conversctor{float}.Count == 4!
-        /// TODO: Move it somewhere else.
+        /// <summary>.
+        /// Downscale method, specific to Jpeg color conversion. Works only if Vector{float}.Count == 4!        /// TODO: Move it somewhere else.
         /// </summary>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal void RoundAndDownscalePreAvx2(float downscaleFactor)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
index 28f0000195..d4dc31fe0c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
@@ -25,10 +25,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1F);
 
-                var scale = new Vector4(1 / this.MaximumValue, 
-                                        1 / this.MaximumValue, 
-                                        1 / this.MaximumValue, 
-                                        1F);
+                var scale = new Vector4(
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
index 36bd6fca99..4a5dfa6322 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
@@ -19,10 +19,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
             public override void ConvertToRgba(in ComponentValues values, Span<Vector4> result)
             {
-                var scale = new Vector4(1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1F);
+                var scale = new Vector4(
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1F);
 
                 ref float sBase = ref MemoryMarshal.GetReference(values.Component0);
                 ref Vector4 dBase = ref MemoryMarshal.GetReference(result);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
index 13eec7aad1..516dfb39fe 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
@@ -24,10 +24,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1);
 
-                var scale = new Vector4(1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1F);
+                var scale = new Vector4(
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
index 5de6f2ffb0..10ef02a931 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
@@ -28,8 +28,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                     ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), this.MaximumValue, this.HalfValue);
                 }
 
-                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), 
-                    this.MaximumValue, this.HalfValue);
+                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), this.MaximumValue, this.HalfValue);
             }
 
             /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
index c34bc17ad5..9953f78c18 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
@@ -28,12 +28,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 int simdCount = result.Length - remainder;
                 if (simdCount > 0)
                 {
-                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), 
-                        this.MaximumValue, this.HalfValue);
+                    ConvertCore(values.Slice(0, simdCount), result.Slice(0, simdCount), this.MaximumValue, this.HalfValue);
                 }
 
-                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), 
-                    this.MaximumValue, this.HalfValue);;
+                FromYCbCrBasic.ConvertCore(values.Slice(simdCount, remainder), result.Slice(simdCount, remainder), this.MaximumValue, this.HalfValue);
             }
 
             /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
index d4e1510156..94be11e237 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
@@ -25,10 +25,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 
                 var v = new Vector4(0, 0, 0, 1F);
 
-                var scale = new Vector4(1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1 / this.MaximumValue,
-                                        1F);
+                var scale = new Vector4(
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1 / this.MaximumValue,
+                                1F);
 
                 for (int i = 0; i < result.Length; i++)
                 {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
index 30dbdc8964..adcb49bef5 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
@@ -28,6 +28,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
                 new FromCmyk(8),
                 new FromGrayscale(8),
                 new FromRgb(8),
+
                 // 12-bit converters
                 GetYCbCrConverter(12),
                 new FromYccK(12),
@@ -63,7 +64,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         private float MaximumValue { get; }
 
         /// <summary>
-        /// Gets the maximum value of a sample
+        /// Gets the half of the maximum value of a sample
         /// </summary>
         private float HalfValue { get; }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
index b034198cfa..ad94572d9a 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
@@ -65,11 +65,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// Processes 'sourceBlock' producing Jpeg color channel values from spectral values:
         /// - Dequantize
         /// - Applying IDCT
-        /// - Level shift by +128, clip to [0, 255]
+        /// - Level shift by +maximumValue/2, clip to [0, maximumValue]
         /// - Copy the resulting color values into 'destArea' scaling up the block by amount defined in <see cref="subSamplingDivisors"/>
         /// </summary>
         /// <param name="sourceBlock">The source block.</param>
         /// <param name="destArea">The destination buffer area.</param>
+        /// <param name="maximumValue">The maximum value derived from the bitdepth.</param>
+
         public void ProcessBlockColorsInto(
             ref Block8x8 sourceBlock,
             in BufferArea<float> destArea,
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index fb10425bd3..c52858d4c3 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// The only supported precision
         /// </summary>
-        public readonly int[] SupportedPrecisions = { 8, 12 };
+        private readonly int[] supportedPrecisions = { 8, 12 };
 
         /// <summary>
         /// The global configuration
@@ -724,7 +724,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.InputStream.Read(this.temp, 0, remaining);
 
             // We only support 8-bit and 12-bit precision.
-            if (!this.SupportedPrecisions.Contains(this.temp[0]))
+            if (!this.supportedPrecisions.Contains(this.temp[0]))
             {
                 throw new ImageFormatException("Only 8-Bit and 12-Bit precision supported.");
             }

From 324f7129e0c7a8c8ba34a20ba827cfc06fe61915 Mon Sep 17 00:00:00 2001
From: Stephan Vedder <stephan.vedder@gmail.com>
Date: Mon, 10 Dec 2018 23:40:26 +0100
Subject: [PATCH 005/223] Fix style issues

---
 .../Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs   | 1 -
 .../Jpeg/Components/Decoder/JpegComponentPostProcessor.cs       | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
index ad94572d9a..fe39f41884 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
@@ -71,7 +71,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="sourceBlock">The source block.</param>
         /// <param name="destArea">The destination buffer area.</param>
         /// <param name="maximumValue">The maximum value derived from the bitdepth.</param>
-
         public void ProcessBlockColorsInto(
             ref Block8x8 sourceBlock,
             in BufferArea<float> destArea,
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
index 66c9245a30..e7f3e4fda5 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public void CopyBlocksToColorBuffer()
         {
             var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
-            float maximumValue = (float)Math.Pow(2,this.ImagePostProcessor.RawJpeg.Precision) - 1;
+            float maximumValue = (float)Math.Pow(2, this.ImagePostProcessor.RawJpeg.Precision) - 1;
 
             for (int y = 0; y < this.BlockRowsPerStep; y++)
             {

From 401144a421d05ccfddb4e2e7fb458f072a56cf53 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 21 Dec 2018 17:57:24 +1100
Subject: [PATCH 006/223] Minor optimizations

---
 .../ColorConverters/JpegColorConverter.cs       |  6 ++----
 .../Jpeg/Components/Decoder/IRawJpegData.cs     |  2 +-
 .../Decoder/JpegImagePostProcessor.cs           | 17 +++++++++++++----
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs  |  3 +--
 4 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
index adcb49bef5..c2e390c590 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
@@ -3,12 +3,10 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Numerics;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.Tuples;
-using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
@@ -73,8 +71,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         /// </summary>
         public static JpegColorConverter GetConverter(JpegColorSpace colorSpace, float precision)
         {
-            JpegColorConverter converter = Converters.FirstOrDefault(c => c.ColorSpace == colorSpace &&
-                                                                          c.Precision == precision);
+            JpegColorConverter converter = Array.Find(Converters, c => c.ColorSpace == colorSpace
+                                                                    && c.Precision == precision);
 
             if (converter is null)
             {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
index 83d65c0421..ace8d7215b 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/IRawJpegData.cs
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <summary>
         /// Gets the components.
         /// </summary>
-        IEnumerable<IJpegComponent> Components { get; }
+        IJpegComponent[] Components { get; }
 
         /// <summary>
         /// Gets the quantization tables, in zigzag order.
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
index 6b59955153..438749abf9 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.Buffers;
-using System.Linq;
 using System.Numerics;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
@@ -57,12 +56,18 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         {
             this.configuration = configuration;
             this.RawJpeg = rawJpeg;
-            IJpegComponent c0 = rawJpeg.Components.First();
+            IJpegComponent c0 = rawJpeg.Components[0];
             this.NumberOfPostProcessorSteps = c0.SizeInBlocks.Height / BlockRowsPerStep;
             this.PostProcessorBufferSize = new Size(c0.SizeInBlocks.Width * 8, PixelRowsPerStep);
 
             MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
-            this.ComponentProcessors = rawJpeg.Components.Select(c => new JpegComponentPostProcessor(memoryAllocator, this, c)).ToArray();
+
+            this.ComponentProcessors = new JpegComponentPostProcessor[rawJpeg.Components.Length];
+            for (int i = 0; i < rawJpeg.Components.Length; i++)
+            {
+                this.ComponentProcessors[i] = new JpegComponentPostProcessor(memoryAllocator, this, rawJpeg.Components[i]);
+            }
+
             this.rgbaBuffer = memoryAllocator.Allocate<Vector4>(rawJpeg.ImageSizeInPixels.Width);
             this.colorConverter = JpegColorConverter.GetConverter(rawJpeg.ColorSpace, rawJpeg.Precision);
         }
@@ -152,7 +157,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         {
             int maxY = Math.Min(destination.Height, this.PixelRowCounter + PixelRowsPerStep);
 
-            Buffer2D<float>[] buffers = this.ComponentProcessors.Select(cp => cp.ColorBuffer).ToArray();
+            var buffers = new Buffer2D<float>[this.ComponentProcessors.Length];
+            for (int i = 0; i < this.ComponentProcessors.Length; i++)
+            {
+                buffers[i] = this.ComponentProcessors[i].ColorBuffer;
+            }
 
             for (int yy = this.PixelRowCounter; yy < maxY; yy++)
             {
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index af6dfd9ec4..02ae022e11 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.Buffers.Binary;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
@@ -169,7 +168,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         public JpegComponent[] Components => this.Frame.Components;
 
         /// <inheritdoc/>
-        IEnumerable<IJpegComponent> IRawJpegData.Components => this.Components;
+        IJpegComponent[] IRawJpegData.Components => this.Components;
 
         /// <inheritdoc/>
         public Block8x8F[] QuantizationTables { get; private set; }

From b67b5b36864faefa890bac201e993b1ff87fd802 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 21 Dec 2018 18:13:19 +1100
Subject: [PATCH 007/223] Update reference images and decoder

---
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj | 2 +-
 tests/Images/External                          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 7452d6e498..e20f1514cc 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -27,7 +27,7 @@
   </ItemGroup>
   
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.9.0.1" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.9.2" />
     <PackageReference Include="System.Drawing.Common" Version="4.5.0" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.console" Version="2.3.1" />
diff --git a/tests/Images/External b/tests/Images/External
index 69603ee5b6..7ada45bc34 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 69603ee5b6f7dd64114fc44d321e50d9b2d439be
+Subproject commit 7ada45bc3484f40e28a50817386ca93f293acd11

From 880be0a5aa3feadad173775bea6fa8e50ef3e212 Mon Sep 17 00:00:00 2001
From: Peter Amrehn <peter.wendorff@gmx.de>
Date: Fri, 4 Jan 2019 21:37:24 +0100
Subject: [PATCH 008/223] #797 throw ImageFormatException when no StartOfFrame
 marker is found on a jpg image.

---
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs            | 5 +++++
 .../Formats/Jpg/JpegDecoderTests.Baseline.cs              | 8 ++++++++
 tests/ImageSharp.Tests/TestImages.cs                      | 1 +
 tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg   | 3 +++
 4 files changed, 17 insertions(+)
 create mode 100644 tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 02ae022e11..936fc0631b 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -292,6 +292,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                         case JpegConstants.Markers.SOS:
                             if (!metadataOnly)
                             {
+                                if (this.Frame is null)
+                                {
+                                    throw new ImageFormatException("no readable SOF marker found.");
+                                }
+
                                 this.ProcessStartOfScanMarker();
                                 break;
                             }
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
index 73167a4b7e..a2f57e485a 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
@@ -42,5 +42,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             // TODO: We need a public ImageDecoderException class in ImageSharp!
             Assert.ThrowsAny<Exception>(() => provider.GetImage(JpegDecoder));
         }
+
+        [Theory]
+        [WithFile(TestImages.Jpeg.Issues.InvalidJpegThrowsWrongException797, PixelTypes.Rgba32)]
+        public void LoadingImage_InvalidTagLength_ShouldThrow<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Assert.Throws<ImageFormatException>(() => provider.GetImage());
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 6141e9e2a0..460aceba0a 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -167,6 +167,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string OrderedInterleavedProgressive723C = "Jpg/issues/Issue723-Ordered-Interleaved-Progressive-C.jpg";
                 public const string ExifGetString750Transform = "Jpg/issues/issue750-exif-tranform.jpg";
                 public const string ExifGetString750Load = "Jpg/issues/issue750-exif-load.jpg";
+                public const string InvalidJpegThrowsWrongException797 = "Jpg/issues/Issue797-InvalidImage.jpg";
             }
 
             public static readonly string[] All = Baseline.All.Concat(Progressive.All).ToArray();
diff --git a/tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg b/tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg
new file mode 100644
index 0000000000..7c9190fbdb
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2c3c6a09c1ed868bb18c7c5038da743a88dbfd10762a2b12260053adf63b376f
+size 381

From 1359bceb45674cf3fccdd6774c639cf62d7dd61c Mon Sep 17 00:00:00 2001
From: Peter Amrehn <peter.wendorff@gmx.de>
Date: Sat, 5 Jan 2019 00:45:43 +0100
Subject: [PATCH 009/223] #797 - apply review remarks

---
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 936fc0631b..06c844d58e 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -292,11 +292,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                         case JpegConstants.Markers.SOS:
                             if (!metadataOnly)
                             {
-                                if (this.Frame is null)
-                                {
-                                    throw new ImageFormatException("no readable SOF marker found.");
-                                }
-
                                 this.ProcessStartOfScanMarker();
                                 break;
                             }
@@ -864,6 +859,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// </summary>
         private void ProcessStartOfScanMarker()
         {
+            if (this.Frame is null)
+            {
+                throw new ImageFormatException("No readable SOFn (Start Of Frame) marker found.");
+            }
+
             int selectorsCount = this.InputStream.ReadByte();
             for (int i = 0; i < selectorsCount; i++)
             {

From 78f0a41f0366b61f3986aace87ca560c20c63afa Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Wed, 9 Jan 2019 01:16:37 +1100
Subject: [PATCH 010/223] Use bounds checks in Huffman ctr. Fix #798

---
 .../Jpeg/Components/Decoder/HuffmanTable.cs   | 23 +++++++++++--------
 .../Formats/Jpg/JpegDecoderTests.Baseline.cs  | 10 ++++----
 tests/ImageSharp.Tests/TestImages.cs          |  1 +
 .../Issue798-AccessViolationException.jpg     |  3 +++
 4 files changed, 23 insertions(+), 14 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index 9e134746bc..9e11981b12 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -50,8 +50,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="values">The huffman values</param>
         public HuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
         {
-            const int Length = 257;
-            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(Length))
+            // We do some bounds checks in the code here to protect against AccessViolationExceptions
+            const int HuffCodeLength = 257;
+            const int MaxSizeLength = HuffCodeLength - 1;
+            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(HuffCodeLength))
             {
                 ref short huffcodeRef = ref MemoryMarshal.GetReference(huffcode.GetSpan());
                 ref byte codeLengthsRef = ref MemoryMarshal.GetReference(codeLengths);
@@ -63,7 +65,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 for (short i = 1; i < 17; i++)
                 {
                     byte length = Unsafe.Add(ref codeLengthsRef, i);
-                    for (short j = 0; j < length; j++)
+                    for (short j = 0; j < length && x < MaxSizeLength; j++)
                     {
                         Unsafe.Add(ref sizesRef, x++) = i;
                     }
@@ -84,7 +86,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                     Unsafe.Add(ref valOffsetRef, k) = (int)(si - code);
                     if (Unsafe.Add(ref sizesRef, si) == k)
                     {
-                        while (Unsafe.Add(ref sizesRef, si) == k)
+                        while (Unsafe.Add(ref sizesRef, si) == k && si < HuffCodeLength)
                         {
                             Unsafe.Add(ref huffcodeRef, si++) = (short)code++;
                         }
@@ -100,19 +102,20 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                 // Generate non-spec lookup tables to speed up decoding.
                 const int FastBits = ScanDecoder.FastBits;
-                ref byte fastRef = ref this.Lookahead[0];
-                Unsafe.InitBlockUnaligned(ref fastRef, 0xFF, 1 << FastBits); // Flag for non-accelerated
+                ref byte lookaheadRef = ref this.Lookahead[0];
+                const uint MaxFastLength = 1 << FastBits;
+                Unsafe.InitBlockUnaligned(ref lookaheadRef, 0xFF, MaxFastLength); // Flag for non-accelerated
 
                 for (int i = 0; i < si; i++)
                 {
                     int size = Unsafe.Add(ref sizesRef, i);
                     if (size <= FastBits)
                     {
-                        int c = Unsafe.Add(ref huffcodeRef, i) << (FastBits - size);
-                        int m = 1 << (FastBits - size);
-                        for (int l = 0; l < m; l++)
+                        int huffCode = Unsafe.Add(ref huffcodeRef, i) << (FastBits - size);
+                        int max = 1 << (FastBits - size);
+                        for (int left = 0; left < max; left++)
                         {
-                            Unsafe.Add(ref fastRef, c + l) = (byte)i;
+                            Unsafe.Add(ref lookaheadRef, huffCode + left) = (byte)i;
                         }
                     }
                 }
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
index a2f57e485a..1c9d207cd1 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
@@ -46,9 +46,11 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         [Theory]
         [WithFile(TestImages.Jpeg.Issues.InvalidJpegThrowsWrongException797, PixelTypes.Rgba32)]
         public void LoadingImage_InvalidTagLength_ShouldThrow<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            Assert.Throws<ImageFormatException>(() => provider.GetImage());
-        }
+            where TPixel : struct, IPixel<TPixel> => Assert.Throws<ImageFormatException>(() => provider.GetImage());
+
+        [Theory]
+        [WithFile(TestImages.Jpeg.Issues.AccessViolationException798, PixelTypes.Rgba32)]
+        public void LoadingImage_BadHuffman_ShouldNotThrow<TPixel>(TestImageProvider<TPixel> provider)
+    where TPixel : struct, IPixel<TPixel> => Assert.NotNull(provider.GetImage());
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 460aceba0a..8d8a32fba3 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -168,6 +168,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string ExifGetString750Transform = "Jpg/issues/issue750-exif-tranform.jpg";
                 public const string ExifGetString750Load = "Jpg/issues/issue750-exif-load.jpg";
                 public const string InvalidJpegThrowsWrongException797 = "Jpg/issues/Issue797-InvalidImage.jpg";
+                public const string AccessViolationException798 = "Jpg/issues/Issue798-AccessViolationException.jpg";
             }
 
             public static readonly string[] All = Baseline.All.Concat(Progressive.All).ToArray();
diff --git a/tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg b/tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg
new file mode 100644
index 0000000000..6cdbfff7c5
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:85a9eabf5b14ff974b91ba9e9b0001eda56365903d92cb4eccc52afc7f2477ab
+size 381

From bbb739ba939d13623829ad8da3a755ddf0d496db Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 18 Jan 2019 07:58:54 +1100
Subject: [PATCH 011/223] Fix Color Filters (#806)

* Use Matrix5x4 and fix Hue Filter

* Update test references. Fix #802

* Increase tolerance to handle xplat variance.

* Rename to ColorMatrix
---
 src/ImageSharp/Common/Helpers/Vector4Utils.cs |  37 ++
 src/ImageSharp/Primitives/ColorMatrix.cs      | 459 ++++++++++++++++++
 src/ImageSharp/Processing/FilterExtensions.cs |   6 +-
 .../Processing/KnownFilterMatrices.cs         | 358 +++++++-------
 .../Processors/Filters/FilterProcessor.cs     |  36 +-
 .../Formats/GeneralFormatTests.cs             |   3 +-
 .../Helpers/Vector4UtilsTests.cs              |   6 +-
 .../Primitives/ColorMatrixTests.cs            | 270 +++++++++++
 .../Processors/Filters/BrightnessTest.cs      |   8 +-
 .../Processors/Filters/ColorBlindnessTest.cs  |   9 +-
 .../Processors/Filters/FilterTest.cs          |  20 +-
 .../TestUtilities/ApproximateFloatComparer.cs |  28 +-
 tests/Images/External                         |   2 +-
 13 files changed, 1017 insertions(+), 225 deletions(-)
 create mode 100644 src/ImageSharp/Primitives/ColorMatrix.cs
 create mode 100644 tests/ImageSharp.Tests/Primitives/ColorMatrixTests.cs

diff --git a/src/ImageSharp/Common/Helpers/Vector4Utils.cs b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
index 75bb00b6a5..5c122217d1 100644
--- a/src/ImageSharp/Common/Helpers/Vector4Utils.cs
+++ b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
@@ -5,6 +5,7 @@ using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using SixLabors.ImageSharp.Primitives;
 
 namespace SixLabors.ImageSharp
 {
@@ -70,5 +71,41 @@ namespace SixLabors.ImageSharp
                 UnPremultiply(ref v);
             }
         }
+
+        /// <summary>
+        /// Transforms a vector by the given matrix.
+        /// </summary>
+        /// <param name="vector">The source vector.</param>
+        /// <param name="matrix">The transformation matrix.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Transform(ref Vector4 vector, ref ColorMatrix matrix)
+        {
+            float x = vector.X;
+            float y = vector.Y;
+            float z = vector.Z;
+            float w = vector.W;
+
+            vector.X = (x * matrix.M11) + (y * matrix.M21) + (z * matrix.M31) + (w * matrix.M41) + matrix.M51;
+            vector.Y = (x * matrix.M12) + (y * matrix.M22) + (z * matrix.M32) + (w * matrix.M42) + matrix.M52;
+            vector.Z = (x * matrix.M13) + (y * matrix.M23) + (z * matrix.M33) + (w * matrix.M43) + matrix.M53;
+            vector.W = (x * matrix.M14) + (y * matrix.M24) + (z * matrix.M34) + (w * matrix.M44) + matrix.M54;
+        }
+
+        /// <summary>
+        /// Bulk variant of <see cref="Transform(ref Vector4, ref ColorMatrix)"/>
+        /// </summary>
+        /// <param name="vectors">The span of vectors</param>
+        /// <param name="matrix">The transformation matrix.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Transform(Span<Vector4> vectors, ref ColorMatrix matrix)
+        {
+            ref Vector4 baseRef = ref MemoryMarshal.GetReference(vectors);
+
+            for (int i = 0; i < vectors.Length; i++)
+            {
+                ref Vector4 v = ref Unsafe.Add(ref baseRef, i);
+                Transform(ref v, ref matrix);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Primitives/ColorMatrix.cs b/src/ImageSharp/Primitives/ColorMatrix.cs
new file mode 100644
index 0000000000..af2e9465a9
--- /dev/null
+++ b/src/ImageSharp/Primitives/ColorMatrix.cs
@@ -0,0 +1,459 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+#pragma warning disable SA1117 // Parameters should be on same line or separate lines
+using System;
+using System.Globalization;
+using System.Runtime.InteropServices;
+
+namespace SixLabors.ImageSharp.Primitives
+{
+    /// <summary>
+    /// A structure encapsulating a 5x4 matrix used for transforming the color and alpha components of an image.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct ColorMatrix : IEquatable<ColorMatrix>
+    {
+        /// <summary>
+        /// Value at row 1, column 1 of the matrix.
+        /// </summary>
+        public float M11;
+
+        /// <summary>
+        /// Value at row 1, column 2 of the matrix.
+        /// </summary>
+        public float M12;
+
+        /// <summary>
+        /// Value at row 1, column 3 of the matrix.
+        /// </summary>
+        public float M13;
+
+        /// <summary>
+        /// Value at row 1, column 4 of the matrix.
+        /// </summary>
+        public float M14;
+
+        /// <summary>
+        /// Value at row 2, column 1 of the matrix.
+        /// </summary>
+        public float M21;
+
+        /// <summary>
+        /// Value at row 2, column 2 of the matrix.
+        /// </summary>
+        public float M22;
+
+        /// <summary>
+        /// Value at row 2, column 3 of the matrix.
+        /// </summary>
+        public float M23;
+
+        /// <summary>
+        /// Value at row 2, column 4 of the matrix.
+        /// </summary>
+        public float M24;
+
+        /// <summary>
+        /// Value at row 3, column 1 of the matrix.
+        /// </summary>
+        public float M31;
+
+        /// <summary>
+        /// Value at row 3, column 2 of the matrix.
+        /// </summary>
+        public float M32;
+
+        /// <summary>
+        /// Value at row 3, column 3 of the matrix.
+        /// </summary>
+        public float M33;
+
+        /// <summary>
+        /// Value at row 3, column 4 of the matrix.
+        /// </summary>
+        public float M34;
+
+        /// <summary>
+        /// Value at row 4, column 1 of the matrix.
+        /// </summary>
+        public float M41;
+
+        /// <summary>
+        /// Value at row 4, column 2 of the matrix.
+        /// </summary>
+        public float M42;
+
+        /// <summary>
+        /// Value at row 4, column 3 of the matrix.
+        /// </summary>
+        public float M43;
+
+        /// <summary>
+        /// Value at row 4, column 4 of the matrix.
+        /// </summary>
+        public float M44;
+
+        /// <summary>
+        /// Value at row 5, column 1 of the matrix.
+        /// </summary>
+        public float M51;
+
+        /// <summary>
+        /// Value at row 5, column 2 of the matrix.
+        /// </summary>
+        public float M52;
+
+        /// <summary>
+        /// Value at row 5, column 3 of the matrix.
+        /// </summary>
+        public float M53;
+
+        /// <summary>
+        /// Value at row 5, column 4 of the matrix.
+        /// </summary>
+        public float M54;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ColorMatrix"/> struct.
+        /// </summary>
+        /// <param name="m11">The value at row 1, column 1 of the matrix.</param>
+        /// <param name="m12">The value at row 1, column 2 of the matrix.</param>
+        /// <param name="m13">The value at row 1, column 3 of the matrix.</param>
+        /// <param name="m14">The value at row 1, column 4 of the matrix.</param>
+        /// <param name="m21">The value at row 2, column 1 of the matrix.</param>
+        /// <param name="m22">The value at row 2, column 2 of the matrix.</param>
+        /// <param name="m23">The value at row 2, column 3 of the matrix.</param>
+        /// <param name="m24">The value at row 2, column 4 of the matrix.</param>
+        /// <param name="m31">The value at row 3, column 1 of the matrix.</param>
+        /// <param name="m32">The value at row 3, column 2 of the matrix.</param>
+        /// <param name="m33">The value at row 3, column 3 of the matrix.</param>
+        /// <param name="m34">The value at row 3, column 4 of the matrix.</param>
+        /// <param name="m41">The value at row 4, column 1 of the matrix.</param>
+        /// <param name="m42">The value at row 4, column 2 of the matrix.</param>
+        /// <param name="m43">The value at row 4, column 3 of the matrix.</param>
+        /// <param name="m44">The value at row 4, column 4 of the matrix.</param>
+        /// <param name="m51">The value at row 5, column 1 of the matrix.</param>
+        /// <param name="m52">The value at row 5, column 2 of the matrix.</param>
+        /// <param name="m53">The value at row 5, column 3 of the matrix.</param>
+        /// <param name="m54">The value at row 5, column 4 of the matrix.</param>
+        public ColorMatrix(float m11, float m12, float m13, float m14,
+                         float m21, float m22, float m23, float m24,
+                         float m31, float m32, float m33, float m34,
+                         float m41, float m42, float m43, float m44,
+                         float m51, float m52, float m53, float m54)
+        {
+            this.M11 = m11;
+            this.M12 = m12;
+            this.M13 = m13;
+            this.M14 = m14;
+
+            this.M21 = m21;
+            this.M22 = m22;
+            this.M23 = m23;
+            this.M24 = m24;
+
+            this.M31 = m31;
+            this.M32 = m32;
+            this.M33 = m33;
+            this.M34 = m34;
+
+            this.M41 = m41;
+            this.M42 = m42;
+            this.M43 = m43;
+            this.M44 = m44;
+
+            this.M51 = m51;
+            this.M52 = m52;
+            this.M53 = m53;
+            this.M54 = m54;
+        }
+
+        /// <summary>
+        /// Gets the multiplicative identity matrix.
+        /// </summary>
+        public static ColorMatrix Identity { get; } =
+            new ColorMatrix(1F, 0F, 0F, 0F,
+                          0F, 1F, 0F, 0F,
+                          0F, 0F, 1F, 0F,
+                          0F, 0F, 0F, 1F,
+                          0F, 0F, 0F, 0F);
+
+        /// <summary>
+        /// Gets a value indicating whether the matrix is the identity matrix.
+        /// </summary>
+        public bool IsIdentity
+        {
+            get
+            {
+                // Check diagonal element first for early out.
+                return this.M11 == 1F && this.M22 == 1F && this.M33 == 1F && this.M44 == 1F
+                       && this.M12 == 0F && this.M13 == 0F && this.M14 == 0F
+                       && this.M21 == 0F && this.M23 == 0F && this.M24 == 0F
+                       && this.M31 == 0F && this.M32 == 0F && this.M34 == 0F
+                       && this.M41 == 0F && this.M42 == 0F && this.M43 == 0F
+                       && this.M51 == 0F && this.M52 == 0F && this.M53 == 0F && this.M54 == 0F;
+            }
+        }
+
+        /// <summary>
+        /// Adds two matrices together.
+        /// </summary>
+        /// <param name="value1">The first source matrix.</param>
+        /// <param name="value2">The second source matrix.</param>
+        /// <returns>The resulting matrix.</returns>
+        public static ColorMatrix operator +(ColorMatrix value1, ColorMatrix value2)
+        {
+            ColorMatrix m;
+
+            m.M11 = value1.M11 + value2.M11;
+            m.M12 = value1.M12 + value2.M12;
+            m.M13 = value1.M13 + value2.M13;
+            m.M14 = value1.M14 + value2.M14;
+            m.M21 = value1.M21 + value2.M21;
+            m.M22 = value1.M22 + value2.M22;
+            m.M23 = value1.M23 + value2.M23;
+            m.M24 = value1.M24 + value2.M24;
+            m.M31 = value1.M31 + value2.M31;
+            m.M32 = value1.M32 + value2.M32;
+            m.M33 = value1.M33 + value2.M33;
+            m.M34 = value1.M34 + value2.M34;
+            m.M41 = value1.M41 + value2.M41;
+            m.M42 = value1.M42 + value2.M42;
+            m.M43 = value1.M43 + value2.M43;
+            m.M44 = value1.M44 + value2.M44;
+            m.M51 = value1.M51 + value2.M51;
+            m.M52 = value1.M52 + value2.M52;
+            m.M53 = value1.M53 + value2.M53;
+            m.M54 = value1.M54 + value2.M54;
+
+            return m;
+        }
+
+        /// <summary>
+        /// Subtracts the second matrix from the first.
+        /// </summary>
+        /// <param name="value1">The first source matrix.</param>
+        /// <param name="value2">The second source matrix.</param>
+        /// <returns>The result of the subtraction.</returns>
+        public static ColorMatrix operator -(ColorMatrix value1, ColorMatrix value2)
+        {
+            ColorMatrix m;
+
+            m.M11 = value1.M11 - value2.M11;
+            m.M12 = value1.M12 - value2.M12;
+            m.M13 = value1.M13 - value2.M13;
+            m.M14 = value1.M14 - value2.M14;
+            m.M21 = value1.M21 - value2.M21;
+            m.M22 = value1.M22 - value2.M22;
+            m.M23 = value1.M23 - value2.M23;
+            m.M24 = value1.M24 - value2.M24;
+            m.M31 = value1.M31 - value2.M31;
+            m.M32 = value1.M32 - value2.M32;
+            m.M33 = value1.M33 - value2.M33;
+            m.M34 = value1.M34 - value2.M34;
+            m.M41 = value1.M41 - value2.M41;
+            m.M42 = value1.M42 - value2.M42;
+            m.M43 = value1.M43 - value2.M43;
+            m.M44 = value1.M44 - value2.M44;
+            m.M51 = value1.M51 - value2.M51;
+            m.M52 = value1.M52 - value2.M52;
+            m.M53 = value1.M53 - value2.M53;
+            m.M54 = value1.M54 - value2.M54;
+
+            return m;
+        }
+
+        /// <summary>
+        /// Returns a new matrix with the negated elements of the given matrix.
+        /// </summary>
+        /// <param name="value">The source matrix.</param>
+        /// <returns>The negated matrix.</returns>
+        public static unsafe ColorMatrix operator -(ColorMatrix value)
+        {
+            ColorMatrix m;
+
+            m.M11 = -value.M11;
+            m.M12 = -value.M12;
+            m.M13 = -value.M13;
+            m.M14 = -value.M14;
+            m.M21 = -value.M21;
+            m.M22 = -value.M22;
+            m.M23 = -value.M23;
+            m.M24 = -value.M24;
+            m.M31 = -value.M31;
+            m.M32 = -value.M32;
+            m.M33 = -value.M33;
+            m.M34 = -value.M34;
+            m.M41 = -value.M41;
+            m.M42 = -value.M42;
+            m.M43 = -value.M43;
+            m.M44 = -value.M44;
+            m.M51 = -value.M51;
+            m.M52 = -value.M52;
+            m.M53 = -value.M53;
+            m.M54 = -value.M54;
+
+            return m;
+        }
+
+        /// <summary>
+        /// Multiplies a matrix by another matrix.
+        /// </summary>
+        /// <param name="value1">The first source matrix.</param>
+        /// <param name="value2">The second source matrix.</param>
+        /// <returns>The result of the multiplication.</returns>
+        public static ColorMatrix operator *(ColorMatrix value1, ColorMatrix value2)
+        {
+            ColorMatrix m;
+
+            // First row
+            m.M11 = (value1.M11 * value2.M11) + (value1.M12 * value2.M21) + (value1.M13 * value2.M31) + (value1.M14 * value2.M41);
+            m.M12 = (value1.M11 * value2.M12) + (value1.M12 * value2.M22) + (value1.M13 * value2.M32) + (value1.M14 * value2.M42);
+            m.M13 = (value1.M11 * value2.M13) + (value1.M12 * value2.M23) + (value1.M13 * value2.M33) + (value1.M14 * value2.M43);
+            m.M14 = (value1.M11 * value2.M14) + (value1.M12 * value2.M24) + (value1.M13 * value2.M34) + (value1.M14 * value2.M44);
+
+            // Second row
+            m.M21 = (value1.M21 * value2.M11) + (value1.M22 * value2.M21) + (value1.M23 * value2.M31) + (value1.M24 * value2.M41);
+            m.M22 = (value1.M21 * value2.M12) + (value1.M22 * value2.M22) + (value1.M23 * value2.M32) + (value1.M24 * value2.M42);
+            m.M23 = (value1.M21 * value2.M13) + (value1.M22 * value2.M23) + (value1.M23 * value2.M33) + (value1.M24 * value2.M43);
+            m.M24 = (value1.M21 * value2.M14) + (value1.M22 * value2.M24) + (value1.M23 * value2.M34) + (value1.M24 * value2.M44);
+
+            // Third row
+            m.M31 = (value1.M31 * value2.M11) + (value1.M32 * value2.M21) + (value1.M33 * value2.M31) + (value1.M34 * value2.M41);
+            m.M32 = (value1.M31 * value2.M12) + (value1.M32 * value2.M22) + (value1.M33 * value2.M32) + (value1.M34 * value2.M42);
+            m.M33 = (value1.M31 * value2.M13) + (value1.M32 * value2.M23) + (value1.M33 * value2.M33) + (value1.M34 * value2.M43);
+            m.M34 = (value1.M31 * value2.M14) + (value1.M32 * value2.M24) + (value1.M33 * value2.M34) + (value1.M34 * value2.M44);
+
+            // Fourth row
+            m.M41 = (value1.M41 * value2.M11) + (value1.M42 * value2.M21) + (value1.M43 * value2.M31) + (value1.M44 * value2.M41);
+            m.M42 = (value1.M41 * value2.M12) + (value1.M42 * value2.M22) + (value1.M43 * value2.M32) + (value1.M44 * value2.M42);
+            m.M43 = (value1.M41 * value2.M13) + (value1.M42 * value2.M23) + (value1.M43 * value2.M33) + (value1.M44 * value2.M43);
+            m.M44 = (value1.M41 * value2.M14) + (value1.M42 * value2.M24) + (value1.M43 * value2.M34) + (value1.M44 * value2.M44);
+
+            // Fifth row
+            m.M51 = (value1.M51 * value2.M11) + (value1.M52 * value2.M21) + (value1.M53 * value2.M31) + (value1.M54 * value2.M41) + value2.M51;
+            m.M52 = (value1.M51 * value2.M12) + (value1.M52 * value2.M22) + (value1.M53 * value2.M32) + (value1.M54 * value2.M52) + value2.M52;
+            m.M53 = (value1.M51 * value2.M13) + (value1.M52 * value2.M23) + (value1.M53 * value2.M33) + (value1.M54 * value2.M53) + value2.M53;
+            m.M54 = (value1.M51 * value2.M14) + (value1.M52 * value2.M24) + (value1.M53 * value2.M34) + (value1.M54 * value2.M54) + value2.M54;
+
+            return m;
+        }
+
+        /// <summary>
+        /// Multiplies a matrix by a scalar value.
+        /// </summary>
+        /// <param name="value1">The source matrix.</param>
+        /// <param name="value2">The scaling factor.</param>
+        /// <returns>The scaled matrix.</returns>
+        public static ColorMatrix operator *(ColorMatrix value1, float value2)
+        {
+            ColorMatrix m;
+
+            m.M11 = value1.M11 * value2;
+            m.M12 = value1.M12 * value2;
+            m.M13 = value1.M13 * value2;
+            m.M14 = value1.M14 * value2;
+            m.M21 = value1.M21 * value2;
+            m.M22 = value1.M22 * value2;
+            m.M23 = value1.M23 * value2;
+            m.M24 = value1.M24 * value2;
+            m.M31 = value1.M31 * value2;
+            m.M32 = value1.M32 * value2;
+            m.M33 = value1.M33 * value2;
+            m.M34 = value1.M34 * value2;
+            m.M41 = value1.M41 * value2;
+            m.M42 = value1.M42 * value2;
+            m.M43 = value1.M43 * value2;
+            m.M44 = value1.M44 * value2;
+            m.M51 = value1.M51 * value2;
+            m.M52 = value1.M52 * value2;
+            m.M53 = value1.M53 * value2;
+            m.M54 = value1.M54 * value2;
+
+            return m;
+        }
+
+        /// <summary>
+        /// Returns a boolean indicating whether the given two matrices are equal.
+        /// </summary>
+        /// <param name="value1">The first matrix to compare.</param>
+        /// <param name="value2">The second matrix to compare.</param>
+        /// <returns>True if the given matrices are equal; False otherwise.</returns>
+        public static bool operator ==(ColorMatrix value1, ColorMatrix value2) => value1.Equals(value2);
+
+        /// <summary>
+        /// Returns a boolean indicating whether the given two matrices are not equal.
+        /// </summary>
+        /// <param name="value1">The first matrix to compare.</param>
+        /// <param name="value2">The second matrix to compare.</param>
+        /// <returns>True if the given matrices are equal; False otherwise.</returns>
+        public static bool operator !=(ColorMatrix value1, ColorMatrix value2) => !value1.Equals(value2);
+
+        /// <inheritdoc/>
+        public override bool Equals(object obj) => obj is ColorMatrix matrix && this.Equals(matrix);
+
+        /// <inheritdoc/>
+        public bool Equals(ColorMatrix other) =>
+            this.M11 == other.M11
+            && this.M12 == other.M12
+            && this.M13 == other.M13
+            && this.M14 == other.M14
+            && this.M21 == other.M21
+            && this.M22 == other.M22
+            && this.M23 == other.M23
+            && this.M24 == other.M24
+            && this.M31 == other.M31
+            && this.M32 == other.M32
+            && this.M33 == other.M33
+            && this.M34 == other.M34
+            && this.M41 == other.M41
+            && this.M42 == other.M42
+            && this.M43 == other.M43
+            && this.M44 == other.M44
+            && this.M51 == other.M51
+            && this.M52 == other.M52
+            && this.M53 == other.M53
+            && this.M54 == other.M54;
+
+        /// <inheritdoc/>
+        public override int GetHashCode()
+        {
+            HashCode hash = default;
+            hash.Add(this.M11);
+            hash.Add(this.M12);
+            hash.Add(this.M13);
+            hash.Add(this.M14);
+            hash.Add(this.M21);
+            hash.Add(this.M22);
+            hash.Add(this.M23);
+            hash.Add(this.M24);
+            hash.Add(this.M31);
+            hash.Add(this.M32);
+            hash.Add(this.M33);
+            hash.Add(this.M34);
+            hash.Add(this.M41);
+            hash.Add(this.M42);
+            hash.Add(this.M43);
+            hash.Add(this.M44);
+            hash.Add(this.M51);
+            hash.Add(this.M52);
+            hash.Add(this.M53);
+            hash.Add(this.M54);
+            return hash.ToHashCode();
+        }
+
+        /// <inheritdoc/>
+        public override string ToString()
+        {
+            CultureInfo ci = CultureInfo.CurrentCulture;
+
+            return string.Format(ci, "{{ {{M11:{0} M12:{1} M13:{2} M14:{3}}} {{M21:{4} M22:{5} M23:{6} M24:{7}}} {{M31:{8} M32:{9} M33:{10} M34:{11}}} {{M41:{12} M42:{13} M43:{14} M44:{15}}} {{M51:{16} M52:{17} M53:{18} M54:{19}}} }}",
+                                 this.M11.ToString(ci), this.M12.ToString(ci), this.M13.ToString(ci), this.M14.ToString(ci),
+                                 this.M21.ToString(ci), this.M22.ToString(ci), this.M23.ToString(ci), this.M24.ToString(ci),
+                                 this.M31.ToString(ci), this.M32.ToString(ci), this.M33.ToString(ci), this.M34.ToString(ci),
+                                 this.M41.ToString(ci), this.M42.ToString(ci), this.M43.ToString(ci), this.M44.ToString(ci),
+                                 this.M51.ToString(ci), this.M52.ToString(ci), this.M53.ToString(ci), this.M54.ToString(ci));
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/FilterExtensions.cs b/src/ImageSharp/Processing/FilterExtensions.cs
index bfae4ae654..70ac232863 100644
--- a/src/ImageSharp/Processing/FilterExtensions.cs
+++ b/src/ImageSharp/Processing/FilterExtensions.cs
@@ -1,8 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing.Processors.Filters;
 using SixLabors.Primitives;
 
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="matrix">The filter color matrix</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, Matrix4x4 matrix)
+        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, ColorMatrix matrix)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new FilterProcessor<TPixel>(matrix));
 
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, Matrix4x4 matrix, Rectangle rectangle)
+        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, ColorMatrix matrix, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new FilterProcessor<TPixel>(matrix), rectangle);
     }
diff --git a/src/ImageSharp/Processing/KnownFilterMatrices.cs b/src/ImageSharp/Processing/KnownFilterMatrices.cs
index cf0d19ff85..9c725d0277 100644
--- a/src/ImageSharp/Processing/KnownFilterMatrices.cs
+++ b/src/ImageSharp/Processing/KnownFilterMatrices.cs
@@ -2,19 +2,28 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Numerics;
-
+using SixLabors.ImageSharp.Primitives;
+
+// Many of these matrices are tranlated from Chromium project where
+// SkScalar[] is memory-mapped to a row-major matrix.
+// The following translates to our column-major form:
+//
+// | 0| 1| 2| 3| 4|   |0|5|10|15|   |M11|M12|M13|M14|
+// | 5| 6| 7| 8| 9|   |1|6|11|16|   |M21|M22|M23|M24|
+// |10|11|12|13|14| = |2|7|12|17| = |M31|M32|M33|M34|
+// |15|16|17|18|19|   |3|8|13|18|   |M41|M42|M43|M44|
+//                    |4|9|14|19|   |M51|M52|M53|M54|
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// A collection of known <see cref="Matrix4x4"/> values for composing filters
+    /// A collection of known <see cref="ColorMatrix"/> values for composing filters
     /// </summary>
     public static class KnownFilterMatrices
     {
         /// <summary>
         /// Gets a filter recreating Achromatomaly (Color desensitivity) color blindness
         /// </summary>
-        public static Matrix4x4 AchromatomalyFilter { get; } = new Matrix4x4
+        public static ColorMatrix AchromatomalyFilter { get; } = new ColorMatrix
         {
             M11 = .618F,
             M12 = .163F,
@@ -31,7 +40,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets a filter recreating Achromatopsia (Monochrome) color blindness.
         /// </summary>
-        public static Matrix4x4 AchromatopsiaFilter { get; } = new Matrix4x4
+        public static ColorMatrix AchromatopsiaFilter { get; } = new ColorMatrix
         {
             M11 = .299F,
             M12 = .299F,
@@ -42,97 +51,97 @@ namespace SixLabors.ImageSharp.Processing
             M31 = .114F,
             M32 = .114F,
             M33 = .114F,
-            M44 = 1
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Deuteranomaly (Green-Weak) color blindness.
         /// </summary>
-        public static Matrix4x4 DeuteranomalyFilter { get; } = new Matrix4x4
+        public static ColorMatrix DeuteranomalyFilter { get; } = new ColorMatrix
         {
-            M11 = 0.8F,
-            M12 = 0.258F,
-            M21 = 0.2F,
-            M22 = 0.742F,
-            M23 = 0.142F,
-            M33 = 0.858F,
-            M44 = 1
+            M11 = .8F,
+            M12 = .258F,
+            M21 = .2F,
+            M22 = .742F,
+            M23 = .142F,
+            M33 = .858F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Deuteranopia (Green-Blind) color blindness.
         /// </summary>
-        public static Matrix4x4 DeuteranopiaFilter { get; } = new Matrix4x4
+        public static ColorMatrix DeuteranopiaFilter { get; } = new ColorMatrix
         {
-            M11 = 0.625F,
-            M12 = 0.7F,
-            M21 = 0.375F,
-            M22 = 0.3F,
-            M23 = 0.3F,
-            M33 = 0.7F,
-            M44 = 1
+            M11 = .625F,
+            M12 = .7F,
+            M21 = .375F,
+            M22 = .3F,
+            M23 = .3F,
+            M33 = .7F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Protanomaly (Red-Weak) color blindness.
         /// </summary>
-        public static Matrix4x4 ProtanomalyFilter { get; } = new Matrix4x4
+        public static ColorMatrix ProtanomalyFilter { get; } = new ColorMatrix
         {
-            M11 = 0.817F,
-            M12 = 0.333F,
-            M21 = 0.183F,
-            M22 = 0.667F,
-            M23 = 0.125F,
-            M33 = 0.875F,
-            M44 = 1
+            M11 = .817F,
+            M12 = .333F,
+            M21 = .183F,
+            M22 = .667F,
+            M23 = .125F,
+            M33 = .875F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Protanopia (Red-Blind) color blindness.
         /// </summary>
-        public static Matrix4x4 ProtanopiaFilter { get; } = new Matrix4x4
+        public static ColorMatrix ProtanopiaFilter { get; } = new ColorMatrix
         {
-            M11 = 0.567F,
-            M12 = 0.558F,
-            M21 = 0.433F,
-            M22 = 0.442F,
-            M23 = 0.242F,
-            M33 = 0.758F,
-            M44 = 1
+            M11 = .567F,
+            M12 = .558F,
+            M21 = .433F,
+            M22 = .442F,
+            M23 = .242F,
+            M33 = .758F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Tritanomaly (Blue-Weak) color blindness.
         /// </summary>
-        public static Matrix4x4 TritanomalyFilter { get; } = new Matrix4x4
+        public static ColorMatrix TritanomalyFilter { get; } = new ColorMatrix
         {
-            M11 = 0.967F,
-            M21 = 0.33F,
-            M22 = 0.733F,
-            M23 = 0.183F,
-            M32 = 0.267F,
-            M33 = 0.817F,
-            M44 = 1
+            M11 = .967F,
+            M21 = .33F,
+            M22 = .733F,
+            M23 = .183F,
+            M32 = .267F,
+            M33 = .817F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets a filter recreating Tritanopia (Blue-Blind) color blindness.
         /// </summary>
-        public static Matrix4x4 TritanopiaFilter { get; } = new Matrix4x4
+        public static ColorMatrix TritanopiaFilter { get; } = new ColorMatrix
         {
-            M11 = 0.95F,
-            M21 = 0.05F,
-            M22 = 0.433F,
-            M23 = 0.475F,
-            M32 = 0.567F,
-            M33 = 0.525F,
-            M44 = 1
+            M11 = .95F,
+            M21 = .05F,
+            M22 = .433F,
+            M23 = .475F,
+            M32 = .567F,
+            M33 = .525F,
+            M44 = 1F
         };
 
         /// <summary>
         /// Gets an approximated black and white filter
         /// </summary>
-        public static Matrix4x4 BlackWhiteFilter { get; } = new Matrix4x4()
+        public static ColorMatrix BlackWhiteFilter { get; } = new ColorMatrix()
         {
             M11 = 1.5F,
             M12 = 1.5F,
@@ -143,24 +152,24 @@ namespace SixLabors.ImageSharp.Processing
             M31 = 1.5F,
             M32 = 1.5F,
             M33 = 1.5F,
-            M41 = -1F,
-            M42 = -1F,
-            M43 = -1F,
-            M44 = 1
+            M44 = 1F,
+            M51 = -1F,
+            M52 = -1F,
+            M53 = -1F,
         };
 
         /// <summary>
         /// Gets a filter recreating an old Kodachrome camera effect.
         /// </summary>
-        public static Matrix4x4 KodachromeFilter { get; } = new Matrix4x4
+        public static ColorMatrix KodachromeFilter { get; } = new ColorMatrix
         {
-            M11 = 0.7297023F,
-            M22 = 0.6109577F,
-            M33 = 0.597218F,
-            M41 = 0.105F,
-            M42 = 0.145F,
-            M43 = 0.155F,
-            M44 = 1
+            M11 = .7297023F,
+            M22 = .6109577F,
+            M33 = .597218F,
+            M44 = 1F,
+            M51 = .105F,
+            M52 = .145F,
+            M53 = .155F,
         }
 
         * CreateSaturateFilter(1.2F) * CreateContrastFilter(1.35F);
@@ -168,15 +177,15 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets a filter recreating an old Lomograph camera effect.
         /// </summary>
-        public static Matrix4x4 LomographFilter { get; } = new Matrix4x4
+        public static ColorMatrix LomographFilter { get; } = new ColorMatrix
         {
             M11 = 1.5F,
             M22 = 1.45F,
             M33 = 1.16F,
-            M41 = -.1F,
-            M42 = -.02F,
-            M43 = -.07F,
-            M44 = 1
+            M44 = 1F,
+            M51 = -.1F,
+            M52 = -.02F,
+            M53 = -.07F,
         }
 
         * CreateSaturateFilter(1.1F) * CreateContrastFilter(1.33F);
@@ -184,21 +193,21 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets a filter recreating an old Polaroid camera effect.
         /// </summary>
-        public static Matrix4x4 PolaroidFilter { get; } = new Matrix4x4
+        public static ColorMatrix PolaroidFilter { get; } = new ColorMatrix
         {
             M11 = 1.538F,
-            M12 = -0.062F,
-            M13 = -0.262F,
-            M21 = -0.022F,
+            M12 = -.062F,
+            M13 = -.262F,
+            M21 = -.022F,
             M22 = 1.578F,
-            M23 = -0.022F,
+            M23 = -.022F,
             M31 = .216F,
             M32 = -.16F,
             M33 = 1.5831F,
-            M41 = 0.02F,
-            M42 = -0.05F,
-            M43 = -0.05F,
-            M44 = 1
+            M44 = 1F,
+            M51 = .02F,
+            M52 = -.05F,
+            M53 = -.05F
         };
 
         /// <summary>
@@ -209,18 +218,18 @@ namespace SixLabors.ImageSharp.Processing
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing brighter results.
         /// </remarks>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateBrightnessFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateBrightnessFilter(float amount)
         {
             Guard.MustBeGreaterThanOrEqualTo(amount, 0, nameof(amount));
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
+            return new ColorMatrix
             {
                 M11 = amount,
                 M22 = amount,
                 M33 = amount,
-                M44 = 1
+                M44 = 1F
             };
         }
 
@@ -232,23 +241,23 @@ namespace SixLabors.ImageSharp.Processing
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing results with more contrast.
         /// </remarks>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateContrastFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateContrastFilter(float amount)
         {
             Guard.MustBeGreaterThanOrEqualTo(amount, 0, nameof(amount));
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
             float contrast = (-.5F * amount) + .5F;
 
-            return new Matrix4x4
+            return new ColorMatrix
             {
                 M11 = amount,
                 M22 = amount,
                 M33 = amount,
-                M41 = contrast,
-                M42 = contrast,
-                M43 = contrast,
-                M44 = 1
+                M44 = 1F,
+                M51 = contrast,
+                M52 = contrast,
+                M53 = contrast
             };
         }
 
@@ -257,26 +266,27 @@ namespace SixLabors.ImageSharp.Processing
         /// <see href="https://en.wikipedia.org/wiki/Luma_%28video%29#Rec._601_luma_versus_Rec._709_luma_coefficients"/>
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateGrayscaleBt601Filter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateGrayscaleBt601Filter(float amount)
         {
-            Guard.MustBeBetweenOrEqualTo(amount, 0, 1, nameof(amount));
+            Guard.MustBeBetweenOrEqualTo(amount, 0, 1F, nameof(amount));
             amount = 1F - amount;
 
-            // https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
-            {
-                M11 = .299F + (.701F * amount),
-                M12 = .299F - (.299F * amount),
-                M13 = .299F - (.299F * amount),
-                M21 = .587F - (.587F * amount),
-                M22 = .587F + (.413F * amount),
-                M23 = .587F - (.587F * amount),
-                M31 = .114F - (.114F * amount),
-                M32 = .114F - (.114F * amount),
-                M33 = .114F + (.886F * amount),
-                M44 = 1
-            };
+            ColorMatrix m = default;
+            m.M11 = .299F + (.701F * amount);
+            m.M21 = .587F - (.587F * amount);
+            m.M31 = 1F - (m.M11 + m.M21);
+
+            m.M12 = .299F - (.299F * amount);
+            m.M22 = .587F + (.2848F * amount);
+            m.M32 = 1F - (m.M12 + m.M22);
+
+            m.M13 = .299F - (.299F * amount);
+            m.M23 = .587F - (.587F * amount);
+            m.M33 = 1F - (m.M13 + m.M23);
+            m.M44 = 1F;
+
+            return m;
         }
 
         /// <summary>
@@ -284,34 +294,36 @@ namespace SixLabors.ImageSharp.Processing
         /// <see href="https://en.wikipedia.org/wiki/Rec._709#Luma_coefficients"/>
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateGrayscaleBt709Filter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateGrayscaleBt709Filter(float amount)
         {
-            Guard.MustBeBetweenOrEqualTo(amount, 0, 1, nameof(amount));
+            Guard.MustBeBetweenOrEqualTo(amount, 0, 1F, nameof(amount));
             amount = 1F - amount;
 
             // https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
-            {
-                M11 = .2126F + (.7874F * amount),
-                M12 = .2126F - (.2126F * amount),
-                M13 = .2126F - (.2126F * amount),
-                M21 = .7152F - (.7152F * amount),
-                M22 = .7152F + (.2848F * amount),
-                M23 = .7152F - (.7152F * amount),
-                M31 = .0722F - (.0722F * amount),
-                M32 = .0722F - (.0722F * amount),
-                M33 = .0722F + (.9278F * amount),
-                M44 = 1
-            };
+            ColorMatrix m = default;
+            m.M11 = .2126F + (.7874F * amount);
+            m.M21 = .7152F - (.7152F * amount);
+            m.M31 = 1F - (m.M11 + m.M21);
+
+            m.M12 = .2126F - (.2126F * amount);
+            m.M22 = .7152F + (.2848F * amount);
+            m.M32 = 1F - (m.M12 + m.M22);
+
+            m.M13 = .2126F - (.2126F * amount);
+            m.M23 = .7152F - (.7152F * amount);
+            m.M33 = 1F - (m.M13 + m.M23);
+            m.M44 = 1F;
+
+            return m;
         }
 
         /// <summary>
         /// Create a hue filter matrix using the given angle in degrees.
         /// </summary>
         /// <param name="degrees">The angle of rotation in degrees.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateHueFilter(float degrees)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateHueFilter(float degrees)
         {
             // Wrap the angle round at 360.
             degrees %= 360;
@@ -329,18 +341,20 @@ namespace SixLabors.ImageSharp.Processing
             // The matrix is set up to preserve the luminance of the image.
             // See http://graficaobscura.com/matrix/index.html
             // Number are taken from https://msdn.microsoft.com/en-us/library/jj192162(v=vs.85).aspx
-            return new Matrix4x4
+            return new ColorMatrix
             {
                 M11 = .213F + (cosRadian * .787F) - (sinRadian * .213F),
-                M12 = .213F - (cosRadian * .213F) - (sinRadian * 0.143F),
-                M13 = .213F - (cosRadian * .213F) - (sinRadian * .787F),
                 M21 = .715F - (cosRadian * .715F) - (sinRadian * .715F),
-                M22 = .715F + (cosRadian * .285F) + (sinRadian * 0.140F),
-                M23 = .715F - (cosRadian * .715F) + (sinRadian * .715F),
                 M31 = .072F - (cosRadian * .072F) + (sinRadian * .928F),
-                M32 = .072F - (cosRadian * .072F) - (sinRadian * 0.283F),
+
+                M12 = .213F - (cosRadian * .213F) + (sinRadian * .143F),
+                M22 = .715F + (cosRadian * .285F) + (sinRadian * .140F),
+                M32 = .072F - (cosRadian * .072F) - (sinRadian * .283F),
+
+                M13 = .213F - (cosRadian * .213F) - (sinRadian * .787F),
+                M23 = .715F - (cosRadian * .715F) + (sinRadian * .715F),
                 M33 = .072F + (cosRadian * .928F) + (sinRadian * .072F),
-                M44 = 1
+                M44 = 1F
             };
         }
 
@@ -348,23 +362,23 @@ namespace SixLabors.ImageSharp.Processing
         /// Create an invert filter matrix using the given amount.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateInvertFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateInvertFilter(float amount)
         {
             Guard.MustBeBetweenOrEqualTo(amount, 0, 1, nameof(amount));
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
             float invert = 1F - (2F * amount);
 
-            return new Matrix4x4
+            return new ColorMatrix
             {
                 M11 = invert,
                 M22 = invert,
                 M33 = invert,
-                M41 = amount,
-                M42 = amount,
-                M43 = amount,
-                M44 = 1
+                M44 = 1F,
+                M51 = amount,
+                M52 = amount,
+                M53 = amount,
             };
         }
 
@@ -372,17 +386,17 @@ namespace SixLabors.ImageSharp.Processing
         /// Create an opacity filter matrix using the given amount.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateOpacityFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateOpacityFilter(float amount)
         {
             Guard.MustBeBetweenOrEqualTo(amount, 0, 1, nameof(amount));
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
+            return new ColorMatrix
             {
-                M11 = 1,
-                M22 = 1,
-                M33 = 1,
+                M11 = 1F,
+                M22 = 1F,
+                M33 = 1F,
                 M44 = amount
             };
         }
@@ -395,25 +409,27 @@ namespace SixLabors.ImageSharp.Processing
         /// Other values are linear multipliers on the effect. Values of amount over 1 are allowed, providing super-saturated results
         /// </remarks>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateSaturateFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateSaturateFilter(float amount)
         {
             Guard.MustBeGreaterThanOrEqualTo(amount, 0, nameof(amount));
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
-            {
-                M11 = .213F + (.787F * amount),
-                M12 = .213F - (.213F * amount),
-                M13 = .213F - (.213F * amount),
-                M21 = .715F - (.715F * amount),
-                M22 = .715F + (.285F * amount),
-                M23 = .715F - (.715F * amount),
-                M31 = 1F - ((.213F + (.787F * amount)) + (.715F - (.715F * amount))),
-                M32 = 1F - ((.213F - (.213F * amount)) + (.715F + (.285F * amount))),
-                M33 = 1F - ((.213F - (.213F * amount)) + (.715F - (.715F * amount))),
-                M44 = 1
-            };
+            ColorMatrix m = default;
+            m.M11 = .213F + (.787F * amount);
+            m.M21 = .715F - (.715F * amount);
+            m.M31 = 1F - (m.M11 + m.M21);
+
+            m.M12 = .213F - (.213F * amount);
+            m.M22 = .715F + (.285F * amount);
+            m.M32 = 1F - (m.M12 + m.M22);
+
+            m.M13 = .213F - (.213F * amount);
+            m.M23 = .715F - (.715F * amount);
+            m.M33 = 1F - (m.M13 + m.M23);
+            m.M44 = 1F;
+
+            return m;
         }
 
         /// <summary>
@@ -421,25 +437,27 @@ namespace SixLabors.ImageSharp.Processing
         /// The formula used matches the svg specification. <see href="http://www.w3.org/TR/filter-effects/#sepiaEquivalent"/>
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Matrix4x4"/></returns>
-        public static Matrix4x4 CreateSepiaFilter(float amount)
+        /// <returns>The <see cref="ColorMatrix"/></returns>
+        public static ColorMatrix CreateSepiaFilter(float amount)
         {
             Guard.MustBeBetweenOrEqualTo(amount, 0, 1, nameof(amount));
             amount = 1F - amount;
 
             // See https://cs.chromium.org/chromium/src/cc/paint/render_surface_filters.cc
-            return new Matrix4x4
+            return new ColorMatrix
             {
                 M11 = .393F + (.607F * amount),
-                M12 = .349F - (.349F * amount),
-                M13 = .272F - (.272F * amount),
                 M21 = .769F - (.769F * amount),
-                M22 = .686F + (.314F * amount),
-                M23 = .534F - (.534F * amount),
                 M31 = .189F - (.189F * amount),
+
+                M12 = .349F - (.349F * amount),
+                M22 = .686F + (.314F * amount),
                 M32 = .168F - (.168F * amount),
+
+                M13 = .272F - (.272F * amount),
+                M23 = .534F - (.534F * amount),
                 M33 = .131F + (.869F * amount),
-                M44 = 1
+                M44 = 1F
             };
         }
     }
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index d3a44c066e..d6a32d8899 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -3,16 +3,16 @@
 
 using System;
 using System.Numerics;
-using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
-    /// Provides methods that accept a <see cref="Matrix4x4"/> matrix to apply free-form filters to images.
+    /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
     internal class FilterProcessor<TPixel> : ImageProcessor<TPixel>
@@ -22,38 +22,36 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// Initializes a new instance of the <see cref="FilterProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="matrix">The matrix used to apply the image filter</param>
-        public FilterProcessor(Matrix4x4 matrix)
-        {
-            this.Matrix = matrix;
-        }
+        public FilterProcessor(ColorMatrix matrix) => this.Matrix = matrix;
 
         /// <summary>
-        /// Gets the <see cref="Matrix4x4"/> used to apply the image filter.
+        /// Gets the <see cref="ColorMatrix"/> used to apply the image filter.
         /// </summary>
-        public Matrix4x4 Matrix { get; }
+        public ColorMatrix Matrix { get; }
 
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
             var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startX = interest.X;
 
-            Matrix4x4 matrix = this.Matrix;
+            ColorMatrix matrix = this.Matrix;
 
-            ParallelHelper.IterateRows(
+            ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
                 interest,
                 configuration,
-                rows =>
+                (rows, vectorBuffer) =>
                     {
                         for (int y = rows.Min; y < rows.Max; y++)
                         {
-                            Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                            for (int x = interest.X; x < interest.Right; x++)
-                            {
-                                ref TPixel pixel = ref row[x];
-                                var vector = Vector4.Transform(pixel.ToVector4(), matrix);
-                                pixel.FromVector4(vector);
-                            }
+                            Span<Vector4> vectorSpan = vectorBuffer.Span;
+                            int length = vectorSpan.Length;
+                            Span<TPixel> rowSpan = source.GetPixelRowSpan(y).Slice(startX, length);
+                            PixelOperations<TPixel>.Instance.ToVector4(configuration, rowSpan, vectorSpan);
+
+                            Vector4Utils.Transform(vectorSpan, ref matrix);
+
+                            PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan, rowSpan);
                         }
                     });
         }
diff --git a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
index 158a085d5a..aed1edfbf0 100644
--- a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
+++ b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
@@ -57,8 +57,7 @@ namespace SixLabors.ImageSharp.Tests
             {
                 using (Image<Rgba32> image = file.CreateImage())
                 {
-                    var encoder = new PngEncoder { Quantizer = new WuQuantizer(KnownDiffusers.JarvisJudiceNinke, 256), ColorType = PngColorType.Palette };
-                    image.Save($"{path}/{file.FileName}.png", encoder);
+                    image.Save($"{path}/{file.FileName}");
                 }
             }
         }
diff --git a/tests/ImageSharp.Tests/Helpers/Vector4UtilsTests.cs b/tests/ImageSharp.Tests/Helpers/Vector4UtilsTests.cs
index 9416be740a..f2e98b131a 100644
--- a/tests/ImageSharp.Tests/Helpers/Vector4UtilsTests.cs
+++ b/tests/ImageSharp.Tests/Helpers/Vector4UtilsTests.cs
@@ -11,6 +11,8 @@ namespace SixLabors.ImageSharp.Tests.Helpers
 {
     public class Vector4UtilsTests
     {
+        private readonly ApproximateFloatComparer ApproximateFloatComparer = new ApproximateFloatComparer(1e-6f);
+
         [Theory]
         [InlineData(0)]
         [InlineData(1)]
@@ -23,7 +25,7 @@ namespace SixLabors.ImageSharp.Tests.Helpers
 
             Vector4Utils.Premultiply(source);
 
-            Assert.Equal(expected, source, new ApproximateFloatComparer(1e-6f));
+            Assert.Equal(expected, source, this.ApproximateFloatComparer);
         }
 
         [Theory]
@@ -38,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Helpers
 
             Vector4Utils.UnPremultiply(source);
 
-            Assert.Equal(expected, source, new ApproximateFloatComparer(1e-6f));
+            Assert.Equal(expected, source, this.ApproximateFloatComparer);
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/Primitives/ColorMatrixTests.cs b/tests/ImageSharp.Tests/Primitives/ColorMatrixTests.cs
new file mode 100644
index 0000000000..2fbe260ecd
--- /dev/null
+++ b/tests/ImageSharp.Tests/Primitives/ColorMatrixTests.cs
@@ -0,0 +1,270 @@
+using System;
+using System.Globalization;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.ImageSharp.Processing;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Primitives
+{
+    public class ColorMatrixTests
+    {
+        private readonly ApproximateFloatComparer ApproximateFloatComparer = new ApproximateFloatComparer(1e-6f);
+
+        [Fact]
+        public void ColorMatrixIdentityIsCorrect()
+        {
+            ColorMatrix val = default;
+            val.M11 = val.M22 = val.M33 = val.M44 = 1F;
+
+            Assert.Equal(val, ColorMatrix.Identity, this.ApproximateFloatComparer);
+        }
+
+        [Fact]
+        public void ColorMatrixCanDetectIdentity()
+        {
+            ColorMatrix m = ColorMatrix.Identity;
+            Assert.True(m.IsIdentity);
+
+            m.M12 = 1F;
+            Assert.False(m.IsIdentity);
+        }
+
+        [Fact]
+        public void ColorMatrixEquality()
+        {
+            ColorMatrix m = KnownFilterMatrices.CreateHueFilter(45F);
+            ColorMatrix m2 = KnownFilterMatrices.CreateHueFilter(45F);
+            object obj = m2;
+
+            Assert.True(m.Equals(obj));
+            Assert.True(m.Equals(m2));
+            Assert.True(m == m2);
+            Assert.False(m != m2);
+        }
+
+        [Fact]
+        public void ColorMatrixMultiply()
+        {
+            ColorMatrix value1 = this.CreateAllTwos();
+            ColorMatrix value2 = this.CreateAllThrees();
+
+            ColorMatrix m;
+
+            // First row
+            m.M11 = (value1.M11 * value2.M11) + (value1.M12 * value2.M21) + (value1.M13 * value2.M31) + (value1.M14 * value2.M41);
+            m.M12 = (value1.M11 * value2.M12) + (value1.M12 * value2.M22) + (value1.M13 * value2.M32) + (value1.M14 * value2.M42);
+            m.M13 = (value1.M11 * value2.M13) + (value1.M12 * value2.M23) + (value1.M13 * value2.M33) + (value1.M14 * value2.M43);
+            m.M14 = (value1.M11 * value2.M14) + (value1.M12 * value2.M24) + (value1.M13 * value2.M34) + (value1.M14 * value2.M44);
+
+            // Second row
+            m.M21 = (value1.M21 * value2.M11) + (value1.M22 * value2.M21) + (value1.M23 * value2.M31) + (value1.M24 * value2.M41);
+            m.M22 = (value1.M21 * value2.M12) + (value1.M22 * value2.M22) + (value1.M23 * value2.M32) + (value1.M24 * value2.M42);
+            m.M23 = (value1.M21 * value2.M13) + (value1.M22 * value2.M23) + (value1.M23 * value2.M33) + (value1.M24 * value2.M43);
+            m.M24 = (value1.M21 * value2.M14) + (value1.M22 * value2.M24) + (value1.M23 * value2.M34) + (value1.M24 * value2.M44);
+
+            // Third row
+            m.M31 = (value1.M31 * value2.M11) + (value1.M32 * value2.M21) + (value1.M33 * value2.M31) + (value1.M34 * value2.M41);
+            m.M32 = (value1.M31 * value2.M12) + (value1.M32 * value2.M22) + (value1.M33 * value2.M32) + (value1.M34 * value2.M42);
+            m.M33 = (value1.M31 * value2.M13) + (value1.M32 * value2.M23) + (value1.M33 * value2.M33) + (value1.M34 * value2.M43);
+            m.M34 = (value1.M31 * value2.M14) + (value1.M32 * value2.M24) + (value1.M33 * value2.M34) + (value1.M34 * value2.M44);
+
+            // Fourth row
+            m.M41 = (value1.M41 * value2.M11) + (value1.M42 * value2.M21) + (value1.M43 * value2.M31) + (value1.M44 * value2.M41);
+            m.M42 = (value1.M41 * value2.M12) + (value1.M42 * value2.M22) + (value1.M43 * value2.M32) + (value1.M44 * value2.M42);
+            m.M43 = (value1.M41 * value2.M13) + (value1.M42 * value2.M23) + (value1.M43 * value2.M33) + (value1.M44 * value2.M43);
+            m.M44 = (value1.M41 * value2.M14) + (value1.M42 * value2.M24) + (value1.M43 * value2.M34) + (value1.M44 * value2.M44);
+
+            // Fifth row
+            m.M51 = (value1.M51 * value2.M11) + (value1.M52 * value2.M21) + (value1.M53 * value2.M31) + (value1.M54 * value2.M41) + value2.M51;
+            m.M52 = (value1.M51 * value2.M12) + (value1.M52 * value2.M22) + (value1.M53 * value2.M32) + (value1.M54 * value2.M52) + value2.M52;
+            m.M53 = (value1.M51 * value2.M13) + (value1.M52 * value2.M23) + (value1.M53 * value2.M33) + (value1.M54 * value2.M53) + value2.M53;
+            m.M54 = (value1.M51 * value2.M14) + (value1.M52 * value2.M24) + (value1.M53 * value2.M34) + (value1.M54 * value2.M54) + value2.M54;
+
+            Assert.Equal(m, value1 * value2, this.ApproximateFloatComparer);
+        }
+
+        [Fact]
+        public void ColorMatrixMultiplyScalar()
+        {
+            ColorMatrix m = this.CreateAllTwos();
+            Assert.Equal(this.CreateAllFours(), m * 2, this.ApproximateFloatComparer);
+        }
+
+        [Fact]
+        public void ColorMatrixSubtract()
+        {
+            ColorMatrix m = this.CreateAllOnes() + this.CreateAllTwos();
+            Assert.Equal(this.CreateAllThrees(), m);
+        }
+
+        [Fact]
+        public void ColorMatrixNegate()
+        {
+            ColorMatrix m = this.CreateAllOnes() * -1F;
+            Assert.Equal(m, -this.CreateAllOnes());
+        }
+
+        [Fact]
+        public void ColorMatrixAdd()
+        {
+            ColorMatrix m = this.CreateAllOnes() + this.CreateAllTwos();
+            Assert.Equal(this.CreateAllThrees(), m);
+        }
+
+        [Fact]
+        public void ColorMatrixHashCode()
+        {
+#if NETCOREAPP2_1
+            ColorMatrix m = KnownFilterMatrices.CreateBrightnessFilter(.5F);
+            HashCode hash = default;
+            hash.Add(m.M11);
+            hash.Add(m.M12);
+            hash.Add(m.M13);
+            hash.Add(m.M14);
+            hash.Add(m.M21);
+            hash.Add(m.M22);
+            hash.Add(m.M23);
+            hash.Add(m.M24);
+            hash.Add(m.M31);
+            hash.Add(m.M32);
+            hash.Add(m.M33);
+            hash.Add(m.M34);
+            hash.Add(m.M41);
+            hash.Add(m.M42);
+            hash.Add(m.M43);
+            hash.Add(m.M44);
+            hash.Add(m.M51);
+            hash.Add(m.M52);
+            hash.Add(m.M53);
+            hash.Add(m.M54);
+
+            Assert.Equal(hash.ToHashCode(), m.GetHashCode());
+#endif
+        }
+
+        [Fact]
+        public void ColorMatrixToString()
+        {
+            ColorMatrix m = KnownFilterMatrices.CreateBrightnessFilter(.5F);
+
+            CultureInfo ci = CultureInfo.CurrentCulture;
+
+            string expected = string.Format(ci, "{{ {{M11:{0} M12:{1} M13:{2} M14:{3}}} {{M21:{4} M22:{5} M23:{6} M24:{7}}} {{M31:{8} M32:{9} M33:{10} M34:{11}}} {{M41:{12} M42:{13} M43:{14} M44:{15}}} {{M51:{16} M52:{17} M53:{18} M54:{19}}} }}",
+                                 m.M11.ToString(ci), m.M12.ToString(ci), m.M13.ToString(ci), m.M14.ToString(ci),
+                                 m.M21.ToString(ci), m.M22.ToString(ci), m.M23.ToString(ci), m.M24.ToString(ci),
+                                 m.M31.ToString(ci), m.M32.ToString(ci), m.M33.ToString(ci), m.M34.ToString(ci),
+                                 m.M41.ToString(ci), m.M42.ToString(ci), m.M43.ToString(ci), m.M44.ToString(ci),
+                                 m.M51.ToString(ci), m.M52.ToString(ci), m.M53.ToString(ci), m.M54.ToString(ci));
+
+            Assert.Equal(expected, m.ToString());
+        }
+
+        private ColorMatrix CreateAllOnes()
+        {
+            return new ColorMatrix
+            {
+                M11 = 1F,
+                M12 = 1F,
+                M13 = 1F,
+                M14 = 1F,
+                M21 = 1F,
+                M22 = 1F,
+                M23 = 1F,
+                M24 = 1F,
+                M31 = 1F,
+                M32 = 1F,
+                M33 = 1F,
+                M34 = 1F,
+                M41 = 1F,
+                M42 = 1F,
+                M43 = 1F,
+                M44 = 1F,
+                M51 = 1F,
+                M52 = 1F,
+                M53 = 1F,
+                M54 = 1F
+            };
+        }
+
+        private ColorMatrix CreateAllTwos()
+        {
+            return new ColorMatrix
+            {
+                M11 = 2F,
+                M12 = 2F,
+                M13 = 2F,
+                M14 = 2F,
+                M21 = 2F,
+                M22 = 2F,
+                M23 = 2F,
+                M24 = 2F,
+                M31 = 2F,
+                M32 = 2F,
+                M33 = 2F,
+                M34 = 2F,
+                M41 = 2F,
+                M42 = 2F,
+                M43 = 2F,
+                M44 = 2F,
+                M51 = 2F,
+                M52 = 2F,
+                M53 = 2F,
+                M54 = 2F
+            };
+        }
+
+        private ColorMatrix CreateAllThrees()
+        {
+            return new ColorMatrix
+            {
+                M11 = 3F,
+                M12 = 3F,
+                M13 = 3F,
+                M14 = 3F,
+                M21 = 3F,
+                M22 = 3F,
+                M23 = 3F,
+                M24 = 3F,
+                M31 = 3F,
+                M32 = 3F,
+                M33 = 3F,
+                M34 = 3F,
+                M41 = 3F,
+                M42 = 3F,
+                M43 = 3F,
+                M44 = 3F,
+                M51 = 3F,
+                M52 = 3F,
+                M53 = 3F,
+                M54 = 3F
+            };
+        }
+
+        private ColorMatrix CreateAllFours()
+        {
+            return new ColorMatrix
+            {
+                M11 = 4F,
+                M12 = 4F,
+                M13 = 4F,
+                M14 = 4F,
+                M21 = 4F,
+                M22 = 4F,
+                M23 = 4F,
+                M24 = 4F,
+                M31 = 4F,
+                M32 = 4F,
+                M33 = 4F,
+                M34 = 4F,
+                M41 = 4F,
+                M42 = 4F,
+                M43 = 4F,
+                M44 = 4F,
+                M51 = 4F,
+                M52 = 4F,
+                M53 = 4F,
+                M54 = 4F
+            };
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
index ed790cbac8..54a8dd4b7d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
@@ -8,10 +8,13 @@ using Xunit;
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
 {
     using SixLabors.ImageSharp.Processing;
+    using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
     [GroupOutput("Filters")]
     public class BrightnessTest
     {
+        private readonly ImageComparer imageComparer = ImageComparer.Tolerant(0.007F);
+
         public static readonly TheoryData<float> BrightnessValues
         = new TheoryData<float>
         {
@@ -22,9 +25,6 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         [Theory]
         [WithTestPatternImages(nameof(BrightnessValues), 48, 48, PixelTypes.Rgba32)]
         public void ApplyBrightnessFilter<TPixel>(TestImageProvider<TPixel> provider, float value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            provider.RunValidatingProcessorTest(ctx => ctx.Brightness(value), value);
-        }
+            where TPixel : struct, IPixel<TPixel> => provider.RunValidatingProcessorTest(ctx => ctx.Brightness(value), value, this.imageComparer);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
index 3d48e16ec9..8ac56655ea 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
@@ -2,17 +2,19 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
 
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
 {
     using SixLabors.ImageSharp.Processing;
+    using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
     [GroupOutput("Filters")]
     public class ColorBlindnessTest
     {
+        private readonly ImageComparer imageComparer = ImageComparer.Tolerant(0.03F);
+
         public static readonly TheoryData<ColorBlindnessMode> ColorBlindnessFilters
         = new TheoryData<ColorBlindnessMode>
         {
@@ -29,9 +31,6 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         [Theory]
         [WithTestPatternImages(nameof(ColorBlindnessFilters), 48, 48, PixelTypes.Rgba32)]
         public void ApplyColorBlindnessFilter<TPixel>(TestImageProvider<TPixel> provider, ColorBlindnessMode colorBlindness)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            provider.RunValidatingProcessorTest(x => x.ColorBlindness(colorBlindness), colorBlindness.ToString());
-        }
+            where TPixel : struct, IPixel<TPixel> => provider.RunValidatingProcessorTest(x => x.ColorBlindness(colorBlindness), colorBlindness.ToString(), this.imageComparer);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
index 479a3c33a2..68daa80eac 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
@@ -1,16 +1,13 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
 {
+    using SixLabors.ImageSharp.Primitives;
     using SixLabors.ImageSharp.Processing;
 
     [GroupOutput("Filters")]
@@ -25,7 +22,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         public void ApplyFilter<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            Matrix4x4 m = CreateCombinedTestFilterMatrix();
+            ColorMatrix m = CreateCombinedTestFilterMatrix();
 
             provider.RunValidatingProcessorTest(x => x.Filter(m), comparer: ValidatorComparer);
         }
@@ -35,18 +32,17 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         public void ApplyFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            Matrix4x4 m = CreateCombinedTestFilterMatrix();
+            ColorMatrix m = CreateCombinedTestFilterMatrix();
 
             provider.RunRectangleConstrainedValidatingProcessorTest((x, b) => x.Filter(m, b), comparer: ValidatorComparer);
         }
 
-        private static Matrix4x4 CreateCombinedTestFilterMatrix()
+        private static ColorMatrix CreateCombinedTestFilterMatrix()
         {
-            Matrix4x4 brightness = KnownFilterMatrices.CreateBrightnessFilter(0.9F);
-            Matrix4x4 hue = KnownFilterMatrices.CreateHueFilter(180F);
-            Matrix4x4 saturation = KnownFilterMatrices.CreateSaturateFilter(1.5F);
-            Matrix4x4 m = brightness * hue * saturation;
-            return m;
+            ColorMatrix brightness = KnownFilterMatrices.CreateBrightnessFilter(0.9F);
+            ColorMatrix hue = KnownFilterMatrices.CreateHueFilter(180F);
+            ColorMatrix saturation = KnownFilterMatrices.CreateSaturateFilter(1.5F);
+            return brightness * hue * saturation;
         }
 
     }
diff --git a/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs b/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
index 47ca6cccb2..872a935ffe 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.Numerics;
+using SixLabors.ImageSharp.Primitives;
 
 namespace SixLabors.ImageSharp.Tests
 {
@@ -11,8 +12,9 @@ namespace SixLabors.ImageSharp.Tests
     /// </summary>
     internal readonly struct ApproximateFloatComparer :
         IEqualityComparer<float>,
+        IEqualityComparer<Vector2>,
         IEqualityComparer<Vector4>,
-        IEqualityComparer<Vector2>
+        IEqualityComparer<ColorMatrix>
     {
         private readonly float Epsilon;
 
@@ -20,7 +22,7 @@ namespace SixLabors.ImageSharp.Tests
         /// Initializes a new instance of the <see cref="ApproximateFloatComparer"/> class.
         /// </summary>
         /// <param name="epsilon">The comparison error difference epsilon to use.</param>
-        public ApproximateFloatComparer(float epsilon = 1f) => this.Epsilon = epsilon;
+        public ApproximateFloatComparer(float epsilon = 1F) => this.Epsilon = epsilon;
 
         /// <inheritdoc/>
         public bool Equals(float x, float y)
@@ -34,17 +36,29 @@ namespace SixLabors.ImageSharp.Tests
         public int GetHashCode(float obj) => obj.GetHashCode();
 
         /// <inheritdoc/>
-        public bool Equals(Vector4 a, Vector4 b) => this.Equals(a.X, b.X) && this.Equals(a.Y, b.Y) && this.Equals(a.Z, b.Z) && this.Equals(a.W, b.W);
+        public bool Equals(Vector2 x, Vector2 y) => this.Equals(x.X, y.X) && this.Equals(x.Y, y.Y);
 
         /// <inheritdoc/>
-        public int GetHashCode(Vector4 obj) => obj.GetHashCode();
+        public int GetHashCode(Vector2 obj) => obj.GetHashCode();
+
+        /// <inheritdoc/>
+        public bool Equals(Vector4 x, Vector4 y) => this.Equals(x.X, y.X) && this.Equals(x.Y, y.Y) && this.Equals(x.Z, y.Z) && this.Equals(x.W, y.W);
 
         /// <inheritdoc/>
-        public bool Equals(Vector2 a, Vector2 b) => this.Equals(a.X, b.X) && this.Equals(a.Y, b.Y);
+        public int GetHashCode(Vector4 obj) => obj.GetHashCode();
 
-        public int GetHashCode(Vector2 obj)
+        /// <inheritdoc/>
+        public bool Equals(ColorMatrix x, ColorMatrix y)
         {
-            throw new System.NotImplementedException();
+            return
+            this.Equals(x.M11, y.M11) && this.Equals(x.M12, y.M12) && this.Equals(x.M13, y.M13) && this.Equals(x.M14, y.M14)
+            && this.Equals(x.M21, y.M21) && this.Equals(x.M22, y.M22) && this.Equals(x.M23, y.M23) && this.Equals(x.M24, y.M24)
+            && this.Equals(x.M31, y.M31) && this.Equals(x.M32, y.M32) && this.Equals(x.M33, y.M33) && this.Equals(x.M34, y.M34)
+            && this.Equals(x.M41, y.M41) && this.Equals(x.M42, y.M42) && this.Equals(x.M43, y.M43) && this.Equals(x.M44, y.M44)
+            && this.Equals(x.M51, y.M51) && this.Equals(x.M52, y.M52) && this.Equals(x.M53, y.M53) && this.Equals(x.M54, y.M54);
         }
+
+        /// <inheritdoc/>
+        public int GetHashCode(ColorMatrix obj) => obj.GetHashCode();
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 7ada45bc34..74995302e3 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 7ada45bc3484f40e28a50817386ca93f293acd11
+Subproject commit 74995302e3c9a5913f1cf09d71b15f888d0ec022

From 84ba4bbf0d20d711b0d65e6983bfec165f220388 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Fri, 18 Jan 2019 08:11:55 +0100
Subject: [PATCH 012/223] Decoding Bitmaps with BITFIELDS masks (#796)

* decoding bitmaps with Bitfields masks

* added testcases for Bitfields bitmaps

* added parsing of the complete bitmap V4 header to get the color masks infos for the BITFIELDS compression

* writing now explicitly a Bitamp v3 header (40 bytes)

* added test image for issue #735

* fixed rescaling 5-bit / 6-bit to 0 - 255 range

* BitmapEncoder now writes BMP v4 header

* using MemoryMarshal.Cast to simplify parsing v4 header

* added testcases for bitmap v3, v4, v5

* Bitmap encoder writes again V3 header instead of V4. Additional fields for V4 are zero anyway.

* added parsing of special case for 56 bytes headers

* using the alpha mask in ReadRgb32BitFields() when its present

* added support for bitmasks greater then 8 bits per channel

* using MagickReferenceDecoder reference decoder for the test with 10 bits pixel masks

* changed bitmap constants to hex

* added enum for the bitmap info header type

* added support for 52 bytes header (same as 56 bytes without the alpha mask)

* clarified comment with difference between imagesharp and magick decoder for Rgba321010102

* BmpEncoder now writes a V4 info header and uses BITFIELDS compression

* workaround for issue that the decoder does not decode the alpha channel correctly: For V3 bitmaps, the alpha channel will be ignored during encoding

* Fix #732
---
 src/ImageSharp/Formats/Bmp/BmpCompression.cs  |   2 -
 src/ImageSharp/Formats/Bmp/BmpConstants.cs    |  36 ++
 src/ImageSharp/Formats/Bmp/BmpDecoder.cs      |   2 -
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 399 ++++++++++++++++--
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  |  50 ++-
 src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs   | 252 ++++++++++-
 .../Formats/Bmp/BmpInfoHeaderType.cs          |  48 +++
 src/ImageSharp/Formats/Bmp/BmpMetaData.cs     |  11 +-
 .../Formats/Bmp/BmpDecoderTests.cs            | 107 ++++-
 tests/ImageSharp.Tests/TestImages.cs          |  29 +-
 tests/Images/Input/Bmp/issue735.bmp           |   3 +
 tests/Images/Input/Bmp/pal8v4.bmp             |   3 +
 tests/Images/Input/Bmp/pal8v5.bmp             |   3 +
 tests/Images/Input/Bmp/rgb16-565.bmp          |   3 +
 tests/Images/Input/Bmp/rgb16-565pal.bmp       |   3 +
 tests/Images/Input/Bmp/rgb16bfdef.bmp         |   3 +
 tests/Images/Input/Bmp/rgb24.bmp              |   3 +
 tests/Images/Input/Bmp/rgb32bf.bmp            |   3 +
 tests/Images/Input/Bmp/rgb32bfdef.bmp         |   3 +
 tests/Images/Input/Bmp/rgba32-1010102.bmp     |   3 +
 tests/Images/Input/Bmp/rgba32.bmp             |   3 +
 tests/Images/Input/Bmp/rgba32h56.bmp          |   3 +
 22 files changed, 895 insertions(+), 77 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
 create mode 100644 tests/Images/Input/Bmp/issue735.bmp
 create mode 100644 tests/Images/Input/Bmp/pal8v4.bmp
 create mode 100644 tests/Images/Input/Bmp/pal8v5.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb16-565.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb16-565pal.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb16bfdef.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb24.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb32bf.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb32bfdef.bmp
 create mode 100644 tests/Images/Input/Bmp/rgba32-1010102.bmp
 create mode 100644 tests/Images/Input/Bmp/rgba32.bmp
 create mode 100644 tests/Images/Input/Bmp/rgba32h56.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpCompression.cs b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
index ef063f0106..5f14d22436 100644
--- a/src/ImageSharp/Formats/Bmp/BmpCompression.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
@@ -25,7 +25,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// If the first byte is zero, the record has different meanings, depending
         /// on the second byte. If the second byte is zero, it is the end of the row,
         /// if it is one, it is the end of the image.
-        /// Not supported at the moment.
         /// </summary>
         RLE8 = 1,
 
@@ -42,7 +41,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <summary>
         /// Each image row has a multiple of four elements. If the
         /// row has less elements, zeros will be added at the right side.
-        /// Not supported at the moment.
         /// </summary>
         BitFields = 3,
 
diff --git a/src/ImageSharp/Formats/Bmp/BmpConstants.cs b/src/ImageSharp/Formats/Bmp/BmpConstants.cs
index 99799b619c..5cbed4af2b 100644
--- a/src/ImageSharp/Formats/Bmp/BmpConstants.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpConstants.cs
@@ -19,5 +19,41 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// The list of file extensions that equate to a bmp.
         /// </summary>
         public static readonly IEnumerable<string> FileExtensions = new[] { "bm", "bmp", "dip" };
+
+        /// <summary>
+        /// Valid magic bytes markers identifying a Bitmap file.
+        /// </summary>
+        internal static class TypeMarkers
+        {
+            /// <summary>
+            /// Single-image BMP file that may have been created under Windows or OS/2.
+            /// </summary>
+            public const int Bitmap = 0x4D42;
+
+            /// <summary>
+            /// OS/2 Bitmap Array.
+            /// </summary>
+            public const int BitmapArray = 0x4142;
+
+            /// <summary>
+            /// OS/2 Color Icon.
+            /// </summary>
+            public const int ColorIcon = 0x4943;
+
+            /// <summary>
+            /// OS/2 Color Pointer.
+            /// </summary>
+            public const int ColorPointer = 0x5043;
+
+            /// <summary>
+            /// OS/2 Icon.
+            /// </summary>
+            public const int Icon = 0x4349;
+
+            /// <summary>
+            /// OS/2 Pointer.
+            /// </summary>
+            public const int Pointer = 0x5450;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
index 3d079cf619..82af2a671e 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
@@ -15,8 +15,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     ///    <item>JPG</item>
     ///    <item>PNG</item>
     ///    <item>RLE4</item>
-    ///    <item>RLE8</item>
-    ///    <item>BitFields</item>
     /// </list>
     /// Formats will be supported in a later releases. We advise always
     /// to use only 24 Bit Windows bitmaps.
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 68528edcd6..362fe64430 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -2,8 +2,10 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Buffers.Binary;
 using System.IO;
+using System.Numerics;
 using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Memory;
@@ -14,7 +16,7 @@ using SixLabors.Memory;
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
-    /// Performs the bmp decoding operation.
+    /// Performs the bitmap decoding operation.
     /// </summary>
     /// <remarks>
     /// A useful decoding source example can be found at <see href="https://dxr.mozilla.org/mozilla-central/source/image/decoders/nsBMPDecoder.cpp"/>
@@ -22,19 +24,19 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     internal sealed class BmpDecoderCore
     {
         /// <summary>
-        /// The mask for the red part of the color for 16 bit rgb bitmaps.
+        /// The default mask for the red part of the color for 16 bit rgb bitmaps.
         /// </summary>
-        private const int Rgb16RMask = 0x7C00;
+        private const int DefaultRgb16RMask = 0x7C00;
 
         /// <summary>
-        /// The mask for the green part of the color for 16 bit rgb bitmaps.
+        /// The default mask for the green part of the color for 16 bit rgb bitmaps.
         /// </summary>
-        private const int Rgb16GMask = 0x3E0;
+        private const int DefaultRgb16GMask = 0x3E0;
 
         /// <summary>
-        /// The mask for the blue part of the color for 16 bit rgb bitmaps.
+        /// The default mask for the blue part of the color for 16 bit rgb bitmaps.
         /// </summary>
-        private const int Rgb16BMask = 0x1F;
+        private const int DefaultRgb16BMask = 0x1F;
 
         /// <summary>
         /// RLE8 flag value that indicates following byte has special meaning.
@@ -62,10 +64,15 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private Stream stream;
 
         /// <summary>
-        /// The metadata
+        /// The metadata.
         /// </summary>
         private ImageMetaData metaData;
 
+        /// <summary>
+        /// The bmp specific metadata.
+        /// </summary>
+        private BmpMetaData bmpMetaData;
+
         /// <summary>
         /// The file header containing general information.
         /// TODO: Why is this not used? We advance the stream but do not use the values parsed.
@@ -85,7 +92,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// Initializes a new instance of the <see cref="BmpDecoderCore"/> class.
         /// </summary>
         /// <param name="configuration">The configuration.</param>
-        /// <param name="options">The options</param>
+        /// <param name="options">The options.</param>
         public BmpDecoderCore(Configuration configuration, IBmpDecoderOptions options)
         {
             this.configuration = configuration;
@@ -119,7 +126,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     case BmpCompression.RGB:
                         if (this.infoHeader.BitsPerPixel == 32)
                         {
-                            this.ReadRgb32(pixels, this.infoHeader.Width, this.infoHeader.Height, inverted);
+                            if (this.bmpMetaData.InfoHeaderType == BmpInfoHeaderType.WinVersion3)
+                            {
+                                this.ReadRgb32Slow(pixels, this.infoHeader.Width, this.infoHeader.Height, inverted);
+                            }
+                            else
+                            {
+                                this.ReadRgb32Fast(pixels, this.infoHeader.Width, this.infoHeader.Height, inverted);
+                            }
                         }
                         else if (this.infoHeader.BitsPerPixel == 24)
                         {
@@ -146,6 +160,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                         this.ReadRle8(pixels, palette, this.infoHeader.Width, this.infoHeader.Height, inverted);
 
                         break;
+
+                    case BmpCompression.BitFields:
+                        this.ReadBitFields(pixels, inverted);
+
+                        break;
+
                     default:
                         throw new NotSupportedException("Does not support this kind of bitmap files.");
                 }
@@ -199,12 +219,39 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Performs final shifting from a 5bit value to an 8bit one.
+        /// Decodes a bitmap containing BITFIELDS Compression type. For each color channel, there will be bitmask
+        /// which will be used to determine which bits belong to that channel.
         /// </summary>
-        /// <param name="value">The masked and shifted value</param>
-        /// <returns>The <see cref="byte"/></returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private static byte GetBytesFrom5BitValue(int value) => (byte)((value << 3) | (value >> 2));
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="pixels">The output pixel buffer containing the decoded image.</param>
+        /// <param name="inverted">Whether the bitmap is inverted.</param>
+        private void ReadBitFields<TPixel>(Buffer2D<TPixel> pixels, bool inverted)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            if (this.infoHeader.BitsPerPixel == 16)
+            {
+                this.ReadRgb16(
+                    pixels,
+                    this.infoHeader.Width,
+                    this.infoHeader.Height,
+                    inverted,
+                    this.infoHeader.RedMask,
+                    this.infoHeader.GreenMask,
+                    this.infoHeader.BlueMask);
+            }
+            else
+            {
+                this.ReadRgb32BitFields(
+                    pixels,
+                    this.infoHeader.Width,
+                    this.infoHeader.Height,
+                    inverted,
+                    this.infoHeader.RedMask,
+                    this.infoHeader.GreenMask,
+                    this.infoHeader.BlueMask,
+                    this.infoHeader.AlphaMask);
+            }
+        }
 
         /// <summary>
         /// Looks up color values and builds the image from de-compressed RLE8 data.
@@ -240,12 +287,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Produce uncompressed bitmap data from RLE8 stream
+        /// Produce uncompressed bitmap data from RLE8 stream.
         /// </summary>
         /// <remarks>
-        /// RLE8 is a 2-byte run-length encoding
-        /// <br/>If first byte is 0, the second byte may have special meaning
-        /// <br/>Otherwise, first byte is the length of the run and second byte is the color for the run
+        /// RLE8 is a 2-byte run-length encoding.
+        /// <br/>If first byte is 0, the second byte may have special meaning.
+        /// <br/>Otherwise, first byte is the length of the run and second byte is the color for the run.
         /// </remarks>
         /// <param name="w">The width of the bitmap.</param>
         /// <param name="buffer">Buffer for uncompressed data.</param>
@@ -382,20 +429,32 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Reads the 16 bit color palette from the stream
+        /// Reads the 16 bit color palette from the stream.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
         /// <param name="width">The width of the bitmap.</param>
         /// <param name="height">The height of the bitmap.</param>
         /// <param name="inverted">Whether the bitmap is inverted.</param>
-        private void ReadRgb16<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted)
+        /// <param name="redMask">The bitmask for the red channel.</param>
+        /// <param name="greenMask">The bitmask for the green channel.</param>
+        /// <param name="blueMask">The bitmask for the blue channel.</param>
+        private void ReadRgb16<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted, int redMask = DefaultRgb16RMask, int greenMask = DefaultRgb16GMask, int blueMask = DefaultRgb16BMask)
             where TPixel : struct, IPixel<TPixel>
         {
             int padding = CalculatePadding(width, 2);
             int stride = (width * 2) + padding;
             TPixel color = default;
 
+            int rightShiftRedMask = CalculateRightShift((uint)redMask);
+            int rightShiftGreenMask = CalculateRightShift((uint)greenMask);
+            int rightShiftBlueMask = CalculateRightShift((uint)blueMask);
+
+            // Each color channel contains either 5 or 6 Bits values.
+            int redMaskBits = CountBits((uint)redMask);
+            int greenMaskBits = CountBits((uint)greenMask);
+            int blueMaskBits = CountBits((uint)blueMask);
+
             using (IManagedByteBuffer buffer = this.memoryAllocator.AllocateManagedByteBuffer(stride))
             {
                 for (int y = 0; y < height; y++)
@@ -409,10 +468,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     {
                         short temp = BitConverter.ToInt16(buffer.Array, offset);
 
-                        var rgb = new Rgb24(
-                        GetBytesFrom5BitValue((temp & Rgb16RMask) >> 10),
-                        GetBytesFrom5BitValue((temp & Rgb16GMask) >> 5),
-                        GetBytesFrom5BitValue(temp & Rgb16BMask));
+                        // Rescale values, so the values range from 0 to 255.
+                        int r = (redMaskBits == 5) ? GetBytesFrom5BitValue((temp & redMask) >> rightShiftRedMask) : GetBytesFrom6BitValue((temp & redMask) >> rightShiftRedMask);
+                        int g = (greenMaskBits == 5) ? GetBytesFrom5BitValue((temp & greenMask) >> rightShiftGreenMask) : GetBytesFrom6BitValue((temp & greenMask) >> rightShiftGreenMask);
+                        int b = (blueMaskBits == 5) ? GetBytesFrom5BitValue((temp & blueMask) >> rightShiftBlueMask) : GetBytesFrom6BitValue((temp & blueMask) >> rightShiftBlueMask);
+                        var rgb = new Rgb24((byte)r, (byte)g, (byte)b);
 
                         color.FromRgb24(rgb);
                         pixelRow[x] = color;
@@ -423,7 +483,23 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Reads the 24 bit color palette from the stream
+        /// Performs final shifting from a 5bit value to an 8bit one.
+        /// </summary>
+        /// <param name="value">The masked and shifted value.</param>
+        /// <returns>The <see cref="byte"/></returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static byte GetBytesFrom5BitValue(int value) => (byte)((value << 3) | (value >> 2));
+
+        /// <summary>
+        /// Performs final shifting from a 6bit value to an 8bit one.
+        /// </summary>
+        /// <param name="value">The masked and shifted value.</param>
+        /// <returns>The <see cref="byte"/></returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static byte GetBytesFrom6BitValue(int value) => (byte)((value << 2) | (value >> 4));
+
+        /// <summary>
+        /// Reads the 24 bit color palette from the stream.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
@@ -452,14 +528,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Reads the 32 bit color palette from the stream
+        /// Reads the 32 bit color palette from the stream.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
         /// <param name="width">The width of the bitmap.</param>
         /// <param name="height">The height of the bitmap.</param>
         /// <param name="inverted">Whether the bitmap is inverted.</param>
-        private void ReadRgb32<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted)
+        private void ReadRgb32Fast<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted)
             where TPixel : struct, IPixel<TPixel>
         {
             int padding = CalculatePadding(width, 4);
@@ -480,6 +556,228 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             }
         }
 
+        /// <summary>
+        /// Reads the 32 bit color palette from the stream, checking the alpha component of each pixel.
+        /// This is a special case only used for 32bpp WinBMPv3 files, which could be in either BGR0 or BGRA format.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
+        /// <param name="width">The width of the bitmap.</param>
+        /// <param name="height">The height of the bitmap.</param>
+        /// <param name="inverted">Whether the bitmap is inverted.</param>
+        private void ReadRgb32Slow<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            int padding = CalculatePadding(width, 4);
+
+            using (IManagedByteBuffer row = this.memoryAllocator.AllocatePaddedPixelRowBuffer(width, 4, padding))
+            using (IMemoryOwner<Bgra32> bgraRow = this.memoryAllocator.Allocate<Bgra32>(width))
+            {
+                Span<Bgra32> bgraRowSpan = bgraRow.GetSpan();
+                long currentPosition = this.stream.Position;
+                bool hasAlpha = false;
+
+                // Loop though the rows checking each pixel. We start by assuming it's
+                // an BGR0 image. If we hit a non-zero alpha value, then we know it's
+                // actually a BGRA image, and change tactics accordingly.
+                for (int y = 0; y < height; y++)
+                {
+                    this.stream.Read(row);
+
+                    PixelOperations<Bgra32>.Instance.FromBgra32Bytes(
+                        this.configuration,
+                        row.GetSpan(),
+                        bgraRowSpan,
+                        width);
+
+                    // Check each pixel in the row to see if it has an alpha value.
+                    for (int x = 0; x < width; x++)
+                    {
+                        Bgra32 bgra = bgraRowSpan[x];
+                        if (bgra.A > 0)
+                        {
+                            hasAlpha = true;
+                            break;
+                        }
+                    }
+
+                    if (hasAlpha)
+                    {
+                        break;
+                    }
+                }
+
+                // Reset our stream for a second pass.
+                this.stream.Position = currentPosition;
+
+                // Process the pixels in bulk taking the raw alpha component value.
+                if (hasAlpha)
+                {
+                    for (int y = 0; y < height; y++)
+                    {
+                        this.stream.Read(row);
+
+                        int newY = Invert(y, height, inverted);
+                        Span<TPixel> pixelSpan = pixels.GetRowSpan(newY);
+
+                        PixelOperations<TPixel>.Instance.FromBgra32Bytes(
+                            this.configuration,
+                            row.GetSpan(),
+                            pixelSpan,
+                            width);
+                    }
+
+                    return;
+                }
+
+                // Slow path. We need to set each alpha component value to fully opaque.
+                for (int y = 0; y < height; y++)
+                {
+                    this.stream.Read(row);
+                    PixelOperations<Bgra32>.Instance.FromBgra32Bytes(
+                        this.configuration,
+                        row.GetSpan(),
+                        bgraRowSpan,
+                        width);
+
+                    int newY = Invert(y, height, inverted);
+                    Span<TPixel> pixelSpan = pixels.GetRowSpan(newY);
+
+                    for (int x = 0; x < width; x++)
+                    {
+                        Bgra32 bgra = bgraRowSpan[x];
+                        bgra.A = byte.MaxValue;
+                        ref TPixel pixel = ref pixelSpan[x];
+                        pixel.FromBgra32(bgra);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Decode an 32 Bit Bitmap containing a bitmask for each color channel.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="pixels">The output pixel buffer containing the decoded image.</param>
+        /// <param name="width">The width of the image.</param>
+        /// <param name="height">The height of the image.</param>
+        /// <param name="inverted">Whether the bitmap is inverted.</param>
+        /// <param name="redMask">The bitmask for the red channel.</param>
+        /// <param name="greenMask">The bitmask for the green channel.</param>
+        /// <param name="blueMask">The bitmask for the blue channel.</param>
+        /// <param name="alphaMask">The bitmask for the alpha channel.</param>
+        private void ReadRgb32BitFields<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted, int redMask, int greenMask, int blueMask, int alphaMask)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel color = default;
+            int padding = CalculatePadding(width, 4);
+            int stride = (width * 4) + padding;
+
+            int rightShiftRedMask = CalculateRightShift((uint)redMask);
+            int rightShiftGreenMask = CalculateRightShift((uint)greenMask);
+            int rightShiftBlueMask = CalculateRightShift((uint)blueMask);
+            int rightShiftAlphaMask = CalculateRightShift((uint)alphaMask);
+
+            int bitsRedMask = CountBits((uint)redMask);
+            int bitsGreenMask = CountBits((uint)greenMask);
+            int bitsBlueMask = CountBits((uint)blueMask);
+            int bitsAlphaMask = CountBits((uint)alphaMask);
+            float invMaxValueRed = 1.0f / (0xFFFFFFFF >> (32 - bitsRedMask));
+            float invMaxValueGreen = 1.0f / (0xFFFFFFFF >> (32 - bitsGreenMask));
+            float invMaxValueBlue = 1.0f / (0xFFFFFFFF >> (32 - bitsBlueMask));
+            uint maxValueAlpha = 0xFFFFFFFF >> (32 - bitsAlphaMask);
+            float invMaxValueAlpha = 1.0f / maxValueAlpha;
+
+            bool unusualBitMask = false;
+            if (bitsRedMask > 8 || bitsGreenMask > 8 || bitsBlueMask > 8 || invMaxValueAlpha > 8)
+            {
+                unusualBitMask = true;
+            }
+
+            using (IManagedByteBuffer buffer = this.memoryAllocator.AllocateManagedByteBuffer(stride))
+            {
+                for (int y = 0; y < height; y++)
+                {
+                    this.stream.Read(buffer.Array, 0, stride);
+                    int newY = Invert(y, height, inverted);
+                    Span<TPixel> pixelRow = pixels.GetRowSpan(newY);
+
+                    int offset = 0;
+                    for (int x = 0; x < width; x++)
+                    {
+                        uint temp = BitConverter.ToUInt32(buffer.Array, offset);
+
+                        if (unusualBitMask)
+                        {
+                            uint r = (uint)(temp & redMask) >> rightShiftRedMask;
+                            uint g = (uint)(temp & greenMask) >> rightShiftGreenMask;
+                            uint b = (uint)(temp & blueMask) >> rightShiftBlueMask;
+                            float alpha = alphaMask != 0 ? invMaxValueAlpha * ((uint)(temp & alphaMask) >> rightShiftAlphaMask) : 1.0f;
+                            var vector4 = new Vector4(
+                                r * invMaxValueRed,
+                                g * invMaxValueGreen,
+                                b * invMaxValueBlue,
+                                alpha);
+                            color.FromVector4(vector4);
+                        }
+                        else
+                        {
+                            byte r = (byte)((temp & redMask) >> rightShiftRedMask);
+                            byte g = (byte)((temp & greenMask) >> rightShiftGreenMask);
+                            byte b = (byte)((temp & blueMask) >> rightShiftBlueMask);
+                            byte a = alphaMask != 0 ? (byte)((temp & alphaMask) >> rightShiftAlphaMask) : (byte)255;
+                            color.FromRgba32(new Rgba32(r, g, b, a));
+                        }
+
+                        pixelRow[x] = color;
+                        offset += 4;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Calculates the necessary right shifts for a given color bitmask (the 0 bits to the right).
+        /// </summary>
+        /// <param name="n">The color bit mask.</param>
+        /// <returns>Number of bits to shift right.</returns>
+        private static int CalculateRightShift(uint n)
+        {
+            int count = 0;
+            while (n > 0)
+            {
+                if ((1 & n) == 0)
+                {
+                    count++;
+                }
+                else
+                {
+                    break;
+                }
+
+                n >>= 1;
+            }
+
+            return count;
+        }
+
+        /// <summary>
+        /// Counts none zero bits.
+        /// </summary>
+        /// <param name="n">A color mask.</param>
+        /// <returns>The none zero bits.</returns>
+        private static int CountBits(uint n)
+        {
+            int count = 0;
+            while (n != 0)
+            {
+                count++;
+                n &= n - 1;
+            }
+
+            return count;
+        }
+
         /// <summary>
         /// Reads the <see cref="BmpInfoHeader"/> from the stream.
         /// </summary>
@@ -508,20 +806,54 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             // read the rest of the header
             this.stream.Read(buffer, BmpInfoHeader.HeaderSizeSize, headerSize - BmpInfoHeader.HeaderSizeSize);
 
+            BmpInfoHeaderType inofHeaderType = BmpInfoHeaderType.WinVersion2;
             if (headerSize == BmpInfoHeader.CoreSize)
             {
                 // 12 bytes
+                inofHeaderType = BmpInfoHeaderType.WinVersion2;
                 this.infoHeader = BmpInfoHeader.ParseCore(buffer);
             }
             else if (headerSize == BmpInfoHeader.Os22ShortSize)
             {
                 // 16 bytes
+                inofHeaderType = BmpInfoHeaderType.Os2Version2Short;
                 this.infoHeader = BmpInfoHeader.ParseOs22Short(buffer);
             }
-            else if (headerSize >= BmpInfoHeader.Size)
+            else if (headerSize == BmpInfoHeader.SizeV3)
+            {
+                // == 40 bytes
+                inofHeaderType = BmpInfoHeaderType.WinVersion3;
+                this.infoHeader = BmpInfoHeader.ParseV3(buffer);
+
+                // if the info header is BMP version 3 and the compression type is BITFIELDS,
+                // color masks for each color channel follow the info header.
+                if (this.infoHeader.Compression == BmpCompression.BitFields)
+                {
+                    byte[] bitfieldsBuffer = new byte[12];
+                    this.stream.Read(bitfieldsBuffer, 0, 12);
+                    Span<byte> data = bitfieldsBuffer.AsSpan<byte>();
+                    this.infoHeader.RedMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4));
+                    this.infoHeader.GreenMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4));
+                    this.infoHeader.BlueMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4));
+                }
+            }
+            else if (headerSize == BmpInfoHeader.AdobeV3Size)
+            {
+                // == 52 bytes
+                inofHeaderType = BmpInfoHeaderType.AdobeVersion3;
+                this.infoHeader = BmpInfoHeader.ParseAdobeV3(buffer, withAlpha: false);
+            }
+            else if (headerSize == BmpInfoHeader.AdobeV3WithAlphaSize)
+            {
+                // == 56 bytes
+                inofHeaderType = BmpInfoHeaderType.AdobeVersion3WithAlpha;
+                this.infoHeader = BmpInfoHeader.ParseAdobeV3(buffer, withAlpha: true);
+            }
+            else if (headerSize >= BmpInfoHeader.SizeV4)
             {
-                // >= 40 bytes
-                this.infoHeader = BmpInfoHeader.Parse(buffer);
+                // >= 108 bytes
+                inofHeaderType = headerSize == BmpInfoHeader.SizeV4 ? BmpInfoHeaderType.WinVersion4 : BmpInfoHeaderType.WinVersion5;
+                this.infoHeader = BmpInfoHeader.ParseV4(buffer);
             }
             else
             {
@@ -548,13 +880,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.metaData = meta;
 
             short bitsPerPixel = this.infoHeader.BitsPerPixel;
-            BmpMetaData bmpMetaData = this.metaData.GetFormatMetaData(BmpFormat.Instance);
+            this.bmpMetaData = this.metaData.GetFormatMetaData(BmpFormat.Instance);
+            this.bmpMetaData.InfoHeaderType = inofHeaderType;
 
             // We can only encode at these bit rates so far.
             if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel32))
             {
-                bmpMetaData.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
+                this.bmpMetaData.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
             }
 
             // skip the remaining header because we can't read those parts
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index a67c581eb0..27a38bc0d1 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -23,6 +23,26 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private int padding;
 
+        /// <summary>
+        /// The mask for the alpha channel of the color for a 32 bit rgba bitmaps.
+        /// </summary>
+        private const int Rgba32AlphaMask = 0xFF << 24;
+
+        /// <summary>
+        /// The mask for the red part of the color for a 32 bit rgba bitmaps.
+        /// </summary>
+        private const int Rgba32RedMask = 0xFF << 16;
+
+        /// <summary>
+        /// The mask for the green part of the color for a 32 bit rgba bitmaps.
+        /// </summary>
+        private const int Rgba32GreenMask = 0xFF << 8;
+
+        /// <summary>
+        /// The mask for the blue part of the color for a 32 bit rgba bitmaps.
+        /// </summary>
+        private const int Rgba32BlueMask = 0xFF;
+
         private readonly MemoryAllocator memoryAllocator;
 
         private Configuration configuration;
@@ -92,8 +112,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 }
             }
 
+            int infoHeaderSize = BmpInfoHeader.SizeV4;
             var infoHeader = new BmpInfoHeader(
-                headerSize: BmpInfoHeader.Size,
+                headerSize: infoHeaderSize,
                 height: image.Height,
                 width: image.Width,
                 bitsPerPixel: bpp,
@@ -102,26 +123,37 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 clrUsed: 0,
                 clrImportant: 0,
                 xPelsPerMeter: hResolution,
-                yPelsPerMeter: vResolution);
+                yPelsPerMeter: vResolution)
+            {
+                RedMask = Rgba32RedMask,
+                GreenMask = Rgba32GreenMask,
+                BlueMask = Rgba32BlueMask,
+                Compression = BmpCompression.BitFields
+            };
+
+            if (this.bitsPerPixel == BmpBitsPerPixel.Pixel32)
+            {
+                infoHeader.AlphaMask = Rgba32AlphaMask;
+            }
 
             var fileHeader = new BmpFileHeader(
-                type: 19778, // BM
-                fileSize: 54 + infoHeader.ImageSize,
+                type: BmpConstants.TypeMarkers.Bitmap,
+                fileSize: BmpFileHeader.Size + infoHeaderSize + infoHeader.ImageSize,
                 reserved: 0,
-                offset: 54);
+                offset: BmpFileHeader.Size + infoHeaderSize);
 
 #if NETCOREAPP2_1
-            Span<byte> buffer = stackalloc byte[40];
+            Span<byte> buffer = stackalloc byte[infoHeaderSize];
 #else
-            byte[] buffer = new byte[40];
+            byte[] buffer = new byte[infoHeaderSize];
 #endif
             fileHeader.WriteTo(buffer);
 
             stream.Write(buffer, 0, BmpFileHeader.Size);
 
-            infoHeader.WriteTo(buffer);
+            infoHeader.WriteV4Header(buffer);
 
-            stream.Write(buffer, 0, 40);
+            stream.Write(buffer, 0, infoHeaderSize);
 
             this.WriteImage(stream, image.Frames.RootFrame);
 
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
index 5177bc325c..316df4acc9 100644
--- a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
@@ -16,11 +16,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     [StructLayout(LayoutKind.Sequential, Pack = 1)]
     internal struct BmpInfoHeader
     {
-        /// <summary>
-        /// Defines the size of the BITMAPINFOHEADER data structure in the bitmap file.
-        /// </summary>
-        public const int Size = 40;
-
         /// <summary>
         /// Defines the size of the BITMAPCOREHEADER data structure in the bitmap file.
         /// </summary>
@@ -31,10 +26,30 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         public const int Os22ShortSize = 16;
 
+        /// <summary>
+        /// Defines the size of the BITMAPINFOHEADER (BMP Version 3) data structure in the bitmap file.
+        /// </summary>
+        public const int SizeV3 = 40;
+
+        /// <summary>
+        /// Special case of the BITMAPINFOHEADER V3 used by adobe where the color bitmasks are part of the info header instead of following it.
+        /// </summary>
+        public const int AdobeV3Size = 52;
+
+        /// <summary>
+        /// Special case of the BITMAPINFOHEADER V3 used by adobe where the color bitmasks (including the alpha channel) are part of the info header instead of following it.
+        /// </summary>
+        public const int AdobeV3WithAlphaSize = 56;
+
+        /// <summary>
+        /// Defines the size of the BITMAPINFOHEADER (BMP Version 4) data structure in the bitmap file.
+        /// </summary>
+        public const int SizeV4 = 108;
+
         /// <summary>
         /// Defines the size of the biggest supported header data structure in the bitmap file.
         /// </summary>
-        public const int MaxHeaderSize = Size;
+        public const int MaxHeaderSize = SizeV4;
 
         /// <summary>
         /// Defines the size of the <see cref="HeaderSize"/> field.
@@ -52,7 +67,24 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             int xPelsPerMeter = 0,
             int yPelsPerMeter = 0,
             int clrUsed = 0,
-            int clrImportant = 0)
+            int clrImportant = 0,
+            int redMask = 0,
+            int greenMask = 0,
+            int blueMask = 0,
+            int alphaMask = 0,
+            int csType = 0,
+            int redX = 0,
+            int redY = 0,
+            int redZ = 0,
+            int greenX = 0,
+            int greenY = 0,
+            int greenZ = 0,
+            int blueX = 0,
+            int blueY = 0,
+            int blueZ = 0,
+            int gammeRed = 0,
+            int gammeGreen = 0,
+            int gammeBlue = 0)
         {
             this.HeaderSize = headerSize;
             this.Width = width;
@@ -65,6 +97,23 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.YPelsPerMeter = yPelsPerMeter;
             this.ClrUsed = clrUsed;
             this.ClrImportant = clrImportant;
+            this.RedMask = redMask;
+            this.GreenMask = greenMask;
+            this.BlueMask = blueMask;
+            this.AlphaMask = alphaMask;
+            this.CsType = csType;
+            this.RedX = redX;
+            this.RedY = redY;
+            this.RedZ = redZ;
+            this.GreenX = greenX;
+            this.GreenY = greenY;
+            this.GreenZ = greenZ;
+            this.BlueX = blueX;
+            this.BlueY = blueY;
+            this.BlueZ = blueZ;
+            this.GammaRed = gammeRed;
+            this.GammaGreen = gammeGreen;
+            this.GammaBlue = gammeBlue;
         }
 
         /// <summary>
@@ -130,23 +179,92 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         public int ClrImportant { get; set; }
 
         /// <summary>
-        /// Parses the full BITMAPINFOHEADER header (40 bytes).
+        /// Gets or sets red color mask. This is used with the BITFIELDS decoding.
         /// </summary>
-        /// <param name="data">The data to parse.</param>
-        /// <returns>Parsed header</returns>
-        /// <seealso href="https://msdn.microsoft.com/en-us/library/windows/desktop/dd183376.aspx"/>
-        public static BmpInfoHeader Parse(ReadOnlySpan<byte> data)
-        {
-            if (data.Length != Size)
-            {
-                throw new ArgumentException(nameof(data), $"Must be {Size} bytes. Was {data.Length} bytes.");
-            }
+        public int RedMask { get; set; }
 
-            return MemoryMarshal.Cast<byte, BmpInfoHeader>(data)[0];
-        }
+        /// <summary>
+        /// Gets or sets green color mask. This is used with the BITFIELDS decoding.
+        /// </summary>
+        public int GreenMask { get; set; }
+
+        /// <summary>
+        /// Gets or sets blue color mask. This is used with the BITFIELDS decoding.
+        /// </summary>
+        public int BlueMask { get; set; }
+
+        /// <summary>
+        /// Gets or sets alpha color mask. This is not used yet.
+        /// </summary>
+        public int AlphaMask { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Color space type. Not used yet.
+        /// </summary>
+        public int CsType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the X coordinate of red endpoint. Not used yet.
+        /// </summary>
+        public int RedX { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Y coordinate of red endpoint. Not used yet.
+        /// </summary>
+        public int RedY { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Z coordinate of red endpoint. Not used yet.
+        /// </summary>
+        public int RedZ { get; set; }
+
+        /// <summary>
+        /// Gets or sets the X coordinate of green endpoint. Not used yet.
+        /// </summary>
+        public int GreenX { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Y coordinate of green endpoint. Not used yet.
+        /// </summary>
+        public int GreenY { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Z coordinate of green endpoint. Not used yet.
+        /// </summary>
+        public int GreenZ { get; set; }
+
+        /// <summary>
+        /// Gets or sets the X coordinate of blue endpoint. Not used yet.
+        /// </summary>
+        public int BlueX { get; set; }
 
         /// <summary>
-        /// Parses the BITMAPCOREHEADER consisting of the headerSize, width, height, planes, and bitsPerPixel fields (12 bytes).
+        /// Gets or sets the Y coordinate of blue endpoint. Not used yet.
+        /// </summary>
+        public int BlueY { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Z coordinate of blue endpoint. Not used yet.
+        /// </summary>
+        public int BlueZ { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Gamma red coordinate scale value. Not used yet.
+        /// </summary>
+        public int GammaRed { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Gamma green coordinate scale value. Not used yet.
+        /// </summary>
+        public int GammaGreen { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Gamma blue coordinate scale value. Not used yet.
+        /// </summary>
+        public int GammaBlue { get; set; }
+
+        /// <summary>
+        /// Parses the BITMAPCOREHEADER (BMP Version 2) consisting of the headerSize, width, height, planes, and bitsPerPixel fields (12 bytes).
         /// </summary>
         /// <param name="data">The data to parse.</param>
         /// <returns>Parsed header</returns>
@@ -163,7 +281,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         /// <summary>
         /// Parses a short variant of the OS22XBITMAPHEADER. It is identical to the BITMAPCOREHEADER, except that the width and height
-        /// are 4 bytes instead of 2.
+        /// are 4 bytes instead of 2, resulting in 16 bytes total.
         /// </summary>
         /// <param name="data">The data to parse.</param>
         /// <returns>Parsed header</returns>
@@ -178,7 +296,97 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 bitsPerPixel: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(14, 2)));
         }
 
-        public unsafe void WriteTo(Span<byte> buffer)
+        /// <summary>
+        /// Parses the full BMP Version 3 BITMAPINFOHEADER header (40 bytes).
+        /// </summary>
+        /// <param name="data">The data to parse.</param>
+        /// <returns>The parsed header.</returns>
+        /// <seealso href="http://www.fileformat.info/format/bmp/egff.htm"/>
+        public static BmpInfoHeader ParseV3(ReadOnlySpan<byte> data)
+        {
+            return new BmpInfoHeader(
+                headerSize: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4)),
+                width: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4)),
+                height: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4)),
+                planes: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(12, 2)),
+                bitsPerPixel: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(14, 2)),
+                compression: (BmpCompression)BinaryPrimitives.ReadInt32LittleEndian(data.Slice(16, 4)),
+                imageSize: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(20, 4)),
+                xPelsPerMeter: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(24, 4)),
+                yPelsPerMeter: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(28, 4)),
+                clrUsed: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(32, 4)),
+                clrImportant: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(36, 4)));
+        }
+
+        /// <summary>
+        /// Special case of the BITMAPINFOHEADER V3 used by adobe where the color bitmasks are part of the info header instead of following it.
+        /// 52 bytes without the alpha mask, 56 bytes with the alpha mask.
+        /// </summary>
+        /// <param name="data">The data to parse.</param>
+        /// <param name="withAlpha">Indicates, if the alpha bitmask is present.</param>
+        /// <returns>The parsed header.</returns>
+        /// <seealso href="https://forums.adobe.com/message/3272950#3272950"/>
+        public static BmpInfoHeader ParseAdobeV3(ReadOnlySpan<byte> data, bool withAlpha = true)
+        {
+            return new BmpInfoHeader(
+                headerSize: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4)),
+                width: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4)),
+                height: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4)),
+                planes: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(12, 2)),
+                bitsPerPixel: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(14, 2)),
+                compression: (BmpCompression)BinaryPrimitives.ReadInt32LittleEndian(data.Slice(16, 4)),
+                imageSize: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(20, 4)),
+                xPelsPerMeter: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(24, 4)),
+                yPelsPerMeter: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(28, 4)),
+                clrUsed: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(32, 4)),
+                clrImportant: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(36, 4)),
+                redMask: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(40, 4)),
+                greenMask: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(44, 4)),
+                blueMask: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(48, 4)),
+                alphaMask: withAlpha ? BinaryPrimitives.ReadInt32LittleEndian(data.Slice(52, 4)) : 0);
+        }
+
+        /// <summary>
+        /// Parses the full BMP Version 4 BITMAPINFOHEADER header (108 bytes).
+        /// </summary>
+        /// <param name="data">The data to parse.</param>
+        /// <returns>The parsed header.</returns>
+        /// <seealso href="http://www.fileformat.info/format/bmp/egff.htm"/>
+        public static BmpInfoHeader ParseV4(ReadOnlySpan<byte> data)
+        {
+            if (data.Length != SizeV4)
+            {
+                throw new ArgumentException(nameof(data), $"Must be {SizeV4} bytes. Was {data.Length} bytes.");
+            }
+
+            return MemoryMarshal.Cast<byte, BmpInfoHeader>(data)[0];
+        }
+
+        /// <summary>
+        /// Writes a bitmap version 3 (Microsoft Windows NT) header to a buffer (40 bytes).
+        /// </summary>
+        /// <param name="buffer">The buffer to write to.</param>
+        public void WriteV3Header(Span<byte> buffer)
+        {
+            buffer.Clear();
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(0, 4), SizeV3);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(4, 4), this.Width);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(8, 4), this.Height);
+            BinaryPrimitives.WriteInt16LittleEndian(buffer.Slice(12, 2), this.Planes);
+            BinaryPrimitives.WriteInt16LittleEndian(buffer.Slice(14, 2), this.BitsPerPixel);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(16, 4), (int)this.Compression);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(20, 4), this.ImageSize);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(24, 4), this.XPelsPerMeter);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(28, 4), this.YPelsPerMeter);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(32, 4), this.ClrUsed);
+            BinaryPrimitives.WriteInt32LittleEndian(buffer.Slice(36, 4), this.ClrImportant);
+        }
+
+        /// <summary>
+        /// Writes a complete Bitmap V4 header to a buffer.
+        /// </summary>
+        /// <param name="buffer">The buffer to write to.</param>
+        public unsafe void WriteV4Header(Span<byte> buffer)
         {
             ref BmpInfoHeader dest = ref Unsafe.As<byte, BmpInfoHeader>(ref MemoryMarshal.GetReference(buffer));
 
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
new file mode 100644
index 0000000000..a4ce0115f9
--- /dev/null
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
@@ -0,0 +1,48 @@
+namespace SixLabors.ImageSharp.Formats.Bmp
+{
+    /// <summary>
+    /// Enum value for the different bitmap info header types. The enum value is the number of bytes for the specific bitmap header.
+    /// </summary>
+    public enum BmpInfoHeaderType
+    {
+        /// <summary>
+        /// Bitmap Core or BMP Version 2 header (Microsoft Windows 2.x).
+        /// </summary>
+        WinVersion2 = 12,
+
+        /// <summary>
+        /// Short variant of the OS/2 Version 2 bitmap header.
+        /// </summary>
+        Os2Version2Short = 16,
+
+        /// <summary>
+        /// BMP Version 3 header (Microsoft Windows 3.x or Microsoft Windows NT).
+        /// </summary>
+        WinVersion3 = 40,
+
+        /// <summary>
+        /// Adobe variant of the BMP Version 3 header.
+        /// </summary>
+        AdobeVersion3 = 52,
+
+        /// <summary>
+        /// Adobe variant of the BMP Version 3 header with an alpha mask.
+        /// </summary>
+        AdobeVersion3WithAlpha = 56,
+
+        /// <summary>
+        /// BMP Version 2.x header (IBM OS/2 2.x).
+        /// </summary>
+        Os2Version2 = 64,
+
+        /// <summary>
+        /// BMP Version 4 header (Microsoft Windows 95).
+        /// </summary>
+        WinVersion4 = 108,
+
+        /// <summary>
+        /// BMP Version 5 header (Windows NT 5.0, 98 or later).
+        /// </summary>
+        WinVersion5 = 124,
+    }
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpMetaData.cs b/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
index 8b33e30fa6..2d86856177 100644
--- a/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
@@ -19,7 +19,16 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// Initializes a new instance of the <see cref="BmpMetaData"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private BmpMetaData(BmpMetaData other) => this.BitsPerPixel = other.BitsPerPixel;
+        private BmpMetaData(BmpMetaData other)
+        {
+            this.BitsPerPixel = other.BitsPerPixel;
+            this.InfoHeaderType = other.InfoHeaderType;
+        }
+
+        /// <summary>
+        /// Gets or sets the bitmap info header type.
+        /// </summary>
+        public BmpInfoHeaderType InfoHeaderType { get; set; }
 
         /// <summary>
         /// Gets or sets the number of bits per pixel.
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 251475567f..60e45ae35f 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -4,6 +4,9 @@
 using System.IO;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs;
+
 using Xunit;
 
 // ReSharper disable InconsistentNaming
@@ -19,6 +22,8 @@ namespace SixLabors.ImageSharp.Tests
 
         public static readonly string[] AllBmpFiles = All;
 
+        public static readonly string[] BitfieldsBmpFiles = BitFields;
+
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
@@ -34,7 +39,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
-                image.DebugSave(provider, "bmp");
+                image.DebugSave(provider);
 
                 if (TestEnvironment.IsWindows)
                 {
@@ -44,17 +49,47 @@ namespace SixLabors.ImageSharp.Tests
         }
 
         [Theory]
-        [WithFile(F, CommonNonDefaultPixelTypes)]
-        public void BmpDecoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(BitfieldsBmpFiles), PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBitfields<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
-                image.DebugSave(provider, "bmp");
+                image.DebugSave(provider);
                 image.CompareToOriginal(provider);
             }
         }
 
+        [Theory]
+        [WithFile(Bit32Rgba, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBitmap_WithAlphaChannel<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
+        [Theory]
+        [WithFile(Rgba321010102, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBitfields_WithUnusualBitmasks<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+
+                // Choosing large tolerance of 6.1 here, because for some reason with the MagickReferenceDecoder the alpha channel
+                // seems to be wrong. This bitmap has an alpha channel of two bits. In many cases this alpha channel has a value of 3,
+                // which should be remapped to 255 for RGBA32, but the magick decoder has a value of 191 set.
+                // The total difference without the alpha channel is still: 0.0204%
+                // Exporting the image as PNG with GIMP yields to the same result as the imagesharp implementation.
+                image.CompareToOriginal(provider, ImageComparer.TolerantPercentage(6.1f), new MagickReferenceDecoder());                
+            }
+        }
+
         [Theory]
         [WithFile(WinBmpv2, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeBmpv2<TPixel>(TestImageProvider<TPixel> provider)
@@ -62,7 +97,67 @@ namespace SixLabors.ImageSharp.Tests
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
-                image.DebugSave(provider, "png");
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(WinBmpv3, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(Rgba32bf56, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeAdobeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
+        [Theory]
+        [WithFile(WinBmpv4, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBmpv4<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(WinBmpv5, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeBmpv5<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(F, CommonNonDefaultPixelTypes)]
+        public void BmpDecoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
                 image.CompareToOriginal(provider);
             }
         }
@@ -74,7 +169,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
-                image.DebugSave(provider, "png");
+                image.DebugSave(provider);
                 image.CompareToOriginal(provider);
             }
         }
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 8d8a32fba3..5ecc266572 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -205,12 +205,36 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit16 = "Bmp/test16.bmp";
             public const string Bit16Inverted = "Bmp/test16-inverted.bmp";
             public const string Bit32Rgb = "Bmp/rgb32.bmp";
-            
+            public const string Bit32Rgba = "Bmp/rgba32.bmp";
+
             // Note: This format can be called OS/2 BMPv1, or Windows BMPv2
             public const string WinBmpv2 = "Bmp/pal8os2v1_winv2.bmp";
+            public const string WinBmpv3 = "Bmp/rgb24.bmp";
+            public const string WinBmpv4 = "Bmp/pal8v4.bmp";
+            public const string WinBmpv5 = "Bmp/pal8v5.bmp";
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
 
+            // Bitmap images with compression type BITFIELDS
+            public const string Rgb32bfdef = "Bmp/rgb32bfdef.bmp";
+            public const string Rgb32bf = "Bmp/rgb32bf.bmp";
+            public const string Rgb16565 = "Bmp/rgb16-565.bmp";
+            public const string Rgb16bfdef = "Bmp/rgb16bfdef.bmp";
+            public const string Rgb16565pal = "Bmp/rgb16-565pal.bmp";
+            public const string Issue735 = "Bmp/issue735.bmp";
+            public const string Rgba32bf56 = "Bmp/rgba32h56.bmp";
+            public const string Rgba321010102 = "Bmp/rgba32-1010102.bmp";
+
+            public static readonly string[] BitFields 
+            = {
+                  Rgb32bfdef,
+                  Rgb32bf,
+                  Rgb16565,
+                  Rgb16bfdef,
+                  Rgb16565pal,
+                  Issue735,
+            };
+
             public static readonly string[] All
             = {
                 Car,
@@ -225,7 +249,8 @@ namespace SixLabors.ImageSharp.Tests
                 Bit8,
                 Bit8Inverted,
                 Bit16,
-                Bit16Inverted
+                Bit16Inverted,
+                Bit32Rgb
             };
         }
 
diff --git a/tests/Images/Input/Bmp/issue735.bmp b/tests/Images/Input/Bmp/issue735.bmp
new file mode 100644
index 0000000000..139e73830f
--- /dev/null
+++ b/tests/Images/Input/Bmp/issue735.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2d4b076196ca2559581b1e64f448b3dcefc78ba38a6f91953b2d7cfa95465d11
+size 1334298
diff --git a/tests/Images/Input/Bmp/pal8v4.bmp b/tests/Images/Input/Bmp/pal8v4.bmp
new file mode 100644
index 0000000000..87dad63bc1
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8v4.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4dc4a9725f4c7b7b8ea1e181d1aee9355fe724dbd949ab562b3b364df9c90d64
+size 9322
diff --git a/tests/Images/Input/Bmp/pal8v5.bmp b/tests/Images/Input/Bmp/pal8v5.bmp
new file mode 100644
index 0000000000..82c8b0ed78
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8v5.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:65ac4a579189d2fc30b3499b8246f30127e032f35d6cde90335dafe87a1b23c3
+size 9338
diff --git a/tests/Images/Input/Bmp/rgb16-565.bmp b/tests/Images/Input/Bmp/rgb16-565.bmp
new file mode 100644
index 0000000000..d0d65bdbc7
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb16-565.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c2ffadac9c1239fb397834415c7b5f85d5c6044bd9c31fa66e23056a19b82b1d
+size 16450
diff --git a/tests/Images/Input/Bmp/rgb16-565pal.bmp b/tests/Images/Input/Bmp/rgb16-565pal.bmp
new file mode 100644
index 0000000000..5bf1691622
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb16-565pal.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bcf485398db9c92235e5e9a7c20aaf3899ecf00ccdf25680f85e0797df610ea4
+size 17474
diff --git a/tests/Images/Input/Bmp/rgb16bfdef.bmp b/tests/Images/Input/Bmp/rgb16bfdef.bmp
new file mode 100644
index 0000000000..5967db9286
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb16bfdef.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3c5d1d67482b769d875b552e6012b80434880f763c9d56a45a94d07bbbe16fba
+size 16450
diff --git a/tests/Images/Input/Bmp/rgb24.bmp b/tests/Images/Input/Bmp/rgb24.bmp
new file mode 100644
index 0000000000..2f54e2d5a9
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb24.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a9c4fbfbf8cb6df8d2d9d1484359d037aebd25078b21137bfd6c69739fcbe2e1
+size 24630
diff --git a/tests/Images/Input/Bmp/rgb32bf.bmp b/tests/Images/Input/Bmp/rgb32bf.bmp
new file mode 100644
index 0000000000..dc6d38f8d8
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb32bf.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c1189e3a039b1e5aae6347024684937c495a5736a3c309dc7c2e3c161f89751
+size 32578
diff --git a/tests/Images/Input/Bmp/rgb32bfdef.bmp b/tests/Images/Input/Bmp/rgb32bfdef.bmp
new file mode 100644
index 0000000000..64598caf94
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb32bfdef.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:54d89660058b6ade17f54d0664b67ced375bbd67db9b89a4ada3addeaab7381a
+size 32578
diff --git a/tests/Images/Input/Bmp/rgba32-1010102.bmp b/tests/Images/Input/Bmp/rgba32-1010102.bmp
new file mode 100644
index 0000000000..2eb610cbfc
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgba32-1010102.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3a784719de2d33f8678ea0efb8b52be662e0f126e723150010057cf8fd89e777
+size 32650
diff --git a/tests/Images/Input/Bmp/rgba32.bmp b/tests/Images/Input/Bmp/rgba32.bmp
new file mode 100644
index 0000000000..e331b25bd8
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgba32.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:257e0127fa0ccdb6eb8381338dda0fb692b2ea4d38775f1aed56dfdccaed2ab4
+size 32650
diff --git a/tests/Images/Input/Bmp/rgba32h56.bmp b/tests/Images/Input/Bmp/rgba32h56.bmp
new file mode 100644
index 0000000000..9efaa4e4e0
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgba32h56.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:12d76fd71a341c80a80a5c0116dea8d7338fe801d8483b594124d7b20ed1d782
+size 32582

From 0d68e6d09d23ce3c6fa6fbf9fe48af1ece53490e Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Sun, 20 Jan 2019 07:54:47 +0100
Subject: [PATCH 013/223] Added support for RLE4 encoded bitmaps (#812)

---
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 132 +++++++++++++++++-
 .../Formats/Bmp/BmpDecoderTests.cs            |   2 +-
 .../Formats/Bmp/BmpEncoderTests.cs            |   2 +-
 tests/ImageSharp.Tests/TestImages.cs          |  10 +-
 tests/Images/Input/Bmp/pal4rle.bmp            |   3 +
 5 files changed, 138 insertions(+), 11 deletions(-)
 create mode 100644 tests/Images/Input/Bmp/pal4rle.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 362fe64430..8ca698b878 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -157,7 +157,8 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
                         break;
                     case BmpCompression.RLE8:
-                        this.ReadRle8(pixels, palette, this.infoHeader.Width, this.infoHeader.Height, inverted);
+                    case BmpCompression.RLE4:
+                        this.ReadRle(this.infoHeader.Compression, pixels, palette, this.infoHeader.Width, this.infoHeader.Height, inverted);
 
                         break;
 
@@ -254,22 +255,31 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Looks up color values and builds the image from de-compressed RLE8 data.
+        /// Looks up color values and builds the image from de-compressed RLE8 or RLE4 data.
         /// Compressed RLE8 stream is uncompressed by <see cref="UncompressRle8(int, Span{byte})"/>
+        /// Compressed RLE4 stream is uncompressed by <see cref="UncompressRle4(int, Span{byte})"/>
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="compression">The compression type. Either RLE4 or RLE8.</param>
         /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
         /// <param name="colors">The <see cref="T:byte[]"/> containing the colors.</param>
         /// <param name="width">The width of the bitmap.</param>
         /// <param name="height">The height of the bitmap.</param>
         /// <param name="inverted">Whether the bitmap is inverted.</param>
-        private void ReadRle8<TPixel>(Buffer2D<TPixel> pixels, byte[] colors, int width, int height, bool inverted)
+        private void ReadRle<TPixel>(BmpCompression compression, Buffer2D<TPixel> pixels, byte[] colors, int width, int height, bool inverted)
             where TPixel : struct, IPixel<TPixel>
         {
             TPixel color = default;
             using (Buffer2D<byte> buffer = this.memoryAllocator.Allocate2D<byte>(width, height, AllocationOptions.Clean))
             {
-                this.UncompressRle8(width, buffer.GetSpan());
+                if (compression == BmpCompression.RLE8)
+                {
+                    this.UncompressRle8(width, buffer.GetSpan());
+                }
+                else
+                {
+                    this.UncompressRle4(width, buffer.GetSpan());
+                }
 
                 for (int y = 0; y < height; y++)
                 {
@@ -287,12 +297,122 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Produce uncompressed bitmap data from RLE8 stream.
+        /// Produce uncompressed bitmap data from a RLE4 stream.
+        /// </summary>
+        /// <remarks>
+        /// RLE4 is a 2-byte run-length encoding.
+        /// <br/>If first byte is 0, the second byte may have special meaning.
+        /// <br/>Otherwise, the first byte is the length of the run and second byte contains two color indexes.
+        /// </remarks>
+        /// <param name="w">The width of the bitmap.</param>
+        /// <param name="buffer">Buffer for uncompressed data.</param>
+        private void UncompressRle4(int w, Span<byte> buffer)
+        {
+#if NETCOREAPP2_1
+            Span<byte> cmd = stackalloc byte[2];
+#else
+            byte[] cmd = new byte[2];
+#endif
+            int count = 0;
+
+            while (count < buffer.Length)
+            {
+                if (this.stream.Read(cmd, 0, cmd.Length) != 2)
+                {
+                    throw new Exception("Failed to read 2 bytes from the stream");
+                }
+
+                if (cmd[0] == RleCommand)
+                {
+                    switch (cmd[1])
+                    {
+                        case RleEndOfBitmap:
+                            return;
+
+                        case RleEndOfLine:
+                            int extra = count % w;
+                            if (extra > 0)
+                            {
+                                count += w - extra;
+                            }
+
+                            break;
+
+                        case RleDelta:
+                            int dx = this.stream.ReadByte();
+                            int dy = this.stream.ReadByte();
+                            count += (w * dy) + dx;
+
+                            break;
+
+                        default:
+                            // If the second byte > 2, we are in 'absolute mode'.
+                            // The second byte contains the number of color indexes that follow.
+                            int max = cmd[1];
+                            int bytesToRead = (max + 1) / 2;
+
+                            byte[] run = new byte[bytesToRead];
+
+                            this.stream.Read(run, 0, run.Length);
+
+                            int idx = 0;
+                            for (int i = 0; i < max; i++)
+                            {
+                                byte twoPixels = run[idx];
+                                if (i % 2 == 0)
+                                {
+                                    byte leftPixel = (byte)((twoPixels >> 4) & 0xF);
+                                    buffer[count++] = leftPixel;
+                                }
+                                else
+                                {
+                                    byte rightPixel = (byte)(twoPixels & 0xF);
+                                    buffer[count++] = rightPixel;
+                                    idx++;
+                                }
+                            }
+
+                            // Absolute mode data is aligned to two-byte word-boundary
+                            int padding = bytesToRead & 1;
+
+                            this.stream.Skip(padding);
+
+                            break;
+                    }
+                }
+                else
+                {
+                    int max = cmd[0];
+
+                    // The second byte contains two color indexes, one in its high-order 4 bits and one in its low-order 4 bits.
+                    byte twoPixels = cmd[1];
+                    byte rightPixel = (byte)(twoPixels & 0xF);
+                    byte leftPixel = (byte)((twoPixels >> 4) & 0xF);
+
+                    for (int idx = 0; idx < max; idx++)
+                    {
+                        if (idx % 2 == 0)
+                        {
+                            buffer[count] = leftPixel;
+                        }
+                        else
+                        {
+                            buffer[count] = rightPixel;
+                        }
+
+                        count++;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Produce uncompressed bitmap data from a RLE8 stream.
         /// </summary>
         /// <remarks>
         /// RLE8 is a 2-byte run-length encoding.
         /// <br/>If first byte is 0, the second byte may have special meaning.
-        /// <br/>Otherwise, first byte is the length of the run and second byte is the color for the run.
+        /// <br/>Otherwise, the first byte is the length of the run and second byte is the color for the run.
         /// </remarks>
         /// <param name="w">The width of the bitmap.</param>
         /// <param name="buffer">Buffer for uncompressed data.</param>
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 60e45ae35f..0ebfbf311a 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             { TestImages.Bmp.Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
             { TestImages.Bmp.V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.RLE, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
+            { TestImages.Bmp.RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
         };
 
         [Theory]
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index b9f855cf12..f818be8a91 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             { TestImages.Bmp.Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
             { TestImages.Bmp.V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.RLE, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
+            { TestImages.Bmp.RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
         };
 
         public static readonly TheoryData<string, BmpBitsPerPixel> BmpBitsPerPixelFiles =
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 5ecc266572..6e6c7ce47a 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -195,7 +195,8 @@ namespace SixLabors.ImageSharp.Tests
             public const string NegHeight = "Bmp/neg_height.bmp";
             public const string CoreHeader = "Bmp/BitmapCoreHeaderQR.bmp";
             public const string V5Header = "Bmp/BITMAPV5HEADER.bmp";
-            public const string RLE = "Bmp/RunLengthEncoded.bmp";
+            public const string RLE8 = "Bmp/RunLengthEncoded.bmp";
+            public const string RLE4 = "Bmp/pal4rle.bmp";
             public const string RLEInverted = "Bmp/RunLengthEncoded-inverted.bmp";
             public const string Bit1 = "Bmp/pal1.bmp";
             public const string Bit1Pal1 = "Bmp/pal1p1.bmp";
@@ -209,6 +210,7 @@ namespace SixLabors.ImageSharp.Tests
 
             // Note: This format can be called OS/2 BMPv1, or Windows BMPv2
             public const string WinBmpv2 = "Bmp/pal8os2v1_winv2.bmp";
+
             public const string WinBmpv3 = "Bmp/rgb24.bmp";
             public const string WinBmpv4 = "Bmp/pal8v4.bmp";
             public const string WinBmpv5 = "Bmp/pal8v5.bmp";
@@ -218,8 +220,8 @@ namespace SixLabors.ImageSharp.Tests
             // Bitmap images with compression type BITFIELDS
             public const string Rgb32bfdef = "Bmp/rgb32bfdef.bmp";
             public const string Rgb32bf = "Bmp/rgb32bf.bmp";
-            public const string Rgb16565 = "Bmp/rgb16-565.bmp";
             public const string Rgb16bfdef = "Bmp/rgb16bfdef.bmp";
+            public const string Rgb16565 = "Bmp/rgb16-565.bmp";
             public const string Rgb16565pal = "Bmp/rgb16-565pal.bmp";
             public const string Issue735 = "Bmp/issue735.bmp";
             public const string Rgba32bf56 = "Bmp/rgba32h56.bmp";
@@ -241,7 +243,9 @@ namespace SixLabors.ImageSharp.Tests
                 F,
                 NegHeight,
                 CoreHeader,
-                V5Header, RLE,
+                V5Header,
+                RLE4,
+                RLE8,
                 RLEInverted,
                 Bit1,
                 Bit1Pal1,
diff --git a/tests/Images/Input/Bmp/pal4rle.bmp b/tests/Images/Input/Bmp/pal4rle.bmp
new file mode 100644
index 0000000000..b83a2a98d6
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal4rle.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3c26b6bdd22311e03b1ac0713b0a3b6af5e579bef16694cbea74ae0c4a2599e4
+size 3836

From 2c621120175e5503f51aabe544f0ec79980302fc Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Wed, 23 Jan 2019 13:22:58 +0100
Subject: [PATCH 014/223] Adds support for OS/2 version 2 bitmaps (#813)

* Added support for OS/2 version 2 bitmaps

* throw NotSupportedException, if the file header type is not BM

* renamed Os2v2 to Os2v2Size

* Added BmpThrowHelper similar to the JpegThrowHelper
---
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 41 +++++++++-----
 src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs   | 54 ++++++++++++++++++-
 src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs  | 28 ++++++++++
 .../Formats/Bmp/BmpDecoderTests.cs            | 18 ++++++-
 tests/ImageSharp.Tests/TestImages.cs          |  1 +
 tests/Images/Input/Bmp/pal8os2v2.bmp          |  3 ++
 6 files changed, 129 insertions(+), 16 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
 create mode 100644 tests/Images/Input/Bmp/pal8os2v2.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 8ca698b878..6bfdfa3a29 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -168,7 +168,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                         break;
 
                     default:
-                        throw new NotSupportedException("Does not support this kind of bitmap files.");
+                        BmpThrowHelper.ThrowNotSupportedException("Does not support this kind of bitmap files.");
+
+                        break;
                 }
 
                 return image;
@@ -319,7 +321,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             {
                 if (this.stream.Read(cmd, 0, cmd.Length) != 2)
                 {
-                    throw new Exception("Failed to read 2 bytes from the stream");
+                    BmpThrowHelper.ThrowImageFormatException("Failed to read 2 bytes from the stream while uncompressing RLE4 bitmap.");
                 }
 
                 if (cmd[0] == RleCommand)
@@ -429,7 +431,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             {
                 if (this.stream.Read(cmd, 0, cmd.Length) != 2)
                 {
-                    throw new Exception("Failed to read 2 bytes from stream");
+                    BmpThrowHelper.ThrowImageFormatException("Failed to read 2 bytes from stream while uncompressing RLE8 bitmap.");
                 }
 
                 if (cmd[0] == RleCommand)
@@ -913,7 +915,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             int headerSize = BinaryPrimitives.ReadInt32LittleEndian(buffer);
             if (headerSize < BmpInfoHeader.CoreSize)
             {
-                throw new NotSupportedException($"ImageSharp does not support this BMP file. HeaderSize: {headerSize}.");
+                BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. HeaderSize is '{headerSize}'.");
             }
 
             int skipAmount = 0;
@@ -926,23 +928,23 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             // read the rest of the header
             this.stream.Read(buffer, BmpInfoHeader.HeaderSizeSize, headerSize - BmpInfoHeader.HeaderSizeSize);
 
-            BmpInfoHeaderType inofHeaderType = BmpInfoHeaderType.WinVersion2;
+            BmpInfoHeaderType infoHeaderType = BmpInfoHeaderType.WinVersion2;
             if (headerSize == BmpInfoHeader.CoreSize)
             {
                 // 12 bytes
-                inofHeaderType = BmpInfoHeaderType.WinVersion2;
+                infoHeaderType = BmpInfoHeaderType.WinVersion2;
                 this.infoHeader = BmpInfoHeader.ParseCore(buffer);
             }
             else if (headerSize == BmpInfoHeader.Os22ShortSize)
             {
                 // 16 bytes
-                inofHeaderType = BmpInfoHeaderType.Os2Version2Short;
+                infoHeaderType = BmpInfoHeaderType.Os2Version2Short;
                 this.infoHeader = BmpInfoHeader.ParseOs22Short(buffer);
             }
             else if (headerSize == BmpInfoHeader.SizeV3)
             {
                 // == 40 bytes
-                inofHeaderType = BmpInfoHeaderType.WinVersion3;
+                infoHeaderType = BmpInfoHeaderType.WinVersion3;
                 this.infoHeader = BmpInfoHeader.ParseV3(buffer);
 
                 // if the info header is BMP version 3 and the compression type is BITFIELDS,
@@ -960,24 +962,30 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             else if (headerSize == BmpInfoHeader.AdobeV3Size)
             {
                 // == 52 bytes
-                inofHeaderType = BmpInfoHeaderType.AdobeVersion3;
+                infoHeaderType = BmpInfoHeaderType.AdobeVersion3;
                 this.infoHeader = BmpInfoHeader.ParseAdobeV3(buffer, withAlpha: false);
             }
             else if (headerSize == BmpInfoHeader.AdobeV3WithAlphaSize)
             {
                 // == 56 bytes
-                inofHeaderType = BmpInfoHeaderType.AdobeVersion3WithAlpha;
+                infoHeaderType = BmpInfoHeaderType.AdobeVersion3WithAlpha;
                 this.infoHeader = BmpInfoHeader.ParseAdobeV3(buffer, withAlpha: true);
             }
+            else if (headerSize == BmpInfoHeader.Os2v2Size)
+            {
+                // == 64 bytes
+                infoHeaderType = BmpInfoHeaderType.Os2Version2;
+                this.infoHeader = BmpInfoHeader.ParseOs2Version2(buffer);
+            }
             else if (headerSize >= BmpInfoHeader.SizeV4)
             {
                 // >= 108 bytes
-                inofHeaderType = headerSize == BmpInfoHeader.SizeV4 ? BmpInfoHeaderType.WinVersion4 : BmpInfoHeaderType.WinVersion5;
+                infoHeaderType = headerSize == BmpInfoHeader.SizeV4 ? BmpInfoHeaderType.WinVersion4 : BmpInfoHeaderType.WinVersion5;
                 this.infoHeader = BmpInfoHeader.ParseV4(buffer);
             }
             else
             {
-                throw new NotSupportedException($"ImageSharp does not support this BMP file. HeaderSize: {headerSize}.");
+                BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. HeaderSize '{headerSize}'.");
             }
 
             // Resolution is stored in PPM.
@@ -1001,7 +1009,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
             short bitsPerPixel = this.infoHeader.BitsPerPixel;
             this.bmpMetaData = this.metaData.GetFormatMetaData(BmpFormat.Instance);
-            this.bmpMetaData.InfoHeaderType = inofHeaderType;
+            this.bmpMetaData.InfoHeaderType = infoHeaderType;
 
             // We can only encode at these bit rates so far.
             if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
@@ -1027,6 +1035,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.stream.Read(buffer, 0, BmpFileHeader.Size);
 
             this.fileHeader = BmpFileHeader.Parse(buffer);
+
+            if (this.fileHeader.Type != BmpConstants.TypeMarkers.Bitmap)
+            {
+                BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. File header bitmap type marker '{this.fileHeader.Type}'.");
+            }
         }
 
         /// <summary>
@@ -1080,7 +1093,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 // 256 * 4
                 if (colorMapSize > 1024)
                 {
-                    throw new ImageFormatException($"Invalid bmp colormap size '{colorMapSize}'");
+                    BmpThrowHelper.ThrowImageFormatException($"Invalid bmp colormap size '{colorMapSize}'");
                 }
 
                 palette = new byte[colorMapSize];
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
index 316df4acc9..6da5f73e3f 100644
--- a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
@@ -41,6 +41,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         public const int AdobeV3WithAlphaSize = 56;
 
+        /// <summary>
+        /// Size of a IBM OS/2 2.x bitmap header.
+        /// </summary>
+        public const int Os2v2Size = 64;
+
         /// <summary>
         /// Defines the size of the BITMAPINFOHEADER (BMP Version 4) data structure in the bitmap file.
         /// </summary>
@@ -117,7 +122,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Gets or sets the size of this header
+        /// Gets or sets the size of this header.
         /// </summary>
         public int HeaderSize { get; set; }
 
@@ -346,6 +351,53 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 alphaMask: withAlpha ? BinaryPrimitives.ReadInt32LittleEndian(data.Slice(52, 4)) : 0);
         }
 
+        /// <summary>
+        /// Parses a OS/2 version 2 bitmap header (64 bytes). Only the first 40 bytes are parsed which are
+        /// very similar to the Bitmap v3 header. The other 24 bytes are ignored, but they do not hold any
+        /// useful information for decoding the image.
+        /// </summary>
+        /// <param name="data">The data to parse.</param>
+        /// <returns>The parsed header.</returns>
+        /// <seealso href="https://www.fileformat.info/format/os2bmp/egff.htm"/>
+        public static BmpInfoHeader ParseOs2Version2(ReadOnlySpan<byte> data)
+        {
+            var infoHeader = new BmpInfoHeader(
+                headerSize: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4)),
+                width: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4)),
+                height: BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4)),
+                planes: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(12, 2)),
+                bitsPerPixel: BinaryPrimitives.ReadInt16LittleEndian(data.Slice(14, 2)));
+
+            int compression = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(16, 4));
+
+            // The compression value in OS/2 bitmap has a different meaning than in windows bitmaps.
+            // Map the OS/2 value to the windows values.
+            switch (compression)
+            {
+                case 0:
+                    infoHeader.Compression = BmpCompression.RGB;
+                    break;
+                case 1:
+                    infoHeader.Compression = BmpCompression.RLE8;
+                    break;
+                case 2:
+                    infoHeader.Compression = BmpCompression.RLE4;
+                    break;
+                default:
+                    BmpThrowHelper.ThrowImageFormatException($"Compression type is not supported. ImageSharp only supports uncompressed, RLE4 and RLE8.");
+                    break;
+            }
+
+            infoHeader.ImageSize = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(20, 4));
+            infoHeader.XPelsPerMeter = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(24, 4));
+            infoHeader.YPelsPerMeter = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(28, 4));
+            infoHeader.ClrUsed = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(32, 4));
+            infoHeader.ClrImportant = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(36, 4));
+
+            // The following 24 bytes of the header are omitted.
+            return infoHeader;
+        }
+
         /// <summary>
         /// Parses the full BMP Version 4 BITMAPINFOHEADER header (108 bytes).
         /// </summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs b/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
new file mode 100644
index 0000000000..dae044ddbd
--- /dev/null
+++ b/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace SixLabors.ImageSharp.Formats.Bmp
+{
+    internal static class BmpThrowHelper
+    {
+        /// <summary>
+        /// Cold path optimization for throwing <see cref="ImageFormatException"/>-s
+        /// </summary>
+        /// <param name="errorMessage">The error message for the exception.</param>
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void ThrowImageFormatException(string errorMessage)
+        {
+            throw new ImageFormatException(errorMessage);
+        }
+
+        /// <summary>
+        /// Cold path optimization for throwing <see cref="NotSupportedException"/>-s
+        /// </summary>
+        /// <param name="errorMessage">The error message for the exception.</param>
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void ThrowNotSupportedException(string errorMessage)
+        {
+            throw new NotSupportedException(errorMessage);
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 0ebfbf311a..5d7d35dd58 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -214,12 +214,28 @@ namespace SixLabors.ImageSharp.Tests
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
-                image.DebugSave(provider, "png");
+                image.DebugSave(provider);
 
                 // TODO: Neither System.Drawing not MagickReferenceDecoder 
                 // can correctly decode this file.
                 // image.CompareToOriginal(provider);
             }
         }
+
+        [Theory]
+        [WithFile(Os2v2, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_Os2v2Header<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+
+                // TODO: System.Drawing can not decode this image. MagickReferenceDecoder can decode it,
+                // but i think incorrectly. I have loaded the image with GIMP and exported as PNG.
+                // The results are the same as the image sharp implementation.
+                // image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 6e6c7ce47a..d83fe4907d 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -216,6 +216,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string WinBmpv5 = "Bmp/pal8v5.bmp";
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
+            public const string Os2v2 = "Bmp/pal8os2v2.bmp";
 
             // Bitmap images with compression type BITFIELDS
             public const string Rgb32bfdef = "Bmp/rgb32bfdef.bmp";
diff --git a/tests/Images/Input/Bmp/pal8os2v2.bmp b/tests/Images/Input/Bmp/pal8os2v2.bmp
new file mode 100644
index 0000000000..11473a632b
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8os2v2.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e2597b53091d734900068b42cddaed7430261cc5eade32b4f19fd6c2c4568a52
+size 9278

From 2bf060f40b8a7f49554130599e07990bea832e1d Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 25 Jan 2019 16:32:45 +1100
Subject: [PATCH 015/223] Update dependencies + fix stylecop (#816)

---
 .gitmodules                                   |  3 +
 ImageSharp.sln                                |  5 +-
 .../ImageSharp.Drawing.csproj                 | 97 ++++++++++---------
 .../Helpers/SimdUtils.ExtendedIntrinsics.cs   |  5 +-
 src/ImageSharp/Common/Helpers/TestHelpers.cs  |  2 +-
 .../ParallelExecutionSettings.cs              |  2 +-
 .../Common/ParallelUtils/ParallelHelper.cs    |  2 +-
 src/ImageSharp/Common/Tuples/Octet.cs         |  5 +-
 src/ImageSharp/Common/Tuples/Vector4Pair.cs   |  5 +-
 .../Formats/Bmp/BmpInfoHeaderType.cs          |  5 +-
 src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs  |  5 +-
 .../Formats/Gif/Sections/IGifExtension.cs     |  5 +-
 .../Jpeg/Components/Decoder/ScanDecoder.cs    |  3 +-
 .../Encoder/YCbCrForwardConverter{TPixel}.cs  |  5 +-
 .../Formats/Jpeg/JpegEncoderCore.cs           | 37 ++++++-
 .../Formats/Png/Chunks/PhysicalChunkData.cs   |  5 +-
 .../Formats/Png/Filters/UpFilter.cs           |  3 +-
 src/ImageSharp/Formats/Png/PngConstants.cs    |  3 +-
 src/ImageSharp/ImageSharp.csproj              | 21 ++--
 src/ImageSharp/Memory/RowInterval.cs          |  2 +-
 .../MetaData/Profiles/Exif/ExifConstants.cs   |  6 +-
 .../MetaData/Profiles/Exif/ExifTags.cs        |  2 +-
 .../TagDataEntries/IccLut16TagDataEntry.cs    |  7 +-
 .../ICC/TagDataEntries/IccLut8TagDataEntry.cs |  7 +-
 .../Utils/Vector4Converters.Default.cs        |  5 +-
 .../Utils/Vector4Converters.RgbaCompatible.cs |  5 +-
 standards                                     |  1 +
 27 files changed, 167 insertions(+), 86 deletions(-)
 create mode 160000 standards

diff --git a/.gitmodules b/.gitmodules
index e7972649f4..37ef701cdf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,3 +2,6 @@
 	path = tests/Images/External
 	url = https://github.com/SixLabors/Imagesharp.Tests.Images.git
 	branch = master
+[submodule "standards"]
+	path = standards
+	url = https://github.com/SixLabors/Standards
diff --git a/ImageSharp.sln b/ImageSharp.sln
index 8f3bc68602..3c3817bf63 100644
--- a/ImageSharp.sln
+++ b/ImageSharp.sln
@@ -5,7 +5,7 @@ VisualStudioVersion = 15.0.26730.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "SolutionItems", "SolutionItems", "{C317F1B1-D75E-4C6D-83EB-80367343E0D7}"
 	ProjectSection(SolutionItems) = preProject
-		.editorconfig = .editorconfig
+		standards\.editorconfig = standards\.editorconfig
 		.travis.yml = .travis.yml
 		appveyor.yml = appveyor.yml
 		.github\ISSUE_TEMPLATE\ask-question.md = .github\ISSUE_TEMPLATE\ask-question.md
@@ -15,12 +15,13 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "SolutionItems", "SolutionIt
 		.github\CONTRIBUTING.md = .github\CONTRIBUTING.md
 		.github\ISSUE_TEMPLATE\feature-request.md = .github\ISSUE_TEMPLATE\feature-request.md
 		features.md = features.md
-		ImageSharp.ruleset = ImageSharp.ruleset
 		ImageSharp.sln.DotSettings = ImageSharp.sln.DotSettings
 		NuGet.config = NuGet.config
 		.github\PULL_REQUEST_TEMPLATE.md = .github\PULL_REQUEST_TEMPLATE.md
 		README.md = README.md
 		run-tests.ps1 = run-tests.ps1
+		standards\SixLabors.ruleset = standards\SixLabors.ruleset
+		standards\stylecop.json = standards\stylecop.json
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Source", "Source", "{815C0625-CD3D-440F-9F80-2D83856AB7AE}"
diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index a6f529ee36..f4906d25e3 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -1,50 +1,53 @@
 <Project Sdk="Microsoft.NET.Sdk">
-    <PropertyGroup>      
-        <AssemblyTitle>SixLabors.ImageSharp.Drawing</AssemblyTitle>
-        <Authors>SixLabors and contributors</Authors>
-        <Company>Six Labors</Company>
-        <Copyright>Copyright (c) Six Labors and contributors.</Copyright>
-        <Product>SixLabors.ImageSharp</Product>
-        <Description>An extension to ImageSharp that allows the drawing of images, paths, and text.</Description>
-        <NeutralLanguage>en</NeutralLanguage>
+  <PropertyGroup>
+    <AssemblyTitle>SixLabors.ImageSharp.Drawing</AssemblyTitle>
+    <Authors>SixLabors and contributors</Authors>
+    <Company>Six Labors</Company>
+    <Copyright>Copyright (c) Six Labors and contributors.</Copyright>
+    <Product>SixLabors.ImageSharp</Product>
+    <Description>An extension to ImageSharp that allows the drawing of images, paths, and text.</Description>
+    <NeutralLanguage>en</NeutralLanguage>
 
-        <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
-        <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-        <TargetFrameworks>netstandard1.3;netstandard2.0</TargetFrameworks>
-        <LangVersion>7.3</LangVersion>
-        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-        <GenerateDocumentationFile>true</GenerateDocumentationFile>
-        <AssemblyName>SixLabors.ImageSharp.Drawing</AssemblyName>
-        <PackageId>SixLabors.ImageSharp.Drawing</PackageId>
-        <PackageTags>Image Draw Shape Path Font</PackageTags>
-        <PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Branding/master/icons/imagesharp/sixlabors.imagesharp.128.png</PackageIconUrl>
-        <PackageProjectUrl>https://github.com/SixLabors/ImageSharp</PackageProjectUrl>
-        <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
-        <RepositoryType>git</RepositoryType>
-        <RepositoryUrl>https://github.com/SixLabors/ImageSharp</RepositoryUrl>
-        <DebugType Condition="$(codecov) != ''">full</DebugType>
-        <DebugType Condition="$(codecov) == ''">portable</DebugType>
-        <DebugSymbols>True</DebugSymbols>
-    </PropertyGroup>
-    <ItemGroup>
-        <Compile Include="..\Shared\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
-    </ItemGroup>
-    <ItemGroup>
-        <ProjectReference Include="..\ImageSharp\ImageSharp.csproj" />
-    </ItemGroup>
-    <ItemGroup>
-        <AdditionalFiles Include="..\..\stylecop.json" />
-        <PackageReference Include="SixLabors.Fonts" Version="1.0.0-dev000119" />
-        <PackageReference Include="SixLabors.Shapes" Version="1.0.0-dev000102" />
-        <PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta007">
-            <PrivateAssets>All</PrivateAssets>
-        </PackageReference>
-    </ItemGroup>
-    <PropertyGroup>
-        <CodeAnalysisRuleSet>..\..\ImageSharp.ruleset</CodeAnalysisRuleSet>
-        <RootNamespace>SixLabors.ImageSharp</RootNamespace>
-    </PropertyGroup>
-    <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
-        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    </PropertyGroup>
+    <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
+    <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
+    <TargetFrameworks>netstandard1.3;netstandard2.0</TargetFrameworks>
+    <LangVersion>7.3</LangVersion>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+    <AssemblyName>SixLabors.ImageSharp.Drawing</AssemblyName>
+    <PackageId>SixLabors.ImageSharp.Drawing</PackageId>
+    <PackageTags>Image Draw Shape Path Font</PackageTags>
+    <PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Branding/master/icons/imagesharp/sixlabors.imagesharp.128.png</PackageIconUrl>
+    <PackageProjectUrl>https://github.com/SixLabors/ImageSharp</PackageProjectUrl>
+    <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
+    <RepositoryType>git</RepositoryType>
+    <RepositoryUrl>https://github.com/SixLabors/ImageSharp</RepositoryUrl>
+    <DebugType Condition="$(codecov) != ''">full</DebugType>
+    <DebugType Condition="$(codecov) == ''">portable</DebugType>
+    <DebugSymbols>True</DebugSymbols>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="..\Shared\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ImageSharp\ImageSharp.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <AdditionalFiles Include="..\..\standards\stylecop.json" />
+    <PackageReference Include="SixLabors.Fonts" Version="1.0.0-beta0008" />
+    <PackageReference Include="SixLabors.Shapes" Version="1.0.0-beta0008" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-beta.61" PrivateAssets="All" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <CodeAnalysisRuleSet>..\..\standards\SixLabors.ruleset</CodeAnalysisRuleSet>
+    <RootNamespace>SixLabors.ImageSharp</RootNamespace>
+  </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/src/ImageSharp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs b/src/ImageSharp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs
index 9aeb209319..83216aaa72 100644
--- a/src/ImageSharp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs
+++ b/src/ImageSharp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
diff --git a/src/ImageSharp/Common/Helpers/TestHelpers.cs b/src/ImageSharp/Common/Helpers/TestHelpers.cs
index fd16a577ab..d330233c4c 100644
--- a/src/ImageSharp/Common/Helpers/TestHelpers.cs
+++ b/src/ImageSharp/Common/Helpers/TestHelpers.cs
@@ -1,4 +1,4 @@
-// Copyright(c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 namespace SixLabors.ImageSharp.Common.Helpers
diff --git a/src/ImageSharp/Common/ParallelUtils/ParallelExecutionSettings.cs b/src/ImageSharp/Common/ParallelUtils/ParallelExecutionSettings.cs
index 0b45719c38..40163bc789 100644
--- a/src/ImageSharp/Common/ParallelUtils/ParallelExecutionSettings.cs
+++ b/src/ImageSharp/Common/ParallelUtils/ParallelExecutionSettings.cs
@@ -1,4 +1,4 @@
-// Copyright(c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.Threading.Tasks;
diff --git a/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs b/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
index 782333219f..a930b8390f 100644
--- a/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
+++ b/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
@@ -1,4 +1,4 @@
-// Copyright(c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
diff --git a/src/ImageSharp/Common/Tuples/Octet.cs b/src/ImageSharp/Common/Tuples/Octet.cs
index 539b74e324..23faf08ae9 100644
--- a/src/ImageSharp/Common/Tuples/Octet.cs
+++ b/src/ImageSharp/Common/Tuples/Octet.cs
@@ -1,4 +1,7 @@
-using System.Runtime.CompilerServices;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 namespace SixLabors.ImageSharp.Tuples
diff --git a/src/ImageSharp/Common/Tuples/Vector4Pair.cs b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
index 2e5ca31371..b3a32deeef 100644
--- a/src/ImageSharp/Common/Tuples/Vector4Pair.cs
+++ b/src/ImageSharp/Common/Tuples/Vector4Pair.cs
@@ -1,4 +1,7 @@
-using System.Numerics;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
index a4ce0115f9..a92a19d9ba 100644
--- a/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeaderType.cs
@@ -1,4 +1,7 @@
-namespace SixLabors.ImageSharp.Formats.Bmp
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
     /// Enum value for the different bitmap info header types. The enum value is the number of bytes for the specific bitmap header.
diff --git a/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs b/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
index dae044ddbd..443471404e 100644
--- a/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Runtime.CompilerServices;
 
 namespace SixLabors.ImageSharp.Formats.Bmp
diff --git a/src/ImageSharp/Formats/Gif/Sections/IGifExtension.cs b/src/ImageSharp/Formats/Gif/Sections/IGifExtension.cs
index 2fdc233b0c..c8bd286746 100644
--- a/src/ImageSharp/Formats/Gif/Sections/IGifExtension.cs
+++ b/src/ImageSharp/Formats/Gif/Sections/IGifExtension.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 
 namespace SixLabors.ImageSharp.Formats.Gif
 {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
index 48abca2a4e..a1c1b023e4 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
@@ -474,7 +474,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                         Unsafe.Add(ref blockDataRef, zig) = (short)this.ExtendReceive(s);
                     }
                 }
-            } while (k < 64);
+            }
+            while (k < 64);
         }
 
         private void DecodeBlockProgressiveDC(
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Encoder/YCbCrForwardConverter{TPixel}.cs b/src/ImageSharp/Formats/Jpeg/Components/Encoder/YCbCrForwardConverter{TPixel}.cs
index d775425c5c..301079b6ae 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Encoder/YCbCrForwardConverter{TPixel}.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Encoder/YCbCrForwardConverter{TPixel}.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Runtime.CompilerServices;
 
 using SixLabors.ImageSharp.Advanced;
diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index 0dcbd8fef7..b3f30f815f 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -547,7 +547,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         private void WriteDefineHuffmanTables(int componentCount)
         {
             // Table identifiers.
-            Span<byte> headers = stackalloc byte[] { 0x00, 0x10, 0x01, 0x11 };
+            Span<byte> headers = stackalloc byte[]
+            {
+                0x00,
+                0x10,
+                0x01,
+                0x11
+            };
 
             int markerlen = 2;
             HuffmanSpec[] specs = HuffmanSpec.TheHuffmanSpecs;
@@ -786,16 +792,37 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         private void WriteStartOfFrame(int width, int height, int componentCount)
         {
             // "default" to 4:2:0
-            Span<byte> subsamples = stackalloc byte[] { 0x22, 0x11, 0x11 };
-            Span<byte> chroma = stackalloc byte[] { 0x00, 0x01, 0x01 };
+            Span<byte> subsamples = stackalloc byte[]
+            {
+                0x22,
+                0x11,
+                0x11
+            };
+
+            Span<byte> chroma = stackalloc byte[]
+            {
+                0x00,
+                0x01,
+                0x01
+            };
 
             switch (this.subsample)
             {
                 case JpegSubsample.Ratio444:
-                    subsamples = stackalloc byte[] { 0x11, 0x11, 0x11 };
+                    subsamples = stackalloc byte[]
+                    {
+                        0x11,
+                        0x11,
+                        0x11
+                    };
                     break;
                 case JpegSubsample.Ratio420:
-                    subsamples = stackalloc byte[] { 0x22, 0x11, 0x11 };
+                    subsamples = stackalloc byte[]
+                    {
+                        0x22,
+                        0x11,
+                        0x11
+                    };
                     break;
             }
 
diff --git a/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs b/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
index 6ab0dd6576..1d0e280bd3 100644
--- a/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
+++ b/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Buffers.Binary;
 using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.MetaData;
diff --git a/src/ImageSharp/Formats/Png/Filters/UpFilter.cs b/src/ImageSharp/Formats/Png/Filters/UpFilter.cs
index c6a297e33a..5d9dc6a890 100644
--- a/src/ImageSharp/Formats/Png/Filters/UpFilter.cs
+++ b/src/ImageSharp/Formats/Png/Filters/UpFilter.cs
@@ -57,7 +57,8 @@ namespace SixLabors.ImageSharp.Formats.Png.Filters
             // Up(x) = Raw(x) - Prior(x)
             resultBaseRef = 2;
 
-            for (int x = 0; x < scanline.Length; /* Note: ++x happens in the body to avoid one add operation */) {
+            for (int x = 0; x < scanline.Length; /* Note: ++x happens in the body to avoid one add operation */)
+            {
                 byte scan = Unsafe.Add(ref scanBaseRef, x);
                 byte above = Unsafe.Add(ref prevBaseRef, x);
                 ++x;
diff --git a/src/ImageSharp/Formats/Png/PngConstants.cs b/src/ImageSharp/Formats/Png/PngConstants.cs
index 62a7b74aba..e1f978e1ac 100644
--- a/src/ImageSharp/Formats/Png/PngConstants.cs
+++ b/src/ImageSharp/Formats/Png/PngConstants.cs
@@ -26,7 +26,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// </summary>
         public static readonly IEnumerable<string> FileExtensions = new[] { "png" };
 
-        public static readonly byte[] HeaderBytes = {
+        public static readonly byte[] HeaderBytes =
+        {
              0x89, // Set the high bit.
              0x50, // P
              0x4E, // N
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 1cdee81a26..6ab609d5c0 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -31,20 +31,17 @@
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.1' OR '$(TargetFramework)' == 'net472' ">
     <DefineConstants>$(DefineConstants);SUPPORTS_EXTENDED_INTRINSICS</DefineConstants>
   </PropertyGroup>
-  
+
   <ItemGroup>
     <Compile Include="..\Shared\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
   </ItemGroup>
-  
+
   <ItemGroup>
+    <AdditionalFiles Include="..\..\standards\stylecop.json" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-beta.61" PrivateAssets="All" />
+    <PackageReference Include="SixLabors.Core" Version="1.0.0-beta0007" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
-    <PackageReference Include="SixLabors.Core" Version="1.0.0-dev000094" />
-    <AdditionalFiles Include="..\..\stylecop.json" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta007">
-      <PrivateAssets>All</PrivateAssets>
-    </PackageReference>
   </ItemGroup>
-  
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3'">
     <PackageReference Include="System.IO.UnmanagedMemoryStream" Version="4.3.0" />
@@ -52,14 +49,16 @@
     <PackageReference Include="System.Threading.Tasks.Parallel" Version="4.3.0" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>
-  
+
   <PropertyGroup>
-    <CodeAnalysisRuleSet>..\..\ImageSharp.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRuleSet>..\..\standards\SixLabors.ruleset</CodeAnalysisRuleSet>
     <RootNamespace>SixLabors.ImageSharp</RootNamespace>
   </PropertyGroup>
+
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
+
   <ItemGroup>
     <None Update="Formats\Jpeg\Components\Block8x8F.Generated.tt">
       <Generator>TextTemplatingFileGenerator</Generator>
@@ -122,6 +121,7 @@
       <Generator>TextTemplatingFileGenerator</Generator>
     </None>
   </ItemGroup>
+
   <ItemGroup>
     <Compile Update="Formats\Jpeg\Components\Block8x8F.Generated.cs">
       <DesignTime>True</DesignTime>
@@ -199,6 +199,7 @@
       <DependentUpon>PorterDuffFunctions.Generated.tt</DependentUpon>
     </Compile>
   </ItemGroup>
+
   <ItemGroup>
     <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
   </ItemGroup>
diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 0750e0368c..501ed5e69c 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -1,4 +1,4 @@
-// Copyright(c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.Primitives;
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
index 555cadafee..fb2a893d1c 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
@@ -5,14 +5,16 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
 {
     internal static class ExifConstants
     {
-        public static readonly byte[] LittleEndianByteOrderMarker = {
+        public static readonly byte[] LittleEndianByteOrderMarker =
+        {
             (byte)'I',
             (byte)'I',
             0x2A,
             0x00,
         };
 
-        public static readonly byte[] BigEndianByteOrderMarker = {
+        public static readonly byte[] BigEndianByteOrderMarker =
+        {
             (byte)'M',
             (byte)'M',
             0x00,
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
index e497fc7fa4..e999d00b86 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
@@ -238,7 +238,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
             LensMake,
             LensModel,
             LensSerialNumber
-          };
+        };
 
         /// <summary>
         /// The collection of GPS tags
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
index dd180b2997..415f6941ec 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
@@ -13,7 +13,12 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
     /// </summary>
     internal sealed class IccLut16TagDataEntry : IccTagDataEntry, IEquatable<IccLut16TagDataEntry>
     {
-        private static readonly float[,] IdentityMatrix = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
+        private static readonly float[,] IdentityMatrix =
+        {
+            { 1, 0, 0 },
+            { 0, 1, 0 },
+            { 0, 0, 1 }
+        };
 
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLut16TagDataEntry"/> class.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
index b345d14a54..04a49e316d 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
@@ -13,7 +13,12 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
     /// </summary>
     internal sealed class IccLut8TagDataEntry : IccTagDataEntry, IEquatable<IccLut8TagDataEntry>
     {
-        private static readonly float[,] IdentityMatrix = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
+        private static readonly float[,] IdentityMatrix =
+        {
+            { 1, 0, 0 },
+            { 0, 1, 0 },
+            { 0, 0, 1 }
+        };
 
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLut8TagDataEntry"/> class.
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
index 139dbfa10f..e784e3b5a6 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
index 5609e606d8..06c33d79c7 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
 using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
diff --git a/standards b/standards
new file mode 160000
index 0000000000..dd83f64963
--- /dev/null
+++ b/standards
@@ -0,0 +1 @@
+Subproject commit dd83f649638c6333984a757c01be6ec294e6b63c

From d062ffa064cdf1c7ef30d4188d13c0b9065a5c22 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 29 Jan 2019 10:16:31 +1100
Subject: [PATCH 016/223] Track input stream position on load. (#820)

---
 src/ImageSharp/IO/DoubleBufferedStreamReader.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
index 94a2f2cbfc..8530ecec52 100644
--- a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
+++ b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
@@ -42,6 +42,7 @@ namespace SixLabors.ImageSharp.IO
         public DoubleBufferedStreamReader(MemoryAllocator memoryAllocator, Stream stream)
         {
             this.stream = stream;
+            this.Position = (int)stream.Position;
             this.length = (int)stream.Length;
             this.managedBuffer = memoryAllocator.AllocateManagedByteBuffer(ChunkLength, AllocationOptions.Clean);
             this.bufferChunk = this.managedBuffer.Array;

From fb9e23020bf0882956ef9c509ba9dccbb09cd2f9 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Tue, 5 Feb 2019 02:41:26 +0100
Subject: [PATCH 017/223] Fix Decoding 8-Bit grayscale png's with alpha (#830)

---
 .../Formats/Png/PngScanlineProcessor.cs       |  3 +-
 .../Formats/Png/PngDecoderTests.cs            | 30 +++++++++++++++++++
 tests/ImageSharp.Tests/TestImages.cs          |  1 +
 tests/Images/Input/Png/rollsroyce.png         |  3 ++
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 tests/Images/Input/Png/rollsroyce.png

diff --git a/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs b/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
index 4242b2d554..40c2841176 100644
--- a/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
+++ b/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
@@ -240,9 +240,9 @@ namespace SixLabors.ImageSharp.Formats.Png
             else
             {
                 Rgba32 rgba32 = default;
+                int offset = 0;
                 for (int x = pixelOffset; x < header.Width; x += increment)
                 {
-                    int offset = x * bytesPerPixel;
                     byte luminance = Unsafe.Add(ref scanlineSpanRef, offset);
                     byte alpha = Unsafe.Add(ref scanlineSpanRef, offset + bytesPerSample);
                     rgba32.R = luminance;
@@ -252,6 +252,7 @@ namespace SixLabors.ImageSharp.Formats.Png
 
                     pixel.FromRgba32(rgba32);
                     Unsafe.Add(ref rowSpanRef, x) = pixel;
+                    offset += bytesPerPixel;
                 }
             }
         }
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index f51f9b6c5c..1452f233b6 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -67,6 +67,12 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             TestImages.Png.GrayTrns16BitInterlaced
         };
 
+        public static readonly string[] TestImagesGrayAlpha8Bit =
+            {
+                TestImages.Png.GrayAlpha8Bit,
+                TestImages.Png.GrayAlpha8Bit2
+            };
+
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
@@ -123,6 +129,18 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             }
         }
 
+        [Theory]
+        [WithFileCollection(nameof(TestImagesGrayAlpha8Bit), PixelTypes.Rgba32)]
+        public void Decoder_Gray8bitWithAlpha<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new PngDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, ImageComparer.Exact);
+            }
+        }
+
         [Theory]
         [WithFileCollection(nameof(TestImagesGray16Bit), PixelTypes.Rgb48)]
         public void Decode_Gray16Bit<TPixel>(TestImageProvider<TPixel> provider)
@@ -159,6 +177,18 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             }
         }
 
+        [Theory]
+        [WithFile(TestImages.Png.GrayAlpha8Bit2, PixelTypes)]
+        public void Decoder_CanDecodeGrey8bitWithAlpha<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new PngDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, ImageComparer.Exact);
+            }
+        }
+
         [Fact]
         public void Decode_IgnoreMetadataIsFalse_TextChunckIsRead()
         {
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index d83fe4907d..92773df7e4 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -29,6 +29,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Gray4Bpp = "Png/gray_4bpp.png";
             public const string Gray16Bit = "Png/gray-16.png";
             public const string GrayAlpha8Bit = "Png/gray-alpha-8.png";
+            public const string GrayAlpha8Bit2 = "Png/rollsroyce.png";
             public const string GrayAlpha16Bit = "Png/gray-alpha-16.png";
             public const string GrayTrns16BitInterlaced = "Png/gray-16-tRNS-interlaced.png";
             public const string Rgb24BppTrans = "Png/rgb-8-tRNS.png";
diff --git a/tests/Images/Input/Png/rollsroyce.png b/tests/Images/Input/Png/rollsroyce.png
new file mode 100644
index 0000000000..c2b9199ac6
--- /dev/null
+++ b/tests/Images/Input/Png/rollsroyce.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:90017d23999f41be7ac525648d8f435dcf8d1481ab98ebfd01a9ce87241e534f
+size 25400

From 07aa4f9316c5e487d83df9ef0f12e2241d27c5ef Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Tue, 5 Feb 2019 05:33:16 +0100
Subject: [PATCH 018/223] Respecting fileHeader Offset, skipping bytes if
 necessary (#819)

---
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs         | 11 +++++++++++
 .../ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs  | 12 ++++++++++++
 tests/ImageSharp.Tests/TestImages.cs                 |  1 +
 tests/Images/Input/Bmp/pal8offs.bmp                  |  3 +++
 4 files changed, 27 insertions(+)
 create mode 100644 tests/Images/Input/Bmp/pal8offs.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 6bfdfa3a29..496a6df4a2 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -1103,6 +1103,17 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
             this.infoHeader.VerifyDimensions();
 
+            int skipAmount = this.fileHeader.Offset - (int)this.stream.Position;
+            if ((skipAmount + (int)this.stream.Position) > this.stream.Length)
+            {
+                BmpThrowHelper.ThrowImageFormatException($"Invalid fileheader offset found. Offset is greater than the stream length.");
+            }
+
+            if (skipAmount > 0)
+            {
+                this.stream.Skip(skipAmount);
+            }
+
             return bytesPerColorMapEntry;
         }
     }
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 5d7d35dd58..e7b5aeaeae 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -150,6 +150,18 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
+        [Theory]
+        [WithFile(Pal8Offset, PixelTypes.Rgba32)]
+        public void BmpDecoder_RespectsFileHeaderOffset<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
         [Theory]
         [WithFile(F, CommonNonDefaultPixelTypes)]
         public void BmpDecoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 92773df7e4..b4b75bfd8a 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -218,6 +218,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
             public const string Os2v2 = "Bmp/pal8os2v2.bmp";
+            public const string Pal8Offset = "Bmp/pal8offs.bmp";
 
             // Bitmap images with compression type BITFIELDS
             public const string Rgb32bfdef = "Bmp/rgb32bfdef.bmp";
diff --git a/tests/Images/Input/Bmp/pal8offs.bmp b/tests/Images/Input/Bmp/pal8offs.bmp
new file mode 100644
index 0000000000..8734a5b1c3
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8offs.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:15ad578b6a6253334616b9e7e3a958f827b885eeffac1e3cf7e5247f96aca342
+size 9354

From 66f77952f7cfac680d6c1805a46c6dc7f37d34d3 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Thu, 7 Feb 2019 00:57:43 +0100
Subject: [PATCH 019/223] Fix Decoding interlaced grayscale (#831)

---
 .../Formats/Png/PngScanlineProcessor.cs       |  4 ++--
 .../Formats/Png/PngDecoderTests.cs            | 20 ++++++++++---------
 tests/ImageSharp.Tests/TestImages.cs          |  5 ++++-
 tests/Images/Input/Png/iftbbn0g01.png         |  3 +++
 tests/Images/Input/Png/iftbbn0g02.png         |  3 +++
 tests/Images/Input/Png/iftbbn0g04.png         |  3 +++
 6 files changed, 26 insertions(+), 12 deletions(-)
 create mode 100644 tests/Images/Input/Png/iftbbn0g01.png
 create mode 100644 tests/Images/Input/Png/iftbbn0g02.png
 create mode 100644 tests/Images/Input/Png/iftbbn0g04.png

diff --git a/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs b/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
index 40c2841176..c23694951d 100644
--- a/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
+++ b/src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
@@ -145,9 +145,9 @@ namespace SixLabors.ImageSharp.Formats.Png
             {
                 byte scaledLuminanceTrans = (byte)(luminanceTrans.PackedValue * scaleFactor);
                 Rgba32 rgba32 = default;
-                for (int x = pixelOffset; x < header.Width; x += increment)
+                for (int x = pixelOffset, o = 0; x < header.Width; x += increment, o++)
                 {
-                    byte luminance = (byte)(Unsafe.Add(ref scanlineSpanRef, x) * scaleFactor);
+                    byte luminance = (byte)(Unsafe.Add(ref scanlineSpanRef, o) * scaleFactor);
                     rgba32.R = luminance;
                     rgba32.G = luminance;
                     rgba32.B = luminance;
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index 1452f233b6..eca7a2543a 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -67,10 +67,12 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             TestImages.Png.GrayTrns16BitInterlaced
         };
 
-        public static readonly string[] TestImagesGrayAlpha8Bit =
+        public static readonly string[] TestImagesGray8BitInterlaced =
             {
-                TestImages.Png.GrayAlpha8Bit,
-                TestImages.Png.GrayAlpha8Bit2
+                TestImages.Png.GrayAlpha1BitInterlaced,
+                TestImages.Png.GrayAlpha2BitInterlaced,
+                TestImages.Png.Gray4BitInterlaced,
+                TestImages.Png.GrayAlpha8BitInterlaced
             };
 
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
@@ -130,8 +132,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
         }
 
         [Theory]
-        [WithFileCollection(nameof(TestImagesGrayAlpha8Bit), PixelTypes.Rgba32)]
-        public void Decoder_Gray8bitWithAlpha<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(TestImagesGray8BitInterlaced), PixelTypes.Rgba32)]
+        public void Decoder_Gray8bitInterlaced<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new PngDecoder()))
@@ -166,8 +168,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
         }
 
         [Theory]
-        [WithFile(TestImages.Png.Splash, PixelTypes)]
-        public void Decoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFile(TestImages.Png.GrayAlpha8BitInterlaced, PixelTypes)]
+        public void Decoder_CanDecodeGrey8bitWithAlpha<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new PngDecoder()))
@@ -178,8 +180,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
         }
 
         [Theory]
-        [WithFile(TestImages.Png.GrayAlpha8Bit2, PixelTypes)]
-        public void Decoder_CanDecodeGrey8bitWithAlpha<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFile(TestImages.Png.Splash, PixelTypes)]
+        public void Decoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new PngDecoder()))
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index b4b75bfd8a..51e2d084c6 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -29,7 +29,10 @@ namespace SixLabors.ImageSharp.Tests
             public const string Gray4Bpp = "Png/gray_4bpp.png";
             public const string Gray16Bit = "Png/gray-16.png";
             public const string GrayAlpha8Bit = "Png/gray-alpha-8.png";
-            public const string GrayAlpha8Bit2 = "Png/rollsroyce.png";
+            public const string GrayAlpha8BitInterlaced = "Png/rollsroyce.png";
+            public const string GrayAlpha1BitInterlaced = "Png/iftbbn0g01.png";
+            public const string GrayAlpha2BitInterlaced = "Png/iftbbn0g02.png";
+            public const string Gray4BitInterlaced = "Png/iftbbn0g04.png";
             public const string GrayAlpha16Bit = "Png/gray-alpha-16.png";
             public const string GrayTrns16BitInterlaced = "Png/gray-16-tRNS-interlaced.png";
             public const string Rgb24BppTrans = "Png/rgb-8-tRNS.png";
diff --git a/tests/Images/Input/Png/iftbbn0g01.png b/tests/Images/Input/Png/iftbbn0g01.png
new file mode 100644
index 0000000000..f11869beac
--- /dev/null
+++ b/tests/Images/Input/Png/iftbbn0g01.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1eea6f2448e9d3f4365b34d1f849c057c7199564f18cecad07c3a362926b11db
+size 214
diff --git a/tests/Images/Input/Png/iftbbn0g02.png b/tests/Images/Input/Png/iftbbn0g02.png
new file mode 100644
index 0000000000..a1e2e9f1e6
--- /dev/null
+++ b/tests/Images/Input/Png/iftbbn0g02.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:82324d48b769628d4d8a4b6e7830c6d7dc778e5656d6e1e7556f4e53737a1dfc
+size 211
diff --git a/tests/Images/Input/Png/iftbbn0g04.png b/tests/Images/Input/Png/iftbbn0g04.png
new file mode 100644
index 0000000000..64b662e352
--- /dev/null
+++ b/tests/Images/Input/Png/iftbbn0g04.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:47d393150de4cec7152f1ed61ea25bca9de628865e37ad735e7f162c58340916
+size 489

From a2c4b2d5d81a5ee8368431e2d5578715cc645bb7 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Mon, 11 Feb 2019 05:33:03 +0100
Subject: [PATCH 020/223] Add support for Decoding BI_ALPHABITFIELDS (#832)

* Adds support for BI_ALPHABITFIELDS

* Fix for decoding bitmaps with a less than full sized palette
---
 src/ImageSharp/Formats/Bmp/BmpCompression.cs  | 10 +++++--
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 17 ++++++++++--
 .../Formats/Bmp/BmpDecoderTests.cs            | 26 +++++++++++++++++++
 tests/ImageSharp.Tests/TestImages.cs          |  2 ++
 tests/Images/Input/Bmp/pal8os2sp.bmp          |  3 +++
 tests/Images/Input/Bmp/rgba32abf.bmp          |  3 +++
 6 files changed, 57 insertions(+), 4 deletions(-)
 create mode 100644 tests/Images/Input/Bmp/pal8os2sp.bmp
 create mode 100644 tests/Images/Input/Bmp/rgba32abf.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpCompression.cs b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
index 5f14d22436..be275019e6 100644
--- a/src/ImageSharp/Formats/Bmp/BmpCompression.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
@@ -34,7 +34,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// If the first byte is zero, the record has different meanings, depending
         /// on the second byte. If the second byte is zero, it is the end of the row,
         /// if it is one, it is the end of the image.
-        /// Not supported at the moment.
         /// </summary>
         RLE4 = 2,
 
@@ -54,6 +53,13 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// The bitmap contains a PNG image.
         /// Not supported at the moment.
         /// </summary>
-        PNG = 5
+        PNG = 5,
+
+        /// <summary>
+        /// Introduced with Windows CE.
+        /// Specifies that the bitmap is not compressed and that the color table consists of four DWORD color
+        /// masks that specify the red, green, blue, and alpha components of each pixel.
+        /// </summary>
+        BI_ALPHABITFIELDS = 6
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 496a6df4a2..d33ada2864 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -75,7 +75,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         /// <summary>
         /// The file header containing general information.
-        /// TODO: Why is this not used? We advance the stream but do not use the values parsed.
         /// </summary>
         private BmpFileHeader fileHeader;
 
@@ -163,6 +162,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                         break;
 
                     case BmpCompression.BitFields:
+                    case BmpCompression.BI_ALPHABITFIELDS:
                         this.ReadBitFields(pixels, inverted);
 
                         break;
@@ -947,7 +947,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 infoHeaderType = BmpInfoHeaderType.WinVersion3;
                 this.infoHeader = BmpInfoHeader.ParseV3(buffer);
 
-                // if the info header is BMP version 3 and the compression type is BITFIELDS,
+                // If the info header is BMP version 3 and the compression type is BITFIELDS,
                 // color masks for each color channel follow the info header.
                 if (this.infoHeader.Compression == BmpCompression.BitFields)
                 {
@@ -958,6 +958,16 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     this.infoHeader.GreenMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4));
                     this.infoHeader.BlueMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4));
                 }
+                else if (this.infoHeader.Compression == BmpCompression.BI_ALPHABITFIELDS)
+                {
+                    byte[] bitfieldsBuffer = new byte[16];
+                    this.stream.Read(bitfieldsBuffer, 0, 16);
+                    Span<byte> data = bitfieldsBuffer.AsSpan<byte>();
+                    this.infoHeader.RedMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4));
+                    this.infoHeader.GreenMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4));
+                    this.infoHeader.BlueMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4));
+                    this.infoHeader.AlphaMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(12, 4));
+                }
             }
             else if (headerSize == BmpInfoHeader.AdobeV3Size)
             {
@@ -1078,6 +1088,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     int colorMapSizeBytes = this.fileHeader.Offset - BmpFileHeader.Size - this.infoHeader.HeaderSize;
                     int colorCountForBitDepth = ImageMaths.GetColorCountForBitDepth(this.infoHeader.BitsPerPixel);
                     bytesPerColorMapEntry = colorMapSizeBytes / colorCountForBitDepth;
+
+                    // Edge case for less-than-full-sized palette: bytesPerColorMapEntry should be at least 3.
+                    bytesPerColorMapEntry = Math.Max(bytesPerColorMapEntry, 3);
                     colorMapSize = colorMapSizeBytes;
                 }
             }
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index e7b5aeaeae..ad47ed1e7e 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -60,6 +60,20 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
+        [Theory]
+        [WithFile(RgbaAlphaBitfields, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeAlphaBitfields<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+
+                // TODO: Neither System.Drawing nor MagickReferenceDecoder decode this file.
+                // image.CompareToOriginal(provider);
+            }
+        }
+
         [Theory]
         [WithFile(Bit32Rgba, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeBitmap_WithAlphaChannel<TPixel>(TestImageProvider<TPixel> provider)
@@ -114,6 +128,18 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
+        [Theory]
+        [WithFile(LessThanFullSizedPalette, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeLessThanFullPalete<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
         [Theory]
         [WithFile(Rgba32bf56, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeAdobeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 51e2d084c6..3a497683ad 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -221,6 +221,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
             public const string Os2v2 = "Bmp/pal8os2v2.bmp";
+            public const string LessThanFullSizedPalette = "Bmp/pal8os2sp.bmp";
             public const string Pal8Offset = "Bmp/pal8offs.bmp";
 
             // Bitmap images with compression type BITFIELDS
@@ -232,6 +233,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Issue735 = "Bmp/issue735.bmp";
             public const string Rgba32bf56 = "Bmp/rgba32h56.bmp";
             public const string Rgba321010102 = "Bmp/rgba32-1010102.bmp";
+            public const string RgbaAlphaBitfields = "Bmp/rgba32abf.bmp";
 
             public static readonly string[] BitFields 
             = {
diff --git a/tests/Images/Input/Bmp/pal8os2sp.bmp b/tests/Images/Input/Bmp/pal8os2sp.bmp
new file mode 100644
index 0000000000..7d3e89d84c
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8os2sp.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e58eb53dcbf1c0920ad5af8d07f576ee794c1c5d051e1d950060ab6f6f253f50
+size 8974
diff --git a/tests/Images/Input/Bmp/rgba32abf.bmp b/tests/Images/Input/Bmp/rgba32abf.bmp
new file mode 100644
index 0000000000..0f4c4b76ec
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgba32abf.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1d2183466e05c768b5a9d2ce5d132d72db2272bb331c7b27560d24f197f4165e
+size 32582

From a33255c19c893b659066cecf5804d5121e497d26 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Mon, 11 Feb 2019 23:25:00 +1100
Subject: [PATCH 021/223] Reorder target frameworks (#833)

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj | 2 +-
 src/ImageSharp/ImageSharp.csproj                 | 2 +-
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index f4906d25e3..638687ae55 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -10,7 +10,7 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-    <TargetFrameworks>netstandard1.3;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 6ab609d5c0..f7f9e1d5f4 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -10,7 +10,7 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-    <TargetFrameworks>netstandard1.3;netstandard2.0;netcoreapp2.1;net472</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <AssemblyName>SixLabors.ImageSharp</AssemblyName>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index e20f1514cc..73f97bab38 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net462;net472;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From dae7c7a2d88d887a8206e2183eccf4db2f8a568d Mon Sep 17 00:00:00 2001
From: Robin Krom <robin.krom@gmail.com>
Date: Fri, 15 Feb 2019 10:08:21 +0100
Subject: [PATCH 022/223] Some changes to make the usages of GDI in benchmarks
 and tests more stable, this should hopefully prevent "a generic error
 occurred in GDI+". Hopefully I didn't miss one... (#835)

---
 .../Drawing/DrawBeziers.cs                    |  16 +--
 .../Drawing/DrawLines.cs                      |  14 ++-
 .../Drawing/DrawPolygon.cs                    |  14 ++-
 .../ImageSharp.Benchmarks/Drawing/DrawText.cs |   7 +-
 .../Drawing/DrawTextOutline.cs                |  12 +-
 .../Drawing/FillWithPattern.cs                |   6 +-
 .../ReferenceCodecs/SystemDrawingBridge.cs    | 113 ++++++++++--------
 7 files changed, 104 insertions(+), 78 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
index edbbceb628..34dd9d4dc8 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
@@ -26,13 +26,15 @@ namespace SixLabors.ImageSharp.Benchmarks
                 {
                     graphics.InterpolationMode = InterpolationMode.Default;
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    Pen pen = new Pen(System.Drawing.Color.HotPink, 10);
-                    graphics.DrawBeziers(pen, new[] {
-                        new PointF(10, 500),
-                        new PointF(30, 10),
-                        new PointF(240, 30),
-                        new PointF(300, 500)
-                    });
+                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                    {
+                        graphics.DrawBeziers(pen, new[] {
+                                                                new PointF(10, 500),
+                                                                new PointF(30, 10),
+                                                                new PointF(240, 30),
+                                                                new PointF(300, 500)
+                                                            });
+                    }
                 }
 
                 using (MemoryStream ms = new MemoryStream())
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
index 8946835993..091f367622 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
@@ -26,12 +26,14 @@ namespace SixLabors.ImageSharp.Benchmarks
                 {
                     graphics.InterpolationMode = InterpolationMode.Default;
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    var pen = new Pen(System.Drawing.Color.HotPink, 10);
-                    graphics.DrawLines(pen, new[] {
-                        new PointF(10, 10),
-                        new PointF(550, 50),
-                        new PointF(200, 400)
-                    });
+                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                    {
+                        graphics.DrawLines(pen, new[] {
+                                                              new PointF(10, 10),
+                                                              new PointF(550, 50),
+                                                              new PointF(200, 400)
+                                                          });
+                    }
                 }
 
                 using (var ms = new MemoryStream())
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
index 5fbd9f1123..ab8a7134e7 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
@@ -26,12 +26,14 @@ namespace SixLabors.ImageSharp.Benchmarks
                 {
                     graphics.InterpolationMode = InterpolationMode.Default;
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    Pen pen = new Pen(System.Drawing.Color.HotPink, 10);
-                    graphics.DrawPolygon(pen, new[] {
-                        new PointF(10, 10),
-                        new PointF(550, 50),
-                        new PointF(200, 400)
-                    });
+                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                    {
+                        graphics.DrawPolygon(pen, new[] {
+                                                                new PointF(10, 10),
+                                                                new PointF(550, 50),
+                                                                new PointF(200, 400)
+                                                            });
+                    }
                 }
 
                 using (MemoryStream ms = new MemoryStream())
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
index 624b54278a..60c58dadc9 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
@@ -35,9 +35,10 @@ namespace SixLabors.ImageSharp.Benchmarks
                 {
                     graphics.InterpolationMode = InterpolationMode.Default;
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    Pen pen = new Pen(System.Drawing.Color.HotPink, 10);
-                    var font = new Font("Arial", 12, GraphicsUnit.Point);
-                    graphics.DrawString(TextToRender, font, System.Drawing.Brushes.HotPink, new RectangleF(10, 10, 780, 780));
+                    using (var font = new Font("Arial", 12, GraphicsUnit.Point))
+                    {
+                        graphics.DrawString(TextToRender, font, System.Drawing.Brushes.HotPink, new RectangleF(10, 10, 780, 780));
+                    }
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
index ba6d055e37..2d6505a91f 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
@@ -34,11 +34,13 @@ namespace SixLabors.ImageSharp.Benchmarks
                 {
                     graphics.InterpolationMode = InterpolationMode.Default;
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    Pen pen = new Pen(System.Drawing.Color.HotPink, 10);
-                    var font = new Font("Arial", 12, GraphicsUnit.Point);
-                    var gp = new GraphicsPath();
-                    gp.AddString(TextToRender, font.FontFamily, (int)font.Style, font.Size, new RectangleF(10, 10, 780, 780), new StringFormat());
-                    graphics.DrawPath(pen, gp);
+                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                    using (var font = new Font("Arial", 12, GraphicsUnit.Point))
+                    using (var gp = new GraphicsPath())
+                    {
+                        gp.AddString(TextToRender, font.FontFamily, (int)font.Style, font.Size, new RectangleF(10, 10, 780, 780), new StringFormat());
+                        graphics.DrawPath(pen, gp);
+                    }
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
index 5f8f2ff064..3723619882 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
@@ -26,8 +26,10 @@ namespace SixLabors.ImageSharp.Benchmarks
                 using (Graphics graphics = Graphics.FromImage(destination))
                 {
                     graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    HatchBrush brush = new HatchBrush(HatchStyle.BackwardDiagonal, Color.HotPink);
-                    graphics.FillRectangle(brush, new Rectangle(0, 0, 800, 800)); // can't find a way to flood fill with a brush
+                    using (var brush = new HatchBrush(HatchStyle.BackwardDiagonal, Color.HotPink))
+                    {
+                        graphics.FillRectangle(brush, new Rectangle(0, 0, 800, 800)); // can't find a way to flood fill with a brush
+                    }
                 }
                 using (MemoryStream ms = new MemoryStream())
                 {
diff --git a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingBridge.cs b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingBridge.cs
index 7e87c23db5..79c19f2be7 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingBridge.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingBridge.cs
@@ -39,32 +39,39 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
             }
 
             BitmapData data = bmp.LockBits(fullRect, ImageLockMode.ReadWrite, bmp.PixelFormat);
-            byte* sourcePtrBase = (byte*)data.Scan0;
+            var image = new Image<TPixel>(w, h);
+            try
+            {
+                byte* sourcePtrBase = (byte*)data.Scan0;
 
-            long sourceRowByteCount = data.Stride;
-            long destRowByteCount = w * sizeof(Bgra32);
+                long sourceRowByteCount = data.Stride;
+                long destRowByteCount = w * sizeof(Bgra32);
 
-            var image = new Image<TPixel>(w, h);
-            Configuration configuration = image.GetConfiguration();
+                Configuration configuration = image.GetConfiguration();
 
-            using (IMemoryOwner<Bgra32> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgra32>(w))
-            {
-                fixed (Bgra32* destPtr = &workBuffer.GetReference())
+                using (IMemoryOwner<Bgra32> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgra32>(w))
                 {
-                    for (int y = 0; y < h; y++)
+                    fixed (Bgra32* destPtr = &workBuffer.GetReference())
                     {
-                        Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
-
-                        byte* sourcePtr = sourcePtrBase + (data.Stride * y);
-
-                        Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
-                        PixelOperations<TPixel>.Instance.FromBgra32(
-                            configuration,
-                            workBuffer.GetSpan().Slice(0, w),
-                            row);
+                        for (int y = 0; y < h; y++)
+                        {
+                            Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
+
+                            byte* sourcePtr = sourcePtrBase + (data.Stride * y);
+
+                            Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
+                            PixelOperations<TPixel>.Instance.FromBgra32(
+                                configuration,
+                                workBuffer.GetSpan().Slice(0, w),
+                                row);
+                        }
                     }
                 }
             }
+            finally
+            {
+                bmp.UnlockBits(data);
+            }
 
             return image;
         }
@@ -91,33 +98,36 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
             }
 
             BitmapData data = bmp.LockBits(fullRect, ImageLockMode.ReadWrite, bmp.PixelFormat);
-            byte* sourcePtrBase = (byte*)data.Scan0;
+            var image = new Image<TPixel>(w, h);
+            try
+            {
+                byte* sourcePtrBase = (byte*)data.Scan0;
 
-            long sourceRowByteCount = data.Stride;
-            long destRowByteCount = w * sizeof(Bgr24);
+                long sourceRowByteCount = data.Stride;
+                long destRowByteCount = w * sizeof(Bgr24);
 
-            var image = new Image<TPixel>(w, h);
-            Configuration configuration = image.GetConfiguration();
+                Configuration configuration = image.GetConfiguration();
 
-            using (IMemoryOwner<Bgr24> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgr24>(w))
-            {
-                fixed (Bgr24* destPtr = &workBuffer.GetReference())
+                using (IMemoryOwner<Bgr24> workBuffer = Configuration.Default.MemoryAllocator.Allocate<Bgr24>(w))
                 {
-                    for (int y = 0; y < h; y++)
+                    fixed (Bgr24* destPtr = &workBuffer.GetReference())
                     {
-                        Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
+                        for (int y = 0; y < h; y++)
+                        {
+                            Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
 
-                        byte* sourcePtr = sourcePtrBase + (data.Stride * y);
+                            byte* sourcePtr = sourcePtrBase + (data.Stride * y);
 
-                        Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
-                        PixelOperations<TPixel>.Instance.FromBgr24(
-                            configuration,
-                            workBuffer.GetSpan().Slice(0, w),
-                            row);
+                            Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
+                            PixelOperations<TPixel>.Instance.FromBgr24(configuration, workBuffer.GetSpan().Slice(0, w), row);
+                        }
                     }
                 }
             }
-
+            finally
+            {
+                bmp.UnlockBits(data);
+            }
             return image;
         }
 
@@ -131,27 +141,32 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
             var resultBitmap = new Bitmap(w, h, PixelFormat.Format32bppArgb);
             var fullRect = new Rectangle(0, 0, w, h);
             BitmapData data = resultBitmap.LockBits(fullRect, ImageLockMode.ReadWrite, resultBitmap.PixelFormat);
-            byte* destPtrBase = (byte*)data.Scan0;
+            try
+            {
+                byte* destPtrBase = (byte*)data.Scan0;
 
-            long destRowByteCount = data.Stride;
-            long sourceRowByteCount = w * sizeof(Bgra32);
+                long destRowByteCount = data.Stride;
+                long sourceRowByteCount = w * sizeof(Bgra32);
 
-            using (IMemoryOwner<Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate<Bgra32>(w))
-            {
-                fixed (Bgra32* sourcePtr = &workBuffer.GetReference())
+                using (IMemoryOwner<Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate<Bgra32>(w))
                 {
-                    for (int y = 0; y < h; y++)
+                    fixed (Bgra32* sourcePtr = &workBuffer.GetReference())
                     {
-                        Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
-                        PixelOperations<TPixel>.Instance.ToBgra32(configuration, row, workBuffer.GetSpan());
-                        byte* destPtr = destPtrBase + (data.Stride * y);
-
-                        Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
+                        for (int y = 0; y < h; y++)
+                        {
+                            Span<TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
+                            PixelOperations<TPixel>.Instance.ToBgra32(configuration, row, workBuffer.GetSpan());
+                            byte* destPtr = destPtrBase + (data.Stride * y);
+
+                            Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
+                        }
                     }
                 }
             }
-
-            resultBitmap.UnlockBits(data);
+            finally
+            {
+                resultBitmap.UnlockBits(data);
+            }
 
             return resultBitmap;
         }

From 19270664b0e386e718c582759218bd606cbeef32 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 15 Feb 2019 21:55:16 +1100
Subject: [PATCH 023/223] Remove hardcoded subsampling. Fix #817 (#834)

---
 .../Jpeg/Components/Decoder/JpegComponent.cs  | 38 +++++--------------
 .../Formats/Jpg/JpegDecoderTests.Images.cs    |  1 +
 tests/ImageSharp.Tests/TestImages.cs          |  3 +-
 tests/Images/External                         |  2 +-
 .../Jpg/baseline/ycck-subsample-1222.jpg      |  3 ++
 5 files changed, 17 insertions(+), 30 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/baseline/ycck-subsample-1222.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
index ef03582d69..cfed5d535f 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
@@ -2,8 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.Memory;
@@ -12,9 +10,9 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Represents a single frame component
+    /// Represents a single frame component.
     /// </summary>
-    internal class JpegComponent : IDisposable, IJpegComponent
+    internal sealed class JpegComponent : IDisposable, IJpegComponent
     {
         private readonly MemoryAllocator memoryAllocator;
 
@@ -31,12 +29,12 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         /// <summary>
-        /// Gets the component Id
+        /// Gets the component Id.
         /// </summary>
         public byte Id { get; }
 
         /// <summary>
-        /// Gets or sets DC coefficient predictor
+        /// Gets or sets DC coefficient predictor.
         /// </summary>
         public int DcPredictor { get; set; }
 
@@ -69,22 +67,22 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public Size SamplingFactors { get; set; }
 
         /// <summary>
-        /// Gets the number of blocks per line
+        /// Gets the number of blocks per line.
         /// </summary>
         public int WidthInBlocks { get; private set; }
 
         /// <summary>
-        /// Gets the number of blocks per column
+        /// Gets the number of blocks per column.
         /// </summary>
         public int HeightInBlocks { get; private set; }
 
         /// <summary>
-        /// Gets or sets the index for the DC Huffman table
+        /// Gets or sets the index for the DC Huffman table.
         /// </summary>
         public int DCHuffmanTableId { get; set; }
 
         /// <summary>
-        /// Gets or sets the index for the AC Huffman table
+        /// Gets or sets the index for the AC Huffman table.
         /// </summary>
         public int ACHuffmanTableId { get; set; }
 
@@ -109,24 +107,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int blocksPerColumnForMcu = this.Frame.McusPerColumn * this.VerticalSamplingFactor;
             this.SizeInBlocks = new Size(blocksPerLineForMcu, blocksPerColumnForMcu);
 
-            // For 4-component images (either CMYK or YCbCrK), we only support two
-            // hv vectors: [0x11 0x11 0x11 0x11] and [0x22 0x11 0x11 0x22].
-            // Theoretically, 4-component JPEG images could mix and match hv values
-            // but in practice, those two combinations are the only ones in use,
-            // and it simplifies the applyBlack code below if we can assume that:
-            // - for CMYK, the C and K channels have full samples, and if the M
-            // and Y channels subsample, they subsample both horizontally and
-            // vertically.
-            // - for YCbCrK, the Y and K channels have full samples.
-            if (this.Index == 0 || this.Index == 3)
-            {
-                this.SubSamplingDivisors = new Size(1, 1);
-            }
-            else
-            {
-                JpegComponent c0 = this.Frame.Components[0];
-                this.SubSamplingDivisors = c0.SamplingFactors.DivideBy(this.SamplingFactors);
-            }
+            JpegComponent c0 = this.Frame.Components[0];
+            this.SubSamplingDivisors = c0.SamplingFactors.DivideBy(this.SamplingFactors);
 
             int totalNumberOfBlocks = blocksPerColumnForMcu * (blocksPerLineForMcu + 1);
             int width = this.WidthInBlocks + 1;
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 03f1826edd..9f34d7d09b 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -21,6 +21,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Baseline.Jpeg444,
                 TestImages.Jpeg.Baseline.Bad.BadEOF,
                 TestImages.Jpeg.Baseline.MultiScanBaselineCMYK,
+                TestImages.Jpeg.Baseline.YcckSubsample1222,
                 TestImages.Jpeg.Baseline.Bad.BadRST,
                 TestImages.Jpeg.Issues.MultiHuffmanBaseline394,
                 TestImages.Jpeg.Issues.ExifDecodeOutOfRange694,
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 3a497683ad..e28caf6277 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -140,13 +140,14 @@ namespace SixLabors.ImageSharp.Tests
                 public const string MultiScanBaselineCMYK = "Jpg/baseline/MultiScanBaselineCMYK.jpg";
                 public const string Ratio1x1 = "Jpg/baseline/ratio-1x1.jpg";
                 public const string Testorig12bit = "Jpg/baseline/testorig12.jpg";
+                public const string YcckSubsample1222 = "Jpg/baseline/ycck-subsample-1222.jpg";
 
                 public static readonly string[] All =
                 {
                     Cmyk, Ycck, Exif, Floorplan,
                     Calliphora, Turtle, GammaDalaiLamaGray,
                     Hiyamugi, Jpeg400, Jpeg420Exif, Jpeg444,
-                    Ratio1x1, Testorig12bit
+                    Ratio1x1, Testorig12bit, YcckSubsample1222
                 };
             }
 
diff --git a/tests/Images/External b/tests/Images/External
index 74995302e3..32dc8aec11 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 74995302e3c9a5913f1cf09d71b15f888d0ec022
+Subproject commit 32dc8aec1109b681f056264e6bde1f3a76f08aba
diff --git a/tests/Images/Input/Jpg/baseline/ycck-subsample-1222.jpg b/tests/Images/Input/Jpg/baseline/ycck-subsample-1222.jpg
new file mode 100644
index 0000000000..17c23f1358
--- /dev/null
+++ b/tests/Images/Input/Jpg/baseline/ycck-subsample-1222.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ca7c16a2984d14ebc483780d9d1e8c131eca01d89f53512cc7add538c93a38c6
+size 31527

From 1054f842531ae2f6078e10a86c259ec24307345a Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sun, 17 Feb 2019 22:05:16 +1100
Subject: [PATCH 024/223] Jpeg Fuzz Fixes (#836)

* Nomalize jpeg exceptions. Fix #821

* Fix #822

* Fix #823

* Check for correct QT index. Touch #824

* Check DHT props. Touch #824

* Limit sampling factors to 1 & 2. Touch #824

* Add already fixed image 4. Touch #824

* Check for excessive code lengths. Touch #824

* Add already fixed image 6. Touch #824

* Lint progressive scan details. Touch #824

* Add already fixed image 8. Fix #824

* Remove duplicate per-block checks

* Add already fixed image 1. Touch #825

* Don't throw on bad JFIF density units.

* Add already fixed image 3. Touch #825

* Add already fixed image 4. Fix #825

* Check SOFn marker length. Touch #826

* Add already fixed image 2. Touch #826

* Add already fixed image 3. Fix #826

* Add fixed already fixed image. Fix #827

* Revert unneeded bounds check introduced in #804
---
 .../Jpeg/Components/Decoder/HuffmanTable.cs   | 22 ++---
 .../Jpeg/Components/Decoder/JFifMarker.cs     | 19 ++--
 .../Jpeg/Components/Decoder/JpegComponent.cs  | 21 +++++
 .../Jpeg/Components/Decoder/JpegFrame.cs      |  2 +-
 .../Jpeg/Components/Decoder/ScanDecoder.cs    | 62 +++++++++++--
 .../Formats/Jpeg/JpegDecoderCore.cs           | 92 ++++++++++++++-----
 .../Formats/Jpeg/JpegThrowHelper.cs           | 35 ++++---
 .../Formats/Jpg/JpegDecoderTests.Baseline.cs  | 19 +---
 .../Formats/Jpg/JpegDecoderTests.Images.cs    | 28 ++++++
 tests/ImageSharp.Tests/TestImages.cs          | 29 +++++-
 tests/Images/External                         |  2 +-
 ...ticalEOF .jpg => Issue214-CriticalEOF.jpg} |  0
 .../Issue797-NullReferenceException.jpg}      |  0
 .../Issue798-AccessViolationException.jpg     |  0
 .../fuzz/Issue821-DivideByZeroException.jpg   |  3 +
 .../fuzz/Issue822-DivideByZeroException.jpg   |  3 +
 .../fuzz/Issue823-NullReferenceException.jpg  |  3 +
 .../Issue824-IndexOutOfRangeException-A.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-B.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-C.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-D.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-E.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-F.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-G.jpg   |  3 +
 .../Issue824-IndexOutOfRangeException-H.jpg   |  3 +
 ...Issue825-ArgumentOutOfRangeException-A.jpg |  3 +
 ...Issue825-ArgumentOutOfRangeException-B.jpg |  3 +
 ...Issue825-ArgumentOutOfRangeException-C.jpg |  3 +
 ...Issue825-ArgumentOutOfRangeException-D.jpg |  3 +
 .../fuzz/Issue826-ArgumentException-A.jpg     |  3 +
 .../fuzz/Issue826-ArgumentException-B.jpg     |  3 +
 .../fuzz/Issue826-ArgumentException-C.jpg     |  3 +
 .../Issue827-AccessViolationException.jpg     |  3 +
 33 files changed, 303 insertions(+), 85 deletions(-)
 rename tests/Images/Input/Jpg/issues/{Issue214-CriticalEOF .jpg => Issue214-CriticalEOF.jpg} (100%)
 rename tests/Images/Input/Jpg/issues/{Issue797-InvalidImage.jpg => fuzz/Issue797-NullReferenceException.jpg} (100%)
 rename tests/Images/Input/Jpg/issues/{ => fuzz}/Issue798-AccessViolationException.jpg (100%)
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue821-DivideByZeroException.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue822-DivideByZeroException.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue823-NullReferenceException.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-A.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-B.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-C.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-D.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-E.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-F.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-G.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-H.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-A.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-B.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-C.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-D.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue826-ArgumentException-A.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue826-ArgumentException-B.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue826-ArgumentException-C.jpg
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue827-AccessViolationException.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index 9e11981b12..90b3624651 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -50,10 +50,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="values">The huffman values</param>
         public HuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
         {
-            // We do some bounds checks in the code here to protect against AccessViolationExceptions
-            const int HuffCodeLength = 257;
-            const int MaxSizeLength = HuffCodeLength - 1;
-            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(HuffCodeLength))
+            const int Length = 257;
+            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(Length))
             {
                 ref short huffcodeRef = ref MemoryMarshal.GetReference(huffcode.GetSpan());
                 ref byte codeLengthsRef = ref MemoryMarshal.GetReference(codeLengths);
@@ -65,7 +63,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 for (short i = 1; i < 17; i++)
                 {
                     byte length = Unsafe.Add(ref codeLengthsRef, i);
-                    for (short j = 0; j < length && x < MaxSizeLength; j++)
+                    for (short j = 0; j < length; j++)
                     {
                         Unsafe.Add(ref sizesRef, x++) = i;
                     }
@@ -86,7 +84,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                     Unsafe.Add(ref valOffsetRef, k) = (int)(si - code);
                     if (Unsafe.Add(ref sizesRef, si) == k)
                     {
-                        while (Unsafe.Add(ref sizesRef, si) == k && si < HuffCodeLength)
+                        while (Unsafe.Add(ref sizesRef, si) == k)
                         {
                             Unsafe.Add(ref huffcodeRef, si++) = (short)code++;
                         }
@@ -103,19 +101,19 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 // Generate non-spec lookup tables to speed up decoding.
                 const int FastBits = ScanDecoder.FastBits;
                 ref byte lookaheadRef = ref this.Lookahead[0];
-                const uint MaxFastLength = 1 << FastBits;
-                Unsafe.InitBlockUnaligned(ref lookaheadRef, 0xFF, MaxFastLength); // Flag for non-accelerated
+                Unsafe.InitBlockUnaligned(ref lookaheadRef, 0xFF, 1 << FastBits); // Flag for non-accelerated
 
                 for (int i = 0; i < si; i++)
                 {
                     int size = Unsafe.Add(ref sizesRef, i);
                     if (size <= FastBits)
                     {
-                        int huffCode = Unsafe.Add(ref huffcodeRef, i) << (FastBits - size);
-                        int max = 1 << (FastBits - size);
-                        for (int left = 0; left < max; left++)
+                        int fastOffset = FastBits - size;
+                        int fastCode = Unsafe.Add(ref huffcodeRef, i) << fastOffset;
+                        int fastMax = 1 << fastOffset;
+                        for (int left = 0; left < fastMax; left++)
                         {
-                            Unsafe.Add(ref lookaheadRef, huffCode + left) = (byte)i;
+                            Unsafe.Add(ref lookaheadRef, fastCode + left) = (byte)i;
                         }
                     }
                 }
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
index c51a2f4da5..76f0e2cb51 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
@@ -27,12 +27,20 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="yDensity">The vertical pixel density</param>
         private JFifMarker(byte majorVersion, byte minorVersion, byte densityUnits, short xDensity, short yDensity)
         {
-            Guard.MustBeGreaterThan(xDensity, 0, nameof(xDensity));
-            Guard.MustBeGreaterThan(yDensity, 0, nameof(yDensity));
-            Guard.MustBeBetweenOrEqualTo(densityUnits, 0, 2, nameof(densityUnits));
+            if (xDensity <= 0)
+            {
+                JpegThrowHelper.ThrowImageFormatException($"X-Density {xDensity} must be greater than 0.");
+            }
+
+            if (yDensity <= 0)
+            {
+                JpegThrowHelper.ThrowImageFormatException($"Y-Density {yDensity} must be greater than 0.");
+            }
 
             this.MajorVersion = majorVersion;
             this.MinorVersion = minorVersion;
+
+            // LibJpeg and co will simply cast and not try to enforce a range.
             this.DensityUnits = (PixelResolutionUnit)densityUnits;
             this.XDensity = xDensity;
             this.YDensity = yDensity;
@@ -104,10 +112,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is JFifMarker other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is JFifMarker other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
index cfed5d535f..ac24f4ca58 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
@@ -21,9 +21,25 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             this.memoryAllocator = memoryAllocator;
             this.Frame = frame;
             this.Id = id;
+
+            // Valid sampling factors are 1..2
+            if (horizontalFactor == 0
+                || verticalFactor == 0
+                || horizontalFactor > 2
+                || verticalFactor > 2)
+            {
+                JpegThrowHelper.ThrowBadSampling();
+            }
+
             this.HorizontalSamplingFactor = horizontalFactor;
             this.VerticalSamplingFactor = verticalFactor;
             this.SamplingFactors = new Size(this.HorizontalSamplingFactor, this.VerticalSamplingFactor);
+
+            if (quantizationTableIndex > 3)
+            {
+                JpegThrowHelper.ThrowBadQuantizationTable();
+            }
+
             this.QuantizationTableIndex = quantizationTableIndex;
             this.Index = index;
         }
@@ -110,6 +126,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             JpegComponent c0 = this.Frame.Components[0];
             this.SubSamplingDivisors = c0.SamplingFactors.DivideBy(this.SamplingFactors);
 
+            if (this.SubSamplingDivisors.Width == 0 || this.SubSamplingDivisors.Height == 0)
+            {
+                JpegThrowHelper.ThrowBadSampling();
+            }
+
             int totalNumberOfBlocks = blocksPerColumnForMcu * (blocksPerLineForMcu + 1);
             int width = this.WidthInBlocks + 1;
             int height = totalNumberOfBlocks / width;
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
index 36a3dc2d26..33a7c68baf 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             {
                 for (int i = 0; i < this.Components.Length; i++)
                 {
-                    this.Components[i].Dispose();
+                    this.Components[i]?.Dispose();
                 }
 
                 this.Components = null;
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
index a1c1b023e4..070652a9f9 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
@@ -270,8 +270,60 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             }
         }
 
+        private void CheckProgressiveData()
+        {
+            // Validate successive scan parameters.
+            // Logic has been adapted from libjpeg.
+            // See Table B.3 – Scan header parameter size and values. itu-t81.pdf
+            bool invalid = false;
+            if (this.spectralStart == 0)
+            {
+                if (this.spectralEnd != 0)
+                {
+                    invalid = true;
+                }
+            }
+            else
+            {
+                // Need not check Ss/Se < 0 since they came from unsigned bytes.
+                if (this.spectralEnd < this.spectralStart || this.spectralEnd > 63)
+                {
+                    invalid = true;
+                }
+
+                // AC scans may have only one component.
+                if (this.componentsLength != 1)
+                {
+                    invalid = true;
+                }
+            }
+
+            if (this.successiveHigh != 0)
+            {
+                // Successive approximation refinement scan: must have Al = Ah-1.
+                if (this.successiveHigh - 1 != this.successiveLow)
+                {
+                    invalid = true;
+                }
+            }
+
+            // TODO: How does this affect 12bit jpegs.
+            // According to libjpeg the range covers 8bit only?
+            if (this.successiveLow > 13)
+            {
+                invalid = true;
+            }
+
+            if (invalid)
+            {
+                JpegThrowHelper.ThrowBadProgressiveScan(this.spectralStart, this.spectralEnd, this.successiveHigh, this.successiveLow);
+            }
+        }
+
         private void ParseProgressiveData()
         {
+            this.CheckProgressiveData();
+
             if (this.componentsLength == 1)
             {
                 this.ParseProgressiveDataNonInterleaved();
@@ -483,11 +535,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             ref Block8x8 block,
             ref HuffmanTable dcTable)
         {
-            if (this.spectralEnd != 0)
-            {
-                JpegThrowHelper.ThrowImageFormatException("Can't merge DC and AC.");
-            }
-
             this.CheckBits();
 
             ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
@@ -518,11 +565,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             ref HuffmanTable acTable,
             ref short fastACRef)
         {
-            if (this.spectralStart == 0)
-            {
-                JpegThrowHelper.ThrowImageFormatException("Can't merge DC and AC.");
-            }
-
             ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
 
             if (this.successiveHigh == 0)
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 06c844d58e..9bcfd9ff64 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -255,7 +255,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             var fileMarker = new JpegFileMarker(this.markerBuffer[1], 0);
             if (fileMarker.Marker != JpegConstants.Markers.SOI)
             {
-                throw new ImageFormatException("Missing SOI marker.");
+                JpegThrowHelper.ThrowImageFormatException("Missing SOI marker.");
             }
 
             this.InputStream.Read(this.markerBuffer, 0, 2);
@@ -419,7 +419,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                     : JpegColorSpace.Cmyk;
             }
 
-            throw new ImageFormatException($"Unsupported color mode. Max components 4; found {this.ComponentCount}");
+            JpegThrowHelper.ThrowImageFormatException($"Unsupported color mode. Max components 4; found {this.ComponentCount}");
+            return default;
         }
 
         /// <summary>
@@ -646,6 +647,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 bool done = false;
                 remaining--;
                 int quantizationTableSpec = this.InputStream.ReadByte();
+                int tableIndex = quantizationTableSpec & 15;
+
+                // Max index. 4 Tables max.
+                if (tableIndex > 3)
+                {
+                    JpegThrowHelper.ThrowBadQuantizationTable();
+                }
 
                 switch (quantizationTableSpec >> 4)
                 {
@@ -661,7 +669,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                             this.InputStream.Read(this.temp, 0, 64);
                             remaining -= 64;
 
-                            ref Block8x8F table = ref this.QuantizationTables[quantizationTableSpec & 15];
+                            ref Block8x8F table = ref this.QuantizationTables[tableIndex];
                             for (int j = 0; j < 64; j++)
                             {
                                 table[j] = this.temp[j];
@@ -681,7 +689,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                             this.InputStream.Read(this.temp, 0, 128);
                             remaining -= 128;
 
-                            ref Block8x8F table = ref this.QuantizationTables[quantizationTableSpec & 15];
+                            ref Block8x8F table = ref this.QuantizationTables[tableIndex];
                             for (int j = 0; j < 64; j++)
                             {
                                 table[j] = (this.temp[2 * j] << 8) | this.temp[(2 * j) + 1];
@@ -690,7 +698,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
                         break;
                     default:
-                        throw new ImageFormatException("Bad Tq index value");
+                        JpegThrowHelper.ThrowBadQuantizationTable();
+                        break;
                 }
 
                 if (done)
@@ -701,7 +710,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
             if (remaining != 0)
             {
-                throw new ImageFormatException("DQT has wrong length");
+                JpegThrowHelper.ThrowBadMarker(nameof(JpegConstants.Markers.DQT), remaining);
             }
 
             this.MetaData.GetFormatMetaData(JpegFormat.Instance).Quality = QualityEvaluator.EstimateQuality(this.QuantizationTables);
@@ -717,15 +726,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             if (this.Frame != null)
             {
-                throw new ImageFormatException("Multiple SOF markers. Only single frame jpegs supported.");
+                JpegThrowHelper.ThrowImageFormatException("Multiple SOF markers. Only single frame jpegs supported.");
             }
 
-            this.InputStream.Read(this.temp, 0, remaining);
+            // Read initial marker definitions.
+            const int length = 6;
+            this.InputStream.Read(this.temp, 0, length);
 
             // We only support 8-bit and 12-bit precision.
             if (!this.supportedPrecisions.Contains(this.temp[0]))
             {
-                throw new ImageFormatException("Only 8-Bit and 12-Bit precision supported.");
+                JpegThrowHelper.ThrowImageFormatException("Only 8-Bit and 12-Bit precision supported.");
             }
 
             this.Precision = this.temp[0];
@@ -740,22 +751,35 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 ComponentCount = this.temp[5]
             };
 
-            this.ImageSizeInPixels = new Size(this.Frame.SamplesPerLine, this.Frame.Scanlines);
-
-            int maxH = 0;
-            int maxV = 0;
-            int index = 6;
+            if (this.Frame.SamplesPerLine == 0 || this.Frame.Scanlines == 0)
+            {
+                JpegThrowHelper.ThrowInvalidImageDimensions(this.Frame.SamplesPerLine, this.Frame.Scanlines);
+            }
 
+            this.ImageSizeInPixels = new Size(this.Frame.SamplesPerLine, this.Frame.Scanlines);
             this.ComponentCount = this.Frame.ComponentCount;
 
             if (!metadataOnly)
             {
+                remaining -= length;
+
+                const int componentBytes = 3;
+                if (remaining > this.ComponentCount * componentBytes)
+                {
+                    JpegThrowHelper.ThrowBadMarker("SOFn", remaining);
+                }
+
+                this.InputStream.Read(this.temp, 0, remaining);
+
                 // No need to pool this. They max out at 4
                 this.Frame.ComponentIds = new byte[this.ComponentCount];
                 this.Frame.ComponentOrder = new byte[this.ComponentCount];
                 this.Frame.Components = new JpegComponent[this.ComponentCount];
                 this.ColorSpace = this.DeduceJpegColorSpace();
 
+                int maxH = 0;
+                int maxV = 0;
+                int index = 0;
                 for (int i = 0; i < this.ComponentCount; i++)
                 {
                     byte hv = this.temp[index + 1];
@@ -777,7 +801,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                     this.Frame.Components[i] = component;
                     this.Frame.ComponentIds[i] = component.Id;
 
-                    index += 3;
+                    index += componentBytes;
                 }
 
                 this.Frame.MaxHorizontalFactor = maxH;
@@ -795,12 +819,29 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <param name="remaining">The remaining bytes in the segment block.</param>
         private void ProcessDefineHuffmanTablesMarker(int remaining)
         {
+            int length = remaining;
+
             using (IManagedByteBuffer huffmanData = this.configuration.MemoryAllocator.AllocateManagedByteBuffer(256, AllocationOptions.Clean))
             {
                 ref byte huffmanDataRef = ref MemoryMarshal.GetReference(huffmanData.GetSpan());
                 for (int i = 2; i < remaining;)
                 {
                     byte huffmanTableSpec = (byte)this.InputStream.ReadByte();
+                    int tableType = huffmanTableSpec >> 4;
+                    int tableIndex = huffmanTableSpec & 15;
+
+                    // Types 0..1 DC..AC
+                    if (tableType > 1)
+                    {
+                        JpegThrowHelper.ThrowImageFormatException("Bad Huffman Table type.");
+                    }
+
+                    // Max tables of each type
+                    if (tableIndex > 3)
+                    {
+                        JpegThrowHelper.ThrowImageFormatException("Bad Huffman Table index.");
+                    }
+
                     this.InputStream.Read(huffmanData.Array, 0, 16);
 
                     using (IManagedByteBuffer codeLengths = this.configuration.MemoryAllocator.AllocateManagedByteBuffer(17, AllocationOptions.Clean))
@@ -813,15 +854,19 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                             codeLengthSum += Unsafe.Add(ref codeLengthsRef, j) = Unsafe.Add(ref huffmanDataRef, j - 1);
                         }
 
+                        length -= 17;
+
+                        if (codeLengthSum > 256 || codeLengthSum > length)
+                        {
+                            JpegThrowHelper.ThrowImageFormatException("Huffman table has excessive length.");
+                        }
+
                         using (IManagedByteBuffer huffmanValues = this.configuration.MemoryAllocator.AllocateManagedByteBuffer(256, AllocationOptions.Clean))
                         {
                             this.InputStream.Read(huffmanValues.Array, 0, codeLengthSum);
 
                             i += 17 + codeLengthSum;
 
-                            int tableType = huffmanTableSpec >> 4;
-                            int tableIndex = huffmanTableSpec & 15;
-
                             this.BuildHuffmanTable(
                                 tableType == 0 ? this.dcHuffmanTables : this.acHuffmanTables,
                                 tableIndex,
@@ -848,7 +893,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             if (remaining != 2)
             {
-                throw new ImageFormatException($"DRI has wrong length: {remaining}");
+                JpegThrowHelper.ThrowBadMarker(nameof(JpegConstants.Markers.DRI), remaining);
             }
 
             this.resetInterval = this.ReadUint16();
@@ -861,7 +906,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             if (this.Frame is null)
             {
-                throw new ImageFormatException("No readable SOFn (Start Of Frame) marker found.");
+                JpegThrowHelper.ThrowImageFormatException("No readable SOFn (Start Of Frame) marker found.");
             }
 
             int selectorsCount = this.InputStream.ReadByte();
@@ -882,7 +927,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
                 if (componentIndex < 0)
                 {
-                    throw new ImageFormatException("Unknown component selector");
+                    JpegThrowHelper.ThrowImageFormatException($"Unknown component selector {componentIndex}.");
                 }
 
                 ref JpegComponent component = ref this.Frame.Components[componentIndex];
@@ -944,6 +989,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         private Image<TPixel> PostProcessIntoImage<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
+            if (this.ImageWidth == 0 || this.ImageHeight == 0)
+            {
+                JpegThrowHelper.ThrowInvalidImageDimensions(this.ImageWidth, this.ImageHeight);
+            }
+
             var image = Image.CreateUninitialized<TPixel>(
                 this.configuration,
                 this.ImageWidth,
diff --git a/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs b/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
index c7f3666604..b30da28c45 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
@@ -8,19 +8,28 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
     internal static class JpegThrowHelper
     {
         /// <summary>
-        /// Cold path optimization for throwing <see cref="ImageFormatException"/>-s
+        /// Cold path optimization for throwing <see cref="ImageFormatException"/>'s.
         /// </summary>
-        /// <param name="errorMessage">The error message for the exception</param>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        public static void ThrowImageFormatException(string errorMessage)
-        {
-            throw new ImageFormatException(errorMessage);
-        }
-
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        public static void ThrowBadHuffmanCode()
-        {
-            throw new ImageFormatException("Bad Huffman code.");
-        }
+        /// <param name="errorMessage">The error message for the exception.</param>
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowImageFormatException(string errorMessage) => throw new ImageFormatException(errorMessage);
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowBadMarker(string marker, int length) => throw new ImageFormatException($"Marker {marker} has bad length {length}.");
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowBadQuantizationTable() => throw new ImageFormatException("Bad Quantization Table index.");
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowBadHuffmanCode() => throw new ImageFormatException("Bad Huffman code.");
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowBadSampling() => throw new ImageFormatException("Bad sampling factor.");
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowBadProgressiveScan(int ss, int se, int ah, int al) => throw new ImageFormatException($"Invalid progressive parameters Ss={ss} Se={se} Ah={ah} Al={al}.");
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowInvalidImageDimensions(int width, int height) => throw new ImageFormatException($"Invalid image dimensions: {width}x{height}.");
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
index 1c9d207cd1..31a5a0eeb0 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -35,22 +34,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         }
 
         [Theory]
-        [WithFile(TestImages.Jpeg.Issues.CriticalEOF214, PixelTypes.Rgba32)]
-        public void DecodeBaselineJpeg_CriticalEOF_ShouldThrow<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            // TODO: We need a public ImageDecoderException class in ImageSharp!
-            Assert.ThrowsAny<Exception>(() => provider.GetImage(JpegDecoder));
-        }
-
-        [Theory]
-        [WithFile(TestImages.Jpeg.Issues.InvalidJpegThrowsWrongException797, PixelTypes.Rgba32)]
-        public void LoadingImage_InvalidTagLength_ShouldThrow<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(UnrecoverableTestJpegs), PixelTypes.Rgba32)]
+        public void UnrecoverableImagesShouldThrowCorrectError<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel> => Assert.Throws<ImageFormatException>(() => provider.GetImage());
-
-        [Theory]
-        [WithFile(TestImages.Jpeg.Issues.AccessViolationException798, PixelTypes.Rgba32)]
-        public void LoadingImage_BadHuffman_ShouldNotThrow<TPixel>(TestImageProvider<TPixel> provider)
-    where TPixel : struct, IPixel<TPixel> => Assert.NotNull(provider.GetImage());
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 9f34d7d09b..ff49de2481 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -31,6 +31,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Issues.ExifGetString750Load,
                 TestImages.Jpeg.Issues.ExifGetString750Transform,
 
+                // LibJpeg can open this despite the invalid desity units.
+                TestImages.Jpeg.Issues.Fuzz.ArgumentOutOfRangeException825B,
+
                 // High depth images
                 TestImages.Jpeg.Baseline.Testorig12bit,
             };
@@ -54,6 +57,31 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Issues.OrderedInterleavedProgressive723C
             };
 
+        public static string[] UnrecoverableTestJpegs = {
+
+            TestImages.Jpeg.Issues.CriticalEOF214,
+            TestImages.Jpeg.Issues.Fuzz.NullReferenceException797,
+            TestImages.Jpeg.Issues.Fuzz.AccessViolationException798,
+            TestImages.Jpeg.Issues.Fuzz.DivideByZeroException821,
+            TestImages.Jpeg.Issues.Fuzz.DivideByZeroException822,
+            TestImages.Jpeg.Issues.Fuzz.NullReferenceException823,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824A,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824B,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824C,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824D,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824E,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824F,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824G,
+            TestImages.Jpeg.Issues.Fuzz.IndexOutOfRangeException824H,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentOutOfRangeException825A,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentOutOfRangeException825C,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentOutOfRangeException825D,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentException826A,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentException826B,
+            TestImages.Jpeg.Issues.Fuzz.ArgumentException826C,
+            TestImages.Jpeg.Issues.Fuzz.AccessViolationException827
+        };
+
         private static readonly Dictionary<string, float> CustomToleranceValues =
             new Dictionary<string, float>
             {
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index e28caf6277..c99fe8d652 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -172,8 +172,31 @@ namespace SixLabors.ImageSharp.Tests
                 public const string OrderedInterleavedProgressive723C = "Jpg/issues/Issue723-Ordered-Interleaved-Progressive-C.jpg";
                 public const string ExifGetString750Transform = "Jpg/issues/issue750-exif-tranform.jpg";
                 public const string ExifGetString750Load = "Jpg/issues/issue750-exif-load.jpg";
-                public const string InvalidJpegThrowsWrongException797 = "Jpg/issues/Issue797-InvalidImage.jpg";
-                public const string AccessViolationException798 = "Jpg/issues/Issue798-AccessViolationException.jpg";
+
+                public static class Fuzz
+                {
+                    public const string NullReferenceException797 = "Jpg/issues/fuzz/Issue797-NullReferenceException.jpg";
+                    public const string AccessViolationException798 = "Jpg/issues/fuzz/Issue798-AccessViolationException.jpg";
+                    public const string DivideByZeroException821 = "Jpg/issues/fuzz/Issue821-DivideByZeroException.jpg";
+                    public const string DivideByZeroException822 = "Jpg/issues/fuzz/Issue822-DivideByZeroException.jpg";
+                    public const string NullReferenceException823 = "Jpg/issues/fuzz/Issue823-NullReferenceException.jpg";
+                    public const string IndexOutOfRangeException824A = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-A.jpg";
+                    public const string IndexOutOfRangeException824B = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-B.jpg";
+                    public const string IndexOutOfRangeException824C = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-C.jpg";
+                    public const string IndexOutOfRangeException824D = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-D.jpg";
+                    public const string IndexOutOfRangeException824E = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-E.jpg";
+                    public const string IndexOutOfRangeException824F = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-F.jpg";
+                    public const string IndexOutOfRangeException824G = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-G.jpg";
+                    public const string IndexOutOfRangeException824H = "Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-H.jpg";
+                    public const string ArgumentOutOfRangeException825A = "Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-A.jpg";
+                    public const string ArgumentOutOfRangeException825B = "Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-B.jpg";
+                    public const string ArgumentOutOfRangeException825C = "Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-C.jpg";
+                    public const string ArgumentOutOfRangeException825D = "Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-D.jpg";
+                    public const string ArgumentException826A = "Jpg/issues/fuzz/Issue826-ArgumentException-A.jpg";
+                    public const string ArgumentException826B = "Jpg/issues/fuzz/Issue826-ArgumentException-B.jpg";
+                    public const string ArgumentException826C = "Jpg/issues/fuzz/Issue826-ArgumentException-C.jpg";
+                    public const string AccessViolationException827 = "Jpg/issues/fuzz/Issue827-AccessViolationException.jpg";
+                }
             }
 
             public static readonly string[] All = Baseline.All.Concat(Progressive.All).ToArray();
@@ -236,7 +259,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Rgba321010102 = "Bmp/rgba32-1010102.bmp";
             public const string RgbaAlphaBitfields = "Bmp/rgba32abf.bmp";
 
-            public static readonly string[] BitFields 
+            public static readonly string[] BitFields
             = {
                   Rgb32bfdef,
                   Rgb32bf,
diff --git a/tests/Images/External b/tests/Images/External
index 32dc8aec11..c4098e463a 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 32dc8aec1109b681f056264e6bde1f3a76f08aba
+Subproject commit c4098e463ab0e7128ae196b7f963369271df8fd3
diff --git a/tests/Images/Input/Jpg/issues/Issue214-CriticalEOF .jpg b/tests/Images/Input/Jpg/issues/Issue214-CriticalEOF.jpg
similarity index 100%
rename from tests/Images/Input/Jpg/issues/Issue214-CriticalEOF .jpg
rename to tests/Images/Input/Jpg/issues/Issue214-CriticalEOF.jpg
diff --git a/tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue797-NullReferenceException.jpg
similarity index 100%
rename from tests/Images/Input/Jpg/issues/Issue797-InvalidImage.jpg
rename to tests/Images/Input/Jpg/issues/fuzz/Issue797-NullReferenceException.jpg
diff --git a/tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue798-AccessViolationException.jpg
similarity index 100%
rename from tests/Images/Input/Jpg/issues/Issue798-AccessViolationException.jpg
rename to tests/Images/Input/Jpg/issues/fuzz/Issue798-AccessViolationException.jpg
diff --git a/tests/Images/Input/Jpg/issues/fuzz/Issue821-DivideByZeroException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue821-DivideByZeroException.jpg
new file mode 100644
index 0000000000..23e95f1238
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue821-DivideByZeroException.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:44f42f4b5c0491b7e8f5fe4b6a580c99bc5246cfe95238c601c75a7c5926e4b1
+size 397
diff --git a/tests/Images/Input/Jpg/issues/fuzz/Issue822-DivideByZeroException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue822-DivideByZeroException.jpg
new file mode 100644
index 0000000000..8a6fd02913
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue822-DivideByZeroException.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:15107f755765118c8a1afac4a58f2945b3bd503ddabcc5b831219d1a159209d9
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new file mode 100644
index 0000000000..a404664aeb
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue823-NullReferenceException.jpg
@@ -0,0 +1,3 @@
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new file mode 100644
index 0000000000..7df0579b03
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue824-IndexOutOfRangeException-A.jpg
@@ -0,0 +1,3 @@
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new file mode 100644
index 0000000000..396cddb599
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@@ -0,0 +1,3 @@
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--- /dev/null
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@@ -0,0 +1,3 @@
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new file mode 100644
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@@ -0,0 +1,3 @@
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index 0000000000..845a526350
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-A.jpg
@@ -0,0 +1,3 @@
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index 0000000000..57dd33e234
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@@ -0,0 +1,3 @@
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index 0000000000..2e595e36ae
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-C.jpg
@@ -0,0 +1,3 @@
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--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue825-ArgumentOutOfRangeException-D.jpg
@@ -0,0 +1,3 @@
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new file mode 100644
index 0000000000..5766e13d53
--- /dev/null
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@@ -0,0 +1,3 @@
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index 0000000000..fa11080385
--- /dev/null
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diff --git a/tests/Images/Input/Jpg/issues/fuzz/Issue827-AccessViolationException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue827-AccessViolationException.jpg
new file mode 100644
index 0000000000..177bb082a9
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue827-AccessViolationException.jpg
@@ -0,0 +1,3 @@
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From a69eb5bbedf01225aa4e105c28342f484ba13d40 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sat, 23 Feb 2019 21:36:37 +1100
Subject: [PATCH 025/223] Lazily derive the huffman tables. Fix #839 (#841)

* Lazily derive the huffman tables. Fix #839

* Lazy invoke fast table

* Add performance tweaks to scan decoder.

* Remove unneccessary classes.
---
 .../Jpeg/Components/Decoder/FastACTable.cs    |  61 +++++++
 .../Jpeg/Components/Decoder/FastACTables.cs   |  90 ----------
 .../Jpeg/Components/Decoder/HuffmanTable.cs   |  31 +++-
 .../Jpeg/Components/Decoder/HuffmanTables.cs  |  26 ---
 .../Jpeg/Components/Decoder/ScanDecoder.cs    | 164 ++++++++++++------
 .../Formats/Jpeg/JpegDecoderCore.cs           |  22 +--
 .../Formats/Jpg/JpegDecoderTests.Images.cs    |   3 +-
 tests/ImageSharp.Tests/TestImages.cs          |   1 +
 .../Issue839-ExecutionEngineException.jpg     |   3 +
 9 files changed, 212 insertions(+), 189 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
 delete mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTables.cs
 delete mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTables.cs
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
new file mode 100644
index 0000000000..57d2221ba3
--- /dev/null
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
@@ -0,0 +1,61 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Runtime.CompilerServices;
+
+namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
+{
+    internal unsafe struct FastACTable
+    {
+        /// <summary>
+        /// Gets the lookahead array
+        /// </summary>
+        public fixed short Lookahead[512];
+
+        /// <summary>
+        /// Derives a lookup table for fast AC entropy scan decoding.
+        /// This can happen multiple times during progressive decoding but always outside mcu loops.
+        /// </summary>
+        /// <param name="huffmanTable">The AC Huffman table.</param>
+        public void Derive(ref HuffmanTable huffmanTable)
+        {
+            const int FastBits = ScanDecoder.FastBits;
+            ref short fastACRef = ref this.Lookahead[0];
+            ref byte huffmanLookaheadRef = ref huffmanTable.Lookahead[0];
+            ref byte huffmanValuesRef = ref huffmanTable.Values[0];
+            ref short huffmanSizesRef = ref huffmanTable.Sizes[0];
+
+            int i;
+            for (i = 0; i < (1 << FastBits); i++)
+            {
+                byte fast = Unsafe.Add(ref huffmanLookaheadRef, i);
+                Unsafe.Add(ref fastACRef, i) = 0;
+
+                if (fast < byte.MaxValue)
+                {
+                    int rs = Unsafe.Add(ref huffmanValuesRef, fast);
+                    int run = (rs >> 4) & 15;
+                    int magbits = rs & 15;
+                    int len = Unsafe.Add(ref huffmanSizesRef, fast);
+
+                    if (magbits != 0 && len + magbits <= FastBits)
+                    {
+                        // Magnitude code followed by receive_extend code
+                        int k = ((i << len) & ((1 << FastBits) - 1)) >> (FastBits - magbits);
+                        int m = 1 << (magbits - 1);
+                        if (k < m)
+                        {
+                            k += (int)((~0U << magbits) + 1);
+                        }
+
+                        // If the result is small enough, we can fit it in fastAC table
+                        if (k >= -128 && k <= 127)
+                        {
+                            Unsafe.Add(ref fastACRef, i) = (short)((k << 8) + (run << 4) + (len + magbits));
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTables.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTables.cs
deleted file mode 100644
index 06b46746a6..0000000000
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTables.cs
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Runtime.CompilerServices;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.Memory;
-
-namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
-{
-    /// <summary>
-    /// The collection of lookup tables used for fast AC entropy scan decoding.
-    /// </summary>
-    internal sealed class FastACTables : IDisposable
-    {
-        private Buffer2D<short> tables;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="FastACTables"/> class.
-        /// </summary>
-        /// <param name="memoryAllocator">The memory allocator used to allocate memory for image processing operations.</param>
-        public FastACTables(MemoryAllocator memoryAllocator) => this.tables = memoryAllocator.Allocate2D<short>(512, 4, AllocationOptions.Clean);
-
-        /// <summary>
-        /// Gets the <see cref="Span{Int16}"/> representing the table at the index in the collection.
-        /// </summary>
-        /// <param name="index">The table index.</param>
-        /// <returns><see cref="Span{Int16}"/></returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        public ReadOnlySpan<short> GetTableSpan(int index) => this.tables.GetRowSpan(index);
-
-        /// <summary>
-        /// Gets a reference to the first element of the AC table indexed by <see cref="JpegComponent.ACHuffmanTableId"/>
-        /// </summary>
-        /// <param name="component">The frame component.</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        public ref short GetAcTableReference(JpegComponent component) => ref this.tables.GetRowSpan(component.ACHuffmanTableId)[0];
-
-        /// <summary>
-        /// Builds a lookup table for fast AC entropy scan decoding.
-        /// </summary>
-        /// <param name="index">The table index.</param>
-        /// <param name="acHuffmanTables">The collection of AC Huffman tables.</param>
-        public unsafe void BuildACTableLut(int index, HuffmanTables acHuffmanTables)
-        {
-            const int FastBits = ScanDecoder.FastBits;
-            Span<short> fastAC = this.tables.GetRowSpan(index);
-            ref HuffmanTable huffmanTable = ref acHuffmanTables[index];
-
-            int i;
-            for (i = 0; i < (1 << FastBits); i++)
-            {
-                byte fast = huffmanTable.Lookahead[i];
-                fastAC[i] = 0;
-                if (fast < byte.MaxValue)
-                {
-                    int rs = huffmanTable.Values[fast];
-                    int run = (rs >> 4) & 15;
-                    int magbits = rs & 15;
-                    int len = huffmanTable.Sizes[fast];
-
-                    if (magbits != 0 && len + magbits <= FastBits)
-                    {
-                        // Magnitude code followed by receive_extend code
-                        int k = ((i << len) & ((1 << FastBits) - 1)) >> (FastBits - magbits);
-                        int m = 1 << (magbits - 1);
-                        if (k < m)
-                        {
-                            k += (int)((~0U << magbits) + 1);
-                        }
-
-                        // if the result is small enough, we can fit it in fastAC table
-                        if (k >= -128 && k <= 127)
-                        {
-                            fastAC[i] = (short)((k << 8) + (run << 4) + (len + magbits));
-                        }
-                    }
-                }
-            }
-        }
-
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            this.tables?.Dispose();
-            this.tables = null;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index 90b3624651..a2c9bade19 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -17,6 +17,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     [StructLayout(LayoutKind.Sequential)]
     internal unsafe struct HuffmanTable
     {
+        private bool isDerived;
+
+        private readonly MemoryAllocator memoryAllocator;
+
+#pragma warning disable IDE0044 // Add readonly modifier
+        private fixed byte codeLengths[17];
+#pragma warning restore IDE0044 // Add readonly modifier
+
         /// <summary>
         /// Gets the max code array
         /// </summary>
@@ -50,16 +58,31 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="values">The huffman values</param>
         public HuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
         {
+            this.isDerived = false;
+            this.memoryAllocator = memoryAllocator;
+            Unsafe.CopyBlockUnaligned(ref this.codeLengths[0], ref MemoryMarshal.GetReference(codeLengths), (uint)codeLengths.Length);
+            Unsafe.CopyBlockUnaligned(ref this.Values[0], ref MemoryMarshal.GetReference(values), (uint)values.Length);
+        }
+
+        /// <summary>
+        /// Expands the HuffmanTable into its derived form.
+        /// </summary>
+        public void Derive()
+        {
+            if (this.isDerived)
+            {
+                return;
+            }
+
             const int Length = 257;
-            using (IMemoryOwner<short> huffcode = memoryAllocator.Allocate<short>(Length))
+            using (IMemoryOwner<short> huffcode = this.memoryAllocator.Allocate<short>(Length))
             {
                 ref short huffcodeRef = ref MemoryMarshal.GetReference(huffcode.GetSpan());
-                ref byte codeLengthsRef = ref MemoryMarshal.GetReference(codeLengths);
+                ref byte codeLengthsRef = ref this.codeLengths[0];
 
                 // Figure C.1: make table of Huffman code length for each symbol
                 ref short sizesRef = ref this.Sizes[0];
                 short x = 0;
-
                 for (short i = 1; i < 17; i++)
                 {
                     byte length = Unsafe.Add(ref codeLengthsRef, i);
@@ -119,7 +142,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 }
             }
 
-            Unsafe.CopyBlockUnaligned(ref this.Values[0], ref MemoryMarshal.GetReference(values), 256);
+            this.isDerived = true;
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTables.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTables.cs
deleted file mode 100644
index dc066aa0ac..0000000000
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTables.cs
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Runtime.CompilerServices;
-
-namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
-{
-    /// <summary>
-    /// Defines a 2 pairs of huffman tables.
-    /// </summary>
-    internal sealed class HuffmanTables
-    {
-        private readonly HuffmanTable[] tables = new HuffmanTable[4];
-
-        /// <summary>
-        /// Gets or sets the table at the given index.
-        /// </summary>
-        /// <param name="index">The index</param>
-        /// <returns>The <see cref="HuffmanTable"/></returns>
-        public ref HuffmanTable this[int index]
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => ref this.tables[index];
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
index 070652a9f9..ef4b359ff2 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Memory;
 
@@ -25,9 +26,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         private static readonly int[] Bias = { 0, -1, -3, -7, -15, -31, -63, -127, -255, -511, -1023, -2047, -4095, -8191, -16383, -32767 };
 
         private readonly JpegFrame frame;
-        private readonly HuffmanTables dcHuffmanTables;
-        private readonly HuffmanTables acHuffmanTables;
-        private readonly FastACTables fastACTables;
+        private readonly HuffmanTable[] dcHuffmanTables;
+        private readonly HuffmanTable[] acHuffmanTables;
+        private readonly FastACTable[] fastACTables;
 
         private readonly DoubleBufferedStreamReader stream;
         private readonly JpegComponent[] components;
@@ -95,9 +96,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public ScanDecoder(
             DoubleBufferedStreamReader stream,
             JpegFrame frame,
-            HuffmanTables dcHuffmanTables,
-            HuffmanTables acHuffmanTables,
-            FastACTables fastACTables,
+            HuffmanTable[] dcHuffmanTables,
+            HuffmanTable[] acHuffmanTables,
+            FastACTable[] fastACTables,
             int componentsLength,
             int restartInterval,
             int spectralStart,
@@ -159,17 +160,35 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             }
         }
 
-        private void ParseBaselineDataInterleaved()
+        private unsafe void ParseBaselineDataInterleaved()
         {
             // Interleaved
             int mcu = 0;
             int mcusPerColumn = this.frame.McusPerColumn;
             int mcusPerLine = this.frame.McusPerLine;
+
+            // Pre-derive the huffman table to avoid in-loop checks.
+            for (int i = 0; i < this.componentsLength; i++)
+            {
+                int order = this.frame.ComponentOrder[i];
+                JpegComponent component = this.components[order];
+
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+                dcHuffmanTable.Derive();
+                acHuffmanTable.Derive();
+
+                ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
+                fastAcTable.Derive(ref acHuffmanTable);
+            }
+
             for (int j = 0; j < mcusPerColumn; j++)
             {
                 for (int i = 0; i < mcusPerLine; i++)
                 {
                     // Scan an interleaved mcu... process components in order
+                    int mcuRow = mcu / mcusPerLine;
+                    int mcuCol = mcu % mcusPerLine;
                     for (int k = 0; k < this.componentsLength; k++)
                     {
                         int order = this.frame.ComponentOrder[k];
@@ -177,18 +196,20 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                         ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
                         ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-                        ref short fastACRef = ref this.fastACTables.GetAcTableReference(component);
+                        ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
+                        ref short fastACRef = ref fastAcTable.Lookahead[0];
+
                         int h = component.HorizontalSamplingFactor;
                         int v = component.VerticalSamplingFactor;
 
-                        int mcuRow = mcu / mcusPerLine;
-
                         // Scan out an mcu's worth of this component; that's just determined
                         // by the basic H and V specified for the component
                         for (int y = 0; y < v; y++)
                         {
                             int blockRow = (mcuRow * v) + y;
                             Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
                             for (int x = 0; x < h; x++)
                             {
                                 if (this.eof)
@@ -196,12 +217,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                                     return;
                                 }
 
-                                int mcuCol = mcu % mcusPerLine;
                                 int blockCol = (mcuCol * h) + x;
 
                                 this.DecodeBlockBaseline(
                                     component,
-                                    ref blockSpan[blockCol],
+                                    ref Unsafe.Add(ref blockRef, blockCol),
                                     ref dcHuffmanTable,
                                     ref acHuffmanTable,
                                     ref fastACRef);
@@ -225,7 +245,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// number of blocks to do just depends on how many actual "pixels" each component has,
         /// independent of interleaved MCU blocking and such.
         /// </summary>
-        private void ParseBaselineDataNonInterleaved()
+        private unsafe void ParseBaselineDataNonInterleaved()
         {
             JpegComponent component = this.components[this.frame.ComponentOrder[0]];
 
@@ -234,14 +254,19 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
             ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
             ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-            ref short fastACRef = ref this.fastACTables.GetAcTableReference(component);
+            dcHuffmanTable.Derive();
+            acHuffmanTable.Derive();
+
+            ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
+            fastAcTable.Derive(ref acHuffmanTable);
+            ref short fastACRef = ref fastAcTable.Lookahead[0];
 
             int mcu = 0;
             for (int j = 0; j < h; j++)
             {
-                // TODO: Isn't blockRow == j actually?
-                int blockRow = mcu / w;
-                Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                int blockRow = j;
+                Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
 
                 for (int i = 0; i < w; i++)
                 {
@@ -250,12 +275,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                         return;
                     }
 
-                    // TODO: Isn't blockCol == i actually?
-                    int blockCol = mcu % w;
-
                     this.DecodeBlockBaseline(
                         component,
-                        ref blockSpan[blockCol],
+                        ref Unsafe.Add(ref blockRef, i),
                         ref dcHuffmanTable,
                         ref acHuffmanTable,
                         ref fastACRef);
@@ -340,16 +362,29 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int mcu = 0;
             int mcusPerColumn = this.frame.McusPerColumn;
             int mcusPerLine = this.frame.McusPerLine;
+
+            // Pre-derive the huffman table to avoid in-loop checks.
+            for (int k = 0; k < this.componentsLength; k++)
+            {
+                int order = this.frame.ComponentOrder[k];
+                JpegComponent component = this.components[order];
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                dcHuffmanTable.Derive();
+            }
+
             for (int j = 0; j < mcusPerColumn; j++)
             {
                 for (int i = 0; i < mcusPerLine; i++)
                 {
                     // Scan an interleaved mcu... process components in order
+                    int mcuRow = mcu / mcusPerLine;
+                    int mcuCol = mcu % mcusPerLine;
                     for (int k = 0; k < this.componentsLength; k++)
                     {
                         int order = this.frame.ComponentOrder[k];
                         JpegComponent component = this.components[order];
                         ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+
                         int h = component.HorizontalSamplingFactor;
                         int v = component.VerticalSamplingFactor;
 
@@ -357,9 +392,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                         // by the basic H and V specified for the component
                         for (int y = 0; y < v; y++)
                         {
-                            int mcuRow = mcu / mcusPerLine;
                             int blockRow = (mcuRow * v) + y;
                             Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
 
                             for (int x = 0; x < h; x++)
                             {
@@ -368,12 +403,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                                     return;
                                 }
 
-                                int mcuCol = mcu % mcusPerLine;
                                 int blockCol = (mcuCol * h) + x;
 
                                 this.DecodeBlockProgressiveDC(
                                     component,
-                                    ref blockSpan[blockCol],
+                                    ref Unsafe.Add(ref blockRef, blockCol),
                                     ref dcHuffmanTable);
                             }
                         }
@@ -396,56 +430,78 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// number of blocks to do just depends on how many actual "pixels" this
         /// component has, independent of interleaved MCU blocking and such
         /// </summary>
-        private void ParseProgressiveDataNonInterleaved()
+        private unsafe void ParseProgressiveDataNonInterleaved()
         {
             JpegComponent component = this.components[this.frame.ComponentOrder[0]];
 
             int w = component.WidthInBlocks;
             int h = component.HeightInBlocks;
 
-            ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-            ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-            ref short fastACRef = ref this.fastACTables.GetAcTableReference(component);
-
-            int mcu = 0;
-            for (int j = 0; j < h; j++)
+            if (this.spectralStart == 0)
             {
-                // TODO: isn't blockRow == j actually?
-                int blockRow = mcu / w;
-                Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                dcHuffmanTable.Derive();
 
-                for (int i = 0; i < w; i++)
+                int mcu = 0;
+                for (int j = 0; j < h; j++)
                 {
-                    if (this.eof)
-                    {
-                        return;
-                    }
-
-                    // TODO: isn't blockCol == i actually?
-                    int blockCol = mcu % w;
+                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
 
-                    ref Block8x8 block = ref blockSpan[blockCol];
-
-                    if (this.spectralStart == 0)
+                    for (int i = 0; i < w; i++)
                     {
+                        if (this.eof)
+                        {
+                            return;
+                        }
+
                         this.DecodeBlockProgressiveDC(
                             component,
-                            ref block,
+                            ref Unsafe.Add(ref blockRef, i),
                             ref dcHuffmanTable);
+
+                        // Every data block is an MCU, so countdown the restart interval
+                        mcu++;
+                        if (!this.ContinueOnMcuComplete())
+                        {
+                            return;
+                        }
                     }
-                    else
+                }
+            }
+            else
+            {
+                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+                acHuffmanTable.Derive();
+
+                ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
+                fastAcTable.Derive(ref acHuffmanTable);
+                ref short fastACRef = ref fastAcTable.Lookahead[0];
+
+                int mcu = 0;
+                for (int j = 0; j < h; j++)
+                {
+                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                    for (int i = 0; i < w; i++)
                     {
+                        if (this.eof)
+                        {
+                            return;
+                        }
+
                         this.DecodeBlockProgressiveAC(
-                            ref block,
+                            ref Unsafe.Add(ref blockRef, i),
                             ref acHuffmanTable,
                             ref fastACRef);
-                    }
 
-                    // Every data block is an MCU, so countdown the restart interval
-                    mcu++;
-                    if (!this.ContinueOnMcuComplete())
-                    {
-                        return;
+                        // Every data block is an MCU, so countdown the restart interval
+                        mcu++;
+                        if (!this.ContinueOnMcuComplete())
+                        {
+                            return;
+                        }
                     }
                 }
             }
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 9bcfd9ff64..891dd52826 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -52,17 +52,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// The DC Huffman tables
         /// </summary>
-        private HuffmanTables dcHuffmanTables;
+        private HuffmanTable[] dcHuffmanTables;
 
         /// <summary>
         /// The AC Huffman tables
         /// </summary>
-        private HuffmanTables acHuffmanTables;
+        private HuffmanTable[] acHuffmanTables;
 
         /// <summary>
         /// The fast AC tables used for entropy decoding
         /// </summary>
-        private FastACTables fastACTables;
+        private FastACTable[] fastACTables;
 
         /// <summary>
         /// The reset interval determined by RST markers
@@ -266,9 +266,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             // Only assign what we need
             if (!metadataOnly)
             {
-                this.dcHuffmanTables = new HuffmanTables();
-                this.acHuffmanTables = new HuffmanTables();
-                this.fastACTables = new FastACTables(this.configuration.MemoryAllocator);
+                const int maxTables = 4;
+                this.dcHuffmanTables = new HuffmanTable[maxTables];
+                this.acHuffmanTables = new HuffmanTable[maxTables];
+                this.fastACTables = new FastACTable[maxTables];
             }
 
             // Break only when we discover a valid EOI marker.
@@ -378,7 +379,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             this.InputStream?.Dispose();
             this.Frame?.Dispose();
-            this.fastACTables?.Dispose();
 
             // Set large fields to null.
             this.InputStream = null;
@@ -872,12 +872,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                                 tableIndex,
                                 codeLengths.GetSpan(),
                                 huffmanValues.GetSpan());
-
-                            if (tableType != 0)
-                            {
-                                // Build a table that decodes both magnitude and value of small ACs in one go.
-                                this.fastACTables.BuildACTableLut(tableIndex, this.acHuffmanTables);
-                            }
                         }
                     }
                 }
@@ -967,7 +961,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <param name="codeLengths">The codelengths</param>
         /// <param name="values">The values</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        private void BuildHuffmanTable(HuffmanTables tables, int index, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
+        private void BuildHuffmanTable(HuffmanTable[] tables, int index, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
             => tables[index] = new HuffmanTable(this.configuration.MemoryAllocator, codeLengths, values);
 
         /// <summary>
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index ff49de2481..8a94826077 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -79,7 +79,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             TestImages.Jpeg.Issues.Fuzz.ArgumentException826A,
             TestImages.Jpeg.Issues.Fuzz.ArgumentException826B,
             TestImages.Jpeg.Issues.Fuzz.ArgumentException826C,
-            TestImages.Jpeg.Issues.Fuzz.AccessViolationException827
+            TestImages.Jpeg.Issues.Fuzz.AccessViolationException827,
+            TestImages.Jpeg.Issues.Fuzz.ExecutionEngineException839
         };
 
         private static readonly Dictionary<string, float> CustomToleranceValues =
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index c99fe8d652..cf1e49b271 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -196,6 +196,7 @@ namespace SixLabors.ImageSharp.Tests
                     public const string ArgumentException826B = "Jpg/issues/fuzz/Issue826-ArgumentException-B.jpg";
                     public const string ArgumentException826C = "Jpg/issues/fuzz/Issue826-ArgumentException-C.jpg";
                     public const string AccessViolationException827 = "Jpg/issues/fuzz/Issue827-AccessViolationException.jpg";
+                    public const string ExecutionEngineException839 = "Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg";
                 }
             }
 
diff --git a/tests/Images/Input/Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg
new file mode 100644
index 0000000000..b411b970a7
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b37ac1cc34680db9721542ef5354f7509860afd37888a24f6350f29f5b63eea1
+size 397

From 794fe208517883e983f4b8b3d355ad64846c64d1 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sat, 16 Mar 2019 10:16:17 +1100
Subject: [PATCH 026/223] Implement IEquatable<Block8x8F> and check when
 summing. (#848)

---
 .../Formats/Jpeg/Components/Block8x8F.cs      | 23 ++++++++++++++++++-
 .../Components/Decoder/QualityEvaluator.cs    |  8 +++++--
 .../Formats/Jpg/JpegDecoderTests.MetaData.cs  |  5 ++--
 tests/ImageSharp.Tests/TestImages.cs          |  1 +
 .../issues/Issue845-Incorrect-Quality99.jpg   |  3 +++
 5 files changed, 35 insertions(+), 5 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/issues/Issue845-Incorrect-Quality99.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
index c9c886f057..c0de450695 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
     /// <summary>
     /// Represents a Jpeg block with <see cref="float"/> coefficients.
     /// </summary>
-    internal partial struct Block8x8F
+    internal partial struct Block8x8F : IEquatable<Block8x8F>
     {
         /// <summary>
         /// A number of scalar coefficients in a <see cref="Block8x8F"/>
@@ -538,6 +538,27 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
             Unsafe.Add(ref dRef, 7) = bottom;
         }
 
+        /// <inheritdoc />
+        public bool Equals(Block8x8F other)
+        {
+            return this.V0L == other.V0L
+            && this.V0R == other.V0R
+            && this.V1L == other.V1L
+            && this.V1R == other.V1R
+            && this.V2L == other.V2L
+            && this.V2R == other.V2R
+            && this.V3L == other.V3L
+            && this.V3R == other.V3R
+            && this.V4L == other.V4L
+            && this.V4R == other.V4R
+            && this.V5L == other.V5L
+            && this.V5R == other.V5R
+            && this.V6L == other.V6L
+            && this.V6R == other.V6R
+            && this.V7L == other.V7L
+            && this.V7R == other.V7R;
+        }
+
         /// <inheritdoc />
         public override string ToString()
         {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/QualityEvaluator.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/QualityEvaluator.cs
index 4e11568c8d..a7d2a0fde9 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/QualityEvaluator.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/QualityEvaluator.cs
@@ -84,9 +84,13 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             for (int i = 0; i < quantizationTables.Length; i++)
             {
                 ref Block8x8F qTable = ref quantizationTables[i];
-                for (int j = 0; j < Block8x8F.Size; j++)
+
+                if (!qTable.Equals(default))
                 {
-                    sum += qTable[j];
+                    for (int j = 0; j < Block8x8F.Size; j++)
+                    {
+                        sum += qTable[j];
+                    }
                 }
             }
 
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
index 4810985f11..1f1583a39f 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
@@ -52,8 +52,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         public static readonly TheoryData<string, int> QualityFiles =
         new TheoryData<string, int>
         {
-            { TestImages.Jpeg.Baseline.Calliphora, 80},
-            { TestImages.Jpeg.Progressive.Fb, 75 }
+            { TestImages.Jpeg.Baseline.Calliphora, 80 },
+            { TestImages.Jpeg.Progressive.Fb, 75 },
+            { TestImages.Jpeg.Issues.IncorrectQuality845, 99 }
         };
 
         [Theory]
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index cf1e49b271..3f12fab125 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -172,6 +172,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string OrderedInterleavedProgressive723C = "Jpg/issues/Issue723-Ordered-Interleaved-Progressive-C.jpg";
                 public const string ExifGetString750Transform = "Jpg/issues/issue750-exif-tranform.jpg";
                 public const string ExifGetString750Load = "Jpg/issues/issue750-exif-load.jpg";
+                public const string IncorrectQuality845 = "Jpg/issues/Issue845-Incorrect-Quality99.jpg";
 
                 public static class Fuzz
                 {
diff --git a/tests/Images/Input/Jpg/issues/Issue845-Incorrect-Quality99.jpg b/tests/Images/Input/Jpg/issues/Issue845-Incorrect-Quality99.jpg
new file mode 100644
index 0000000000..639fce534e
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/Issue845-Incorrect-Quality99.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4917339488d46f25ef9ffba6bcfe42272fb190808da7c24e7a3d3f31e0b68a8c
+size 2270501

From 512647489f47ca0bbc39b3fb2f068a5974fccd9c Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 21 Mar 2019 10:30:38 -0700
Subject: [PATCH 027/223] Bounds check. Fix #849 (#851)

---
 src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs  | 9 ++++++++-
 tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs | 3 ++-
 tests/ImageSharp.Tests/TestImages.cs                  | 1 +
 tests/Images/Input/Png/zlib-overflow.png              | 3 +++
 4 files changed, 14 insertions(+), 2 deletions(-)
 create mode 100644 tests/Images/Input/Png/zlib-overflow.png

diff --git a/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs b/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
index 583175b566..71141a8939 100644
--- a/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
+++ b/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
@@ -126,8 +126,9 @@ namespace SixLabors.ImageSharp.Formats.Png.Zlib
             int bytesToRead = Math.Min(count, this.currentDataRemaining);
             this.currentDataRemaining -= bytesToRead;
             int bytesRead = this.innerStream.Read(buffer, offset, bytesToRead);
+            long length = this.innerStream.Length;
 
-            // keep reading data until we've reached the end of the stream or filled the buffer
+            // Keep reading data until we've reached the end of the stream or filled the buffer
             while (this.currentDataRemaining == 0 && bytesRead < count)
             {
                 this.currentDataRemaining = this.getData();
@@ -138,6 +139,12 @@ namespace SixLabors.ImageSharp.Formats.Png.Zlib
                 }
 
                 offset += bytesRead;
+
+                if (offset >= length)
+                {
+                    return bytesRead;
+                }
+
                 bytesToRead = Math.Min(count - bytesRead, this.currentDataRemaining);
                 this.currentDataRemaining -= bytesToRead;
                 bytesRead += this.innerStream.Read(buffer, offset, bytesToRead);
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index eca7a2543a..fe406c9924 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -41,7 +41,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             TestImages.Png.Rgb24BppTrans,
             TestImages.Png.GrayAlpha8Bit,
-            TestImages.Png.Gray1BitTrans
+            TestImages.Png.Gray1BitTrans,
+            TestImages.Png.Bad.ZlibOverflow
         };
 
         public static readonly string[] TestImages48Bpp =
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 3f12fab125..9099696247 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -85,6 +85,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string ChunkLength1 = "Png/chunklength1.png";
                 public const string ChunkLength2 = "Png/chunklength2.png";
                 public const string CorruptedChunk = "Png/big-corrupted-chunk.png";
+                public const string ZlibOverflow = "Png/zlib-overflow.png";
             }
 
             public static readonly string[] All =
diff --git a/tests/Images/Input/Png/zlib-overflow.png b/tests/Images/Input/Png/zlib-overflow.png
new file mode 100644
index 0000000000..07bf660b8a
--- /dev/null
+++ b/tests/Images/Input/Png/zlib-overflow.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2705125a7b108c7ef4e13872be88b991cd06ba97d81a306f70f58749cec53514
+size 10725

From 701d6124b3f6614e1b741f84db90a5e7771eff14 Mon Sep 17 00:00:00 2001
From: Kjetil Klaussen <kjetil.klaussen@gmail.com>
Date: Thu, 21 Mar 2019 18:43:38 +0100
Subject: [PATCH 028/223] #852 Adding instructions to add submodules when
 cloning the repository

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index a72074f8f3..079f2106f9 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,14 @@ To clone ImageSharp locally click the "Clone in Windows" button above or run the
 git clone https://github.com/SixLabors/ImageSharp
 ```
 
+### Submodules
+
+This repository contains [git submodule](https://blog.github.com/2016-02-01-working-with-submodules/). To add the submodules to the project, navigate to the repository root and type:
+
+``` bash
+git submodule update --init --recursive
+```
+
 ### How can you help?
 
 Please... Spread the word, contribute algorithms, submit performance improvements, unit tests, no input is too little. Make sure to read our [Contribution Guide](https://github.com/SixLabors/ImageSharp/blob/master/.github/CONTRIBUTING.md) before opening a PR.

From 5a550c4f25d597cf464203d8d2bf59af7a8f6fc1 Mon Sep 17 00:00:00 2001
From: Kjetil Klaussen <kjetil.klaussen@gmail.com>
Date: Thu, 21 Mar 2019 18:48:23 +0100
Subject: [PATCH 029/223] fix: Typo

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 079f2106f9..ceb28564b9 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ git clone https://github.com/SixLabors/ImageSharp
 
 ### Submodules
 
-This repository contains [git submodule](https://blog.github.com/2016-02-01-working-with-submodules/). To add the submodules to the project, navigate to the repository root and type:
+This repository contains [git submodules](https://blog.github.com/2016-02-01-working-with-submodules/). To add the submodules to the project, navigate to the repository root and type:
 
 ``` bash
 git submodule update --init --recursive

From bcc19cf20dd0c994a80b666a0de44bac51f66af0 Mon Sep 17 00:00:00 2001
From: Tanner Gooding <tagoo@outlook.com>
Date: Mon, 25 Mar 2019 18:30:29 -0700
Subject: [PATCH 030/223] Updating some readonly static data in JpegEncoderCore
 to take advantage of compiler functionality. (#855)

---
 .../Common/Extensions/StreamExtensions.cs     |  21 ++
 .../Formats/Jpeg/JpegEncoderCore.cs           | 185 ++++++++++--------
 2 files changed, 124 insertions(+), 82 deletions(-)

diff --git a/src/ImageSharp/Common/Extensions/StreamExtensions.cs b/src/ImageSharp/Common/Extensions/StreamExtensions.cs
index a200ffebcc..505ecccdda 100644
--- a/src/ImageSharp/Common/Extensions/StreamExtensions.cs
+++ b/src/ImageSharp/Common/Extensions/StreamExtensions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 
 using SixLabors.ImageSharp.Memory;
@@ -82,5 +83,25 @@ namespace SixLabors.ImageSharp
         {
             stream.Write(buffer.Array, 0, buffer.Length());
         }
+
+#if NET472 || NETSTANDARD1_3 || NETSTANDARD2_0
+        // This is a port of the CoreFX implementation and is MIT Licensed: https://github.com/dotnet/coreclr/blob/c4dca1072d15bdda64c754ad1ea474b1580fa554/src/System.Private.CoreLib/shared/System/IO/Stream.cs#L770
+        public static void Write(this Stream stream, ReadOnlySpan<byte> buffer)
+        {
+            // This uses ArrayPool<byte>.Shared, rather than taking a MemoryAllocator,
+            // in order to match the signature of the framework method that exists in
+            // .NET Core.
+            byte[] sharedBuffer = ArrayPool<byte>.Shared.Rent(buffer.Length);
+            try
+            {
+                buffer.CopyTo(sharedBuffer);
+                stream.Write(sharedBuffer, 0, buffer.Length);
+            }
+            finally
+            {
+                ArrayPool<byte>.Shared.Return(sharedBuffer);
+            }
+        }
+#endif
     }
 }
diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index b3f30f815f..4544244f08 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -27,85 +27,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// </summary>
         private const int QuantizationTableCount = 2;
 
-        /// <summary>
-        /// Counts the number of bits needed to hold an integer.
-        /// </summary>
-        private static readonly uint[] BitCountLut =
-            {
-                0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5,
-                5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-                6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-                7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-                8, 8, 8,
-            };
-
-        /// <summary>
-        /// The SOS (Start Of Scan) marker "\xff\xda" followed by 12 bytes:
-        /// - the marker length "\x00\x0c",
-        /// - the number of components "\x03",
-        /// - component 1 uses DC table 0 and AC table 0 "\x01\x00",
-        /// - component 2 uses DC table 1 and AC table 1 "\x02\x11",
-        /// - component 3 uses DC table 1 and AC table 1 "\x03\x11",
-        /// - the bytes "\x00\x3f\x00". Section B.2.3 of the spec says that for
-        /// sequential DCTs, those bytes (8-bit Ss, 8-bit Se, 4-bit Ah, 4-bit Al)
-        /// should be 0x00, 0x3f, 0x00&lt;&lt;4 | 0x00.
-        /// </summary>
-        private static readonly byte[] SosHeaderYCbCr =
-            {
-                JpegConstants.Markers.XFF, JpegConstants.Markers.SOS,
-
-                // Marker
-                0x00, 0x0c,
-
-                // Length (high byte, low byte), must be 6 + 2 * (number of components in scan)
-                0x03, // Number of components in a scan, 3
-                0x01, // Component Id Y
-                0x00, // DC/AC Huffman table
-                0x02, // Component Id Cb
-                0x11, // DC/AC Huffman table
-                0x03, // Component Id Cr
-                0x11, // DC/AC Huffman table
-                0x00, // Ss - Start of spectral selection.
-                0x3f, // Se - End of spectral selection.
-                0x00
-
-                // Ah + Ah (Successive approximation bit position high + low)
-            };
-
-        /// <summary>
-        /// The unscaled quantization tables in zig-zag order. Each
-        /// encoder copies and scales the tables according to its quality parameter.
-        /// The values are derived from section K.1 after converting from natural to
-        /// zig-zag order.
-        /// </summary>
-        private static readonly byte[,] UnscaledQuant =
-            {
-                    {
-                        // Luminance.
-                        16, 11, 12, 14, 12, 10, 16, 14, 13, 14, 18, 17, 16, 19, 24,
-                        40, 26, 24, 22, 22, 24, 49, 35, 37, 29, 40, 58, 51, 61, 60,
-                        57, 51, 56, 55, 64, 72, 92, 78, 64, 68, 87, 69, 55, 56, 80,
-                        109, 81, 87, 95, 98, 103, 104, 103, 62, 77, 113, 121, 112,
-                        100, 120, 92, 101, 103, 99,
-                    },
-                    {
-                        // Chrominance.
-                        17, 18, 18, 24, 21, 24, 47, 26, 26, 47, 99, 66, 56, 66,
-                        99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
-                        99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
-                        99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
-                        99, 99, 99, 99, 99, 99, 99, 99,
-                    }
-            };
-
         /// <summary>
         /// A scratch buffer to reduce allocations.
         /// </summary>
@@ -167,6 +88,103 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.subsample = options.Subsample;
         }
 
+        /// <summary>
+        /// Gets the counts the number of bits needed to hold an integer.
+        /// </summary>
+        // The C# compiler emits this as a compile-time constant embedded in the PE file.
+        // This is effectively compiled down to: return new ReadOnlySpan<byte>(&data, length)
+        // More details can be found: https://github.com/dotnet/roslyn/pull/24621
+        private static ReadOnlySpan<byte> BitCountLut => new byte[]
+            {
+                0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5,
+                5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+                6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+                7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+                8, 8, 8,
+            };
+
+        /// <summary>
+        /// Gets the SOS (Start Of Scan) marker "\xff\xda" followed by 12 bytes:
+        /// - the marker length "\x00\x0c",
+        /// - the number of components "\x03",
+        /// - component 1 uses DC table 0 and AC table 0 "\x01\x00",
+        /// - component 2 uses DC table 1 and AC table 1 "\x02\x11",
+        /// - component 3 uses DC table 1 and AC table 1 "\x03\x11",
+        /// - the bytes "\x00\x3f\x00". Section B.2.3 of the spec says that for
+        /// sequential DCTs, those bytes (8-bit Ss, 8-bit Se, 4-bit Ah, 4-bit Al)
+        /// should be 0x00, 0x3f, 0x00&lt;&lt;4 | 0x00.
+        /// </summary>
+        // The C# compiler emits this as a compile-time constant embedded in the PE file.
+        // This is effectively compiled down to: return new ReadOnlySpan<byte>(&data, length)
+        // More details can be found: https://github.com/dotnet/roslyn/pull/24621
+        private static ReadOnlySpan<byte> SosHeaderYCbCr => new byte[]
+            {
+                JpegConstants.Markers.XFF, JpegConstants.Markers.SOS,
+
+                // Marker
+                0x00, 0x0c,
+
+                // Length (high byte, low byte), must be 6 + 2 * (number of components in scan)
+                0x03, // Number of components in a scan, 3
+                0x01, // Component Id Y
+                0x00, // DC/AC Huffman table
+                0x02, // Component Id Cb
+                0x11, // DC/AC Huffman table
+                0x03, // Component Id Cr
+                0x11, // DC/AC Huffman table
+                0x00, // Ss - Start of spectral selection.
+                0x3f, // Se - End of spectral selection.
+                0x00
+
+                // Ah + Ah (Successive approximation bit position high + low)
+            };
+
+        /// <summary>
+        /// Gets the unscaled quantization tables in zig-zag order. Each
+        /// encoder copies and scales the tables according to its quality parameter.
+        /// The values are derived from section K.1 after converting from natural to
+        /// zig-zag order.
+        /// </summary>
+        // The C# compiler emits this as a compile-time constant embedded in the PE file.
+        // This is effectively compiled down to: return new ReadOnlySpan<byte>(&data, length)
+        // More details can be found: https://github.com/dotnet/roslyn/pull/24621
+        private static ReadOnlySpan<byte> UnscaledQuant_Luminance => new byte[]
+            {
+                // Luminance.
+                16, 11, 12, 14, 12, 10, 16, 14, 13, 14, 18, 17, 16, 19, 24,
+                40, 26, 24, 22, 22, 24, 49, 35, 37, 29, 40, 58, 51, 61, 60,
+                57, 51, 56, 55, 64, 72, 92, 78, 64, 68, 87, 69, 55, 56, 80,
+                109, 81, 87, 95, 98, 103, 104, 103, 62, 77, 113, 121, 112,
+                100, 120, 92, 101, 103, 99,
+            };
+
+        /// <summary>
+        /// Gets the unscaled quantization tables in zig-zag order. Each
+        /// encoder copies and scales the tables according to its quality parameter.
+        /// The values are derived from section K.1 after converting from natural to
+        /// zig-zag order.
+        /// </summary>
+        // The C# compiler emits this as a compile-time constant embedded in the PE file.
+        // This is effectively compiled down to: return new ReadOnlySpan<byte>(&data, length)
+        // More details can be found: https://github.com/dotnet/roslyn/pull/24621
+        private static ReadOnlySpan<byte> UnscaledQuant_Chrominance => new byte[]
+            {
+                // Chrominance.
+                17, 18, 18, 24, 21, 24, 47, 26, 26, 47, 99, 66, 56, 66,
+                99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
+                99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
+                99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
+                99, 99, 99, 99, 99, 99, 99, 99,
+            };
+
         /// <summary>
         /// Encode writes the image to the jpeg baseline format with the given options.
         /// </summary>
@@ -259,9 +277,12 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <param name="quant">The quantization table.</param>
         private static void InitQuantizationTable(int i, int scale, ref Block8x8F quant)
         {
+            DebugGuard.MustBeBetweenOrEqualTo(i, 0, 1, nameof(i));
+            var unscaledQuant = (i == 0) ? UnscaledQuant_Luminance : UnscaledQuant_Chrominance;
+
             for (int j = 0; j < Block8x8F.Size; j++)
             {
-                int x = UnscaledQuant[i, j];
+                int x = unscaledQuant[j];
                 x = ((x * scale) + 50) / 100;
                 if (x < 1)
                 {
@@ -357,7 +378,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             }
             else
             {
-                bt = 8 + BitCountLut[a >> 8];
+                bt = 8 + (uint)BitCountLut[a >> 8];
             }
 
             this.EmitHuff(index, (int)((uint)(runLength << 4) | bt));
@@ -871,7 +892,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             // TODO: Need a JpegScanEncoder<TPixel> class or struct that encapsulates the scan-encoding implementation. (Similar to JpegScanDecoder.)
             // TODO: We should allow grayscale writing.
-            this.outputStream.Write(SosHeaderYCbCr, 0, SosHeaderYCbCr.Length);
+            this.outputStream.Write(SosHeaderYCbCr);
 
             switch (this.subsample)
             {

From 9d7fd6315394e3286eb097ec64f1bc5c4c550183 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 26 Mar 2019 04:29:08 -0700
Subject: [PATCH 031/223] Remove enum boxing allocations (#863)

---
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs |  2 +-
 src/ImageSharp/Formats/Png/PngEncoderCore.cs | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index a922f30117..c8580144ad 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -92,7 +92,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             ImageMetaData metaData = image.MetaData;
             this.gifMetaData = metaData.GetFormatMetaData(GifFormat.Instance);
             this.colorTableMode = this.colorTableMode ?? this.gifMetaData.ColorTableMode;
-            bool useGlobalTable = this.colorTableMode.Equals(GifColorTableMode.Global);
+            bool useGlobalTable = this.colorTableMode == GifColorTableMode.Global;
 
             // Quantize the image returning a palette.
             QuantizedFrame<TPixel> quantized =
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 216f3129f9..96e2dd946d 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -185,7 +185,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             this.pngColorType = options.ColorType;
 
             // Specification recommends default filter method None for paletted images and Paeth for others.
-            this.pngFilterMethod = options.FilterMethod ?? (options.ColorType.Equals(PngColorType.Palette)
+            this.pngFilterMethod = options.FilterMethod ?? (options.ColorType == PngColorType.Palette
                 ? PngFilterMethod.None
                 : PngFilterMethod.Paeth);
             this.compressionLevel = options.CompressionLevel;
@@ -217,7 +217,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             this.writeGamma = this.gamma > 0;
             this.pngColorType = this.pngColorType ?? pngMetaData.ColorType;
             this.pngBitDepth = this.pngBitDepth ?? pngMetaData.BitDepth;
-            this.use16Bit = this.pngBitDepth.Equals(PngBitDepth.Bit16);
+            this.use16Bit = this.pngBitDepth == PngBitDepth.Bit16;
 
             // Ensure we are not allowing impossible combinations.
             if (!ColorTypes.ContainsKey(this.pngColorType.Value))
@@ -329,7 +329,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             Span<byte> rawScanlineSpan = this.rawScanline.GetSpan();
             ref byte rawScanlineSpanRef = ref MemoryMarshal.GetReference(rawScanlineSpan);
 
-            if (this.pngColorType.Equals(PngColorType.Grayscale))
+            if (this.pngColorType == PngColorType.Grayscale)
             {
                 if (this.use16Bit)
                 {
@@ -761,7 +761,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         private void WriteTransparencyChunk(Stream stream, PngMetaData pngMetaData)
         {
             Span<byte> alpha = this.chunkDataBuffer.AsSpan();
-            if (pngMetaData.ColorType.Equals(PngColorType.Rgb))
+            if (pngMetaData.ColorType == PngColorType.Rgb)
             {
                 if (pngMetaData.TransparentRgb48.HasValue && this.use16Bit)
                 {
@@ -782,7 +782,7 @@ namespace SixLabors.ImageSharp.Formats.Png
                     this.WriteChunk(stream, PngChunkType.Transparency, this.chunkDataBuffer, 0, 6);
                 }
             }
-            else if (pngMetaData.ColorType.Equals(PngColorType.Grayscale))
+            else if (pngMetaData.ColorType == PngColorType.Grayscale)
             {
                 if (pngMetaData.TransparentGray16.HasValue && this.use16Bit)
                 {

From 56f00399f5ebff7335fc4278bd07d64ebbdd9011 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 31 Mar 2019 22:55:14 +0200
Subject: [PATCH 032/223] make .FromVector4() destructive

---
 ImageSharp.sln.DotSettings                    |  1 +
 src/ImageSharp/Common/Helpers/Guard.cs        | 20 +++++++++++++++++++
 .../Argb32.PixelOperations.Generated.cs       |  4 ++--
 .../Bgr24.PixelOperations.Generated.cs        |  4 ++--
 .../Bgra32.PixelOperations.Generated.cs       |  4 ++--
 .../Rgb24.PixelOperations.Generated.cs        |  4 ++--
 .../Generated/_Common.ttinclude               |  4 ++--
 .../Rgba32.PixelOperations.cs                 |  4 ++--
 .../RgbaVector.PixelOperations.cs             |  2 +-
 .../PixelFormats/PixelOperations{TPixel}.cs   | 12 +++++++++--
 10 files changed, 44 insertions(+), 15 deletions(-)

diff --git a/ImageSharp.sln.DotSettings b/ImageSharp.sln.DotSettings
index 432f4524a0..8e7b5dd488 100644
--- a/ImageSharp.sln.DotSettings
+++ b/ImageSharp.sln.DotSettings
@@ -382,6 +382,7 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpKeepExistingMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpPlaceEmbeddedOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpRenamePlacementToArrangementMigration/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpUseContinuousIndentInsideBracesMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAddAccessorOwnerDeclarationBracesMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAlwaysTreatStructAsNotReorderableMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
diff --git a/src/ImageSharp/Common/Helpers/Guard.cs b/src/ImageSharp/Common/Helpers/Guard.cs
index d8cf69a52e..e86da78e30 100644
--- a/src/ImageSharp/Common/Helpers/Guard.cs
+++ b/src/ImageSharp/Common/Helpers/Guard.cs
@@ -257,6 +257,26 @@ namespace SixLabors.ImageSharp
             }
         }
 
+        /// <summary>
+        /// Verifies that the 'destination' span is not shorter than 'source'.
+        /// </summary>
+        /// <typeparam name="TSource">The source element type</typeparam>
+        /// <typeparam name="TDest">The destination element type</typeparam>
+        /// <param name="source">The source span</param>
+        /// <param name="destination">The destination span</param>
+        /// <param name="destinationParamName">The name of the argument for 'destination'</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void DestinationShouldNotBeTooShort<TSource, TDest>(
+            Span<TSource> source,
+            Span<TDest> destination,
+            string destinationParamName)
+        {
+            if (destination.Length < source.Length)
+            {
+                ThrowArgumentException($"Destination span is too short!", destinationParamName);
+            }
+        }
+
         /// <summary>
         /// Verifies, that the `source` span has the length of 'minLength', or longer.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
index 2ec965dfb0..add48cfd88 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Argb32> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Argb32> destPixels)
+            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index 711a9d1c16..372c71b32b 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Bgr24> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Bgr24> destPixels)
+            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
index b669dd5348..aa4680dccb 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Bgra32> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Bgra32> destPixels)
+            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index dbf3102c4a..f87ed88e56 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Rgb24> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<Rgb24> destPixels)
+            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
index f0675cb5b3..bfeccfca56 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
@@ -111,7 +111,7 @@ using System.Runtime.InteropServices;
     {
 #>
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
@@ -123,7 +123,7 @@ using System.Runtime.InteropServices;
             }
 
             /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, ReadOnlySpan<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
+            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
index 004b25cd33..2801b82257 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(
                 Configuration configuration,
-                ReadOnlySpan<Vector4> sourceVectors,
+                Span<Vector4> sourceVectors,
                 Span<Rgba32> destPixels)
             {
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromScaledVector4(
                 Configuration configuration,
-                ReadOnlySpan<Vector4> sourceVectors,
+                Span<Vector4> sourceVectors,
                 Span<Rgba32> destinationColors)
             {
                 this.FromVector4(configuration, sourceVectors, destinationColors);
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index bffaf57ddd..0cde00736a 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromScaledVector4(
                 Configuration configuration,
-                ReadOnlySpan<Vector4> sourceVectors,
+                Span<Vector4> sourceVectors,
                 Span<RgbaVector> destinationColors)
             {
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destinationColors, nameof(destinationColors));
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index 115dd7a43d..61e338b9c0 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -9,6 +9,14 @@ using System.Runtime.InteropServices;
 
 namespace SixLabors.ImageSharp.PixelFormats
 {
+    internal enum PixelConversionModifiers
+    {
+        None = 0,
+        Scale = 1 << 0,
+        Premultiply = 1 << 1,
+        SRgbCompand = 1 << 2,
+    }
+
     /// <summary>
     /// A stateless class implementing Strategy Pattern for batched pixel-data conversion operations
     /// for pixel buffers of type <typeparamref name="TPixel"/>.
@@ -30,7 +38,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="destPixels">The <see cref="Span{T}"/> to the destination colors.</param>
         internal virtual void FromVector4(
             Configuration configuration,
-            ReadOnlySpan<Vector4> sourceVectors,
+            Span<Vector4> sourceVectors,
             Span<TPixel> destPixels)
         {
             Guard.NotNull(configuration, nameof(configuration));
@@ -64,7 +72,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="destinationColors">The <see cref="Span{T}"/> to the destination colors.</param>
         internal virtual void FromScaledVector4(
             Configuration configuration,
-            ReadOnlySpan<Vector4> sourceVectors,
+            Span<Vector4> sourceVectors,
             Span<TPixel> destinationColors)
         {
             Guard.NotNull(configuration, nameof(configuration));

From 58573bbc229157269eff161d2de2317fa0562586 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 31 Mar 2019 23:28:34 +0200
Subject: [PATCH 033/223] replace FromScaledVector4() / ToScaledVector4() with
 flag usages

---
 .../Argb32.PixelOperations.Generated.cs       | 17 +---
 .../Bgr24.PixelOperations.Generated.cs        | 17 +---
 .../Bgra32.PixelOperations.Generated.cs       | 17 +---
 .../Rgb24.PixelOperations.Generated.cs        | 17 +---
 .../Generated/_Common.ttinclude               | 17 +---
 .../Rgba32.PixelOperations.cs                 | 24 +----
 .../RgbaVector.PixelOperations.cs             | 35 +++++---
 .../PixelFormats/PixelOperations{TPixel}.cs   | 88 ++++++++++++-------
 .../Utils/Vector4Converters.RgbaCompatible.cs |  4 +-
 9 files changed, 97 insertions(+), 139 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
index add48cfd88..e832bc97f0 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
@@ -42,29 +42,16 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
 
             /// <inheritdoc />
-            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Vector4> destVectors)
+            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
             }
-
-            /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels)
-            {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
-            }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Vector4> destVectors)
-            {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, true);
-            }
-
             /// <inheritdoc />
             internal override void ToRgba32(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Rgba32> destPixels)
             {
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index 372c71b32b..f1885c71ba 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -42,30 +42,17 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
 
             /// <inheritdoc />
-            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Vector4> destVectors)
+            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
             }
 
-            /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels)
-            {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
-            }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Vector4> destVectors)
-            {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, true);
-            }
-
-
             /// <inheritdoc />
             internal override void ToArgb32(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Argb32> destPixels)
             {
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
index aa4680dccb..2409f6784b 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
@@ -42,29 +42,16 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
 
             /// <inheritdoc />
-            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Vector4> destVectors)
+            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
             }
-
-            /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels)
-            {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
-            }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Vector4> destVectors)
-            {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, true);
-            }
-
             /// <inheritdoc />
             internal override void ToRgba32(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Rgba32> destPixels)
             {
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index f87ed88e56..ddf9813ab4 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -42,30 +42,17 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
 
             /// <inheritdoc />
-            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Vector4> destVectors)
+            internal override void ToVector4(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
             }
 
-            /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels)
-            {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
-            }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Vector4> destVectors)
-            {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, true);
-            }
-
-
             /// <inheritdoc />
             internal override void ToArgb32(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Argb32> destPixels)
             {
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
index bfeccfca56..0ff5b8605c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
@@ -111,29 +111,16 @@ using System.Runtime.InteropServices;
     {
 #>
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
+            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
             }
 
             /// <inheritdoc />
-            internal override void ToVector4(Configuration configuration, ReadOnlySpan<<#=pixelType#>> sourcePixels, Span<Vector4> destVectors)
+            internal override void ToVector4(Configuration configuration, ReadOnlySpan<<#=pixelType#>> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
             }
-
-            /// <inheritdoc />
-            internal override void FromScaledVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels)
-            {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, true);
-            }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(Configuration configuration, ReadOnlySpan<<#=pixelType#>> sourcePixels, Span<Vector4> destVectors)
-            {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, true);
-            }
-
 <#+
     }
 
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
index 2801b82257..7e8bb7f290 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
@@ -22,7 +22,8 @@ namespace SixLabors.ImageSharp.PixelFormats
             internal override void ToVector4(
                 Configuration configuration,
                 ReadOnlySpan<Rgba32> sourcePixels,
-                Span<Vector4> destVectors)
+                Span<Vector4> destVectors,
+                PixelConversionModifiers modifiers)
             {
                 Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
@@ -37,7 +38,8 @@ namespace SixLabors.ImageSharp.PixelFormats
             internal override void FromVector4(
                 Configuration configuration,
                 Span<Vector4> sourceVectors,
-                Span<Rgba32> destPixels)
+                Span<Rgba32> destPixels,
+                PixelConversionModifiers modifiers)
             {
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
 
@@ -47,24 +49,6 @@ namespace SixLabors.ImageSharp.PixelFormats
                     MemoryMarshal.Cast<Vector4, float>(sourceVectors),
                     MemoryMarshal.Cast<Rgba32, byte>(destPixels));
             }
-
-            /// <inheritdoc />
-            internal override void ToScaledVector4(
-                Configuration configuration,
-                ReadOnlySpan<Rgba32> sourceColors,
-                Span<Vector4> destinationVectors)
-            {
-                this.ToVector4(configuration, sourceColors, destinationVectors);
-            }
-
-            /// <inheritdoc />
-            internal override void FromScaledVector4(
-                Configuration configuration,
-                Span<Vector4> sourceVectors,
-                Span<Rgba32> destinationColors)
-            {
-                this.FromVector4(configuration, sourceVectors, destinationColors);
-            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index 0cde00736a..777d0da6dd 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -18,32 +18,43 @@ namespace SixLabors.ImageSharp.PixelFormats
         internal class PixelOperations : PixelOperations<RgbaVector>
         {
             /// <inheritdoc />
-            internal override void FromScaledVector4(
+            internal override void FromVector4(
                 Configuration configuration,
                 Span<Vector4> sourceVectors,
-                Span<RgbaVector> destinationColors)
+                Span<RgbaVector> destinationColors,
+                PixelConversionModifiers modifiers)
             {
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destinationColors, nameof(destinationColors));
 
-                MemoryMarshal.Cast<Vector4, RgbaVector>(sourceVectors).CopyTo(destinationColors);
+                // TODO: Repeating previous override behavior here. Not sure if this is correct!
+                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+                {
+                    MemoryMarshal.Cast<Vector4, RgbaVector>(sourceVectors).CopyTo(destinationColors);
+                }
+                else
+                {
+                    base.FromVector4(configuration, sourceVectors, destinationColors, modifiers);
+                }
             }
 
-            /// <inheritdoc />
-            internal override void ToScaledVector4(
-                Configuration configuration,
-                ReadOnlySpan<RgbaVector> sourceColors,
-                Span<Vector4> destinationVectors)
-                => this.ToVector4(configuration, sourceColors, destinationVectors);
-
             /// <inheritdoc />
             internal override void ToVector4(
                 Configuration configuration,
                 ReadOnlySpan<RgbaVector> sourcePixels,
-                Span<Vector4> destVectors)
+                Span<Vector4> destVectors,
+                PixelConversionModifiers modifiers)
             {
                 Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
-                MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
+                // TODO: Repeating previous override behavior here. Not sure if this is correct!
+                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+                {
+                    base.ToVector4(configuration, sourcePixels, destVectors, modifiers);
+                }
+                else
+                {
+                    MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
+                }
             }
         }
     }
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index 61e338b9c0..44c7f2e30f 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -17,6 +17,12 @@ namespace SixLabors.ImageSharp.PixelFormats
         SRgbCompand = 1 << 2,
     }
 
+    internal static class PixelConversionModifiersExtensions
+    {
+        public static bool IsDefined(this PixelConversionModifiers modifiers, PixelConversionModifiers expected) =>
+            (modifiers & expected) == expected;
+    }
+
     /// <summary>
     /// A stateless class implementing Strategy Pattern for batched pixel-data conversion operations
     /// for pixel buffers of type <typeparamref name="TPixel"/>.
@@ -32,71 +38,93 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <summary>
         /// Bulk version of <see cref="IPixel.FromVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
+        /// TODO: Rename to DestructiveFromVector4() + add explain behavior
         /// </summary>
         /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
         /// <param name="sourceVectors">The <see cref="Span{T}"/> to the source vectors.</param>
         /// <param name="destPixels">The <see cref="Span{T}"/> to the destination colors.</param>
+        /// <param name="modifiers">The <see cref="PixelConversionModifiers"/> to apply during the conversion</param>
         internal virtual void FromVector4(
             Configuration configuration,
             Span<Vector4> sourceVectors,
-            Span<TPixel> destPixels)
+            Span<TPixel> destPixels,
+            PixelConversionModifiers modifiers)
         {
             Guard.NotNull(configuration, nameof(configuration));
             Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
 
-            Utils.Vector4Converters.Default.DangerousFromVector4(sourceVectors, destPixels);
+            if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+            {
+                Utils.Vector4Converters.Default.DangerousFromScaledVector4(sourceVectors, destPixels);
+            }
+            else
+            {
+                Utils.Vector4Converters.Default.DangerousFromVector4(sourceVectors, destPixels);
+            }
         }
 
+        /// <summary>
+        /// TODO: For compatibility, should be inlined!
+        /// </summary>
+        internal void FromScaledVector4(
+            Configuration configuration,
+            Span<Vector4> sourceVectors,
+            Span<TPixel> destPixels) =>
+            this.FromVector4(configuration, sourceVectors, destPixels, PixelConversionModifiers.Scale);
+
+        /// <summary>
+        /// Bulk version of <see cref="IPixel.FromVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
+        /// TODO: Rename to DestructiveFromVector4() + add explain behavior
+        /// </summary>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
+        /// <param name="sourceVectors">The <see cref="Span{T}"/> to the source vectors.</param>
+        /// <param name="destPixels">The <see cref="Span{T}"/> to the destination colors.</param>
+        internal void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<TPixel> destPixels) =>
+            this.FromVector4(configuration, sourceVectors, destPixels, PixelConversionModifiers.None);
+
         /// <summary>
         /// Bulk version of <see cref="IPixel.ToVector4()"/> converting 'sourceColors.Length' pixels into 'destinationVectors'.
         /// </summary>
         /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
         /// <param name="sourcePixels">The <see cref="Span{T}"/> to the source colors.</param>
         /// <param name="destVectors">The <see cref="Span{T}"/> to the destination vectors.</param>
+        /// <param name="modifiers">The <see cref="PixelConversionModifiers"/> to apply during the conversion</param>
         internal virtual void ToVector4(
             Configuration configuration,
             ReadOnlySpan<TPixel> sourcePixels,
-            Span<Vector4> destVectors)
+            Span<Vector4> destVectors,
+            PixelConversionModifiers modifiers)
         {
             Guard.NotNull(configuration, nameof(configuration));
             Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
-            Utils.Vector4Converters.Default.DangerousToVector4(sourcePixels, destVectors);
+            if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+            {
+                Utils.Vector4Converters.Default.DangerousToScaledVector4(sourcePixels, destVectors);
+            }
+            else
+            {
+                Utils.Vector4Converters.Default.DangerousToVector4(sourcePixels, destVectors);
+            }
         }
 
         /// <summary>
-        /// Bulk version of <see cref="IPixel.FromScaledVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
+        /// Bulk version of <see cref="IPixel.ToVector4()"/> converting 'sourceColors.Length' pixels into 'destinationVectors'.
         /// </summary>
         /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
-        /// <param name="sourceVectors">The <see cref="Span{T}"/> to the source vectors.</param>
-        /// <param name="destinationColors">The <see cref="Span{T}"/> to the destination colors.</param>
-        internal virtual void FromScaledVector4(
+        /// <param name="sourcePixels">The <see cref="Span{T}"/> to the source colors.</param>
+        /// <param name="destVectors">The <see cref="Span{T}"/> to the destination vectors.</param>
+        internal virtual void ToVector4(
             Configuration configuration,
-            Span<Vector4> sourceVectors,
-            Span<TPixel> destinationColors)
-        {
-            Guard.NotNull(configuration, nameof(configuration));
-            Guard.DestinationShouldNotBeTooShort(sourceVectors, destinationColors, nameof(destinationColors));
-
-            Utils.Vector4Converters.Default.DangerousFromScaledVector4(sourceVectors, destinationColors);
-        }
+            ReadOnlySpan<TPixel> sourcePixels,
+            Span<Vector4> destVectors) =>
+            this.ToVector4(configuration, sourcePixels, destVectors, PixelConversionModifiers.None);
 
         /// <summary>
-        /// Bulk version of <see cref="IPixel.ToScaledVector4()"/> converting 'sourceColors.Length' pixels into 'destinationVectors'.
+        /// TODO: For compatibility, should be inlined!
         /// </summary>
-        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
-        /// <param name="sourceColors">The <see cref="Span{T}"/> to the source colors.</param>
-        /// <param name="destinationVectors">The <see cref="Span{T}"/> to the destination vectors.</param>
-        internal virtual void ToScaledVector4(
-            Configuration configuration,
-            ReadOnlySpan<TPixel> sourceColors,
-            Span<Vector4> destinationVectors)
-        {
-            Guard.NotNull(configuration, nameof(configuration));
-            Guard.DestinationShouldNotBeTooShort(sourceColors, destinationVectors, nameof(destinationVectors));
-
-            Utils.Vector4Converters.Default.DangerousToScaledVector4(sourceColors, destinationVectors);
-        }
+        internal void ToScaledVector4(Configuration configuration, ReadOnlySpan<TPixel> sourcePixels, Span<Vector4> destVectors) =>
+            this.ToVector4(configuration, sourcePixels, destVectors, PixelConversionModifiers.Scale);
 
         /// <summary>
         /// Converts 'sourceColors.Length' pixels from 'sourceColors' into 'destinationColors'.
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
index 06c33d79c7..006ebe8284 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             private static readonly int Vector4ConversionThreshold = CalculateVector4ConversionThreshold();
 
             /// <summary>
-            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.ToVector4"/>
+            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.ToVector4(SixLabors.ImageSharp.Configuration,System.ReadOnlySpan{TPixel},System.Span{System.Numerics.Vector4},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
             /// and <see cref="PixelOperations{TPixel}.ToScaledVector4"/>
             /// which is applicable for <see cref="Rgba32"/>-compatible pixel types where <see cref="IPixel.ToVector4"/>
             /// returns the same scaled result as <see cref="IPixel.ToScaledVector4"/>.
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             }
 
             /// <summary>
-            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.FromVector4"/>
+            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.FromVector4(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
             /// and <see cref="PixelOperations{TPixel}.FromScaledVector4"/>
             /// which is applicable for <see cref="Rgba32"/>-compatible pixel types where <see cref="IPixel.ToVector4"/>
             /// returns the same scaled result as <see cref="IPixel.ToScaledVector4"/>.

From f637506bedab6270dab4985bffb872b2d9972486 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 31 Mar 2019 23:40:56 +0200
Subject: [PATCH 034/223] copy companding refactor from #847

---
 .../ColorSpaces/Companding/SRgbCompanding.cs  | 24 +++++++++++--------
 .../PixelFormats/PixelConversionModifiers.cs  | 16 +++++++++++++
 .../PixelConversionModifiersExtensions.cs     | 20 ++++++++++++++++
 .../PixelFormats/PixelOperations{TPixel}.cs   | 14 -----------
 .../Colorspaces/Companding/CompandingTests.cs | 20 ++++++++++++++--
 5 files changed, 68 insertions(+), 26 deletions(-)
 create mode 100644 src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
 create mode 100644 src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs

diff --git a/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs b/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
index 5ae4629137..bbd454fbe8 100644
--- a/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
@@ -30,9 +30,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
             for (int i = 0; i < vectors.Length; i++)
             {
                 ref Vector4 v = ref Unsafe.Add(ref baseRef, i);
-                v.X = Expand(v.X);
-                v.Y = Expand(v.Y);
-                v.Z = Expand(v.Z);
+                Expand(ref v);
             }
         }
 
@@ -48,9 +46,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
             for (int i = 0; i < vectors.Length; i++)
             {
                 ref Vector4 v = ref Unsafe.Add(ref baseRef, i);
-                v.X = Compress(v.X);
-                v.Y = Compress(v.Y);
-                v.Z = Compress(v.Z);
+                Compress(ref v);
             }
         }
 
@@ -58,17 +54,25 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// Expands a companded vector to its linear equivalent with respect to the energy.
         /// </summary>
         /// <param name="vector">The vector.</param>
-        /// <returns>The <see cref="Vector4"/> representing the linear channel values.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public static Vector4 Expand(Vector4 vector) => new Vector4(Expand(vector.X), Expand(vector.Y), Expand(vector.Z), vector.W);
+        public static void Expand(ref Vector4 vector)
+        {
+            vector.X = Expand(vector.X);
+            vector.Y = Expand(vector.Y);
+            vector.Z = Expand(vector.Z);
+        }
 
         /// <summary>
         /// Compresses an uncompanded vector (linear) to its nonlinear equivalent.
         /// </summary>
         /// <param name="vector">The vector.</param>
-        /// <returns>The <see cref="Vector4"/> representing the nonlinear channel values.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public static Vector4 Compress(Vector4 vector) => new Vector4(Compress(vector.X), Compress(vector.Y), Compress(vector.Z), vector.W);
+        public static void Compress(ref Vector4 vector)
+        {
+            vector.X = Compress(vector.X);
+            vector.Y = Compress(vector.Y);
+            vector.Z = Compress(vector.Z);
+        }
 
         /// <summary>
         /// Expands a companded channel to its linear equivalent with respect to the energy.
diff --git a/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
new file mode 100644
index 0000000000..536a23061a
--- /dev/null
+++ b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
@@ -0,0 +1,16 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+namespace SixLabors.ImageSharp.PixelFormats
+{
+    [Flags]
+    internal enum PixelConversionModifiers
+    {
+        None = 0,
+        Scale = 1 << 0,
+        Premultiply = 1 << 1,
+        SRgbCompand = 1 << 2,
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs b/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs
new file mode 100644
index 0000000000..bf77f85114
--- /dev/null
+++ b/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs
@@ -0,0 +1,20 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Runtime.CompilerServices;
+
+namespace SixLabors.ImageSharp.PixelFormats
+{
+    internal static class PixelConversionModifiersExtensions
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool IsDefined(this PixelConversionModifiers modifiers, PixelConversionModifiers expected) =>
+            (modifiers & expected) == expected;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PixelConversionModifiers Remove(
+            this PixelConversionModifiers modifiers,
+            PixelConversionModifiers removeThis) =>
+            modifiers & ~removeThis;
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index 44c7f2e30f..ea5bc876fe 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -9,20 +9,6 @@ using System.Runtime.InteropServices;
 
 namespace SixLabors.ImageSharp.PixelFormats
 {
-    internal enum PixelConversionModifiers
-    {
-        None = 0,
-        Scale = 1 << 0,
-        Premultiply = 1 << 1,
-        SRgbCompand = 1 << 2,
-    }
-
-    internal static class PixelConversionModifiersExtensions
-    {
-        public static bool IsDefined(this PixelConversionModifiers modifiers, PixelConversionModifiers expected) =>
-            (modifiers & expected) == expected;
-    }
-
     /// <summary>
     /// A stateless class implementing Strategy Pattern for batched pixel-data conversion operations
     /// for pixel buffers of type <typeparamref name="TPixel"/>.
diff --git a/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs b/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
index 91cacfe3f0..b2ee030483 100644
--- a/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
+++ b/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
@@ -53,7 +53,15 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
         {
             var rnd = new Random(42);
             Vector4[] source = rnd.GenerateRandomVectorArray(length, 0, 1);
-            Vector4[] expected = source.Select(v => SRgbCompanding.Expand(v)).ToArray();
+            var expected = new Vector4[source.Length];
+
+            for (int i = 0; i < source.Length; i++)
+            {
+                Vector4 s = source[i];
+                ref Vector4 e = ref expected[i];
+                SRgbCompanding.Expand(ref s);
+                e = s;
+            }
 
             SRgbCompanding.Expand(source);
 
@@ -68,7 +76,15 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
         {
             var rnd = new Random(42);
             Vector4[] source = rnd.GenerateRandomVectorArray(length, 0, 1);
-            Vector4[] expected = source.Select(v => SRgbCompanding.Compress(v)).ToArray();
+            var expected = new Vector4[source.Length];
+
+            for (int i = 0; i < source.Length; i++)
+            {
+                Vector4 s = source[i];
+                ref Vector4 e = ref expected[i];
+                SRgbCompanding.Compress(ref s);
+                e = s;
+            }
 
             SRgbCompanding.Compress(source);
 

From b4cb22220392117b55b217c6a96ec85a86bfdaf3 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 31 Mar 2019 23:49:43 +0200
Subject: [PATCH 035/223] add (failing) tests from #847

---
 ...xelOperationsTests.Rgb24OperationsTests.cs |  23 ++
 .../PixelOperations/PixelOperationsTests.cs   | 270 +++++++++++++++++-
 2 files changed, 280 insertions(+), 13 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs

diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
new file mode 100644
index 0000000000..fa51c2278b
--- /dev/null
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
@@ -0,0 +1,23 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
+{
+    public partial class PixelOperationsTests
+    {
+        public class Rgb24OperationsTests : PixelOperationsTests<Rgb24>
+        {
+            public Rgb24OperationsTests(ITestOutputHelper output)
+                : base(output)
+            {
+            }
+
+            [Fact]
+            public void IsSpecialImplementation() => Assert.IsType<Rgb24.PixelOperations>(PixelOperations<Rgb24>.Instance);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index d9845e4741..9433e19c9b 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -6,7 +6,7 @@ using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-
+using SixLabors.ImageSharp.ColorSpaces.Companding;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -70,25 +70,33 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
 
         internal static PixelOperations<TPixel> Operations => PixelOperations<TPixel>.Instance;
 
-        internal static TPixel[] CreateExpectedPixelData(Vector4[] source)
+        internal static TPixel[] CreateExpectedPixelData(Vector4[] source, RefAction<Vector4> vectorModifier = null)
         {
             var expected = new TPixel[source.Length];
 
             for (int i = 0; i < expected.Length; i++)
             {
-                expected[i].FromVector4(source[i]);
+                Vector4 v = source[i];
+                vectorModifier?.Invoke(ref v);
+
+                expected[i].FromVector4(v);
             }
+
             return expected;
         }
 
-        internal static TPixel[] CreateScaledExpectedPixelData(Vector4[] source)
+        internal static TPixel[] CreateScaledExpectedPixelData(Vector4[] source, RefAction<Vector4> vectorModifier = null)
         {
             var expected = new TPixel[source.Length];
 
             for (int i = 0; i < expected.Length; i++)
             {
-                expected[i].FromScaledVector4(source[i]);
+                Vector4 v = source[i];
+                vectorModifier?.Invoke(ref v);
+
+                expected[i].FromScaledVector4(v);
             }
+
             return expected;
         }
 
@@ -120,6 +128,112 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             );
         }
 
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void FromCompandedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                SRgbCompanding.Expand(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                SRgbCompanding.Compress(ref v);
+            }
+
+            Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
+            TPixel[] expected = CreateScaledExpectedPixelData(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.FromVector4(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Scale)
+            );
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void FromPremultipliedVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+            }
+
+            Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
+            TPixel[] expected = CreateExpectedPixelData(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.FromVector4(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.Premultiply)
+            );
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void FromPremultipliedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+            }
+
+            Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
+            TPixel[] expected = CreateScaledExpectedPixelData(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.FromVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale)
+            );
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void FromCompandedPremultipliedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                SRgbCompanding.Expand(ref v);
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+                SRgbCompanding.Compress(ref v);
+            }
+
+            Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
+            TPixel[] expected = CreateScaledExpectedPixelData(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.FromVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Premultiply)
+            );
+        }
+
         [Theory]
         [MemberData(nameof(ArraySizesData))]
         public void ToVector4(int count)
@@ -148,6 +262,115 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             );
         }
 
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void ToCompandedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                SRgbCompanding.Compress(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                SRgbCompanding.Expand(ref v);
+            }
+
+            TPixel[] source = CreateScaledPixelTestData(count, (ref Vector4 v) => sourceAction(ref v));
+            Vector4[] expected = CreateExpectedScaledVector4Data(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.ToVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Scale)
+            );
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void ToPremultipliedVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            TPixel[] source = CreatePixelTestData(count, (ref Vector4 v) => sourceAction(ref v));
+            Vector4[] expected = CreateExpectedVector4Data(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.ToVector4(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.Premultiply)
+            );
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void ToPremultipliedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            TPixel[] source = CreateScaledPixelTestData(count, (ref Vector4 v) => sourceAction(ref v));
+            Vector4[] expected = CreateExpectedScaledVector4Data(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.ToVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale));
+        }
+
+        [Theory]
+        [MemberData(nameof(ArraySizesData))]
+        public void ToCompandedPremultipliedScaledVector4(int count)
+        {
+            void sourceAction(ref Vector4 v)
+            {
+                Vector4Utils.UnPremultiply(ref v);
+                SRgbCompanding.Compress(ref v);
+            }
+
+            void expectedAction(ref Vector4 v)
+            {
+                SRgbCompanding.Expand(ref v);
+                Vector4Utils.Premultiply(ref v);
+            }
+
+            TPixel[] source = CreateScaledPixelTestData(count, (ref Vector4 v) => sourceAction(ref v));
+            Vector4[] expected = CreateExpectedScaledVector4Data(source, (ref Vector4 v) => expectedAction(ref v));
+
+            TestOperation(
+                source,
+                expected,
+                (s, d) => Operations.ToVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale)
+            );
+        }
+
         [Theory]
         [MemberData(nameof(ArraySizesData))]
         public void FromArgb32Bytes(int count)
@@ -477,25 +700,37 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             );
         }
 
-        internal static Vector4[] CreateExpectedVector4Data(TPixel[] source)
+        public delegate void RefAction<T1>(ref T1 arg1);
+
+        internal static Vector4[] CreateExpectedVector4Data(TPixel[] source, RefAction<Vector4> vectorModifier = null)
         {
             var expected = new Vector4[source.Length];
 
             for (int i = 0; i < expected.Length; i++)
             {
-                expected[i] = source[i].ToVector4();
+                var v = source[i].ToVector4();
+
+                vectorModifier?.Invoke(ref v);
+
+                expected[i] = v;
             }
+
             return expected;
         }
 
-        internal static Vector4[] CreateExpectedScaledVector4Data(TPixel[] source)
+        internal static Vector4[] CreateExpectedScaledVector4Data(TPixel[] source, RefAction<Vector4> vectorModifier = null)
         {
             var expected = new Vector4[source.Length];
 
             for (int i = 0; i < expected.Length; i++)
             {
-                expected[i] = source[i].ToScaledVector4();
+                Vector4 v = source[i].ToScaledVector4();
+
+                vectorModifier?.Invoke(ref v);
+
+                expected[i] = v;
             }
+
             return expected;
         }
 
@@ -513,19 +748,22 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             }
         }
 
-        internal static Vector4[] CreateVector4TestData(int length)
+        internal static Vector4[] CreateVector4TestData(int length, RefAction<Vector4> vectorModifier = null)
         {
             var result = new Vector4[length];
             var rnd = new Random(42); // Deterministic random values
 
             for (int i = 0; i < result.Length; i++)
             {
-                result[i] = GetVector(rnd);
+                Vector4 v = GetVector(rnd);
+                vectorModifier?.Invoke(ref v);
+
+                result[i] = v;
             }
             return result;
         }
 
-        internal static TPixel[] CreatePixelTestData(int length)
+        internal static TPixel[] CreatePixelTestData(int length, RefAction<Vector4> vectorModifier = null)
         {
             var result = new TPixel[length];
 
@@ -534,13 +772,16 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             for (int i = 0; i < result.Length; i++)
             {
                 Vector4 v = GetVector(rnd);
+
+                vectorModifier?.Invoke(ref v);
+
                 result[i].FromVector4(v);
             }
 
             return result;
         }
 
-        internal static TPixel[] CreateScaledPixelTestData(int length)
+        internal static TPixel[] CreateScaledPixelTestData(int length, RefAction<Vector4> vectorModifier = null)
         {
             var result = new TPixel[length];
 
@@ -549,6 +790,9 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             for (int i = 0; i < result.Length; i++)
             {
                 Vector4 v = GetVector(rnd);
+
+                vectorModifier?.Invoke(ref v);
+
                 result[i].FromScaledVector4(v);
             }
 

From c3d4e4d8f4585b2325017bc7ccf0d428bc41841d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 00:56:11 +0200
Subject: [PATCH 036/223] all pixel types implemented except RgbaVector

---
 .../Argb32.PixelOperations.Generated.cs       |  4 +-
 .../Bgr24.PixelOperations.Generated.cs        |  4 +-
 .../Bgra32.PixelOperations.Generated.cs       |  4 +-
 .../Rgb24.PixelOperations.Generated.cs        |  4 +-
 .../Generated/_Common.ttinclude               |  4 +-
 .../Rgba32.PixelOperations.cs                 |  6 +-
 .../RgbaVector.PixelOperations.cs             |  6 ++
 .../PixelFormats/PixelOperations{TPixel}.cs   | 20 +----
 .../Utils/Vector4Converters.Default.cs        | 74 +++++++++++++++++--
 .../Utils/Vector4Converters.RgbaCompatible.cs | 46 ++++--------
 .../PixelFormats/Utils/Vector4Converters.cs   | 48 ++++++++++++
 .../PixelOperations/PixelOperationsTests.cs   |  8 +-
 12 files changed, 158 insertions(+), 70 deletions(-)
 create mode 100644 src/ImageSharp/PixelFormats/Utils/Vector4Converters.cs

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
index e832bc97f0..c49f3f8343 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
             }
             /// <inheritdoc />
             internal override void ToRgba32(Configuration configuration, ReadOnlySpan<Argb32> sourcePixels, Span<Rgba32> destPixels)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index f1885c71ba..a9eca8994c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
index 2409f6784b..73eddc235e 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
             }
             /// <inheritdoc />
             internal override void ToRgba32(Configuration configuration, ReadOnlySpan<Bgra32> sourcePixels, Span<Rgba32> destPixels)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index ddf9813ab4..1648f53416 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
index 0ff5b8605c..6286eaf72c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
@@ -113,13 +113,13 @@ using System.Runtime.InteropServices;
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, false);
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<<#=pixelType#>> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, false);
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
             }
 <#+
     }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
index 7e8bb7f290..aa9b82be7d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
@@ -4,6 +4,8 @@
 using System;
 using System.Numerics;
 using System.Runtime.InteropServices;
+
+using SixLabors.ImageSharp.PixelFormats.Utils;
 using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.PixelFormats
@@ -28,10 +30,10 @@ namespace SixLabors.ImageSharp.PixelFormats
                 Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
                 destVectors = destVectors.Slice(0, sourcePixels.Length);
-
                 SimdUtils.BulkConvertByteToNormalizedFloat(
                     MemoryMarshal.Cast<Rgba32, byte>(sourcePixels),
                     MemoryMarshal.Cast<Vector4, float>(destVectors));
+                Vector4Converters.ApplyForwardConversionModifiers(destVectors, modifiers);
             }
 
             /// <inheritdoc />
@@ -44,7 +46,7 @@ namespace SixLabors.ImageSharp.PixelFormats
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
 
                 destPixels = destPixels.Slice(0, sourceVectors.Length);
-
+                Vector4Converters.ApplyBackwardConversionModifiers(sourceVectors, modifiers);
                 SimdUtils.BulkConvertNormalizedFloatToByteClampOverflows(
                     MemoryMarshal.Cast<Vector4, float>(sourceVectors),
                     MemoryMarshal.Cast<Rgba32, byte>(destPixels));
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index 777d0da6dd..3c4d951ee7 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -5,6 +5,8 @@ using System;
 using System.Numerics;
 using System.Runtime.InteropServices;
 
+using SixLabors.ImageSharp.PixelFormats.Utils;
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -26,6 +28,8 @@ namespace SixLabors.ImageSharp.PixelFormats
             {
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destinationColors, nameof(destinationColors));
 
+                Vector4Converters.ApplyBackwardConversionModifiers(sourceVectors, modifiers);
+
                 // TODO: Repeating previous override behavior here. Not sure if this is correct!
                 if (modifiers.IsDefined(PixelConversionModifiers.Scale))
                 {
@@ -55,6 +59,8 @@ namespace SixLabors.ImageSharp.PixelFormats
                 {
                     MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
                 }
+
+                Vector4Converters.ApplyForwardConversionModifiers(destVectors, modifiers);
             }
         }
     }
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index ea5bc876fe..53181e7a94 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -37,16 +37,8 @@ namespace SixLabors.ImageSharp.PixelFormats
             PixelConversionModifiers modifiers)
         {
             Guard.NotNull(configuration, nameof(configuration));
-            Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
 
-            if (modifiers.IsDefined(PixelConversionModifiers.Scale))
-            {
-                Utils.Vector4Converters.Default.DangerousFromScaledVector4(sourceVectors, destPixels);
-            }
-            else
-            {
-                Utils.Vector4Converters.Default.DangerousFromVector4(sourceVectors, destPixels);
-            }
+            Utils.Vector4Converters.Default.FromVector4(sourceVectors, destPixels, modifiers);
         }
 
         /// <summary>
@@ -82,16 +74,8 @@ namespace SixLabors.ImageSharp.PixelFormats
             PixelConversionModifiers modifiers)
         {
             Guard.NotNull(configuration, nameof(configuration));
-            Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
-            if (modifiers.IsDefined(PixelConversionModifiers.Scale))
-            {
-                Utils.Vector4Converters.Default.DangerousToScaledVector4(sourcePixels, destVectors);
-            }
-            else
-            {
-                Utils.Vector4Converters.Default.DangerousToVector4(sourcePixels, destVectors);
-            }
+            Utils.Vector4Converters.Default.ToVector4(sourcePixels, destVectors, modifiers);
         }
 
         /// <summary>
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
index e784e3b5a6..4c4e60276d 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.Default.cs
@@ -6,6 +6,8 @@ using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
+using SixLabors.ImageSharp.ColorSpaces.Companding;
+
 namespace SixLabors.ImageSharp.PixelFormats.Utils
 {
     /// <summary>
@@ -15,13 +17,75 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
     {
         /// <summary>
         /// Provides default implementations for batched to/from <see cref="Vector4"/> conversion.
-        /// WARNING: The methods are operating without bounds checking and input validation!
+        /// WARNING: The methods prefixed with "Unsafe" are operating without bounds checking and input validation!
         /// Input validation is the responsibility of the caller!
         /// </summary>
         public static class Default
         {
             [MethodImpl(InliningOptions.ShortMethod)]
-            internal static void DangerousFromVector4<TPixel>(
+            public static void FromVector4<TPixel>(
+                Span<Vector4> sourceVectors,
+                Span<TPixel> destPixels,
+                PixelConversionModifiers modifiers)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                Guard.DestinationShouldNotBeTooShort(sourceVectors, destPixels, nameof(destPixels));
+
+                UnsafeFromVector4(sourceVectors, destPixels, modifiers);
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public static void ToVector4<TPixel>(
+                ReadOnlySpan<TPixel> sourcePixels,
+                Span<Vector4> destVectors,
+                PixelConversionModifiers modifiers)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
+
+                UnsafeToVector4(sourcePixels, destVectors, modifiers);
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public static void UnsafeFromVector4<TPixel>(
+                Span<Vector4> sourceVectors,
+                Span<TPixel> destPixels,
+                PixelConversionModifiers modifiers)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                ApplyBackwardConversionModifiers(sourceVectors, modifiers);
+
+                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+                {
+                    UnsafeFromScaledVector4Core(sourceVectors, destPixels);
+                }
+                else
+                {
+                    UnsafeFromVector4Core(sourceVectors, destPixels);
+                }
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public static void UnsafeToVector4<TPixel>(
+                ReadOnlySpan<TPixel> sourcePixels,
+                Span<Vector4> destVectors,
+                PixelConversionModifiers modifiers)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
+                {
+                    UnsafeToScaledVector4Core(sourcePixels, destVectors);
+                }
+                else
+                {
+                    UnsafeToVector4Core(sourcePixels, destVectors);
+                }
+
+                ApplyForwardConversionModifiers(destVectors, modifiers);
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            private static void UnsafeFromVector4Core<TPixel>(
                 ReadOnlySpan<Vector4> sourceVectors,
                 Span<TPixel> destPixels)
                 where TPixel : struct, IPixel<TPixel>
@@ -38,7 +102,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             }
 
             [MethodImpl(InliningOptions.ShortMethod)]
-            internal static void DangerousToVector4<TPixel>(
+            private static void UnsafeToVector4Core<TPixel>(
                 ReadOnlySpan<TPixel> sourcePixels,
                 Span<Vector4> destVectors)
                 where TPixel : struct, IPixel<TPixel>
@@ -55,7 +119,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             }
 
             [MethodImpl(InliningOptions.ShortMethod)]
-            internal static void DangerousFromScaledVector4<TPixel>(
+            private static void UnsafeFromScaledVector4Core<TPixel>(
                 ReadOnlySpan<Vector4> sourceVectors,
                 Span<TPixel> destinationColors)
                 where TPixel : struct, IPixel<TPixel>
@@ -72,7 +136,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             }
 
             [MethodImpl(InliningOptions.ShortMethod)]
-            internal static void DangerousToScaledVector4<TPixel>(
+            private static void UnsafeToScaledVector4Core<TPixel>(
                 ReadOnlySpan<TPixel> sourceColors,
                 Span<Vector4> destinationVectors)
                 where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
index 006ebe8284..efe4dc69a6 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
@@ -7,6 +7,8 @@ using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
+using SixLabors.ImageSharp.ColorSpaces.Companding;
+
 namespace SixLabors.ImageSharp.PixelFormats.Utils
 {
     /// <content>
@@ -41,7 +43,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
                 PixelOperations<TPixel> pixelOperations,
                 ReadOnlySpan<TPixel> sourcePixels,
                 Span<Vector4> destVectors,
-                bool scaled)
+                PixelConversionModifiers modifiers)
                 where TPixel : struct, IPixel<TPixel>
             {
                 Guard.NotNull(configuration, nameof(configuration));
@@ -52,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
                 // Not worth for small buffers:
                 if (count < Vector4ConversionThreshold)
                 {
-                    ToVector4Fallback(sourcePixels, destVectors, scaled);
+                    Default.UnsafeToVector4(sourcePixels, destVectors, modifiers);
 
                     return;
                 }
@@ -70,6 +72,9 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
                     MemoryMarshal.Cast<Vector4, float>(destVectors.Slice(0, countWithoutLastItem)));
 
                 destVectors[countWithoutLastItem] = sourcePixels[countWithoutLastItem].ToVector4();
+
+                // TODO: Investigate optimized 1-pass approach!
+                ApplyForwardConversionModifiers(destVectors, modifiers);
             }
 
             /// <summary>
@@ -83,9 +88,9 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             internal static void FromVector4<TPixel>(
                 Configuration configuration,
                 PixelOperations<TPixel> pixelOperations,
-                ReadOnlySpan<Vector4> sourceVectors,
+                Span<Vector4> sourceVectors,
                 Span<TPixel> destPixels,
-                bool scaled)
+                PixelConversionModifiers modifiers)
                 where TPixel : struct, IPixel<TPixel>
             {
                 Guard.NotNull(configuration, nameof(configuration));
@@ -96,11 +101,14 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
                 // Not worth for small buffers:
                 if (count < Vector4ConversionThreshold)
                 {
-                    FromVector4Fallback(sourceVectors, destPixels, scaled);
+                    Default.UnsafeFromVector4(sourceVectors, destPixels, modifiers);
 
                     return;
                 }
 
+                // TODO: Investigate optimized 1-pass approach!
+                ApplyBackwardConversionModifiers(sourceVectors, modifiers);
+
                 // For the opposite direction it's not easy to implement the trick used in RunRgba32CompatibleToVector4Conversion,
                 // so let's allocate a temporary buffer as usually:
                 using (IMemoryOwner<Rgba32> tempBuffer = configuration.MemoryAllocator.Allocate<Rgba32>(count))
@@ -115,34 +123,6 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
                 }
             }
 
-            [MethodImpl(InliningOptions.ColdPath)]
-            private static void ToVector4Fallback<TPixel>(ReadOnlySpan<TPixel> sourcePixels, Span<Vector4> destVectors, bool scaled)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                if (scaled)
-                {
-                    Default.DangerousToScaledVector4(sourcePixels, destVectors);
-                }
-                else
-                {
-                    Default.DangerousToVector4(sourcePixels, destVectors);
-                }
-            }
-
-            [MethodImpl(InliningOptions.ColdPath)]
-            private static void FromVector4Fallback<TPixel>(ReadOnlySpan<Vector4> sourceVectors, Span<TPixel> destPixels, bool scaled)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                if (scaled)
-                {
-                    Default.DangerousFromScaledVector4(sourceVectors, destPixels);
-                }
-                else
-                {
-                    Default.DangerousFromVector4(sourceVectors, destPixels);
-                }
-            }
-
             private static int CalculateVector4ConversionThreshold()
             {
                 if (!Vector.IsHardwareAccelerated)
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.cs
new file mode 100644
index 0000000000..447869a7d5
--- /dev/null
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.cs
@@ -0,0 +1,48 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+using SixLabors.ImageSharp.ColorSpaces.Companding;
+
+namespace SixLabors.ImageSharp.PixelFormats.Utils
+{
+    internal static partial class Vector4Converters
+    {
+        /// <summary>
+        /// Apply modifiers used requested by ToVector4() conversion.
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static void ApplyForwardConversionModifiers(Span<Vector4> vectors, PixelConversionModifiers modifiers)
+        {
+            if (modifiers.IsDefined(PixelConversionModifiers.SRgbCompand))
+            {
+                SRgbCompanding.Expand(vectors);
+            }
+
+            if (modifiers.IsDefined(PixelConversionModifiers.Premultiply))
+            {
+                Vector4Utils.Premultiply(vectors);
+            }
+        }
+
+        /// <summary>
+        /// Apply modifiers used requested by FromVector4() conversion.
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static void ApplyBackwardConversionModifiers(Span<Vector4> vectors, PixelConversionModifiers modifiers)
+        {
+            if (modifiers.IsDefined(PixelConversionModifiers.Premultiply))
+            {
+                Vector4Utils.UnPremultiply(vectors);
+            }
+
+            if (modifiers.IsDefined(PixelConversionModifiers.SRgbCompand))
+            {
+                SRgbCompanding.Compress(vectors);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index 9433e19c9b..f51c790348 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -148,7 +148,11 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Scale)
+                (s, d) => Operations.FromVector4(
+                    this.Configuration,
+                    s,
+                    d.GetSpan(),
+                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Scale)
             );
         }
 
@@ -230,7 +234,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
                     this.Configuration,
                     s,
                     d.GetSpan(),
-                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Premultiply)
+                    PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale)
             );
         }
 

From d33be1cba4e6e1e61eec897820586e2eac187db8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 01:00:34 +0200
Subject: [PATCH 037/223] fix RgbaVector

---
 .../RgbaVector.PixelOperations.cs             | 22 ++-----------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index 3c4d951ee7..2d52f98cb6 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -29,16 +29,7 @@ namespace SixLabors.ImageSharp.PixelFormats
                 Guard.DestinationShouldNotBeTooShort(sourceVectors, destinationColors, nameof(destinationColors));
 
                 Vector4Converters.ApplyBackwardConversionModifiers(sourceVectors, modifiers);
-
-                // TODO: Repeating previous override behavior here. Not sure if this is correct!
-                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
-                {
-                    MemoryMarshal.Cast<Vector4, RgbaVector>(sourceVectors).CopyTo(destinationColors);
-                }
-                else
-                {
-                    base.FromVector4(configuration, sourceVectors, destinationColors, modifiers);
-                }
+                MemoryMarshal.Cast<Vector4, RgbaVector>(sourceVectors).CopyTo(destinationColors);
             }
 
             /// <inheritdoc />
@@ -50,16 +41,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             {
                 Guard.DestinationShouldNotBeTooShort(sourcePixels, destVectors, nameof(destVectors));
 
-                // TODO: Repeating previous override behavior here. Not sure if this is correct!
-                if (modifiers.IsDefined(PixelConversionModifiers.Scale))
-                {
-                    base.ToVector4(configuration, sourcePixels, destVectors, modifiers);
-                }
-                else
-                {
-                    MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
-                }
-
+                MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
                 Vector4Converters.ApplyForwardConversionModifiers(destVectors, modifiers);
             }
         }

From fd3d76e78e146e459f179c6c9f4bb321db3400d5 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 01:05:59 +0200
Subject: [PATCH 038/223] Inlining temporary compatibility methods
 (FromScaledVector4, ToScaledVector4)

---
 .../PixelFormats/PixelBlender{TPixel}.cs      | 36 +++++++------------
 .../PixelFormats/PixelOperations{TPixel}.cs   | 15 --------
 .../Utils/Vector4Converters.RgbaCompatible.cs |  8 +----
 .../Dithering/PaletteDitherProcessorBase.cs   |  2 +-
 .../FrameQuantizerBase{TPixel}.cs             |  2 +-
 .../PixelOperations/PixelOperationsTests.cs   | 14 +++++---
 .../TestUtilities/TestImageExtensions.cs      |  4 +--
 7 files changed, 27 insertions(+), 54 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
index 5c8e506ae1..e814984633 100644
--- a/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
@@ -112,21 +112,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                 Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
                 Span<Vector4> sourceSpan = buffer.Slice(destination.Length * 2, destination.Length);
 
-                PixelOperations<TPixel>.Instance.ToScaledVector4(
-                    configuration,
-                    background.Slice(0, background.Length),
-                    backgroundSpan);
-                PixelOperations<TPixelSrc>.Instance.ToScaledVector4(
-                    configuration,
-                    source.Slice(0, background.Length),
-                    sourceSpan);
+                ReadOnlySpan<TPixel> sourcePixels = background.Slice(0, background.Length);
+                PixelOperations<TPixel>.Instance.ToVector4(configuration, sourcePixels, backgroundSpan, PixelConversionModifiers.Scale);
+                ReadOnlySpan<TPixelSrc> sourcePixels1 = source.Slice(0, background.Length);
+                PixelOperations<TPixelSrc>.Instance.ToVector4(configuration, sourcePixels1, sourceSpan, PixelConversionModifiers.Scale);
 
                 this.BlendFunction(destinationSpan, backgroundSpan, sourceSpan, amount);
 
-                PixelOperations<TPixel>.Instance.FromScaledVector4(
-                    configuration,
-                    destinationSpan.Slice(0, background.Length),
-                    destination);
+                Span<Vector4> sourceVectors = destinationSpan.Slice(0, background.Length);
+                PixelOperations<TPixel>.Instance.FromVector4(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
             }
         }
 
@@ -161,21 +155,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                 Span<Vector4> backgroundSpan = buffer.Slice(destination.Length, destination.Length);
                 Span<Vector4> sourceSpan = buffer.Slice(destination.Length * 2, destination.Length);
 
-                PixelOperations<TPixel>.Instance.ToScaledVector4(
-                    configuration,
-                    background.Slice(0, background.Length),
-                    backgroundSpan);
-                PixelOperations<TPixelSrc>.Instance.ToScaledVector4(
-                    configuration,
-                    source.Slice(0, background.Length),
-                    sourceSpan);
+                ReadOnlySpan<TPixel> sourcePixels = background.Slice(0, background.Length);
+                PixelOperations<TPixel>.Instance.ToVector4(configuration, sourcePixels, backgroundSpan, PixelConversionModifiers.Scale);
+                ReadOnlySpan<TPixelSrc> sourcePixels1 = source.Slice(0, background.Length);
+                PixelOperations<TPixelSrc>.Instance.ToVector4(configuration, sourcePixels1, sourceSpan, PixelConversionModifiers.Scale);
 
                 this.BlendFunction(destinationSpan, backgroundSpan, sourceSpan, amount);
 
-                PixelOperations<TPixel>.Instance.FromScaledVector4(
-                    configuration,
-                    destinationSpan.Slice(0, background.Length),
-                    destination);
+                Span<Vector4> sourceVectors = destinationSpan.Slice(0, background.Length);
+                PixelOperations<TPixel>.Instance.FromVector4(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
             }
         }
     }
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index 53181e7a94..6dae22c5ad 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -41,15 +41,6 @@ namespace SixLabors.ImageSharp.PixelFormats
             Utils.Vector4Converters.Default.FromVector4(sourceVectors, destPixels, modifiers);
         }
 
-        /// <summary>
-        /// TODO: For compatibility, should be inlined!
-        /// </summary>
-        internal void FromScaledVector4(
-            Configuration configuration,
-            Span<Vector4> sourceVectors,
-            Span<TPixel> destPixels) =>
-            this.FromVector4(configuration, sourceVectors, destPixels, PixelConversionModifiers.Scale);
-
         /// <summary>
         /// Bulk version of <see cref="IPixel.FromVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
         /// TODO: Rename to DestructiveFromVector4() + add explain behavior
@@ -90,12 +81,6 @@ namespace SixLabors.ImageSharp.PixelFormats
             Span<Vector4> destVectors) =>
             this.ToVector4(configuration, sourcePixels, destVectors, PixelConversionModifiers.None);
 
-        /// <summary>
-        /// TODO: For compatibility, should be inlined!
-        /// </summary>
-        internal void ToScaledVector4(Configuration configuration, ReadOnlySpan<TPixel> sourcePixels, Span<Vector4> destVectors) =>
-            this.ToVector4(configuration, sourcePixels, destVectors, PixelConversionModifiers.Scale);
-
         /// <summary>
         /// Converts 'sourceColors.Length' pixels from 'sourceColors' into 'destinationColors'.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
index efe4dc69a6..5188a89a36 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
@@ -32,10 +32,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
 
             /// <summary>
             /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.ToVector4(SixLabors.ImageSharp.Configuration,System.ReadOnlySpan{TPixel},System.Span{System.Numerics.Vector4},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
-            /// and <see cref="PixelOperations{TPixel}.ToScaledVector4"/>
-            /// which is applicable for <see cref="Rgba32"/>-compatible pixel types where <see cref="IPixel.ToVector4"/>
-            /// returns the same scaled result as <see cref="IPixel.ToScaledVector4"/>.
-            /// The method is works by internally converting to a <see cref="Rgba32"/> therefore it's not applicable for that type!
+            /// The method works by internally converting to a <see cref="Rgba32"/> therefore it's not applicable for that type!
             /// </summary>
             [MethodImpl(InliningOptions.ShortMethod)]
             internal static void ToVector4<TPixel>(
@@ -79,9 +76,6 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
 
             /// <summary>
             /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.FromVector4(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
-            /// and <see cref="PixelOperations{TPixel}.FromScaledVector4"/>
-            /// which is applicable for <see cref="Rgba32"/>-compatible pixel types where <see cref="IPixel.ToVector4"/>
-            /// returns the same scaled result as <see cref="IPixel.ToScaledVector4"/>.
             /// The method is works by internally converting to a <see cref="Rgba32"/> therefore it's not applicable for that type!
             /// </summary>
             [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs
index 43f6c8a454..6313b74c94 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs
@@ -98,7 +98,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
             if (this.paletteVector is null)
             {
                 this.paletteVector = new Vector4[this.Palette.Length];
-                PixelOperations<TPixel>.Instance.ToScaledVector4(configuration, this.Palette, this.paletteVector);
+                PixelOperations<TPixel>.Instance.ToVector4(configuration, (ReadOnlySpan<TPixel>)this.Palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
             }
         }
     }
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
index 3b9b046a00..a70cfb6601 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             // Collect the palette. Required before the second pass runs.
             TPixel[] palette = this.GetPalette();
             this.paletteVector = new Vector4[palette.Length];
-            PixelOperations<TPixel>.Instance.ToScaledVector4(image.Configuration, palette, this.paletteVector);
+            PixelOperations<TPixel>.Instance.ToVector4(image.Configuration, (ReadOnlySpan<TPixel>)palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
             var quantizedFrame = new QuantizedFrame<TPixel>(image.MemoryAllocator, width, height, palette);
 
             if (this.Dither)
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index f51c790348..b9d3fcff5b 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -124,8 +124,11 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromScaledVector4(this.Configuration, s, d.GetSpan())
-            );
+                (s, d) =>
+                    {
+                        Span<TPixel> destPixels = d.GetSpan();
+                        Operations.FromVector4(this.Configuration, (Span<Vector4>)s, destPixels, PixelConversionModifiers.Scale);
+                    });
         }
 
         [Theory]
@@ -262,8 +265,11 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.ToScaledVector4(this.Configuration, s, d.GetSpan())
-            );
+                (s, d) =>
+                    {
+                        Span<Vector4> destVectors = d.GetSpan();
+                        Operations.ToVector4(this.Configuration, (ReadOnlySpan<TPixel>)s, destVectors, PixelConversionModifiers.Scale);
+                    });
         }
 
         [Theory]
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index 29d39596b7..ad31319bb9 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Tests
                             {
                                 Span<TPixel> pixelSpan = frame.GetPixelSpan();
 
-                                PixelOperations<TPixel>.Instance.ToScaledVector4(configuration, pixelSpan, tempSpan);
+                                PixelOperations<TPixel>.Instance.ToVector4(configuration, pixelSpan, tempSpan, PixelConversionModifiers.Scale);
 
                                 for (int i = 0; i < tempSpan.Length; i++)
                                 {
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Tests
                                     v.W = 1F;
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromScaledVector4(configuration, tempSpan, pixelSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4(configuration, tempSpan, pixelSpan, PixelConversionModifiers.Scale);
                             }
                         }
                     });

From c88f8707e92e244df51c1b4826222e91f27d4cd4 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 01:42:17 +0200
Subject: [PATCH 039/223] Optimization: omit premultiplication for Bgr24 and
 Rgb24

---
 .../PixelFormats/PixelConversionModifiers.cs  | 24 +++++++++++++
 .../Bgr24.PixelOperations.Generated.cs        |  4 +--
 .../Rgb24.PixelOperations.Generated.cs        |  4 +--
 .../Generated/_Common.ttinclude               | 16 ++++++---
 ...xelOperationsTests.Bgr24OperationsTests.cs |  1 +
 ...xelOperationsTests.Rgb24OperationsTests.cs |  1 +
 .../PixelOperations/PixelOperationsTests.cs   | 34 +++++++++++++++----
 7 files changed, 69 insertions(+), 15 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
index 536a23061a..d66dbb57a1 100644
--- a/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
+++ b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
@@ -3,14 +3,38 @@
 
 using System;
 
+using SixLabors.ImageSharp.ColorSpaces.Companding;
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
+    /// <summary>
+    /// Flags responsible to select additional operations which could be effitiently applied in
+    /// <see cref="PixelOperations{TPixel}.ToVector4(SixLabors.ImageSharp.Configuration,System.ReadOnlySpan{TPixel},System.Span{System.Numerics.Vector4},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
+    /// or
+    /// <see cref="PixelOperations{TPixel}.FromVector4(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
+    /// knowing the pixel type.
+    /// </summary>
     [Flags]
     internal enum PixelConversionModifiers
     {
+        /// <summary>
+        /// No special operation is selected
+        /// </summary>
         None = 0,
+
+        /// <summary>
+        /// Select <see cref="IPixel.ToScaledVector4"/> <see cref="IPixel.FromScaledVector4"/> instead the standard (non scaled) variants.
+        /// </summary>
         Scale = 1 << 0,
+
+        /// <summary>
+        /// Enable alpha premultiplication / unpremultiplication
+        /// </summary>
         Premultiply = 1 << 1,
+
+        /// <summary>
+        /// Enable SRGB companding (defined in <see cref="SRgbCompanding"/>).
+        /// </summary>
         SRgbCompand = 1 << 2,
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index a9eca8994c..92925898b6 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Bgr24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
 
             /// <inheritdoc />
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index 1648f53416..6de8c92bcf 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -44,13 +44,13 @@ namespace SixLabors.ImageSharp.PixelFormats
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<Rgb24> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
 
             /// <inheritdoc />
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
index 6286eaf72c..584615532d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
@@ -22,6 +22,7 @@ using System.Runtime.InteropServices;
     // Types with Rgba32-combatible to/from Vector4 conversion
     static readonly string[] Rgba32CompatibleTypes = { "Argb32", "Bgra32", "Rgb24", "Bgr24" };
 
+
     void GenerateDefaultSelfConversionMethods(string pixelType)
     {
 #>
@@ -107,19 +108,24 @@ using System.Runtime.InteropServices;
 <#+
     }
 
-    void GenerateRgba32CompatibleVector4ConversionMethods(string pixelType)
+    void GenerateRgba32CompatibleVector4ConversionMethods(string pixelType, bool hasAlpha)
     {
+           string removeTheseModifiers = "PixelConversionModifiers.Scale";
+           if (!hasAlpha)
+           {
+               removeTheseModifiers += " | PixelConversionModifiers.Premultiply";
+           }
 #>
             /// <inheritdoc />
             internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(<#=removeTheseModifiers#>));
             }
 
             /// <inheritdoc />
             internal override void ToVector4(Configuration configuration, ReadOnlySpan<<#=pixelType#>> sourcePixels, Span<Vector4> destVectors, PixelConversionModifiers modifiers)
             {
-                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(PixelConversionModifiers.Scale));
+                Vector4Converters.RgbaCompatible.ToVector4(configuration, this, sourcePixels, destVectors, modifiers.Remove(<#=removeTheseModifiers#>));
             }
 <#+
     }
@@ -130,7 +136,7 @@ using System.Runtime.InteropServices;
 
         if (Rgba32CompatibleTypes.Contains(pixelType))
         {
-            GenerateRgba32CompatibleVector4ConversionMethods(pixelType);
+            GenerateRgba32CompatibleVector4ConversionMethods(pixelType, pixelType.EndsWith("32"));
         }
 
         var matching32BitTypes = Optimized32BitTypes.Contains(pixelType) ?
@@ -151,4 +157,4 @@ using System.Runtime.InteropServices;
             GenerateDefaultConvertToMethod(pixelType, destPixelType);
         }
     }
-#>
\ No newline at end of file
+#>
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgr24OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgr24OperationsTests.cs
index 323d3914cf..afcec79385 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgr24OperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgr24OperationsTests.cs
@@ -15,6 +15,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             public Bgr24OperationsTests(ITestOutputHelper output)
                 : base(output)
             {
+                this.HasAlpha = false;
             }
 
             [Fact]
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
index fa51c2278b..1c7d312d30 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
@@ -14,6 +14,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             public Rgb24OperationsTests(ITestOutputHelper output)
                 : base(output)
             {
+                this.HasAlpha = false;
             }
 
             [Fact]
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index b9d3fcff5b..659da47a7e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -33,6 +33,8 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
                 null;
 #endif
 
+        protected bool HasAlpha { get; set; } = true;
+
         protected PixelOperationsTests(ITestOutputHelper output)
             : base(output)
         {
@@ -165,12 +167,18 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
         {
             void sourceAction(ref Vector4 v)
             {
-                Vector4Utils.Premultiply(ref v);
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.Premultiply(ref v);
+                }
             }
 
             void expectedAction(ref Vector4 v)
             {
-                Vector4Utils.UnPremultiply(ref v);
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.UnPremultiply(ref v);
+                }
             }
 
             Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
@@ -189,12 +197,18 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
         {
             void sourceAction(ref Vector4 v)
             {
-                Vector4Utils.Premultiply(ref v);
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.Premultiply(ref v);
+                }
             }
 
             void expectedAction(ref Vector4 v)
             {
-                Vector4Utils.UnPremultiply(ref v);
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.UnPremultiply(ref v);
+                }
             }
 
             Vector4[] source = CreateVector4TestData(count, (ref Vector4 v) => sourceAction(ref v));
@@ -218,12 +232,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             void sourceAction(ref Vector4 v)
             {
                 SRgbCompanding.Expand(ref v);
-                Vector4Utils.Premultiply(ref v);
+
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.Premultiply(ref v);
+                }
             }
 
             void expectedAction(ref Vector4 v)
             {
-                Vector4Utils.UnPremultiply(ref v);
+                if (this.HasAlpha)
+                {
+                    Vector4Utils.UnPremultiply(ref v);
+                }
+                
                 SRgbCompanding.Compress(ref v);
             }
 

From 689944db2781d2c635645696f4a71cee4992abc1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 01:45:39 +0200
Subject: [PATCH 040/223] extend Resize benchmarks

---
 .../ImageSharp.Benchmarks/Samplers/Resize.cs  | 47 ++++++++++++++-----
 1 file changed, 34 insertions(+), 13 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
index 148b253281..239e2fc6fb 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
@@ -14,11 +14,12 @@ using SixLabors.ImageSharp.Processing;
 namespace SixLabors.ImageSharp.Benchmarks
 {
     [Config(typeof(Config.ShortClr))]
-    public abstract class ResizeBenchmarkBase
+    public abstract class ResizeBenchmarkBase<TPixel>
+        where TPixel : struct, IPixel<TPixel>
     {
         protected readonly Configuration Configuration = new Configuration(new JpegConfigurationModule());
 
-        private Image<Rgba32> sourceImage;
+        private Image<TPixel> sourceImage;
 
         private Bitmap sourceBitmap;
 
@@ -31,7 +32,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [GlobalSetup]
         public void Setup()
         {
-            this.sourceImage = new Image<Rgba32>(this.Configuration, this.SourceSize, this.SourceSize);
+            this.sourceImage = new Image<TPixel>(this.Configuration, this.SourceSize, this.SourceSize);
             this.sourceBitmap = new Bitmap(this.SourceSize, this.SourceSize);
         }
 
@@ -65,26 +66,29 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp, MaxDegreeOfParallelism = 1")]
         public int ImageSharp_P1() => this.RunImageSharpResize(1);
 
-        [Benchmark(Description = "ImageSharp, MaxDegreeOfParallelism = 4")]
-        public int ImageSharp_P4() => this.RunImageSharpResize(4);
+        // Parallel cases have been disabled for fast benchmark execution.
+        // Uncomment, if you are interested in parallel speedup
 
-        [Benchmark(Description = "ImageSharp, MaxDegreeOfParallelism = 8")]
-        public int ImageSharp_P8() => this.RunImageSharpResize(8);
+        //[Benchmark(Description = "ImageSharp, MaxDegreeOfParallelism = 4")]
+        //public int ImageSharp_P4() => this.RunImageSharpResize(4);
+
+        //[Benchmark(Description = "ImageSharp, MaxDegreeOfParallelism = 8")]
+        //public int ImageSharp_P8() => this.RunImageSharpResize(8);
 
         protected int RunImageSharpResize(int maxDegreeOfParallelism)
         {
             this.Configuration.MaxDegreeOfParallelism = maxDegreeOfParallelism;
 
-            using (Image<Rgba32> clone = this.sourceImage.Clone(this.ExecuteResizeOperation))
+            using (Image<TPixel> clone = this.sourceImage.Clone(this.ExecuteResizeOperation))
             {
                 return clone.Width;
             }
         }
 
-        protected abstract void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx);
+        protected abstract void ExecuteResizeOperation(IImageProcessingContext<TPixel> ctx);
     }
-    
-    public class Resize_Bicubic : ResizeBenchmarkBase
+
+    public class Resize_Bicubic_Rgba32 : ResizeBenchmarkBase<Rgba32>
     {
         protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
         {
@@ -115,7 +119,15 @@ namespace SixLabors.ImageSharp.Benchmarks
 
     }
 
-    public class Resize_BicubicCompand : ResizeBenchmarkBase
+    public class Resize_Bicubic_Bgra32 : ResizeBenchmarkBase<Bgra32>
+    {
+        protected override void ExecuteResizeOperation(IImageProcessingContext<Bgra32> ctx)
+        {
+            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
+        }
+    }
+
+    public class Resize_BicubicCompand_Rgba32 : ResizeBenchmarkBase<Rgba32>
     {
         protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
         {
@@ -144,4 +156,13 @@ namespace SixLabors.ImageSharp.Benchmarks
         //  'ImageSharp, MaxDegreeOfParallelism = 4' |    Core |       3032 |      400 |  36.21 ms | 53.802 ms | 3.0399 ms |   0.36 |     0.03 |   25300 B |
         //  'ImageSharp, MaxDegreeOfParallelism = 8' |    Core |       3032 |      400 |  26.52 ms |  2.173 ms | 0.1228 ms |   0.27 |     0.00 |   25589 B |
     }
-}
+
+    public class Resize_Bicubic_Rgb24 : ResizeBenchmarkBase<Rgb24>
+    {
+        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgb24> ctx)
+        {
+            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
+        }
+    }
+
+}
\ No newline at end of file

From 6cc51ebb8885a4a7e3c9c66cf6f720a47e68b66f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 01:56:14 +0200
Subject: [PATCH 041/223] update ResizeProcessor

---
 .../Transforms/Resize/ResizeProcessor.cs      | 102 ++++++++----------
 tests/Images/External                         |   2 +-
 2 files changed, 48 insertions(+), 56 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 189e21de7a..6904122ccf 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -9,7 +9,6 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ColorSpaces.Companding;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
@@ -216,27 +215,33 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     workingRect,
                     configuration,
                     rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
                         {
-                            for (int y = rows.Min; y < rows.Max; y++)
+                            // Y coordinates of source points
+                            Span<TPixel> sourceRow =
+                                source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
+                            Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
+
+                            for (int x = minX; x < maxX; x++)
                             {
-                                // Y coordinates of source points
-                                Span<TPixel> sourceRow =
-                                    source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
-                                Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
-
-                                for (int x = minX; x < maxX; x++)
-                                {
-                                    // X coordinates of source points
-                                    targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
-                                }
+                                // X coordinates of source points
+                                targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
                             }
-                        });
+                        }
+                    });
 
                 return;
             }
 
             int sourceHeight = source.Height;
 
+            PixelConversionModifiers conversionModifiers = PixelConversionModifiers.Premultiply;
+            if (this.Compand)
+            {
+                conversionModifiers |= PixelConversionModifiers.Scale | PixelConversionModifiers.SRgbCompand;
+            }
+
             // Interpolate the image using the calculated weights.
             // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
             // First process the columns. Since we are not using multiple threads startY and endY
@@ -251,30 +256,23 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     processColsRect,
                     configuration,
                     (rows, tempRowBuffer) =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
                         {
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(sourceX);
-                                Span<Vector4> tempRowSpan = tempRowBuffer.Span.Slice(sourceX);
-
-                                PixelOperations<TPixel>.Instance.ToVector4(configuration, sourceRow, tempRowSpan);
-                                Vector4Utils.Premultiply(tempRowSpan);
+                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(sourceX);
+                            Span<Vector4> tempRowSpan = tempRowBuffer.Span.Slice(sourceX);
 
-                                ref Vector4 firstPassBaseRef = ref firstPassPixelsTransposed.Span[y];
+                            PixelOperations<TPixel>.Instance.ToVector4(configuration, sourceRow, tempRowSpan, conversionModifiers);
 
-                                if (this.Compand)
-                                {
-                                    SRgbCompanding.Expand(tempRowSpan);
-                                }
+                            ref Vector4 firstPassBaseRef = ref firstPassPixelsTransposed.Span[y];
 
-                                for (int x = minX; x < maxX; x++)
-                                {
-                                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - startX);
-                                    Unsafe.Add(ref firstPassBaseRef, x * sourceHeight) =
-                                        kernel.Convolve(tempRowSpan);
-                                }
+                            for (int x = minX; x < maxX; x++)
+                            {
+                                ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - startX);
+                                Unsafe.Add(ref firstPassBaseRef, x * sourceHeight) = kernel.Convolve(tempRowSpan);
                             }
-                        });
+                        }
+                    });
 
                 var processRowsRect = Rectangle.FromLTRB(0, minY, width, maxY);
 
@@ -283,35 +281,29 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     processRowsRect,
                     configuration,
                     (rows, tempRowBuffer) =>
-                        {
-                            Span<Vector4> tempRowSpan = tempRowBuffer.Span;
-
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                // Ensure offsets are normalized for cropping and padding.
-                                ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
+                    {
+                        Span<Vector4> tempRowSpan = tempRowBuffer.Span;
 
-                                ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempRowSpan);
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            // Ensure offsets are normalized for cropping and padding.
+                            ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
-                                for (int x = 0; x < width; x++)
-                                {
-                                    Span<Vector4> firstPassColumn = firstPassPixelsTransposed.GetRowSpan(x).Slice(sourceY);
+                            ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempRowSpan);
 
-                                    // Destination color components
-                                    Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
-                                }
+                            for (int x = 0; x < width; x++)
+                            {
+                                Span<Vector4> firstPassColumn = firstPassPixelsTransposed.GetRowSpan(x).Slice(sourceY);
 
-                                Vector4Utils.UnPremultiply(tempRowSpan);
+                                // Destination color components
+                                Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
+                            }
 
-                                if (this.Compand)
-                                {
-                                    SRgbCompanding.Compress(tempRowSpan);
-                                }
+                            Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
 
-                                Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
-                                PixelOperations<TPixel>.Instance.FromVector4(configuration, tempRowSpan, targetRowSpan);
-                            }
-                        });
+                            PixelOperations<TPixel>.Instance.FromVector4(configuration, tempRowSpan, targetRowSpan, conversionModifiers);
+                        }
+                    });
             }
         }
 
diff --git a/tests/Images/External b/tests/Images/External
index c4098e463a..4387e56e85 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit c4098e463ab0e7128ae196b7f963369271df8fd3
+Subproject commit 4387e56e8590ee00607efe29a9babfda041621cb

From 4d9fb8bff2ff18c5fc38476fe38ff47208e24f39 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 02:06:44 +0200
Subject: [PATCH 042/223] update benchmark results

---
 .../ImageSharp.Benchmarks/Samplers/Resize.cs  | 124 +++++++++++-------
 1 file changed, 79 insertions(+), 45 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
index 239e2fc6fb..51f3a5653a 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
@@ -95,27 +95,25 @@ namespace SixLabors.ImageSharp.Benchmarks
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
 
-        // RESULTS (2018 October):
+        // RESULTS (2019 April):
         //
-        // BenchmarkDotNet=v0.10.14, OS=Windows 10.0.17134
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.648 (1803/April2018Update/Redstone4)
         // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
-        // Frequency=2742191 Hz, Resolution=364.6719 ns, Timer=TSC
-        // .NET Core SDK=2.1.403
-        //   [Host]     : .NET Core 2.1.5 (CoreCLR 4.6.26919.02, CoreFX 4.6.26919.02), 64bit RyuJIT
-        //   Job-IGUFBA : .NET Framework 4.7.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3190.0
-        //   Job-DZFERG : .NET Core 2.1.5 (CoreCLR 4.6.26919.02, CoreFX 4.6.26919.02), 64bit RyuJIT
-        //
-        //                                    Method | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Scaled | ScaledSD | Allocated |
-        // ----------------------------------------- |-------- |----------- |--------- |----------:|----------:|----------:|-------:|---------:|----------:|
-        //                             SystemDrawing |     Clr |       3032 |      400 | 101.13 ms | 18.659 ms | 1.0542 ms |   1.00 |     0.00 |       0 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' |     Clr |       3032 |      400 | 122.05 ms | 19.622 ms | 1.1087 ms |   1.21 |     0.01 |   21856 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 4' |     Clr |       3032 |      400 |  41.34 ms | 54.841 ms | 3.0986 ms |   0.41 |     0.03 |   28000 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 8' |     Clr |       3032 |      400 |  31.68 ms | 12.782 ms | 0.7222 ms |   0.31 |     0.01 |   28256 B |
-        //                                           |         |            |          |           |           |           |        |          |           |
-        //                             SystemDrawing |    Core |       3032 |      400 | 100.37 ms | 18.479 ms | 1.0441 ms |   1.00 |     0.00 |       0 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' |    Core |       3032 |      400 |  73.03 ms | 10.540 ms | 0.5955 ms |   0.73 |     0.01 |   21368 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 4' |    Core |       3032 |      400 |  22.59 ms |  4.863 ms | 0.2748 ms |   0.23 |     0.00 |   25220 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 8' |    Core |       3032 |      400 |  21.10 ms | 23.362 ms | 1.3200 ms |   0.21 |     0.01 |   25539 B |
+        // Frequency=2742192 Hz, Resolution=364.6718 ns, Timer=TSC
+        // .NET Core SDK=2.1.602
+        //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        // 
+        // IterationCount=3  LaunchCount=1  WarmupCount=3
+        // 
+        //                                    Method |  Job | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Ratio | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // ----------------------------------------- |----- |-------- |----------- |--------- |----------:|----------:|----------:|------:|------------:|------------:|------------:|--------------------:|
+        //                             SystemDrawing |  Clr |     Clr |       3032 |      400 | 118.71 ms |  4.884 ms | 0.2677 ms |  1.00 |           - |           - |           - |              2048 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |       3032 |      400 |  94.55 ms | 16.160 ms | 0.8858 ms |  0.80 |           - |           - |           - |             16384 B |
+        //                                           |      |         |            |          |           |           |           |       |             |             |             |                     |
+        //                             SystemDrawing | Core |    Core |       3032 |      400 | 118.38 ms |  2.814 ms | 0.1542 ms |  1.00 |           - |           - |           - |                96 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |       3032 |      400 |  90.28 ms |  4.679 ms | 0.2565 ms |  0.76 |           - |           - |           - |             15712 B |
 
     }
 
@@ -125,44 +123,80 @@ namespace SixLabors.ImageSharp.Benchmarks
         {
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
+
+        // RESULTS (2019 April):
+        //
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.648 (1803/April2018Update/Redstone4)
+        // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
+        // Frequency=2742192 Hz, Resolution=364.6718 ns, Timer=TSC
+        // .NET Core SDK=2.1.602
+        //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        // 
+        // IterationCount=3  LaunchCount=1  WarmupCount=3
+        // 
+        //                                    Method |  Job | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Ratio | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // ----------------------------------------- |----- |-------- |----------- |--------- |----------:|----------:|----------:|------:|------------:|------------:|------------:|--------------------:|
+        //                             SystemDrawing |  Clr |     Clr |       3032 |      400 | 119.01 ms | 18.513 ms | 1.0147 ms |  1.00 |           - |           - |           - |              1638 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |       3032 |      400 | 104.71 ms | 16.078 ms | 0.8813 ms |  0.88 |           - |           - |           - |             45056 B |
+        //                                           |      |         |            |          |           |           |           |       |             |             |             |                     |
+        //                             SystemDrawing | Core |    Core |       3032 |      400 | 121.58 ms | 50.084 ms | 2.7453 ms |  1.00 |           - |           - |           - |                96 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |       3032 |      400 |  96.96 ms |  7.899 ms | 0.4329 ms |  0.80 |           - |           - |           - |             44512 B |
     }
 
-    public class Resize_BicubicCompand_Rgba32 : ResizeBenchmarkBase<Rgba32>
+    public class Resize_Bicubic_Rgb24 : ResizeBenchmarkBase<Rgb24>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgb24> ctx)
         {
-            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic, true);
+            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
 
-        // RESULTS (2018 October):
+        // RESULTS (2019 April):
         //
-        // BenchmarkDotNet=v0.10.14, OS=Windows 10.0.17134
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.648 (1803/April2018Update/Redstone4)
         // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
-        // Frequency=2742191 Hz, Resolution=364.6719 ns, Timer=TSC
-        // .NET Core SDK=2.1.403
-        //   [Host]     : .NET Core 2.1.5 (CoreCLR 4.6.26919.02, CoreFX 4.6.26919.02), 64bit RyuJIT
-        //   Job-IGUFBA : .NET Framework 4.7.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3190.0
-        //   Job-DZFERG : .NET Core 2.1.5 (CoreCLR 4.6.26919.02, CoreFX 4.6.26919.02), 64bit RyuJIT
-        //
-        //                                    Method | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Scaled | ScaledSD | Allocated |
-        // ----------------------------------------- |-------- |----------- |--------- |----------:|----------:|----------:|-------:|---------:|----------:|
-        //                             SystemDrawing |     Clr |       3032 |      400 | 100.63 ms | 13.864 ms | 0.7833 ms |   1.00 |     0.00 |       0 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' |     Clr |       3032 |      400 | 156.83 ms | 28.631 ms | 1.6177 ms |   1.56 |     0.02 |   21856 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 4' |     Clr |       3032 |      400 |  53.43 ms | 38.493 ms | 2.1749 ms |   0.53 |     0.02 |   28512 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 8' |     Clr |       3032 |      400 |  38.47 ms | 11.969 ms | 0.6763 ms |   0.38 |     0.01 |   28000 B |
-        //                                           |         |            |          |           |           |           |        |          |           |
-        //                             SystemDrawing |    Core |       3032 |      400 |  99.87 ms | 23.459 ms | 1.3255 ms |   1.00 |     0.00 |       0 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' |    Core |       3032 |      400 | 108.19 ms | 38.562 ms | 2.1788 ms |   1.08 |     0.02 |   21368 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 4' |    Core |       3032 |      400 |  36.21 ms | 53.802 ms | 3.0399 ms |   0.36 |     0.03 |   25300 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 8' |    Core |       3032 |      400 |  26.52 ms |  2.173 ms | 0.1228 ms |   0.27 |     0.00 |   25589 B |
+        // Frequency=2742192 Hz, Resolution=364.6718 ns, Timer=TSC
+        // .NET Core SDK=2.1.602
+        //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        // 
+        //                                    Method |  Job | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Ratio | RatioSD | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // ----------------------------------------- |----- |-------- |----------- |--------- |----------:|----------:|----------:|------:|--------:|------------:|------------:|------------:|--------------------:|
+        //                             SystemDrawing |  Clr |     Clr |       3032 |      400 | 121.37 ms | 48.580 ms | 2.6628 ms |  1.00 |    0.00 |           - |           - |           - |              2048 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |       3032 |      400 |  99.36 ms | 11.356 ms | 0.6224 ms |  0.82 |    0.02 |           - |           - |           - |             45056 B |
+        //                                           |      |         |            |          |           |           |           |       |         |             |             |             |                     |
+        //                             SystemDrawing | Core |    Core |       3032 |      400 | 118.06 ms | 15.667 ms | 0.8587 ms |  1.00 |    0.00 |           - |           - |           - |                96 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |       3032 |      400 |  92.47 ms |  5.683 ms | 0.3115 ms |  0.78 |    0.01 |           - |           - |           - |             44512 B |
     }
 
-    public class Resize_Bicubic_Rgb24 : ResizeBenchmarkBase<Rgb24>
+
+    public class Resize_BicubicCompand_Rgba32 : ResizeBenchmarkBase<Rgba32>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgb24> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
         {
-            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
+            ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic, true);
         }
-    }
 
+        // RESULTS (2019 April):
+        //
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.648 (1803/April2018Update/Redstone4)
+        // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
+        // Frequency=2742192 Hz, Resolution=364.6718 ns, Timer=TSC
+        // .NET Core SDK=2.1.602
+        //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        // 
+        // IterationCount=3  LaunchCount=1  WarmupCount=3
+        // 
+        //                                    Method |  Job | Runtime | SourceSize | DestSize |     Mean |     Error |    StdDev | Ratio | RatioSD | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // ----------------------------------------- |----- |-------- |----------- |--------- |---------:|----------:|----------:|------:|--------:|------------:|------------:|------------:|--------------------:|
+        //                             SystemDrawing |  Clr |     Clr |       3032 |      400 | 120.7 ms | 68.985 ms | 3.7813 ms |  1.00 |    0.00 |           - |           - |           - |              1638 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |       3032 |      400 | 132.2 ms | 15.976 ms | 0.8757 ms |  1.10 |    0.04 |           - |           - |           - |             16384 B |
+        //                                           |      |         |            |          |          |           |           |       |         |             |             |             |                     |
+        //                             SystemDrawing | Core |    Core |       3032 |      400 | 118.3 ms |  6.899 ms | 0.3781 ms |  1.00 |    0.00 |           - |           - |           - |                96 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |       3032 |      400 | 122.4 ms | 15.069 ms | 0.8260 ms |  1.03 |    0.01 |           - |           - |           - |             15712 B |
+    }
 }
\ No newline at end of file

From 86ce62ed2cbbefc4a0f6b75cca023a0410ba0f48 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 02:14:16 +0200
Subject: [PATCH 043/223] rename FromVector4(...) to
 FromVector4Destructive(...)

---
 .../Decoder/JpegImagePostProcessor.cs          |  2 +-
 .../PixelFormats/PixelBlender{TPixel}.cs       |  4 ++--
 .../PixelFormats/PixelConversionModifiers.cs   |  4 ++--
 .../Argb32.PixelOperations.Generated.cs        |  2 +-
 .../Bgr24.PixelOperations.Generated.cs         |  2 +-
 .../Bgra32.PixelOperations.Generated.cs        |  2 +-
 .../Rgb24.PixelOperations.Generated.cs         |  2 +-
 .../Rgba32.PixelOperations.cs                  |  2 +-
 .../RgbaVector.PixelOperations.cs              |  2 +-
 .../PixelFormats/PixelOperations{TPixel}.cs    | 18 +++++++++++++-----
 .../Utils/Vector4Converters.RgbaCompatible.cs  |  2 +-
 .../Convolution/Convolution2DProcessor.cs      |  2 +-
 .../Convolution/Convolution2PassProcessor.cs   |  2 +-
 .../Convolution/ConvolutionProcessor.cs        |  2 +-
 .../Processors/Filters/FilterProcessor.cs      |  2 +-
 .../Transforms/AffineTransformProcessor.cs     |  2 +-
 .../Transforms/ProjectiveTransformProcessor.cs |  2 +-
 .../Transforms/Resize/ResizeProcessor.cs       |  2 +-
 .../Color/Bulk/FromVector4.cs                  |  4 ++--
 .../PixelBlenders/PorterDuffBulkVsPixel.cs     |  2 +-
 .../PixelOperations/PixelOperationsTests.cs    | 12 ++++++------
 .../TestUtilities/TestImageExtensions.cs       |  2 +-
 22 files changed, 42 insertions(+), 34 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
index 438749abf9..2c81908843 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
@@ -173,7 +173,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 Span<TPixel> destRow = destination.GetPixelRowSpan(yy);
 
                 // TODO: Investigate if slicing is actually necessary
-                PixelOperations<TPixel>.Instance.FromVector4(this.configuration, this.rgbaBuffer.GetSpan().Slice(0, destRow.Length), destRow);
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(this.configuration, this.rgbaBuffer.GetSpan().Slice(0, destRow.Length), destRow);
             }
         }
     }
diff --git a/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
index e814984633..d2a6fbf501 100644
--- a/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelBlender{TPixel}.cs
@@ -120,7 +120,7 @@ namespace SixLabors.ImageSharp.PixelFormats
                 this.BlendFunction(destinationSpan, backgroundSpan, sourceSpan, amount);
 
                 Span<Vector4> sourceVectors = destinationSpan.Slice(0, background.Length);
-                PixelOperations<TPixel>.Instance.FromVector4(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
             }
         }
 
@@ -163,7 +163,7 @@ namespace SixLabors.ImageSharp.PixelFormats
                 this.BlendFunction(destinationSpan, backgroundSpan, sourceSpan, amount);
 
                 Span<Vector4> sourceVectors = destinationSpan.Slice(0, background.Length);
-                PixelOperations<TPixel>.Instance.FromVector4(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, sourceVectors, destination, PixelConversionModifiers.Scale);
             }
         }
     }
diff --git a/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
index d66dbb57a1..5df5dc62bc 100644
--- a/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
+++ b/src/ImageSharp/PixelFormats/PixelConversionModifiers.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.PixelFormats
     /// Flags responsible to select additional operations which could be effitiently applied in
     /// <see cref="PixelOperations{TPixel}.ToVector4(SixLabors.ImageSharp.Configuration,System.ReadOnlySpan{TPixel},System.Span{System.Numerics.Vector4},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
     /// or
-    /// <see cref="PixelOperations{TPixel}.FromVector4(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
+    /// <see cref="PixelOperations{TPixel}.FromVector4Destructive(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
     /// knowing the pixel type.
     /// </summary>
     [Flags]
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         None = 0,
 
         /// <summary>
-        /// Select <see cref="IPixel.ToScaledVector4"/> <see cref="IPixel.FromScaledVector4"/> instead the standard (non scaled) variants.
+        /// Select <see cref="IPixel.ToScaledVector4"/> and <see cref="IPixel.FromScaledVector4"/> instead the standard (non scaled) variants.
         /// </summary>
         Scale = 1 << 0,
 
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
index c49f3f8343..4cff1f8c10 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels, PixelConversionModifiers modifiers)
+            internal override void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<Argb32> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index 92925898b6..225e4b5e01 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels, PixelConversionModifiers modifiers)
+            internal override void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgr24> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
index 73eddc235e..ce049115ea 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels, PixelConversionModifiers modifiers)
+            internal override void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<Bgra32> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale));
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index 6de8c92bcf..02a8869ecc 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels, PixelConversionModifiers modifiers)
+            internal override void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<Rgb24> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(PixelConversionModifiers.Scale | PixelConversionModifiers.Premultiply));
             }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
index aa9b82be7d..3da5d1855b 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.PixelOperations.cs
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.PixelFormats
             }
 
             /// <inheritdoc />
-            internal override void FromVector4(
+            internal override void FromVector4Destructive(
                 Configuration configuration,
                 Span<Vector4> sourceVectors,
                 Span<Rgba32> destPixels,
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index 2d52f98cb6..3112126e76 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         internal class PixelOperations : PixelOperations<RgbaVector>
         {
             /// <inheritdoc />
-            internal override void FromVector4(
+            internal override void FromVector4Destructive(
                 Configuration configuration,
                 Span<Vector4> sourceVectors,
                 Span<RgbaVector> destinationColors,
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index 6dae22c5ad..d009822e80 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -24,13 +24,17 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <summary>
         /// Bulk version of <see cref="IPixel.FromVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
-        /// TODO: Rename to DestructiveFromVector4() + add explain behavior
+        /// The method is DESTRUCTIVE altering the contents of <paramref name="sourceVectors"/>.
         /// </summary>
+        /// <remarks>
+        /// The destructive behavior is a design choice for performance reasons.
+        /// In a typical use case the contents of <paramref name="sourceVectors"/> are abandoned after the conversion.
+        /// </remarks>
         /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
         /// <param name="sourceVectors">The <see cref="Span{T}"/> to the source vectors.</param>
         /// <param name="destPixels">The <see cref="Span{T}"/> to the destination colors.</param>
         /// <param name="modifiers">The <see cref="PixelConversionModifiers"/> to apply during the conversion</param>
-        internal virtual void FromVector4(
+        internal virtual void FromVector4Destructive(
             Configuration configuration,
             Span<Vector4> sourceVectors,
             Span<TPixel> destPixels,
@@ -43,13 +47,17 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <summary>
         /// Bulk version of <see cref="IPixel.FromVector4"/> converting 'sourceVectors.Length' pixels into 'destinationColors'.
-        /// TODO: Rename to DestructiveFromVector4() + add explain behavior
+        /// The method is DESTRUCTIVE altering the contents of <paramref name="sourceVectors"/>.
         /// </summary>
+        /// <remarks>
+        /// The destructive behavior is a design choice for performance reasons.
+        /// In a typical use case the contents of <paramref name="sourceVectors"/> are abandoned after the conversion.
+        /// </remarks>
         /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
         /// <param name="sourceVectors">The <see cref="Span{T}"/> to the source vectors.</param>
         /// <param name="destPixels">The <see cref="Span{T}"/> to the destination colors.</param>
-        internal void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<TPixel> destPixels) =>
-            this.FromVector4(configuration, sourceVectors, destPixels, PixelConversionModifiers.None);
+        internal void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<TPixel> destPixels) =>
+            this.FromVector4Destructive(configuration, sourceVectors, destPixels, PixelConversionModifiers.None);
 
         /// <summary>
         /// Bulk version of <see cref="IPixel.ToVector4()"/> converting 'sourceColors.Length' pixels into 'destinationVectors'.
diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
index 5188a89a36..fe8d7dec3b 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.RgbaCompatible.cs
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.PixelFormats.Utils
             }
 
             /// <summary>
-            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.FromVector4(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
+            /// Provides an efficient default implementation for <see cref="PixelOperations{TPixel}.FromVector4Destructive(SixLabors.ImageSharp.Configuration,System.Span{System.Numerics.Vector4},System.Span{TPixel},SixLabors.ImageSharp.PixelFormats.PixelConversionModifiers)"/>
             /// The method is works by internally converting to a <see cref="Rgba32"/> therefore it's not applicable for that type!
             /// </summary>
             [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
index bd1419e4bb..341a26ae84 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
@@ -82,7 +82,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                                     DenseMatrixUtils.Convolve2D(in matrixY, in matrixX, source.PixelBuffer, vectorSpan, y, x, maxY, maxX, startX);
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
                             }
                         });
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
index 05007c3706..9de4673289 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
@@ -100,7 +100,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                                 DenseMatrixUtils.Convolve(in matrix, sourcePixels, vectorSpan, y, x, maxY, maxX, startX);
                             }
 
-                            PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
                         }
                     });
         }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
index 8ef64bdacc..7e003cb03e 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
@@ -66,7 +66,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                                     DenseMatrixUtils.Convolve(in matrix, source.PixelBuffer, vectorSpan, y, x, maxY, maxX, startX);
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
                             }
                         });
 
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index d6a32d8899..dbd8433410 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
 
                             Vector4Utils.Transform(vectorSpan, ref matrix);
 
-                            PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan, rowSpan);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, rowSpan);
                         }
                     });
         }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
index 5a3b5943b7..0f71c732dd 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
@@ -129,7 +129,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                 kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
                             }
 
-                            PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan, targetRowSpan);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
                         }
                     });
             }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
index 0b5627e19b..8a5d7563f4 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
@@ -128,7 +128,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                 kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
                             }
 
-                            PixelOperations<TPixel>.Instance.FromVector4(configuration, vectorSpan, targetRowSpan);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
                         }
                     });
             }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 6904122ccf..2c186a276b 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -301,7 +301,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                             Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
 
-                            PixelOperations<TPixel>.Instance.FromVector4(configuration, tempRowSpan, targetRowSpan, conversionModifiers);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempRowSpan, targetRowSpan, conversionModifiers);
                         }
                     });
             }
diff --git a/tests/ImageSharp.Benchmarks/Color/Bulk/FromVector4.cs b/tests/ImageSharp.Benchmarks/Color/Bulk/FromVector4.cs
index 2b9573ed73..8b2d08e66a 100644
--- a/tests/ImageSharp.Benchmarks/Color/Bulk/FromVector4.cs
+++ b/tests/ImageSharp.Benchmarks/Color/Bulk/FromVector4.cs
@@ -61,13 +61,13 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
         [Benchmark]
         public void PixelOperations_Base()
         {
-            new PixelOperations<TPixel>().FromVector4(this.Configuration, this.source.GetSpan(), this.destination.GetSpan());
+            new PixelOperations<TPixel>().FromVector4Destructive(this.Configuration, this.source.GetSpan(), this.destination.GetSpan());
         }
 
         [Benchmark]
         public void PixelOperations_Specialized()
         {
-            PixelOperations<TPixel>.Instance.FromVector4(this.Configuration, this.source.GetSpan(), this.destination.GetSpan());
+            PixelOperations<TPixel>.Instance.FromVector4Destructive(this.Configuration, this.source.GetSpan(), this.destination.GetSpan());
         }
     }
 
diff --git a/tests/ImageSharp.Benchmarks/PixelBlenders/PorterDuffBulkVsPixel.cs b/tests/ImageSharp.Benchmarks/PixelBlenders/PorterDuffBulkVsPixel.cs
index cdd56fa074..ce4e16c446 100644
--- a/tests/ImageSharp.Benchmarks/PixelBlenders/PorterDuffBulkVsPixel.cs
+++ b/tests/ImageSharp.Benchmarks/PixelBlenders/PorterDuffBulkVsPixel.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                     destinationSpan[i] = PorterDuffFunctions.NormalSrcOver(backgroundSpan[i], sourceSpan[i], amount[i]);
                 }
 
-                PixelOperations<TPixel>.Instance.FromVector4(this.Configuration, destinationSpan, destination);
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(this.Configuration, destinationSpan, destination);
             }
         }
 
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index 659da47a7e..d9ae9131ff 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -112,7 +112,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(this.Configuration, s, d.GetSpan())
+                (s, d) => Operations.FromVector4Destructive(this.Configuration, s, d.GetSpan())
             );
         }
 
@@ -129,7 +129,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
                 (s, d) =>
                     {
                         Span<TPixel> destPixels = d.GetSpan();
-                        Operations.FromVector4(this.Configuration, (Span<Vector4>)s, destPixels, PixelConversionModifiers.Scale);
+                        Operations.FromVector4Destructive(this.Configuration, (Span<Vector4>)s, destPixels, PixelConversionModifiers.Scale);
                     });
         }
 
@@ -153,7 +153,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(
+                (s, d) => Operations.FromVector4Destructive(
                     this.Configuration,
                     s,
                     d.GetSpan(),
@@ -187,7 +187,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.Premultiply)
+                (s, d) => Operations.FromVector4Destructive(this.Configuration, s, d.GetSpan(), PixelConversionModifiers.Premultiply)
             );
         }
 
@@ -217,7 +217,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(
+                (s, d) => Operations.FromVector4Destructive(
                     this.Configuration,
                     s,
                     d.GetSpan(),
@@ -255,7 +255,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             TestOperation(
                 source,
                 expected,
-                (s, d) => Operations.FromVector4(
+                (s, d) => Operations.FromVector4Destructive(
                     this.Configuration,
                     s,
                     d.GetSpan(),
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index ad31319bb9..6ca3ed6f9f 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Tests
                                     v.W = 1F;
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4(configuration, tempSpan, pixelSpan, PixelConversionModifiers.Scale);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempSpan, pixelSpan, PixelConversionModifiers.Scale);
                             }
                         }
                     });

From af0a6da3aecc9135ededf587a56ef9af5091b754 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 1 Apr 2019 02:20:38 +0200
Subject: [PATCH 044/223] pull back the submodule reference with a few
 revisions

---
 tests/Images/External | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/Images/External b/tests/Images/External
index 4387e56e85..9d71985545 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 4387e56e8590ee00607efe29a9babfda041621cb
+Subproject commit 9d71985545bb827270ca34af3f78e4c220560ef1

From a834a7ce308a91e8282b9ea36028cd91c22bdb21 Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Mon, 1 Apr 2019 23:16:04 -0500
Subject: [PATCH 045/223] Nits (#870)

* Format conversion models

* Format color spaces

* Add missing periods

* Replace Endianness enum with isBigEndian

* Seal DoubleBufferedStreamReader

* Remove unused namespaces

* Simplify variable names

* Remove unused namespace

* Format Block8x8F

* Use MathF

* Simplify exception when an encoder is not found

* Format ICC models

* Simplify excption messages in ExifValue (reduces IL size)

* Add missing periods to documentation.

* Format ImageProperty

* Format BmpImageFormatDetector

* Seal LocalFileSystem

* Seal JpegColorConverter implementations

* Add missing periods to jpeg documentation

* Format ValueSize

* Fix stylecop violation

* Revert "Simplify excption messages in ExifValue (reduces IL size)"

This reverts commit d22f2a679f4d9b1d5c3e41a56d1a7ea8e895f6c7.
---
 .../Advanced/AdvancedImageExtensions.cs       |  6 +-
 src/ImageSharp/Advanced/IPixelSource.cs       |  1 -
 src/ImageSharp/ColorSpaces/CieLch.cs          |  6 +-
 src/ImageSharp/ColorSpaces/CieXyz.cs          |  2 +-
 src/ImageSharp/ColorSpaces/Cmyk.cs            |  2 +-
 .../ColorSpaces/Companding/SRgbCompanding.cs  |  2 +-
 .../Conversion/ColorSpaceConverter.CieLab.cs  | 47 +++++-----
 .../Conversion/ColorSpaceConverter.CieLch.cs  | 48 +++++-----
 .../ColorSpaceConverter.CieLchuv.cs           | 50 +++++-----
 .../Conversion/ColorSpaceConverter.CieLuv.cs  | 54 +++++------
 .../Conversion/ColorSpaceConverter.CieXyz.cs  | 57 +++++-------
 .../Conversion/ColorSpaceConverter.Cmyk.cs    | 42 ++++-----
 .../Conversion/ColorSpaceConverter.Hsl.cs     | 36 ++++----
 .../Conversion/ColorSpaceConverter.Hsv.cs     |  2 +-
 .../ColorSpaceConverter.HunterLab.cs          | 68 +++++++-------
 .../ColorSpaceConverter.LinearRgb.cs          | 92 +++++++++----------
 .../Conversion/ColorSpaceConverter.YCbCr.cs   | 54 +++++------
 .../Conversion/VonKriesChromaticAdaptation.cs |  4 +-
 src/ImageSharp/ColorSpaces/HunterLab.cs       |  9 +-
 src/ImageSharp/ColorSpaces/Illuminants.cs     |  6 +-
 src/ImageSharp/ColorSpaces/Rgb.cs             |  8 +-
 .../ColorSpaces/RgbWorkingSpaces.cs           |  3 +-
 .../Common/Extensions/EnumerableExtensions.cs |  4 +-
 src/ImageSharp/Common/Tuples/Octet.cs         |  2 +-
 .../Formats/Bmp/BmpImageFormatDetector.cs     |  8 +-
 .../Formats/Gif/IGifDecoderOptions.cs         |  2 +-
 .../Jpeg/Components/Block8x8F.Generated.cs    |  4 +-
 .../Jpeg/Components/Block8x8F.Generated.tt    |  4 +-
 .../Formats/Jpeg/Components/Block8x8F.cs      | 24 ++---
 .../Jpeg/Components/Decoder/AdobeMarker.cs    |  4 +-
 .../JpegColorConverter.FromCmyk.cs            |  2 +-
 .../JpegColorConverter.FromGrayScale.cs       |  2 +-
 .../JpegColorConverter.FromRgb.cs             |  2 +-
 .../JpegColorConverter.FromYCbCrBasic.cs      |  2 +-
 .../JpegColorConverter.FromYCbCrSimd.cs       |  2 +-
 .../JpegColorConverter.FromYCbCrSimdAvx2.cs   |  2 +-
 .../JpegColorConverter.FromYccK.cs            |  2 +-
 .../ColorConverters/JpegColorConverter.cs     |  4 +-
 .../Jpeg/Components/Decoder/FastACTable.cs    |  2 +-
 .../Jpeg/Components/Decoder/HuffmanTable.cs   |  8 +-
 .../Jpeg/Components/Decoder/JFifMarker.cs     | 18 ++--
 .../Decoder/JpegBlockPostProcessor.cs         | 14 +--
 .../Jpeg/Components/Decoder/JpegColorSpace.cs |  2 +-
 .../Jpeg/Components/Decoder/JpegComponent.cs  |  2 +-
 .../Decoder/JpegComponentPostProcessor.cs     |  2 +-
 .../Jpeg/Components/Decoder/JpegFrame.cs      | 28 +++---
 .../Components/Decoder/ProfileResolver.cs     | 14 +--
 src/ImageSharp/IImageInfo.cs                  |  2 +-
 .../IO/DoubleBufferedStreamReader.cs          |  8 +-
 src/ImageSharp/IO/Endianness.cs               | 21 -----
 src/ImageSharp/IO/LocalFileSystem.cs          |  2 +-
 src/ImageSharp/Image.FromBytes.cs             | 15 ++-
 src/ImageSharp/Image.WrapMemory.cs            | 47 +++++-----
 src/ImageSharp/ImageExtensions.Internal.cs    |  1 -
 src/ImageSharp/ImageExtensions.cs             |  8 +-
 src/ImageSharp/Memory/RowInterval.cs          | 11 +--
 src/ImageSharp/MetaData/ImageProperty.cs      |  5 +-
 .../MetaData/Profiles/Exif/ExifReader.cs      | 32 +++----
 .../ICC/Various/IccColorantTableEntry.cs      | 13 +--
 .../ICC/Various/IccLocalizedString.cs         |  5 +-
 .../Profiles/ICC/Various/IccProfileId.cs      | 25 ++---
 .../ICC/Various/IccScreeningChannel.cs        |  9 +-
 .../Profiles/ICC/Various/IccTagTableEntry.cs  | 21 ++---
 .../PixelImplementations/NormalizedByte4.cs   |  8 +-
 src/ImageSharp/Primitives/LongRational.cs     |  2 +-
 src/ImageSharp/Primitives/ValueSize.cs        | 22 ++---
 66 files changed, 465 insertions(+), 551 deletions(-)
 delete mode 100644 src/ImageSharp/IO/Endianness.cs

diff --git a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
index 63ccea4e66..bdcb4c10f1 100644
--- a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
+++ b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Advanced
         /// Gets the configuration for the image.
         /// </summary>
         /// <typeparam name="TPixel">The Pixel format.</typeparam>
-        /// <param name="source">The source image</param>
+        /// <param name="source">The source image.</param>
         /// <returns>Returns the configuration.</returns>
         public static Configuration GetConfiguration<TPixel>(this Image<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
@@ -150,7 +150,7 @@ namespace SixLabors.ImageSharp.Advanced
         /// <summary>
         /// Gets the <see cref="MemoryAllocator"/> assigned to 'source'.
         /// </summary>
-        /// <param name="source">The source image</param>
+        /// <param name="source">The source image.</param>
         /// <returns>Returns the configuration.</returns>
         internal static MemoryAllocator GetMemoryAllocator(this IConfigurable source)
             => GetConfiguration(source).MemoryAllocator;
@@ -185,7 +185,7 @@ namespace SixLabors.ImageSharp.Advanced
         /// <param name="source">The source.</param>
         /// <param name="row">The row.</param>
         /// <returns>
-        /// The span returned from Pixel source
+        /// The span returned from Pixel source.
         /// </returns>
         private static Span<TPixel> GetSpan<TPixel>(Buffer2D<TPixel> source, int row)
             where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/Advanced/IPixelSource.cs b/src/ImageSharp/Advanced/IPixelSource.cs
index 19616d7427..a321e877ba 100644
--- a/src/ImageSharp/Advanced/IPixelSource.cs
+++ b/src/ImageSharp/Advanced/IPixelSource.cs
@@ -3,7 +3,6 @@
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.Advanced
 {
diff --git a/src/ImageSharp/ColorSpaces/CieLch.cs b/src/ImageSharp/ColorSpaces/CieLch.cs
index 074bc1516b..99d4c09e97 100644
--- a/src/ImageSharp/ColorSpaces/CieLch.cs
+++ b/src/ImageSharp/ColorSpaces/CieLch.cs
@@ -13,15 +13,15 @@ namespace SixLabors.ImageSharp.ColorSpaces
     /// </summary>
     public readonly struct CieLch : IEquatable<CieLch>
     {
-        private static readonly Vector3 Min = new Vector3(0, -200, 0);
-        private static readonly Vector3 Max = new Vector3(100, 200, 360);
-
         /// <summary>
         /// D50 standard illuminant.
         /// Used when reference white is not specified explicitly.
         /// </summary>
         public static readonly CieXyz DefaultWhitePoint = Illuminants.D50;
 
+        private static readonly Vector3 Min = new Vector3(0, -200, 0);
+        private static readonly Vector3 Max = new Vector3(100, 200, 360);
+
         /// <summary>
         /// Gets the lightness dimension.
         /// <remarks>A value ranging between 0 (black), 100 (diffuse white) or higher (specular white).</remarks>
diff --git a/src/ImageSharp/ColorSpaces/CieXyz.cs b/src/ImageSharp/ColorSpaces/CieXyz.cs
index 30521476e5..6c5adcb219 100644
--- a/src/ImageSharp/ColorSpaces/CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/CieXyz.cs
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         public readonly float Y;
 
         /// <summary>
-        /// Gets the Z component. Quasi-equal to blue stimulation, or the S cone response
+        /// Gets the Z component. Quasi-equal to blue stimulation, or the S cone response.
         /// <remarks>A value usually ranging between 0 and 1.</remarks>
         /// </summary>
         public readonly float Z;
diff --git a/src/ImageSharp/ColorSpaces/Cmyk.cs b/src/ImageSharp/ColorSpaces/Cmyk.cs
index 04901126c1..c2331c3798 100644
--- a/src/ImageSharp/ColorSpaces/Cmyk.cs
+++ b/src/ImageSharp/ColorSpaces/Cmyk.cs
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         public static bool operator ==(Cmyk left, Cmyk right) => left.Equals(right);
 
         /// <summary>
-        /// Compares two <see cref="Cmyk"/> objects for inequality
+        /// Compares two <see cref="Cmyk"/> objects for inequality.
         /// </summary>
         /// <param name="left">The <see cref="Cmyk"/> on the left side of the operand.</param>
         /// <param name="right">The <see cref="Cmyk"/> on the right side of the operand.</param>
diff --git a/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs b/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
index bbd454fbe8..cc30c3632d 100644
--- a/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/SRgbCompanding.cs
@@ -9,7 +9,7 @@ using System.Runtime.InteropServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Companding
 {
     /// <summary>
-    /// Implements sRGB companding
+    /// Implements sRGB companding.
     /// </summary>
     /// <remarks>
     /// For more info see:
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
index 3c197673d3..bfabbb21d5 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly CieLchToCieLabConverter CieLchToCieLabConverter = new CieLchToCieLabConverter();
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -28,12 +28,11 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
             // Conversion (perserving white point)
             CieLab unadapted = CieLchToCieLabConverter.Convert(color);
 
-            // Adaptation
             return this.Adapt(unadapted);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -54,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -66,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -87,7 +86,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -99,7 +98,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -120,7 +119,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -132,7 +131,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -159,10 +158,8 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// <returns>The <see cref="CieLab"/></returns>
         public CieLab ToCieLab(in CieXyz color)
         {
-            // Adaptation
             CieXyz adapted = this.Adapt(color, this.whitePoint, this.targetLabWhitePoint);
 
-            // Conversion
             return this.cieXyzToCieLabConverter.Convert(adapted);
         }
 
@@ -199,7 +196,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -220,7 +217,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -232,7 +229,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -253,7 +250,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -264,7 +261,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -285,7 +282,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -297,7 +294,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -318,7 +315,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -330,7 +327,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -351,7 +348,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -363,7 +360,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -384,7 +381,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="CieLab"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="CieLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -396,7 +393,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -429,7 +426,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLab"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
index 0a8607e3bc..3810736197 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -88,7 +88,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -100,7 +100,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -121,7 +121,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -133,7 +133,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -166,7 +166,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -187,7 +187,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -198,7 +198,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -231,7 +231,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -252,7 +252,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -264,7 +264,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -285,7 +285,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -297,7 +297,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -318,7 +318,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -330,7 +330,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -351,7 +351,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -363,7 +363,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -384,7 +384,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -396,7 +396,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -417,7 +417,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLch"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLch"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
@@ -429,7 +429,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLch"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLch"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
index 3a779ee722..6ca40af035 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -86,21 +86,19 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
         public CieLchuv ToCieLchuv(in CieLuv color)
         {
-            // Adaptation
             CieLuv adapted = this.Adapt(color);
 
-            // Conversion
             return CieLuvToCieLchuvConverter.Convert(adapted);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -121,7 +119,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -133,7 +131,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -154,7 +152,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -166,7 +164,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -187,7 +185,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -199,7 +197,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -220,7 +218,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -253,7 +251,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -265,7 +263,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -286,7 +284,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -298,7 +296,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -319,7 +317,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -331,7 +329,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -352,7 +350,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -364,7 +362,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -385,7 +383,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -397,7 +395,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -418,7 +416,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLchuv"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
@@ -429,7 +427,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLchuv"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLchuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
index 90eb8e34d7..316b35f37a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly CieLchuvToCieLuvConverter CieLchuvToCieLuvConverter = new CieLchuvToCieLuvConverter();
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -81,7 +81,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
@@ -95,7 +95,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -116,7 +116,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -127,7 +127,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -148,7 +148,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -162,7 +162,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -183,7 +183,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -194,7 +194,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -226,7 +226,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -247,7 +247,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -258,7 +258,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -279,7 +279,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -290,7 +290,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -311,7 +311,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -322,7 +322,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -343,7 +343,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -354,7 +354,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -375,7 +375,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -386,7 +386,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -407,7 +407,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLuv"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="CieLuv"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
@@ -418,10 +418,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLuv"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="CieLuv"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<YCbCr> source, Span<CieLuv> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
index fada6d9c59..2cc8437bba 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private LinearRgbToCieXyzConverter linearRgbToCieXyzConverter;
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -94,7 +94,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -108,7 +108,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -143,7 +143,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -164,7 +164,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -175,7 +175,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -196,20 +196,19 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
         public CieXyz ToCieXyz(in Cmyk color)
         {
-            // Conversion
             var rgb = this.ToRgb(color);
 
             return this.ToCieXyz(rgb);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -230,23 +229,22 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
         public CieXyz ToCieXyz(in Hsl color)
         {
-            // Conversion
             var rgb = this.ToRgb(color);
 
             return this.ToCieXyz(rgb);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="CieXyz"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Hsl> source, Span<CieXyz> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -264,7 +262,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -277,7 +275,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -298,21 +296,19 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
         public CieXyz ToCieXyz(in HunterLab color)
         {
-            // Conversion
             CieXyz unadapted = HunterLabToCieXyzConverter.Convert(color);
 
-            // Adaptation
             return this.Adapt(unadapted, color.WhitePoint);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -333,7 +329,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
@@ -343,15 +339,14 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
             LinearRgbToCieXyzConverter converter = this.GetLinearRgbToCieXyzConverter(color.WorkingSpace);
             CieXyz unadapted = converter.Convert(color);
 
-            // Adaptation
             return this.Adapt(unadapted, color.WorkingSpace.WhitePoint);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="CieXyz"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<LinearRgb> source, Span<CieXyz> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -369,18 +364,17 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="CieXyz"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
         public CieXyz ToCieXyz(in Lms color)
         {
-            // Conversion
             return this.cieXyzAndLmsConverter.Convert(color);
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieXyz"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="CieXyz"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -440,7 +434,6 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// <returns>The <see cref="CieXyz"/></returns>
         public CieXyz ToCieXyz(in YCbCr color)
         {
-            // Conversion
             var rgb = this.ToRgb(color);
 
             return this.ToCieXyz(rgb);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
index b798516359..00e20e25b4 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly CmykAndRgbConverter CmykAndRgbConverter = new CmykAndRgbConverter();
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -161,7 +161,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -182,7 +182,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -215,7 +215,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -227,7 +227,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -248,7 +248,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -260,7 +260,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -281,7 +281,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -293,7 +293,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -314,7 +314,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -326,7 +326,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -347,7 +347,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -359,9 +359,9 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="Cmyk"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
+        /// <param name="source">The span to the source colors,</param>
         /// <param name="destination">The span to the destination colors</param>
         public void Convert(ReadOnlySpan<Lms> source, Span<Cmyk> destination)
         {
@@ -380,7 +380,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -408,7 +408,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="Cmyk"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
@@ -420,7 +420,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="Cmyk"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="Cmyk"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
index a7080b9749..76175f1cba 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly HslAndRgbConverter HslAndRgbConverter = new HslAndRgbConverter();
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -95,7 +95,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -116,7 +116,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -128,7 +128,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -281,7 +281,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -293,7 +293,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -314,7 +314,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -326,7 +326,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -347,7 +347,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -359,7 +359,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -387,7 +387,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         public Hsl ToHsl(in Rgb color) => HslAndRgbConverter.Convert(color);
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -408,7 +408,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="Hsl"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="Hsl"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
@@ -420,7 +420,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="Hsl"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="Hsl"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
index a2121203c1..e64beb3e49 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
@@ -263,7 +263,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="Hsv"/>
         /// </summary>
         /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Hsl> source, Span<Hsv> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
index e5996c238e..91e5549ac8 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
@@ -13,10 +13,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
     public partial class ColorSpaceConverter
     {
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="HunterLab"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLab> source, Span<HunterLab> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -34,10 +34,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="HunterLab"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLch> source, Span<HunterLab> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -97,10 +97,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="HunterLab"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieXyy> source, Span<HunterLab> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -118,10 +118,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="HunterLab"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieXyz> source, Span<HunterLab> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -139,7 +139,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -160,10 +160,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Hsl> source, Span<HunterLab> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -181,7 +181,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -223,7 +223,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -244,7 +244,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -265,7 +265,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="HunterLab"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -286,7 +286,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -297,7 +297,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -308,7 +308,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -319,7 +319,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -330,7 +330,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -341,21 +341,19 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
         public HunterLab ToHunterLab(in CieXyz color)
         {
-            // Adaptation
             CieXyz adapted = this.Adapt(color, this.whitePoint, this.targetHunterLabWhitePoint);
 
-            // Conversion
             return this.cieXyzToHunterLabConverter.Convert(adapted);
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -366,7 +364,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -377,7 +375,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -388,7 +386,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -399,7 +397,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
@@ -421,7 +419,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="HunterLab"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="HunterLab"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
index eef626be2f..4be3f0079d 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
@@ -17,10 +17,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly RgbToLinearRgbConverter RgbToLinearRgbConverter = new RgbToLinearRgbConverter();
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLab> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -38,10 +38,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLch> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -59,10 +59,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieLchuv"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLchuv> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -80,10 +80,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLuv> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -101,10 +101,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieXyy"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieXyy> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -122,10 +122,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieXyz> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -143,10 +143,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Cmyk> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -164,10 +164,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Hsl> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -185,10 +185,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Hsv> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -206,10 +206,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<HunterLab> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -227,10 +227,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="LinearRgb"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<Lms> source, Span<LinearRgb> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -248,7 +248,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -269,7 +269,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="LinearRgb"/>
+        /// Performs the bulk conversion from <see cref="YCbCr"/> into <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -290,7 +290,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -301,7 +301,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -312,7 +312,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLchuv"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="CieLchuv"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -323,7 +323,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -345,7 +345,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -359,7 +359,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -370,7 +370,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -381,7 +381,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -392,7 +392,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -403,7 +403,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
@@ -425,7 +425,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="YCbCr"/> into a <see cref="LinearRgb"/>
+        /// Converts a <see cref="YCbCr"/> into a <see cref="LinearRgb"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
index 5780f4f545..68cd34bf2e 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
@@ -17,10 +17,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private static readonly YCbCrAndRgbConverter YCbCrAndRgbConverter = new YCbCrAndRgbConverter();
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="CieLab"/> into <see cref="YCbCr"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLab> source, Span<YCbCr> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -38,10 +38,10 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="CieLch"/> into <see cref="YCbCr"/>.
         /// </summary>
-        /// <param name="source">The span to the source colors</param>
-        /// <param name="destination">The span to the destination colors</param>
+        /// <param name="source">The span to the source colors.</param>
+        /// <param name="destination">The span to the destination colors.</param>
         public void Convert(ReadOnlySpan<CieLch> source, Span<YCbCr> destination)
         {
             Guard.DestinationShouldNotBeTooShort(source, destination, nameof(destination));
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="CieLuv"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="CieXyz"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -122,7 +122,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="Cmyk"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -143,7 +143,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="Hsl"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -164,7 +164,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="Hsv"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -185,7 +185,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="HunterLab"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -206,7 +206,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="LinearRgb"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -227,7 +227,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="Lms"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -248,7 +248,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="YCbCr"/>
+        /// Performs the bulk conversion from <see cref="Rgb"/> into <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="source">The span to the source colors</param>
         /// <param name="destination">The span to the destination colors</param>
@@ -269,7 +269,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLab"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="CieLab"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -281,7 +281,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLch"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="CieLch"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -293,7 +293,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieLuv"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="CieLuv"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -305,7 +305,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyy"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="CieXyy"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -317,7 +317,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="CieXyz"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="CieXyz"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -329,7 +329,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Cmyk"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="Cmyk"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -341,7 +341,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsl"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="Hsl"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -353,7 +353,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Hsv"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="Hsv"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -365,7 +365,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="HunterLab"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="HunterLab"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -377,7 +377,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="LinearRgb"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="LinearRgb"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -389,7 +389,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Lms"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="Lms"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
@@ -401,7 +401,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         }
 
         /// <summary>
-        /// Converts a <see cref="Rgb"/> into a <see cref="YCbCr"/>
+        /// Converts a <see cref="Rgb"/> into a <see cref="YCbCr"/>.
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/VonKriesChromaticAdaptation.cs b/src/ImageSharp/ColorSpaces/Conversion/VonKriesChromaticAdaptation.cs
index 85a36331b2..a4d96d19e7 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/VonKriesChromaticAdaptation.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/VonKriesChromaticAdaptation.cs
@@ -10,13 +10,13 @@ using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion
 {
     /// <summary>
-    /// Basic implementation of the von Kries chromatic adaptation model
+    /// Implementation of the von Kries chromatic adaptation model.
     /// </summary>
     /// <remarks>
     /// Transformation described here:
     /// http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html
     /// </remarks>
-    public class VonKriesChromaticAdaptation : IChromaticAdaptation
+    public sealed class VonKriesChromaticAdaptation : IChromaticAdaptation
     {
         private readonly CieXyzAndLmsConverter converter;
 
diff --git a/src/ImageSharp/ColorSpaces/HunterLab.cs b/src/ImageSharp/ColorSpaces/HunterLab.cs
index dcae65e425..402761d8c1 100644
--- a/src/ImageSharp/ColorSpaces/HunterLab.cs
+++ b/src/ImageSharp/ColorSpaces/HunterLab.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
     /// Represents an Hunter LAB color.
-    /// <see href="https://en.wikipedia.org/wiki/Lab_color_space"/>
+    /// <see href="https://en.wikipedia.org/wiki/Lab_color_space"/>.
     /// </summary>
     public readonly struct HunterLab : IEquatable<HunterLab>
     {
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         public readonly float B;
 
         /// <summary>
-        /// Gets the reference white point of this color
+        /// Gets the reference white point of this color.
         /// </summary>
         public readonly CieXyz WhitePoint;
 
@@ -117,10 +117,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public override int GetHashCode()
-        {
-            return HashCode.Combine(this.L, this.A, this.B, this.WhitePoint);
-        }
+        public override int GetHashCode() => HashCode.Combine(this.L, this.A, this.B, this.WhitePoint);
 
         /// <inheritdoc/>
         public override string ToString() => FormattableString.Invariant($"HunterLab({this.L:#0.##}, {this.A:#0.##}, {this.B:#0.##})");
diff --git a/src/ImageSharp/ColorSpaces/Illuminants.cs b/src/ImageSharp/ColorSpaces/Illuminants.cs
index ed385e02cd..d5c1b3eed5 100644
--- a/src/ImageSharp/ColorSpaces/Illuminants.cs
+++ b/src/ImageSharp/ColorSpaces/Illuminants.cs
@@ -8,11 +8,9 @@ namespace SixLabors.ImageSharp.ColorSpaces
     /// Standard illuminants provide a basis for comparing images or colors recorded under different lighting
     /// </summary>
     /// <remarks>
-    /// Coefficients taken from:
-    /// http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html
+    /// Coefficients taken from: http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html
     /// <br />
-    /// Descriptions taken from:
-    /// http://en.wikipedia.org/wiki/Standard_illuminant
+    /// Descriptions taken from: http://en.wikipedia.org/wiki/Standard_illuminant
     /// </remarks>
     public static class Illuminants
     {
diff --git a/src/ImageSharp/ColorSpaces/Rgb.cs b/src/ImageSharp/ColorSpaces/Rgb.cs
index cdc9e90ad4..5cb89a2931 100644
--- a/src/ImageSharp/ColorSpaces/Rgb.cs
+++ b/src/ImageSharp/ColorSpaces/Rgb.cs
@@ -14,14 +14,14 @@ namespace SixLabors.ImageSharp.ColorSpaces
     /// </summary>
     public readonly struct Rgb : IEquatable<Rgb>
     {
-        private static readonly Vector3 Min = Vector3.Zero;
-        private static readonly Vector3 Max = Vector3.One;
-
         /// <summary>
-        /// The default rgb working space
+        /// The default rgb working space.
         /// </summary>
         public static readonly RgbWorkingSpaceBase DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
 
+        private static readonly Vector3 Min = Vector3.Zero;
+        private static readonly Vector3 Max = Vector3.One;
+
         /// <summary>
         /// Gets the red component.
         /// <remarks>A value usually ranging between 0 and 1.</remarks>
diff --git a/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs b/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
index ee3822c152..7ddcae7cea 100644
--- a/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
+++ b/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
@@ -8,8 +8,7 @@ using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation;
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Chromaticity coordinates taken from:
-    /// <see href="http://www.brucelindbloom.com/index.html?WorkingSpaceInfo.html"/>
+    /// Chromaticity coordinates based on: <see href="http://www.brucelindbloom.com/index.html?WorkingSpaceInfo.html"/>
     /// </summary>
     public static class RgbWorkingSpaces
     {
diff --git a/src/ImageSharp/Common/Extensions/EnumerableExtensions.cs b/src/ImageSharp/Common/Extensions/EnumerableExtensions.cs
index e97a2eaed0..e28db7cff1 100644
--- a/src/ImageSharp/Common/Extensions/EnumerableExtensions.cs
+++ b/src/ImageSharp/Common/Extensions/EnumerableExtensions.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Common
         /// The start index, inclusive.
         /// </param>
         /// <param name="toDelegate">
-        /// A method that has one parameter and returns a <see cref="bool"/> calculating the end index
+        /// A method that has one parameter and returns a <see cref="bool"/> calculating the end index.
         /// </param>
         /// <param name="step">
         /// The incremental step.
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.Common
         /// The start index, inclusive.
         /// </param>
         /// <param name="toDelegate">
-        /// A method that has one parameter and returns a <see cref="bool"/> calculating the end index
+        /// A method that has one parameter and returns a <see cref="bool"/> calculating the end index.
         /// </param>
         /// <param name="step">
         /// The incremental step.
diff --git a/src/ImageSharp/Common/Tuples/Octet.cs b/src/ImageSharp/Common/Tuples/Octet.cs
index 23faf08ae9..7ece2ed562 100644
--- a/src/ImageSharp/Common/Tuples/Octet.cs
+++ b/src/ImageSharp/Common/Tuples/Octet.cs
@@ -12,7 +12,7 @@ namespace SixLabors.ImageSharp.Tuples
     internal static class Octet
     {
         /// <summary>
-        /// Value tuple of <see cref="uint"/>-s
+        /// Value tuple of <see cref="uint"/>-s.
         /// </summary>
         [StructLayout(LayoutKind.Explicit, Size = 8 * sizeof(uint))]
         public struct OfUInt32
diff --git a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
index 6a740d47d1..c0814b1dfc 100644
--- a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
@@ -6,7 +6,7 @@ using System;
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
-    /// Detects bmp file headers
+    /// Detects bmp file headers.
     /// </summary>
     public sealed class BmpImageFormatDetector : IImageFormatDetector
     {
@@ -22,9 +22,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private bool IsSupportedFileFormat(ReadOnlySpan<byte> header)
         {
             // TODO: This should be in constants
-            return header.Length >= this.HeaderSize &&
-                   header[0] == 0x42 && // B
-                   header[1] == 0x4D;   // M
+            return header.Length >= this.HeaderSize
+                && header[0] == 0x42 // B
+                && header[1] == 0x4D; // M
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs b/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
index 42c202a3d9..0c59163cce 100644
--- a/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
+++ b/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         Encoding TextEncoding { get; }
 
         /// <summary>
-        /// Gets the decoding mode for multi-frame images
+        /// Gets the decoding mode for multi-frame images.
         /// </summary>
         FrameDecodingMode DecodingMode { get; }
     }
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
index 1f47de594c..a9e9903a9d 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.cs
@@ -97,7 +97,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             Vector4 CMin4 = new Vector4(0F);
             Vector4 CMax4 = new Vector4(maximum);
-            Vector4 COff4 = new Vector4((float)Math.Ceiling(maximum/2));
+            Vector4 COff4 = new Vector4(MathF.Ceiling(maximum / 2));
 
             this.V0L = Vector4.Clamp(this.V0L + COff4, CMin4, CMax4);
             this.V0R = Vector4.Clamp(this.V0R + COff4, CMin4, CMax4);
@@ -123,7 +123,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         [MethodImpl(InliningOptions.ShortMethod)]
         public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>((float)Math.Ceiling(maximum/2));
+            Vector<float> off = new Vector<float>(MathF.Ceiling(maximum / 2));
             Vector<float> max = new Vector<float>(maximum);
             
             ref Vector<float> row0 = ref Unsafe.As<Vector4, Vector<float>>(ref this.V0L);
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
index ec4e06e429..d6c42a802a 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Generated.tt
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             Vector4 CMin4 = new Vector4(0F);
             Vector4 CMax4 = new Vector4(maximum);
-            Vector4 COff4 = new Vector4((float)Math.Ceiling(maximum/2));
+            Vector4 COff4 = new Vector4(MathF.Ceiling(maximum / 2));
 
             <#
 
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         [MethodImpl(InliningOptions.ShortMethod)]
         public void NormalizeColorsAndRoundInplaceAvx2(float maximum)
         {
-            Vector<float> off = new Vector<float>((float)Math.Ceiling(maximum/2));
+            Vector<float> off = new Vector<float>(MathF.Ceiling(maximum / 2));
             Vector<float> max = new Vector<float>(maximum);
             <#
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
index c0de450695..c85bd725c9 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
@@ -147,7 +147,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Fill the block with defaults (zeroes)
+        /// Fill the block with defaults (zeroes).
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void Clear()
@@ -157,7 +157,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Load raw 32bit floating point data from source
+        /// Load raw 32bit floating point data from source.
         /// </summary>
         /// <param name="source">Source</param>
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -170,7 +170,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Load raw 32bit floating point data from source
+        /// Load raw 32bit floating point data from source.
         /// </summary>
         /// <param name="blockPtr">Block pointer</param>
         /// <param name="source">Source</param>
@@ -197,7 +197,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Copy raw 32bit floating point data to dest
+        /// Copy raw 32bit floating point data to dest,
         /// </summary>
         /// <param name="dest">Destination</param>
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -210,7 +210,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Convert salars to byte-s and copy to dest
+        /// Convert salars to byte-s and copy to dest,
         /// </summary>
         /// <param name="blockPtr">Pointer to block</param>
         /// <param name="dest">Destination</param>
@@ -226,10 +226,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Copy raw 32bit floating point data to dest
+        /// Copy raw 32bit floating point data to dest.
         /// </summary>
-        /// <param name="blockPtr">Block pointer</param>
-        /// <param name="dest">Destination</param>
+        /// <param name="blockPtr">The block pointer.</param>
+        /// <param name="dest">The destination.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static unsafe void CopyTo(Block8x8F* blockPtr, Span<float> dest)
         {
@@ -275,7 +275,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// <summary>
         /// Multiply all elements of the block.
         /// </summary>
-        /// <param name="value">The value to multiply by</param>
+        /// <param name="value">The value to multiply by.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void MultiplyInplace(float value)
         {
@@ -298,7 +298,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         }
 
         /// <summary>
-        /// Multiply all elements of the block by the corresponding elements of 'other'
+        /// Multiply all elements of the block by the corresponding elements of 'other'.
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void MultiplyInplace(ref Block8x8F other)
@@ -349,8 +349,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// <summary>
         /// Quantize the block.
         /// </summary>
-        /// <param name="blockPtr">Block pointer</param>
-        /// <param name="qtPtr">Qt pointer</param>
+        /// <param name="blockPtr">The block pointer.</param>
+        /// <param name="qtPtr">The qt pointer.</param>
         /// <param name="unzigPtr">Unzig pointer</param>
         // [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static unsafe void DequantizeBlock(Block8x8F* blockPtr, Block8x8F* qtPtr, byte* unzigPtr)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
index 43de39ac78..e34af98251 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <summary>
         /// Gets the horizontal downsampling hint used for DCT encoding
         /// 0x0 : (none - Chop)
-        /// Bit 15 : Encoded with Blend=1 downsampling
+        /// Bit 15 : Encoded with Blend=1 downsampling.
         /// </summary>
         public short APP14Flags0 { get; }
 
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// Converts the specified byte array representation of an Adobe marker to its <see cref="AdobeMarker"/> equivalent and
         /// returns a value that indicates whether the conversion succeeded.
         /// </summary>
-        /// <param name="bytes">The byte array containing metadata to parse</param>
+        /// <param name="bytes">The byte array containing metadata to parse.</param>
         /// <param name="marker">The marker to return.</param>
         public static bool TryParse(byte[] bytes, out AdobeMarker marker)
         {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
index d4dc31fe0c..a57535b71c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromCmyk.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromCmyk : JpegColorConverter
+        internal sealed class FromCmyk : JpegColorConverter
         {
             public FromCmyk(int precision)
                 : base(JpegColorSpace.Cmyk, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
index 4a5dfa6322..15bb2cf4b4 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromGrayScale.cs
@@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromGrayscale : JpegColorConverter
+        internal sealed class FromGrayscale : JpegColorConverter
         {
             public FromGrayscale(int precision)
                 : base(JpegColorSpace.Grayscale, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
index 516dfb39fe..2f68e312dc 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromRgb.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromRgb : JpegColorConverter
+        internal sealed class FromRgb : JpegColorConverter
         {
             public FromRgb(int precision)
                 : base(JpegColorSpace.RGB, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
index 124aac1224..a646cd6cfe 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrBasic.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromYCbCrBasic : JpegColorConverter
+        internal sealed class FromYCbCrBasic : JpegColorConverter
         {
             public FromYCbCrBasic(int precision)
                 : base(JpegColorSpace.YCbCr, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
index 10ef02a931..1706b4c1bc 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimd.cs
@@ -12,7 +12,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromYCbCrSimd : JpegColorConverter
+        internal sealed class FromYCbCrSimd : JpegColorConverter
         {
             public FromYCbCrSimd(int precision)
                 : base(JpegColorSpace.YCbCr, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
index 9953f78c18..093ea2f9a2 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYCbCrSimdAvx2.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromYCbCrSimdAvx2 : JpegColorConverter
+        internal sealed class FromYCbCrSimdAvx2 : JpegColorConverter
         {
             public FromYCbCrSimdAvx2(int precision)
                 : base(JpegColorSpace.YCbCr, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
index 94be11e237..cd8a3bb06c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.FromYccK.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
 {
     internal abstract partial class JpegColorConverter
     {
-        internal class FromYccK : JpegColorConverter
+        internal sealed class FromYccK : JpegColorConverter
         {
             public FromYccK(int precision)
                 : base(JpegColorSpace.Ycck, precision)
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
index c2e390c590..61e3598696 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ColorConverters/JpegColorConverter.cs
@@ -42,8 +42,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder.ColorConverters
         {
             this.ColorSpace = colorSpace;
             this.Precision = precision;
-            this.MaximumValue = (float)Math.Pow(2, precision) - 1;
-            this.HalfValue = (float)Math.Ceiling(this.MaximumValue / 2);
+            this.MaximumValue = MathF.Pow(2, precision) - 1;
+            this.HalfValue = MathF.Ceiling(this.MaximumValue / 2);
         }
 
         /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
index 57d2221ba3..dc78a89ddb 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     internal unsafe struct FastACTable
     {
         /// <summary>
-        /// Gets the lookahead array
+        /// Gets the lookahead array.
         /// </summary>
         public fixed short Lookahead[512];
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index a2c9bade19..7e025e271e 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -26,22 +26,22 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 #pragma warning restore IDE0044 // Add readonly modifier
 
         /// <summary>
-        /// Gets the max code array
+        /// Gets the max code array.
         /// </summary>
         public fixed uint MaxCode[18];
 
         /// <summary>
-        /// Gets the value offset array
+        /// Gets the value offset array.
         /// </summary>
         public fixed int ValOffset[18];
 
         /// <summary>
-        /// Gets the huffman value array
+        /// Gets the huffman value array.
         /// </summary>
         public fixed byte Values[256];
 
         /// <summary>
-        /// Gets the lookahead array
+        /// Gets the lookahead array.
         /// </summary>
         public fixed byte Lookahead[512];
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
index 76f0e2cb51..5bd5920dbe 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
@@ -7,7 +7,7 @@ using SixLabors.ImageSharp.MetaData;
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Provides information about the JFIF marker segment
+    /// Provides information about the JFIF marker segment.
     /// TODO: Thumbnail?
     /// </summary>
     internal readonly struct JFifMarker : IEquatable<JFifMarker>
@@ -20,11 +20,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <summary>
         /// Initializes a new instance of the <see cref="JFifMarker"/> struct.
         /// </summary>
-        /// <param name="majorVersion">The major version</param>
-        /// <param name="minorVersion">The minor version</param>
-        /// <param name="densityUnits">The units for the density values</param>
-        /// <param name="xDensity">The horizontal pixel density</param>
-        /// <param name="yDensity">The vertical pixel density</param>
+        /// <param name="majorVersion">The major version.</param>
+        /// <param name="minorVersion">The minor version.</param>
+        /// <param name="densityUnits">The units for the density values.</param>
+        /// <param name="xDensity">The horizontal pixel density.</param>
+        /// <param name="yDensity">The vertical pixel density.</param>
         private JFifMarker(byte majorVersion, byte minorVersion, byte densityUnits, short xDensity, short yDensity)
         {
             if (xDensity <= 0)
@@ -47,12 +47,12 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         /// <summary>
-        /// Gets the major version
+        /// Gets the major version.
         /// </summary>
         public byte MajorVersion { get; }
 
         /// <summary>
-        /// Gets the minor version
+        /// Gets the minor version.
         /// </summary>
         public byte MinorVersion { get; }
 
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// Converts the specified byte array representation of an JFIF marker to its <see cref="JFifMarker"/> equivalent and
         /// returns a value that indicates whether the conversion succeeded.
         /// </summary>
-        /// <param name="bytes">The byte array containing metadata to parse</param>
+        /// <param name="bytes">The byte array containing metadata to parse.</param>
         /// <param name="marker">The marker to return.</param>
         public static bool TryParse(byte[] bytes, out JFifMarker marker)
         {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
index fe39f41884..c5efb812e0 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegBlockPostProcessor.cs
@@ -20,17 +20,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public Block8x8F SourceBlock;
 
         /// <summary>
-        /// Temporal block 1 to store intermediate and/or final computation results
+        /// Temporal block 1 to store intermediate and/or final computation results.
         /// </summary>
         public Block8x8F WorkspaceBlock1;
 
         /// <summary>
-        /// Temporal block 2 to store intermediate and/or final computation results
+        /// Temporal block 2 to store intermediate and/or final computation results.
         /// </summary>
         public Block8x8F WorkspaceBlock2;
 
         /// <summary>
-        /// The quantization table as <see cref="Block8x8F"/>
+        /// The quantization table as <see cref="Block8x8F"/>.
         /// </summary>
         public Block8x8F DequantiazationTable;
 
@@ -40,9 +40,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         private Size subSamplingDivisors;
 
         /// <summary>
-        /// Defines the maximum value derived from the bitdepth
+        /// Defines the maximum value derived from the bitdepth.
         /// </summary>
-        private int maximumValue;
+        private readonly int maximumValue;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="JpegBlockPostProcessor"/> struct.
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int qtIndex = component.QuantizationTableIndex;
             this.DequantiazationTable = ZigZag.CreateDequantizationTable(ref decoder.QuantizationTables[qtIndex]);
             this.subSamplingDivisors = component.SubSamplingDivisors;
-            this.maximumValue = (int)Math.Pow(2, decoder.Precision) - 1;
+            this.maximumValue = (int)MathF.Pow(2, decoder.Precision) - 1;
 
             this.SourceBlock = default;
             this.WorkspaceBlock1 = default;
@@ -66,7 +66,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// - Dequantize
         /// - Applying IDCT
         /// - Level shift by +maximumValue/2, clip to [0, maximumValue]
-        /// - Copy the resulting color values into 'destArea' scaling up the block by amount defined in <see cref="subSamplingDivisors"/>
+        /// - Copy the resulting color values into 'destArea' scaling up the block by amount defined in <see cref="subSamplingDivisors"/>.
         /// </summary>
         /// <param name="sourceBlock">The source block.</param>
         /// <param name="destArea">The destination buffer area.</param>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegColorSpace.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegColorSpace.cs
index 2861a2c2e9..aa33744adf 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegColorSpace.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegColorSpace.cs
@@ -4,7 +4,7 @@
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Identifies the colorspace of a Jpeg image
+    /// Identifies the colorspace of a Jpeg image.
     /// </summary>
     internal enum JpegColorSpace
     {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
index ac24f4ca58..5353303947 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponent.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         /// <summary>
-        /// Gets the component Id.
+        /// Gets the component id.
         /// </summary>
         public byte Id { get; }
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
index e7f3e4fda5..e1a9380a03 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegComponentPostProcessor.cs
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public void CopyBlocksToColorBuffer()
         {
             var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
-            float maximumValue = (float)Math.Pow(2, this.ImagePostProcessor.RawJpeg.Precision) - 1;
+            float maximumValue = MathF.Pow(2, this.ImagePostProcessor.RawJpeg.Precision) - 1;
 
             for (int y = 0; y < this.BlockRowsPerStep; y++)
             {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
index 33a7c68baf..f426eb1b15 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegFrame.cs
@@ -11,68 +11,68 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     internal sealed class JpegFrame : IDisposable
     {
         /// <summary>
-        /// Gets or sets a value indicating whether the frame uses the extended specification
+        /// Gets or sets a value indicating whether the frame uses the extended specification.
         /// </summary>
         public bool Extended { get; set; }
 
         /// <summary>
-        /// Gets or sets a value indicating whether the frame uses the progressive specification
+        /// Gets or sets a value indicating whether the frame uses the progressive specification.
         /// </summary>
         public bool Progressive { get; set; }
 
         /// <summary>
-        /// Gets or sets the precision
+        /// Gets or sets the precision.
         /// </summary>
         public byte Precision { get; set; }
 
         /// <summary>
-        /// Gets or sets the number of scanlines within the frame
+        /// Gets or sets the number of scanlines within the frame.
         /// </summary>
         public short Scanlines { get; set; }
 
         /// <summary>
-        /// Gets or sets the number of samples per scanline
+        /// Gets or sets the number of samples per scanline.
         /// </summary>
         public short SamplesPerLine { get; set; }
 
         /// <summary>
-        /// Gets or sets the number of components within a frame. In progressive frames this value can range from only 1 to 4
+        /// Gets or sets the number of components within a frame. In progressive frames this value can range from only 1 to 4.
         /// </summary>
         public byte ComponentCount { get; set; }
 
         /// <summary>
-        /// Gets or sets the component id collection
+        /// Gets or sets the component id collection.
         /// </summary>
         public byte[] ComponentIds { get; set; }
 
         /// <summary>
-        /// Gets or sets the order in which to process the components
+        /// Gets or sets the order in which to process the components.
         /// in interleaved mode.
         /// </summary>
         public byte[] ComponentOrder { get; set; }
 
         /// <summary>
-        /// Gets or sets the frame component collection
+        /// Gets or sets the frame component collection.
         /// </summary>
         public JpegComponent[] Components { get; set; }
 
         /// <summary>
-        /// Gets or sets the maximum horizontal sampling factor
+        /// Gets or sets the maximum horizontal sampling factor.
         /// </summary>
         public int MaxHorizontalFactor { get; set; }
 
         /// <summary>
-        /// Gets or sets the maximum vertical sampling factor
+        /// Gets or sets the maximum vertical sampling factor.
         /// </summary>
         public int MaxVerticalFactor { get; set; }
 
         /// <summary>
-        /// Gets or sets the number of MCU's per line
+        /// Gets or sets the number of MCU's per line.
         /// </summary>
         public int McusPerLine { get; set; }
 
         /// <summary>
-        /// Gets or sets the number of MCU's per column
+        /// Gets or sets the number of MCU's per column.
         /// </summary>
         public int McusPerColumn { get; set; }
 
@@ -91,7 +91,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         /// <summary>
-        /// Allocates the frame component blocks
+        /// Allocates the frame component blocks.
         /// </summary>
         public void InitComponents()
         {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
index 3e7108b151..abfd6f556c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
@@ -12,30 +12,30 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     internal static class ProfileResolver
     {
         /// <summary>
-        /// Describes the EXIF specific markers
+        /// Describes the EXIF specific markers.
         /// </summary>
         public static readonly byte[] JFifMarker = Encoding.ASCII.GetBytes("JFIF\0");
 
         /// <summary>
-        /// Describes the EXIF specific markers
+        /// Describes the EXIF specific markers.
         /// </summary>
         public static readonly byte[] IccMarker = Encoding.ASCII.GetBytes("ICC_PROFILE\0");
 
         /// <summary>
-        /// Describes the ICC specific markers
+        /// Describes the ICC specific markers.
         /// </summary>
         public static readonly byte[] ExifMarker = Encoding.ASCII.GetBytes("Exif\0\0");
 
         /// <summary>
-        /// Describes Adobe specific markers <see href="http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html#Adobe"/>
+        /// Describes Adobe specific markers <see href="http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html#Adobe"/>.
         /// </summary>
         public static readonly byte[] AdobeMarker = Encoding.ASCII.GetBytes("Adobe");
 
         /// <summary>
-        /// Returns a value indicating whether the passed bytes are a match to the profile identifier
+        /// Returns a value indicating whether the passed bytes are a match to the profile identifier.
         /// </summary>
-        /// <param name="bytesToCheck">The bytes to check</param>
-        /// <param name="profileIdentifier">The profile identifier</param>
+        /// <param name="bytesToCheck">The bytes to check.</param>
+        /// <param name="profileIdentifier">The profile identifier.</param>
         /// <returns>The <see cref="bool"/></returns>
         public static bool IsProfile(ReadOnlySpan<byte> bytesToCheck, ReadOnlySpan<byte> profileIdentifier)
         {
diff --git a/src/ImageSharp/IImageInfo.cs b/src/ImageSharp/IImageInfo.cs
index 6e64aa679a..b1b1afc66f 100644
--- a/src/ImageSharp/IImageInfo.cs
+++ b/src/ImageSharp/IImageInfo.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp
 {
     /// <summary>
     /// Encapsulates properties that describe basic image information including dimensions, pixel type information
-    /// and additional metadata
+    /// and additional metadata.
     /// </summary>
     public interface IImageInfo
     {
diff --git a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
index 8530ecec52..6d5673d5a4 100644
--- a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
+++ b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
@@ -13,10 +13,10 @@ namespace SixLabors.ImageSharp.IO
     /// A stream reader that add a secondary level buffer in addition to native stream buffered reading
     /// to reduce the overhead of small incremental reads.
     /// </summary>
-    internal class DoubleBufferedStreamReader : IDisposable
+    internal sealed class DoubleBufferedStreamReader : IDisposable
     {
         /// <summary>
-        /// The length, in bytes, of the buffering chunk
+        /// The length, in bytes, of the buffering chunk.
         /// </summary>
         public const int ChunkLength = 4096;
 
@@ -49,12 +49,12 @@ namespace SixLabors.ImageSharp.IO
         }
 
         /// <summary>
-        /// Gets the length, in bytes, of the stream
+        /// Gets the length, in bytes, of the stream.
         /// </summary>
         public long Length => this.length;
 
         /// <summary>
-        /// Gets or sets the current position within the stream
+        /// Gets or sets the current position within the stream.
         /// </summary>
         public long Position
         {
diff --git a/src/ImageSharp/IO/Endianness.cs b/src/ImageSharp/IO/Endianness.cs
deleted file mode 100644
index 59b2ae77c1..0000000000
--- a/src/ImageSharp/IO/Endianness.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-namespace SixLabors.ImageSharp.IO
-{
-    /// <summary>
-    /// Endianness of a converter
-    /// </summary>
-    internal enum Endianness
-    {
-        /// <summary>
-        /// Little endian - least significant byte first
-        /// </summary>
-        LittleEndian,
-
-        /// <summary>
-        /// Big endian - most significant byte first
-        /// </summary>
-        BigEndian
-    }
-}
diff --git a/src/ImageSharp/IO/LocalFileSystem.cs b/src/ImageSharp/IO/LocalFileSystem.cs
index dc5901ff92..11f3d79723 100644
--- a/src/ImageSharp/IO/LocalFileSystem.cs
+++ b/src/ImageSharp/IO/LocalFileSystem.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.IO
     /// <summary>
     /// A wrapper around the local File apis.
     /// </summary>
-    internal class LocalFileSystem : IFileSystem
+    internal sealed class LocalFileSystem : IFileSystem
     {
         /// <inheritdoc/>
         public Stream OpenRead(string path) => File.OpenRead(path);
diff --git a/src/ImageSharp/Image.FromBytes.cs b/src/ImageSharp/Image.FromBytes.cs
index 34927e6e2b..7ceeea9498 100644
--- a/src/ImageSharp/Image.FromBytes.cs
+++ b/src/ImageSharp/Image.FromBytes.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.IO;
-using System.Linq;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -32,7 +31,7 @@ namespace SixLabors.ImageSharp
         /// <returns>The mime type or null if none found.</returns>
         public static IImageFormat DetectFormat(Configuration config, byte[] data)
         {
-            using (Stream stream = new MemoryStream(data))
+            using (var stream = new MemoryStream(data))
             {
                 return DetectFormat(config, stream);
             }
@@ -118,9 +117,9 @@ namespace SixLabors.ImageSharp
         public static Image<TPixel> Load<TPixel>(Configuration config, byte[] data)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (var memoryStream = new MemoryStream(data))
+            using (var steram = new MemoryStream(data))
             {
-                return Load<TPixel>(config, memoryStream);
+                return Load<TPixel>(config, steram);
             }
         }
 
@@ -135,9 +134,9 @@ namespace SixLabors.ImageSharp
         public static Image<TPixel> Load<TPixel>(Configuration config, byte[] data, out IImageFormat format)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (var memoryStream = new MemoryStream(data))
+            using (var stream = new MemoryStream(data))
             {
-                return Load<TPixel>(config, memoryStream, out format);
+                return Load<TPixel>(config, stream, out format);
             }
         }
 
@@ -151,9 +150,9 @@ namespace SixLabors.ImageSharp
         public static Image<TPixel> Load<TPixel>(byte[] data, IImageDecoder decoder)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (var memoryStream = new MemoryStream(data))
+            using (var stream = new MemoryStream(data))
             {
-                return Load<TPixel>(memoryStream, decoder);
+                return Load<TPixel>(stream, decoder);
             }
         }
 
diff --git a/src/ImageSharp/Image.WrapMemory.cs b/src/ImageSharp/Image.WrapMemory.cs
index c2935bed93..4bb24a126b 100644
--- a/src/ImageSharp/Image.WrapMemory.cs
+++ b/src/ImageSharp/Image.WrapMemory.cs
@@ -7,7 +7,6 @@ using System.Buffers;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.MetaData;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp
 {
@@ -22,10 +21,10 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
         /// <param name="config">The <see cref="Configuration"/></param>
-        /// <param name="pixelMemory">The pixel memory</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
-        /// <param name="metaData">The <see cref="ImageMetaData"/></param>
+        /// <param name="pixelMemory">The pixel memory.</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
+        /// <param name="metaData">The <see cref="ImageMetaData"/>.</param>
         /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Configuration config,
@@ -45,10 +44,10 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
         /// <param name="config">The <see cref="Configuration"/></param>
-        /// <param name="pixelMemory">The pixel memory</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
-        /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
+        /// <param name="pixelMemory">The pixel memory.</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
+        /// <returns>An <see cref="Image{TPixel}"/> instance.</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Configuration config,
             Memory<TPixel> pixelMemory,
@@ -64,11 +63,11 @@ namespace SixLabors.ImageSharp
         /// allowing to view/manipulate it as an ImageSharp <see cref="Image{TPixel}"/> instance.
         /// The memory is being observed, the caller remains responsible for managing it's lifecycle.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="pixelMemory">The pixel memory</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
-        /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
+        /// <param name="pixelMemory">The pixel memory.</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
+        /// <returns>An <see cref="Image{TPixel}"/> instance.</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Memory<TPixel> pixelMemory,
             int width,
@@ -88,8 +87,8 @@ namespace SixLabors.ImageSharp
         /// <typeparam name="TPixel">The pixel type</typeparam>
         /// <param name="config">The <see cref="Configuration"/></param>
         /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
         /// <param name="metaData">The <see cref="ImageMetaData"/></param>
         /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
@@ -111,11 +110,11 @@ namespace SixLabors.ImageSharp
         /// meaning that the caller is not allowed to dispose <paramref name="pixelMemoryOwner"/>.
         /// It will be disposed together with the result image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel type</typeparam>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
         /// <param name="config">The <see cref="Configuration"/></param>
-        /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
+        /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image.</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
         /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Configuration config,
@@ -135,10 +134,10 @@ namespace SixLabors.ImageSharp
         /// It will be disposed together with the result image.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image</param>
-        /// <param name="width">The width of the memory image</param>
-        /// <param name="height">The height of the memory image</param>
-        /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
+        /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image.</param>
+        /// <param name="width">The width of the memory image.</param>
+        /// <param name="height">The height of the memory image.</param>
+        /// <returns>An <see cref="Image{TPixel}"/> instance.</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             IMemoryOwner<TPixel> pixelMemoryOwner,
             int width,
diff --git a/src/ImageSharp/ImageExtensions.Internal.cs b/src/ImageSharp/ImageExtensions.Internal.cs
index dfdbbd89b8..5b5e566659 100644
--- a/src/ImageSharp/ImageExtensions.Internal.cs
+++ b/src/ImageSharp/ImageExtensions.Internal.cs
@@ -3,7 +3,6 @@
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp
 {
diff --git a/src/ImageSharp/ImageExtensions.cs b/src/ImageSharp/ImageExtensions.cs
index cbf93275c8..5010451b8e 100644
--- a/src/ImageSharp/ImageExtensions.cs
+++ b/src/ImageSharp/ImageExtensions.cs
@@ -12,7 +12,7 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Extension methods over Image{TPixel}
+    /// Extension methods over Image{TPixel}.
     /// </summary>
     public static partial class ImageExtensions
     {
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp
             if (format is null)
             {
                 var sb = new StringBuilder();
-                sb.AppendLine($"Can't find a format that is associated with the file extension '{ext}'. Registered formats with there extensions include:");
+                sb.AppendLine($"No encoder was found for extension '{ext}'. Registered encoders include:");
                 foreach (IImageFormat fmt in source.GetConfiguration().ImageFormats)
                 {
                     sb.AppendLine($" - {fmt.Name} : {string.Join(", ", fmt.FileExtensions)}");
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp
             if (encoder is null)
             {
                 var sb = new StringBuilder();
-                sb.AppendLine($"Can't find encoder for file extension '{ext}' using image format '{format.Name}'. Registered encoders include:");
+                sb.AppendLine($"No encoder was found for extension '{ext}' using image format '{format.Name}'. Registered encoders include:");
                 foreach (KeyValuePair<IImageFormat, IImageEncoder> enc in source.GetConfiguration().ImageFormatsManager.ImageEncoders)
                 {
                     sb.AppendLine($" - {enc.Key} : {enc.Value.GetType().Name}");
@@ -94,7 +94,7 @@ namespace SixLabors.ImageSharp
             if (encoder is null)
             {
                 var sb = new StringBuilder();
-                sb.AppendLine("Can't find encoder for provided mime type. Available encoded:");
+                sb.AppendLine("No encoder was found for the provided mime type. Registered encoders include:");
 
                 foreach (KeyValuePair<IImageFormat, IImageEncoder> val in source.GetConfiguration().ImageFormatsManager.ImageEncoders)
                 {
diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 501ed5e69c..835e880e94 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -22,24 +22,21 @@ namespace SixLabors.ImageSharp.Memory
         }
 
         /// <summary>
-        /// Gets the INCLUSIVE minimum
+        /// Gets the INCLUSIVE minimum.
         /// </summary>
         public int Min { get; }
 
         /// <summary>
-        /// Gets the EXCLUSIVE maximum
+        /// Gets the EXCLUSIVE maximum.
         /// </summary>
         public int Max { get; }
 
         /// <summary>
-        /// Gets the difference (<see cref="Max"/> - <see cref="Min"/>)
+        /// Gets the difference (<see cref="Max"/> - <see cref="Min"/>).
         /// </summary>
         public int Height => this.Max - this.Min;
 
         /// <inheritdoc />
-        public override string ToString()
-        {
-            return $"RowInterval [{this.Min}->{this.Max}[";
-        }
+        public override string ToString() => $"RowInterval [{this.Min}->{this.Max}]";
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/MetaData/ImageProperty.cs b/src/ImageSharp/MetaData/ImageProperty.cs
index 24a3686de2..6d38b6bf13 100644
--- a/src/ImageSharp/MetaData/ImageProperty.cs
+++ b/src/ImageSharp/MetaData/ImageProperty.cs
@@ -107,10 +107,7 @@ namespace SixLabors.ImageSharp.MetaData
         /// <returns>
         /// A <see cref="T:System.String"/> containing a fully qualified type name.
         /// </returns>
-        public override string ToString()
-        {
-            return $"ImageProperty [ Name={this.Name}, Value={this.Value} ]";
-        }
+        public override string ToString() => $"ImageProperty [ Name={this.Name}, Value={this.Value} ]";
 
         /// <summary>
         /// Indicates whether the current object is equal to another object of the same type.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
index 8ec9eea275..cf95affb04 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
@@ -8,20 +8,19 @@ using System.Collections.ObjectModel;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Text;
-using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Primitives;
 
 namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
 {
     /// <summary>
-    /// Reads and parses EXIF data from a byte array
+    /// Reads and parses EXIF data from a byte array.
     /// </summary>
     internal sealed class ExifReader
     {
         private List<ExifTag> invalidTags;
         private readonly byte[] exifData;
         private int position;
-        private Endianness endianness = Endianness.BigEndian;
+        private bool isBigEndian;
         private uint exifOffset;
         private uint gpsOffset;
 
@@ -38,12 +37,12 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
         public IReadOnlyList<ExifTag> InvalidTags => this.invalidTags ?? (IReadOnlyList<ExifTag>)Array.Empty<ExifTag>();
 
         /// <summary>
-        /// Gets the thumbnail length in the byte stream
+        /// Gets the thumbnail length in the byte stream.
         /// </summary>
         public uint ThumbnailLength { get; private set; }
 
         /// <summary>
-        /// Gets the thumbnail offset position in the byte stream
+        /// Gets the thumbnail offset position in the byte stream.
         /// </summary>
         public uint ThumbnailOffset { get; private set; }
 
@@ -74,10 +73,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
             var values = new List<ExifValue>();
 
             // II == 0x4949
-            if (this.ReadUInt16() == 0x4949)
-            {
-                this.endianness = Endianness.LittleEndian;
-            }
+            this.isBigEndian = !(this.ReadUInt16() == 0x4949);
 
             if (this.ReadUInt16() != 0x002A)
             {
@@ -382,7 +378,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
 
         [MethodImpl(InliningOptions.ShortMethod)]
         private TEnum ToEnum<TEnum>(int value, TEnum defaultValue)
-            where TEnum : struct
+            where TEnum : struct, Enum
         {
             if (EnumHelper<TEnum>.IsDefined(value))
             {
@@ -458,7 +454,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            long intValue = this.endianness == Endianness.BigEndian
+            long intValue = this.isBigEndian
                 ? BinaryPrimitives.ReadInt64BigEndian(buffer)
                 : BinaryPrimitives.ReadInt64LittleEndian(buffer);
 
@@ -473,7 +469,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            return this.endianness == Endianness.BigEndian
+            return this.isBigEndian
                 ? BinaryPrimitives.ReadUInt32BigEndian(buffer)
                 : BinaryPrimitives.ReadUInt32LittleEndian(buffer);
         }
@@ -485,7 +481,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            return this.endianness == Endianness.BigEndian
+            return this.isBigEndian
                 ? BinaryPrimitives.ReadUInt16BigEndian(buffer)
                 : BinaryPrimitives.ReadUInt16LittleEndian(buffer);
         }
@@ -497,7 +493,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            int intValue = this.endianness == Endianness.BigEndian
+            int intValue = this.isBigEndian
                 ? BinaryPrimitives.ReadInt32BigEndian(buffer)
                 : BinaryPrimitives.ReadInt32LittleEndian(buffer);
 
@@ -526,7 +522,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            return this.endianness == Endianness.BigEndian
+            return this.isBigEndian
                 ? BinaryPrimitives.ReadInt32BigEndian(buffer)
                 : BinaryPrimitives.ReadInt32LittleEndian(buffer);
         }
@@ -551,13 +547,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
                 return default;
             }
 
-            return this.endianness == Endianness.BigEndian
+            return this.isBigEndian
                 ? BinaryPrimitives.ReadInt16BigEndian(buffer)
                 : BinaryPrimitives.ReadInt16LittleEndian(buffer);
         }
 
-        private class EnumHelper<TEnum>
-            where TEnum : struct
+        private sealed class EnumHelper<TEnum>
+            where TEnum : struct, Enum
         {
             private static readonly int[] Values = Enum.GetValues(typeof(TEnum)).Cast<TEnum>()
                 .Select(e => Convert.ToInt32(e)).OrderBy(e => e).ToArray();
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
index 8f273dd603..4bcd1b6861 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
@@ -35,22 +35,22 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Gets the colorant name
+        /// Gets the colorant name.
         /// </summary>
         public string Name { get; }
 
         /// <summary>
-        /// Gets the first PCS value
+        /// Gets the first PCS value.
         /// </summary>
         public ushort Pcs1 { get; }
 
         /// <summary>
-        /// Gets the second PCS value
+        /// Gets the second PCS value.
         /// </summary>
         public ushort Pcs2 { get; }
 
         /// <summary>
-        /// Gets the third PCS value
+        /// Gets the third PCS value.
         /// </summary>
         public ushort Pcs3 { get; }
 
@@ -110,9 +110,6 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{this.Name}: {this.Pcs1}; {this.Pcs2}; {this.Pcs3}";
-        }
+        public override string ToString() => $"{this.Name}: {this.Pcs1}; {this.Pcs2}; {this.Pcs3}";
     }
 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
index 00ededca4d..1920e97fe1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
@@ -49,9 +49,6 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             this.Text == other.Text;
 
         /// <inheritdoc />
-        public override string ToString()
-        {
-            return $"{this.Culture.Name}: {this.Text}";
-        }
+        public override string ToString() => $"{this.Culture.Name}: {this.Text}";
     }
 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
index f64d5409ae..710e6bb252 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
@@ -31,27 +31,27 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Gets the first part of the ID
+        /// Gets the first part of the ID.
         /// </summary>
         public uint Part1 { get; }
 
         /// <summary>
-        /// Gets the second part of the ID
+        /// Gets the second part of the ID.
         /// </summary>
         public uint Part2 { get; }
 
         /// <summary>
-        /// Gets the third part of the ID
+        /// Gets the third part of the ID.
         /// </summary>
         public uint Part3 { get; }
 
         /// <summary>
-        /// Gets the fourth part of the ID
+        /// Gets the fourth part of the ID.
         /// </summary>
         public uint Part4 { get; }
 
         /// <summary>
-        /// Gets a value indicating whether the ID is set or just consists of zeros
+        /// Gets a value indicating whether the ID is set or just consists of zeros.
         /// </summary>
         public bool IsSet => !this.Equals(Zero);
 
@@ -86,10 +86,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccProfileId other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccProfileId other && this.Equals(other);
 
         /// <inheritdoc/>
         public bool Equals(IccProfileId other) =>
@@ -109,14 +106,8 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{ToHex(this.Part1)}-{ToHex(this.Part2)}-{ToHex(this.Part3)}-{ToHex(this.Part4)}";
-        }
+        public override string ToString() => $"{ToHex(this.Part1)}-{ToHex(this.Part2)}-{ToHex(this.Part3)}-{ToHex(this.Part4)}";
 
-        private static string ToHex(uint value)
-        {
-            return value.ToString("X").PadLeft(8, '0');
-        }
+        private static string ToHex(uint value) => value.ToString("X").PadLeft(8, '0');
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
index e8885a66bf..7e2072d5bb 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
@@ -26,12 +26,12 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Gets the screen frequency
+        /// Gets the screen frequency.
         /// </summary>
         public float Frequency { get; }
 
         /// <summary>
-        /// Gets the angle in degrees
+        /// Gets the angle in degrees.
         /// </summary>
         public float Angle { get; }
 
@@ -89,9 +89,6 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{this.Frequency}Hz; {this.Angle}°; {this.SpotShape}";
-        }
+        public override string ToString() => $"{this.Frequency}Hz; {this.Angle}°; {this.SpotShape}";
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
index d93e068c52..7713c4faa1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
@@ -24,17 +24,17 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Gets the signature of the tag
+        /// Gets the signature of the tag.
         /// </summary>
         public IccProfileTag Signature { get; }
 
         /// <summary>
-        /// Gets the offset of entry in bytes
+        /// Gets the offset of entry in bytes.
         /// </summary>
         public uint Offset { get; }
 
         /// <summary>
-        /// Gets the size of entry in bytes
+        /// Gets the size of entry in bytes.
         /// </summary>
         public uint DataSize { get; }
 
@@ -69,10 +69,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccTagTableEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccTagTableEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public bool Equals(IccTagTableEntry other) =>
@@ -81,15 +78,9 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             this.DataSize.Equals(other.DataSize);
 
         /// <inheritdoc/>
-        public override int GetHashCode()
-        {
-            return HashCode.Combine(this.Signature, this.Offset, this.DataSize);
-        }
+        public override int GetHashCode() => HashCode.Combine(this.Signature, this.Offset, this.DataSize);
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{this.Signature} (Offset: {this.Offset}; Size: {this.DataSize})";
-        }
+        public override string ToString() => $"{this.Signature} (Offset: {this.Offset}; Size: {this.DataSize})";
     }
 }
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
index 82698d5085..8a9368463f 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
@@ -164,10 +164,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         {
             vector = Vector4.Clamp(vector, MinusOne, Vector4.One) * Half;
 
-            uint byte4 = ((uint)Math.Round(vector.X) & 0xFF) << 0;
-            uint byte3 = ((uint)Math.Round(vector.Y) & 0xFF) << 8;
-            uint byte2 = ((uint)Math.Round(vector.Z) & 0xFF) << 16;
-            uint byte1 = ((uint)Math.Round(vector.W) & 0xFF) << 24;
+            uint byte4 = ((uint)MathF.Round(vector.X) & 0xFF) << 0;
+            uint byte3 = ((uint)MathF.Round(vector.Y) & 0xFF) << 8;
+            uint byte2 = ((uint)MathF.Round(vector.Z) & 0xFF) << 16;
+            uint byte1 = ((uint)MathF.Round(vector.W) & 0xFF) << 24;
 
             return byte4 | byte3 | byte2 | byte1;
         }
diff --git a/src/ImageSharp/Primitives/LongRational.cs b/src/ImageSharp/Primitives/LongRational.cs
index d790b110d0..b15aa4022f 100644
--- a/src/ImageSharp/Primitives/LongRational.cs
+++ b/src/ImageSharp/Primitives/LongRational.cs
@@ -8,7 +8,7 @@ using System.Text;
 namespace SixLabors.ImageSharp.Primitives
 {
     /// <summary>
-    /// Represents a number that can be expressed as a fraction
+    /// Represents a number that can be expressed as a fraction.
     /// </summary>
     /// <remarks>
     /// This is a very simplified implementation of a rational number designed for use with metadata only.
diff --git a/src/ImageSharp/Primitives/ValueSize.cs b/src/ImageSharp/Primitives/ValueSize.cs
index e5e086540d..44bee50309 100644
--- a/src/ImageSharp/Primitives/ValueSize.cs
+++ b/src/ImageSharp/Primitives/ValueSize.cs
@@ -28,22 +28,22 @@ namespace SixLabors.ImageSharp.Primitives
         }
 
         /// <summary>
-        /// Enumerates the different value types
+        /// Enumerates the different value types.
         /// </summary>
         public enum ValueSizeType
         {
             /// <summary>
-            /// The value is the final return value
+            /// The value is the final return value.
             /// </summary>
             Absolute,
 
             /// <summary>
-            /// The value is a percentage of the image width
+            /// The value is a percentage of the image width.
             /// </summary>
             PercentageOfWidth,
 
             /// <summary>
-            /// The value is a percentage of the images height
+            /// The value is a percentage of the images height.
             /// </summary>
             PercentageOfHeight
         }
@@ -59,11 +59,10 @@ namespace SixLabors.ImageSharp.Primitives
         public ValueSizeType Type { get; }
 
         /// <summary>
-        /// Implicitly converts a float into an absolute value
+        /// Implicitly converts a float into an absolute value.
         /// </summary>
         /// <param name="f">the value to use as the absolute figure.</param>
-        public static implicit operator ValueSize(float f)
-            => Absolute(f);
+        public static implicit operator ValueSize(float f) => Absolute(f);
 
         /// <summary>
         /// Create a new ValueSize with as a PercentageOfWidth type with value set to percentage.
@@ -89,7 +88,7 @@ namespace SixLabors.ImageSharp.Primitives
         /// Create a new ValueSize with as a Absolute type with value set to value.
         /// </summary>
         /// <param name="value">The value.</param>
-        /// <returns>a Values size with type Absolute(</returns>
+        /// <returns>a Values size with type Absolute.</returns>
         public static ValueSize Absolute(float value)
         {
             return new ValueSize(value, ValueSizeType.Absolute);
@@ -99,7 +98,7 @@ namespace SixLabors.ImageSharp.Primitives
         /// Calculates the specified size.
         /// </summary>
         /// <param name="size">The size.</param>
-        /// <returns>The calculated value</returns>
+        /// <returns>The calculated value.</returns>
         public float Calculate(Size size)
         {
             switch (this.Type)
@@ -115,10 +114,7 @@ namespace SixLabors.ImageSharp.Primitives
         }
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{this.Value} - {this.Type}";
-        }
+        public override string ToString() => $"{this.Value} - {this.Type}";
 
         /// <inheritdoc/>
         public override bool Equals(object obj)

From 51a6647e5bc26db52d7bd580fe1639a7bd23b1bb Mon Sep 17 00:00:00 2001
From: Poyo <Poyo-SSB@users.noreply.github.com>
Date: Wed, 3 Apr 2019 05:32:32 -0700
Subject: [PATCH 046/223] Fix incorrect gradient color-stop calculation (#864)

* Fix incorrect gradient color-stop calculation

* Update submodule

* Add multi-stop gradient test

* Add missing reference image
---
 .../Processing/GradientBrushBase{TPixel}.cs   |  2 +-
 .../Drawing/FillLinearGradientBrushTests.cs   | 47 +++++++++++++++++++
 tests/Images/External                         |  2 +-
 3 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
index 00141a8d8d..ca565c46c9 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
@@ -121,7 +121,7 @@ namespace SixLabors.ImageSharp.Processing
                     {
                         var fromAsVector = from.Color.ToVector4();
                         var toAsVector = to.Color.ToVector4();
-                        float onLocalGradient = (positionOnCompleteGradient - from.Ratio) / to.Ratio;
+                        float onLocalGradient = (positionOnCompleteGradient - from.Ratio) / (to.Ratio - from.Ratio);
 
                         // TODO: this should be changeble for different gradienting functions
                         Vector4 result = PorterDuffFunctions.NormalSrcOver(
diff --git a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
index 556ec9c9ca..0bab2c079b 100644
--- a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
@@ -350,5 +350,52 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 false,
                 false);
         }
+
+        [Theory]
+        [WithBlankImages(200, 200, PixelTypes.Rgba32, 0, 0, 199, 199, new[] { 0f, .25f, .5f, .75f, 1f }, new[] { 0, 1, 2, 3, 4 })]
+        public void MultiplePointGradients<TPixel>(
+            TestImageProvider<TPixel> provider,
+            int startX, int startY,
+            int endX, int endY,
+            float[] stopPositions,
+            int[] stopColorCodes)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel[] colors =
+            {
+                NamedColors<TPixel>.Black, NamedColors<TPixel>.Blue, NamedColors<TPixel>.Red,
+                NamedColors<TPixel>.White, NamedColors<TPixel>.Lime
+            };
+
+            var coloringVariant = new StringBuilder();
+            var colorStops = new ColorStop<TPixel>[stopPositions.Length];
+
+            for (int i = 0; i < stopPositions.Length; i++)
+            {
+                TPixel color = colors[stopColorCodes[i % colors.Length]];
+                float position = stopPositions[i];
+                colorStops[i] = new ColorStop<TPixel>(position, color);
+                Rgba32 rgba = default;
+                color.ToRgba32(ref rgba);
+                coloringVariant.AppendFormat(CultureInfo.InvariantCulture, "{0}@{1};", rgba.ToHex(), position);
+            }
+
+            FormattableString variant = $"({startX},{startY})_TO_({endX},{endY})__[{coloringVariant}]";
+
+            provider.VerifyOperation(
+                image =>
+                {
+                    var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                        new SixLabors.Primitives.Point(startX, startY),
+                        new SixLabors.Primitives.Point(endX, endY),
+                        GradientRepetitionMode.None,
+                        colorStops);
+
+                    image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
+                },
+                variant,
+                false,
+                false);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 9d71985545..bc2765fb94 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 9d71985545bb827270ca34af3f78e4c220560ef1
+Subproject commit bc2765fb949d5d4ddba289b29174022bb94646de

From d382faf0f783ee8237d9c71e662fda7d5fad9689 Mon Sep 17 00:00:00 2001
From: Poyo <Poyo-SSB@users.noreply.github.com>
Date: Wed, 3 Apr 2019 15:12:31 -0700
Subject: [PATCH 047/223] Change existing gradient brushes to accept PointF
 (#865)

* Change existing gradient brushes to accept PointF

* Change PositionOnGradient to accept float

* Remove invalid assert.
---
 .../EllipticGradientBrush{TPixel}.cs          | 18 +++++++--------
 .../Processing/GradientBrushBase{TPixel}.cs   | 12 +++++-----
 .../Processing/LinearGradientBrush{TPixel}.cs | 22 +++++++++----------
 .../Processing/RadialGradientBrush{TPixel}.cs | 10 ++++-----
 .../Drawing/FillLinearGradientBrushTests.cs   |  4 ----
 tests/Images/External                         |  2 +-
 6 files changed, 32 insertions(+), 36 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
index 8af01564c4..64901c8e80 100644
--- a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
@@ -18,9 +18,9 @@ namespace SixLabors.ImageSharp.Processing
     public sealed class EllipticGradientBrush<TPixel> : GradientBrushBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly Point center;
+        private readonly PointF center;
 
-        private readonly Point referenceAxisEnd;
+        private readonly PointF referenceAxisEnd;
 
         private readonly float axisRatio;
 
@@ -35,8 +35,8 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="repetitionMode">Defines how the colors of the gradients are repeated.</param>
         /// <param name="colorStops">the color stops as defined in base class.</param>
         public EllipticGradientBrush(
-            Point center,
-            Point referenceAxisEnd,
+            PointF center,
+            PointF referenceAxisEnd,
             float axisRatio,
             GradientRepetitionMode repetitionMode,
             params ColorStop<TPixel>[] colorStops)
@@ -64,9 +64,9 @@ namespace SixLabors.ImageSharp.Processing
         /// <inheritdoc />
         private sealed class RadialGradientBrushApplicator : GradientBrushApplicatorBase
         {
-            private readonly Point center;
+            private readonly PointF center;
 
-            private readonly Point referenceAxisEnd;
+            private readonly PointF referenceAxisEnd;
 
             private readonly float axisRatio;
 
@@ -99,8 +99,8 @@ namespace SixLabors.ImageSharp.Processing
             public RadialGradientBrushApplicator(
                 ImageFrame<TPixel> target,
                 GraphicsOptions options,
-                Point center,
-                Point referenceAxisEnd,
+                PointF center,
+                PointF referenceAxisEnd,
                 float axisRatio,
                 ColorStop<TPixel>[] colorStops,
                 GradientRepetitionMode repetitionMode)
@@ -129,7 +129,7 @@ namespace SixLabors.ImageSharp.Processing
             }
 
             /// <inheritdoc />
-            protected override float PositionOnGradient(int xt, int yt)
+            protected override float PositionOnGradient(float xt, float yt)
             {
                 float x0 = xt - this.center.X;
                 float y0 = yt - this.center.Y;
diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
index ca565c46c9..2dfae9e8f1 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
@@ -81,7 +81,7 @@ namespace SixLabors.ImageSharp.Processing
             {
                 get
                 {
-                    float positionOnCompleteGradient = this.PositionOnGradient(x, y);
+                    float positionOnCompleteGradient = this.PositionOnGradient(x + 0.5f, y + 0.5f);
 
                     switch (this.repetitionMode)
                     {
@@ -137,18 +137,18 @@ namespace SixLabors.ImageSharp.Processing
             }
 
             /// <summary>
-            /// calculates the position on the gradient for a given pixel.
+            /// calculates the position on the gradient for a given point.
             /// This method is abstract as it's content depends on the shape of the gradient.
             /// </summary>
-            /// <param name="x">The x coordinate of the pixel</param>
-            /// <param name="y">The y coordinate of the pixel</param>
+            /// <param name="x">The x coordinate of the point</param>
+            /// <param name="y">The y coordinate of the point</param>
             /// <returns>
-            /// The position the given pixel has on the gradient.
+            /// The position the given point has on the gradient.
             /// The position is not bound to the [0..1] interval.
             /// Values outside of that interval may be treated differently,
             /// e.g. for the <see cref="GradientRepetitionMode" /> enum.
             /// </returns>
-            protected abstract float PositionOnGradient(int x, int y);
+            protected abstract float PositionOnGradient(float x, float y);
 
             private (ColorStop<TPixel> from, ColorStop<TPixel> to) GetGradientSegment(
                 float positionOnCompleteGradient)
diff --git a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
index 765bf5499d..efdc852f28 100644
--- a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
@@ -17,9 +17,9 @@ namespace SixLabors.ImageSharp.Processing
     public sealed class LinearGradientBrush<TPixel> : GradientBrushBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly Point p1;
+        private readonly PointF p1;
 
-        private readonly Point p2;
+        private readonly PointF p2;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="LinearGradientBrush{TPixel}"/> class.
@@ -29,8 +29,8 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="repetitionMode">defines how colors are repeated.</param>
         /// <param name="colorStops"><inheritdoc /></param>
         public LinearGradientBrush(
-            Point p1,
-            Point p2,
+            PointF p1,
+            PointF p2,
             GradientRepetitionMode repetitionMode,
             params ColorStop<TPixel>[] colorStops)
             : base(repetitionMode, colorStops)
@@ -48,9 +48,9 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         private sealed class LinearGradientBrushApplicator : GradientBrushApplicatorBase
         {
-            private readonly Point start;
+            private readonly PointF start;
 
-            private readonly Point end;
+            private readonly PointF end;
 
             /// <summary>
             /// the vector along the gradient, x component
@@ -93,8 +93,8 @@ namespace SixLabors.ImageSharp.Processing
             /// <param name="options">the graphics options</param>
             public LinearGradientBrushApplicator(
                 ImageFrame<TPixel> source,
-                Point start,
-                Point end,
+                PointF start,
+                PointF end,
                 ColorStop<TPixel>[] colorStops,
                 GradientRepetitionMode repetitionMode,
                 GraphicsOptions options)
@@ -116,15 +116,15 @@ namespace SixLabors.ImageSharp.Processing
                 this.length = (float)Math.Sqrt(this.alongsSquared);
             }
 
-            protected override float PositionOnGradient(int x, int y)
+            protected override float PositionOnGradient(float x, float y)
             {
                 if (this.acrossX == 0)
                 {
-                    return (x - this.start.X) / (float)(this.end.X - this.start.X);
+                    return (x - this.start.X) / (this.end.X - this.start.X);
                 }
                 else if (this.acrossY == 0)
                 {
-                    return (y - this.start.Y) / (float)(this.end.Y - this.start.Y);
+                    return (y - this.start.Y) / (this.end.Y - this.start.Y);
                 }
                 else
                 {
diff --git a/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
index 16380fc34b..d33d099931 100644
--- a/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Processing
     public sealed class RadialGradientBrush<TPixel> : GradientBrushBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly Point center;
+        private readonly PointF center;
 
         private readonly float radius;
 
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="repetitionMode">Defines how the colors in the gradient are repeated.</param>
         /// <param name="colorStops">the color stops as defined in base class.</param>
         public RadialGradientBrush(
-            Point center,
+            PointF center,
             float radius,
             GradientRepetitionMode repetitionMode,
             params ColorStop<TPixel>[] colorStops)
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <inheritdoc />
         private sealed class RadialGradientBrushApplicator : GradientBrushApplicatorBase
         {
-            private readonly Point center;
+            private readonly PointF center;
 
             private readonly float radius;
 
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing
             public RadialGradientBrushApplicator(
                 ImageFrame<TPixel> target,
                 GraphicsOptions options,
-                Point center,
+                PointF center,
                 float radius,
                 ColorStop<TPixel>[] colorStops,
                 GradientRepetitionMode repetitionMode)
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.Processing
             /// <param name="x">The X coordinate of the target pixel.</param>
             /// <param name="y">The Y coordinate of the target pixel.</param>
             /// <returns>the position on the color gradient.</returns>
-            protected override float PositionOnGradient(int x, int y)
+            protected override float PositionOnGradient(float x, float y)
             {
                 float distance = (float)Math.Sqrt(Math.Pow(this.center.X - x, 2) + Math.Pow(this.center.Y - y, 2));
                 return distance / this.radius;
diff --git a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
index 0bab2c079b..0f4a98a24a 100644
--- a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
@@ -275,10 +275,6 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 int verticalSign = startY == 0 ? 1 : -1;
                 int horizontalSign = startX == 0 ? 1 : -1;
 
-                // check first and last pixel, these are known:
-                Assert.Equal(red, image[startX, startY]);
-                Assert.Equal(yellow, image[endX, endY]);
-
                 for (int i = 0; i < image.Height; i++)
                 {
                     // it's diagonal, so for any (a, a) on the gradient line, for all (a-x, b+x) - +/- depending on the diagonal direction - must be the same color)
diff --git a/tests/Images/External b/tests/Images/External
index bc2765fb94..94b5a8e11b 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit bc2765fb949d5d4ddba289b29174022bb94646de
+Subproject commit 94b5a8e11b33ba62c15d1d03f1b8b721468764f1

From 3c0d9bb487d9ee58eac2f79858d10effed0601cb Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 7 Apr 2019 20:06:27 +0200
Subject: [PATCH 048/223] PixelConversionModifierExtensions.ApplyCompanding() +
 tests

---
 .../PixelConversionModifiersExtensions.cs     | 18 +++++
 .../Transforms/Resize/ResizeProcessor.cs      |  7 +-
 ...PixelConversionModifiersExtensionsTests.cs | 65 +++++++++++++++++++
 3 files changed, 85 insertions(+), 5 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelConversionModifiersExtensionsTests.cs

diff --git a/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs b/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs
index bf77f85114..529041481f 100644
--- a/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs
+++ b/src/ImageSharp/PixelFormats/PixelConversionModifiersExtensions.cs
@@ -5,6 +5,9 @@ using System.Runtime.CompilerServices;
 
 namespace SixLabors.ImageSharp.PixelFormats
 {
+    /// <summary>
+    /// Extension and utility methods for <see cref="PixelConversionModifiers"/>.
+    /// </summary>
     internal static class PixelConversionModifiersExtensions
     {
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -16,5 +19,20 @@ namespace SixLabors.ImageSharp.PixelFormats
             this PixelConversionModifiers modifiers,
             PixelConversionModifiers removeThis) =>
             modifiers & ~removeThis;
+
+        /// <summary>
+        /// Applies the union of <see cref="PixelConversionModifiers.Scale"/> and <see cref="PixelConversionModifiers.SRgbCompand"/>,
+        /// if <paramref name="compand"/> is true, returns unmodified <paramref name="originalModifiers"/> otherwise.
+        /// </summary>
+        /// <remarks>
+        /// <see cref="PixelConversionModifiers.Scale"/> and <see cref="PixelConversionModifiers.SRgbCompand"/>
+        /// should be always used together!
+        /// </remarks>
+        public static PixelConversionModifiers ApplyCompanding(
+            this PixelConversionModifiers originalModifiers,
+            bool compand) =>
+            compand
+                ? originalModifiers | PixelConversionModifiers.Scale | PixelConversionModifiers.SRgbCompand
+                : originalModifiers;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 2c186a276b..198427d284 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -236,11 +236,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
             int sourceHeight = source.Height;
 
-            PixelConversionModifiers conversionModifiers = PixelConversionModifiers.Premultiply;
-            if (this.Compand)
-            {
-                conversionModifiers |= PixelConversionModifiers.Scale | PixelConversionModifiers.SRgbCompand;
-            }
+            PixelConversionModifiers conversionModifiers =
+                PixelConversionModifiers.Premultiply.ApplyCompanding(this.Compand);
 
             // Interpolate the image using the calculated weights.
             // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelConversionModifiersExtensionsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelConversionModifiersExtensionsTests.cs
new file mode 100644
index 0000000000..e98e14fc62
--- /dev/null
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelConversionModifiersExtensionsTests.cs
@@ -0,0 +1,65 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
+{
+    public class PixelConversionModifiersExtensionsTests
+    {
+        [Theory]
+        [InlineData(PixelConversionModifiers.None, PixelConversionModifiers.None, true)]
+        [InlineData(PixelConversionModifiers.None, PixelConversionModifiers.Premultiply, false)]
+        [InlineData(PixelConversionModifiers.SRgbCompand, PixelConversionModifiers.Premultiply, false)]
+        [InlineData(
+            PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale,
+            PixelConversionModifiers.Premultiply,
+            true)]
+        [InlineData(
+            PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale,
+            PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale,
+            true)]
+        [InlineData(
+            PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale,
+            PixelConversionModifiers.Scale,
+            true)]
+        internal void IsDefined(
+            PixelConversionModifiers baselineModifiers,
+            PixelConversionModifiers checkModifiers,
+            bool expected)
+        {
+            Assert.Equal(expected, baselineModifiers.IsDefined(checkModifiers));
+        }
+
+        [Theory]
+        [InlineData(PixelConversionModifiers.Premultiply | PixelConversionModifiers.Scale | PixelConversionModifiers.SRgbCompand, 
+            PixelConversionModifiers.Scale, PixelConversionModifiers.Premultiply | PixelConversionModifiers.SRgbCompand)]
+        [InlineData(PixelConversionModifiers.None, PixelConversionModifiers.Premultiply, PixelConversionModifiers.None)]
+        internal void Remove(
+            PixelConversionModifiers baselineModifiers,
+            PixelConversionModifiers toRemove,
+            PixelConversionModifiers expected)
+        {
+            PixelConversionModifiers result = baselineModifiers.Remove(toRemove);
+            Assert.Equal(expected, result);
+        }
+
+        [Theory]
+        [InlineData(PixelConversionModifiers.Premultiply, false, PixelConversionModifiers.Premultiply)]
+        [InlineData(PixelConversionModifiers.Premultiply, true, PixelConversionModifiers.Premultiply | PixelConversionModifiers.SRgbCompand | PixelConversionModifiers.Scale)]
+        internal void ApplyCompanding(
+            PixelConversionModifiers baselineModifiers,
+            bool compand,
+            PixelConversionModifiers expected)
+        {
+            PixelConversionModifiers result = baselineModifiers.ApplyCompanding(compand);
+            Assert.Equal(expected, result);
+        }
+    }
+}
\ No newline at end of file

From a1479ee09b57e6d391ae7cc88dfb91605c1c4d57 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 7 Apr 2019 20:29:50 +0200
Subject: [PATCH 049/223] drop FileTestBase usage in ResizeTests

---
 .../Processing/Processors/Transforms/ResizeTests.cs      | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 034b66ae9a..34c9842481 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -15,7 +15,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
-    public class ResizeTests : FileTestBase
+    public class ResizeTests
     {
         public static readonly string[] CommonTestImages = { TestImages.Png.CalliphoraPartial };
 
@@ -31,6 +31,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 nameof(KnownResamplers.Lanczos5),
             };
 
+        private const PixelTypes DefaultPixelType = PixelTypes.Rgba32;
+
+        private const PixelTypes CommonNonDefaultPixelTypes =
+            PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
+
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), nameof(AllResamplerNames), DefaultPixelType, 0.5f, null, null)]
         [WithFileCollection(nameof(CommonTestImages), nameof(SmokeTestResamplerNames), DefaultPixelType, 0.3f, null, null)]
@@ -185,7 +190,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 image.Mutate(x => x.Resize(image.Width / 2, image.Height / 2, KnownResamplers.Bicubic));
 
                 // Comparer fights decoder with gif-s. Could not use CompareToReferenceOutput here :(
-                image.DebugSave(provider, extension: Extensions.Gif);
+                image.DebugSave(provider, extension: "gif");
             }
         }
 

From 03879641929ed1e46e9251d759d72f2d2ce48695 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 7 Apr 2019 23:18:13 +0200
Subject: [PATCH 050/223] introduce [WithBasicTestPatternImages]

---
 .../Processors/Transforms/ResizeTests.cs      | 17 +++++
 .../WithBasicTestPatternImagesAttribute.cs    | 37 +++++++++++
 .../BasicTestPatternProvider.cs               | 65 +++++++++++++++++++
 .../ImageProviders/BlankProvider.cs           |  3 +
 .../ImageProviders/SolidProvider.cs           |  3 +
 .../ImageProviders/TestImageProvider.cs       |  6 ++
 .../ImageProviders/TestPatternProvider.cs     |  5 +-
 .../Tests/TestImageProviderTests.cs           | 14 ++++
 8 files changed, 149 insertions(+), 1 deletion(-)
 create mode 100644 tests/ImageSharp.Tests/TestUtilities/Attributes/WithBasicTestPatternImagesAttribute.cs
 create mode 100644 tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 34c9842481..7f1f5a26a2 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -35,6 +35,23 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         private const PixelTypes CommonNonDefaultPixelTypes =
             PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
+        
+        [Theory]
+        [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32)]
+        public void Resize_BasicSmall<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            // Basic test case, very helpful for debugging
+            // resizing: (15, 12) -> (10, 6)
+            // kernel dimensions: (3, 4)
+
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var destSize = new Size(image.Width * 2 / 3, image.Height / 2);
+                image.Mutate(x => x.Resize(destSize, KnownResamplers.Bicubic, false));
+                image.DebugSave(provider);
+            }
+        }
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), nameof(AllResamplerNames), DefaultPixelType, 0.5f, null, null)]
diff --git a/tests/ImageSharp.Tests/TestUtilities/Attributes/WithBasicTestPatternImagesAttribute.cs b/tests/ImageSharp.Tests/TestUtilities/Attributes/WithBasicTestPatternImagesAttribute.cs
new file mode 100644
index 0000000000..1e4324e046
--- /dev/null
+++ b/tests/ImageSharp.Tests/TestUtilities/Attributes/WithBasicTestPatternImagesAttribute.cs
@@ -0,0 +1,37 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Reflection;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public class WithBasicTestPatternImagesAttribute : ImageDataAttributeBase
+    {
+        public WithBasicTestPatternImagesAttribute(int width, int height, PixelTypes pixelTypes, params object[] additionalParameters)
+            : this(null, width, height, pixelTypes, additionalParameters)
+        {
+        }
+
+        public WithBasicTestPatternImagesAttribute(string memberData, int width, int height, PixelTypes pixelTypes, params object[] additionalParameters)
+            : base(memberData, pixelTypes, additionalParameters)
+        {
+            this.Width = width;
+            this.Height = height;
+        }
+
+        /// <summary>
+        /// Gets the width
+        /// </summary>
+        public int Width { get; }
+
+        /// <summary>
+        /// Gets the height
+        /// </summary>
+        public int Height { get; }
+
+        protected override string GetFactoryMethodName(MethodInfo testMethod) => "BasicTestPattern";
+
+        protected override object[] GetFactoryMethodArgs(MethodInfo testMethod, Type factoryType) => new object[] { this.Width, this.Height };
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
new file mode 100644
index 0000000000..47bb22aeb3
--- /dev/null
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
@@ -0,0 +1,65 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public abstract partial class TestImageProvider<TPixel>
+    {
+        private class BasicTestPatternProvider : BlankProvider
+        {
+            public BasicTestPatternProvider(int width, int height)
+                : base(width, height)
+            {
+            }
+
+            /// <summary>
+            /// This parameterless constructor is needed for xUnit deserialization
+            /// </summary>
+            public BasicTestPatternProvider()
+            {
+            }
+
+            public override string SourceFileOrDescription => TestUtils.AsInvariantString($"BasicTestPattern{this.Width}x{this.Height}");
+
+            public override Image<TPixel> GetImage()
+            {
+                var result = new Image<TPixel>(this.Width, this.Height);
+
+                TPixel topLeftColor = NamedColors<TPixel>.Red;
+                TPixel topRightColor = NamedColors<TPixel>.Green;
+                TPixel bottomLeftColor = NamedColors<TPixel>.Blue;
+
+                // Transparent purple:
+                TPixel bottomRightColor = default;
+                bottomRightColor.FromVector4(new Vector4(1f, 0f, 1f, 0.5f));
+
+                int midY = this.Height / 2;
+                int midX = this.Width / 2;
+
+                for (int y = 0; y < midY; y++)
+                {
+                    Span<TPixel> row = result.GetPixelRowSpan(y);
+
+                    row.Slice(0, midX).Fill(topLeftColor);
+                    row.Slice(midX, this.Width-midX).Fill(topRightColor);
+                }
+
+                for (int y = midY; y < this.Height; y++)
+                {
+                    Span<TPixel> row = result.GetPixelRowSpan(y);
+
+                    row.Slice(0, midX).Fill(bottomLeftColor);
+                    row.Slice(midX, this.Width-midX).Fill(bottomRightColor);
+                }
+
+                return result;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
index 7821d0b51a..1275e522f8 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
@@ -20,6 +20,9 @@ namespace SixLabors.ImageSharp.Tests
                 this.Height = height;
             }
 
+            /// <summary>
+            /// This parameterless constructor is needed for xUnit deserialization
+            /// </summary>
             public BlankProvider()
             {
                 this.Width = 100;
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
index d68c37a768..1ff95f60d0 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
@@ -35,6 +35,9 @@ namespace SixLabors.ImageSharp.Tests
                 this.a = a;
             }
 
+            /// <summary>
+            /// This parameterless constructor is needed for xUnit deserialization
+            /// </summary>
             public SolidProvider()
                 : base()
             {
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
index 5b5e4740a3..52f66a78b5 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
@@ -44,6 +44,12 @@ namespace SixLabors.ImageSharp.Tests
         public string MethodName { get; private set; }
         public string OutputSubfolderName { get; private set; }
 
+        public static TestImageProvider<TPixel> BasicTestPattern(int width,
+                                                                 int height,
+                                                                 MethodInfo testMethod = null,
+                                                                 PixelTypes pixelTypeOverride = PixelTypes.Undefined)
+            => new BasicTestPatternProvider(width, height).Init(testMethod, pixelTypeOverride);
+
         public static TestImageProvider<TPixel> TestPattern(
                 int width,
                 int height,
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
index 17e5369d48..336cdbf11f 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Net.Mime;
 using System.Numerics;
 
 using SixLabors.ImageSharp.Memory;
@@ -25,8 +26,10 @@ namespace SixLabors.ImageSharp.Tests
             {
             }
 
+            /// <summary>
+            /// This parameterless constructor is needed for xUnit deserialization
+            /// </summary>
             public TestPatternProvider()
-                : base()
             {
             }
 
diff --git a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
index cac7828e96..1bee34f1a7 100644
--- a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
@@ -325,6 +325,20 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
+        [Theory]
+        [WithBasicTestPatternImages(50, 100, PixelTypes.Rgba32)]
+        [WithBasicTestPatternImages(49,17, PixelTypes.Rgba32)]
+        [WithBasicTestPatternImages(20, 10, PixelTypes.Rgba32)]
+        public void Use_WithBasicTestPatternImages<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> img = provider.GetImage())
+            {
+                img.DebugSave(provider);
+            }
+        }
+
+
         public static readonly TheoryData<object> BasicData = new TheoryData<object>()
         {
             TestImageProvider<Rgba32>.Blank(10, 20),

From 1f12fd810459de32ee68923d9d7ac3befc665411 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 8 Apr 2019 00:41:18 +0200
Subject: [PATCH 051/223] drop parallelism in ResizeProcessor for simplicity

---
 .../Transforms/Resize/ResizeProcessor.cs      | 72 ++++++++-----------
 1 file changed, 29 insertions(+), 43 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 198427d284..37d0ab413a 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
@@ -244,63 +245,48 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             // First process the columns. Since we are not using multiple threads startY and endY
             // are the upper and lower bounds of the source rectangle.
             using (Buffer2D<Vector4> firstPassPixelsTransposed = source.MemoryAllocator.Allocate2D<Vector4>(sourceHeight, width))
+            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(Math.Max(source.Width, width)))
             {
                 firstPassPixelsTransposed.MemorySource.Clear();
 
-                var processColsRect = new Rectangle(0, 0, source.Width, sourceRectangle.Bottom);
+                for (int y = 0; y < sourceRectangle.Bottom; y++)
+                {
+                    Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(sourceX);
+                    Span<Vector4> tempRowSpan = tempBuffer.GetSpan().Slice(sourceX, source.Width - sourceX);
 
-                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
-                    processColsRect,
-                    configuration,
-                    (rows, tempRowBuffer) =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(sourceX);
-                            Span<Vector4> tempRowSpan = tempRowBuffer.Span.Slice(sourceX);
-
-                            PixelOperations<TPixel>.Instance.ToVector4(configuration, sourceRow, tempRowSpan, conversionModifiers);
-
-                            ref Vector4 firstPassBaseRef = ref firstPassPixelsTransposed.Span[y];
+                    PixelOperations<TPixel>.Instance.ToVector4(configuration, sourceRow, tempRowSpan, conversionModifiers);
 
-                            for (int x = minX; x < maxX; x++)
-                            {
-                                ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - startX);
-                                Unsafe.Add(ref firstPassBaseRef, x * sourceHeight) = kernel.Convolve(tempRowSpan);
-                            }
-                        }
-                    });
+                    ref Vector4 firstPassBaseRef = ref firstPassPixelsTransposed.Span[y];
 
-                var processRowsRect = Rectangle.FromLTRB(0, minY, width, maxY);
+                    for (int x = minX; x < maxX; x++)
+                    {
+                        ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - startX);
+                        Unsafe.Add(ref firstPassBaseRef, x * sourceHeight) = kernel.Convolve(tempRowSpan);
+                    }
+                }
 
                 // Now process the rows.
-                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
-                    processRowsRect,
-                    configuration,
-                    (rows, tempRowBuffer) =>
-                    {
-                        Span<Vector4> tempRowSpan = tempRowBuffer.Span;
+                Span<Vector4> tempColSpan = tempBuffer.GetSpan().Slice(0, width);
 
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            // Ensure offsets are normalized for cropping and padding.
-                            ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
+                for (int y = minY; y < maxY; y++)
+                {
+                    // Ensure offsets are normalized for cropping and padding.
+                    ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
-                            ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempRowSpan);
+                    ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
 
-                            for (int x = 0; x < width; x++)
-                            {
-                                Span<Vector4> firstPassColumn = firstPassPixelsTransposed.GetRowSpan(x).Slice(sourceY);
+                    for (int x = 0; x < width; x++)
+                    {
+                        Span<Vector4> firstPassColumn = firstPassPixelsTransposed.GetRowSpan(x).Slice(sourceY);
 
-                                // Destination color components
-                                Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
-                            }
+                        // Destination color components
+                        Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
+                    }
 
-                            Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
+                    Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
 
-                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempRowSpan, targetRowSpan, conversionModifiers);
-                        }
-                    });
+                    PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempColSpan, targetRowSpan, conversionModifiers);
+                }
             }
         }
 

From 0786ff70d3ecca6a1ed31354cd04816865753681 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 8 Apr 2019 00:59:24 +0200
Subject: [PATCH 052/223] ResizeRectangle -> TargetRectangle

---
 .../Transforms/Resize/ResizeProcessor.cs      | 32 +++++++++----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 37d0ab413a..cb1ab2d546 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -66,7 +66,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.Sampler = options.Sampler;
             this.Width = size.Width;
             this.Height = size.Height;
-            this.ResizeRectangle = rectangle;
+            this.TargetRectangle = rectangle;
             this.Compand = options.Compand;
         }
 
@@ -89,11 +89,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <param name="width">The target width.</param>
         /// <param name="height">The target height.</param>
         /// <param name="sourceSize">The source image size</param>
-        /// <param name="resizeRectangle">
+        /// <param name="targetRectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
         /// </param>
         /// <param name="compand">Whether to compress or expand individual pixel color values on processing.</param>
-        public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize, Rectangle resizeRectangle, bool compand)
+        public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize, Rectangle targetRectangle, bool compand)
         {
             Guard.NotNull(sampler, nameof(sampler));
 
@@ -104,13 +104,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             if (width == 0 && height > 0)
             {
                 width = (int)MathF.Max(min, MathF.Round(sourceSize.Width * height / (float)sourceSize.Height));
-                resizeRectangle.Width = width;
+                targetRectangle.Width = width;
             }
 
             if (height == 0 && width > 0)
             {
                 height = (int)MathF.Max(min, MathF.Round(sourceSize.Height * width / (float)sourceSize.Width));
-                resizeRectangle.Height = height;
+                targetRectangle.Height = height;
             }
 
             Guard.MustBeGreaterThan(width, 0, nameof(width));
@@ -119,7 +119,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.Sampler = sampler;
             this.Width = width;
             this.Height = height;
-            this.ResizeRectangle = resizeRectangle;
+            this.TargetRectangle = targetRectangle;
             this.Compand = compand;
         }
 
@@ -141,7 +141,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <summary>
         /// Gets the resize rectangle.
         /// </summary>
-        public Rectangle ResizeRectangle { get; }
+        public Rectangle TargetRectangle { get; }
 
         /// <summary>
         /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
@@ -167,13 +167,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 MemoryAllocator memoryAllocator = source.GetMemoryAllocator();
                 this.horizontalKernelMap = ResizeKernelMap.Calculate(
                     this.Sampler,
-                    this.ResizeRectangle.Width,
+                    this.TargetRectangle.Width,
                     sourceRectangle.Width,
                     memoryAllocator);
 
                 this.verticalKernelMap = ResizeKernelMap.Calculate(
                     this.Sampler,
-                    this.ResizeRectangle.Height,
+                    this.TargetRectangle.Height,
                     sourceRectangle.Height,
                     memoryAllocator);
             }
@@ -183,7 +183,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
         {
             // Handle resize dimensions identical to the original
-            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.ResizeRectangle)
+            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.TargetRectangle)
             {
                 // The cloned will be blank here copy all the pixel data over
                 source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
@@ -194,10 +194,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int height = this.Height;
             int sourceX = sourceRectangle.X;
             int sourceY = sourceRectangle.Y;
-            int startY = this.ResizeRectangle.Y;
-            int endY = this.ResizeRectangle.Bottom;
-            int startX = this.ResizeRectangle.X;
-            int endX = this.ResizeRectangle.Right;
+            int startY = this.TargetRectangle.Y;
+            int endY = this.TargetRectangle.Bottom;
+            int startX = this.TargetRectangle.X;
+            int endX = this.TargetRectangle.Right;
 
             int minX = Math.Max(0, startX);
             int maxX = Math.Min(width, endX);
@@ -209,8 +209,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
 
                 // Scaling factors
-                float widthFactor = sourceRectangle.Width / (float)this.ResizeRectangle.Width;
-                float heightFactor = sourceRectangle.Height / (float)this.ResizeRectangle.Height;
+                float widthFactor = sourceRectangle.Width / (float)this.TargetRectangle.Width;
+                float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
 
                 ParallelHelper.IterateRows(
                     workingRect,

From fca697206ab49829f9da59cb5f65321922a3e04f Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Fri, 12 Apr 2019 23:37:17 -0500
Subject: [PATCH 053/223] Update metadata names (#879)

---
 .../Common/Helpers/UnitConverter.cs           |   4 +-
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  |  26 ++--
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  |  26 ++--
 src/ImageSharp/Formats/Bmp/BmpFormat.cs       |   4 +-
 src/ImageSharp/Formats/Bmp/BmpMetaData.cs     |  12 +-
 src/ImageSharp/Formats/Gif/GifDecoder.cs      |   2 +-
 src/ImageSharp/Formats/Gif/GifDecoderCore.cs  |  34 ++---
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  |  60 ++++----
 src/ImageSharp/Formats/Gif/GifFormat.cs       |   6 +-
 .../Formats/Gif/GifFrameMetaData.cs           |  12 +-
 src/ImageSharp/Formats/Gif/GifMetaData.cs     |  12 +-
 .../Formats/Gif/IGifDecoderOptions.cs         |   2 +-
 src/ImageSharp/Formats/IImageFormat.cs        |  24 ++--
 .../Jpeg/Components/Decoder/JFifMarker.cs     |   2 +-
 .../Formats/Jpeg/JpegDecoderCore.cs           |  44 +++---
 .../Formats/Jpeg/JpegEncoderCore.cs           |  30 ++--
 src/ImageSharp/Formats/Jpeg/JpegFormat.cs     |   4 +-
 src/ImageSharp/Formats/Jpeg/JpegMetaData.cs   |  12 +-
 .../Formats/Png/Chunks/PhysicalChunkData.cs   |   4 +-
 src/ImageSharp/Formats/Png/PngDecoderCore.cs  | 128 +++++++++---------
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |  54 ++++----
 src/ImageSharp/Formats/Png/PngFormat.cs       |   4 +-
 src/ImageSharp/Formats/Png/PngMetaData.cs     |  12 +-
 src/ImageSharp/IImageInfo.cs                  |   4 +-
 src/ImageSharp/Image.Decode.cs                |   6 +-
 src/ImageSharp/Image.WrapMemory.cs            |  18 +--
 src/ImageSharp/ImageFrameCollection.cs        |   4 +-
 src/ImageSharp/ImageFrame{TPixel}.cs          |  42 +++---
 src/ImageSharp/ImageInfo.cs                   |  10 +-
 src/ImageSharp/Image{TPixel}.cs               |  28 ++--
 src/ImageSharp/MetaData/FrameDecodingMode.cs  |   2 +-
 src/ImageSharp/MetaData/ImageFrameMetaData.cs |  42 +++---
 src/ImageSharp/MetaData/ImageMetaData.cs      |  44 +++---
 src/ImageSharp/MetaData/ImageProperty.cs      |   2 +-
 .../MetaData/PixelResolutionUnit.cs           |   2 +-
 .../MetaData/Profiles/Exif/ExifConstants.cs   |   2 +-
 .../MetaData/Profiles/Exif/ExifDataType.cs    |   2 +-
 .../MetaData/Profiles/Exif/ExifParts.cs       |   2 +-
 .../MetaData/Profiles/Exif/ExifProfile.cs     |  12 +-
 .../MetaData/Profiles/Exif/ExifReader.cs      |   2 +-
 .../MetaData/Profiles/Exif/ExifTag.cs         |   2 +-
 .../Exif/ExifTagDescriptionAttribute.cs       |   2 +-
 .../MetaData/Profiles/Exif/ExifTags.cs        |   4 +-
 .../MetaData/Profiles/Exif/ExifValue.cs       |   2 +-
 .../MetaData/Profiles/Exif/ExifWriter.cs      |   2 +-
 .../Profiles/ICC/Curves/IccCurveSegment.cs    |   2 +-
 .../ICC/Curves/IccFormulaCurveElement.cs      |   2 +-
 .../ICC/Curves/IccOneDimensionalCurve.cs      |   2 +-
 .../Profiles/ICC/Curves/IccParametricCurve.cs |   2 +-
 .../Profiles/ICC/Curves/IccResponseCurve.cs   |   2 +-
 .../ICC/Curves/IccSampledCurveElement.cs      |   2 +-
 .../ICC/DataReader/IccDataReader.Curves.cs    |   2 +-
 .../ICC/DataReader/IccDataReader.Lut.cs       |   2 +-
 .../ICC/DataReader/IccDataReader.Matrix.cs    |   2 +-
 .../IccDataReader.MultiProcessElement.cs      |   2 +-
 .../DataReader/IccDataReader.NonPrimitives.cs |   2 +-
 .../DataReader/IccDataReader.Primitives.cs    |   2 +-
 .../DataReader/IccDataReader.TagDataEntry.cs  |   2 +-
 .../Profiles/ICC/DataReader/IccDataReader.cs  |   2 +-
 .../ICC/DataWriter/IccDataWriter.Curves.cs    |   2 +-
 .../ICC/DataWriter/IccDataWriter.Lut.cs       |   2 +-
 .../ICC/DataWriter/IccDataWriter.Matrix.cs    |   2 +-
 .../IccDataWriter.MultiProcessElement.cs      |   2 +-
 .../DataWriter/IccDataWriter.NonPrimitives.cs |   2 +-
 .../DataWriter/IccDataWriter.Primitives.cs    |   2 +-
 .../DataWriter/IccDataWriter.TagDataEntry.cs  |   2 +-
 .../Profiles/ICC/DataWriter/IccDataWriter.cs  |   2 +-
 .../Profiles/ICC/Enums/IccClutDataType.cs     |   2 +-
 .../Profiles/ICC/Enums/IccColorSpaceType.cs   |   2 +-
 .../Profiles/ICC/Enums/IccColorantEncoding.cs |   2 +-
 .../ICC/Enums/IccCurveMeasurementEncodings.cs |   2 +-
 .../ICC/Enums/IccCurveSegmentSignature.cs     |   2 +-
 .../Profiles/ICC/Enums/IccDataType.cs         |   2 +-
 .../Profiles/ICC/Enums/IccDeviceAttribute.cs  |   2 +-
 .../Profiles/ICC/Enums/IccFormulaCurveType.cs |   2 +-
 .../ICC/Enums/IccMeasurementGeometry.cs       |   2 +-
 .../Enums/IccMultiProcessElementSignature.cs  |   2 +-
 .../ICC/Enums/IccParametricCurveType.cs       |   2 +-
 .../ICC/Enums/IccPrimaryPlatformType.cs       |   2 +-
 .../Profiles/ICC/Enums/IccProfileClass.cs     |   2 +-
 .../Profiles/ICC/Enums/IccProfileFlag.cs      |   2 +-
 .../Profiles/ICC/Enums/IccProfileTag.cs       |   2 +-
 .../Profiles/ICC/Enums/IccRenderingIntent.cs  |   2 +-
 .../Profiles/ICC/Enums/IccScreeningFlag.cs    |   2 +-
 .../ICC/Enums/IccScreeningSpotType.cs         |   2 +-
 .../Profiles/ICC/Enums/IccSignatureName.cs    |   2 +-
 .../ICC/Enums/IccStandardIlluminant.cs        |   2 +-
 .../Profiles/ICC/Enums/IccStandardObserver.cs |   2 +-
 .../Profiles/ICC/Enums/IccTypeSignature.cs    |   2 +-
 .../Exceptions/InvalidIccProfileException.cs  |   2 +-
 .../MetaData/Profiles/ICC/IccProfile.cs       |   2 +-
 .../MetaData/Profiles/ICC/IccProfileHeader.cs |   2 +-
 .../MetaData/Profiles/ICC/IccReader.cs        |   2 +-
 .../MetaData/Profiles/ICC/IccTagDataEntry.cs  |   2 +-
 .../MetaData/Profiles/ICC/IccWriter.cs        |   2 +-
 .../IccBAcsProcessElement.cs                  |   2 +-
 .../IccClutProcessElement.cs                  |   2 +-
 .../IccCurveSetProcessElement.cs              |   2 +-
 .../IccEAcsProcessElement.cs                  |   2 +-
 .../IccMatrixProcessElement.cs                |   2 +-
 .../IccMultiProcessElement.cs                 |   2 +-
 .../IccChromaticityTagDataEntry.cs            |   2 +-
 .../IccColorantOrderTagDataEntry.cs           |   2 +-
 .../IccColorantTableTagDataEntry.cs           |   2 +-
 .../TagDataEntries/IccCrdInfoTagDataEntry.cs  |   2 +-
 .../TagDataEntries/IccCurveTagDataEntry.cs    |   2 +-
 .../ICC/TagDataEntries/IccDataTagDataEntry.cs |   2 +-
 .../TagDataEntries/IccDateTimeTagDataEntry.cs |   2 +-
 .../IccFix16ArrayTagDataEntry.cs              |   2 +-
 .../TagDataEntries/IccLut16TagDataEntry.cs    |   2 +-
 .../ICC/TagDataEntries/IccLut8TagDataEntry.cs |   2 +-
 .../TagDataEntries/IccLutAToBTagDataEntry.cs  |   2 +-
 .../TagDataEntries/IccLutBToATagDataEntry.cs  |   2 +-
 .../IccMeasurementTagDataEntry.cs             |   2 +-
 .../IccMultiLocalizedUnicodeTagDataEntry.cs   |   2 +-
 .../IccMultiProcessElementsTagDataEntry.cs    |   2 +-
 .../IccNamedColor2TagDataEntry.cs             |   2 +-
 .../IccParametricCurveTagDataEntry.cs         |   2 +-
 .../IccProfileSequenceDescTagDataEntry.cs     |   2 +-
 ...ccProfileSequenceIdentifierTagDataEntry.cs |   2 +-
 .../IccResponseCurveSet16TagDataEntry.cs      |   2 +-
 .../IccScreeningTagDataEntry.cs               |   2 +-
 .../IccSignatureTagDataEntry.cs               |   2 +-
 .../IccTextDescriptionTagDataEntry.cs         |   2 +-
 .../ICC/TagDataEntries/IccTextTagDataEntry.cs |   2 +-
 .../IccUFix16ArrayTagDataEntry.cs             |   2 +-
 .../IccUInt16ArrayTagDataEntry.cs             |   2 +-
 .../IccUInt32ArrayTagDataEntry.cs             |   2 +-
 .../IccUInt64ArrayTagDataEntry.cs             |   2 +-
 .../IccUInt8ArrayTagDataEntry.cs              |   2 +-
 .../TagDataEntries/IccUcrBgTagDataEntry.cs    |   2 +-
 .../TagDataEntries/IccUnknownTagDataEntry.cs  |   2 +-
 .../IccViewingConditionsTagDataEntry.cs       |   2 +-
 .../ICC/TagDataEntries/IccXyzTagDataEntry.cs  |   2 +-
 .../MetaData/Profiles/ICC/Various/IccClut.cs  |   2 +-
 .../ICC/Various/IccColorantTableEntry.cs      |   2 +-
 .../ICC/Various/IccLocalizedString.cs         |   2 +-
 .../MetaData/Profiles/ICC/Various/IccLut.cs   |   2 +-
 .../Profiles/ICC/Various/IccNamedColor.cs     |   2 +-
 .../Profiles/ICC/Various/IccPositionNumber.cs |   2 +-
 .../ICC/Various/IccProfileDescription.cs      |   2 +-
 .../Profiles/ICC/Various/IccProfileId.cs      |   2 +-
 .../Various/IccProfileSequenceIdentifier.cs   |   2 +-
 .../Profiles/ICC/Various/IccResponseNumber.cs |   2 +-
 .../ICC/Various/IccScreeningChannel.cs        |   2 +-
 .../Profiles/ICC/Various/IccTagTableEntry.cs  |   2 +-
 .../Profiles/ICC/Various/IccVersion.cs        |   2 +-
 .../Transforms/AffineTransformProcessor.cs    |   4 +-
 .../Transforms/AutoOrientProcessor.cs         |  10 +-
 .../Processors/Transforms/CropProcessor.cs    |   4 +-
 .../ProjectiveTransformProcessor.cs           |   4 +-
 .../Transforms/Resize/ResizeProcessor.cs      |   4 +-
 .../Processors/Transforms/RotateProcessor.cs  |   4 +-
 .../Transforms/TransformProcessorHelpers.cs   |   4 +-
 .../Formats/Bmp/BmpDecoderTests.cs            |   4 +-
 .../Formats/Bmp/BmpEncoderTests.cs            |   6 +-
 .../Formats/Bmp/BmpMetaDataTests.cs           |   4 +-
 .../Formats/GeneralFormatTests.cs             |   4 +-
 .../Formats/Gif/GifDecoderTests.cs            |  20 +--
 .../Formats/Gif/GifEncoderTests.cs            |  34 ++---
 .../Formats/Gif/GifFrameMetaDataTests.cs      |   4 +-
 .../Formats/Gif/GifMetaDataTests.cs           |   4 +-
 .../Formats/Jpg/JFifMarkerTests.cs            |   2 +-
 .../Formats/Jpg/JpegDecoderTests.MetaData.cs  |  34 ++---
 .../Formats/Jpg/JpegEncoderTests.cs           |   6 +-
 .../Formats/Jpg/JpegMetaDataTests.cs          |   4 +-
 .../Formats/Png/PngDecoderTests.cs            |  18 +--
 .../Formats/Png/PngEncoderTests.cs            |  10 +-
 .../Formats/Png/PngMetaDataTests.cs           |   4 +-
 .../Image/ImageTests.WrapMemory.cs            |   6 +-
 tests/ImageSharp.Tests/Image/ImageTests.cs    |   6 +-
 tests/ImageSharp.Tests/ImageInfoTests.cs      |   6 +-
 .../MetaData/ImageFrameMetaDataTests.cs       |  16 +--
 .../MetaData/ImageMetaDataTests.cs            |  32 ++---
 .../MetaData/ImagePropertyTests.cs            |   2 +-
 .../Profiles/Exif/ExifProfileTests.cs         | 104 +++++++-------
 .../MetaData/Profiles/Exif/ExifReaderTests.cs |   2 +-
 .../Exif/ExifTagDescriptionAttributeTests.cs  |   2 +-
 .../MetaData/Profiles/Exif/ExifValueTests.cs  |   4 +-
 .../DataReader/IccDataReader.CurvesTests.cs   |   2 +-
 .../ICC/DataReader/IccDataReader.LutTests.cs  |   2 +-
 .../DataReader/IccDataReader.MatrixTests.cs   |   2 +-
 .../IccDataReader.MultiProcessElementTests.cs |   2 +-
 .../IccDataReader.NonPrimitivesTests.cs       |   2 +-
 .../IccDataReader.PrimitivesTests.cs          |   2 +-
 .../IccDataReader.TagDataEntryTests.cs        |   2 +-
 .../ICC/DataReader/IccDataReaderTests.cs      |   2 +-
 .../DataWriter/IccDataWriter.CurvesTests.cs   |   2 +-
 .../ICC/DataWriter/IccDataWriter.LutTests.cs  |   2 +-
 .../DataWriter/IccDataWriter.MatrixTests.cs   |   2 +-
 .../IccDataWriter.MultiProcessElementTests.cs |   2 +-
 .../IccDataWriter.NonPrimitivesTests.cs       |   2 +-
 .../IccDataWriter.PrimitivesTests.cs          |   2 +-
 .../IccDataWriter.TagDataEntryTests.cs        |   2 +-
 .../ICC/DataWriter/IccDataWriterTests.cs      |   2 +-
 .../MetaData/Profiles/ICC/IccProfileTests.cs  |   2 +-
 .../MetaData/Profiles/ICC/IccReaderTests.cs   |   2 +-
 .../MetaData/Profiles/ICC/IccWriterTests.cs   |   2 +-
 .../Profiles/ICC/Various/IccProfileIdTests.cs |   2 +-
 .../Processors/Transforms/AutoOrientTests.cs  |   8 +-
 .../Transforms/TransformsHelpersTest.cs       |   4 +-
 .../TestDataIcc/IccTestDataCurves.cs          |   2 +-
 .../TestDataIcc/IccTestDataLut.cs             |   2 +-
 .../IccTestDataMultiProcessElements.cs        |   2 +-
 .../TestDataIcc/IccTestDataNonPrimitives.cs   |   2 +-
 .../TestDataIcc/IccTestDataProfiles.cs        |   2 +-
 .../TestDataIcc/IccTestDataTagDataEntry.cs    |   2 +-
 .../SystemDrawingReferenceDecoder.cs          |   4 +-
 208 files changed, 699 insertions(+), 699 deletions(-)

diff --git a/src/ImageSharp/Common/Helpers/UnitConverter.cs b/src/ImageSharp/Common/Helpers/UnitConverter.cs
index c8b25bf564..75dbb032c5 100644
--- a/src/ImageSharp/Common/Helpers/UnitConverter.cs
+++ b/src/ImageSharp/Common/Helpers/UnitConverter.cs
@@ -2,8 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Runtime.CompilerServices;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 
 namespace SixLabors.ImageSharp.Common.Helpers
 {
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index d33ada2864..b52c3754e2 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -9,7 +9,7 @@ using System.Numerics;
 using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
@@ -66,12 +66,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <summary>
         /// The metadata.
         /// </summary>
-        private ImageMetaData metaData;
+        private ImageMetadata metadata;
 
         /// <summary>
         /// The bmp specific metadata.
         /// </summary>
-        private BmpMetaData bmpMetaData;
+        private BmpMetadata bmpMetadata;
 
         /// <summary>
         /// The file header containing general information.
@@ -116,7 +116,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             {
                 int bytesPerColorMapEntry = this.ReadImageHeaders(stream, out bool inverted, out byte[] palette);
 
-                var image = new Image<TPixel>(this.configuration, this.infoHeader.Width, this.infoHeader.Height, this.metaData);
+                var image = new Image<TPixel>(this.configuration, this.infoHeader.Width, this.infoHeader.Height, this.metadata);
 
                 Buffer2D<TPixel> pixels = image.GetRootFramePixelBuffer();
 
@@ -125,7 +125,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     case BmpCompression.RGB:
                         if (this.infoHeader.BitsPerPixel == 32)
                         {
-                            if (this.bmpMetaData.InfoHeaderType == BmpInfoHeaderType.WinVersion3)
+                            if (this.bmpMetadata.InfoHeaderType == BmpInfoHeaderType.WinVersion3)
                             {
                                 this.ReadRgb32Slow(pixels, this.infoHeader.Width, this.infoHeader.Height, inverted);
                             }
@@ -188,7 +188,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         public IImageInfo Identify(Stream stream)
         {
             this.ReadImageHeaders(stream, out _, out _);
-            return new ImageInfo(new PixelTypeInfo(this.infoHeader.BitsPerPixel), this.infoHeader.Width, this.infoHeader.Height, this.metaData);
+            return new ImageInfo(new PixelTypeInfo(this.infoHeader.BitsPerPixel), this.infoHeader.Width, this.infoHeader.Height, this.metadata);
         }
 
         /// <summary>
@@ -999,7 +999,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             }
 
             // Resolution is stored in PPM.
-            var meta = new ImageMetaData
+            var meta = new ImageMetadata
             {
                 ResolutionUnits = PixelResolutionUnit.PixelsPerMeter
             };
@@ -1011,21 +1011,21 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             else
             {
                 // Convert default metadata values to PPM.
-                meta.HorizontalResolution = Math.Round(UnitConverter.InchToMeter(ImageMetaData.DefaultHorizontalResolution));
-                meta.VerticalResolution = Math.Round(UnitConverter.InchToMeter(ImageMetaData.DefaultVerticalResolution));
+                meta.HorizontalResolution = Math.Round(UnitConverter.InchToMeter(ImageMetadata.DefaultHorizontalResolution));
+                meta.VerticalResolution = Math.Round(UnitConverter.InchToMeter(ImageMetadata.DefaultVerticalResolution));
             }
 
-            this.metaData = meta;
+            this.metadata = meta;
 
             short bitsPerPixel = this.infoHeader.BitsPerPixel;
-            this.bmpMetaData = this.metaData.GetFormatMetaData(BmpFormat.Instance);
-            this.bmpMetaData.InfoHeaderType = infoHeaderType;
+            this.bmpMetadata = this.metadata.GetFormatMetadata(BmpFormat.Instance);
+            this.bmpMetadata.InfoHeaderType = infoHeaderType;
 
             // We can only encode at these bit rates so far.
             if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel32))
             {
-                this.bmpMetaData.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
+                this.bmpMetadata.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
             }
 
             // skip the remaining header because we can't read those parts
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 27a38bc0d1..ad526f6689 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -7,7 +7,7 @@ using System.IO;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
@@ -73,9 +73,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             Guard.NotNull(stream, nameof(stream));
 
             this.configuration = image.GetConfiguration();
-            ImageMetaData metaData = image.MetaData;
-            BmpMetaData bmpMetaData = metaData.GetFormatMetaData(BmpFormat.Instance);
-            this.bitsPerPixel = this.bitsPerPixel ?? bmpMetaData.BitsPerPixel;
+            ImageMetadata metadata = image.Metadata;
+            BmpMetadata bmpMetadata = metadata.GetFormatMetadata(BmpFormat.Instance);
+            this.bitsPerPixel = this.bitsPerPixel ?? bmpMetadata.BitsPerPixel;
 
             short bpp = (short)this.bitsPerPixel;
             int bytesPerLine = 4 * (((image.Width * bpp) + 31) / 32);
@@ -85,27 +85,27 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             int hResolution = 0;
             int vResolution = 0;
 
-            if (metaData.ResolutionUnits != PixelResolutionUnit.AspectRatio)
+            if (metadata.ResolutionUnits != PixelResolutionUnit.AspectRatio)
             {
-                if (metaData.HorizontalResolution > 0 && metaData.VerticalResolution > 0)
+                if (metadata.HorizontalResolution > 0 && metadata.VerticalResolution > 0)
                 {
-                    switch (metaData.ResolutionUnits)
+                    switch (metadata.ResolutionUnits)
                     {
                         case PixelResolutionUnit.PixelsPerInch:
 
-                            hResolution = (int)Math.Round(UnitConverter.InchToMeter(metaData.HorizontalResolution));
-                            vResolution = (int)Math.Round(UnitConverter.InchToMeter(metaData.VerticalResolution));
+                            hResolution = (int)Math.Round(UnitConverter.InchToMeter(metadata.HorizontalResolution));
+                            vResolution = (int)Math.Round(UnitConverter.InchToMeter(metadata.VerticalResolution));
                             break;
 
                         case PixelResolutionUnit.PixelsPerCentimeter:
 
-                            hResolution = (int)Math.Round(UnitConverter.CmToMeter(metaData.HorizontalResolution));
-                            vResolution = (int)Math.Round(UnitConverter.CmToMeter(metaData.VerticalResolution));
+                            hResolution = (int)Math.Round(UnitConverter.CmToMeter(metadata.HorizontalResolution));
+                            vResolution = (int)Math.Round(UnitConverter.CmToMeter(metadata.VerticalResolution));
                             break;
 
                         case PixelResolutionUnit.PixelsPerMeter:
-                            hResolution = (int)Math.Round(metaData.HorizontalResolution);
-                            vResolution = (int)Math.Round(metaData.VerticalResolution);
+                            hResolution = (int)Math.Round(metadata.HorizontalResolution);
+                            vResolution = (int)Math.Round(metadata.VerticalResolution);
 
                             break;
                     }
diff --git a/src/ImageSharp/Formats/Bmp/BmpFormat.cs b/src/ImageSharp/Formats/Bmp/BmpFormat.cs
index a5eaab8ebf..056fbe8406 100644
--- a/src/ImageSharp/Formats/Bmp/BmpFormat.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpFormat.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Registers the image encoders, decoders and mime type detectors for the bmp format.
     /// </summary>
-    public sealed class BmpFormat : IImageFormat<BmpMetaData>
+    public sealed class BmpFormat : IImageFormat<BmpMetadata>
     {
         private BmpFormat()
         {
@@ -32,6 +32,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         public IEnumerable<string> FileExtensions => BmpConstants.FileExtensions;
 
         /// <inheritdoc/>
-        public BmpMetaData CreateDefaultFormatMetaData() => new BmpMetaData();
+        public BmpMetadata CreateDefaultFormatMetadata() => new BmpMetadata();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/BmpMetaData.cs b/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
index 2d86856177..83d4eefe40 100644
--- a/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpMetaData.cs
@@ -6,20 +6,20 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Provides Bmp specific metadata information for the image.
     /// </summary>
-    public class BmpMetaData : IDeepCloneable
+    public class BmpMetadata : IDeepCloneable
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BmpMetaData"/> class.
+        /// Initializes a new instance of the <see cref="BmpMetadata"/> class.
         /// </summary>
-        public BmpMetaData()
+        public BmpMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BmpMetaData"/> class.
+        /// Initializes a new instance of the <see cref="BmpMetadata"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private BmpMetaData(BmpMetaData other)
+        private BmpMetadata(BmpMetadata other)
         {
             this.BitsPerPixel = other.BitsPerPixel;
             this.InfoHeaderType = other.InfoHeaderType;
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         public BmpBitsPerPixel BitsPerPixel { get; set; } = BmpBitsPerPixel.Pixel24;
 
         /// <inheritdoc/>
-        public IDeepCloneable DeepClone() => new BmpMetaData(this);
+        public IDeepCloneable DeepClone() => new BmpMetadata(this);
 
         // TODO: Colors used once we support encoding palette bmps.
     }
diff --git a/src/ImageSharp/Formats/Gif/GifDecoder.cs b/src/ImageSharp/Formats/Gif/GifDecoder.cs
index 42c76d6400..6af75f2d0f 100644
--- a/src/ImageSharp/Formats/Gif/GifDecoder.cs
+++ b/src/ImageSharp/Formats/Gif/GifDecoder.cs
@@ -3,7 +3,7 @@
 
 using System.IO;
 using System.Text;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Gif
diff --git a/src/ImageSharp/Formats/Gif/GifDecoderCore.cs b/src/ImageSharp/Formats/Gif/GifDecoderCore.cs
index bfa91416aa..e16ecb42e3 100644
--- a/src/ImageSharp/Formats/Gif/GifDecoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifDecoderCore.cs
@@ -8,7 +8,7 @@ using System.Runtime.InteropServices;
 using System.Text;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 using SixLabors.Primitives;
@@ -63,12 +63,12 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// The abstract metadata.
         /// </summary>
-        private ImageMetaData metaData;
+        private ImageMetadata metadata;
 
         /// <summary>
         /// The gif specific metadata.
         /// </summary>
-        private GifMetaData gifMetaData;
+        private GifMetadata gifMetadata;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="GifDecoderCore"/> class.
@@ -223,7 +223,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 new PixelTypeInfo(this.logicalScreenDescriptor.BitsPerPixel),
                 this.logicalScreenDescriptor.Width,
                 this.logicalScreenDescriptor.Height,
-                this.metaData);
+                this.metadata);
         }
 
         /// <summary>
@@ -276,7 +276,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 if (subBlockSize == GifConstants.NetscapeLoopingSubBlockSize)
                 {
                     this.stream.Read(this.buffer, 0, GifConstants.NetscapeLoopingSubBlockSize);
-                    this.gifMetaData.RepeatCount = GifNetscapeLoopingApplicationExtension.Parse(this.buffer.AsSpan(1)).RepeatCount;
+                    this.gifMetadata.RepeatCount = GifNetscapeLoopingApplicationExtension.Parse(this.buffer.AsSpan(1)).RepeatCount;
                     this.stream.Skip(1); // Skip the terminator.
                     return;
                 }
@@ -334,7 +334,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 {
                     this.stream.Read(commentsBuffer.Array, 0, length);
                     string comments = this.TextEncoding.GetString(commentsBuffer.Array, 0, length);
-                    this.metaData.Properties.Add(new ImageProperty(GifConstants.Comments, comments));
+                    this.metadata.Properties.Add(new ImageProperty(GifConstants.Comments, comments));
                 }
             }
         }
@@ -416,9 +416,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
             if (previousFrame is null)
             {
                 // This initializes the image to become fully transparent because the alpha channel is zero.
-                image = new Image<TPixel>(this.configuration, imageWidth, imageHeight, this.metaData);
+                image = new Image<TPixel>(this.configuration, imageWidth, imageHeight, this.metadata);
 
-                this.SetFrameMetaData(image.Frames.RootFrame.MetaData);
+                this.SetFrameMetadata(image.Frames.RootFrame.Metadata);
 
                 imageFrame = image.Frames.RootFrame;
             }
@@ -431,7 +431,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
 
                 currentFrame = image.Frames.AddFrame(previousFrame); // This clones the frame and adds it the collection
 
-                this.SetFrameMetaData(currentFrame.MetaData);
+                this.SetFrameMetadata(currentFrame.Metadata);
 
                 imageFrame = currentFrame;
 
@@ -549,11 +549,11 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// Sets the frames metadata.
         /// </summary>
-        /// <param name="meta">The meta data.</param>
+        /// <param name="meta">The metadata.</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void SetFrameMetaData(ImageFrameMetaData meta)
+        private void SetFrameMetadata(ImageFrameMetadata meta)
         {
-            GifFrameMetaData gifMeta = meta.GetFormatMetaData(GifFormat.Instance);
+            GifFrameMetadata gifMeta = meta.GetFormatMetadata(GifFormat.Instance);
             if (this.graphicsControlExtension.DelayTime > 0)
             {
                 gifMeta.FrameDelay = this.graphicsControlExtension.DelayTime;
@@ -586,7 +586,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             this.stream.Skip(6);
             this.ReadLogicalScreenDescriptor();
 
-            var meta = new ImageMetaData();
+            var meta = new ImageMetadata();
 
             // The Pixel Aspect Ratio is defined to be the quotient of the pixel's
             // width over its height.  The value range in this field allows
@@ -614,16 +614,16 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 }
             }
 
-            this.metaData = meta;
-            this.gifMetaData = meta.GetFormatMetaData(GifFormat.Instance);
-            this.gifMetaData.ColorTableMode = this.logicalScreenDescriptor.GlobalColorTableFlag
+            this.metadata = meta;
+            this.gifMetadata = meta.GetFormatMetadata(GifFormat.Instance);
+            this.gifMetadata.ColorTableMode = this.logicalScreenDescriptor.GlobalColorTableFlag
             ? GifColorTableMode.Global
             : GifColorTableMode.Local;
 
             if (this.logicalScreenDescriptor.GlobalColorTableFlag)
             {
                 int globalColorTableLength = this.logicalScreenDescriptor.GlobalColorTableSize * 3;
-                this.gifMetaData.GlobalColorTableLength = globalColorTableLength;
+                this.gifMetadata.GlobalColorTableLength = globalColorTableLength;
 
                 this.globalColorTable = this.MemoryAllocator.AllocateManagedByteBuffer(globalColorTableLength, AllocationOptions.Clean);
 
diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index c8580144ad..e5a5463ebb 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -10,7 +10,7 @@ using System.Text;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.Memory;
@@ -58,9 +58,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
         private int bitDepth;
 
         /// <summary>
-        /// Gif specific meta data.
+        /// Gif specific metadata.
         /// </summary>
-        private GifMetaData gifMetaData;
+        private GifMetadata gifMetadata;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="GifEncoderCore"/> class.
@@ -89,9 +89,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
 
             this.configuration = image.GetConfiguration();
 
-            ImageMetaData metaData = image.MetaData;
-            this.gifMetaData = metaData.GetFormatMetaData(GifFormat.Instance);
-            this.colorTableMode = this.colorTableMode ?? this.gifMetaData.ColorTableMode;
+            ImageMetadata metadata = image.Metadata;
+            this.gifMetadata = metadata.GetFormatMetadata(GifFormat.Instance);
+            this.colorTableMode = this.colorTableMode ?? this.gifMetadata.ColorTableMode;
             bool useGlobalTable = this.colorTableMode == GifColorTableMode.Global;
 
             // Quantize the image returning a palette.
@@ -106,7 +106,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
 
             // Write the LSD.
             int index = this.GetTransparentIndex(quantized);
-            this.WriteLogicalScreenDescriptor(metaData, image.Width, image.Height, index, useGlobalTable, stream);
+            this.WriteLogicalScreenDescriptor(metadata, image.Width, image.Height, index, useGlobalTable, stream);
 
             if (useGlobalTable)
             {
@@ -114,12 +114,12 @@ namespace SixLabors.ImageSharp.Formats.Gif
             }
 
             // Write the comments.
-            this.WriteComments(metaData, stream);
+            this.WriteComments(metadata, stream);
 
             // Write application extension to allow additional frames.
             if (image.Frames.Count > 1)
             {
-                this.WriteApplicationExtension(stream, this.gifMetaData.RepeatCount);
+                this.WriteApplicationExtension(stream, this.gifMetadata.RepeatCount);
             }
 
             if (useGlobalTable)
@@ -147,9 +147,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
             for (int i = 0; i < image.Frames.Count; i++)
             {
                 ImageFrame<TPixel> frame = image.Frames[i];
-                ImageFrameMetaData metaData = frame.MetaData;
-                GifFrameMetaData frameMetaData = metaData.GetFormatMetaData(GifFormat.Instance);
-                this.WriteGraphicalControlExtension(frameMetaData, transparencyIndex, stream);
+                ImageFrameMetadata metadata = frame.Metadata;
+                GifFrameMetadata frameMetadata = metadata.GetFormatMetadata(GifFormat.Instance);
+                this.WriteGraphicalControlExtension(frameMetadata, transparencyIndex, stream);
                 this.WriteImageDescriptor(frame, false, stream);
 
                 if (i == 0)
@@ -170,20 +170,20 @@ namespace SixLabors.ImageSharp.Formats.Gif
             where TPixel : struct, IPixel<TPixel>
         {
             ImageFrame<TPixel> previousFrame = null;
-            GifFrameMetaData previousMeta = null;
+            GifFrameMetadata previousMeta = null;
             foreach (ImageFrame<TPixel> frame in image.Frames)
             {
-                ImageFrameMetaData metaData = frame.MetaData;
-                GifFrameMetaData frameMetaData = metaData.GetFormatMetaData(GifFormat.Instance);
+                ImageFrameMetadata metadata = frame.Metadata;
+                GifFrameMetadata frameMetadata = metadata.GetFormatMetadata(GifFormat.Instance);
                 if (quantized is null)
                 {
                     // Allow each frame to be encoded at whatever color depth the frame designates if set.
-                    if (previousFrame != null && previousMeta.ColorTableLength != frameMetaData.ColorTableLength
-                                              && frameMetaData.ColorTableLength > 0)
+                    if (previousFrame != null && previousMeta.ColorTableLength != frameMetadata.ColorTableLength
+                                              && frameMetadata.ColorTableLength > 0)
                     {
                         quantized = this.quantizer.CreateFrameQuantizer<TPixel>(
                             image.GetConfiguration(),
-                            frameMetaData.ColorTableLength).QuantizeFrame(frame);
+                            frameMetadata.ColorTableLength).QuantizeFrame(frame);
                     }
                     else
                     {
@@ -193,7 +193,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 }
 
                 this.bitDepth = ImageMaths.GetBitsNeededForColorDepth(quantized.Palette.Length).Clamp(1, 8);
-                this.WriteGraphicalControlExtension(frameMetaData, this.GetTransparentIndex(quantized), stream);
+                this.WriteGraphicalControlExtension(frameMetadata, this.GetTransparentIndex(quantized), stream);
                 this.WriteImageDescriptor(frame, true, stream);
                 this.WriteColorTable(quantized, stream);
                 this.WriteImageData(quantized, stream);
@@ -201,7 +201,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 quantized?.Dispose();
                 quantized = null; // So next frame can regenerate it
                 previousFrame = frame;
-                previousMeta = frameMetaData;
+                previousMeta = frameMetadata;
             }
         }
 
@@ -250,14 +250,14 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// Writes the logical screen descriptor to the stream.
         /// </summary>
-        /// <param name="metaData">The image metadata.</param>
+        /// <param name="metadata">The image metadata.</param>
         /// <param name="width">The image width.</param>
         /// <param name="height">The image height.</param>
         /// <param name="transparencyIndex">The transparency index to set the default background index to.</param>
         /// <param name="useGlobalTable">Whether to use a global or local color table.</param>
         /// <param name="stream">The stream to write to.</param>
         private void WriteLogicalScreenDescriptor(
-            ImageMetaData metaData,
+            ImageMetadata metadata,
             int width,
             int height,
             int transparencyIndex,
@@ -277,10 +277,10 @@ namespace SixLabors.ImageSharp.Formats.Gif
             // Aspect Ratio = (Pixel Aspect Ratio + 15) / 64
             byte ratio = 0;
 
-            if (metaData.ResolutionUnits == PixelResolutionUnit.AspectRatio)
+            if (metadata.ResolutionUnits == PixelResolutionUnit.AspectRatio)
             {
-                double hr = metaData.HorizontalResolution;
-                double vr = metaData.VerticalResolution;
+                double hr = metadata.HorizontalResolution;
+                double vr = metadata.VerticalResolution;
                 if (hr != vr)
                 {
                     if (hr > vr)
@@ -326,7 +326,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// </summary>
         /// <param name="metadata">The metadata to be extract the comment data.</param>
         /// <param name="stream">The stream to write to.</param>
-        private void WriteComments(ImageMetaData metadata, Stream stream)
+        private void WriteComments(ImageMetadata metadata, Stream stream)
         {
             if (!metadata.TryGetProperty(GifConstants.Comments, out ImageProperty property)
                 || string.IsNullOrEmpty(property.Value))
@@ -350,18 +350,18 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// Writes the graphics control extension to the stream.
         /// </summary>
-        /// <param name="metaData">The metadata of the image or frame.</param>
+        /// <param name="metadata">The metadata of the image or frame.</param>
         /// <param name="transparencyIndex">The index of the color in the color palette to make transparent.</param>
         /// <param name="stream">The stream to write to.</param>
-        private void WriteGraphicalControlExtension(GifFrameMetaData metaData, int transparencyIndex, Stream stream)
+        private void WriteGraphicalControlExtension(GifFrameMetadata metadata, int transparencyIndex, Stream stream)
         {
             byte packedValue = GifGraphicControlExtension.GetPackedValue(
-                disposalMethod: metaData.DisposalMethod,
+                disposalMethod: metadata.DisposalMethod,
                 transparencyFlag: transparencyIndex > -1);
 
             var extension = new GifGraphicControlExtension(
                 packed: packedValue,
-                delayTime: (ushort)metaData.FrameDelay,
+                delayTime: (ushort)metadata.FrameDelay,
                 transparencyIndex: unchecked((byte)transparencyIndex));
 
             this.WriteExtension(extension, stream);
diff --git a/src/ImageSharp/Formats/Gif/GifFormat.cs b/src/ImageSharp/Formats/Gif/GifFormat.cs
index 07d4a54547..abe87819c6 100644
--- a/src/ImageSharp/Formats/Gif/GifFormat.cs
+++ b/src/ImageSharp/Formats/Gif/GifFormat.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
     /// <summary>
     /// Registers the image encoders, decoders and mime type detectors for the gif format.
     /// </summary>
-    public sealed class GifFormat : IImageFormat<GifMetaData, GifFrameMetaData>
+    public sealed class GifFormat : IImageFormat<GifMetadata, GifFrameMetadata>
     {
         private GifFormat()
         {
@@ -32,9 +32,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
         public IEnumerable<string> FileExtensions => GifConstants.FileExtensions;
 
         /// <inheritdoc/>
-        public GifMetaData CreateDefaultFormatMetaData() => new GifMetaData();
+        public GifMetadata CreateDefaultFormatMetadata() => new GifMetadata();
 
         /// <inheritdoc/>
-        public GifFrameMetaData CreateDefaultFormatFrameMetaData() => new GifFrameMetaData();
+        public GifFrameMetadata CreateDefaultFormatFrameMetadata() => new GifFrameMetadata();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Gif/GifFrameMetaData.cs b/src/ImageSharp/Formats/Gif/GifFrameMetaData.cs
index 0042c6a108..613825ad63 100644
--- a/src/ImageSharp/Formats/Gif/GifFrameMetaData.cs
+++ b/src/ImageSharp/Formats/Gif/GifFrameMetaData.cs
@@ -6,20 +6,20 @@ namespace SixLabors.ImageSharp.Formats.Gif
     /// <summary>
     /// Provides Gif specific metadata information for the image frame.
     /// </summary>
-    public class GifFrameMetaData : IDeepCloneable
+    public class GifFrameMetadata : IDeepCloneable
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="GifFrameMetaData"/> class.
+        /// Initializes a new instance of the <see cref="GifFrameMetadata"/> class.
         /// </summary>
-        public GifFrameMetaData()
+        public GifFrameMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GifFrameMetaData"/> class.
+        /// Initializes a new instance of the <see cref="GifFrameMetadata"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private GifFrameMetaData(GifFrameMetaData other)
+        private GifFrameMetadata(GifFrameMetadata other)
         {
             this.ColorTableLength = other.ColorTableLength;
             this.FrameDelay = other.FrameDelay;
@@ -49,6 +49,6 @@ namespace SixLabors.ImageSharp.Formats.Gif
         public GifDisposalMethod DisposalMethod { get; set; }
 
         /// <inheritdoc/>
-        public IDeepCloneable DeepClone() => new GifFrameMetaData(this);
+        public IDeepCloneable DeepClone() => new GifFrameMetadata(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Gif/GifMetaData.cs b/src/ImageSharp/Formats/Gif/GifMetaData.cs
index bb7fb50518..0b6566fbfe 100644
--- a/src/ImageSharp/Formats/Gif/GifMetaData.cs
+++ b/src/ImageSharp/Formats/Gif/GifMetaData.cs
@@ -6,20 +6,20 @@ namespace SixLabors.ImageSharp.Formats.Gif
     /// <summary>
     /// Provides Gif specific metadata information for the image.
     /// </summary>
-    public class GifMetaData : IDeepCloneable
+    public class GifMetadata : IDeepCloneable
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="GifMetaData"/> class.
+        /// Initializes a new instance of the <see cref="GifMetadata"/> class.
         /// </summary>
-        public GifMetaData()
+        public GifMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GifMetaData"/> class.
+        /// Initializes a new instance of the <see cref="GifMetadata"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private GifMetaData(GifMetaData other)
+        private GifMetadata(GifMetadata other)
         {
             this.RepeatCount = other.RepeatCount;
             this.ColorTableMode = other.ColorTableMode;
@@ -45,6 +45,6 @@ namespace SixLabors.ImageSharp.Formats.Gif
         public int GlobalColorTableLength { get; set; }
 
         /// <inheritdoc/>
-        public IDeepCloneable DeepClone() => new GifMetaData(this);
+        public IDeepCloneable DeepClone() => new GifMetadata(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs b/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
index 0c59163cce..871b511a0d 100644
--- a/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
+++ b/src/ImageSharp/Formats/Gif/IGifDecoderOptions.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Text;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 
 namespace SixLabors.ImageSharp.Formats.Gif
 {
diff --git a/src/ImageSharp/Formats/IImageFormat.cs b/src/ImageSharp/Formats/IImageFormat.cs
index 3cd289df76..bd0d6357cb 100644
--- a/src/ImageSharp/Formats/IImageFormat.cs
+++ b/src/ImageSharp/Formats/IImageFormat.cs
@@ -34,30 +34,30 @@ namespace SixLabors.ImageSharp.Formats
     /// <summary>
     /// Defines the contract for an image format containing metadata.
     /// </summary>
-    /// <typeparam name="TFormatMetaData">The type of format metadata.</typeparam>
-    public interface IImageFormat<out TFormatMetaData> : IImageFormat
-        where TFormatMetaData : class
+    /// <typeparam name="TFormatMetadata">The type of format metadata.</typeparam>
+    public interface IImageFormat<out TFormatMetadata> : IImageFormat
+        where TFormatMetadata : class
     {
         /// <summary>
         /// Creates a default instance of the format metadata.
         /// </summary>
-        /// <returns>The <typeparamref name="TFormatMetaData"/>.</returns>
-        TFormatMetaData CreateDefaultFormatMetaData();
+        /// <returns>The <typeparamref name="TFormatMetadata"/>.</returns>
+        TFormatMetadata CreateDefaultFormatMetadata();
     }
 
     /// <summary>
     /// Defines the contract for an image format containing metadata with multiple frames.
     /// </summary>
-    /// <typeparam name="TFormatMetaData">The type of format metadata.</typeparam>
-    /// <typeparam name="TFormatFrameMetaData">The type of format frame metadata.</typeparam>
-    public interface IImageFormat<out TFormatMetaData, out TFormatFrameMetaData> : IImageFormat<TFormatMetaData>
-        where TFormatMetaData : class
-        where TFormatFrameMetaData : class
+    /// <typeparam name="TFormatMetadata">The type of format metadata.</typeparam>
+    /// <typeparam name="TFormatFrameMetadata">The type of format frame metadata.</typeparam>
+    public interface IImageFormat<out TFormatMetadata, out TFormatFrameMetadata> : IImageFormat<TFormatMetadata>
+        where TFormatMetadata : class
+        where TFormatFrameMetadata : class
     {
         /// <summary>
         /// Creates a default instance of the format frame metadata.
         /// </summary>
-        /// <returns>The <typeparamref name="TFormatFrameMetaData"/>.</returns>
-        TFormatFrameMetaData CreateDefaultFormatFrameMetaData();
+        /// <returns>The <typeparamref name="TFormatFrameMetadata"/>.</returns>
+        TFormatFrameMetadata CreateDefaultFormatFrameMetadata();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
index 5bd5920dbe..7497c8a409 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 891dd52826..9852b36e49 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -12,9 +12,9 @@ using SixLabors.ImageSharp.Formats.Jpeg.Components;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
 using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.Memory;
@@ -149,9 +149,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         public bool IgnoreMetadata { get; }
 
         /// <summary>
-        /// Gets the <see cref="ImageMetaData"/> decoded by this decoder instance.
+        /// Gets the <see cref="ImageMetadata"/> decoded by this decoder instance.
         /// </summary>
-        public ImageMetaData MetaData { get; private set; }
+        public ImageMetadata Metadata { get; private set; }
 
         /// <inheritdoc/>
         public int ComponentCount { get; private set; }
@@ -222,7 +222,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.ParseStream(stream);
             this.InitExifProfile();
             this.InitIccProfile();
-            this.InitDerivedMetaDataProperties();
+            this.InitDerivedMetadataProperties();
             return this.PostProcessIntoImage<TPixel>();
         }
 
@@ -235,9 +235,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.ParseStream(stream, true);
             this.InitExifProfile();
             this.InitIccProfile();
-            this.InitDerivedMetaDataProperties();
+            this.InitDerivedMetadataProperties();
 
-            return new ImageInfo(new PixelTypeInfo(this.BitsPerPixel), this.ImageWidth, this.ImageHeight, this.MetaData);
+            return new ImageInfo(new PixelTypeInfo(this.BitsPerPixel), this.ImageWidth, this.ImageHeight, this.Metadata);
         }
 
         /// <summary>
@@ -247,7 +247,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <param name="metadataOnly">Whether to decode metadata only.</param>
         public void ParseStream(Stream stream, bool metadataOnly = false)
         {
-            this.MetaData = new ImageMetaData();
+            this.Metadata = new ImageMetadata();
             this.InputStream = new DoubleBufferedStreamReader(this.configuration.MemoryAllocator, stream);
 
             // Check for the Start Of Image marker.
@@ -430,7 +430,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         {
             if (this.isExif)
             {
-                this.MetaData.ExifProfile = new ExifProfile(this.exifData);
+                this.Metadata.ExifProfile = new ExifProfile(this.exifData);
             }
         }
 
@@ -444,21 +444,21 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 var profile = new IccProfile(this.iccData);
                 if (profile.CheckIsValid())
                 {
-                    this.MetaData.IccProfile = profile;
+                    this.Metadata.IccProfile = profile;
                 }
             }
         }
 
         /// <summary>
-        /// Assigns derived metadata properties to <see cref="MetaData"/>, eg. horizontal and vertical resolution if it has a JFIF header.
+        /// Assigns derived metadata properties to <see cref="Metadata"/>, eg. horizontal and vertical resolution if it has a JFIF header.
         /// </summary>
-        private void InitDerivedMetaDataProperties()
+        private void InitDerivedMetadataProperties()
         {
             if (this.jFif.XDensity > 0 && this.jFif.YDensity > 0)
             {
-                this.MetaData.HorizontalResolution = this.jFif.XDensity;
-                this.MetaData.VerticalResolution = this.jFif.YDensity;
-                this.MetaData.ResolutionUnits = this.jFif.DensityUnits;
+                this.Metadata.HorizontalResolution = this.jFif.XDensity;
+                this.Metadata.VerticalResolution = this.jFif.YDensity;
+                this.Metadata.ResolutionUnits = this.jFif.DensityUnits;
             }
             else if (this.isExif)
             {
@@ -467,16 +467,16 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
                 if (horizontalValue > 0 && verticalValue > 0)
                 {
-                    this.MetaData.HorizontalResolution = horizontalValue;
-                    this.MetaData.VerticalResolution = verticalValue;
-                    this.MetaData.ResolutionUnits = UnitConverter.ExifProfileToResolutionUnit(this.MetaData.ExifProfile);
+                    this.Metadata.HorizontalResolution = horizontalValue;
+                    this.Metadata.VerticalResolution = verticalValue;
+                    this.Metadata.ResolutionUnits = UnitConverter.ExifProfileToResolutionUnit(this.Metadata.ExifProfile);
                 }
             }
         }
 
         private double GetExifResolutionValue(ExifTag tag)
         {
-            if (!this.MetaData.ExifProfile.TryGetValue(tag, out ExifValue exifValue))
+            if (!this.Metadata.ExifProfile.TryGetValue(tag, out ExifValue exifValue))
             {
                 return 0;
             }
@@ -713,7 +713,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 JpegThrowHelper.ThrowBadMarker(nameof(JpegConstants.Markers.DQT), remaining);
             }
 
-            this.MetaData.GetFormatMetaData(JpegFormat.Instance).Quality = QualityEvaluator.EstimateQuality(this.QuantizationTables);
+            this.Metadata.GetFormatMetadata(JpegFormat.Instance).Quality = QualityEvaluator.EstimateQuality(this.QuantizationTables);
         }
 
         /// <summary>
@@ -992,7 +992,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 this.configuration,
                 this.ImageWidth,
                 this.ImageHeight,
-                this.MetaData);
+                this.Metadata);
 
             using (var postProcessor = new JpegImagePostProcessor(this.configuration, this))
             {
diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index 4544244f08..d4ce28107f 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -10,9 +10,9 @@ using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Formats.Jpeg.Components;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Encoder;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg
@@ -204,10 +204,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             }
 
             this.outputStream = stream;
-            ImageMetaData metaData = image.MetaData;
+            ImageMetadata metadata = image.Metadata;
 
             // System.Drawing produces identical output for jpegs with a quality parameter of 0 and 1.
-            int qlty = (this.quality ?? metaData.GetFormatMetaData(JpegFormat.Instance).Quality).Clamp(1, 100);
+            int qlty = (this.quality ?? metadata.GetFormatMetadata(JpegFormat.Instance).Quality).Clamp(1, 100);
             this.subsample = this.subsample ?? (qlty >= 91 ? JpegSubsample.Ratio444 : JpegSubsample.Ratio420);
 
             // Convert from a quality rating to a scaling factor.
@@ -229,10 +229,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             int componentCount = 3;
 
             // Write the Start Of Image marker.
-            this.WriteApplicationHeader(metaData);
+            this.WriteApplicationHeader(metadata);
 
             // Write Exif and ICC profiles
-            this.WriteProfiles(metaData);
+            this.WriteProfiles(metadata);
 
             // Write the quantization tables.
             this.WriteDefineQuantizationTables();
@@ -448,8 +448,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// Writes the application header containing the JFIF identifier plus extra data.
         /// </summary>
-        /// <param name="meta">The image meta data.</param>
-        private void WriteApplicationHeader(ImageMetaData meta)
+        /// <param name="meta">The image metadata.</param>
+        private void WriteApplicationHeader(ImageMetadata meta)
         {
             // Write the start of image marker. Markers are always prefixed with 0xff.
             this.buffer[0] = JpegConstants.Markers.XFF;
@@ -791,17 +791,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <summary>
         /// Writes the metadata profiles to the image.
         /// </summary>
-        /// <param name="metaData">The image meta data.</param>
-        private void WriteProfiles(ImageMetaData metaData)
+        /// <param name="metadata">The image metadata.</param>
+        private void WriteProfiles(ImageMetadata metadata)
         {
-            if (metaData is null)
+            if (metadata is null)
             {
                 return;
             }
 
-            metaData.SyncProfiles();
-            this.WriteExifProfile(metaData.ExifProfile);
-            this.WriteIccProfile(metaData.IccProfile);
+            metadata.SyncProfiles();
+            this.WriteExifProfile(metadata.ExifProfile);
+            this.WriteIccProfile(metadata.IccProfile);
         }
 
         /// <summary>
diff --git a/src/ImageSharp/Formats/Jpeg/JpegFormat.cs b/src/ImageSharp/Formats/Jpeg/JpegFormat.cs
index 6b23ceac7a..f56072a4b5 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegFormat.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegFormat.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
     /// <summary>
     /// Registers the image encoders, decoders and mime type detectors for the jpeg format.
     /// </summary>
-    public sealed class JpegFormat : IImageFormat<JpegMetaData>
+    public sealed class JpegFormat : IImageFormat<JpegMetadata>
     {
         private JpegFormat()
         {
@@ -32,6 +32,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         public IEnumerable<string> FileExtensions => JpegConstants.FileExtensions;
 
         /// <inheritdoc/>
-        public JpegMetaData CreateDefaultFormatMetaData() => new JpegMetaData();
+        public JpegMetadata CreateDefaultFormatMetadata() => new JpegMetadata();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/JpegMetaData.cs b/src/ImageSharp/Formats/Jpeg/JpegMetaData.cs
index fcad29e5d0..9f0deae02c 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegMetaData.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegMetaData.cs
@@ -6,20 +6,20 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
     /// <summary>
     /// Provides Jpeg specific metadata information for the image.
     /// </summary>
-    public class JpegMetaData : IDeepCloneable
+    public class JpegMetadata : IDeepCloneable
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="JpegMetaData"/> class.
+        /// Initializes a new instance of the <see cref="JpegMetadata"/> class.
         /// </summary>
-        public JpegMetaData()
+        public JpegMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="JpegMetaData"/> class.
+        /// Initializes a new instance of the <see cref="JpegMetadata"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private JpegMetaData(JpegMetaData other) => this.Quality = other.Quality;
+        private JpegMetadata(JpegMetadata other) => this.Quality = other.Quality;
 
         /// <summary>
         /// Gets or sets the encoded quality.
@@ -27,6 +27,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         public int Quality { get; set; } = 75;
 
         /// <inheritdoc/>
-        public IDeepCloneable DeepClone() => new JpegMetaData(this);
+        public IDeepCloneable DeepClone() => new JpegMetadata(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs b/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
index 1d0e280bd3..8b3c3e9aad 100644
--- a/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
+++ b/src/ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Buffers.Binary;
 using SixLabors.ImageSharp.Common.Helpers;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 
 namespace SixLabors.ImageSharp.Formats.Png.Chunks
 {
@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.Formats.Png.Chunks
         /// </summary>
         /// <param name="meta">The metadata.</param>
         /// <returns>The constructed PngPhysicalChunkData instance.</returns>
-        public static PhysicalChunkData FromMetadata(ImageMetaData meta)
+        public static PhysicalChunkData FromMetadata(ImageMetadata meta)
         {
             byte unitSpecifier = 0;
             uint x;
diff --git a/src/ImageSharp/Formats/Png/PngDecoderCore.cs b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
index 9ffac5e626..5e9d1440ac 100644
--- a/src/ImageSharp/Formats/Png/PngDecoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
@@ -12,8 +12,8 @@ using SixLabors.ImageSharp.Formats.Png.Chunks;
 using SixLabors.ImageSharp.Formats.Png.Filters;
 using SixLabors.ImageSharp.Formats.Png.Zlib;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
@@ -157,8 +157,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         public Image<TPixel> Decode<TPixel>(Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
-            var metaData = new ImageMetaData();
-            PngMetaData pngMetaData = metaData.GetFormatMetaData(PngFormat.Instance);
+            var metadata = new ImageMetadata();
+            PngMetadata pngMetadata = metadata.GetFormatMetadata(PngFormat.Instance);
             this.currentStream = stream;
             this.currentStream.Skip(8);
             Image<TPixel> image = null;
@@ -171,24 +171,24 @@ namespace SixLabors.ImageSharp.Formats.Png
                         switch (chunk.Type)
                         {
                             case PngChunkType.Header:
-                                this.ReadHeaderChunk(pngMetaData, chunk.Data.Array);
+                                this.ReadHeaderChunk(pngMetadata, chunk.Data.Array);
                                 break;
                             case PngChunkType.Physical:
-                                this.ReadPhysicalChunk(metaData, chunk.Data.GetSpan());
+                                this.ReadPhysicalChunk(metadata, chunk.Data.GetSpan());
                                 break;
                             case PngChunkType.Gamma:
-                                this.ReadGammaChunk(pngMetaData, chunk.Data.GetSpan());
+                                this.ReadGammaChunk(pngMetadata, chunk.Data.GetSpan());
                                 break;
                             case PngChunkType.Data:
                                 if (image is null)
                                 {
-                                    this.InitializeImage(metaData, out image);
+                                    this.InitializeImage(metadata, out image);
                                 }
 
                                 using (var deframeStream = new ZlibInflateStream(this.currentStream, this.ReadNextDataChunk))
                                 {
                                     deframeStream.AllocateNewBytes(chunk.Length);
-                                    this.ReadScanlines(deframeStream.CompressedStream, image.Frames.RootFrame, pngMetaData);
+                                    this.ReadScanlines(deframeStream.CompressedStream, image.Frames.RootFrame, pngMetadata);
                                 }
 
                                 break;
@@ -201,17 +201,17 @@ namespace SixLabors.ImageSharp.Formats.Png
                                 byte[] alpha = new byte[chunk.Length];
                                 Buffer.BlockCopy(chunk.Data.Array, 0, alpha, 0, chunk.Length);
                                 this.paletteAlpha = alpha;
-                                this.AssignTransparentMarkers(alpha, pngMetaData);
+                                this.AssignTransparentMarkers(alpha, pngMetadata);
                                 break;
                             case PngChunkType.Text:
-                                this.ReadTextChunk(metaData, chunk.Data.Array.AsSpan(0, chunk.Length));
+                                this.ReadTextChunk(metadata, chunk.Data.Array.AsSpan(0, chunk.Length));
                                 break;
                             case PngChunkType.Exif:
                                 if (!this.ignoreMetadata)
                                 {
                                     byte[] exifData = new byte[chunk.Length];
                                     Buffer.BlockCopy(chunk.Data.Array, 0, exifData, 0, chunk.Length);
-                                    metaData.ExifProfile = new ExifProfile(exifData);
+                                    metadata.ExifProfile = new ExifProfile(exifData);
                                 }
 
                                 break;
@@ -246,8 +246,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
         public IImageInfo Identify(Stream stream)
         {
-            var metaData = new ImageMetaData();
-            PngMetaData pngMetaData = metaData.GetFormatMetaData(PngFormat.Instance);
+            var metadata = new ImageMetadata();
+            PngMetadata pngMetadata = metadata.GetFormatMetadata(PngFormat.Instance);
             this.currentStream = stream;
             this.currentStream.Skip(8);
             try
@@ -259,19 +259,19 @@ namespace SixLabors.ImageSharp.Formats.Png
                         switch (chunk.Type)
                         {
                             case PngChunkType.Header:
-                                this.ReadHeaderChunk(pngMetaData, chunk.Data.Array);
+                                this.ReadHeaderChunk(pngMetadata, chunk.Data.Array);
                                 break;
                             case PngChunkType.Physical:
-                                this.ReadPhysicalChunk(metaData, chunk.Data.GetSpan());
+                                this.ReadPhysicalChunk(metadata, chunk.Data.GetSpan());
                                 break;
                             case PngChunkType.Gamma:
-                                this.ReadGammaChunk(pngMetaData, chunk.Data.GetSpan());
+                                this.ReadGammaChunk(pngMetadata, chunk.Data.GetSpan());
                                 break;
                             case PngChunkType.Data:
                                 this.SkipChunkDataAndCrc(chunk);
                                 break;
                             case PngChunkType.Text:
-                                this.ReadTextChunk(metaData, chunk.Data.Array.AsSpan(0, chunk.Length));
+                                this.ReadTextChunk(metadata, chunk.Data.Array.AsSpan(0, chunk.Length));
                                 break;
                             case PngChunkType.End:
                                 this.isEndChunkReached = true;
@@ -295,7 +295,7 @@ namespace SixLabors.ImageSharp.Formats.Png
                 throw new ImageFormatException("PNG Image does not contain a header chunk");
             }
 
-            return new ImageInfo(new PixelTypeInfo(this.CalculateBitsPerPixel()), this.header.Width, this.header.Height, metaData);
+            return new ImageInfo(new PixelTypeInfo(this.CalculateBitsPerPixel()), this.header.Width, this.header.Height, metadata);
         }
 
         /// <summary>
@@ -350,7 +350,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// </summary>
         /// <param name="metadata">The metadata to read to.</param>
         /// <param name="data">The data containing physical data.</param>
-        private void ReadPhysicalChunk(ImageMetaData metadata, ReadOnlySpan<byte> data)
+        private void ReadPhysicalChunk(ImageMetadata metadata, ReadOnlySpan<byte> data)
         {
             var physicalChunk = PhysicalChunkData.Parse(data);
 
@@ -367,7 +367,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// </summary>
         /// <param name="pngMetadata">The metadata to read to.</param>
         /// <param name="data">The data containing physical data.</param>
-        private void ReadGammaChunk(PngMetaData pngMetadata, ReadOnlySpan<byte> data)
+        private void ReadGammaChunk(PngMetadata pngMetadata, ReadOnlySpan<byte> data)
         {
             // The value is encoded as a 4-byte unsigned integer, representing gamma times 100000.
             // For example, a gamma of 1/2.2 would be stored as 45455.
@@ -380,7 +380,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The type the pixels will be</typeparam>
         /// <param name="metadata">The metadata information for the image</param>
         /// <param name="image">The image that we will populate</param>
-        private void InitializeImage<TPixel>(ImageMetaData metadata, out Image<TPixel> image)
+        private void InitializeImage<TPixel>(ImageMetadata metadata, out Image<TPixel> image)
             where TPixel : struct, IPixel<TPixel>
         {
             image = new Image<TPixel>(this.configuration, this.header.Width, this.header.Height, metadata);
@@ -471,17 +471,17 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="dataStream">The <see cref="MemoryStream"/> containing data.</param>
         /// <param name="image"> The pixel data.</param>
-        /// <param name="pngMetaData">The png meta data</param>
-        private void ReadScanlines<TPixel>(Stream dataStream, ImageFrame<TPixel> image, PngMetaData pngMetaData)
+        /// <param name="pngMetadata">The png metadata</param>
+        private void ReadScanlines<TPixel>(Stream dataStream, ImageFrame<TPixel> image, PngMetadata pngMetadata)
             where TPixel : struct, IPixel<TPixel>
         {
             if (this.header.InterlaceMethod == PngInterlaceMode.Adam7)
             {
-                this.DecodeInterlacedPixelData(dataStream, image, pngMetaData);
+                this.DecodeInterlacedPixelData(dataStream, image, pngMetadata);
             }
             else
             {
-                this.DecodePixelData(dataStream, image, pngMetaData);
+                this.DecodePixelData(dataStream, image, pngMetadata);
             }
         }
 
@@ -491,8 +491,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="compressedStream">The compressed pixel data stream.</param>
         /// <param name="image">The image to decode to.</param>
-        /// <param name="pngMetaData">The png meta data</param>
-        private void DecodePixelData<TPixel>(Stream compressedStream, ImageFrame<TPixel> image, PngMetaData pngMetaData)
+        /// <param name="pngMetadata">The png metadata</param>
+        private void DecodePixelData<TPixel>(Stream compressedStream, ImageFrame<TPixel> image, PngMetadata pngMetadata)
             where TPixel : struct, IPixel<TPixel>
         {
             while (this.currentRow < this.header.Height)
@@ -532,7 +532,7 @@ namespace SixLabors.ImageSharp.Formats.Png
                         throw new ImageFormatException("Unknown filter type.");
                 }
 
-                this.ProcessDefilteredScanline(scanlineSpan, image, pngMetaData);
+                this.ProcessDefilteredScanline(scanlineSpan, image, pngMetadata);
 
                 this.SwapBuffers();
                 this.currentRow++;
@@ -546,8 +546,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="compressedStream">The compressed pixel data stream.</param>
         /// <param name="image">The current image.</param>
-        /// <param name="pngMetaData">The png meta data</param>
-        private void DecodeInterlacedPixelData<TPixel>(Stream compressedStream, ImageFrame<TPixel> image, PngMetaData pngMetaData)
+        /// <param name="pngMetadata">The png metadata.</param>
+        private void DecodeInterlacedPixelData<TPixel>(Stream compressedStream, ImageFrame<TPixel> image, PngMetadata pngMetadata)
             where TPixel : struct, IPixel<TPixel>
         {
             while (true)
@@ -604,7 +604,7 @@ namespace SixLabors.ImageSharp.Formats.Png
                     }
 
                     Span<TPixel> rowSpan = image.GetPixelRowSpan(this.currentRow);
-                    this.ProcessInterlacedDefilteredScanline(this.scanline.GetSpan(), rowSpan, pngMetaData, Adam7.FirstColumn[this.pass], Adam7.ColumnIncrement[this.pass]);
+                    this.ProcessInterlacedDefilteredScanline(this.scanline.GetSpan(), rowSpan, pngMetadata, Adam7.FirstColumn[this.pass], Adam7.ColumnIncrement[this.pass]);
 
                     this.SwapBuffers();
 
@@ -632,8 +632,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="defilteredScanline">The de-filtered scanline</param>
         /// <param name="pixels">The image</param>
-        /// <param name="pngMetaData">The png meta data</param>
-        private void ProcessDefilteredScanline<TPixel>(ReadOnlySpan<byte> defilteredScanline, ImageFrame<TPixel> pixels, PngMetaData pngMetaData)
+        /// <param name="pngMetadata">The png metadata.</param>
+        private void ProcessDefilteredScanline<TPixel>(ReadOnlySpan<byte> defilteredScanline, ImageFrame<TPixel> pixels, PngMetadata pngMetadata)
             where TPixel : struct, IPixel<TPixel>
         {
             Span<TPixel> rowSpan = pixels.GetPixelRowSpan(this.currentRow);
@@ -653,9 +653,9 @@ namespace SixLabors.ImageSharp.Formats.Png
                         this.header,
                         scanlineSpan,
                         rowSpan,
-                        pngMetaData.HasTrans,
-                        pngMetaData.TransparentGray16.GetValueOrDefault(),
-                        pngMetaData.TransparentGray8.GetValueOrDefault());
+                        pngMetadata.HasTrans,
+                        pngMetadata.TransparentGray16.GetValueOrDefault(),
+                        pngMetadata.TransparentGray8.GetValueOrDefault());
 
                     break;
 
@@ -687,9 +687,9 @@ namespace SixLabors.ImageSharp.Formats.Png
                         rowSpan,
                         this.bytesPerPixel,
                         this.bytesPerSample,
-                        pngMetaData.HasTrans,
-                        pngMetaData.TransparentRgb48.GetValueOrDefault(),
-                        pngMetaData.TransparentRgb24.GetValueOrDefault());
+                        pngMetadata.HasTrans,
+                        pngMetadata.TransparentRgb48.GetValueOrDefault(),
+                        pngMetadata.TransparentRgb24.GetValueOrDefault());
 
                     break;
 
@@ -714,10 +714,10 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="defilteredScanline">The de-filtered scanline</param>
         /// <param name="rowSpan">The current image row.</param>
-        /// <param name="pngMetaData">The png meta data</param>
+        /// <param name="pngMetadata">The png metadata.</param>
         /// <param name="pixelOffset">The column start index. Always 0 for none interlaced images.</param>
         /// <param name="increment">The column increment. Always 1 for none interlaced images.</param>
-        private void ProcessInterlacedDefilteredScanline<TPixel>(ReadOnlySpan<byte> defilteredScanline, Span<TPixel> rowSpan, PngMetaData pngMetaData, int pixelOffset = 0, int increment = 1)
+        private void ProcessInterlacedDefilteredScanline<TPixel>(ReadOnlySpan<byte> defilteredScanline, Span<TPixel> rowSpan, PngMetadata pngMetadata, int pixelOffset = 0, int increment = 1)
             where TPixel : struct, IPixel<TPixel>
         {
             // Trim the first marker byte from the buffer
@@ -737,9 +737,9 @@ namespace SixLabors.ImageSharp.Formats.Png
                         rowSpan,
                         pixelOffset,
                         increment,
-                        pngMetaData.HasTrans,
-                        pngMetaData.TransparentGray16.GetValueOrDefault(),
-                        pngMetaData.TransparentGray8.GetValueOrDefault());
+                        pngMetadata.HasTrans,
+                        pngMetadata.TransparentGray16.GetValueOrDefault(),
+                        pngMetadata.TransparentGray8.GetValueOrDefault());
 
                     break;
 
@@ -776,9 +776,9 @@ namespace SixLabors.ImageSharp.Formats.Png
                         increment,
                         this.bytesPerPixel,
                         this.bytesPerSample,
-                        pngMetaData.HasTrans,
-                        pngMetaData.TransparentRgb48.GetValueOrDefault(),
-                        pngMetaData.TransparentRgb24.GetValueOrDefault());
+                        pngMetadata.HasTrans,
+                        pngMetadata.TransparentRgb48.GetValueOrDefault(),
+                        pngMetadata.TransparentRgb24.GetValueOrDefault());
 
                     break;
 
@@ -799,11 +799,11 @@ namespace SixLabors.ImageSharp.Formats.Png
         }
 
         /// <summary>
-        /// Decodes and assigns marker colors that identify transparent pixels in non indexed images
+        /// Decodes and assigns marker colors that identify transparent pixels in non indexed images.
         /// </summary>
-        /// <param name="alpha">The alpha tRNS array</param>
-        /// <param name="pngMetaData">The png meta data</param>
-        private void AssignTransparentMarkers(ReadOnlySpan<byte> alpha, PngMetaData pngMetaData)
+        /// <param name="alpha">The alpha tRNS array.</param>
+        /// <param name="pngMetadata">The png metadata.</param>
+        private void AssignTransparentMarkers(ReadOnlySpan<byte> alpha, PngMetadata pngMetadata)
         {
             if (this.pngColorType == PngColorType.Rgb)
             {
@@ -815,16 +815,16 @@ namespace SixLabors.ImageSharp.Formats.Png
                         ushort gc = BinaryPrimitives.ReadUInt16LittleEndian(alpha.Slice(2, 2));
                         ushort bc = BinaryPrimitives.ReadUInt16LittleEndian(alpha.Slice(4, 2));
 
-                        pngMetaData.TransparentRgb48 = new Rgb48(rc, gc, bc);
-                        pngMetaData.HasTrans = true;
+                        pngMetadata.TransparentRgb48 = new Rgb48(rc, gc, bc);
+                        pngMetadata.HasTrans = true;
                         return;
                     }
 
                     byte r = ReadByteLittleEndian(alpha, 0);
                     byte g = ReadByteLittleEndian(alpha, 2);
                     byte b = ReadByteLittleEndian(alpha, 4);
-                    pngMetaData.TransparentRgb24 = new Rgb24(r, g, b);
-                    pngMetaData.HasTrans = true;
+                    pngMetadata.TransparentRgb24 = new Rgb24(r, g, b);
+                    pngMetadata.HasTrans = true;
                 }
             }
             else if (this.pngColorType == PngColorType.Grayscale)
@@ -833,14 +833,14 @@ namespace SixLabors.ImageSharp.Formats.Png
                 {
                     if (this.header.BitDepth == 16)
                     {
-                        pngMetaData.TransparentGray16 = new Gray16(BinaryPrimitives.ReadUInt16LittleEndian(alpha.Slice(0, 2)));
+                        pngMetadata.TransparentGray16 = new Gray16(BinaryPrimitives.ReadUInt16LittleEndian(alpha.Slice(0, 2)));
                     }
                     else
                     {
-                        pngMetaData.TransparentGray8 = new Gray8(ReadByteLittleEndian(alpha, 0));
+                        pngMetadata.TransparentGray8 = new Gray8(ReadByteLittleEndian(alpha, 0));
                     }
 
-                    pngMetaData.HasTrans = true;
+                    pngMetadata.HasTrans = true;
                 }
             }
         }
@@ -848,16 +848,16 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <summary>
         /// Reads a header chunk from the data.
         /// </summary>
-        /// <param name="pngMetaData">The png metadata.</param>
+        /// <param name="pngMetadata">The png metadata.</param>
         /// <param name="data">The <see cref="T:ReadOnlySpan{byte}"/> containing data.</param>
-        private void ReadHeaderChunk(PngMetaData pngMetaData, ReadOnlySpan<byte> data)
+        private void ReadHeaderChunk(PngMetadata pngMetadata, ReadOnlySpan<byte> data)
         {
             this.header = PngHeader.Parse(data);
 
             this.header.Validate();
 
-            pngMetaData.BitDepth = (PngBitDepth)this.header.BitDepth;
-            pngMetaData.ColorType = this.header.ColorType;
+            pngMetadata.BitDepth = (PngBitDepth)this.header.BitDepth;
+            pngMetadata.ColorType = this.header.ColorType;
 
             this.pngColorType = this.header.ColorType;
         }
@@ -867,7 +867,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// </summary>
         /// <param name="metadata">The metadata to decode to.</param>
         /// <param name="data">The <see cref="T:Span"/> containing the data.</param>
-        private void ReadTextChunk(ImageMetaData metadata, ReadOnlySpan<byte> data)
+        private void ReadTextChunk(ImageMetadata metadata, ReadOnlySpan<byte> data)
         {
             if (this.ignoreMetadata)
             {
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 96e2dd946d..9818e6cf17 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -14,7 +14,7 @@ using SixLabors.ImageSharp.Formats.Png.Chunks;
 using SixLabors.ImageSharp.Formats.Png.Filters;
 using SixLabors.ImageSharp.Formats.Png.Zlib;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.Memory;
@@ -211,12 +211,12 @@ namespace SixLabors.ImageSharp.Formats.Png
             this.height = image.Height;
 
             // Always take the encoder options over the metadata values.
-            ImageMetaData metaData = image.MetaData;
-            PngMetaData pngMetaData = metaData.GetFormatMetaData(PngFormat.Instance);
-            this.gamma = this.gamma ?? pngMetaData.Gamma;
+            ImageMetadata metadata = image.Metadata;
+            PngMetadata pngMetadata = metadata.GetFormatMetadata(PngFormat.Instance);
+            this.gamma = this.gamma ?? pngMetadata.Gamma;
             this.writeGamma = this.gamma > 0;
-            this.pngColorType = this.pngColorType ?? pngMetaData.ColorType;
-            this.pngBitDepth = this.pngBitDepth ?? pngMetaData.BitDepth;
+            this.pngColorType = this.pngColorType ?? pngMetadata.ColorType;
+            this.pngBitDepth = this.pngBitDepth ?? pngMetadata.BitDepth;
             this.use16Bit = this.pngBitDepth == PngBitDepth.Bit16;
 
             // Ensure we are not allowing impossible combinations.
@@ -290,14 +290,14 @@ namespace SixLabors.ImageSharp.Formats.Png
                 this.WritePaletteChunk(stream, quantized);
             }
 
-            if (pngMetaData.HasTrans)
+            if (pngMetadata.HasTrans)
             {
-                this.WriteTransparencyChunk(stream, pngMetaData);
+                this.WriteTransparencyChunk(stream, pngMetadata);
             }
 
-            this.WritePhysicalChunk(stream, metaData);
+            this.WritePhysicalChunk(stream, metadata);
             this.WriteGammaChunk(stream);
-            this.WriteExifChunk(stream, metaData);
+            this.WriteExifChunk(stream, metadata);
             this.WriteDataChunks(image.Frames.RootFrame, quantized, stream);
             this.WriteEndChunk(stream);
             stream.Flush();
@@ -714,8 +714,8 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// Writes the physical dimension information to the stream.
         /// </summary>
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
-        /// <param name="meta">The image meta data.</param>
-        private void WritePhysicalChunk(Stream stream, ImageMetaData meta)
+        /// <param name="meta">The image metadata.</param>
+        private void WritePhysicalChunk(Stream stream, ImageMetadata meta)
         {
             PhysicalChunkData.FromMetadata(meta).WriteTo(this.chunkDataBuffer);
 
@@ -723,11 +723,11 @@ namespace SixLabors.ImageSharp.Formats.Png
         }
 
         /// <summary>
-        /// Writes the eXIf chunk to the stream, if any EXIF Profile values are present in the meta data.
+        /// Writes the eXIf chunk to the stream, if any EXIF Profile values are present in the metadata.
         /// </summary>
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
-        /// <param name="meta">The image meta data.</param>
-        private void WriteExifChunk(Stream stream, ImageMetaData meta)
+        /// <param name="meta">The image metadata.</param>
+        private void WriteExifChunk(Stream stream, ImageMetadata meta)
         {
             if (meta.ExifProfile?.Values.Count > 0)
             {
@@ -757,42 +757,42 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// Writes the transparency chunk to the stream
         /// </summary>
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
-        /// <param name="pngMetaData">The image meta data.</param>
-        private void WriteTransparencyChunk(Stream stream, PngMetaData pngMetaData)
+        /// <param name="pngMetadata">The image metadata.</param>
+        private void WriteTransparencyChunk(Stream stream, PngMetadata pngMetadata)
         {
             Span<byte> alpha = this.chunkDataBuffer.AsSpan();
-            if (pngMetaData.ColorType == PngColorType.Rgb)
+            if (pngMetadata.ColorType == PngColorType.Rgb)
             {
-                if (pngMetaData.TransparentRgb48.HasValue && this.use16Bit)
+                if (pngMetadata.TransparentRgb48.HasValue && this.use16Bit)
                 {
-                    Rgb48 rgb = pngMetaData.TransparentRgb48.Value;
+                    Rgb48 rgb = pngMetadata.TransparentRgb48.Value;
                     BinaryPrimitives.WriteUInt16LittleEndian(alpha, rgb.R);
                     BinaryPrimitives.WriteUInt16LittleEndian(alpha.Slice(2, 2), rgb.G);
                     BinaryPrimitives.WriteUInt16LittleEndian(alpha.Slice(4, 2), rgb.B);
 
                     this.WriteChunk(stream, PngChunkType.Transparency, this.chunkDataBuffer, 0, 6);
                 }
-                else if (pngMetaData.TransparentRgb24.HasValue)
+                else if (pngMetadata.TransparentRgb24.HasValue)
                 {
                     alpha.Clear();
-                    Rgb24 rgb = pngMetaData.TransparentRgb24.Value;
+                    Rgb24 rgb = pngMetadata.TransparentRgb24.Value;
                     alpha[1] = rgb.R;
                     alpha[3] = rgb.G;
                     alpha[5] = rgb.B;
                     this.WriteChunk(stream, PngChunkType.Transparency, this.chunkDataBuffer, 0, 6);
                 }
             }
-            else if (pngMetaData.ColorType == PngColorType.Grayscale)
+            else if (pngMetadata.ColorType == PngColorType.Grayscale)
             {
-                if (pngMetaData.TransparentGray16.HasValue && this.use16Bit)
+                if (pngMetadata.TransparentGray16.HasValue && this.use16Bit)
                 {
-                    BinaryPrimitives.WriteUInt16LittleEndian(alpha, pngMetaData.TransparentGray16.Value.PackedValue);
+                    BinaryPrimitives.WriteUInt16LittleEndian(alpha, pngMetadata.TransparentGray16.Value.PackedValue);
                     this.WriteChunk(stream, PngChunkType.Transparency, this.chunkDataBuffer, 0, 2);
                 }
-                else if (pngMetaData.TransparentGray8.HasValue)
+                else if (pngMetadata.TransparentGray8.HasValue)
                 {
                     alpha.Clear();
-                    alpha[1] = pngMetaData.TransparentGray8.Value.PackedValue;
+                    alpha[1] = pngMetadata.TransparentGray8.Value.PackedValue;
                     this.WriteChunk(stream, PngChunkType.Transparency, this.chunkDataBuffer, 0, 2);
                 }
             }
diff --git a/src/ImageSharp/Formats/Png/PngFormat.cs b/src/ImageSharp/Formats/Png/PngFormat.cs
index 210e2a837d..408e37802f 100644
--- a/src/ImageSharp/Formats/Png/PngFormat.cs
+++ b/src/ImageSharp/Formats/Png/PngFormat.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.Png
     /// <summary>
     /// Registers the image encoders, decoders and mime type detectors for the png format.
     /// </summary>
-    public sealed class PngFormat : IImageFormat<PngMetaData>
+    public sealed class PngFormat : IImageFormat<PngMetadata>
     {
         private PngFormat()
         {
@@ -32,6 +32,6 @@ namespace SixLabors.ImageSharp.Formats.Png
         public IEnumerable<string> FileExtensions => PngConstants.FileExtensions;
 
         /// <inheritdoc/>
-        public PngMetaData CreateDefaultFormatMetaData() => new PngMetaData();
+        public PngMetadata CreateDefaultFormatMetadata() => new PngMetadata();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Png/PngMetaData.cs b/src/ImageSharp/Formats/Png/PngMetaData.cs
index d5ab3d2554..dd951763f7 100644
--- a/src/ImageSharp/Formats/Png/PngMetaData.cs
+++ b/src/ImageSharp/Formats/Png/PngMetaData.cs
@@ -8,20 +8,20 @@ namespace SixLabors.ImageSharp.Formats.Png
     /// <summary>
     /// Provides Png specific metadata information for the image.
     /// </summary>
-    public class PngMetaData : IDeepCloneable
+    public class PngMetadata : IDeepCloneable
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="PngMetaData"/> class.
+        /// Initializes a new instance of the <see cref="PngMetadata"/> class.
         /// </summary>
-        public PngMetaData()
+        public PngMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="PngMetaData"/> class.
+        /// Initializes a new instance of the <see cref="PngMetadata"/> class.
         /// </summary>
         /// <param name="other">The metadata to create an instance from.</param>
-        private PngMetaData(PngMetaData other)
+        private PngMetadata(PngMetadata other)
         {
             this.BitDepth = other.BitDepth;
             this.ColorType = other.ColorType;
@@ -75,6 +75,6 @@ namespace SixLabors.ImageSharp.Formats.Png
         public bool HasTrans { get; set; }
 
         /// <inheritdoc/>
-        public IDeepCloneable DeepClone() => new PngMetaData(this);
+        public IDeepCloneable DeepClone() => new PngMetadata(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/IImageInfo.cs b/src/ImageSharp/IImageInfo.cs
index b1b1afc66f..b270c2c4de 100644
--- a/src/ImageSharp/IImageInfo.cs
+++ b/src/ImageSharp/IImageInfo.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 
 namespace SixLabors.ImageSharp
 {
@@ -30,6 +30,6 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Gets the metadata of the image.
         /// </summary>
-        ImageMetaData MetaData { get; }
+        ImageMetadata Metadata { get; }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image.Decode.cs b/src/ImageSharp/Image.Decode.cs
index ffdab25e24..9e83d173f2 100644
--- a/src/ImageSharp/Image.Decode.cs
+++ b/src/ImageSharp/Image.Decode.cs
@@ -5,7 +5,7 @@ using System.IO;
 using System.Linq;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
@@ -25,13 +25,13 @@ namespace SixLabors.ImageSharp
         /// <param name="configuration">The <see cref="Configuration"/></param>
         /// <param name="width">The width of the image</param>
         /// <param name="height">The height of the image</param>
-        /// <param name="metadata">The <see cref="ImageMetaData"/></param>
+        /// <param name="metadata">The <see cref="ImageMetadata"/></param>
         /// <returns>The result <see cref="Image{TPixel}"/></returns>
         internal static Image<TPixel> CreateUninitialized<TPixel>(
             Configuration configuration,
             int width,
             int height,
-            ImageMetaData metadata)
+            ImageMetadata metadata)
             where TPixel : struct, IPixel<TPixel>
         {
             Buffer2D<TPixel> uninitializedMemoryBuffer =
diff --git a/src/ImageSharp/Image.WrapMemory.cs b/src/ImageSharp/Image.WrapMemory.cs
index 4bb24a126b..3d788bb73a 100644
--- a/src/ImageSharp/Image.WrapMemory.cs
+++ b/src/ImageSharp/Image.WrapMemory.cs
@@ -5,7 +5,7 @@ using System;
 using System.Buffers;
 
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
@@ -24,18 +24,18 @@ namespace SixLabors.ImageSharp
         /// <param name="pixelMemory">The pixel memory.</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
-        /// <param name="metaData">The <see cref="ImageMetaData"/>.</param>
+        /// <param name="metadata">The <see cref="ImageMetadata"/>.</param>
         /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Configuration config,
             Memory<TPixel> pixelMemory,
             int width,
             int height,
-            ImageMetaData metaData)
+            ImageMetadata metadata)
             where TPixel : struct, IPixel<TPixel>
         {
             var memorySource = new MemorySource<TPixel>(pixelMemory);
-            return new Image<TPixel>(config, memorySource, width, height, metaData);
+            return new Image<TPixel>(config, memorySource, width, height, metadata);
         }
 
         /// <summary>
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp
             int height)
             where TPixel : struct, IPixel<TPixel>
         {
-            return WrapMemory(config, pixelMemory, width, height, new ImageMetaData());
+            return WrapMemory(config, pixelMemory, width, height, new ImageMetadata());
         }
 
         /// <summary>
@@ -89,18 +89,18 @@ namespace SixLabors.ImageSharp
         /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
-        /// <param name="metaData">The <see cref="ImageMetaData"/></param>
+        /// <param name="metadata">The <see cref="ImageMetadata"/></param>
         /// <returns>An <see cref="Image{TPixel}"/> instance</returns>
         public static Image<TPixel> WrapMemory<TPixel>(
             Configuration config,
             IMemoryOwner<TPixel> pixelMemoryOwner,
             int width,
             int height,
-            ImageMetaData metaData)
+            ImageMetadata metadata)
             where TPixel : struct, IPixel<TPixel>
         {
             var memorySource = new MemorySource<TPixel>(pixelMemoryOwner, false);
-            return new Image<TPixel>(config, memorySource, width, height, metaData);
+            return new Image<TPixel>(config, memorySource, width, height, metadata);
         }
 
         /// <summary>
@@ -123,7 +123,7 @@ namespace SixLabors.ImageSharp
             int height)
             where TPixel : struct, IPixel<TPixel>
         {
-            return WrapMemory(config, pixelMemoryOwner, width, height, new ImageMetaData());
+            return WrapMemory(config, pixelMemoryOwner, width, height, new ImageMetadata());
         }
 
         /// <summary>
diff --git a/src/ImageSharp/ImageFrameCollection.cs b/src/ImageSharp/ImageFrameCollection.cs
index bbe05ce435..7e516434cb 100644
--- a/src/ImageSharp/ImageFrameCollection.cs
+++ b/src/ImageSharp/ImageFrameCollection.cs
@@ -192,7 +192,7 @@ namespace SixLabors.ImageSharp
 
             this.frames.Remove(frame);
 
-            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.MetaData.DeepClone(), new[] { frame });
+            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { frame });
         }
 
         /// <summary>
@@ -205,7 +205,7 @@ namespace SixLabors.ImageSharp
         {
             ImageFrame<TPixel> frame = this[index];
             ImageFrame<TPixel> clonedFrame = frame.Clone();
-            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.MetaData.DeepClone(), new[] { clonedFrame });
+            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { clonedFrame });
         }
 
         /// <summary>
diff --git a/src/ImageSharp/ImageFrame{TPixel}.cs b/src/ImageSharp/ImageFrame{TPixel}.cs
index f69ae37574..4f0be59713 100644
--- a/src/ImageSharp/ImageFrame{TPixel}.cs
+++ b/src/ImageSharp/ImageFrame{TPixel}.cs
@@ -6,7 +6,7 @@ using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         internal ImageFrame(Configuration configuration, int width, int height)
-            : this(configuration, width, height, new ImageFrameMetaData())
+            : this(configuration, width, height, new ImageFrameMetadata())
         {
         }
 
@@ -39,9 +39,9 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="configuration">The configuration which allows altering default behaviour or extending the library.</param>
         /// <param name="size">The <see cref="Size"/> of the frame.</param>
-        /// <param name="metaData">The meta data.</param>
-        internal ImageFrame(Configuration configuration, Size size, ImageFrameMetaData metaData)
-            : this(configuration, size.Width, size.Height, metaData)
+        /// <param name="metadata">The metadata.</param>
+        internal ImageFrame(Configuration configuration, Size size, ImageFrameMetadata metadata)
+            : this(configuration, size.Width, size.Height, metadata)
         {
         }
 
@@ -51,9 +51,9 @@ namespace SixLabors.ImageSharp
         /// <param name="configuration">The configuration which allows altering default behaviour or extending the library.</param>
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
-        /// <param name="metaData">The meta data.</param>
-        internal ImageFrame(Configuration configuration, int width, int height, ImageFrameMetaData metaData)
-            : this(configuration, width, height, default(TPixel), metaData)
+        /// <param name="metadata">The metadata.</param>
+        internal ImageFrame(Configuration configuration, int width, int height, ImageFrameMetadata metadata)
+            : this(configuration, width, height, default(TPixel), metadata)
         {
         }
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="backgroundColor">The color to clear the image with.</param>
         internal ImageFrame(Configuration configuration, int width, int height, TPixel backgroundColor)
-            : this(configuration, width, height, backgroundColor, new ImageFrameMetaData())
+            : this(configuration, width, height, backgroundColor, new ImageFrameMetadata())
         {
         }
 
@@ -76,8 +76,8 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="backgroundColor">The color to clear the image with.</param>
-        /// <param name="metaData">The meta data.</param>
-        internal ImageFrame(Configuration configuration, int width, int height, TPixel backgroundColor, ImageFrameMetaData metaData)
+        /// <param name="metadata">The metadata.</param>
+        internal ImageFrame(Configuration configuration, int width, int height, TPixel backgroundColor, ImageFrameMetadata metadata)
         {
             Guard.NotNull(configuration, nameof(configuration));
             Guard.MustBeGreaterThan(width, 0, nameof(width));
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp
             this.Configuration = configuration;
             this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = this.MemoryAllocator.Allocate2D<TPixel>(width, height);
-            this.MetaData = metaData ?? new ImageFrameMetaData();
+            this.Metadata = metadata ?? new ImageFrameMetadata();
             this.Clear(configuration.GetParallelOptions(), backgroundColor);
         }
 
@@ -98,7 +98,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="memorySource">The memory source.</param>
         internal ImageFrame(Configuration configuration, int width, int height, MemorySource<TPixel> memorySource)
-            : this(configuration, width, height, memorySource, new ImageFrameMetaData())
+            : this(configuration, width, height, memorySource, new ImageFrameMetadata())
         {
         }
 
@@ -109,18 +109,18 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="memorySource">The memory source.</param>
-        /// <param name="metaData">The meta data.</param>
-        internal ImageFrame(Configuration configuration, int width, int height, MemorySource<TPixel> memorySource, ImageFrameMetaData metaData)
+        /// <param name="metadata">The metadata.</param>
+        internal ImageFrame(Configuration configuration, int width, int height, MemorySource<TPixel> memorySource, ImageFrameMetadata metadata)
         {
             Guard.NotNull(configuration, nameof(configuration));
             Guard.MustBeGreaterThan(width, 0, nameof(width));
             Guard.MustBeGreaterThan(height, 0, nameof(height));
-            Guard.NotNull(metaData, nameof(metaData));
+            Guard.NotNull(metadata, nameof(metadata));
 
             this.Configuration = configuration;
             this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = new Buffer2D<TPixel>(memorySource, width, height);
-            this.MetaData = metaData;
+            this.Metadata = metadata;
         }
 
         /// <summary>
@@ -137,7 +137,7 @@ namespace SixLabors.ImageSharp
             this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = this.MemoryAllocator.Allocate2D<TPixel>(source.PixelBuffer.Width, source.PixelBuffer.Height);
             source.PixelBuffer.GetSpan().CopyTo(this.PixelBuffer.GetSpan());
-            this.MetaData = source.MetaData.DeepClone();
+            this.Metadata = source.Metadata.DeepClone();
         }
 
         /// <summary>
@@ -169,9 +169,9 @@ namespace SixLabors.ImageSharp
         public int Height => this.PixelBuffer.Height;
 
         /// <summary>
-        /// Gets the meta data of the frame.
+        /// Gets the metadata of the frame.
         /// </summary>
-        public ImageFrameMetaData MetaData { get; }
+        public ImageFrameMetadata Metadata { get; }
 
         /// <summary>
         /// Gets or sets the pixel at the specified position.
@@ -289,7 +289,7 @@ namespace SixLabors.ImageSharp
                 return this.Clone(configuration) as ImageFrame<TPixel2>;
             }
 
-            var target = new ImageFrame<TPixel2>(configuration, this.Width, this.Height, this.MetaData.DeepClone());
+            var target = new ImageFrame<TPixel2>(configuration, this.Width, this.Height, this.Metadata.DeepClone());
 
             ParallelHelper.IterateRows(
                 this.Bounds(),
diff --git a/src/ImageSharp/ImageInfo.cs b/src/ImageSharp/ImageInfo.cs
index 6f894cb599..12dcf1ed74 100644
--- a/src/ImageSharp/ImageInfo.cs
+++ b/src/ImageSharp/ImageInfo.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 
 namespace SixLabors.ImageSharp
 {
@@ -17,13 +17,13 @@ namespace SixLabors.ImageSharp
         /// <param name="pixelType">The image pixel type information.</param>
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
-        /// <param name="metaData">The images metadata.</param>
-        public ImageInfo(PixelTypeInfo pixelType, int width, int height, ImageMetaData metaData)
+        /// <param name="metadata">The images metadata.</param>
+        public ImageInfo(PixelTypeInfo pixelType, int width, int height, ImageMetadata metadata)
         {
             this.PixelType = pixelType;
             this.Width = width;
             this.Height = height;
-            this.MetaData = metaData;
+            this.Metadata = metadata;
         }
 
         /// <inheritdoc />
@@ -36,6 +36,6 @@ namespace SixLabors.ImageSharp
         public int Height { get; }
 
         /// <inheritdoc />
-        public ImageMetaData MetaData { get; }
+        public ImageMetadata Metadata { get; }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 178194b21e..f2bef78e1a 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -9,7 +9,7 @@ using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         public Image(Configuration configuration, int width, int height)
-            : this(configuration, width, height, new ImageMetaData())
+            : this(configuration, width, height, new ImageMetadata())
         {
         }
 
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="backgroundColor">The color to initialize the pixels with.</param>
         public Image(Configuration configuration, int width, int height, TPixel backgroundColor)
-            : this(configuration, width, height, backgroundColor, new ImageMetaData())
+            : this(configuration, width, height, backgroundColor, new ImageMetadata())
         {
         }
 
@@ -67,11 +67,11 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
-        internal Image(Configuration configuration, int width, int height, ImageMetaData metadata)
+        internal Image(Configuration configuration, int width, int height, ImageMetadata metadata)
         {
             this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.MetaData = metadata ?? new ImageMetaData();
+            this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, default(TPixel));
         }
 
@@ -84,11 +84,11 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
-        internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetaData metadata)
+        internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetadata metadata)
         {
             this.configuration = configuration;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.MetaData = metadata;
+            this.Metadata = metadata;
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, memorySource);
         }
 
@@ -101,11 +101,11 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="backgroundColor">The color to initialize the pixels with.</param>
         /// <param name="metadata">The images metadata.</param>
-        internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetaData metadata)
+        internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetadata metadata)
         {
             this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.MetaData = metadata ?? new ImageMetaData();
+            this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, backgroundColor);
         }
 
@@ -116,11 +116,11 @@ namespace SixLabors.ImageSharp
         /// <param name="configuration">The configuration providing initialization code which allows extending the library.</param>
         /// <param name="metadata">The images metadata.</param>
         /// <param name="frames">The frames that will be owned by this image instance.</param>
-        internal Image(Configuration configuration, ImageMetaData metadata, IEnumerable<ImageFrame<TPixel>> frames)
+        internal Image(Configuration configuration, ImageMetadata metadata, IEnumerable<ImageFrame<TPixel>> frames)
         {
             this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.MetaData = metadata ?? new ImageMetaData();
+            this.Metadata = metadata ?? new ImageMetadata();
 
             this.Frames = new ImageFrameCollection<TPixel>(this, frames);
         }
@@ -140,7 +140,7 @@ namespace SixLabors.ImageSharp
         public int Height => this.Frames.RootFrame.Height;
 
         /// <inheritdoc/>
-        public ImageMetaData MetaData { get; }
+        public ImageMetadata Metadata { get; }
 
         /// <summary>
         /// Gets the frames.
@@ -193,7 +193,7 @@ namespace SixLabors.ImageSharp
         public Image<TPixel> Clone(Configuration configuration)
         {
             IEnumerable<ImageFrame<TPixel>> clonedFrames = this.Frames.Select(x => x.Clone(configuration));
-            return new Image<TPixel>(configuration, this.MetaData.DeepClone(), clonedFrames);
+            return new Image<TPixel>(configuration, this.Metadata.DeepClone(), clonedFrames);
         }
 
         /// <summary>
@@ -214,7 +214,7 @@ namespace SixLabors.ImageSharp
             where TPixel2 : struct, IPixel<TPixel2>
         {
             IEnumerable<ImageFrame<TPixel2>> clonedFrames = this.Frames.Select(x => x.CloneAs<TPixel2>(configuration));
-            return new Image<TPixel2>(configuration, this.MetaData.DeepClone(), clonedFrames);
+            return new Image<TPixel2>(configuration, this.Metadata.DeepClone(), clonedFrames);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/MetaData/FrameDecodingMode.cs b/src/ImageSharp/MetaData/FrameDecodingMode.cs
index 2863fbf8f9..835e43354a 100644
--- a/src/ImageSharp/MetaData/FrameDecodingMode.cs
+++ b/src/ImageSharp/MetaData/FrameDecodingMode.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData
+namespace SixLabors.ImageSharp.Metadata
 {
     /// <summary>
     /// Enumerated frame process modes to apply to multi-frame images.
diff --git a/src/ImageSharp/MetaData/ImageFrameMetaData.cs b/src/ImageSharp/MetaData/ImageFrameMetaData.cs
index f1f884be68..3858a7d0a3 100644
--- a/src/ImageSharp/MetaData/ImageFrameMetaData.cs
+++ b/src/ImageSharp/MetaData/ImageFrameMetaData.cs
@@ -4,62 +4,62 @@
 using System.Collections.Generic;
 using SixLabors.ImageSharp.Formats;
 
-namespace SixLabors.ImageSharp.MetaData
+namespace SixLabors.ImageSharp.Metadata
 {
     /// <summary>
     /// Encapsulates the metadata of an image frame.
     /// </summary>
-    public sealed class ImageFrameMetaData : IDeepCloneable<ImageFrameMetaData>
+    public sealed class ImageFrameMetadata : IDeepCloneable<ImageFrameMetadata>
     {
-        private readonly Dictionary<IImageFormat, IDeepCloneable> formatMetaData = new Dictionary<IImageFormat, IDeepCloneable>();
+        private readonly Dictionary<IImageFormat, IDeepCloneable> formatMetadata = new Dictionary<IImageFormat, IDeepCloneable>();
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ImageFrameMetaData"/> class.
+        /// Initializes a new instance of the <see cref="ImageFrameMetadata"/> class.
         /// </summary>
-        internal ImageFrameMetaData()
+        internal ImageFrameMetadata()
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ImageFrameMetaData"/> class
+        /// Initializes a new instance of the <see cref="ImageFrameMetadata"/> class
         /// by making a copy from other metadata.
         /// </summary>
         /// <param name="other">
-        /// The other <see cref="ImageFrameMetaData"/> to create this instance from.
+        /// The other <see cref="ImageFrameMetadata"/> to create this instance from.
         /// </param>
-        internal ImageFrameMetaData(ImageFrameMetaData other)
+        internal ImageFrameMetadata(ImageFrameMetadata other)
         {
             DebugGuard.NotNull(other, nameof(other));
 
-            foreach (KeyValuePair<IImageFormat, IDeepCloneable> meta in other.formatMetaData)
+            foreach (KeyValuePair<IImageFormat, IDeepCloneable> meta in other.formatMetadata)
             {
-                this.formatMetaData.Add(meta.Key, meta.Value.DeepClone());
+                this.formatMetadata.Add(meta.Key, meta.Value.DeepClone());
             }
         }
 
         /// <inheritdoc/>
-        public ImageFrameMetaData DeepClone() => new ImageFrameMetaData(this);
+        public ImageFrameMetadata DeepClone() => new ImageFrameMetadata(this);
 
         /// <summary>
         /// Gets the metadata value associated with the specified key.
         /// </summary>
-        /// <typeparam name="TFormatMetaData">The type of format metadata.</typeparam>
-        /// <typeparam name="TFormatFrameMetaData">The type of format frame metadata.</typeparam>
+        /// <typeparam name="TFormatMetadata">The type of format metadata.</typeparam>
+        /// <typeparam name="TFormatFrameMetadata">The type of format frame metadata.</typeparam>
         /// <param name="key">The key of the value to get.</param>
         /// <returns>
-        /// The <typeparamref name="TFormatFrameMetaData"/>.
+        /// The <typeparamref name="TFormatFrameMetadata"/>.
         /// </returns>
-        public TFormatFrameMetaData GetFormatMetaData<TFormatMetaData, TFormatFrameMetaData>(IImageFormat<TFormatMetaData, TFormatFrameMetaData> key)
-            where TFormatMetaData : class
-            where TFormatFrameMetaData : class, IDeepCloneable
+        public TFormatFrameMetadata GetFormatMetadata<TFormatMetadata, TFormatFrameMetadata>(IImageFormat<TFormatMetadata, TFormatFrameMetadata> key)
+            where TFormatMetadata : class
+            where TFormatFrameMetadata : class, IDeepCloneable
         {
-            if (this.formatMetaData.TryGetValue(key, out IDeepCloneable meta))
+            if (this.formatMetadata.TryGetValue(key, out IDeepCloneable meta))
             {
-                return (TFormatFrameMetaData)meta;
+                return (TFormatFrameMetadata)meta;
             }
 
-            TFormatFrameMetaData newMeta = key.CreateDefaultFormatFrameMetaData();
-            this.formatMetaData[key] = newMeta;
+            TFormatFrameMetadata newMeta = key.CreateDefaultFormatFrameMetadata();
+            this.formatMetadata[key] = newMeta;
             return newMeta;
         }
     }
diff --git a/src/ImageSharp/MetaData/ImageMetaData.cs b/src/ImageSharp/MetaData/ImageMetaData.cs
index 73549d98aa..b9efca4fee 100644
--- a/src/ImageSharp/MetaData/ImageMetaData.cs
+++ b/src/ImageSharp/MetaData/ImageMetaData.cs
@@ -3,15 +3,15 @@
 
 using System.Collections.Generic;
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
-namespace SixLabors.ImageSharp.MetaData
+namespace SixLabors.ImageSharp.Metadata
 {
     /// <summary>
     /// Encapsulates the metadata of an image.
     /// </summary>
-    public sealed class ImageMetaData : IDeepCloneable<ImageMetaData>
+    public sealed class ImageMetadata : IDeepCloneable<ImageMetadata>
     {
         /// <summary>
         /// The default horizontal resolution value (dots per inch) in x direction.
@@ -31,14 +31,14 @@ namespace SixLabors.ImageSharp.MetaData
         /// </summary>
         public const PixelResolutionUnit DefaultPixelResolutionUnits = PixelResolutionUnit.PixelsPerInch;
 
-        private readonly Dictionary<IImageFormat, IDeepCloneable> formatMetaData = new Dictionary<IImageFormat, IDeepCloneable>();
+        private readonly Dictionary<IImageFormat, IDeepCloneable> formatMetadata = new Dictionary<IImageFormat, IDeepCloneable>();
         private double horizontalResolution;
         private double verticalResolution;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ImageMetaData"/> class.
+        /// Initializes a new instance of the <see cref="ImageMetadata"/> class.
         /// </summary>
-        internal ImageMetaData()
+        internal ImageMetadata()
         {
             this.horizontalResolution = DefaultHorizontalResolution;
             this.verticalResolution = DefaultVerticalResolution;
@@ -46,21 +46,21 @@ namespace SixLabors.ImageSharp.MetaData
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ImageMetaData"/> class
+        /// Initializes a new instance of the <see cref="ImageMetadata"/> class
         /// by making a copy from other metadata.
         /// </summary>
         /// <param name="other">
-        /// The other <see cref="ImageMetaData"/> to create this instance from.
+        /// The other <see cref="ImageMetadata"/> to create this instance from.
         /// </param>
-        private ImageMetaData(ImageMetaData other)
+        private ImageMetadata(ImageMetadata other)
         {
             this.HorizontalResolution = other.HorizontalResolution;
             this.VerticalResolution = other.VerticalResolution;
             this.ResolutionUnits = other.ResolutionUnits;
 
-            foreach (KeyValuePair<IImageFormat, IDeepCloneable> meta in other.formatMetaData)
+            foreach (KeyValuePair<IImageFormat, IDeepCloneable> meta in other.formatMetadata)
             {
-                this.formatMetaData.Add(meta.Key, meta.Value.DeepClone());
+                this.formatMetadata.Add(meta.Key, meta.Value.DeepClone());
             }
 
             foreach (ImageProperty property in other.Properties)
@@ -135,26 +135,26 @@ namespace SixLabors.ImageSharp.MetaData
         /// <summary>
         /// Gets the metadata value associated with the specified key.
         /// </summary>
-        /// <typeparam name="TFormatMetaData">The type of metadata.</typeparam>
+        /// <typeparam name="TFormatMetadata">The type of metadata.</typeparam>
         /// <param name="key">The key of the value to get.</param>
         /// <returns>
-        /// The <typeparamref name="TFormatMetaData"/>.
+        /// The <typeparamref name="TFormatMetadata"/>.
         /// </returns>
-        public TFormatMetaData GetFormatMetaData<TFormatMetaData>(IImageFormat<TFormatMetaData> key)
-             where TFormatMetaData : class, IDeepCloneable
+        public TFormatMetadata GetFormatMetadata<TFormatMetadata>(IImageFormat<TFormatMetadata> key)
+             where TFormatMetadata : class, IDeepCloneable
         {
-            if (this.formatMetaData.TryGetValue(key, out IDeepCloneable meta))
+            if (this.formatMetadata.TryGetValue(key, out IDeepCloneable meta))
             {
-                return (TFormatMetaData)meta;
+                return (TFormatMetadata)meta;
             }
 
-            TFormatMetaData newMeta = key.CreateDefaultFormatMetaData();
-            this.formatMetaData[key] = newMeta;
+            TFormatMetadata newMeta = key.CreateDefaultFormatMetadata();
+            this.formatMetadata[key] = newMeta;
             return newMeta;
         }
 
         /// <inheritdoc/>
-        public ImageMetaData DeepClone() => new ImageMetaData(this);
+        public ImageMetadata DeepClone() => new ImageMetadata(this);
 
         /// <summary>
         /// Looks up a property with the provided name.
@@ -180,7 +180,7 @@ namespace SixLabors.ImageSharp.MetaData
         }
 
         /// <summary>
-        /// Synchronizes the profiles with the current meta data.
+        /// Synchronizes the profiles with the current metadata.
         /// </summary>
         internal void SyncProfiles() => this.ExifProfile?.Sync(this);
     }
diff --git a/src/ImageSharp/MetaData/ImageProperty.cs b/src/ImageSharp/MetaData/ImageProperty.cs
index 6d38b6bf13..905e42dab1 100644
--- a/src/ImageSharp/MetaData/ImageProperty.cs
+++ b/src/ImageSharp/MetaData/ImageProperty.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData
+namespace SixLabors.ImageSharp.Metadata
 {
     /// <summary>
     /// Stores meta information about a image, like the name of the author,
diff --git a/src/ImageSharp/MetaData/PixelResolutionUnit.cs b/src/ImageSharp/MetaData/PixelResolutionUnit.cs
index ce848004f7..661e7a308e 100644
--- a/src/ImageSharp/MetaData/PixelResolutionUnit.cs
+++ b/src/ImageSharp/MetaData/PixelResolutionUnit.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData
+namespace SixLabors.ImageSharp.Metadata
 {
     /// <summary>
     /// Provides enumeration of available pixel density units.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
index fb2a893d1c..c7112c47a3 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifConstants.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     internal static class ExifConstants
     {
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifDataType.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifDataType.cs
index 5bd38b195d..83e7f7fe8b 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifDataType.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifDataType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Specifies exif data types.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifParts.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifParts.cs
index b1b42ad433..d22dc730f9 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifParts.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifParts.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Specifies which parts will be written when the profile is added to an image.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
index 37ceaf10f6..3d90cb3a9e 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
@@ -7,7 +7,7 @@ using System.IO;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Represents an EXIF profile providing access to the collection of values.
@@ -249,13 +249,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
         public ExifProfile DeepClone() => new ExifProfile(this);
 
         /// <summary>
-        /// Synchronizes the profiles with the specified meta data.
+        /// Synchronizes the profiles with the specified metadata.
         /// </summary>
-        /// <param name="metaData">The meta data.</param>
-        internal void Sync(ImageMetaData metaData)
+        /// <param name="metadata">The metadata.</param>
+        internal void Sync(ImageMetadata metadata)
         {
-            this.SyncResolution(ExifTag.XResolution, metaData.HorizontalResolution);
-            this.SyncResolution(ExifTag.YResolution, metaData.VerticalResolution);
+            this.SyncResolution(ExifTag.XResolution, metadata.HorizontalResolution);
+            this.SyncResolution(ExifTag.YResolution, metadata.VerticalResolution);
         }
 
         private void SyncResolution(ExifTag tag, double resolution)
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
index cf95affb04..e40e6c26c2 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifReader.cs
@@ -10,7 +10,7 @@ using System.Runtime.CompilerServices;
 using System.Text;
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Reads and parses EXIF data from a byte array.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifTag.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifTag.cs
index 625f95b63d..ddd4591fac 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifTag.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifTag.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// All exif tags from the Exif standard 2.2
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifTagDescriptionAttribute.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifTagDescriptionAttribute.cs
index 286fdbe57f..0188c662ed 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifTagDescriptionAttribute.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifTagDescriptionAttribute.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Reflection;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Class that provides a description for an ExifTag value.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
index e999d00b86..0ed3a43b70 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifTags.cs
@@ -1,9 +1,9 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using static SixLabors.ImageSharp.MetaData.Profiles.Exif.ExifTag;
+using static SixLabors.ImageSharp.Metadata.Profiles.Exif.ExifTag;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     internal static class ExifTags
     {
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifValue.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifValue.cs
index 409c55253a..05a9f35c9b 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifValue.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifValue.cs
@@ -6,7 +6,7 @@ using System.Globalization;
 using System.Text;
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Represent the value of the EXIF profile.
diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifWriter.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifWriter.cs
index 9079526d5a..93fe7fbbee 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifWriter.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifWriter.cs
@@ -7,7 +7,7 @@ using System.Collections.Generic;
 using System.Text;
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Exif
+namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 {
     /// <summary>
     /// Contains methods for writing EXIF metadata.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccCurveSegment.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccCurveSegment.cs
index 516887bcd6..7bf1f84211 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccCurveSegment.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccCurveSegment.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A segment of a curve
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccFormulaCurveElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccFormulaCurveElement.cs
index d168c5c285..d013f6ef13 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccFormulaCurveElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccFormulaCurveElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A formula based curve segment
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
index 7076e51447..e1d362a7fe 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A one dimensional ICC curve.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccParametricCurve.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccParametricCurve.cs
index efc2ca5377..04a9faf7da 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccParametricCurve.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccParametricCurve.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A parametric curve
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
index de08485ac8..4f0345d352 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
@@ -5,7 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A response curve
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccSampledCurveElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccSampledCurveElement.cs
index d9badf5a80..4872bd2b08 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccSampledCurveElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccSampledCurveElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A sampled curve segment
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Curves.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Curves.cs
index b27083dc49..111911080e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Curves.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Curves.cs
@@ -3,7 +3,7 @@
 
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Lut.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Lut.cs
index f9d56b0fff..5262e3ee95 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Lut.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Lut.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Matrix.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Matrix.cs
index 495d73a784..3157b9ef38 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Matrix.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Matrix.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElement.cs
index 2b39b1d6c6..4253058288 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElement.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitives.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitives.cs
index 7dc8cf98aa..aacbbcc1dd 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitives.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitives.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Primitives.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Primitives.cs
index bb85a5ca3e..2cbf798ec2 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Primitives.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.Primitives.cs
@@ -6,7 +6,7 @@ using System.Buffers.Binary;
 using System.Runtime.CompilerServices;
 using System.Text;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntry.cs
index c572b7f210..3f330ef729 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntry.cs
@@ -5,7 +5,7 @@ using System;
 using System.Globalization;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.cs
index 91a28fd743..7d694bec6e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataReader/IccDataReader.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Text;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to read ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Curves.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Curves.cs
index d5f5d5a9b6..c48ba8ab7c 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Curves.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Curves.cs
@@ -3,7 +3,7 @@
 
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <content>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Lut.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Lut.cs
index 38a3dd457d..016bd8009a 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Lut.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Lut.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <content>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Matrix.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Matrix.cs
index 79b9132192..b0bd377cb3 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Matrix.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Matrix.cs
@@ -4,7 +4,7 @@
 using System.Numerics;
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElement.cs
index 48c6734aec..824a9bef61 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElement.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitives.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitives.cs
index 1a3c2c0ac5..e681f84b85 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitives.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitives.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Primitives.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Primitives.cs
index 404285b500..6c49eb0c43 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Primitives.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.Primitives.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Text;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
index 51ea2d4e4a..13fb023d38 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.cs
index 21b7b6421b..17f15df714 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.cs
@@ -4,7 +4,7 @@
 using System;
 using System.IO;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Provides methods to write ICC data types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccClutDataType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccClutDataType.cs
index fe0c9b8b59..71e68f6af1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccClutDataType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccClutDataType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Color lookup table data type
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorSpaceType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorSpaceType.cs
index 0913cda418..721545df36 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorSpaceType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorSpaceType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Color Space Type
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorantEncoding.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorantEncoding.cs
index bec71e0dbc..14b2dd960f 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorantEncoding.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccColorantEncoding.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Colorant Encoding
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveMeasurementEncodings.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveMeasurementEncodings.cs
index cfd2671e94..a620632da6 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveMeasurementEncodings.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveMeasurementEncodings.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Curve Measurement Encodings
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveSegmentSignature.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveSegmentSignature.cs
index e9b8cc26b8..9a5ae18052 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveSegmentSignature.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccCurveSegmentSignature.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Curve Segment Signature
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDataType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDataType.cs
index b13edb53f4..de1f116366 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDataType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDataType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Enumerates the basic data types as defined in ICC.1:2010 version 4.3.0.0
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDeviceAttribute.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDeviceAttribute.cs
index 88cca866dc..c8598b0e03 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDeviceAttribute.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccDeviceAttribute.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Device attributes. Can be combined with a logical OR
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccFormulaCurveType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccFormulaCurveType.cs
index 2a375b0d1c..11e5985af3 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccFormulaCurveType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccFormulaCurveType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Formula curve segment type
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMeasurementGeometry.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMeasurementGeometry.cs
index fe6575c41b..9373241949 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMeasurementGeometry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMeasurementGeometry.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Measurement Geometry
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMultiProcessElementSignature.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMultiProcessElementSignature.cs
index fe5d309228..d7f78889dc 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMultiProcessElementSignature.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccMultiProcessElementSignature.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Multi process element signature
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccParametricCurveType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccParametricCurveType.cs
index 374b4ad93b..fce08a3afe 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccParametricCurveType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccParametricCurveType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Formula curve segment type
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccPrimaryPlatformType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccPrimaryPlatformType.cs
index 1563078f72..035fd3d4d2 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccPrimaryPlatformType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccPrimaryPlatformType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Enumerates the primary platform/operating system framework for which the profile was created
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileClass.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileClass.cs
index 8f0427db27..3d59192a7b 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileClass.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileClass.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Profile Class Name
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileFlag.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileFlag.cs
index 1e9ec18e89..9fbe5b5b5a 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileFlag.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileFlag.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Profile flags. Can be combined with a logical OR.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileTag.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileTag.cs
index 61d34dca10..b19641e0fb 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileTag.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileTag.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 // ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Enumerates the ICC Profile Tags as defined in ICC.1:2010 version 4.3.0.0
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccRenderingIntent.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccRenderingIntent.cs
index 7cb9c00f39..8ae241b448 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccRenderingIntent.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccRenderingIntent.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Rendering intent
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningFlag.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningFlag.cs
index 839ab8c6b1..b43ad52c48 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningFlag.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningFlag.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Screening flags. Can be combined with a logical OR.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningSpotType.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningSpotType.cs
index f1d73c6268..0631892b62 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningSpotType.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccScreeningSpotType.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Enumerates the screening spot types
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccSignatureName.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccSignatureName.cs
index 4773ab6c2a..f93d22f3e4 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccSignatureName.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccSignatureName.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Signature Name
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardIlluminant.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardIlluminant.cs
index fe0c406576..fc8ebae5cd 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardIlluminant.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardIlluminant.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Standard Illuminant
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardObserver.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardObserver.cs
index a393c258b2..1454b28273 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardObserver.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccStandardObserver.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Standard Observer
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccTypeSignature.cs b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccTypeSignature.cs
index ad0db4df93..d7a18579e5 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccTypeSignature.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Enums/IccTypeSignature.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Type Signature
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Exceptions/InvalidIccProfileException.cs b/src/ImageSharp/MetaData/Profiles/ICC/Exceptions/InvalidIccProfileException.cs
index f690670419..019bf9202c 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Exceptions/InvalidIccProfileException.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Exceptions/InvalidIccProfileException.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Represents an error that happened while reading or writing a corrupt/invalid ICC profile
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccProfile.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccProfile.cs
index 5d75a6df9d..afdd7ebfb5 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccProfile.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccProfile.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Security.Cryptography;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Represents an ICC profile
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccProfileHeader.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccProfileHeader.cs
index 189b40275a..326dd351e7 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccProfileHeader.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccProfileHeader.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Contains all values of an ICC profile header.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccReader.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccReader.cs
index 9f9d373ae1..30a6de40d0 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccReader.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccReader.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Collections.Generic;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Reads and parses ICC data from a byte array
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccTagDataEntry.cs
index 4c6bb07858..658d4c2f1b 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The data of an ICC tag entry
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
index 91a3bba549..b5a7c830dd 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
@@ -4,7 +4,7 @@
 using System.Collections.Generic;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Contains methods for writing ICC profiles.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
index 09931a1f91..c825a35352 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A placeholder <see cref="IccMultiProcessElement"/> (might be used for future ICC versions)
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
index 6aba186326..7ee7f821d7 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A CLUT (color lookup table) element to process data
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
index 7585fc2128..d72aff3c92 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A set of curves to process data
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
index 7e0e1eda82..d6f42aea76 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A placeholder <see cref="IccMultiProcessElement"/> (might be used for future ICC versions)
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
index e6170f7680..0d8683397a 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
@@ -5,7 +5,7 @@ using System;
 
 using SixLabors.ImageSharp.Primitives;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A matrix element to process data
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
index db2d56cc3d..24649d8b50 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// An element to process data
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
index e9a812d8ca..b4d711f59e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The chromaticity tag type provides basic chromaticity data
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
index b5f8fd5c49..4136b9a389 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This tag specifies the laydown order in which colorants
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
index 9f2b4c90ad..28d01450c1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The purpose of this tag is to identify the colorants used in
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
index 4d393dfb33..bcf9d5c9e1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type contains the PostScript product name to which this profile
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
index 0d34d3ceba..f2205cbad5 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The type contains a one-dimensional table of double values.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
index 0b8367303d..6a0b6c05e8 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Text;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The dataType is a simple data structure that contains
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
index 104d243099..371397a6f8 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type is a representation of the time and date.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
index 0a114ea1f9..50bfca1756 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of doubles (from 32bit fixed point values).
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
index 415f6941ec..d84fc1431e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
@@ -5,7 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This structure represents a color transform using tables
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
index 04a49e316d..5c8ce2d2c9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
@@ -5,7 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This structure represents a color transform using tables
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
index f7c0946320..4cee555e51 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
@@ -5,7 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This structure represents a color transform.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
index 27572acd0b..8e9479ff83 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
@@ -5,7 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This structure represents a color transform.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
index 9247ca593f..ad3a9f2c36 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The measurementType information refers only to the internal
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
index 1a06eb5880..3084ff6121 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This tag structure contains a set of records each referencing
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
index f13fdb17fb..dc78e75200 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This structure represents a color transform, containing
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
index 957b8d5c3f..30516578fe 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The namedColor2Type is a count value and array of structures
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
index 9ec497d3be..752d05aae2 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The parametricCurveType describes a one-dimensional curve by
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
index ff69115267..3c3a6c7619 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type is an array of structures, each of which contains information
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
index c6cc0903c5..06e52cb637 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type is an array of structures, each of which contains information
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
index 494aa2888b..6051bf8414 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The purpose of this tag type is to provide a mechanism to relate physical
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
index a073291ad1..bf64e4fed0 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type describes various screening parameters including
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
index 287f0efb0c..87d369f85b 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Typically this type is used for registered tags that can
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextDescriptionTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextDescriptionTagDataEntry.cs
index 8e6f4bc196..4134779c3c 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextDescriptionTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextDescriptionTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Globalization;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The TextDescriptionType contains three types of text description.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
index ab3b3fb6fb..6cf9e91543 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This is a simple text structure that contains a text string.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
index 464cbb9e75..3e4a5ff3a9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of doubles (from 32bit values).
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
index 1e7a7f8a90..46799b16a9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of unsigned shorts.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
index affdc8720b..9fbbf8bf57 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of unsigned 32bit integers.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
index 36d48d6135..053181a26f 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of unsigned 64bit integers.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
index b2f2677575..099916d894 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents an array of bytes.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
index 510930e397..d28b6edc96 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type contains curves representing the under color removal and black generation
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
index a0089e7359..0227983fa1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This tag stores data of an unknown tag data entry
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
index bd636d4f2c..2b2893c388 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// This type represents a set of viewing condition parameters.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
index c1c14d8cbb..505b73a89f 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Numerics;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// The XYZType contains an array of XYZ values.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
index 3f7cad3afe..c53ba95201 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Color Lookup Table
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
index 4bcd1b6861..db1feea9ab 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccColorantTableEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Entry of ICC colorant table
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
index 1920e97fe1..b2852c8a33 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLocalizedString.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Globalization;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A string with a specific locale.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLut.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLut.cs
index c46d6884b6..9e0c6c40dd 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLut.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccLut.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Lookup Table
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
index b7cb5bc495..22bf1bb762 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A specific color with a name
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccPositionNumber.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccPositionNumber.cs
index 745312f563..c9b75903d9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccPositionNumber.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccPositionNumber.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Position of an object within an ICC profile
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
index 7e7c527ead..76ac5961d9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// ICC Profile description
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
index 710e6bb252..4a73f7e079 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileId.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// ICC Profile ID
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
index ae451c5db8..9eb9fc7c3e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Linq;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Description of a profile within a sequence.
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccResponseNumber.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccResponseNumber.cs
index 8cae869925..8590802638 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccResponseNumber.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccResponseNumber.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Associates a normalized device code with a measurement value
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
index 7e2072d5bb..354442b476 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccScreeningChannel.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// A single channel of a <see cref="IccScreeningTagDataEntry"/>
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
index 7713c4faa1..889dec41eb 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccTagTableEntry.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Entry of ICC tag table
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccVersion.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccVersion.cs
index 2486cc80a9..b388fa5a48 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccVersion.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccVersion.cs
@@ -3,7 +3,7 @@
 
 using System;
 
-namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
+namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
     /// Represents the ICC profile version number.
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
index 0f71c732dd..7633ed4418 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
@@ -53,10 +53,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
             IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.MetaData.DeepClone()));
+                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.MetaData.DeepClone(), frames);
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
index a610ae5bb3..5b9e3dde23 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.Primitives;
@@ -73,12 +73,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <returns>The <see cref="OrientationMode"/></returns>
         private static OrientationMode GetExifOrientation(Image<TPixel> source)
         {
-            if (source.MetaData.ExifProfile is null)
+            if (source.Metadata.ExifProfile is null)
             {
                 return OrientationMode.Unknown;
             }
 
-            ExifValue value = source.MetaData.ExifProfile.GetValue(ExifTag.Orientation);
+            ExifValue value = source.Metadata.ExifProfile.GetValue(ExifTag.Orientation);
             if (value is null)
             {
                 return OrientationMode.Unknown;
@@ -92,10 +92,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             else
             {
                 orientation = (OrientationMode)Convert.ToUInt16(value.Value);
-                source.MetaData.ExifProfile.RemoveValue(ExifTag.Orientation);
+                source.Metadata.ExifProfile.RemoveValue(ExifTag.Orientation);
             }
 
-            source.MetaData.ExifProfile.SetValue(ExifTag.Orientation, (ushort)OrientationMode.TopLeft);
+            source.Metadata.ExifProfile.SetValue(ExifTag.Orientation, (ushort)OrientationMode.TopLeft);
 
             return orientation;
         }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
index 3b1d7e94dd..5baa196a09 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
@@ -39,10 +39,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.CropRectangle.Width, this.CropRectangle.Height, x.MetaData.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.CropRectangle.Width, this.CropRectangle.Height, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.MetaData.DeepClone(), frames);
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
index 8a5d7563f4..6c7271c5ec 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
@@ -53,10 +53,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
             IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions.Width, this.TargetDimensions.Height, x.MetaData.DeepClone()));
+                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions.Width, this.TargetDimensions.Height, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.MetaData.DeepClone(), frames);
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 2c186a276b..21011ac717 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -151,10 +151,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.Width, this.Height, x.MetaData.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.Width, this.Height, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.MetaData.DeepClone(), frames);
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
index 69ecf59215..57902a5e6d 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
@@ -5,7 +5,7 @@ using System;
 using System.Numerics;
 
 using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <inheritdoc/>
         protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
         {
-            ExifProfile profile = destination.MetaData.ExifProfile;
+            ExifProfile profile = destination.Metadata.ExifProfile;
             if (profile is null)
             {
                 return;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
index f5536d0467..7bb666bce5 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         public static void UpdateDimensionalMetData<TPixel>(Image<TPixel> image)
             where TPixel : struct, IPixel<TPixel>
         {
-            ExifProfile profile = image.MetaData.ExifProfile;
+            ExifProfile profile = image.Metadata.ExifProfile;
             if (profile is null)
             {
                 return;
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index ad47ed1e7e..05fadd4584 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -13,7 +13,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests
 {
-    using SixLabors.ImageSharp.MetaData;
+    using SixLabors.ImageSharp.Metadata;
     using static TestImages.Bmp;
 
     public class BmpDecoderTests
@@ -237,7 +237,7 @@ namespace SixLabors.ImageSharp.Tests
                 var decoder = new BmpDecoder();
                 using (Image<Rgba32> image = decoder.Decode<Rgba32>(Configuration.Default, stream))
                 {
-                    ImageMetaData meta = image.MetaData;
+                    ImageMetadata meta = image.Metadata;
                     Assert.Equal(xResolution, meta.HorizontalResolution);
                     Assert.Equal(yResolution, meta.VerticalResolution);
                     Assert.Equal(resolutionUnit, meta.ResolutionUnits);
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index f818be8a91..c9745ef4f7 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -3,7 +3,7 @@
 
 using System.IO;
 using SixLabors.ImageSharp.Formats.Bmp;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using Xunit;
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.Tests
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        ImageMetaData meta = output.MetaData;
+                        ImageMetadata meta = output.Metadata;
                         Assert.Equal(xResolution, meta.HorizontalResolution);
                         Assert.Equal(yResolution, meta.VerticalResolution);
                         Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -80,7 +80,7 @@ namespace SixLabors.ImageSharp.Tests
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        BmpMetaData meta = output.MetaData.GetFormatMetaData(BmpFormat.Instance);
+                        BmpMetadata meta = output.Metadata.GetFormatMetadata(BmpFormat.Instance);
 
                         Assert.Equal(bmpBitsPerPixel, meta.BitsPerPixel);
                     }
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
index 991768a11a..ab72214f6c 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
@@ -11,8 +11,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [Fact]
         public void CloneIsDeep()
         {
-            var meta = new BmpMetaData() { BitsPerPixel = BmpBitsPerPixel.Pixel24 };
-            var clone = (BmpMetaData)meta.DeepClone();
+            var meta = new BmpMetadata() { BitsPerPixel = BmpBitsPerPixel.Pixel24 };
+            var clone = (BmpMetadata)meta.DeepClone();
 
             clone.BitsPerPixel = BmpBitsPerPixel.Pixel32;
 
diff --git a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
index aed1edfbf0..e8fdbd8926 100644
--- a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
+++ b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
@@ -27,8 +27,8 @@ namespace SixLabors.ImageSharp.Tests
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.MetaData.VerticalResolution = 150;
-                image.MetaData.HorizontalResolution = 150;
+                image.Metadata.VerticalResolution = 150;
+                image.Metadata.HorizontalResolution = 150;
                 image.DebugSave(provider);
             }
         }
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
index 5bfbb058be..b13362aa3b 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
@@ -7,7 +7,7 @@ using System.IO;
 using System.Text;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using Xunit;
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
-            { TestImages.Gif.Rings, (int)ImageMetaData.DefaultHorizontalResolution, (int)ImageMetaData.DefaultVerticalResolution , PixelResolutionUnit.PixelsPerInch},
+            { TestImages.Gif.Rings, (int)ImageMetadata.DefaultHorizontalResolution, (int)ImageMetadata.DefaultVerticalResolution , PixelResolutionUnit.PixelsPerInch},
             { TestImages.Gif.Ratio1x4, 1, 4 , PixelResolutionUnit.AspectRatio},
             { TestImages.Gif.Ratio4x1, 4, 1, PixelResolutionUnit.AspectRatio }
         };
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                 var decoder = new GifDecoder();
                 using (Image<Rgba32> image = decoder.Decode<Rgba32>(Configuration.Default, stream))
                 {
-                    ImageMetaData meta = image.MetaData;
+                    ImageMetadata meta = image.Metadata;
                     Assert.Equal(xResolution, meta.HorizontalResolution);
                     Assert.Equal(yResolution, meta.VerticalResolution);
                     Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -118,7 +118,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
             {
                 var decoder = new GifDecoder();
                 IImageInfo image = decoder.Identify(Configuration.Default, stream);
-                ImageMetaData meta = image.MetaData;
+                ImageMetadata meta = image.Metadata;
                 Assert.Equal(xResolution, meta.HorizontalResolution);
                 Assert.Equal(yResolution, meta.VerticalResolution);
                 Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -167,9 +167,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(1, image.MetaData.Properties.Count);
-                Assert.Equal("Comments", image.MetaData.Properties[0].Name);
-                Assert.Equal("ImageSharp", image.MetaData.Properties[0].Value);
+                Assert.Equal(1, image.Metadata.Properties.Count);
+                Assert.Equal("Comments", image.Metadata.Properties[0].Name);
+                Assert.Equal("ImageSharp", image.Metadata.Properties[0].Value);
             }
         }
 
@@ -185,7 +185,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(0, image.MetaData.Properties.Count);
+                Assert.Equal(0, image.Metadata.Properties.Count);
             }
         }
 
@@ -201,8 +201,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(1, image.MetaData.Properties.Count);
-                Assert.Equal("浉条卥慨灲", image.MetaData.Properties[0].Value);
+                Assert.Equal(1, image.Metadata.Properties.Count);
+                Assert.Equal("浉条卥慨灲", image.Metadata.Properties[0].Value);
             }
         }
 
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
index b74a7a85f9..cac4030d5f 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
@@ -3,7 +3,7 @@
 
 using System.IO;
 using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
-            { TestImages.Gif.Rings, (int)ImageMetaData.DefaultHorizontalResolution, (int)ImageMetaData.DefaultVerticalResolution , PixelResolutionUnit.PixelsPerInch},
+            { TestImages.Gif.Rings, (int)ImageMetadata.DefaultHorizontalResolution, (int)ImageMetadata.DefaultVerticalResolution , PixelResolutionUnit.PixelsPerInch},
             { TestImages.Gif.Ratio1x4, 1, 4 , PixelResolutionUnit.AspectRatio},
             { TestImages.Gif.Ratio4x1, 4, 1, PixelResolutionUnit.AspectRatio }
         };
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        ImageMetaData meta = output.MetaData;
+                        ImageMetadata meta = output.Metadata;
                         Assert.Equal(xResolution, meta.HorizontalResolution);
                         Assert.Equal(yResolution, meta.VerticalResolution);
                         Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -92,9 +92,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        Assert.Equal(1, output.MetaData.Properties.Count);
-                        Assert.Equal("Comments", output.MetaData.Properties[0].Name);
-                        Assert.Equal("ImageSharp", output.MetaData.Properties[0].Value);
+                        Assert.Equal(1, output.Metadata.Properties.Count);
+                        Assert.Equal("Comments", output.Metadata.Properties[0].Name);
+                        Assert.Equal("ImageSharp", output.Metadata.Properties[0].Value);
                     }
                 }
             }
@@ -109,7 +109,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             using (Image<Rgba32> input = testFile.CreateImage())
             {
-                input.MetaData.Properties.Clear();
+                input.Metadata.Properties.Clear();
                 using (var memStream = new MemoryStream())
                 {
                     input.SaveAsGif(memStream, options);
@@ -117,7 +117,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        Assert.Equal(0, output.MetaData.Properties.Count);
+                        Assert.Equal(0, output.Metadata.Properties.Count);
                     }
                 }
             }
@@ -129,7 +129,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
             using (var input = new Image<Rgba32>(1, 1))
             {
                 string comments = new string('c', 256);
-                input.MetaData.Properties.Add(new ImageProperty("Comments", comments));
+                input.Metadata.Properties.Add(new ImageProperty("Comments", comments));
 
                 using (var memStream = new MemoryStream())
                 {
@@ -138,9 +138,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        Assert.Equal(1, output.MetaData.Properties.Count);
-                        Assert.Equal("Comments", output.MetaData.Properties[0].Name);
-                        Assert.Equal(255, output.MetaData.Properties[0].Value.Length);
+                        Assert.Equal(1, output.Metadata.Properties.Count);
+                        Assert.Equal("Comments", output.Metadata.Properties[0].Name);
+                        Assert.Equal(255, output.Metadata.Properties[0].Value.Length);
                     }
                 }
             }
@@ -181,8 +181,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                 inStream.Position = 0;
 
                 var image = Image.Load(inStream);
-                GifMetaData metaData = image.MetaData.GetFormatMetaData(GifFormat.Instance);
-                GifFrameMetaData frameMetaData = image.Frames.RootFrame.MetaData.GetFormatMetaData(GifFormat.Instance);
+                GifMetadata metaData = image.Metadata.GetFormatMetadata(GifFormat.Instance);
+                GifFrameMetadata frameMetaData = image.Frames.RootFrame.Metadata.GetFormatMetadata(GifFormat.Instance);
                 GifColorTableMode colorMode = metaData.ColorTableMode;
                 var encoder = new GifEncoder()
                 {
@@ -196,7 +196,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                 outStream.Position = 0;
                 var clone = Image.Load(outStream);
 
-                GifMetaData cloneMetaData = clone.MetaData.GetFormatMetaData<GifMetaData>(GifFormat.Instance);
+                GifMetadata cloneMetaData = clone.Metadata.GetFormatMetadata<GifMetadata>(GifFormat.Instance);
                 Assert.Equal(metaData.ColorTableMode, cloneMetaData.ColorTableMode);
 
                 // Gifiddle and Cyotek GifInfo say this image has 64 colors.
@@ -204,8 +204,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
                 for (int i = 0; i < image.Frames.Count; i++)
                 {
-                    GifFrameMetaData ifm = image.Frames[i].MetaData.GetFormatMetaData(GifFormat.Instance);
-                    GifFrameMetaData cifm = clone.Frames[i].MetaData.GetFormatMetaData(GifFormat.Instance);
+                    GifFrameMetadata ifm = image.Frames[i].Metadata.GetFormatMetadata(GifFormat.Instance);
+                    GifFrameMetadata cifm = clone.Frames[i].Metadata.GetFormatMetadata(GifFormat.Instance);
 
                     Assert.Equal(ifm.ColorTableLength, cifm.ColorTableLength);
                     Assert.Equal(ifm.FrameDelay, cifm.FrameDelay);
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifFrameMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifFrameMetaDataTests.cs
index a39fc47b40..d82bfbf227 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifFrameMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifFrameMetaDataTests.cs
@@ -11,14 +11,14 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
         [Fact]
         public void CloneIsDeep()
         {
-            var meta = new GifFrameMetaData()
+            var meta = new GifFrameMetadata()
             {
                 FrameDelay = 1,
                 DisposalMethod = GifDisposalMethod.RestoreToBackground,
                 ColorTableLength = 2
             };
 
-            var clone = (GifFrameMetaData)meta.DeepClone();
+            var clone = (GifFrameMetadata)meta.DeepClone();
 
             clone.FrameDelay = 2;
             clone.DisposalMethod = GifDisposalMethod.RestoreToPrevious;
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifMetaDataTests.cs
index 29db32b4ab..8510a3461c 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifMetaDataTests.cs
@@ -11,14 +11,14 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
         [Fact]
         public void CloneIsDeep()
         {
-            var meta = new GifMetaData()
+            var meta = new GifMetadata()
             {
                 RepeatCount = 1,
                 ColorTableMode = GifColorTableMode.Global,
                 GlobalColorTableLength = 2
             };
 
-            var clone = (GifMetaData)meta.DeepClone();
+            var clone = (GifMetadata)meta.DeepClone();
 
             clone.RepeatCount = 2;
             clone.ColorTableMode = GifColorTableMode.Local;
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JFifMarkerTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JFifMarkerTests.cs
index b2dc3534d1..aebf80d082 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JFifMarkerTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JFifMarkerTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Jpg
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
index 1f1583a39f..48acc9ea47 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
@@ -3,8 +3,8 @@
 
 using System.IO;
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
 
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
     using System.Runtime.CompilerServices;
 
     using SixLabors.ImageSharp.Formats.Jpeg;
-    using SixLabors.ImageSharp.MetaData;
+    using SixLabors.ImageSharp.Metadata;
 
     public partial class JpegDecoderTests
     {
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 var decoder = new JpegDecoder();
                 using (Image<Rgba32> image = decoder.Decode<Rgba32>(Configuration.Default, stream))
                 {
-                    ImageMetaData meta = image.MetaData;
+                    ImageMetadata meta = image.Metadata;
                     Assert.Equal(xResolution, meta.HorizontalResolution);
                     Assert.Equal(yResolution, meta.VerticalResolution);
                     Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             {
                 var decoder = new JpegDecoder();
                 IImageInfo image = decoder.Identify(Configuration.Default, stream);
-                ImageMetaData meta = image.MetaData;
+                ImageMetadata meta = image.Metadata;
                 Assert.Equal(xResolution, meta.HorizontalResolution);
                 Assert.Equal(yResolution, meta.VerticalResolution);
                 Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -118,7 +118,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             {
                 var decoder = new JpegDecoder();
                 IImageInfo image = decoder.Identify(Configuration.Default, stream);
-                JpegMetaData meta = image.MetaData.GetFormatMetaData(JpegFormat.Instance);
+                JpegMetadata meta = image.Metadata.GetFormatMetadata(JpegFormat.Instance);
                 Assert.Equal(quality, meta.Quality);
             }
         }
@@ -133,7 +133,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 var decoder = new JpegDecoder();
                 using (Image<Rgba32> image = decoder.Decode<Rgba32>(Configuration.Default, stream))
                 {
-                    JpegMetaData meta = image.MetaData.GetFormatMetaData(JpegFormat.Instance);
+                    JpegMetadata meta = image.Metadata.GetFormatMetadata(JpegFormat.Instance);
                     Assert.Equal(quality, meta.Quality);
                 }
             }
@@ -180,7 +180,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                             Assert.Equal(bpp32, imageInfo.PixelType.BitsPerPixel);
                         }
 
-                        ExifProfile exifProfile = imageInfo.MetaData.ExifProfile;
+                        ExifProfile exifProfile = imageInfo.Metadata.ExifProfile;
 
                         if (exifProfilePresent)
                         {
@@ -192,7 +192,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                             Assert.Null(exifProfile);
                         }
 
-                        IccProfile iccProfile = imageInfo.MetaData.IccProfile;
+                        IccProfile iccProfile = imageInfo.Metadata.IccProfile;
 
                         if (iccProfilePresent)
                         {
@@ -220,13 +220,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             {
                 if (ignoreMetaData)
                 {
-                    Assert.Null(image.MetaData.ExifProfile);
-                    Assert.Null(image.MetaData.IccProfile);
+                    Assert.Null(image.Metadata.ExifProfile);
+                    Assert.Null(image.Metadata.IccProfile);
                 }
                 else
                 {
-                    Assert.NotNull(image.MetaData.ExifProfile);
-                    Assert.NotNull(image.MetaData.IccProfile);
+                    Assert.NotNull(image.Metadata.ExifProfile);
+                    Assert.NotNull(image.Metadata.IccProfile);
                 }
             }
         }
@@ -239,8 +239,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             TestImageInfo(TestImages.Jpeg.Baseline.Floorplan, JpegDecoder, useIdentify,
                 imageInfo =>
                     {
-                        Assert.Equal(300, imageInfo.MetaData.HorizontalResolution);
-                        Assert.Equal(300, imageInfo.MetaData.VerticalResolution);
+                        Assert.Equal(300, imageInfo.Metadata.HorizontalResolution);
+                        Assert.Equal(300, imageInfo.Metadata.VerticalResolution);
                     });
         }
 
@@ -252,8 +252,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             TestImageInfo(TestImages.Jpeg.Baseline.Jpeg420Exif, JpegDecoder, useIdentify,
                 imageInfo =>
                     {
-                        Assert.Equal(72, imageInfo.MetaData.HorizontalResolution);
-                        Assert.Equal(72, imageInfo.MetaData.VerticalResolution);
+                        Assert.Equal(72, imageInfo.Metadata.HorizontalResolution);
+                        Assert.Equal(72, imageInfo.Metadata.VerticalResolution);
                     });
         }
     }
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
index 598d99274a..618947130a 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
@@ -3,7 +3,7 @@
 
 using System.IO;
 using SixLabors.ImageSharp.Formats.Jpeg;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        JpegMetaData meta = output.MetaData.GetFormatMetaData(JpegFormat.Instance);
+                        JpegMetadata meta = output.Metadata.GetFormatMetadata(JpegFormat.Instance);
                         Assert.Equal(quality, meta.Quality);
                     }
                 }
@@ -189,7 +189,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        ImageMetaData meta = output.MetaData;
+                        ImageMetadata meta = output.Metadata;
                         Assert.Equal(xResolution, meta.HorizontalResolution);
                         Assert.Equal(yResolution, meta.VerticalResolution);
                         Assert.Equal(resolutionUnit, meta.ResolutionUnits);
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegMetaDataTests.cs
index 431de4be31..793bdd5229 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegMetaDataTests.cs
@@ -11,8 +11,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
         [Fact]
         public void CloneIsDeep()
         {
-            var meta = new JpegMetaData() { Quality = 50 };
-            var clone = (JpegMetaData)meta.DeepClone();
+            var meta = new JpegMetadata() { Quality = 50 };
+            var clone = (JpegMetadata)meta.DeepClone();
 
             clone.Quality = 99;
 
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index fe406c9924..0dbccd2509 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -8,7 +8,7 @@ using System.IO;
 using System.Text;
 
 using SixLabors.ImageSharp.Formats.Png;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
@@ -204,9 +204,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(1, image.MetaData.Properties.Count);
-                Assert.Equal("Software", image.MetaData.Properties[0].Name);
-                Assert.Equal("paint.net 4.0.6", image.MetaData.Properties[0].Value);
+                Assert.Equal(1, image.Metadata.Properties.Count);
+                Assert.Equal("Software", image.Metadata.Properties[0].Name);
+                Assert.Equal("paint.net 4.0.6", image.Metadata.Properties[0].Value);
             }
         }
 
@@ -222,7 +222,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(0, image.MetaData.Properties.Count);
+                Assert.Equal(0, image.Metadata.Properties.Count);
             }
         }
 
@@ -238,8 +238,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             using (Image<Rgba32> image = testFile.CreateImage(options))
             {
-                Assert.Equal(1, image.MetaData.Properties.Count);
-                Assert.Equal("潓瑦慷敲", image.MetaData.Properties[0].Name);
+                Assert.Equal(1, image.Metadata.Properties.Count);
+                Assert.Equal("潓瑦慷敲", image.Metadata.Properties[0].Name);
             }
         }
 
@@ -270,7 +270,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                 var decoder = new PngDecoder();
                 using (Image<Rgba32> image = decoder.Decode<Rgba32>(Configuration.Default, stream))
                 {
-                    ImageMetaData meta = image.MetaData;
+                    ImageMetadata meta = image.Metadata;
                     Assert.Equal(xResolution, meta.HorizontalResolution);
                     Assert.Equal(yResolution, meta.VerticalResolution);
                     Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -287,7 +287,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             {
                 var decoder = new PngDecoder();
                 IImageInfo image = decoder.Identify(Configuration.Default, stream);
-                ImageMetaData meta = image.MetaData;
+                ImageMetadata meta = image.Metadata;
                 Assert.Equal(xResolution, meta.HorizontalResolution);
                 Assert.Equal(yResolution, meta.VerticalResolution);
                 Assert.Equal(resolutionUnit, meta.ResolutionUnits);
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
index 9079b15fb0..5aa69dd6af 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
@@ -7,7 +7,7 @@ using System.Linq;
 
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Png;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
@@ -228,7 +228,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        ImageMetaData meta = output.MetaData;
+                        ImageMetadata meta = output.Metadata;
                         Assert.Equal(xResolution, meta.HorizontalResolution);
                         Assert.Equal(yResolution, meta.VerticalResolution);
                         Assert.Equal(resolutionUnit, meta.ResolutionUnits);
@@ -253,7 +253,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        PngMetaData meta = output.MetaData.GetFormatMetaData(PngFormat.Instance);
+                        PngMetadata meta = output.Metadata.GetFormatMetadata(PngFormat.Instance);
 
                         Assert.Equal(pngBitDepth, meta.BitDepth);
                     }
@@ -270,7 +270,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             var testFile = TestFile.Create(imagePath);
             using (Image<Rgba32> input = testFile.CreateImage())
             {
-                PngMetaData inMeta = input.MetaData.GetFormatMetaData(PngFormat.Instance);
+                PngMetadata inMeta = input.Metadata.GetFormatMetadata(PngFormat.Instance);
                 Assert.True(inMeta.HasTrans);
 
                 using (var memStream = new MemoryStream())
@@ -279,7 +279,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                     memStream.Position = 0;
                     using (var output = Image.Load<Rgba32>(memStream))
                     {
-                        PngMetaData outMeta = output.MetaData.GetFormatMetaData(PngFormat.Instance);
+                        PngMetadata outMeta = output.Metadata.GetFormatMetadata(PngFormat.Instance);
                         Assert.True(outMeta.HasTrans);
 
                         switch (pngColorType)
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngMetaDataTests.cs
index a21bb9acbe..72fc2f8656 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngMetaDataTests.cs
@@ -11,13 +11,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
         [Fact]
         public void CloneIsDeep()
         {
-            var meta = new PngMetaData()
+            var meta = new PngMetadata()
             {
                 BitDepth = PngBitDepth.Bit16,
                 ColorType = PngColorType.GrayscaleWithAlpha,
                 Gamma = 2
             };
-            var clone = (PngMetaData)meta.DeepClone();
+            var clone = (PngMetadata)meta.DeepClone();
 
             clone.BitDepth = PngBitDepth.Bit2;
             clone.ColorType = PngColorType.Palette;
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs b/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
index 16d999ad25..d51470292d 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
@@ -9,7 +9,7 @@ using System.Runtime.CompilerServices;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Common.Helpers;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Shapes;
 using SixLabors.ImageSharp.Processing;
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp.Tests
             public void WrapMemory_CreatedImageIsCorrect()
             {
                 Configuration cfg = Configuration.Default.Clone();
-                var metaData = new ImageMetaData();
+                var metaData = new ImageMetadata();
 
                 var array = new Rgba32[25];
                 var memory = new Memory<Rgba32>(array);
@@ -96,7 +96,7 @@ namespace SixLabors.ImageSharp.Tests
                     Assert.True(Unsafe.AreSame(ref array[0], ref pixel0));
 
                     Assert.Equal(cfg, image.GetConfiguration());
-                    Assert.Equal(metaData, image.MetaData);
+                    Assert.Equal(metaData, image.Metadata);
                 }
             }
 
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.cs b/tests/ImageSharp.Tests/Image/ImageTests.cs
index c5c7d19e1e..60384c0578 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Tests.Memory;
 
@@ -72,14 +72,14 @@ namespace SixLabors.ImageSharp.Tests
 
                 byte dirtyValue = 123;
                 configuration.MemoryAllocator = new TestMemoryAllocator(dirtyValue);
-                var metadata = new ImageMetaData();
+                var metadata = new ImageMetadata();
 
                 using (Image<Gray8> image = Image.CreateUninitialized<Gray8>(configuration, 21, 22, metadata))
                 {
                     Assert.Equal(21, image.Width);
                     Assert.Equal(22, image.Height);
                     Assert.Same(configuration, image.GetConfiguration());
-                    Assert.Same(metadata, image.MetaData);
+                    Assert.Same(metadata, image.Metadata);
 
                     Assert.Equal(dirtyValue, image[5, 5].PackedValue);
                 }
diff --git a/tests/ImageSharp.Tests/ImageInfoTests.cs b/tests/ImageSharp.Tests/ImageInfoTests.cs
index 91f6804c0f..67804a18fd 100644
--- a/tests/ImageSharp.Tests/ImageInfoTests.cs
+++ b/tests/ImageSharp.Tests/ImageInfoTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.Primitives;
 
 using Xunit;
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Tests
             var size = new Size(Width, Height);
             var rectangle = new Rectangle(0, 0, Width, Height);
             var pixelType = new PixelTypeInfo(8);
-            var meta = new ImageMetaData();
+            var meta = new ImageMetadata();
 
             var info = new ImageInfo(pixelType, Width, Height, meta);
 
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.Tests
             Assert.Equal(Height, info.Height);
             Assert.Equal(size, info.Size());
             Assert.Equal(rectangle, info.Bounds());
-            Assert.Equal(meta, info.MetaData);
+            Assert.Equal(meta, info.Metadata);
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/MetaData/ImageFrameMetaDataTests.cs b/tests/ImageSharp.Tests/MetaData/ImageFrameMetaDataTests.cs
index 8c49039603..bafb117f75 100644
--- a/tests/ImageSharp.Tests/MetaData/ImageFrameMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/ImageFrameMetaDataTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests
@@ -19,14 +19,14 @@ namespace SixLabors.ImageSharp.Tests
             const int colorTableLength = 128;
             const GifDisposalMethod disposalMethod = GifDisposalMethod.RestoreToBackground;
 
-            var metaData = new ImageFrameMetaData();
-            GifFrameMetaData gifFrameMetaData = metaData.GetFormatMetaData(GifFormat.Instance);
+            var metaData = new ImageFrameMetadata();
+            GifFrameMetadata gifFrameMetaData = metaData.GetFormatMetadata(GifFormat.Instance);
             gifFrameMetaData.FrameDelay = frameDelay;
             gifFrameMetaData.ColorTableLength = colorTableLength;
             gifFrameMetaData.DisposalMethod = disposalMethod;
 
-            var clone = new ImageFrameMetaData(metaData);
-            GifFrameMetaData cloneGifFrameMetaData = clone.GetFormatMetaData(GifFormat.Instance);
+            var clone = new ImageFrameMetadata(metaData);
+            GifFrameMetadata cloneGifFrameMetaData = clone.GetFormatMetadata(GifFormat.Instance);
 
             Assert.Equal(frameDelay, cloneGifFrameMetaData.FrameDelay);
             Assert.Equal(colorTableLength, cloneGifFrameMetaData.ColorTableLength);
@@ -36,9 +36,9 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void CloneIsDeep()
         {
-            var metaData = new ImageFrameMetaData();
-            ImageFrameMetaData clone = metaData.DeepClone();
-            Assert.False(metaData.GetFormatMetaData(GifFormat.Instance).Equals(clone.GetFormatMetaData(GifFormat.Instance)));
+            var metaData = new ImageFrameMetadata();
+            ImageFrameMetadata clone = metaData.DeepClone();
+            Assert.False(metaData.GetFormatMetadata(GifFormat.Instance).Equals(clone.GetFormatMetadata(GifFormat.Instance)));
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/MetaData/ImageMetaDataTests.cs b/tests/ImageSharp.Tests/MetaData/ImageMetaDataTests.cs
index b9619cb3f8..5f02ce7aeb 100644
--- a/tests/ImageSharp.Tests/MetaData/ImageMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/ImageMetaDataTests.cs
@@ -2,8 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 
@@ -12,14 +12,14 @@ using Xunit;
 namespace SixLabors.ImageSharp.Tests
 {
     /// <summary>
-    /// Tests the <see cref="ImageMetaData"/> class.
+    /// Tests the <see cref="ImageMetadata"/> class.
     /// </summary>
     public class ImageMetaDataTests
     {
         [Fact]
         public void ConstructorImageMetaData()
         {
-            var metaData = new ImageMetaData();
+            var metaData = new ImageMetadata();
 
             var exifProfile = new ExifProfile();
             var imageProperty = new ImageProperty("name", "value");
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.Tests
             metaData.VerticalResolution = 2;
             metaData.Properties.Add(imageProperty);
 
-            ImageMetaData clone = metaData.DeepClone();
+            ImageMetadata clone = metaData.DeepClone();
 
             Assert.Equal(exifProfile.ToByteArray(), clone.ExifProfile.ToByteArray());
             Assert.Equal(4, clone.HorizontalResolution);
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void CloneIsDeep()
         {
-            var metaData = new ImageMetaData();
+            var metaData = new ImageMetadata();
 
             var exifProfile = new ExifProfile();
             var imageProperty = new ImageProperty("name", "value");
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Tests
             metaData.VerticalResolution = 2;
             metaData.Properties.Add(imageProperty);
 
-            ImageMetaData clone = metaData.DeepClone();
+            ImageMetadata clone = metaData.DeepClone();
             clone.HorizontalResolution = 2;
             clone.VerticalResolution = 4;
 
@@ -58,13 +58,13 @@ namespace SixLabors.ImageSharp.Tests
             Assert.False(metaData.HorizontalResolution.Equals(clone.HorizontalResolution));
             Assert.False(metaData.VerticalResolution.Equals(clone.VerticalResolution));
             Assert.False(metaData.Properties.Equals(clone.Properties));
-            Assert.False(metaData.GetFormatMetaData(GifFormat.Instance).Equals(clone.GetFormatMetaData(GifFormat.Instance)));
+            Assert.False(metaData.GetFormatMetadata(GifFormat.Instance).Equals(clone.GetFormatMetadata(GifFormat.Instance)));
         }
 
         [Fact]
         public void HorizontalResolution()
         {
-            var metaData = new ImageMetaData();
+            var metaData = new ImageMetadata();
             Assert.Equal(96, metaData.HorizontalResolution);
 
             metaData.HorizontalResolution = 0;
@@ -80,7 +80,7 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void VerticalResolution()
         {
-            var metaData = new ImageMetaData();
+            var metaData = new ImageMetadata();
             Assert.Equal(96, metaData.VerticalResolution);
 
             metaData.VerticalResolution = 0;
@@ -101,14 +101,14 @@ namespace SixLabors.ImageSharp.Tests
             exifProfile.SetValue(ExifTag.YResolution, new Rational(300));
 
             var image = new Image<Rgba32>(1, 1);
-            image.MetaData.ExifProfile = exifProfile;
-            image.MetaData.HorizontalResolution = 400;
-            image.MetaData.VerticalResolution = 500;
+            image.Metadata.ExifProfile = exifProfile;
+            image.Metadata.HorizontalResolution = 400;
+            image.Metadata.VerticalResolution = 500;
 
-            image.MetaData.SyncProfiles();
+            image.Metadata.SyncProfiles();
 
-            Assert.Equal(400, ((Rational)image.MetaData.ExifProfile.GetValue(ExifTag.XResolution).Value).ToDouble());
-            Assert.Equal(500, ((Rational)image.MetaData.ExifProfile.GetValue(ExifTag.YResolution).Value).ToDouble());
+            Assert.Equal(400, ((Rational)image.Metadata.ExifProfile.GetValue(ExifTag.XResolution).Value).ToDouble());
+            Assert.Equal(500, ((Rational)image.Metadata.ExifProfile.GetValue(ExifTag.YResolution).Value).ToDouble());
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/MetaData/ImagePropertyTests.cs b/tests/ImageSharp.Tests/MetaData/ImagePropertyTests.cs
index b5886522a8..8cce5ba414 100644
--- a/tests/ImageSharp.Tests/MetaData/ImagePropertyTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/ImagePropertyTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
index c10ffb6c8e..9d145f3805 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
@@ -8,8 +8,8 @@ using System.IO;
 using System.Linq;
 using System.Text;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
-using SixLabors.ImageSharp.MetaData;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 
@@ -43,17 +43,17 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Calliphora).CreateImage();
 
-            Assert.Null(image.MetaData.ExifProfile);
+            Assert.Null(image.Metadata.ExifProfile);
 
-            image.MetaData.ExifProfile = new ExifProfile();
-            image.MetaData.ExifProfile.SetValue(ExifTag.Copyright, "Dirk Lemstra");
+            image.Metadata.ExifProfile = new ExifProfile();
+            image.Metadata.ExifProfile.SetValue(ExifTag.Copyright, "Dirk Lemstra");
 
             image = WriteAndRead(image, imageFormat);
 
-            Assert.NotNull(image.MetaData.ExifProfile);
-            Assert.Equal(1, image.MetaData.ExifProfile.Values.Count());
+            Assert.NotNull(image.Metadata.ExifProfile);
+            Assert.Equal(1, image.Metadata.ExifProfile.Values.Count());
 
-            ExifValue value = image.MetaData.ExifProfile.Values.FirstOrDefault(val => val.Tag == ExifTag.Copyright);
+            ExifValue value = image.Metadata.ExifProfile.Values.FirstOrDefault(val => val.Tag == ExifTag.Copyright);
             TestValue(value, "Dirk Lemstra");
         }
 
@@ -94,11 +94,11 @@ namespace SixLabors.ImageSharp.Tests
                 profile.SetValue(ExifTag.ExposureTime, new Rational(exposureTime));
 
                 var image = new Image<Rgba32>(1, 1);
-                image.MetaData.ExifProfile = profile;
+                image.Metadata.ExifProfile = profile;
 
                 image = WriteAndRead(image, imageFormat);
 
-                profile = image.MetaData.ExifProfile;
+                profile = image.Metadata.ExifProfile;
                 Assert.NotNull(profile);
 
                 ExifValue value = profile.GetValue(ExifTag.ExposureTime);
@@ -109,11 +109,11 @@ namespace SixLabors.ImageSharp.Tests
                 profile = GetExifProfile();
 
                 profile.SetValue(ExifTag.ExposureTime, new Rational(exposureTime, true));
-                image.MetaData.ExifProfile = profile;
+                image.Metadata.ExifProfile = profile;
 
                 image = WriteAndRead(image, imageFormat);
 
-                profile = image.MetaData.ExifProfile;
+                profile = image.Metadata.ExifProfile;
                 Assert.NotNull(profile);
 
                 value = profile.GetValue(ExifTag.ExposureTime);
@@ -127,24 +127,24 @@ namespace SixLabors.ImageSharp.Tests
         public void ReadWriteInfinity(TestImageWriteFormat imageFormat)
         {
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
-            image.MetaData.ExifProfile.SetValue(ExifTag.ExposureBiasValue, new SignedRational(double.PositiveInfinity));
+            image.Metadata.ExifProfile.SetValue(ExifTag.ExposureBiasValue, new SignedRational(double.PositiveInfinity));
 
             image = WriteAndReadJpeg(image);
-            ExifValue value = image.MetaData.ExifProfile.GetValue(ExifTag.ExposureBiasValue);
+            ExifValue value = image.Metadata.ExifProfile.GetValue(ExifTag.ExposureBiasValue);
             Assert.NotNull(value);
             Assert.Equal(new SignedRational(double.PositiveInfinity), value.Value);
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.ExposureBiasValue, new SignedRational(double.NegativeInfinity));
+            image.Metadata.ExifProfile.SetValue(ExifTag.ExposureBiasValue, new SignedRational(double.NegativeInfinity));
 
             image = WriteAndRead(image, imageFormat);
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.ExposureBiasValue);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.ExposureBiasValue);
             Assert.NotNull(value);
             Assert.Equal(new SignedRational(double.NegativeInfinity), value.Value);
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.FlashEnergy, new Rational(double.NegativeInfinity));
+            image.Metadata.ExifProfile.SetValue(ExifTag.FlashEnergy, new Rational(double.NegativeInfinity));
 
             image = WriteAndRead(image, imageFormat);
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.FlashEnergy);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.FlashEnergy);
             Assert.NotNull(value);
             Assert.Equal(new Rational(double.PositiveInfinity), value.Value);
         }
@@ -157,74 +157,74 @@ namespace SixLabors.ImageSharp.Tests
             var latitude = new Rational[] { new Rational(12.3), new Rational(4.56), new Rational(789.0) };
 
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
-            image.MetaData.ExifProfile.SetValue(ExifTag.Software, "ImageSharp");
+            image.Metadata.ExifProfile.SetValue(ExifTag.Software, "ImageSharp");
 
-            ExifValue value = image.MetaData.ExifProfile.GetValue(ExifTag.Software);
+            ExifValue value = image.Metadata.ExifProfile.GetValue(ExifTag.Software);
             TestValue(value, "ImageSharp");
 
             Assert.Throws<ArgumentException>(() => { value.WithValue(15); });
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.ShutterSpeedValue, new SignedRational(75.55));
+            image.Metadata.ExifProfile.SetValue(ExifTag.ShutterSpeedValue, new SignedRational(75.55));
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.ShutterSpeedValue);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.ShutterSpeedValue);
 
             TestValue(value, new SignedRational(7555, 100));
 
             Assert.Throws<ArgumentException>(() => { value.WithValue(75); });
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.XResolution, new Rational(150.0));
+            image.Metadata.ExifProfile.SetValue(ExifTag.XResolution, new Rational(150.0));
 
             // We also need to change this value because this overrides XResolution when the image is written.
-            image.MetaData.HorizontalResolution = 150.0;
+            image.Metadata.HorizontalResolution = 150.0;
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.XResolution);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.XResolution);
             TestValue(value, new Rational(150, 1));
 
             Assert.Throws<ArgumentException>(() => { value.WithValue("ImageSharp"); });
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.ReferenceBlackWhite, null);
+            image.Metadata.ExifProfile.SetValue(ExifTag.ReferenceBlackWhite, null);
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.ReferenceBlackWhite);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.ReferenceBlackWhite);
             TestValue(value, (string)null);
 
-            image.MetaData.ExifProfile.SetValue(ExifTag.GPSLatitude, latitude);
+            image.Metadata.ExifProfile.SetValue(ExifTag.GPSLatitude, latitude);
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.GPSLatitude);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.GPSLatitude);
             TestValue(value, latitude);
 
             image = WriteAndRead(image, imageFormat);
 
-            Assert.NotNull(image.MetaData.ExifProfile);
-            Assert.Equal(17, image.MetaData.ExifProfile.Values.Count());
+            Assert.NotNull(image.Metadata.ExifProfile);
+            Assert.Equal(17, image.Metadata.ExifProfile.Values.Count());
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.Software);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.Software);
             TestValue(value, "ImageSharp");
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.ShutterSpeedValue);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.ShutterSpeedValue);
             TestValue(value, new SignedRational(75.55));
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.XResolution);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.XResolution);
             TestValue(value, new Rational(150.0));
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.ReferenceBlackWhite);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.ReferenceBlackWhite);
             Assert.Null(value);
 
-            value = image.MetaData.ExifProfile.GetValue(ExifTag.GPSLatitude);
+            value = image.Metadata.ExifProfile.GetValue(ExifTag.GPSLatitude);
             TestValue(value, latitude);
 
-            image.MetaData.ExifProfile.Parts = ExifParts.ExifTags;
+            image.Metadata.ExifProfile.Parts = ExifParts.ExifTags;
 
             image = WriteAndRead(image, imageFormat);
 
-            Assert.NotNull(image.MetaData.ExifProfile);
-            Assert.Equal(8, image.MetaData.ExifProfile.Values.Count());
+            Assert.NotNull(image.Metadata.ExifProfile);
+            Assert.Equal(8, image.Metadata.ExifProfile.Values.Count());
 
-            Assert.NotNull(image.MetaData.ExifProfile.GetValue(ExifTag.ColorSpace));
-            Assert.True(image.MetaData.ExifProfile.RemoveValue(ExifTag.ColorSpace));
-            Assert.False(image.MetaData.ExifProfile.RemoveValue(ExifTag.ColorSpace));
-            Assert.Null(image.MetaData.ExifProfile.GetValue(ExifTag.ColorSpace));
+            Assert.NotNull(image.Metadata.ExifProfile.GetValue(ExifTag.ColorSpace));
+            Assert.True(image.Metadata.ExifProfile.RemoveValue(ExifTag.ColorSpace));
+            Assert.False(image.Metadata.ExifProfile.RemoveValue(ExifTag.ColorSpace));
+            Assert.Null(image.Metadata.ExifProfile.GetValue(ExifTag.ColorSpace));
 
-            Assert.Equal(7, image.MetaData.ExifProfile.Values.Count());
+            Assert.Equal(7, image.Metadata.ExifProfile.Values.Count());
         }
 
         [Fact]
@@ -234,7 +234,7 @@ namespace SixLabors.ImageSharp.Tests
             exifProfile.SetValue(ExifTag.XResolution, new Rational(200));
             exifProfile.SetValue(ExifTag.YResolution, new Rational(300));
 
-            var metaData = new ImageMetaData
+            var metaData = new ImageMetadata
             {
                 ExifProfile = exifProfile,
                 HorizontalResolution = 200,
@@ -292,13 +292,13 @@ namespace SixLabors.ImageSharp.Tests
             ExifProfile expectedProfile = CreateExifProfile();
             var expectedProfileTags = expectedProfile.Values.Select(x => x.Tag).ToList();
             expectedProfile.SetValue(exifValueToChange, junk.ToString());
-            image.MetaData.ExifProfile = expectedProfile;
+            image.Metadata.ExifProfile = expectedProfile;
 
             // act
             Image<Rgba32> reloadedImage = WriteAndRead(image, TestImageWriteFormat.Jpeg);
 
             // assert
-            ExifProfile actualProfile = reloadedImage.MetaData.ExifProfile;
+            ExifProfile actualProfile = reloadedImage.Metadata.ExifProfile;
             Assert.NotNull(actualProfile);
             foreach (ExifTag expectedProfileTag in expectedProfileTags)
             {
@@ -317,7 +317,7 @@ namespace SixLabors.ImageSharp.Tests
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Progressive.Bad.ExifUndefType).CreateImage();
             Assert.NotNull(image);
 
-            ExifProfile profile = image.MetaData.ExifProfile;
+            ExifProfile profile = image.Metadata.ExifProfile;
             Assert.NotNull(profile);
 
             foreach (ExifValue value in profile.Values)
@@ -335,7 +335,7 @@ namespace SixLabors.ImageSharp.Tests
             // This images contains array in the exif profile that has zero components.
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Issues.InvalidCast520).CreateImage();
 
-            ExifProfile profile = image.MetaData.ExifProfile;
+            ExifProfile profile = image.Metadata.ExifProfile;
             Assert.NotNull(profile);
 
             // Force parsing of the profile.
@@ -353,13 +353,13 @@ namespace SixLabors.ImageSharp.Tests
             // arrange
             var image = new Image<Rgba32>(1, 1);
             ExifProfile expected = CreateExifProfile();
-            image.MetaData.ExifProfile = expected;
+            image.Metadata.ExifProfile = expected;
 
             // act
             Image<Rgba32> reloadedImage = WriteAndRead(image, imageFormat);
 
             // assert
-            ExifProfile actual = reloadedImage.MetaData.ExifProfile;
+            ExifProfile actual = reloadedImage.Metadata.ExifProfile;
             Assert.NotNull(actual);
             foreach (KeyValuePair<ExifTag, object> expectedProfileValue in TestProfileValues)
             {
@@ -410,7 +410,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
 
-            ExifProfile profile = image.MetaData.ExifProfile;
+            ExifProfile profile = image.Metadata.ExifProfile;
             Assert.NotNull(profile);
 
             return profile;
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifReaderTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifReaderTests.cs
index c9542a98a9..19ff7d269a 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifReaderTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifReaderTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Collections.Generic;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifTagDescriptionAttributeTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifTagDescriptionAttributeTests.cs
index 2b8d4d7160..144a6e4a33 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifTagDescriptionAttributeTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifTagDescriptionAttributeTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
index 8bc192af5c..4327cae335 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Linq;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
 
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Tests
             ExifProfile profile;
             using (Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage())
             {
-                profile = image.MetaData.ExifProfile;
+                profile = image.Metadata.ExifProfile;
             }
 
             Assert.NotNull(profile);
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.CurvesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.CurvesTests.cs
index beca4db49f..b6fa98b61e 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.CurvesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.CurvesTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.LutTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.LutTests.cs
index 43a1ed7f47..04284cb496 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.LutTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.LutTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MatrixTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MatrixTests.cs
index 328cc3fa6a..7987e94102 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MatrixTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MatrixTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElementTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElementTests.cs
index 5599e80d19..f9e5428cd4 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElementTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.MultiProcessElementTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitivesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitivesTests.cs
index 86f308ea19..6296390a0a 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitivesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.NonPrimitivesTests.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.PrimitivesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.PrimitivesTests.cs
index f8924c43cc..e73ee7c9e9 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.PrimitivesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.PrimitivesTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntryTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntryTests.cs
index aba587846a..dc2c5b6acc 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntryTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReader.TagDataEntryTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReaderTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReaderTests.cs
index a3e5a20f68..fc3502e3e3 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReaderTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataReader/IccDataReaderTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.CurvesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.CurvesTests.cs
index 6a47c988cd..585bda648b 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.CurvesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.CurvesTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.LutTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.LutTests.cs
index 9286ac815e..621673ce42 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.LutTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.LutTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
index 71dd18621c..b43c17f791 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
@@ -3,7 +3,7 @@
 
 using System.Numerics;
 using SixLabors.Memory;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElementTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElementTests.cs
index 43165c617d..829b556afb 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElementTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MultiProcessElementTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitivesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitivesTests.cs
index 1d482e2c1c..ed8a10551e 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitivesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.NonPrimitivesTests.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.PrimitivesTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.PrimitivesTests.cs
index 845a149b5d..098950be85 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.PrimitivesTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.PrimitivesTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntryTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntryTests.cs
index f3ef5effbe..269a8d561b 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntryTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntryTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriterTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriterTests.cs
index a3f796275a..b7b446699c 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriterTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriterTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccProfileTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccProfileTests.cs
index 17b5dacc4c..a1944669d0 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccProfileTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccProfileTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccReaderTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccReaderTests.cs
index c91076afc9..b4ed52a3d9 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccReaderTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccReaderTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccWriterTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccWriterTests.cs
index 99ae73f49a..43c27335a9 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccWriterTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/IccWriterTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/Various/IccProfileIdTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/Various/IccProfileIdTests.cs
index 46b8b31b40..5c80ac36b6 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/Various/IccProfileIdTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/Various/IccProfileIdTests.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Icc
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
index 9b37fb266a..28b01061ea 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
@@ -45,8 +45,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.MetaData.ExifProfile = new ExifProfile();
-                image.MetaData.ExifProfile.SetValue(ExifTag.Orientation, orientation);
+                image.Metadata.ExifProfile = new ExifProfile();
+                image.Metadata.ExifProfile.SetValue(ExifTag.Orientation, orientation);
 
                 image.Mutate(x => x.RotateFlip(rotateType, flipType));
                 image.DebugSave(provider, string.Join("_", rotateType, flipType, orientation, "1_before"));
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.MetaData.ExifProfile = new ExifProfile(bytes);
+                image.Metadata.ExifProfile = new ExifProfile(bytes);
                 image.Mutate(x => x.AutoOrient());
             }
         }
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
index 909e505357..a62f4fc7c6 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using Xunit;
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             using (var img = new Image<Alpha8>(xy, xy))
             {
                 var profile = new ExifProfile();
-                img.MetaData.ExifProfile = profile;
+                img.Metadata.ExifProfile = profile;
                 profile.SetValue(ExifTag.PixelXDimension, (uint)xy);
                 profile.SetValue(ExifTag.PixelYDimension, (uint)xy);
 
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataCurves.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataCurves.cs
index b39892a81d..334ee026db 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataCurves.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataCurves.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataLut.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataLut.cs
index 4ab0b0f6b0..5ef2156c71 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataLut.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataLut.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataMultiProcessElements.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataMultiProcessElements.cs
index fb648198da..586e846801 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataMultiProcessElements.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataMultiProcessElements.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataNonPrimitives.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataNonPrimitives.cs
index f16da90c65..f19029f8cc 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataNonPrimitives.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataNonPrimitives.cs
@@ -4,7 +4,7 @@
 using System;
 using System.Globalization;
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataProfiles.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataProfiles.cs
index b037a7a9af..49ff190467 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataProfiles.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataProfiles.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataTagDataEntry.cs b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataTagDataEntry.cs
index f7c4efa928..b5da224435 100644
--- a/tests/ImageSharp.Tests/TestDataIcc/IccTestDataTagDataEntry.cs
+++ b/tests/ImageSharp.Tests/TestDataIcc/IccTestDataTagDataEntry.cs
@@ -3,7 +3,7 @@
 
 using System.Globalization;
 using System.Numerics;
-using SixLabors.ImageSharp.MetaData.Profiles.Icc;
+using SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
 namespace SixLabors.ImageSharp.Tests
 {
diff --git a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
index 427a565424..7a775c0817 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
@@ -4,7 +4,7 @@
 using System.IO;
 
 using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.MetaData;
+using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
             using (var sourceBitmap = new System.Drawing.Bitmap(stream))
             {
                 var pixelType = new PixelTypeInfo(System.Drawing.Image.GetPixelFormatSize(sourceBitmap.PixelFormat));
-                return new ImageInfo(pixelType, sourceBitmap.Width, sourceBitmap.Height, new ImageMetaData());
+                return new ImageInfo(pixelType, sourceBitmap.Width, sourceBitmap.Height, new ImageMetadata());
             }
         }
     }

From c16e443f04dcd7c27da8949d430e98b7cea48ac7 Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Sat, 13 Apr 2019 07:40:48 -0500
Subject: [PATCH 054/223] Nits - Colorspaces (#880)

* Add missing periods

* Only perform matrix inversion once in CieXyzToLinearRgbConverter

* Eliminate unnessary ToVector3 call

* Seal GammaWorkingSpace

* Address stylecop violation

* Add periods

* Fix colorspace companding
---
 .../ColorSpaces/CieXyChromaticityCoordinates.cs   |  2 +-
 .../ColorSpaces/Companding/GammaCompanding.cs     |  2 +-
 .../ColorSpaces/Companding/LCompanding.cs         |  6 +++---
 .../ColorSpaces/Companding/Rec2020Companding.cs   | 13 +++++++++----
 .../ColorSpaces/Companding/Rec709Companding.cs    |  6 ++++--
 .../Conversion/ColorSpaceConverter.CieLch.cs      |  2 --
 .../Converters/CieXyzAndCieXyyConverter.cs        |  2 +-
 .../Converters/CieXyzToLinearRgbConverter.cs      | 14 +++++++++-----
 .../Converters/CmykAndRgbConverter.cs             |  4 ++--
 .../Converters/LinearRgbToRgbConverter.cs         | 15 +++++++--------
 .../Converters/RgbToLinearRgbConverter.cs         | 15 +++++++--------
 .../Converters/YCbCrAndRgbConverter.cs            |  4 ++--
 .../WorkingSpaces/GammaWorkingSpace.cs            |  2 +-
 .../Colorspaces/Companding/CompandingTests.cs     | 15 ++++++---------
 14 files changed, 53 insertions(+), 49 deletions(-)

diff --git a/src/ImageSharp/ColorSpaces/CieXyChromaticityCoordinates.cs b/src/ImageSharp/ColorSpaces/CieXyChromaticityCoordinates.cs
index 49c1da9f10..8e14274f66 100644
--- a/src/ImageSharp/ColorSpaces/CieXyChromaticityCoordinates.cs
+++ b/src/ImageSharp/ColorSpaces/CieXyChromaticityCoordinates.cs
@@ -8,7 +8,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Represents the coordinates of CIEXY chromaticity space
+    /// Represents the coordinates of CIEXY chromaticity space.
     /// </summary>
     public readonly struct CieXyChromaticityCoordinates : IEquatable<CieXyChromaticityCoordinates>
     {
diff --git a/src/ImageSharp/ColorSpaces/Companding/GammaCompanding.cs b/src/ImageSharp/ColorSpaces/Companding/GammaCompanding.cs
index 13cca1582d..09b324b00f 100644
--- a/src/ImageSharp/ColorSpaces/Companding/GammaCompanding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/GammaCompanding.cs
@@ -7,7 +7,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Companding
 {
     /// <summary>
-    /// Implements gamma companding
+    /// Implements gamma companding.
     /// </summary>
     /// <remarks>
     /// <see href="http://www.brucelindbloom.com/index.html?Eqn_RGB_to_XYZ.html"/>
diff --git a/src/ImageSharp/ColorSpaces/Companding/LCompanding.cs b/src/ImageSharp/ColorSpaces/Companding/LCompanding.cs
index 9e2cf8ad86..80b8aee7e7 100644
--- a/src/ImageSharp/ColorSpaces/Companding/LCompanding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/LCompanding.cs
@@ -8,7 +8,7 @@ using SixLabors.ImageSharp.ColorSpaces.Conversion;
 namespace SixLabors.ImageSharp.ColorSpaces.Companding
 {
     /// <summary>
-    /// Implements L* companding
+    /// Implements L* companding.
     /// </summary>
     /// <remarks>
     /// For more info see:
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the linear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Expand(float channel)
-            => channel <= 0.08 ? 100 * channel / CieConstants.Kappa : ImageMaths.Pow3((channel + 0.16F) / 1.16F);
+            => channel <= 0.08F ? (100F * channel) / CieConstants.Kappa : ImageMaths.Pow3((channel + 0.16F) / 1.16F);
 
         /// <summary>
         /// Compresses an uncompanded channel (linear) to its nonlinear equivalent.
@@ -33,6 +33,6 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the nonlinear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Compress(float channel)
-            => channel <= CieConstants.Epsilon ? channel * CieConstants.Kappa / 100F : MathF.Pow(1.16F * channel, 0.3333333F) - 0.16F;
+            => channel <= CieConstants.Epsilon ? (channel * CieConstants.Kappa) / 100F : (1.16F * MathF.Pow(channel, 0.3333333F)) - 0.16F;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Companding/Rec2020Companding.cs b/src/ImageSharp/ColorSpaces/Companding/Rec2020Companding.cs
index a3a9121727..773fe81647 100644
--- a/src/ImageSharp/ColorSpaces/Companding/Rec2020Companding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/Rec2020Companding.cs
@@ -7,14 +7,19 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Companding
 {
     /// <summary>
-    /// Implements Rec. 2020 companding function (for 12-bits).
+    /// Implements Rec. 2020 companding function.
     /// </summary>
     /// <remarks>
     /// <see href="http://en.wikipedia.org/wiki/Rec._2020"/>
-    /// For 10-bits, companding is identical to <see cref="Rec709Companding"/>
     /// </remarks>
     public static class Rec2020Companding
     {
+        private const float Alpha = 1.09929682680944F;
+        private const float AlphaMinusOne = Alpha - 1F;
+        private const float Beta = 0.018053968510807F;
+        private const float InverseBeta = Beta * 4.5F;
+        private const float Epsilon = 1 / 0.45F;
+
         /// <summary>
         /// Expands a companded channel to its linear equivalent with respect to the energy.
         /// </summary>
@@ -22,7 +27,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the linear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Expand(float channel)
-            => channel < 0.08145F ? channel / 4.5F : MathF.Pow((channel + 0.0993F) / 1.0993F, 2.222222F);
+            => channel < InverseBeta ? channel / 4.5F : MathF.Pow((channel + AlphaMinusOne) / Alpha, Epsilon);
 
         /// <summary>
         /// Compresses an uncompanded channel (linear) to its nonlinear equivalent.
@@ -31,6 +36,6 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the nonlinear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Compress(float channel)
-            => channel < 0.0181F ? 4500F * channel : (1.0993F * channel) - 0.0993F;
+            => channel < Beta ? 4.5F * channel : (Alpha * MathF.Pow(channel, 0.45F)) - AlphaMinusOne;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Companding/Rec709Companding.cs b/src/ImageSharp/ColorSpaces/Companding/Rec709Companding.cs
index e2e802d08a..edc0b9763f 100644
--- a/src/ImageSharp/ColorSpaces/Companding/Rec709Companding.cs
+++ b/src/ImageSharp/ColorSpaces/Companding/Rec709Companding.cs
@@ -14,6 +14,8 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
     /// </remarks>
     public static class Rec709Companding
     {
+        private const float Epsilon = 1 / 0.45F;
+
         /// <summary>
         /// Expands a companded channel to its linear equivalent with respect to the energy.
         /// </summary>
@@ -21,7 +23,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the linear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Expand(float channel)
-            => channel < 0.081F ? channel / 4.5F : MathF.Pow((channel + 0.099F) / 1.099F, 2.222222F);
+            => channel < 0.081F ? channel / 4.5F : MathF.Pow((channel + 0.099F) / 1.099F, Epsilon);
 
         /// <summary>
         /// Compresses an uncompanded channel (linear) to its nonlinear equivalent.
@@ -30,6 +32,6 @@ namespace SixLabors.ImageSharp.ColorSpaces.Companding
         /// <returns>The <see cref="float"/> representing the nonlinear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Compress(float channel)
-            => channel < 0.018F ? 4500F * channel : (1.099F * channel) - 0.099F;
+            => channel < 0.018F ? 4.5F * channel : (1.099F * MathF.Pow(channel, 0.45F)) - 0.099F;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
index 3810736197..7f4abfa7bb 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
@@ -26,10 +26,8 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// <returns>The <see cref="CieLch"/></returns>
         public CieLch ToCieLch(in CieLab color)
         {
-            // Adaptation
             CieLab adapted = this.Adapt(color);
 
-            // Conversion
             return CieLabToCieLchConverter.Convert(adapted);
         }
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzAndCieXyyConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzAndCieXyyConverter.cs
index f33d1ddcc9..7767b7b448 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzAndCieXyyConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzAndCieXyyConverter.cs
@@ -7,7 +7,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
-    /// Color converter between CIE XYZ and CIE xyY
+    /// Color converter between CIE XYZ and CIE xyY.
     /// <see href="http://www.brucelindbloom.com/"/> for formulas.
     /// </summary>
     internal sealed class CieXyzAndCieXyyConverter
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
index 3812cdbdd8..f166e4c14a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
@@ -28,11 +28,15 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         public CieXyzToLinearRgbConverter(RgbWorkingSpaceBase workingSpace)
         {
             this.TargetWorkingSpace = workingSpace;
-            this.conversionMatrix = GetRgbToCieXyzMatrix(workingSpace);
+
+            // Gets the inverted Rgb -> Xyz matrix
+            Matrix4x4.Invert(GetRgbToCieXyzMatrix(workingSpace), out Matrix4x4 inverted);
+
+            this.conversionMatrix = inverted;
         }
 
         /// <summary>
-        /// Gets the target working space
+        /// Gets the target working space.
         /// </summary>
         public RgbWorkingSpaceBase TargetWorkingSpace { get; }
 
@@ -40,12 +44,12 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="CieXyz"/> input to an instance of <see cref="LinearRgb"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public LinearRgb Convert(in CieXyz input)
         {
-            Matrix4x4.Invert(this.conversionMatrix, out Matrix4x4 inverted);
-            var vector = Vector3.Transform(input.ToVector3(), inverted);
+            var vector = Vector3.Transform(input.ToVector3(), this.conversionMatrix);
+
             return new LinearRgb(vector, this.TargetWorkingSpace);
         }
     }
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CmykAndRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CmykAndRgbConverter.cs
index 29fd32905b..0700dab43a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CmykAndRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CmykAndRgbConverter.cs
@@ -8,7 +8,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
-    /// Color converter between <see cref="Cmyk"/> and <see cref="Rgb"/>
+    /// Color converter between <see cref="Cmyk"/> and <see cref="Rgb"/>.
     /// </summary>
     internal sealed class CmykAndRgbConverter
     {
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="Rgb"/> input to an instance of <see cref="Cmyk"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public Cmyk Convert(in Rgb input)
         {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToRgbConverter.cs
index 1cc055bee2..8454430935 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToRgbConverter.cs
@@ -6,7 +6,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
-    /// Color converter between <see cref="LinearRgb"/> and <see cref="Rgb"/>
+    /// Color converter between <see cref="LinearRgb"/> and <see cref="Rgb"/>.
     /// </summary>
     internal sealed class LinearRgbToRgbConverter
     {
@@ -14,16 +14,15 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="LinearRgb"/> input to an instance of <see cref="Rgb"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public Rgb Convert(in LinearRgb input)
         {
-            var vector = input.ToVector3();
-            vector.X = input.WorkingSpace.Compress(vector.X);
-            vector.Y = input.WorkingSpace.Compress(vector.Y);
-            vector.Z = input.WorkingSpace.Compress(vector.Z);
-
-            return new Rgb(vector, input.WorkingSpace);
+            return new Rgb(
+                r: input.WorkingSpace.Compress(input.R),
+                g: input.WorkingSpace.Compress(input.G),
+                b: input.WorkingSpace.Compress(input.B),
+                workingSpace: input.WorkingSpace);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/RgbToLinearRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/RgbToLinearRgbConverter.cs
index 03912a421e..4ddbe42e54 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/RgbToLinearRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/RgbToLinearRgbConverter.cs
@@ -6,7 +6,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
-    /// Color converter between Rgb and LinearRgb
+    /// Color converter between Rgb and LinearRgb.
     /// </summary>
     internal class RgbToLinearRgbConverter
     {
@@ -14,16 +14,15 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="Rgb"/> input to an instance of <see cref="LinearRgb"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public LinearRgb Convert(in Rgb input)
         {
-            var vector = input.ToVector3();
-            vector.X = input.WorkingSpace.Expand(vector.X);
-            vector.Y = input.WorkingSpace.Expand(vector.Y);
-            vector.Z = input.WorkingSpace.Expand(vector.Z);
-
-            return new LinearRgb(vector, input.WorkingSpace);
+            return new LinearRgb(
+                r: input.WorkingSpace.Expand(input.R),
+                g: input.WorkingSpace.Expand(input.G),
+                b: input.WorkingSpace.Expand(input.B),
+                workingSpace: input.WorkingSpace);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/YCbCrAndRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/YCbCrAndRgbConverter.cs
index 4ac3ad3cf9..ee15ffa508 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/YCbCrAndRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/YCbCrAndRgbConverter.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="YCbCr"/> input to an instance of <see cref="Rgb"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public Rgb Convert(in YCbCr input)
         {
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Performs the conversion from the <see cref="Rgb"/> input to an instance of <see cref="YCbCr"/> type.
         /// </summary>
         /// <param name="input">The input color instance.</param>
-        /// <returns>The converted result</returns>
+        /// <returns>The converted result.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public YCbCr Convert(in Rgb input)
         {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
index 639d0b2933..c45dea3179 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
@@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// The gamma working space.
     /// </summary>
-    public class GammaWorkingSpace : RgbWorkingSpaceBase
+    public sealed class GammaWorkingSpace : RgbWorkingSpaceBase
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GammaWorkingSpace" /> class.
diff --git a/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs b/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
index b2ee030483..e1386e1a09 100644
--- a/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
+++ b/tests/ImageSharp.Tests/Colorspaces/Companding/CompandingTests.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 using System.Numerics;
 using SixLabors.ImageSharp.ColorSpaces.Companding;
 using Xunit;
@@ -10,9 +9,7 @@ using Xunit;
 namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
 {
     /// <summary>
-    /// Tests various companding algorithms. Numbers are hand calculated from formulas online.
-    /// TODO: Oddly the formula for converting to/from Rec 2020 and 709 from Wikipedia seems to cause the value to 
-    /// fail a round trip. They're large spaces so this is a surprise. More reading required!!
+    /// Tests various companding algorithms. Expanded numbers are hand calculated from formulas online.
     /// </summary>
     public class CompandingTests
     {
@@ -24,7 +21,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
             const float input = .667F;
             float e = Rec2020Companding.Expand(input);
             float c = Rec2020Companding.Compress(e);
-            CompandingIsCorrectImpl(e, c, .4484759F, .3937096F);
+            CompandingIsCorrectImpl(e, c, .4484759F, input);
         }
 
         [Fact]
@@ -33,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
             const float input = .667F;
             float e = Rec709Companding.Expand(input);
             float c = Rec709Companding.Compress(e);
-            CompandingIsCorrectImpl(e, c, .4483577F, .3937451F);
+            CompandingIsCorrectImpl(e, c, .4483577F, input);
         }
 
         [Fact]
@@ -42,7 +39,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
             const float input = .667F;
             float e = SRgbCompanding.Expand(input);
             float c = SRgbCompanding.Compress(e);
-            CompandingIsCorrectImpl(e, c, .40242353F, .667F);
+            CompandingIsCorrectImpl(e, c, .40242353F, input);
         }
 
         [Theory]
@@ -98,7 +95,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
             const float input = .667F;
             float e = GammaCompanding.Expand(input, gamma);
             float c = GammaCompanding.Compress(e, gamma);
-            CompandingIsCorrectImpl(e, c, .41027668F, .667F);
+            CompandingIsCorrectImpl(e, c, .41027668F, input);
         }
 
         [Fact]
@@ -107,7 +104,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Companding
             const float input = .667F;
             float e = LCompanding.Expand(input);
             float c = LCompanding.Compress(e);
-            CompandingIsCorrectImpl(e, c, .36236193F, .58908917F);
+            CompandingIsCorrectImpl(e, c, .36236193F, input);
         }
 
         private static void CompandingIsCorrectImpl(float e, float c, float expanded, float compressed)

From 48a1a1f107c4975439f63852bfc90aa9a5e1dece Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sun, 14 Apr 2019 08:01:38 +1000
Subject: [PATCH 055/223] Use more accuracy when calculating variance. Fix #866
 (#874)

* Use more accuracy when calculating variance. Fix #866

* Add unit tests

* Add test that fails with old image.

* Make IFrameQuantizer IDisposable

* Update GifEncoderCore.cs
---
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  |  24 +-
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |   7 +-
 .../FrameQuantizerBase{TPixel}.cs             |   5 +
 .../Quantization/IFrameQuantizer{TPixel}.cs   |   3 +-
 .../Quantization/QuantizeProcessor.cs         |   2 +-
 .../Quantization/WuFrameQuantizer{TPixel}.cs  | 416 ++++++++++--------
 .../Quantization/WuQuantizerTests.cs          | 168 +++++++
 tests/ImageSharp.Tests/TestImages.cs          |   1 +
 tests/Images/Input/Png/low-variance.png       |   3 +
 9 files changed, 425 insertions(+), 204 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
 create mode 100644 tests/Images/Input/Png/low-variance.png

diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index e5a5463ebb..12a515cca7 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -95,8 +95,11 @@ namespace SixLabors.ImageSharp.Formats.Gif
             bool useGlobalTable = this.colorTableMode == GifColorTableMode.Global;
 
             // Quantize the image returning a palette.
-            QuantizedFrame<TPixel> quantized =
-                this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration()).QuantizeFrame(image.Frames.RootFrame);
+            QuantizedFrame<TPixel> quantized = null;
+            using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration()))
+            {
+                quantized = frameQuantizer.QuantizeFrame(image.Frames.RootFrame);
+            }
 
             // Get the number of bits.
             this.bitDepth = ImageMaths.GetBitsNeededForColorDepth(quantized.Palette.Length).Clamp(1, 8);
@@ -133,7 +136,6 @@ namespace SixLabors.ImageSharp.Formats.Gif
 
             // Clean up.
             quantized?.Dispose();
-            quantized = null;
 
             // TODO: Write extension etc
             stream.WriteByte(GifConstants.EndIntroducer);
@@ -158,7 +160,8 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 }
                 else
                 {
-                    using (QuantizedFrame<TPixel> paletteQuantized = palleteQuantizer.CreateFrameQuantizer(image.GetConfiguration()).QuantizeFrame(frame))
+                    using (IFrameQuantizer<TPixel> palleteFrameQuantizer = palleteQuantizer.CreateFrameQuantizer(image.GetConfiguration()))
+                    using (QuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
                     {
                         this.WriteImageData(paletteQuantized, stream);
                     }
@@ -181,14 +184,17 @@ namespace SixLabors.ImageSharp.Formats.Gif
                     if (previousFrame != null && previousMeta.ColorTableLength != frameMetadata.ColorTableLength
                                               && frameMetadata.ColorTableLength > 0)
                     {
-                        quantized = this.quantizer.CreateFrameQuantizer<TPixel>(
-                            image.GetConfiguration(),
-                            frameMetadata.ColorTableLength).QuantizeFrame(frame);
+                        using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration(), frameMetadata.ColorTableLength))
+                        {
+                            quantized = frameQuantizer.QuantizeFrame(frame);
+                        }
                     }
                     else
                     {
-                        quantized = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration())
-                            .QuantizeFrame(frame);
+                        using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration()))
+                        {
+                            quantized = frameQuantizer.QuantizeFrame(frame);
+                        }
                     }
                 }
 
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 9818e6cf17..7415b07532 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -243,8 +243,11 @@ namespace SixLabors.ImageSharp.Formats.Png
                 }
 
                 // Create quantized frame returning the palette and set the bit depth.
-                quantized = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration())
-                    .QuantizeFrame(image.Frames.RootFrame);
+                using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration()))
+                {
+                    quantized = frameQuantizer.QuantizeFrame(image.Frames.RootFrame);
+                }
+
                 byte quantizedBits = (byte)ImageMaths.GetBitsNeededForColorDepth(quantized.Palette.Length).Clamp(1, 8);
                 bits = Math.Max(bits, quantizedBits);
 
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
index a70cfb6601..f23343f6d7 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
@@ -98,6 +98,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             return quantizedFrame;
         }
 
+        /// <inheritdoc/>
+        public virtual void Dispose()
+        {
+        }
+
         /// <summary>
         /// Execute the first pass through the pixels in the image to create the palette.
         /// </summary>
diff --git a/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
index 50fdb5b587..f0b68b3a08 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 
@@ -10,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// Provides methods to allow the execution of the quantization process on an image frame.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public interface IFrameQuantizer<TPixel>
+    public interface IFrameQuantizer<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
index 8da89bf94a..e99f504b42 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <inheritdoc />
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
-            IFrameQuantizer<TPixel> executor = this.Quantizer.CreateFrameQuantizer<TPixel>(configuration);
+            using (IFrameQuantizer<TPixel> executor = this.Quantizer.CreateFrameQuantizer<TPixel>(configuration))
             using (QuantizedFrame<TPixel> quantized = executor.QuantizeFrame(source))
             {
                 int paletteCount = quantized.Palette.Length - 1;
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
index 44df226cfd..1f1513adf1 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
@@ -11,6 +11,8 @@ using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
+// TODO: Isn't an AOS ("array of structures") layout more efficient & more readable than SOA ("structure of arrays") for this particular use case?
+// (T, R, G, B, A, M2) could be grouped together! Investigate a ColorMoment struct.
 namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 {
     /// <summary>
@@ -36,20 +38,17 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     internal sealed class WuFrameQuantizer<TPixel> : FrameQuantizerBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        // TODO: The WuFrameQuantizer<TPixel> code is rising several questions:
-        // - Do we really need to ALWAYS allocate the whole table of size TableLength? (~ 2471625 * sizeof(long) * 5 bytes ) JS. I'm afraid so.
-        // - Isn't an AOS ("array of structures") layout more efficient & more readable than SOA ("structure of arrays") for this particular use case?
-        //   (T, R, G, B, A, M2) could be grouped together!
-        // - It's a frequently used class, we need tests! (So we can optimize safely.) There are tests in the original!!! We should just adopt them!
-        //   https://github.com/JeremyAnsel/JeremyAnsel.ColorQuant/blob/master/JeremyAnsel.ColorQuant/JeremyAnsel.ColorQuant.Tests/WuColorQuantizerTests.cs
+        // The following two variables determine the amount of bits to preserve when calculating the histogram.
+        // Reducing the value of these numbers the granularity of the color maps produced, making it much faster
+        // and using much less memory but potentially less accurate. Current results are very good though!
 
         /// <summary>
-        /// The index bits.
+        /// The index bits. 6 in original code.
         /// </summary>
         private const int IndexBits = 5;
 
         /// <summary>
-        /// The index alpha bits. Keep separate for now to allow easy adjustment.
+        /// The index alpha bits. 3 in original code.
         /// </summary>
         private const int IndexAlphaBits = 5;
 
@@ -64,7 +63,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         private const int IndexAlphaCount = (1 << IndexAlphaBits) + 1;
 
         /// <summary>
-        /// The table length. Now 1185921.
+        /// The table length. Now 1185921. originally 2471625.
         /// </summary>
         private const int TableLength = IndexCount * IndexCount * IndexCount * IndexAlphaCount;
 
@@ -96,7 +95,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Moment of <c>c^2*P(c)</c>.
         /// </summary>
-        private IMemoryOwner<float> m2;
+        private IMemoryOwner<double> m2;
 
         /// <summary>
         /// Color space tag.
@@ -149,28 +148,27 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             Guard.NotNull(image, nameof(image));
             MemoryAllocator memoryAllocator = image.MemoryAllocator;
 
-            try
-            {
-                this.vwt = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
-                this.vmr = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
-                this.vmg = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
-                this.vmb = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
-                this.vma = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
-                this.m2 = memoryAllocator.Allocate<float>(TableLength, AllocationOptions.Clean);
-                this.tag = memoryAllocator.Allocate<byte>(TableLength, AllocationOptions.Clean);
-
-                return base.QuantizeFrame(image);
-            }
-            finally
-            {
-                this.vwt?.Dispose();
-                this.vmr?.Dispose();
-                this.vmg?.Dispose();
-                this.vmb?.Dispose();
-                this.vma?.Dispose();
-                this.m2?.Dispose();
-                this.tag?.Dispose();
-            }
+            this.vwt = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
+            this.vmr = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
+            this.vmg = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
+            this.vmb = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
+            this.vma = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
+            this.m2 = memoryAllocator.Allocate<double>(TableLength, AllocationOptions.Clean);
+            this.tag = memoryAllocator.Allocate<byte>(TableLength, AllocationOptions.Clean);
+
+            return base.QuantizeFrame(image);
+        }
+
+        /// <inheritdoc/>
+        public override void Dispose()
+        {
+            this.vwt?.Dispose();
+            this.vmr?.Dispose();
+            this.vmg?.Dispose();
+            this.vmb?.Dispose();
+            this.vma?.Dispose();
+            this.m2?.Dispose();
+            this.tag?.Dispose();
         }
 
         internal TPixel[] AotGetPalette() => this.GetPalette();
@@ -275,9 +273,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private static int GetPaletteIndex(int r, int g, int b, int a)
         {
-            return (r << ((IndexBits * 2) + IndexAlphaBits)) + (r << (IndexBits + IndexAlphaBits + 1))
-                   + (g << (IndexBits + IndexAlphaBits)) + (r << (IndexBits * 2)) + (r << (IndexBits + 1))
-                   + (g << IndexBits) + ((r + g + b) << IndexAlphaBits) + r + g + b + a;
+            return (r << ((IndexBits * 2) + IndexAlphaBits))
+                + (r << (IndexBits + IndexAlphaBits + 1))
+                + (g << (IndexBits + IndexAlphaBits))
+                + (r << (IndexBits * 2))
+                + (r << (IndexBits + 1))
+                + (g << IndexBits)
+                + ((r + g + b) << IndexAlphaBits)
+                + r + g + b + a;
         }
 
         /// <summary>
@@ -288,26 +291,26 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <returns>The result.</returns>
         private static float Volume(ref Box cube, Span<long> moment)
         {
-            return moment[GetPaletteIndex(cube.R1, cube.G1, cube.B1, cube.A1)]
-                   - moment[GetPaletteIndex(cube.R1, cube.G1, cube.B1, cube.A0)]
-                   - moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A1)]
-                   + moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A0)]
-                   - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A1)]
-                   + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A0)]
-                   + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A1)]
-                   - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A0)]
-                   - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A1)]
-                   + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A0)]
-                   + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A1)]
-                   - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A0)]
-                   + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A1)]
-                   - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A0)]
-                   - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)]
-                   + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+            return moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, cube.AMax)]
+                 - moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, cube.AMin)]
+                 - moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMax)]
+                 + moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMin)]
+                 - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMax)]
+                 + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMin)]
+                 + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMax)]
+                 - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMin)]
+                 - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMax)]
+                 + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMin)]
+                 + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMax)]
+                 - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMin)]
+                 + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMax)]
+                 - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMin)]
+                 - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMax)]
+                 + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
         }
 
         /// <summary>
-        /// Computes part of Volume(cube, moment) that doesn't depend on r1, g1, or b1 (depending on direction).
+        /// Computes part of Volume(cube, moment) that doesn't depend on RMax, GMax, BMax, or AMax (depending on direction).
         /// </summary>
         /// <param name="cube">The cube.</param>
         /// <param name="direction">The direction.</param>
@@ -319,47 +322,47 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             {
                 // Red
                 case 3:
-                    return -moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+                    return -moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
 
                 // Green
                 case 2:
-                    return -moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+                    return -moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
 
                 // Blue
                 case 1:
-                    return -moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+                    return -moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
 
                 // Alpha
                 case 0:
-                    return -moment[GetPaletteIndex(cube.R1, cube.G1, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+                    return -moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
 
                 default:
                     throw new ArgumentOutOfRangeException(nameof(direction));
@@ -367,7 +370,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <summary>
-        /// Computes remainder of Volume(cube, moment), substituting position for r1, g1, or b1 (depending on direction).
+        /// Computes remainder of Volume(cube, moment), substituting position for RMax, GMax, BMax, or AMax (depending on direction).
         /// </summary>
         /// <param name="cube">The cube.</param>
         /// <param name="direction">The direction.</param>
@@ -380,47 +383,47 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             {
                 // Red
                 case 3:
-                    return moment[GetPaletteIndex(position, cube.G1, cube.B1, cube.A1)]
-                           - moment[GetPaletteIndex(position, cube.G1, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(position, cube.G1, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(position, cube.G1, cube.B0, cube.A0)]
-                           - moment[GetPaletteIndex(position, cube.G0, cube.B1, cube.A1)]
-                           + moment[GetPaletteIndex(position, cube.G0, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(position, cube.G0, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(position, cube.G0, cube.B0, cube.A0)];
+                    return moment[GetPaletteIndex(position, cube.GMax, cube.BMax, cube.AMax)]
+                         - moment[GetPaletteIndex(position, cube.GMax, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(position, cube.GMax, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(position, cube.GMax, cube.BMin, cube.AMin)]
+                         - moment[GetPaletteIndex(position, cube.GMin, cube.BMax, cube.AMax)]
+                         + moment[GetPaletteIndex(position, cube.GMin, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(position, cube.GMin, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(position, cube.GMin, cube.BMin, cube.AMin)];
 
                 // Green
                 case 2:
-                    return moment[GetPaletteIndex(cube.R1, position, cube.B1, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R1, position, cube.B1, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R1, position, cube.B0, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R1, position, cube.B0, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, position, cube.B1, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, position, cube.B1, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, position, cube.B0, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, position, cube.B0, cube.A0)];
+                    return moment[GetPaletteIndex(cube.RMax, position, cube.BMax, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMax, position, cube.BMax, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMax, position, cube.BMin, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMax, position, cube.BMin, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, position, cube.BMax, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, position, cube.BMax, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, position, cube.BMin, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, position, cube.BMin, cube.AMin)];
 
                 // Blue
                 case 1:
-                    return moment[GetPaletteIndex(cube.R1, cube.G1, position, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G1, position, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G0, position, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, position, cube.A0)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G1, position, cube.A1)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, position, cube.A0)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, position, cube.A1)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, position, cube.A0)];
+                    return moment[GetPaletteIndex(cube.RMax, cube.GMax, position, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMax, position, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMin, position, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, position, cube.AMin)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMax, position, cube.AMax)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, position, cube.AMin)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, position, cube.AMax)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, position, cube.AMin)];
 
                 // Alpha
                 case 0:
-                    return moment[GetPaletteIndex(cube.R1, cube.G1, cube.B1, position)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G1, cube.B0, position)]
-                           - moment[GetPaletteIndex(cube.R1, cube.G0, cube.B1, position)]
-                           + moment[GetPaletteIndex(cube.R1, cube.G0, cube.B0, position)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G1, cube.B1, position)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G1, cube.B0, position)]
-                           + moment[GetPaletteIndex(cube.R0, cube.G0, cube.B1, position)]
-                           - moment[GetPaletteIndex(cube.R0, cube.G0, cube.B0, position)];
+                    return moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, position)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, position)]
+                         - moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, position)]
+                         + moment[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, position)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, position)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, position)]
+                         + moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, position)]
+                         - moment[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, position)];
 
                 default:
                     throw new ArgumentOutOfRangeException(nameof(direction));
@@ -440,7 +443,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             Span<long> vmgSpan = this.vmg.GetSpan();
             Span<long> vmbSpan = this.vmb.GetSpan();
             Span<long> vmaSpan = this.vma.GetSpan();
-            Span<float> m2Span = this.m2.GetSpan();
+            Span<double> m2Span = this.m2.GetSpan();
 
             // Build up the 3-D color histogram
             // Loop through each row
@@ -489,34 +492,34 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             Span<long> vmgSpan = this.vmg.GetSpan();
             Span<long> vmbSpan = this.vmb.GetSpan();
             Span<long> vmaSpan = this.vma.GetSpan();
-            Span<float> m2Span = this.m2.GetSpan();
+            Span<double> m2Span = this.m2.GetSpan();
 
             using (IMemoryOwner<long> volume = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
             using (IMemoryOwner<long> volumeR = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
             using (IMemoryOwner<long> volumeG = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
             using (IMemoryOwner<long> volumeB = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
             using (IMemoryOwner<long> volumeA = memoryAllocator.Allocate<long>(IndexCount * IndexAlphaCount))
-            using (IMemoryOwner<float> volume2 = memoryAllocator.Allocate<float>(IndexCount * IndexAlphaCount))
+            using (IMemoryOwner<double> volume2 = memoryAllocator.Allocate<double>(IndexCount * IndexAlphaCount))
             using (IMemoryOwner<long> area = memoryAllocator.Allocate<long>(IndexAlphaCount))
             using (IMemoryOwner<long> areaR = memoryAllocator.Allocate<long>(IndexAlphaCount))
             using (IMemoryOwner<long> areaG = memoryAllocator.Allocate<long>(IndexAlphaCount))
             using (IMemoryOwner<long> areaB = memoryAllocator.Allocate<long>(IndexAlphaCount))
             using (IMemoryOwner<long> areaA = memoryAllocator.Allocate<long>(IndexAlphaCount))
-            using (IMemoryOwner<float> area2 = memoryAllocator.Allocate<float>(IndexAlphaCount))
+            using (IMemoryOwner<double> area2 = memoryAllocator.Allocate<double>(IndexAlphaCount))
             {
                 Span<long> volumeSpan = volume.GetSpan();
                 Span<long> volumeRSpan = volumeR.GetSpan();
                 Span<long> volumeGSpan = volumeG.GetSpan();
                 Span<long> volumeBSpan = volumeB.GetSpan();
                 Span<long> volumeASpan = volumeA.GetSpan();
-                Span<float> volume2Span = volume2.GetSpan();
+                Span<double> volume2Span = volume2.GetSpan();
 
                 Span<long> areaSpan = area.GetSpan();
                 Span<long> areaRSpan = areaR.GetSpan();
                 Span<long> areaGSpan = areaG.GetSpan();
                 Span<long> areaBSpan = areaB.GetSpan();
                 Span<long> areaASpan = areaA.GetSpan();
-                Span<float> area2Span = area2.GetSpan();
+                Span<double> area2Span = area2.GetSpan();
 
                 for (int r = 1; r < IndexCount; r++)
                 {
@@ -543,7 +546,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                             long lineG = 0;
                             long lineB = 0;
                             long lineA = 0;
-                            float line2 = 0;
+                            double line2 = 0;
 
                             for (int a = 1; a < IndexAlphaCount; a++)
                             {
@@ -592,35 +595,35 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <param name="cube">The cube.</param>
         /// <returns>The <see cref="float"/>.</returns>
-        private float Variance(ref Box cube)
+        private double Variance(ref Box cube)
         {
             float dr = Volume(ref cube, this.vmr.GetSpan());
             float dg = Volume(ref cube, this.vmg.GetSpan());
             float db = Volume(ref cube, this.vmb.GetSpan());
             float da = Volume(ref cube, this.vma.GetSpan());
 
-            Span<float> m2Span = this.m2.GetSpan();
-
-            float xx =
-                m2Span[GetPaletteIndex(cube.R1, cube.G1, cube.B1, cube.A1)]
-                - m2Span[GetPaletteIndex(cube.R1, cube.G1, cube.B1, cube.A0)]
-                - m2Span[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A1)]
-                + m2Span[GetPaletteIndex(cube.R1, cube.G1, cube.B0, cube.A0)]
-                - m2Span[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A1)]
-                + m2Span[GetPaletteIndex(cube.R1, cube.G0, cube.B1, cube.A0)]
-                + m2Span[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A1)]
-                - m2Span[GetPaletteIndex(cube.R1, cube.G0, cube.B0, cube.A0)]
-                - m2Span[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A1)]
-                + m2Span[GetPaletteIndex(cube.R0, cube.G1, cube.B1, cube.A0)]
-                + m2Span[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A1)]
-                - m2Span[GetPaletteIndex(cube.R0, cube.G1, cube.B0, cube.A0)]
-                + m2Span[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A1)]
-                - m2Span[GetPaletteIndex(cube.R0, cube.G0, cube.B1, cube.A0)]
-                - m2Span[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)]
-                + m2Span[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)];
+            Span<double> m2Span = this.m2.GetSpan();
+
+            double moment =
+                  m2Span[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, cube.AMax)]
+                - m2Span[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMax, cube.AMin)]
+                - m2Span[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMax)]
+                + m2Span[GetPaletteIndex(cube.RMax, cube.GMax, cube.BMin, cube.AMin)]
+                - m2Span[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMax)]
+                + m2Span[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMax, cube.AMin)]
+                + m2Span[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMax)]
+                - m2Span[GetPaletteIndex(cube.RMax, cube.GMin, cube.BMin, cube.AMin)]
+                - m2Span[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMax)]
+                + m2Span[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMax, cube.AMin)]
+                + m2Span[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMax)]
+                - m2Span[GetPaletteIndex(cube.RMin, cube.GMax, cube.BMin, cube.AMin)]
+                + m2Span[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMax)]
+                - m2Span[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMax, cube.AMin)]
+                - m2Span[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMax)]
+                + m2Span[GetPaletteIndex(cube.RMin, cube.GMin, cube.BMin, cube.AMin)];
 
             var vector = new Vector4(dr, dg, db, da);
-            return xx - (Vector4.Dot(vector, vector) / Volume(ref cube, this.vwt.GetSpan()));
+            return moment - (Vector4.Dot(vector, vector) / Volume(ref cube, this.vwt.GetSpan()));
         }
 
         /// <summary>
@@ -714,10 +717,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             float wholeA = Volume(ref set1, this.vma.GetSpan());
             float wholeW = Volume(ref set1, this.vwt.GetSpan());
 
-            float maxr = this.Maximize(ref set1, 3, set1.R0 + 1, set1.R1, out int cutr, wholeR, wholeG, wholeB, wholeA, wholeW);
-            float maxg = this.Maximize(ref set1, 2, set1.G0 + 1, set1.G1, out int cutg, wholeR, wholeG, wholeB, wholeA, wholeW);
-            float maxb = this.Maximize(ref set1, 1, set1.B0 + 1, set1.B1, out int cutb, wholeR, wholeG, wholeB, wholeA, wholeW);
-            float maxa = this.Maximize(ref set1, 0, set1.A0 + 1, set1.A1, out int cuta, wholeR, wholeG, wholeB, wholeA, wholeW);
+            float maxr = this.Maximize(ref set1, 3, set1.RMin + 1, set1.RMax, out int cutr, wholeR, wholeG, wholeB, wholeA, wholeW);
+            float maxg = this.Maximize(ref set1, 2, set1.GMin + 1, set1.GMax, out int cutg, wholeR, wholeG, wholeB, wholeA, wholeW);
+            float maxb = this.Maximize(ref set1, 1, set1.BMin + 1, set1.BMax, out int cutb, wholeR, wholeG, wholeB, wholeA, wholeW);
+            float maxa = this.Maximize(ref set1, 0, set1.AMin + 1, set1.AMax, out int cuta, wholeR, wholeG, wholeB, wholeA, wholeW);
 
             int dir;
 
@@ -743,48 +746,48 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                 dir = 0;
             }
 
-            set2.R1 = set1.R1;
-            set2.G1 = set1.G1;
-            set2.B1 = set1.B1;
-            set2.A1 = set1.A1;
+            set2.RMax = set1.RMax;
+            set2.GMax = set1.GMax;
+            set2.BMax = set1.BMax;
+            set2.AMax = set1.AMax;
 
             switch (dir)
             {
                 // Red
                 case 3:
-                    set2.R0 = set1.R1 = cutr;
-                    set2.G0 = set1.G0;
-                    set2.B0 = set1.B0;
-                    set2.A0 = set1.A0;
+                    set2.RMin = set1.RMax = cutr;
+                    set2.GMin = set1.GMin;
+                    set2.BMin = set1.BMin;
+                    set2.AMin = set1.AMin;
                     break;
 
                 // Green
                 case 2:
-                    set2.G0 = set1.G1 = cutg;
-                    set2.R0 = set1.R0;
-                    set2.B0 = set1.B0;
-                    set2.A0 = set1.A0;
+                    set2.GMin = set1.GMax = cutg;
+                    set2.RMin = set1.RMin;
+                    set2.BMin = set1.BMin;
+                    set2.AMin = set1.AMin;
                     break;
 
                 // Blue
                 case 1:
-                    set2.B0 = set1.B1 = cutb;
-                    set2.R0 = set1.R0;
-                    set2.G0 = set1.G0;
-                    set2.A0 = set1.A0;
+                    set2.BMin = set1.BMax = cutb;
+                    set2.RMin = set1.RMin;
+                    set2.GMin = set1.GMin;
+                    set2.AMin = set1.AMin;
                     break;
 
                 // Alpha
                 case 0:
-                    set2.A0 = set1.A1 = cuta;
-                    set2.R0 = set1.R0;
-                    set2.G0 = set1.G0;
-                    set2.B0 = set1.B0;
+                    set2.AMin = set1.AMax = cuta;
+                    set2.RMin = set1.RMin;
+                    set2.GMin = set1.GMin;
+                    set2.BMin = set1.BMin;
                     break;
             }
 
-            set1.Volume = (set1.R1 - set1.R0) * (set1.G1 - set1.G0) * (set1.B1 - set1.B0) * (set1.A1 - set1.A0);
-            set2.Volume = (set2.R1 - set2.R0) * (set2.G1 - set2.G0) * (set2.B1 - set2.B0) * (set2.A1 - set2.A0);
+            set1.Volume = (set1.RMax - set1.RMin) * (set1.GMax - set1.GMin) * (set1.BMax - set1.BMin) * (set1.AMax - set1.AMin);
+            set2.Volume = (set2.RMax - set2.RMin) * (set2.GMax - set2.GMin) * (set2.BMax - set2.BMin) * (set2.AMax - set2.AMin);
 
             return true;
         }
@@ -798,13 +801,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         {
             Span<byte> tagSpan = this.tag.GetSpan();
 
-            for (int r = cube.R0 + 1; r <= cube.R1; r++)
+            for (int r = cube.RMin + 1; r <= cube.RMax; r++)
             {
-                for (int g = cube.G0 + 1; g <= cube.G1; g++)
+                for (int g = cube.GMin + 1; g <= cube.GMax; g++)
                 {
-                    for (int b = cube.B0 + 1; b <= cube.B1; b++)
+                    for (int b = cube.BMin + 1; b <= cube.BMax; b++)
                     {
-                        for (int a = cube.A0 + 1; a <= cube.A1; a++)
+                        for (int a = cube.AMin + 1; a <= cube.AMax; a++)
                         {
                             tagSpan[GetPaletteIndex(r, g, b, a)] = label;
                         }
@@ -819,12 +822,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         private void BuildCube()
         {
             this.colorCube = new Box[this.colors];
-            float[] vv = new float[this.colors];
+            double[] vv = new double[this.colors];
 
             ref Box cube = ref this.colorCube[0];
-            cube.R0 = cube.G0 = cube.B0 = cube.A0 = 0;
-            cube.R1 = cube.G1 = cube.B1 = IndexCount - 1;
-            cube.A1 = IndexAlphaCount - 1;
+            cube.RMin = cube.GMin = cube.BMin = cube.AMin = 0;
+            cube.RMax = cube.GMax = cube.BMax = IndexCount - 1;
+            cube.AMax = IndexAlphaCount - 1;
 
             int next = 0;
 
@@ -839,13 +842,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                 }
                 else
                 {
-                    vv[next] = 0F;
+                    vv[next] = 0D;
                     i--;
                 }
 
                 next = 0;
 
-                float temp = vv[0];
+                double temp = vv[0];
                 for (int k = 1; k <= i; k++)
                 {
                     if (vv[k] > temp)
@@ -855,7 +858,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                     }
                 }
 
-                if (temp <= 0F)
+                if (temp <= 0D)
                 {
                     this.colors = i + 1;
                     break;
@@ -897,52 +900,83 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Represents a box color cube.
         /// </summary>
-        private struct Box
+        private struct Box : IEquatable<Box>
         {
             /// <summary>
             /// Gets or sets the min red value, exclusive.
             /// </summary>
-            public int R0;
+            public int RMin;
 
             /// <summary>
             /// Gets or sets the max red value, inclusive.
             /// </summary>
-            public int R1;
+            public int RMax;
 
             /// <summary>
             /// Gets or sets the min green value, exclusive.
             /// </summary>
-            public int G0;
+            public int GMin;
 
             /// <summary>
             /// Gets or sets the max green value, inclusive.
             /// </summary>
-            public int G1;
+            public int GMax;
 
             /// <summary>
             /// Gets or sets the min blue value, exclusive.
             /// </summary>
-            public int B0;
+            public int BMin;
 
             /// <summary>
             /// Gets or sets the max blue value, inclusive.
             /// </summary>
-            public int B1;
+            public int BMax;
 
             /// <summary>
             /// Gets or sets the min alpha value, exclusive.
             /// </summary>
-            public int A0;
+            public int AMin;
 
             /// <summary>
             /// Gets or sets the max alpha value, inclusive.
             /// </summary>
-            public int A1;
+            public int AMax;
 
             /// <summary>
             /// Gets or sets the volume.
             /// </summary>
             public int Volume;
+
+            /// <inheritdoc/>
+            public override bool Equals(object obj) => obj is Box box && this.Equals(box);
+
+            /// <inheritdoc/>
+            public bool Equals(Box other) =>
+                this.RMin == other.RMin
+                && this.RMax == other.RMax
+                && this.GMin == other.GMin
+                && this.GMax == other.GMax
+                && this.BMin == other.BMin
+                && this.BMax == other.BMax
+                && this.AMin == other.AMin
+                && this.AMax == other.AMax
+                && this.Volume == other.Volume;
+
+            /// <inheritdoc/>
+            public override int GetHashCode()
+            {
+                HashCode hash = default;
+                hash.Add(this.RMin);
+                hash.Add(this.RMax);
+                hash.Add(this.GMin);
+                hash.Add(this.GMax);
+                hash.Add(this.BMin);
+                hash.Add(this.BMax);
+                hash.Add(this.AMin);
+                hash.Add(this.AMax);
+                hash.Add(this.Volume);
+                return hash.ToHashCode();
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
new file mode 100644
index 0000000000..3eacd74ea1
--- /dev/null
+++ b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
@@ -0,0 +1,168 @@
+using System;
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Quantization
+{
+    public class WuQuantizerTests
+    {
+        [Fact]
+        public void SinglePixelOpaque()
+        {
+            Configuration config = Configuration.Default;
+            var quantizer = new WuQuantizer(false);
+
+            using (var image = new Image<Rgba32>(config, 1, 1, Rgba32.Black))
+            using (QuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
+            {
+                Assert.Equal(1, result.Palette.Length);
+                Assert.Equal(1, result.GetPixelSpan().Length);
+
+                Assert.Equal(Rgba32.Black, result.Palette[0]);
+                Assert.Equal(0, result.GetPixelSpan()[0]);
+            }
+        }
+
+        [Fact]
+        public void SinglePixelTransparent()
+        {
+            Configuration config = Configuration.Default;
+            var quantizer = new WuQuantizer(false);
+
+            using (var image = new Image<Rgba32>(config, 1, 1, default(Rgba32)))
+            using (QuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
+            {
+                Assert.Equal(1, result.Palette.Length);
+                Assert.Equal(1, result.GetPixelSpan().Length);
+
+                Assert.Equal(default, result.Palette[0]);
+                Assert.Equal(0, result.GetPixelSpan()[0]);
+            }
+        }
+
+        [Fact]
+        public void GrayScale() => TestScale(c => new Rgba32(c, c, c, 128));
+
+        [Fact]
+        public void RedScale() => TestScale(c => new Rgba32(c, 0, 0, 128));
+
+        [Fact]
+        public void GreenScale() => TestScale(c => new Rgba32(0, c, 0, 128));
+
+        [Fact]
+        public void BlueScale() => TestScale(c => new Rgba32(0, 0, c, 128));
+
+        [Fact]
+        public void AlphaScale() => TestScale(c => new Rgba32(0, 0, 0, c));
+
+        [Fact]
+        public void Palette256()
+        {
+            using (var image = new Image<Rgba32>(1, 256))
+            {
+                for (int i = 0; i < 256; i++)
+                {
+                    byte r = (byte)((i % 4) * 85);
+                    byte g = (byte)(((i / 4) % 4) * 85);
+                    byte b = (byte)(((i / 16) % 4) * 85);
+                    byte a = (byte)((i / 64) * 85);
+
+                    image[0, i] = new Rgba32(r, g, b, a);
+                }
+
+                Configuration config = Configuration.Default;
+                var quantizer = new WuQuantizer(false);
+                using (IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(config))
+                using (QuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                {
+                    Assert.Equal(256, result.Palette.Length);
+                    Assert.Equal(256, result.GetPixelSpan().Length);
+
+                    var actualImage = new Image<Rgba32>(1, 256);
+
+                    int paletteCount = result.Palette.Length - 1;
+                    for (int y = 0; y < actualImage.Height; y++)
+                    {
+                        Span<Rgba32> row = actualImage.GetPixelRowSpan(y);
+                        ReadOnlySpan<byte> quantizedPixelSpan = result.GetPixelSpan();
+                        int yy = y * actualImage.Width;
+
+                        for (int x = 0; x < actualImage.Width; x++)
+                        {
+                            int i = x + yy;
+                            row[x] = result.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                        }
+                    }
+
+                    Assert.True(image.GetPixelSpan().SequenceEqual(actualImage.GetPixelSpan()));
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(TestImages.Png.LowColorVariance, PixelTypes.Rgba32)]
+        public void LowVariance<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            // See https://github.com/SixLabors/ImageSharp/issues/866
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                Configuration config = Configuration.Default;
+                var quantizer = new WuQuantizer(false);
+                using (IFrameQuantizer<TPixel> frameQuantizer = quantizer.CreateFrameQuantizer<TPixel>(config))
+                using (QuantizedFrame<TPixel> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                {
+                    Assert.Equal(48, result.Palette.Length);
+                }
+            }
+        }
+
+        private static void TestScale(Func<byte, Rgba32> pixelBuilder)
+        {
+            using (var image = new Image<Rgba32>(1, 256))
+            using (var expectedImage = new Image<Rgba32>(1, 256))
+            using (var actualImage = new Image<Rgba32>(1, 256))
+            {
+                for (int i = 0; i < 256; i++)
+                {
+                    byte c = (byte)i;
+                    image[0, i] = pixelBuilder.Invoke(c);
+                }
+
+                for (int i = 0; i < 256; i++)
+                {
+                    byte c = (byte)((i & ~7) + 4);
+                    expectedImage[0, i] = pixelBuilder.Invoke(c);
+                }
+
+                Configuration config = Configuration.Default;
+                var quantizer = new WuQuantizer(false);
+
+                using (IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(config))
+                using (QuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                {
+                    Assert.Equal(4 * 8, result.Palette.Length);
+                    Assert.Equal(256, result.GetPixelSpan().Length);
+
+                    int paletteCount = result.Palette.Length - 1;
+                    for (int y = 0; y < actualImage.Height; y++)
+                    {
+                        Span<Rgba32> row = actualImage.GetPixelRowSpan(y);
+                        ReadOnlySpan<byte> quantizedPixelSpan = result.GetPixelSpan();
+                        int yy = y * actualImage.Width;
+
+                        for (int x = 0; x < actualImage.Width; x++)
+                        {
+                            int i = x + yy;
+                            row[x] = result.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                        }
+                    }
+                }
+
+                Assert.True(expectedImage.GetPixelSpan().SequenceEqual(actualImage.GetPixelSpan()));
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 9099696247..1efb9e35fd 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -53,6 +53,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Gray2BitTrans = "Png/gray-2-tRNS.png";
             public const string Gray4BitTrans = "Png/gray-4-tRNS.png";
             public const string Gray8BitTrans = "Png/gray-8-tRNS.png";
+            public const string LowColorVariance = "Png/low-variance.png";
 
             // Filtered test images from http://www.schaik.com/pngsuite/pngsuite_fil_png.html
             public const string Filter0 = "Png/filter0.png";
diff --git a/tests/Images/Input/Png/low-variance.png b/tests/Images/Input/Png/low-variance.png
new file mode 100644
index 0000000000..7d8b1043eb
--- /dev/null
+++ b/tests/Images/Input/Png/low-variance.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:70c224ef674b546db0ec3281008bb6e2b879e95b0be5625f0af8aff980eee583
+size 7844

From d645b5599e43ea1f5106ec506b1d88b90f4ed55a Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Sat, 13 Apr 2019 21:01:04 -0500
Subject: [PATCH 056/223] Nits - Benchmarks (#884)

* Update metadata names

* Use WithIterationCount

* Format Benchmark documents

* Update copyright assignment to Six Labors & Contributors

* Update deps

* React to Benchmark library update
---
 tests/ImageSharp.Benchmarks/BenchmarkBase.cs  |  9 ++--
 .../ImageSharp.Benchmarks/Codecs/DecodeBmp.cs |  2 +-
 .../Codecs/DecodeFilteredPng.cs               |  4 +-
 .../ImageSharp.Benchmarks/Codecs/DecodePng.cs |  1 -
 .../Codecs/ImageBenchmarkTests.cs             |  4 +-
 .../BlockOperations/Block8x8F_CopyTo2x2.cs    | 40 +++++++++------
 .../Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs   |  8 +--
 .../Codecs/Jpeg/EncodeJpeg.cs                 | 18 +++----
 .../Codecs/MultiImageBenchmarkBase.cs         | 18 +++----
 .../Color/ColorEquality.cs                    | 12 ++---
 .../Color/ColorspaceCieXyzToCieLabConvert.cs  | 14 ++---
 .../ColorspaceCieXyzToHunterLabConvert.cs     | 15 +++---
 .../Color/ColorspaceCieXyzToLmsConvert.cs     | 15 +++---
 .../Color/ColorspaceCieXyzToRgbConvert.cs     | 14 ++---
 .../ImageSharp.Benchmarks/Color/RgbToYCbCr.cs | 32 ++++++------
 .../Color/RgbWorkingSpaceAdapt.cs             | 15 +++---
 tests/ImageSharp.Benchmarks/Config.cs         | 17 +++----
 .../Drawing/DrawBeziers.cs                    | 38 +++++++-------
 .../Drawing/DrawLines.cs                      | 51 +++++++++----------
 .../Drawing/DrawPolygon.cs                    | 35 ++++++-------
 .../ImageSharp.Benchmarks/Drawing/DrawText.cs | 26 ++++------
 .../Drawing/DrawTextOutline.cs                | 32 +++++-------
 .../Drawing/FillPolygon.cs                    | 49 +++++++++---------
 .../Drawing/FillRectangle.cs                  | 24 ++++-----
 .../Drawing/FillWithPattern.cs                | 28 +++++-----
 .../ImageSharp.Benchmarks/General/Array2D.cs  | 14 +++--
 .../General/ArrayCopy.cs                      | 19 ++++---
 .../General/ArrayReverse.cs                   | 14 +++--
 .../General/BasicMath/ClampInt32IntoByte.cs   |  4 +-
 .../PixelConversion_ConvertToRgba32.cs        |  5 +-
 .../PixelConversion_ConvertToVector4.cs       |  2 -
 .../General/Vector4Constants.cs               | 10 ++--
 .../General/Vectorization/BitwiseOrUint32.cs  |  8 +--
 .../General/Vectorization/DivFloat.cs         | 12 ++---
 .../General/Vectorization/DivUInt32.cs        | 14 ++---
 .../General/Vectorization/Divide.cs           |  9 ++--
 .../General/Vectorization/MulFloat.cs         |  8 +--
 .../General/Vectorization/MulUInt32.cs        | 10 ++--
 .../General/Vectorization/Multiply.cs         |  6 +--
 .../Vectorization/ReinterpretUInt32AsFloat.cs | 12 ++---
 .../Vectorization/SIMDBenchmarkBase.cs        | 11 ++--
 .../ImageSharp.Benchmarks.csproj              |  6 +--
 tests/ImageSharp.Benchmarks/Program.cs        | 13 ++---
 tests/ImageSharp.Benchmarks/Samplers/Crop.cs  | 42 +++++++--------
 .../Samplers/DetectEdges.cs                   |  6 +--
 tests/ImageSharp.Benchmarks/Samplers/Glow.cs  | 13 +++--
 .../ImageSharp.Benchmarks/Samplers/Resize.cs  |  1 -
 .../ImageSharp.Benchmarks/Samplers/Rotate.cs  |  5 +-
 tests/ImageSharp.Benchmarks/Samplers/Skew.cs  |  5 +-
 49 files changed, 352 insertions(+), 418 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/BenchmarkBase.cs b/tests/ImageSharp.Benchmarks/BenchmarkBase.cs
index 6db03a4486..87ed8fa423 100644
--- a/tests/ImageSharp.Benchmarks/BenchmarkBase.cs
+++ b/tests/ImageSharp.Benchmarks/BenchmarkBase.cs
@@ -1,7 +1,8 @@
-namespace SixLabors.ImageSharp.Benchmarks
-{
-    using SixLabors.ImageSharp.Formats;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
+namespace SixLabors.ImageSharp.Benchmarks
+{
     /// <summary>
     /// The image benchmark base class.
     /// </summary>
@@ -15,4 +16,4 @@
             // Add Image Formats
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Codecs/DecodeBmp.cs b/tests/ImageSharp.Benchmarks/Codecs/DecodeBmp.cs
index 30799aabf9..1ab5ed3099 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/DecodeBmp.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/DecodeBmp.cs
@@ -54,4 +54,4 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Codecs/DecodeFilteredPng.cs b/tests/ImageSharp.Benchmarks/Codecs/DecodeFilteredPng.cs
index ff378c75c3..cc946e05ad 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/DecodeFilteredPng.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/DecodeFilteredPng.cs
@@ -1,7 +1,5 @@
-// <copyright file="DecodePng.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.IO;
 using System.Runtime.CompilerServices;
diff --git a/tests/ImageSharp.Benchmarks/Codecs/DecodePng.cs b/tests/ImageSharp.Benchmarks/Codecs/DecodePng.cs
index 39f09b6b6f..a19d8fa91e 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/DecodePng.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/DecodePng.cs
@@ -11,7 +11,6 @@ using SDImage = System.Drawing.Image;
 
 namespace SixLabors.ImageSharp.Benchmarks.Codecs
 {
-
     [Config(typeof(Config.ShortClr))]
     public class DecodePng : BenchmarkBase
     {
diff --git a/tests/ImageSharp.Benchmarks/Codecs/ImageBenchmarkTests.cs b/tests/ImageSharp.Benchmarks/Codecs/ImageBenchmarkTests.cs
index ee77a2b6b4..7c3da90db6 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/ImageBenchmarkTests.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/ImageBenchmarkTests.cs
@@ -1,7 +1,5 @@
-// <copyright file="ImageBenchmarkTests.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 // This file contains small, cheap and "unit test" benchmarks to test MultiImageBenchmarkBase.
 // Need this because there are no real test cases for the common benchmark utility stuff.
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/BlockOperations/Block8x8F_CopyTo2x2.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/BlockOperations/Block8x8F_CopyTo2x2.cs
index 65176af5bb..3d9b54dffa 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/BlockOperations/Block8x8F_CopyTo2x2.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/BlockOperations/Block8x8F_CopyTo2x2.cs
@@ -364,22 +364,30 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg.BlockOperations
             ref Vector4 dTopLeft = ref Unsafe.As<Vector2, Vector4>(ref Unsafe.Add(ref destBase, offset));
             ref Vector4 dBottomLeft = ref Unsafe.As<Vector2, Vector4>(ref Unsafe.Add(ref destBase, offset + destStride));
 
-            var xyLeft = new Vector4(sLeft.X);
-            xyLeft.Z = sLeft.Y;
-            xyLeft.W = sLeft.Y;
-
-            var zwLeft = new Vector4(sLeft.Z);
-            zwLeft.Z = sLeft.W;
-            zwLeft.W = sLeft.W;
-            
-            var xyRight = new Vector4(sRight.X);
-            xyRight.Z = sRight.Y;
-            xyRight.W = sRight.Y;
-
-            var zwRight = new Vector4(sRight.Z);
-            zwRight.Z = sRight.W;
-            zwRight.W = sRight.W;
-            
+            var xyLeft = new Vector4(sLeft.X)
+            {
+                Z = sLeft.Y,
+                W = sLeft.Y
+            };
+
+            var zwLeft = new Vector4(sLeft.Z)
+            {
+                Z = sLeft.W,
+                W = sLeft.W
+            };
+
+            var xyRight = new Vector4(sRight.X)
+            {
+                Z = sRight.Y,
+                W = sRight.Y
+            };
+
+            var zwRight = new Vector4(sRight.Z)
+            {
+                Z = sRight.W,
+                W = sRight.W
+            };
+
             dTopLeft = xyLeft;
             Unsafe.Add(ref dTopLeft, 1) = zwLeft;
             Unsafe.Add(ref dTopLeft, 2) = xyRight;
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
index fe112042ef..8247ba42b5 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
@@ -5,6 +5,7 @@ using System.Drawing;
 using System.IO;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Configs;
+using BenchmarkDotNet.Diagnosers;
 using BenchmarkDotNet.Jobs;
 
 using SixLabors.ImageSharp.Formats.Jpeg;
@@ -26,8 +27,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         {
             public Config()
             {
-                // Uncomment if you want to use any of the diagnoser
-                this.Add(new BenchmarkDotNet.Diagnosers.MemoryDiagnoser());
+                this.Add(MemoryDiagnoser.Default);
             }
 
             public class ShortClr : Benchmarks.Config
@@ -35,8 +35,8 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
                 public ShortClr()
                 {
                     this.Add(
-                        //Job.Clr.WithLaunchCount(1).WithWarmupCount(2).WithTargetCount(3),
-                        Job.Core.WithLaunchCount(1).WithWarmupCount(2).WithTargetCount(3)
+                        //Job.Clr.WithLaunchCount(1).WithWarmupCount(2).WithIterationCount(3),
+                        Job.Core.WithLaunchCount(1).WithWarmupCount(2).WithIterationCount(3)
                     );
                 }
             }
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/EncodeJpeg.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/EncodeJpeg.cs
index d934a1d6de..c617d25c07 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/EncodeJpeg.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/EncodeJpeg.cs
@@ -1,18 +1,16 @@
-// <copyright file="EncodeJpeg.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using SixLabors.ImageSharp.PixelFormats;
 
+using BenchmarkDotNet.Attributes;
+
 namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
 {
     using System.Drawing;
     using System.Drawing.Imaging;
     using System.IO;
 
-    using BenchmarkDotNet.Attributes;
-
     using CoreImage = SixLabors.ImageSharp.Image;
 
     public class EncodeJpeg : BenchmarkBase
@@ -45,19 +43,19 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         [Benchmark(Baseline = true, Description = "System.Drawing Jpeg")]
         public void JpegSystemDrawing()
         {
-            using (var memoryStream = new MemoryStream())
+            using (var stream = new MemoryStream())
             {
-                this.bmpDrawing.Save(memoryStream, ImageFormat.Jpeg);
+                this.bmpDrawing.Save(stream, ImageFormat.Jpeg);
             }
         }
 
         [Benchmark(Description = "ImageSharp Jpeg")]
         public void JpegCore()
         {
-            using (var memoryStream = new MemoryStream())
+            using (var stream = new MemoryStream())
             {
-                this.bmpCore.SaveAsJpeg(memoryStream);
+                this.bmpCore.SaveAsJpeg(stream);
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs b/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
index 446c038596..75bbf21a33 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
@@ -1,7 +1,5 @@
-// <copyright file="MultiImageBenchmarkBase.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Jobs;
@@ -18,7 +16,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
     using System.Numerics;
 
     using BenchmarkDotNet.Attributes;
-
+    using BenchmarkDotNet.Diagnosers;
     using SixLabors.ImageSharp.Tests;
 
     using CoreImage = ImageSharp.Image;
@@ -30,7 +28,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
             public Config()
             {
                 // Uncomment if you want to use any of the diagnoser
-                this.Add(new BenchmarkDotNet.Diagnosers.MemoryDiagnoser());
+                this.Add(MemoryDiagnoser.Default);
             }
 
             public class ShortClr : Benchmarks.Config
@@ -38,7 +36,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
                 public ShortClr()
                 {
                     this.Add(
-                        Job.Core.WithLaunchCount(1).WithWarmupCount(1).WithTargetCount(2)
+                        Job.Core.WithLaunchCount(1).WithWarmupCount(1).WithIterationCount(2)
                     );
                 }
             }
@@ -47,7 +45,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
         protected Dictionary<string, byte[]> FileNamesToBytes = new Dictionary<string, byte[]>();
 
         protected Dictionary<string, Image<Rgba32>> FileNamesToImageSharpImages = new Dictionary<string, Image<Rgba32>>();
-        protected Dictionary<string, System.Drawing.Bitmap> FileNamesToSystemDrawingImages = new Dictionary<string, System.Drawing.Bitmap>();
+        protected Dictionary<string, Bitmap> FileNamesToSystemDrawingImages = new Dictionary<string, System.Drawing.Bitmap>();
 
         /// <summary>
         /// The values of this enum separate input files into categories
@@ -152,7 +150,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
         {
             foreach (KeyValuePair<string, byte[]> kv in this.FileNames2Bytes)
             {
-                using (MemoryStream memoryStream = new MemoryStream(kv.Value))
+                using (var memoryStream = new MemoryStream(kv.Value))
                 {
                     try
                     {
@@ -179,7 +177,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
                     byte[] bytes = kv.Value;
                     string fn = kv.Key;
 
-                    using (MemoryStream ms1 = new MemoryStream(bytes))
+                    using (var ms1 = new MemoryStream(bytes))
                     {
                         this.FileNamesToImageSharpImages[fn] = CoreImage.Load<Rgba32>(ms1);
 
@@ -223,7 +221,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
 
             protected void ForEachImageSharpImage(Func<Image<Rgba32>, MemoryStream, object> operation)
             {
-                using (MemoryStream workStream = new MemoryStream())
+                using (var workStream = new MemoryStream())
                 {
 
                     this.ForEachImageSharpImage(
diff --git a/tests/ImageSharp.Benchmarks/Color/ColorEquality.cs b/tests/ImageSharp.Benchmarks/Color/ColorEquality.cs
index 02017cbb7d..602e1137f0 100644
--- a/tests/ImageSharp.Benchmarks/Color/ColorEquality.cs
+++ b/tests/ImageSharp.Benchmarks/Color/ColorEquality.cs
@@ -1,14 +1,12 @@
-// <copyright file="ColorEquality.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
-namespace SixLabors.ImageSharp.Benchmarks
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.PixelFormats;
 
+namespace SixLabors.ImageSharp.Benchmarks
+{
     using SystemColor = System.Drawing.Color;
 
     public class ColorEquality
diff --git a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToCieLabConvert.cs b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToCieLabConvert.cs
index cc3472e222..855f5b9b40 100644
--- a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToCieLabConvert.cs
+++ b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToCieLabConvert.cs
@@ -1,13 +1,13 @@
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using Colourful;
-    using Colourful.Conversion;
+using Colourful;
+using Colourful.Conversion;
 
-    using SixLabors.ImageSharp.ColorSpaces;
-    using SixLabors.ImageSharp.ColorSpaces.Conversion;
+using SixLabors.ImageSharp.ColorSpaces;
+using SixLabors.ImageSharp.ColorSpaces.Conversion;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
+{
     public class ColorspaceCieXyzToCieLabConvert
     {
         private static readonly CieXyz CieXyz = new CieXyz(0.95047F, 1, 1.08883F);
diff --git a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToHunterLabConvert.cs b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToHunterLabConvert.cs
index d109995184..07870b3a85 100644
--- a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToHunterLabConvert.cs
+++ b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToHunterLabConvert.cs
@@ -1,13 +1,13 @@
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using Colourful;
-    using Colourful.Conversion;
+using Colourful;
+using Colourful.Conversion;
 
-    using SixLabors.ImageSharp.ColorSpaces;
-    using SixLabors.ImageSharp.ColorSpaces.Conversion;
+using SixLabors.ImageSharp.ColorSpaces;
+using SixLabors.ImageSharp.ColorSpaces.Conversion;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
+{
     public class ColorspaceCieXyzToHunterLabConvert
     {
         private static readonly CieXyz CieXyz = new CieXyz(0.95047F, 1, 1.08883F);
@@ -18,7 +18,6 @@
 
         private static readonly ColourfulConverter ColourfulConverter = new ColourfulConverter();
 
-
         [Benchmark(Baseline = true, Description = "Colourful Convert")]
         public double ColourfulConvert()
         {
diff --git a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToLmsConvert.cs b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToLmsConvert.cs
index da7b9c3dd3..4d9ba89286 100644
--- a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToLmsConvert.cs
+++ b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToLmsConvert.cs
@@ -1,13 +1,13 @@
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using Colourful;
-    using Colourful.Conversion;
+using Colourful;
+using Colourful.Conversion;
 
-    using SixLabors.ImageSharp.ColorSpaces;
-    using SixLabors.ImageSharp.ColorSpaces.Conversion;
+using SixLabors.ImageSharp.ColorSpaces;
+using SixLabors.ImageSharp.ColorSpaces.Conversion;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
+{
     public class ColorspaceCieXyzToLmsConvert
     {
         private static readonly CieXyz CieXyz = new CieXyz(0.95047F, 1, 1.08883F);
@@ -18,7 +18,6 @@
 
         private static readonly ColourfulConverter ColourfulConverter = new ColourfulConverter();
 
-
         [Benchmark(Baseline = true, Description = "Colourful Convert")]
         public double ColourfulConvert()
         {
diff --git a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToRgbConvert.cs b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToRgbConvert.cs
index 2a5754ab0e..f20ffdcabc 100644
--- a/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToRgbConvert.cs
+++ b/tests/ImageSharp.Benchmarks/Color/ColorspaceCieXyzToRgbConvert.cs
@@ -1,13 +1,13 @@
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using Colourful;
-    using Colourful.Conversion;
+using Colourful;
+using Colourful.Conversion;
 
-    using SixLabors.ImageSharp.ColorSpaces;
-    using SixLabors.ImageSharp.ColorSpaces.Conversion;
+using SixLabors.ImageSharp.ColorSpaces;
 
+using SixLabors.ImageSharp.ColorSpaces.Conversion;
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
+{
     public class ColorspaceCieXyzToRgbConvert
     {
         private static readonly CieXyz CieXyz = new CieXyz(0.95047F, 1, 1.08883F);
diff --git a/tests/ImageSharp.Benchmarks/Color/RgbToYCbCr.cs b/tests/ImageSharp.Benchmarks/Color/RgbToYCbCr.cs
index 07ae17d754..b4e5ab3802 100644
--- a/tests/ImageSharp.Benchmarks/Color/RgbToYCbCr.cs
+++ b/tests/ImageSharp.Benchmarks/Color/RgbToYCbCr.cs
@@ -136,7 +136,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             OnStackInputCache.Byte input = OnStackInputCache.Byte.Create(this.inputSourceRGB);
 
             // On-stack output:
-            Result result = default(Result);
+            Result result = default;
             float* yPtr = (float*)&result.Y;
             float* cbPtr = (float*)&result.Cb;
             float* crPtr = (float*)&result.Cr;
@@ -162,7 +162,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             OnStackInputCache.Byte input = OnStackInputCache.Byte.Create(this.inputSourceRGB);
 
             // On-stack output:
-            Result result = default(Result);
+            Result result = default;
             float* yPtr = (float*)&result.Y;
             float* cbPtr = (float*)&result.Cb;
             float* crPtr = (float*)&result.Cr;
@@ -194,15 +194,15 @@ namespace SixLabors.ImageSharp.Benchmarks
             // Copy the input to the stack:
 
             // On-stack output:
-            Result result = default(Result);
+            Result result = default;
             float* yPtr = (float*)&result.Y;
             float* cbPtr = (float*)&result.Cb;
             float* crPtr = (float*)&result.Cr;
             // end of code-bloat block :)
 
-            Vector<int> yCoeffs = new Vector<int>(ScaledCoeffs.Y);
-            Vector<int> cbCoeffs = new Vector<int>(ScaledCoeffs.Cb);
-            Vector<int> crCoeffs = new Vector<int>(ScaledCoeffs.Cr);
+            var yCoeffs = new Vector<int>(ScaledCoeffs.Y);
+            var cbCoeffs = new Vector<int>(ScaledCoeffs.Cb);
+            var crCoeffs = new Vector<int>(ScaledCoeffs.Cr);
 
             for (int i = 0; i < this.inputSourceRGB.Length; i++)
             {
@@ -240,23 +240,23 @@ namespace SixLabors.ImageSharp.Benchmarks
             // Copy the input to the stack:
 
             // On-stack output:
-            Result result = default(Result);
+            Result result = default;
             float* yPtr = (float*)&result.Y;
             float* cbPtr = (float*)&result.Cb;
             float* crPtr = (float*)&result.Cr;
             // end of code-bloat block :)
 
-            Vector<int> yCoeffs = new Vector<int>(ScaledCoeffs.Y);
-            Vector<int> cbCoeffs = new Vector<int>(ScaledCoeffs.Cb);
-            Vector<int> crCoeffs = new Vector<int>(ScaledCoeffs.Cr);
+            var yCoeffs = new Vector<int>(ScaledCoeffs.Y);
+            var cbCoeffs = new Vector<int>(ScaledCoeffs.Cb);
+            var crCoeffs = new Vector<int>(ScaledCoeffs.Cr);
 
-            Vector<int> leftY = new Vector<int>(ScaledCoeffs.SelectLeft.Y);
-            Vector<int> leftCb = new Vector<int>(ScaledCoeffs.SelectLeft.Cb);
-            Vector<int> leftCr = new Vector<int>(ScaledCoeffs.SelectLeft.Cr);
+            var leftY = new Vector<int>(ScaledCoeffs.SelectLeft.Y);
+            var leftCb = new Vector<int>(ScaledCoeffs.SelectLeft.Cb);
+            var leftCr = new Vector<int>(ScaledCoeffs.SelectLeft.Cr);
 
-            Vector<int> rightY = new Vector<int>(ScaledCoeffs.SelectRight.Y);
-            Vector<int> rightCb = new Vector<int>(ScaledCoeffs.SelectRight.Cb);
-            Vector<int> rightCr = new Vector<int>(ScaledCoeffs.SelectRight.Cr);
+            var rightY = new Vector<int>(ScaledCoeffs.SelectRight.Y);
+            var rightCb = new Vector<int>(ScaledCoeffs.SelectRight.Cb);
+            var rightCr = new Vector<int>(ScaledCoeffs.SelectRight.Cr);
 
             for (int i = 0; i < this.inputSourceRGB.Length; i++)
             {
diff --git a/tests/ImageSharp.Benchmarks/Color/RgbWorkingSpaceAdapt.cs b/tests/ImageSharp.Benchmarks/Color/RgbWorkingSpaceAdapt.cs
index 92008f6e20..060a28550e 100644
--- a/tests/ImageSharp.Benchmarks/Color/RgbWorkingSpaceAdapt.cs
+++ b/tests/ImageSharp.Benchmarks/Color/RgbWorkingSpaceAdapt.cs
@@ -1,13 +1,13 @@
-namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
-{
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using Colourful;
-    using Colourful.Conversion;
+using Colourful;
+using Colourful.Conversion;
 
-    using SixLabors.ImageSharp.ColorSpaces;
-    using SixLabors.ImageSharp.ColorSpaces.Conversion;
+using SixLabors.ImageSharp.ColorSpaces;
+using SixLabors.ImageSharp.ColorSpaces.Conversion;
 
+namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces
+{
     public class RgbWorkingSpaceAdapt
     {
         private static readonly Rgb Rgb = new Rgb(0.206162F, 0.260277F, 0.746717F, RgbWorkingSpaces.WideGamutRgb);
@@ -18,7 +18,6 @@
 
         private static readonly ColourfulConverter ColourfulConverter = new ColourfulConverter { TargetRGBWorkingSpace = RGBWorkingSpaces.sRGB };
 
-
         [Benchmark(Baseline = true, Description = "Colourful Adapt")]
         public RGBColor ColourfulConvert()
         {
diff --git a/tests/ImageSharp.Benchmarks/Config.cs b/tests/ImageSharp.Benchmarks/Config.cs
index b467579425..0543cbc50d 100644
--- a/tests/ImageSharp.Benchmarks/Config.cs
+++ b/tests/ImageSharp.Benchmarks/Config.cs
@@ -1,20 +1,17 @@
-// <copyright file="Config.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using BenchmarkDotNet.Configs;
+using BenchmarkDotNet.Diagnosers;
+using BenchmarkDotNet.Jobs;
 
 namespace SixLabors.ImageSharp.Benchmarks
 {
-    using BenchmarkDotNet.Jobs;
-
     public class Config : ManualConfig
     {
         public Config()
         {
-            // Uncomment if you want to use any of the diagnoser
-            this.Add(new BenchmarkDotNet.Diagnosers.MemoryDiagnoser());
+            this.Add(MemoryDiagnoser.Default);
         }
 
         public class ShortClr : Config
@@ -22,9 +19,9 @@ namespace SixLabors.ImageSharp.Benchmarks
             public ShortClr()
             {
                 this.Add(
-                    Job.Clr.WithLaunchCount(1).WithWarmupCount(3).WithTargetCount(3),
-                    Job.Core.WithLaunchCount(1).WithWarmupCount(3).WithTargetCount(3)
-                        );
+                    Job.Clr.WithLaunchCount(1).WithWarmupCount(3).WithIterationCount(3),
+                    Job.Core.WithLaunchCount(1).WithWarmupCount(3).WithIterationCount(3)
+                );
             }
         }
     }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
index 34dd9d4dc8..bc9c1c96d2 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
@@ -1,7 +1,5 @@
-// <copyright file="DrawBeziers.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -19,27 +17,25 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Baseline = true, Description = "System.Drawing Draw Beziers")]
         public void DrawPathSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (Graphics graphics = Graphics.FromImage(destination))
+                using (var pen = new Pen(Color.HotPink, 10))
                 {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
-                    {
-                        graphics.DrawBeziers(pen, new[] {
-                                                                new PointF(10, 500),
-                                                                new PointF(30, 10),
-                                                                new PointF(240, 30),
-                                                                new PointF(300, 500)
-                                                            });
-                    }
+                    graphics.DrawBeziers(pen, new[] {
+                        new PointF(10, 500),
+                        new PointF(30, 10),
+                        new PointF(240, 30),
+                        new PointF(300, 500)
+                    });
                 }
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    destination.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
+                    destination.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
                 }
             }
         }
@@ -47,7 +43,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Draw Beziers")]
         public void DrawLinesCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.DrawBeziers(
                     Rgba32.HotPink,
@@ -59,9 +55,9 @@ namespace SixLabors.ImageSharp.Benchmarks
                         new Vector2(300, 500)
                     }));
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    image.SaveAsBmp(ms);
+                    image.SaveAsBmp(stream);
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
index 091f367622..4265525e5b 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
@@ -1,44 +1,41 @@
-// <copyright file="DrawLines.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
-namespace SixLabors.ImageSharp.Benchmarks
-{
-    using System.Drawing;
-    using System.Drawing.Drawing2D;
-    using System.IO;
-    using System.Numerics;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.IO;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.ImageSharp.PixelFormats;
-    using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
 
+namespace SixLabors.ImageSharp.Benchmarks
+{
     public class DrawLines : BenchmarkBase
     {
         [Benchmark(Baseline = true, Description = "System.Drawing Draw Lines")]
         public void DrawPathSystemDrawing()
         {
             using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-                using (var graphics = Graphics.FromImage(destination))
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+
+                using (var pen = new Pen(Color.HotPink, 10))
                 {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
-                    {
-                        graphics.DrawLines(pen, new[] {
-                                                              new PointF(10, 10),
-                                                              new PointF(550, 50),
-                                                              new PointF(200, 400)
-                                                          });
-                    }
+                    graphics.DrawLines(pen, new[] {
+                        new PointF(10, 10),
+                        new PointF(550, 50),
+                        new PointF(200, 400)
+                    });
                 }
 
-                using (var ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    destination.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
+                    destination.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
                 }
             }
         }
@@ -57,9 +54,9 @@ namespace SixLabors.ImageSharp.Benchmarks
                         new Vector2(200, 400)
                     }));
 
-                using (var ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    image.SaveAsBmp(ms);
+                    image.SaveAsBmp(stream);
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
index ab8a7134e7..4172b3c38f 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
@@ -1,7 +1,5 @@
-// <copyright file="Crop.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -19,26 +17,23 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Baseline = true, Description = "System.Drawing Draw Polygon")]
         public void DrawPolygonSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-
-                using (Graphics graphics = Graphics.FromImage(destination))
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                using (var pen = new Pen(Color.HotPink, 10))
                 {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
-                    {
-                        graphics.DrawPolygon(pen, new[] {
-                                                                new PointF(10, 10),
-                                                                new PointF(550, 50),
-                                                                new PointF(200, 400)
-                                                            });
-                    }
+                    graphics.DrawPolygon(pen, new[] {
+                        new PointF(10, 10),
+                        new PointF(550, 50),
+                        new PointF(200, 400)
+                    });
                 }
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    destination.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
+                    destination.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
                 }
             }
         }
@@ -46,7 +41,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Draw Polygon")]
         public void DrawPolygonCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.DrawPolygon(
                     Rgba32.HotPink,
@@ -57,7 +52,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                         new Vector2(200, 400)
                     }));
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var ms = new MemoryStream())
                 {
                     image.SaveAsBmp(ms);
                 }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
index 60c58dadc9..8c840d8c31 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
@@ -1,7 +1,5 @@
-// <copyright file="Crop.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -14,11 +12,9 @@ using SixLabors.ImageSharp.Processing.Processors.Text;
 
 namespace SixLabors.ImageSharp.Benchmarks
 {
-
     [MemoryDiagnoser]
     public class DrawText : BenchmarkBase
     {
-
         [Params(10, 100)]
         public int TextIterations { get; set; }
         public string TextPhrase { get; set; } = "Hello World";
@@ -28,26 +24,22 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Baseline = true, Description = "System.Drawing Draw Text")]
         public void DrawTextSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-
-                using (Graphics graphics = Graphics.FromImage(destination))
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                using (var font = new Font("Arial", 12, GraphicsUnit.Point))
                 {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var font = new Font("Arial", 12, GraphicsUnit.Point))
-                    {
-                        graphics.DrawString(TextToRender, font, System.Drawing.Brushes.HotPink, new RectangleF(10, 10, 780, 780));
-                    }
+                    graphics.DrawString(TextToRender, font, System.Drawing.Brushes.HotPink, new RectangleF(10, 10, 780, 780));
                 }
             }
         }
 
-
         [Benchmark(Description = "ImageSharp Draw Text - Cached Glyphs")]
         public void DrawTextCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
                 image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor<Rgba32>(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10))));
@@ -57,7 +49,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Draw Text - Nieve")]
         public void DrawTextCoreOld()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
                 image.Mutate(x => DrawTextOldVersion(x, new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10)));
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
index 2d6505a91f..b99c47960b 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
@@ -1,7 +1,5 @@
-// <copyright file="Crop.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -13,34 +11,28 @@ using SixLabors.ImageSharp.Processing.Processors.Text;
 
 namespace SixLabors.ImageSharp.Benchmarks
 {
-
     [MemoryDiagnoser]
     public class DrawTextOutline : BenchmarkBase
     {
-
         [Params(10, 100)]
         public int TextIterations { get; set; }
         public string TextPhrase { get; set; } = "Hello World";
         public string TextToRender => string.Join(" ", Enumerable.Repeat(TextPhrase, TextIterations));
 
-
         [Benchmark(Baseline = true, Description = "System.Drawing Draw Text Outline")]
         public void DrawTextSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-
-                using (Graphics graphics = Graphics.FromImage(destination))
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                using (var pen = new Pen(Color.HotPink, 10))
+                using (var font = new Font("Arial", 12, GraphicsUnit.Point))
+                using (var gp = new GraphicsPath())
                 {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
-                    using (var font = new Font("Arial", 12, GraphicsUnit.Point))
-                    using (var gp = new GraphicsPath())
-                    {
-                        gp.AddString(TextToRender, font.FontFamily, (int)font.Style, font.Size, new RectangleF(10, 10, 780, 780), new StringFormat());
-                        graphics.DrawPath(pen, gp);
-                    }
+                    gp.AddString(TextToRender, font.FontFamily, (int)font.Style, font.Size, new RectangleF(10, 10, 780, 780), new StringFormat());
+                    graphics.DrawPath(pen, gp);
                 }
             }
         }
@@ -48,7 +40,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Draw Text Outline - Cached Glyphs")]
         public void DrawTextCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
                 image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor<Rgba32>(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, null, Processing.Pens.Solid(Rgba32.HotPink, 10), new SixLabors.Primitives.PointF(10, 10))));
@@ -58,7 +50,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Draw Text Outline - Nieve")]
         public void DrawTextCoreOld()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
                 image.Mutate(x => DrawTextOldVersion(x, new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, null, Processing.Pens.Solid(Rgba32.HotPink, 10), new SixLabors.Primitives.PointF(10, 10)));
diff --git a/tests/ImageSharp.Benchmarks/Drawing/FillPolygon.cs b/tests/ImageSharp.Benchmarks/Drawing/FillPolygon.cs
index 8aadb85bf3..396cc18d10 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/FillPolygon.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/FillPolygon.cs
@@ -1,7 +1,5 @@
-// <copyright file="FillPolygon.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -21,31 +19,30 @@ namespace SixLabors.ImageSharp.Benchmarks
 
         public FillPolygon()
         {
-            this.shape = new Polygon(new LinearLineSegment(new Vector2(10, 10),
-                        new Vector2(550, 50),
-                        new Vector2(200, 400)));
+            this.shape = new Polygon(new LinearLineSegment(
+                new Vector2(10, 10),
+                new Vector2(550, 50),
+                new Vector2(200, 400)));
         }
 
         [Benchmark(Baseline = true, Description = "System.Drawing Fill Polygon")]
         public void DrawSolidPolygonSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+
+            using (var graphics = Graphics.FromImage(destination))
             {
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                graphics.FillPolygon(System.Drawing.Brushes.HotPink,
+                new[] {
+                    new Point(10, 10),
+                    new Point(550, 50),
+                    new Point(200, 400)
+                });
 
-                using (Graphics graphics = Graphics.FromImage(destination))
-                {
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    graphics.FillPolygon(System.Drawing.Brushes.HotPink,
-                    new[]
-                        {
-                        new Point(10, 10),
-                        new Point(550, 50),
-                        new Point(200, 400)
-                    });
-                }
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    destination.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
+                    destination.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
                 }
             }
         }
@@ -53,7 +50,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Fill Polygon")]
         public void DrawSolidPolygonCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.FillPolygon(
                     Rgba32.HotPink,
@@ -63,9 +60,9 @@ namespace SixLabors.ImageSharp.Benchmarks
                         new Vector2(200, 400)
                     }));
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    image.SaveAsBmp(ms);
+                    image.SaveAsBmp(stream);
                 }
             }
         }
@@ -73,15 +70,15 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Fill Polygon - cached shape")]
         public void DrawSolidPolygonCoreCahced()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.Fill(
                     Rgba32.HotPink,
                     this.shape));
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    image.SaveAsBmp(ms);
+                    image.SaveAsBmp(stream);
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/FillRectangle.cs b/tests/ImageSharp.Benchmarks/Drawing/FillRectangle.cs
index 643e4ac9a1..d45b791aea 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/FillRectangle.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/FillRectangle.cs
@@ -1,7 +1,5 @@
-// <copyright file="Crop.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -15,22 +13,18 @@ using CoreSize = SixLabors.Primitives.Size;
 
 namespace SixLabors.ImageSharp.Benchmarks
 {
-
-
     public class FillRectangle : BenchmarkBase
     {
         [Benchmark(Baseline = true, Description = "System.Drawing Fill Rectangle")]
         public Size FillRectangleSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-
-                using (Graphics graphics = Graphics.FromImage(destination))
-                {
-                    graphics.InterpolationMode = InterpolationMode.Default;
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    graphics.FillRectangle(System.Drawing.Brushes.HotPink, new Rectangle(10, 10, 190, 140));
-                }
+                graphics.InterpolationMode = InterpolationMode.Default;
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                graphics.FillRectangle(System.Drawing.Brushes.HotPink, new Rectangle(10, 10, 190, 140));
+                
                 return destination.Size;
             }
         }
@@ -38,7 +32,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Fill Rectangle")]
         public CoreSize FillRactangleCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.Fill(Rgba32.HotPink, new CoreRectangle(10, 10, 190, 140)));
 
@@ -49,7 +43,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Fill Rectangle - As Polygon")]
         public CoreSize FillPolygonCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.FillPolygon(
                     Rgba32.HotPink,
diff --git a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
index 3723619882..3c9cfd7e34 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
@@ -1,7 +1,5 @@
-// <copyright file="FillWithPattern.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System.Drawing;
 using System.Drawing.Drawing2D;
@@ -21,19 +19,19 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Baseline = true, Description = "System.Drawing Fill with Pattern")]
         public void DrawPatternPolygonSystemDrawing()
         {
-            using (Bitmap destination = new Bitmap(800, 800))
+            using (var destination = new Bitmap(800, 800))
+            using (var graphics = Graphics.FromImage(destination))
             {
-                using (Graphics graphics = Graphics.FromImage(destination))
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+
+                using (var brush = new HatchBrush(HatchStyle.BackwardDiagonal, Color.HotPink))
                 {
-                    graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                    using (var brush = new HatchBrush(HatchStyle.BackwardDiagonal, Color.HotPink))
-                    {
-                        graphics.FillRectangle(brush, new Rectangle(0, 0, 800, 800)); // can't find a way to flood fill with a brush
-                    }
+                    graphics.FillRectangle(brush, new Rectangle(0, 0, 800, 800)); // can't find a way to flood fill with a brush
                 }
-                using (MemoryStream ms = new MemoryStream())
+
+                using (var stream = new MemoryStream())
                 {
-                    destination.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
+                    destination.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
                 }
             }
         }
@@ -41,13 +39,13 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Fill with Pattern")]
         public void DrawPatternPolygon3Core()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.Fill(CoreBrushes.BackwardDiagonal(Rgba32.HotPink)));
 
-                using (MemoryStream ms = new MemoryStream())
+                using (var stream = new MemoryStream())
                 {
-                    image.SaveAsBmp(ms);
+                    image.SaveAsBmp(stream);
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/General/Array2D.cs b/tests/ImageSharp.Benchmarks/General/Array2D.cs
index 60d89847fd..1f8961fcde 100644
--- a/tests/ImageSharp.Benchmarks/General/Array2D.cs
+++ b/tests/ImageSharp.Benchmarks/General/Array2D.cs
@@ -1,16 +1,14 @@
-// <copyright file="Array2D.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
-namespace SixLabors.ImageSharp.Benchmarks.General
-{
-    using System;
+using System;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
-    using SixLabors.ImageSharp.Primitives;
+using SixLabors.ImageSharp.Primitives;
 
+namespace SixLabors.ImageSharp.Benchmarks.General
+{
     /**
      *                                Method | Count |     Mean |    Error |   StdDev | Scaled | ScaledSD |
 -------------------------------------------- |------ |---------:|---------:|---------:|-------:|---------:|
diff --git a/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs b/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
index ac6b3f93c7..41c9ab6c7e 100644
--- a/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
+++ b/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
@@ -1,15 +1,14 @@
-// <copyright file="ArrayCopy.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
-namespace SixLabors.ImageSharp.Benchmarks.General
-{
-    using System;
-    using System.Runtime.CompilerServices;
-    using System.Runtime.InteropServices;
 
-    using BenchmarkDotNet.Attributes;
-    
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using BenchmarkDotNet.Attributes;
+
+namespace SixLabors.ImageSharp.Benchmarks.General
+{    
     [Config(typeof(Config.ShortClr))]
     public class ArrayCopy
     {
diff --git a/tests/ImageSharp.Benchmarks/General/ArrayReverse.cs b/tests/ImageSharp.Benchmarks/General/ArrayReverse.cs
index 45a8519a9c..c49c383eb8 100644
--- a/tests/ImageSharp.Benchmarks/General/ArrayReverse.cs
+++ b/tests/ImageSharp.Benchmarks/General/ArrayReverse.cs
@@ -1,14 +1,12 @@
-// <copyright file="ArrayReverse.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
-namespace SixLabors.ImageSharp.Benchmarks.General
-{
-    using System;
+using System;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General
+{
     public class ArrayReverse
     {
         [Params(4, 16, 32)]
@@ -58,4 +56,4 @@ namespace SixLabors.ImageSharp.Benchmarks.General
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/General/BasicMath/ClampInt32IntoByte.cs b/tests/ImageSharp.Benchmarks/General/BasicMath/ClampInt32IntoByte.cs
index 6ce82ba115..a8686fc187 100644
--- a/tests/ImageSharp.Benchmarks/General/BasicMath/ClampInt32IntoByte.cs
+++ b/tests/ImageSharp.Benchmarks/General/BasicMath/ClampInt32IntoByte.cs
@@ -1,7 +1,5 @@
-// <copyright file="Clamp.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System;
 using System.Runtime.CompilerServices;
diff --git a/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToRgba32.cs b/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToRgba32.cs
index d205e1e63e..ea8b34c249 100644
--- a/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToRgba32.cs
+++ b/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToRgba32.cs
@@ -1,7 +1,4 @@
-// ReSharper disable InconsistentNaming
-
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
 
 using BenchmarkDotNet.Attributes;
 
diff --git a/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToVector4.cs b/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToVector4.cs
index 2bc3ee9716..68a16b7919 100644
--- a/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToVector4.cs
+++ b/tests/ImageSharp.Benchmarks/General/PixelConversion/PixelConversion_ConvertToVector4.cs
@@ -3,8 +3,6 @@ using System.Runtime.CompilerServices;
 
 using BenchmarkDotNet.Attributes;
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Benchmarks.General.PixelConversion
 {
     public class PixelConversion_ConvertToVector4
diff --git a/tests/ImageSharp.Benchmarks/General/Vector4Constants.cs b/tests/ImageSharp.Benchmarks/General/Vector4Constants.cs
index ae11806f32..3597207ee4 100644
--- a/tests/ImageSharp.Benchmarks/General/Vector4Constants.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vector4Constants.cs
@@ -1,10 +1,10 @@
-namespace SixLabors.ImageSharp.Benchmarks.General
-{
-    using System;
-    using System.Numerics;
+using System;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General
+{
     /// <summary>
     /// Has it any effect on performance to store SIMD constants as static readonly fields? Is it OK to always inline them?
     /// Spoiler: the difference seems to be statistically insignificant!
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/BitwiseOrUint32.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/BitwiseOrUint32.cs
index d189411b5d..3afb796a7c 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/BitwiseOrUint32.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/BitwiseOrUint32.cs
@@ -1,9 +1,9 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class BitwiseOrUInt32
     {
         private uint[] input;
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/DivFloat.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/DivFloat.cs
index 6378467478..be9534f7d0 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/DivFloat.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/DivFloat.cs
@@ -1,9 +1,9 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class DivFloat
     {
         private float[] input;
@@ -41,11 +41,11 @@ namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
         [Benchmark]
         public void Simd()
         {
-            Vector<float> v = new Vector<float>(this.testValue);
+            var v = new Vector<float>(this.testValue);
 
             for (int i = 0; i < this.input.Length; i += Vector<uint>.Count)
             {
-                Vector<float> a = new Vector<float>(this.input, i);
+                var a = new Vector<float>(this.input, i);
                 a = a / v;
                 a.CopyTo(this.result, i);
             }
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/DivUInt32.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/DivUInt32.cs
index 49ada2f368..bfc8d3de38 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/DivUInt32.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/DivUInt32.cs
@@ -1,9 +1,9 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class DivUInt32
     {
         private uint[] input;
@@ -32,6 +32,7 @@ namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
         public void Standard()
         {
             uint v = this.testValue;
+
             for (int i = 0; i < this.input.Length; i++)
             {
                 this.result[i] = this.input[i] / v;
@@ -41,11 +42,12 @@ namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
         [Benchmark]
         public void Simd()
         {
-            Vector<uint> v = new Vector<uint>(this.testValue);
+            var v = new Vector<uint>(this.testValue);
 
             for (int i = 0; i < this.input.Length; i += Vector<uint>.Count)
             {
-                Vector<uint> a = new Vector<uint>(this.input, i);
+                var a = new Vector<uint>(this.input, i);
+
                 a = a / v;
                 a.CopyTo(this.result, i);
             }
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/Divide.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/Divide.cs
index b384295570..df09aa569a 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/Divide.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/Divide.cs
@@ -1,10 +1,9 @@
-namespace ImageSharp.Benchmarks.General.Vectorization
-{
-    using System;
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace ImageSharp.Benchmarks.General.Vectorization
+{
     public class DivFloat : SIMDBenchmarkBase<float>.Divide
     {
         protected override float GetTestValue() => 42;
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/MulFloat.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/MulFloat.cs
index 8c5f568181..418209cbc3 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/MulFloat.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/MulFloat.cs
@@ -1,9 +1,9 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class MulFloat
     {
         private float[] input;
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/MulUInt32.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/MulUInt32.cs
index 913d4ce3c7..7253dbd6a1 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/MulUInt32.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/MulUInt32.cs
@@ -1,9 +1,9 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
+using System.Numerics;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class MulUInt32
     {
         private uint[] input;
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
         [Benchmark]
         public void Simd()
         {
-            Vector<uint> v = new Vector<uint>(this.testValue);
+            var v = new Vector<uint>(this.testValue);
 
             for (int i = 0; i < this.input.Length; i += Vector<uint>.Count)
             {
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/Multiply.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/Multiply.cs
index d1b70f21b3..7a679c0009 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/Multiply.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/Multiply.cs
@@ -1,8 +1,8 @@
+using System.Numerics;
+using BenchmarkDotNet.Attributes;
+
 namespace ImageSharp.Benchmarks.General.Vectorization
 {
-    using System.Numerics;
-    using BenchmarkDotNet.Attributes;
-
     public class MulUInt32 : SIMDBenchmarkBase<uint>.Multiply
     {
         protected override uint GetTestValue() => 42u;
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/ReinterpretUInt32AsFloat.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/ReinterpretUInt32AsFloat.cs
index f3853a8b1f..67a8a9f39e 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/ReinterpretUInt32AsFloat.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/ReinterpretUInt32AsFloat.cs
@@ -1,10 +1,10 @@
-namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
-    using System.Runtime.InteropServices;
+using System.Numerics;
+using System.Runtime.InteropServices;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
+{
     public class ReinterpretUInt32AsFloat
     {
         private uint[] input;
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Benchmarks.General.Vectorization
         [Benchmark(Baseline = true)]
         public void Standard()
         {
-            UIntFloatUnion u = default(UIntFloatUnion);
+            UIntFloatUnion u = default;
             for (int i = 0; i < this.input.Length; i++)
             {
                 u.i = this.input[i];
diff --git a/tests/ImageSharp.Benchmarks/General/Vectorization/SIMDBenchmarkBase.cs b/tests/ImageSharp.Benchmarks/General/Vectorization/SIMDBenchmarkBase.cs
index 76987dbd21..8fc9d9977a 100644
--- a/tests/ImageSharp.Benchmarks/General/Vectorization/SIMDBenchmarkBase.cs
+++ b/tests/ImageSharp.Benchmarks/General/Vectorization/SIMDBenchmarkBase.cs
@@ -1,10 +1,10 @@
-namespace ImageSharp.Benchmarks.General.Vectorization
-{
-    using System.Numerics;
-    using System.Runtime.CompilerServices;
+using System.Numerics;
+using System.Runtime.CompilerServices;
 
-    using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 
+namespace ImageSharp.Benchmarks.General.Vectorization
+{
     public abstract class SIMDBenchmarkBase<T>
         where T : struct
     {
@@ -19,7 +19,6 @@ namespace ImageSharp.Benchmarks.General.Vectorization
         protected virtual T GetTestValue() => default(T);
 
         protected virtual Vector<T> GetTestVector() => new Vector<T>(this.GetTestValue());
-        
 
         [Params(32)]
         public int InputSize { get; set; }
diff --git a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
index f941203db1..e600af7851 100644
--- a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
+++ b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
@@ -16,10 +16,10 @@
     <Compile Include="..\ImageSharp.Tests\TestUtilities\TestEnvironment.cs" Link="Tests\TestEnvironment.cs" />
   </ItemGroup>
   <ItemGroup>    
-    <PackageReference Include="BenchmarkDotNet" Version="0.11.3" />
-    <PackageReference Include="Colourful" Version="2.0.0" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.11.5" />
+    <PackageReference Include="Colourful" Version="2.0.2" />
     <PackageReference Include="SixLabors.Shapes.Text" Version="1.0.0-beta0007" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.0" />
+    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
diff --git a/tests/ImageSharp.Benchmarks/Program.cs b/tests/ImageSharp.Benchmarks/Program.cs
index 4dd63067ac..5caf238fb2 100644
--- a/tests/ImageSharp.Benchmarks/Program.cs
+++ b/tests/ImageSharp.Benchmarks/Program.cs
@@ -1,15 +1,12 @@
-// <copyright file="Program.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
+
+using System.Reflection;
+
+using BenchmarkDotNet.Running;
 
 namespace SixLabors.ImageSharp.Benchmarks
 {
-    using BenchmarkDotNet.Running;
-    
-    using SixLabors.ImageSharp.Formats;
-    using System.Reflection;
-
     public class Program
     {
         /// <summary>
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Crop.cs b/tests/ImageSharp.Benchmarks/Samplers/Crop.cs
index 240a277cf0..4fe7a365f3 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Crop.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Crop.cs
@@ -1,46 +1,40 @@
-// <copyright file="Crop.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using SixLabors.ImageSharp.PixelFormats;
 
-namespace SixLabors.ImageSharp.Benchmarks
-{
-    using System.Drawing;
-    using System.Drawing.Drawing2D;
+using System.Drawing;
+using System.Drawing.Drawing2D;
 
-    using BenchmarkDotNet.Attributes;
-    using SixLabors.ImageSharp.Processing;
+using BenchmarkDotNet.Attributes;
+using SixLabors.ImageSharp.Processing;
 
-    using CoreSize = SixLabors.Primitives.Size;
+using CoreSize = SixLabors.Primitives.Size;
 
+namespace SixLabors.ImageSharp.Benchmarks
+{
     public class Crop : BenchmarkBase
     {
         [Benchmark(Baseline = true, Description = "System.Drawing Crop")]
         public Size CropSystemDrawing()
         {
-            using (Bitmap source = new Bitmap(800, 800))
+            using (var source = new Bitmap(800, 800))
+            using (var destination = new Bitmap(100, 100))
+            using (var graphics = Graphics.FromImage(destination))
             {
-                using (Bitmap destination = new Bitmap(100, 100))
-                {
-                    using (Graphics graphics = Graphics.FromImage(destination))
-                    {
-                        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
-                        graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
-                        graphics.CompositingQuality = CompositingQuality.HighQuality;
-                        graphics.DrawImage(source, new Rectangle(0, 0, 100, 100), 0, 0, 100, 100, GraphicsUnit.Pixel);
-                    }
-
-                    return destination.Size;
-                }
+                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
+                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
+                graphics.CompositingQuality = CompositingQuality.HighQuality;
+                graphics.DrawImage(source, new Rectangle(0, 0, 100, 100), 0, 0, 100, 100, GraphicsUnit.Pixel);
+         
+                return destination.Size;
             }
         }
 
         [Benchmark(Description = "ImageSharp Crop")]
         public CoreSize CropResizeCore()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 image.Mutate(x => x.Crop(100, 100));
                 return new CoreSize(image.Width, image.Height);
diff --git a/tests/ImageSharp.Benchmarks/Samplers/DetectEdges.cs b/tests/ImageSharp.Benchmarks/Samplers/DetectEdges.cs
index 006d1b6391..b36b28ef33 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/DetectEdges.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/DetectEdges.cs
@@ -1,7 +1,5 @@
-// <copyright file="DetectEdges.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -53,4 +51,4 @@ namespace SixLabors.ImageSharp.Benchmarks
             this.image.Mutate(x => x.DetectEdges(EdgeDetectionOperators.Sobel));
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
index 729971548c..15b82e022d 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Buffers;
 using System.Numerics;
-using System.Threading.Tasks;
 
 using BenchmarkDotNet.Attributes;
 
@@ -35,7 +34,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Glow - Bulk")]
         public CoreSize GlowBulk()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 this.bulk.Apply(image, image.Bounds());
                 return new CoreSize(image.Width, image.Height);
@@ -45,7 +44,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         [Benchmark(Description = "ImageSharp Glow - Parallel")]
         public CoreSize GLowSimple()
         {
-            using (Image<Rgba32> image = new Image<Rgba32>(800, 800))
+            using (var image = new Image<Rgba32>(800, 800))
             {
                 this.parallel.Apply(image, image.Bounds());
                 return new CoreSize(image.Width, image.Height);
@@ -128,7 +127,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                                         int offsetX = x - startX;
                                         float distance = Vector2.Distance(centre, new Vector2(offsetX, offsetY));
                                         Vector4 sourceColor = sourcePixels[offsetX, offsetY].ToVector4();
-                                        TPixel packed = default(TPixel);
+                                        TPixel packed = default;
                                         packed.FromVector4(
                                             PremultipliedLerp(
                                                 sourceColor,
@@ -166,9 +165,9 @@ namespace SixLabors.ImageSharp.Benchmarks
                 // https://en.wikipedia.org/wiki/Alpha_compositing
                 // Vout =  Vs + Vb (1 - Vsa)
                 // Aout = Vsa + Vsb (1 - Vsa)
-                Vector3 inverseW = new Vector3(1 - source.W);
-                Vector3 xyzB = new Vector3(backdrop.X, backdrop.Y, backdrop.Z);
-                Vector3 xyzS = new Vector3(source.X, source.Y, source.Z);
+                var inverseW = new Vector3(1 - source.W);
+                var xyzB = new Vector3(backdrop.X, backdrop.Y, backdrop.Z);
+                var xyzS = new Vector3(source.X, source.Y, source.Z);
 
                 return new Vector4(xyzS + (xyzB * inverseW), source.W + (backdrop.W * (1 - source.W)));
             }
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
index 51f3a5653a..e99163f8b8 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Rotate.cs b/tests/ImageSharp.Benchmarks/Samplers/Rotate.cs
index f898576af0..69ff1549bd 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Rotate.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Rotate.cs
@@ -1,4 +1,7 @@
-using BenchmarkDotNet.Attributes;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using BenchmarkDotNet.Attributes;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.Primitives;
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Skew.cs b/tests/ImageSharp.Benchmarks/Samplers/Skew.cs
index 84819750af..559e49704b 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Skew.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Skew.cs
@@ -1,4 +1,7 @@
-using BenchmarkDotNet.Attributes;
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using BenchmarkDotNet.Attributes;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.Primitives;

From 1a13941836f88be0afc924cde81ddec59fe41de2 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 17:51:30 +0200
Subject: [PATCH 057/223] ResizeWindowOld

---
 .../Transforms/Resize/ResizeProcessor.cs      | 122 +++++++++++++++---
 .../Transforms/ResizeKernelMapTests.cs        |   7 +-
 .../Processors/Transforms/ResizeTests.cs      |  13 +-
 3 files changed, 119 insertions(+), 23 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 8c911cbfab..429b709ee3 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -244,26 +244,24 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
             // First process the columns. Since we are not using multiple threads startY and endY
             // are the upper and lower bounds of the source rectangle.
-            using (Buffer2D<Vector4> firstPassPixelsTransposed = source.MemoryAllocator.Allocate2D<Vector4>(sourceHeight, width))
+            //using (Buffer2D<Vector4> firstPassPixelsTransposed = source.MemoryAllocator.Allocate2D<Vector4>(sourceHeight, width))
+
+            using (var resizeWindow = new ResizeWindowOld(
+                configuration,
+                sourceRectangle,
+                conversionModifiers,
+                this.horizontalKernelMap,
+                this.verticalKernelMap,
+                sourceHeight,
+                width,
+                minX,
+                maxX,
+                startX))
             using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(Math.Max(source.Width, width)))
             {
-                firstPassPixelsTransposed.MemorySource.Clear();
+                Span<Vector4> tempRowSpan = tempBuffer.GetSpan().Slice(sourceX, source.Width - sourceX);
 
-                for (int y = 0; y < sourceRectangle.Bottom; y++)
-                {
-                    Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(sourceX);
-                    Span<Vector4> tempRowSpan = tempBuffer.GetSpan().Slice(sourceX, source.Width - sourceX);
-
-                    PixelOperations<TPixel>.Instance.ToVector4(configuration, sourceRow, tempRowSpan, conversionModifiers);
-
-                    ref Vector4 firstPassBaseRef = ref firstPassPixelsTransposed.Span[y];
-
-                    for (int x = minX; x < maxX; x++)
-                    {
-                        ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - startX);
-                        Unsafe.Add(ref firstPassBaseRef, x * sourceHeight) = kernel.Convolve(tempRowSpan);
-                    }
-                }
+                resizeWindow.Initialize(source.PixelBuffer, tempRowSpan);
 
                 // Now process the rows.
                 Span<Vector4> tempColSpan = tempBuffer.GetSpan().Slice(0, width);
@@ -277,7 +275,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                     for (int x = 0; x < width; x++)
                     {
-                        Span<Vector4> firstPassColumn = firstPassPixelsTransposed.GetRowSpan(x).Slice(sourceY);
+                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x);
 
                         // Destination color components
                         Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
@@ -301,4 +299,92 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.verticalKernelMap = null;
         }
     }
+
+    class ResizeWindowOld : IDisposable
+    {
+        private readonly Buffer2D<Vector4> buffer;
+
+        private readonly Configuration configuration;
+
+        private readonly Rectangle sourceRectangle;
+
+        private readonly PixelConversionModifiers conversionModifiers;
+
+        private readonly ResizeKernelMap horizontalKernelMap;
+
+        private readonly ResizeKernelMap verticalKernelMap;
+
+        private readonly int minX;
+
+        private readonly int maxX;
+
+        private readonly int startX;
+
+        public ResizeWindowOld(
+            Configuration configuration,
+            Rectangle sourceRectangle,
+            PixelConversionModifiers conversionModifiers,
+            ResizeKernelMap horizontalKernelMap,
+            ResizeKernelMap verticalKernelMap,
+            int sourceHeight,
+            int destWidth,
+            int minX,
+            int maxX,
+            int startX)
+        {
+            this.configuration = configuration;
+            this.sourceRectangle = sourceRectangle;
+            this.conversionModifiers = conversionModifiers;
+            this.horizontalKernelMap = horizontalKernelMap;
+            this.verticalKernelMap = verticalKernelMap;
+            this.minX = minX;
+            this.maxX = maxX;
+            this.startX = startX;
+            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(sourceRectangle.Height, destWidth, AllocationOptions.Clean);
+
+            this.Top = sourceRectangle.Top;
+
+            this.Bottom = sourceRectangle.Bottom;
+        }
+
+        public int Top { get; private set; }
+
+        public int Bottom { get; private set; }
+
+        public void Initialize<TPixel>(
+            Buffer2D<TPixel> source,
+            Span<Vector4> tempRowSpan)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            for (int y = this.sourceRectangle.Top; y < this.sourceRectangle.Bottom; y++)
+            {
+                Span<TPixel> sourceRow = source.GetRowSpan(y).Slice(this.sourceRectangle.X);
+
+                PixelOperations<TPixel>.Instance.ToVector4(
+                    this.configuration,
+                    sourceRow,
+                    tempRowSpan,
+                    this.conversionModifiers);
+
+                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - this.sourceRectangle.Y];
+
+                for (int x = this.minX; x < this.maxX; x++)
+                {
+                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
+                    Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
+                }
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Span<Vector4> GetColumnSpan(int x)
+        {
+            return this.buffer.GetRowSpan(x);
+        }
+
+        public void Dispose()
+        {
+            this.buffer.Dispose();
+        }
+    }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
index 5d3790f071..9de8665869 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
@@ -93,7 +93,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             GenerateImageResizeData();
 
 
-        [Theory(Skip = "Only for debugging and development")]
+        [Theory(
+            Skip = "Only for debugging and development"
+            )]
         [MemberData(nameof(KernelMapData))]
         public void PrintNonNormalizedKernelMap(string resamplerName, int srcSize, int destSize)
         {
@@ -130,7 +132,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             var referenceMap = ReferenceKernelMap.Calculate(resampler, destSize, srcSize);
             var kernelMap = ResizeKernelMap.Calculate(resampler, destSize, srcSize, Configuration.Default.MemoryAllocator);
 
+            
+
 #if DEBUG
+            this.Output.WriteLine(kernelMap.Info);
             this.Output.WriteLine($"Expected KernelMap:\n{PrintKernelMap(referenceMap)}\n");
             this.Output.WriteLine($"Actual KernelMap:\n{PrintKernelMap(kernelMap)}\n");
 #endif
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 7f1f5a26a2..5cea8ddaea 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -5,6 +5,7 @@ using System;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
@@ -37,19 +38,23 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
         
         [Theory]
-        [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32)]
-        public void Resize_BasicSmall<TPixel>(TestImageProvider<TPixel> provider)
+        [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)]
+        [WithBasicTestPatternImages(2, 256, PixelTypes.Rgba32, 1, 1, 1, 8)]
+        [WithBasicTestPatternImages(2, 32, PixelTypes.Rgba32, 1, 1, 1, 2)]
+        public void Resize_BasicSmall<TPixel>(TestImageProvider<TPixel> provider, int wN, int wD, int hN, int hD)
             where TPixel : struct, IPixel<TPixel>
         {
             // Basic test case, very helpful for debugging
+            // [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)] means:
             // resizing: (15, 12) -> (10, 6)
             // kernel dimensions: (3, 4)
 
             using (Image<TPixel> image = provider.GetImage())
             {
-                var destSize = new Size(image.Width * 2 / 3, image.Height / 2);
+                var destSize = new Size(image.Width * wN / wD, image.Height * hN / hD);
                 image.Mutate(x => x.Resize(destSize, KnownResamplers.Bicubic, false));
-                image.DebugSave(provider);
+                FormattableString outputInfo = $"({wN}÷{wD},{hN}÷{hD})";
+                image.DebugSave(provider, outputInfo);
             }
         }
 

From fd7c5db66bb0a6d740bd8b0117fa78d85dc78bad Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 18:37:16 +0200
Subject: [PATCH 058/223] ResizeWindow refactor 1

---
 .../Transforms/Resize/ResizeProcessor.cs      | 115 ++----------------
 .../Transforms/Resize/ResizeWindow.cs         |  97 +++++++++++++++
 2 files changed, 106 insertions(+), 106 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 429b709ee3..707be1ec9d 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -195,19 +195,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int sourceX = sourceRectangle.X;
             int sourceY = sourceRectangle.Y;
             int startY = this.TargetRectangle.Y;
-            int endY = this.TargetRectangle.Bottom;
             int startX = this.TargetRectangle.X;
-            int endX = this.TargetRectangle.Right;
 
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(height, endY);
+            var workingRect = Rectangle.Intersect(
+                this.TargetRectangle,
+                new Rectangle(0, 0, width, height));
 
             if (this.Sampler is NearestNeighborResampler)
             {
-                var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
                 // Scaling factors
                 float widthFactor = sourceRectangle.Width / (float)this.TargetRectangle.Width;
                 float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
@@ -224,7 +219,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                 source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
                             Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
 
-                            for (int x = minX; x < maxX; x++)
+                            for (int x = workingRect.Left; x < workingRect.Right; x++)
                             {
                                 // X coordinates of source points
                                 targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
@@ -244,29 +239,25 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
             // First process the columns. Since we are not using multiple threads startY and endY
             // are the upper and lower bounds of the source rectangle.
-            //using (Buffer2D<Vector4> firstPassPixelsTransposed = source.MemoryAllocator.Allocate2D<Vector4>(sourceHeight, width))
-
-            using (var resizeWindow = new ResizeWindowOld(
+            using (var resizeWindow = new ResizeWindow(
                 configuration,
                 sourceRectangle,
                 conversionModifiers,
                 this.horizontalKernelMap,
                 this.verticalKernelMap,
-                sourceHeight,
                 width,
-                minX,
-                maxX,
+                workingRect,
                 startX))
-            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(Math.Max(source.Width, width)))
+            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(Math.Max(sourceRectangle.Width, width)))
             {
-                Span<Vector4> tempRowSpan = tempBuffer.GetSpan().Slice(sourceX, source.Width - sourceX);
+                Span<Vector4> tempRowSpan = tempBuffer.GetSpan();
 
                 resizeWindow.Initialize(source.PixelBuffer, tempRowSpan);
 
                 // Now process the rows.
                 Span<Vector4> tempColSpan = tempBuffer.GetSpan().Slice(0, width);
 
-                for (int y = minY; y < maxY; y++)
+                for (int y = workingRect.Top; y < workingRect.Bottom; y++)
                 {
                     // Ensure offsets are normalized for cropping and padding.
                     ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
@@ -299,92 +290,4 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.verticalKernelMap = null;
         }
     }
-
-    class ResizeWindowOld : IDisposable
-    {
-        private readonly Buffer2D<Vector4> buffer;
-
-        private readonly Configuration configuration;
-
-        private readonly Rectangle sourceRectangle;
-
-        private readonly PixelConversionModifiers conversionModifiers;
-
-        private readonly ResizeKernelMap horizontalKernelMap;
-
-        private readonly ResizeKernelMap verticalKernelMap;
-
-        private readonly int minX;
-
-        private readonly int maxX;
-
-        private readonly int startX;
-
-        public ResizeWindowOld(
-            Configuration configuration,
-            Rectangle sourceRectangle,
-            PixelConversionModifiers conversionModifiers,
-            ResizeKernelMap horizontalKernelMap,
-            ResizeKernelMap verticalKernelMap,
-            int sourceHeight,
-            int destWidth,
-            int minX,
-            int maxX,
-            int startX)
-        {
-            this.configuration = configuration;
-            this.sourceRectangle = sourceRectangle;
-            this.conversionModifiers = conversionModifiers;
-            this.horizontalKernelMap = horizontalKernelMap;
-            this.verticalKernelMap = verticalKernelMap;
-            this.minX = minX;
-            this.maxX = maxX;
-            this.startX = startX;
-            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(sourceRectangle.Height, destWidth, AllocationOptions.Clean);
-
-            this.Top = sourceRectangle.Top;
-
-            this.Bottom = sourceRectangle.Bottom;
-        }
-
-        public int Top { get; private set; }
-
-        public int Bottom { get; private set; }
-
-        public void Initialize<TPixel>(
-            Buffer2D<TPixel> source,
-            Span<Vector4> tempRowSpan)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            for (int y = this.sourceRectangle.Top; y < this.sourceRectangle.Bottom; y++)
-            {
-                Span<TPixel> sourceRow = source.GetRowSpan(y).Slice(this.sourceRectangle.X);
-
-                PixelOperations<TPixel>.Instance.ToVector4(
-                    this.configuration,
-                    sourceRow,
-                    tempRowSpan,
-                    this.conversionModifiers);
-
-                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - this.sourceRectangle.Y];
-
-                for (int x = this.minX; x < this.maxX; x++)
-                {
-                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
-                    Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
-                }
-            }
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Span<Vector4> GetColumnSpan(int x)
-        {
-            return this.buffer.GetRowSpan(x);
-        }
-
-        public void Dispose()
-        {
-            this.buffer.Dispose();
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
new file mode 100644
index 0000000000..130dd93a4b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -0,0 +1,97 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    class ResizeWindow : IDisposable
+    {
+        private readonly Buffer2D<Vector4> buffer;
+
+        private readonly Configuration configuration;
+
+        private readonly Rectangle sourceRectangle;
+
+        private readonly PixelConversionModifiers conversionModifiers;
+
+        private readonly ResizeKernelMap horizontalKernelMap;
+
+        private readonly ResizeKernelMap verticalKernelMap;
+
+        private readonly Rectangle workingRectangle;
+
+        private readonly int startX;
+
+        public ResizeWindow(
+            Configuration configuration,
+            Rectangle sourceRectangle,
+            PixelConversionModifiers conversionModifiers,
+            ResizeKernelMap horizontalKernelMap,
+            ResizeKernelMap verticalKernelMap,
+            int destWidth,
+            Rectangle workingRectangle,
+            int startX)
+        {
+            this.configuration = configuration;
+            this.sourceRectangle = sourceRectangle;
+            this.conversionModifiers = conversionModifiers;
+            this.horizontalKernelMap = horizontalKernelMap;
+            this.verticalKernelMap = verticalKernelMap;
+            this.workingRectangle = workingRectangle;
+            this.startX = startX;
+            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(sourceRectangle.Height, destWidth, AllocationOptions.Clean);
+
+            this.Top = sourceRectangle.Top;
+
+            this.Bottom = sourceRectangle.Bottom;
+        }
+
+        public int Top { get; private set; }
+
+        public int Bottom { get; private set; }
+
+        public void Initialize<TPixel>(
+            Buffer2D<TPixel> source,
+            Span<Vector4> tempRowSpan)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            for (int y = this.sourceRectangle.Top; y < this.sourceRectangle.Bottom; y++)
+            {
+                Span<TPixel> sourceRow = source.GetRowSpan(y).Slice(this.sourceRectangle.X);
+
+                PixelOperations<TPixel>.Instance.ToVector4(
+                    this.configuration,
+                    sourceRow,
+                    tempRowSpan,
+                    this.conversionModifiers);
+
+                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - this.sourceRectangle.Y];
+
+                for (int x = this.workingRectangle.Left; x < this.workingRectangle.Right; x++)
+                {
+                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
+                    Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
+                }
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Span<Vector4> GetColumnSpan(int x)
+        {
+            return this.buffer.GetRowSpan(x);
+        }
+
+        public void Dispose()
+        {
+            this.buffer.Dispose();
+        }
+    }
+}
\ No newline at end of file

From c337c4cb0fef917ef7a25d53135d377ec84542e2 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 21:19:43 +0200
Subject: [PATCH 059/223] ResizeWindow refactor 2

---
 .../Transforms/Resize/ResizeProcessor.cs      | 14 ++--
 .../Transforms/Resize/ResizeWindow.cs         | 67 +++++++++++--------
 2 files changed, 45 insertions(+), 36 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 707be1ec9d..b4b537e200 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -235,27 +235,27 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             PixelConversionModifiers conversionModifiers =
                 PixelConversionModifiers.Premultiply.ApplyCompanding(this.Compand);
 
+            BufferArea<TPixel> sourceArea = source.PixelBuffer.GetArea(sourceRectangle);
+
             // Interpolate the image using the calculated weights.
             // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
             // First process the columns. Since we are not using multiple threads startY and endY
             // are the upper and lower bounds of the source rectangle.
-            using (var resizeWindow = new ResizeWindow(
+            using (var resizeWindow = new ResizeWindow<TPixel>(
                 configuration,
-                sourceRectangle,
+                sourceArea,
                 conversionModifiers,
                 this.horizontalKernelMap,
                 this.verticalKernelMap,
                 width,
                 workingRect,
                 startX))
-            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(Math.Max(sourceRectangle.Width, width)))
+            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(width))
             {
-                Span<Vector4> tempRowSpan = tempBuffer.GetSpan();
-
-                resizeWindow.Initialize(source.PixelBuffer, tempRowSpan);
+                resizeWindow.Initialize();
 
                 // Now process the rows.
-                Span<Vector4> tempColSpan = tempBuffer.GetSpan().Slice(0, width);
+                Span<Vector4> tempColSpan = tempBuffer.GetSpan();
 
                 for (int y = workingRect.Top; y < workingRect.Bottom; y++)
                 {
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
index 130dd93a4b..bd68fdba78 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 
@@ -12,27 +13,32 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    class ResizeWindow : IDisposable
+    class ResizeWindow<TPixel> : IDisposable
+        where TPixel : struct, IPixel<TPixel>
     {
         private readonly Buffer2D<Vector4> buffer;
 
         private readonly Configuration configuration;
 
-        private readonly Rectangle sourceRectangle;
-
         private readonly PixelConversionModifiers conversionModifiers;
 
         private readonly ResizeKernelMap horizontalKernelMap;
 
-        private readonly ResizeKernelMap verticalKernelMap;
+        private readonly BufferArea<TPixel> source;
 
-        private readonly Rectangle workingRectangle;
+        private readonly Rectangle sourceRectangle;
 
         private readonly int startX;
 
+        private readonly IMemoryOwner<Vector4> tempRowBuffer;
+
+        private readonly ResizeKernelMap verticalKernelMap;
+
+        private readonly Rectangle workingRectangle;
+
         public ResizeWindow(
             Configuration configuration,
-            Rectangle sourceRectangle,
+            BufferArea<TPixel> source,
             PixelConversionModifiers conversionModifiers,
             ResizeKernelMap horizontalKernelMap,
             ResizeKernelMap verticalKernelMap,
@@ -41,31 +47,45 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int startX)
         {
             this.configuration = configuration;
-            this.sourceRectangle = sourceRectangle;
+            this.source = source;
+            this.sourceRectangle = source.Rectangle;
             this.conversionModifiers = conversionModifiers;
             this.horizontalKernelMap = horizontalKernelMap;
             this.verticalKernelMap = verticalKernelMap;
             this.workingRectangle = workingRectangle;
             this.startX = startX;
-            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(sourceRectangle.Height, destWidth, AllocationOptions.Clean);
+            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
+                this.sourceRectangle.Height,
+                destWidth,
+                AllocationOptions.Clean);
+            this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
 
-            this.Top = sourceRectangle.Top;
+            this.Top = this.sourceRectangle.Top;
 
-            this.Bottom = sourceRectangle.Bottom;
+            this.Bottom = this.sourceRectangle.Bottom;
         }
 
+        public int Bottom { get; private set; }
+
         public int Top { get; private set; }
 
-        public int Bottom { get; private set; }
+        public void Dispose()
+        {
+            this.buffer.Dispose();
+        }
 
-        public void Initialize<TPixel>(
-            Buffer2D<TPixel> source,
-            Span<Vector4> tempRowSpan)
-            where TPixel : struct, IPixel<TPixel>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Span<Vector4> GetColumnSpan(int x)
         {
-            for (int y = this.sourceRectangle.Top; y < this.sourceRectangle.Bottom; y++)
+            return this.buffer.GetRowSpan(x);
+        }
+
+        public void Initialize()
+        {
+            Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
+            for (int y = 0; y < this.sourceRectangle.Height; y++)
             {
-                Span<TPixel> sourceRow = source.GetRowSpan(y).Slice(this.sourceRectangle.X);
+                Span<TPixel> sourceRow = this.source.GetRowSpan(y);
 
                 PixelOperations<TPixel>.Instance.ToVector4(
                     this.configuration,
@@ -73,7 +93,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     tempRowSpan,
                     this.conversionModifiers);
 
-                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - this.sourceRectangle.Y];
+                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y];
 
                 for (int x = this.workingRectangle.Left; x < this.workingRectangle.Right; x++)
                 {
@@ -82,16 +102,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 }
             }
         }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Span<Vector4> GetColumnSpan(int x)
-        {
-            return this.buffer.GetRowSpan(x);
-        }
-
-        public void Dispose()
-        {
-            this.buffer.Dispose();
-        }
     }
 }
\ No newline at end of file

From 1362f0d0f5d3b51b663b8d15094687e067d2b7da Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 21:59:06 +0200
Subject: [PATCH 060/223] ResizeWindow refactor 3

---
 .../Transforms/Resize/ResizeKernelMap.cs      |  11 +-
 .../Transforms/Resize/ResizeProcessor.cs      |   5 +
 .../Transforms/Resize/ResizeWindow.cs         |  12 +-
 .../Processors/Transforms/ResizeTests.cs      | 433 +++++++++---------
 4 files changed, 245 insertions(+), 216 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernelMap.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernelMap.cs
index 2ab574df2a..9abbb66e3a 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernelMap.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernelMap.cs
@@ -54,11 +54,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.radius = radius;
             this.sourceLength = sourceLength;
             this.DestinationLength = destinationLength;
-            int maxWidth = (radius * 2) + 1;
-            this.data = memoryAllocator.Allocate2D<float>(maxWidth, bufferHeight, AllocationOptions.Clean);
+            this.MaxDiameter = (radius * 2) + 1;
+            this.data = memoryAllocator.Allocate2D<float>(this.MaxDiameter, bufferHeight, AllocationOptions.Clean);
             this.pinHandle = this.data.Memory.Pin();
             this.kernels = new ResizeKernel[destinationLength];
-            this.tempValues = new double[maxWidth];
+            this.tempValues = new double[this.MaxDiameter];
         }
 
         /// <summary>
@@ -66,6 +66,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public int DestinationLength { get; }
 
+        /// <summary>
+        /// Gets the maximum diameter of the kernels.
+        /// </summary>
+        public int MaxDiameter { get; }
+
         /// <summary>
         /// Gets a string of information to help debugging
         /// </summary>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index b4b537e200..38419b5dd6 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -262,6 +262,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     // Ensure offsets are normalized for cropping and padding.
                     ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
+                    if (kernel.Left + kernel.Length > resizeWindow.Bottom)
+                    {
+                        resizeWindow.Slide();
+                    }
+
                     ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
 
                     for (int x = 0; x < width; x++)
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
index bd68fdba78..05015dee20 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -13,7 +13,7 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    class ResizeWindow<TPixel> : IDisposable
+    internal class ResizeWindow<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly Buffer2D<Vector4> buffer;
@@ -36,6 +36,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly Rectangle workingRectangle;
 
+        private readonly int diameter;
+
         public ResizeWindow(
             Configuration configuration,
             BufferArea<TPixel> source,
@@ -54,6 +56,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.verticalKernelMap = verticalKernelMap;
             this.workingRectangle = workingRectangle;
             this.startX = startX;
+
+            this.diameter = verticalKernelMap.MaxDiameter;
+
             this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
                 this.sourceRectangle.Height,
                 destWidth,
@@ -102,5 +107,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 }
             }
         }
+
+        public void Slide()
+        {
+            throw new InvalidOperationException("Shouldn't happen yet!");
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 5cea8ddaea..8c59fff26b 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -5,38 +5,92 @@ using System;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using SixLabors.Primitives;
 
 using Xunit;
+
 // ReSharper disable InconsistentNaming
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
     public class ResizeTests
     {
-        public static readonly string[] CommonTestImages = { TestImages.Png.CalliphoraPartial };
+        private const PixelTypes CommonNonDefaultPixelTypes =
+            PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
 
-        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
+        private const PixelTypes DefaultPixelType = PixelTypes.Rgba32;
 
         public static readonly string[] AllResamplerNames = TestUtils.GetAllResamplerNames();
 
+        public static readonly string[] CommonTestImages = { TestImages.Png.CalliphoraPartial };
+
         public static readonly string[] SmokeTestResamplerNames =
             {
-                nameof(KnownResamplers.NearestNeighbor),
-                nameof(KnownResamplers.Bicubic),
-                nameof(KnownResamplers.Box),
+                nameof(KnownResamplers.NearestNeighbor), nameof(KnownResamplers.Bicubic), nameof(KnownResamplers.Box),
                 nameof(KnownResamplers.Lanczos5),
             };
 
-        private const PixelTypes DefaultPixelType = PixelTypes.Rgba32;
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
+
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void BicubicWindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Bicubic;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void Lanczos3WindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Lanczos3;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-4, 0)]
+        [InlineData(-2, 0)]
+        [InlineData(0, 1)]
+        [InlineData(2, 0)]
+        [InlineData(4, 0)]
+        public static void Lanczos5WindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Lanczos5;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void TriangleWindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Triangle;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
 
-        private const PixelTypes CommonNonDefaultPixelTypes =
-            PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
-        
         [Theory]
         [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)]
         [WithBasicTestPatternImages(2, 256, PixelTypes.Rgba32, 1, 1, 1, 8)]
@@ -54,14 +108,117 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 var destSize = new Size(image.Width * wN / wD, image.Height * hN / hD);
                 image.Mutate(x => x.Resize(destSize, KnownResamplers.Bicubic, false));
                 FormattableString outputInfo = $"({wN}÷{wD},{hN}÷{hD})";
-                image.DebugSave(provider, outputInfo);
+                image.DebugSave(provider, outputInfo, appendPixelTypeToFileName: false);
+                image.CompareToReferenceOutput(provider, outputInfo, appendPixelTypeToFileName: false);
+            }
+        }
+
+        [Theory]
+        [WithTestPatternImages(100, 100, DefaultPixelType)]
+        public void Resize_Compand<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Mutate(x => x.Resize(image.Size() / 2, true));
+
+                image.DebugSave(provider);
+                image.CompareToReferenceOutput(ValidatorComparer, provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(TestImages.Png.Kaboom, DefaultPixelType, false)]
+        [WithFile(TestImages.Png.Kaboom, DefaultPixelType, true)]
+        public void Resize_DoesNotBleedAlphaPixels<TPixel>(TestImageProvider<TPixel> provider, bool compand)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            string details = compand ? "Compand" : "";
+
+            provider.RunValidatingProcessorTest(
+                x => x.Resize(x.GetCurrentSize() / 2, compand),
+                details,
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
+        }
+
+        [Theory]
+        [WithFile(TestImages.Gif.Giphy, DefaultPixelType)]
+        public void Resize_IsAppliedToAllFrames<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Mutate(x => x.Resize(image.Width / 2, image.Height / 2, KnownResamplers.Bicubic));
+
+                // Comparer fights decoder with gif-s. Could not use CompareToReferenceOutput here :(
+                image.DebugSave(provider, extension: "gif");
+            }
+        }
+
+        [Theory]
+        [WithTestPatternImages(50, 50, CommonNonDefaultPixelTypes)]
+        public void Resize_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.RunValidatingProcessorTest(x => x.Resize(x.GetCurrentSize() / 2), comparer: ValidatorComparer);
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        public void Resize_ThrowsForWrappedMemoryImage<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image0 = provider.GetImage())
+            {
+                var mmg = TestMemoryManager<TPixel>.CreateAsCopyOf(image0.GetPixelSpan());
+
+                using (var image1 = Image.WrapMemory(mmg.Memory, image0.Width, image0.Height))
+                {
+                    Assert.ThrowsAny<Exception>(
+                        () => { image1.Mutate(x => x.Resize(image0.Width / 2, image0.Height / 2, true)); });
+                }
             }
         }
 
+        [Theory]
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 1)]
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 4)]
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 8)]
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, -1)]
+        public void Resize_WorksWithAllParallelismLevels<TPixel>(
+            TestImageProvider<TPixel> provider,
+            int maxDegreeOfParallelism)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Configuration.MaxDegreeOfParallelism =
+                maxDegreeOfParallelism > 0 ? maxDegreeOfParallelism : Environment.ProcessorCount;
+
+            FormattableString details = $"MDP{maxDegreeOfParallelism}";
+
+            provider.RunValidatingProcessorTest(
+                x => x.Resize(x.GetCurrentSize() / 2),
+                details,
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
+        }
+
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), nameof(AllResamplerNames), DefaultPixelType, 0.5f, null, null)]
-        [WithFileCollection(nameof(CommonTestImages), nameof(SmokeTestResamplerNames), DefaultPixelType, 0.3f, null, null)]
-        [WithFileCollection(nameof(CommonTestImages), nameof(SmokeTestResamplerNames), DefaultPixelType, 1.8f, null, null)]
+        [WithFileCollection(
+            nameof(CommonTestImages),
+            nameof(SmokeTestResamplerNames),
+            DefaultPixelType,
+            0.3f,
+            null,
+            null)]
+        [WithFileCollection(
+            nameof(CommonTestImages),
+            nameof(SmokeTestResamplerNames),
+            DefaultPixelType,
+            1.8f,
+            null,
+            null)]
         [WithTestPatternImages(nameof(SmokeTestResamplerNames), 100, 100, DefaultPixelType, 0.5f, null, null)]
         [WithTestPatternImages(nameof(SmokeTestResamplerNames), 100, 100, DefaultPixelType, 1f, null, null)]
         [WithTestPatternImages(nameof(SmokeTestResamplerNames), 50, 50, DefaultPixelType, 8f, null, null)]
@@ -84,15 +241,14 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             // Resize_WorksWithAllResamplers_TestPattern301x1180_NearestNeighbor-300x480.png
             // TODO: Should we investigate this?
             bool allowHigherInaccuracy = !TestEnvironment.Is64BitProcess
-                                       && string.IsNullOrEmpty(TestEnvironment.NetCoreVersion)
-                                       && sampler is NearestNeighborResampler;
+                                         && string.IsNullOrEmpty(TestEnvironment.NetCoreVersion)
+                                         && sampler is NearestNeighborResampler;
 
             var comparer = ImageComparer.TolerantPercentage(allowHigherInaccuracy ? 0.3f : 0.017f);
 
             provider.RunValidatingProcessorTest(
                 ctx =>
                     {
-                        
                         SizeF newSize;
                         string destSizeInfo;
                         if (ratio.HasValue)
@@ -126,107 +282,41 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 1)]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 4)]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, 8)]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType, -1)]
-        public void Resize_WorksWithAllParallelismLevels<TPixel>(TestImageProvider<TPixel> provider, int maxDegreeOfParallelism)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            provider.Configuration.MaxDegreeOfParallelism =
-                maxDegreeOfParallelism > 0 ? maxDegreeOfParallelism : Environment.ProcessorCount;
-
-            FormattableString details = $"MDP{maxDegreeOfParallelism}";
-
-            provider.RunValidatingProcessorTest(
-                x => x.Resize(x.GetCurrentSize() / 2),
-                details,
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-        }
-
-        [Theory]
-        [WithTestPatternImages(100, 100, DefaultPixelType)]
-        public void Resize_Compand<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        public void ResizeFromSourceRectangle<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Resize(image.Size() / 2, true));
+                var sourceRectangle = new Rectangle(
+                    image.Width / 8,
+                    image.Height / 8,
+                    image.Width / 4,
+                    image.Height / 4);
+                var destRectangle = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
+
+                image.Mutate(
+                    x => x.Resize(
+                        image.Width,
+                        image.Height,
+                        KnownResamplers.Bicubic,
+                        sourceRectangle,
+                        destRectangle,
+                        false));
 
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(ValidatorComparer, provider);
             }
         }
 
-        [Theory]
-        [WithTestPatternImages(50, 50, CommonNonDefaultPixelTypes)]
-        public void Resize_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            provider.RunValidatingProcessorTest(x => x.Resize(x.GetCurrentSize() / 2), comparer: ValidatorComparer);
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void Resize_ThrowsForWrappedMemoryImage<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image0 = provider.GetImage())
-            {
-                var mmg = TestMemoryManager<TPixel>.CreateAsCopyOf(image0.GetPixelSpan());
-
-                using (var image1 = Image.WrapMemory(mmg.Memory, image0.Width, image0.Height))
-                {
-                    Assert.ThrowsAny<Exception>(
-                        () =>
-                            {
-                                image1.Mutate(x => x.Resize(image0.Width / 2, image0.Height / 2, true));
-                            });
-                }
-            }
-        }
-
-        [Theory]
-        [WithFile(TestImages.Png.Kaboom, DefaultPixelType, false)]
-        [WithFile(TestImages.Png.Kaboom, DefaultPixelType, true)]
-        public void Resize_DoesNotBleedAlphaPixels<TPixel>(TestImageProvider<TPixel> provider, bool compand)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            string details = compand ? "Compand" : "";
-
-            provider.RunValidatingProcessorTest(
-                x => x.Resize(x.GetCurrentSize() / 2, compand),
-                details,
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-        }
-        
-        [Theory]
-        [WithFile(TestImages.Gif.Giphy, DefaultPixelType)]
-        public void Resize_IsAppliedToAllFrames<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Resize(image.Width / 2, image.Height / 2, KnownResamplers.Bicubic));
-
-                // Comparer fights decoder with gif-s. Could not use CompareToReferenceOutput here :(
-                image.DebugSave(provider, extension: "gif");
-            }
-        }
-
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeFromSourceRectangle<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeHeightAndKeepAspect<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                var sourceRectangle = new Rectangle(image.Width / 8, image.Height / 8, image.Width / 4, image.Height / 4);
-                var destRectangle = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Resize(image.Width, image.Height, KnownResamplers.Bicubic, sourceRectangle, destRectangle, false));
+                image.Mutate(x => x.Resize(0, image.Height / 3, false));
 
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(ValidatorComparer, provider);
@@ -234,27 +324,26 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWidthAndKeepAspect<TPixel>(TestImageProvider<TPixel> provider)
+        [WithTestPatternImages(10, 100, DefaultPixelType)]
+        public void ResizeHeightCannotKeepAspectKeepsOnePixel<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Resize(image.Width / 3, 0, false));
-
-                image.DebugSave(provider);
-                image.CompareToReferenceOutput(ValidatorComparer, provider);
+                image.Mutate(x => x.Resize(0, 5));
+                Assert.Equal(1, image.Width);
+                Assert.Equal(5, image.Height);
             }
         }
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeHeightAndKeepAspect<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWidthAndKeepAspect<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Resize(0, image.Height / 3, false));
+                image.Mutate(x => x.Resize(image.Width / 3, 0, false));
 
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(ValidatorComparer, provider);
@@ -274,30 +363,17 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             }
         }
 
-        [Theory]
-        [WithTestPatternImages(10, 100, DefaultPixelType)]
-        public void ResizeHeightCannotKeepAspectKeepsOnePixel<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Resize(0, 5));
-                Assert.Equal(1, image.Width);
-                Assert.Equal(5, image.Height);
-            }
-        }
-
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWithCropWidthMode<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWithBoxPadMode<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
                 var options = new ResizeOptions
-                {
-                    Size = new Size(image.Width / 2, image.Height)
-                };
+                                  {
+                                      Size = new Size(image.Width + 200, image.Height + 200), Mode = ResizeMode.BoxPad
+                                  };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -313,10 +389,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                var options = new ResizeOptions
-                {
-                    Size = new Size(image.Width, image.Height / 2)
-                };
+                var options = new ResizeOptions { Size = new Size(image.Width, image.Height / 2) };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -327,16 +400,12 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWithPadMode<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWithCropWidthMode<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                var options = new ResizeOptions
-                {
-                    Size = new Size(image.Width + 200, image.Height),
-                    Mode = ResizeMode.Pad
-                };
+                var options = new ResizeOptions { Size = new Size(image.Width / 2, image.Height) };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -347,16 +416,12 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWithBoxPadMode<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWithMaxMode<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                var options = new ResizeOptions
-                {
-                    Size = new Size(image.Width + 200, image.Height + 200),
-                    Mode = ResizeMode.BoxPad
-                };
+                var options = new ResizeOptions { Size = new Size(300, 300), Mode = ResizeMode.Max };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -367,16 +432,18 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWithMaxMode<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWithMinMode<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
                 var options = new ResizeOptions
-                {
-                    Size = new Size(300, 300),
-                    Mode = ResizeMode.Max
-                };
+                                  {
+                                      Size = new Size(
+                                          (int)Math.Round(image.Width * .75F),
+                                          (int)Math.Round(image.Height * .95F)),
+                                      Mode = ResizeMode.Min
+                                  };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -387,16 +454,15 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
-        public void ResizeWithMinMode<TPixel>(TestImageProvider<TPixel> provider)
+        public void ResizeWithPadMode<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
                 var options = new ResizeOptions
-                {
-                    Size = new Size((int)Math.Round(image.Width * .75F), (int)Math.Round(image.Height * .95F)),
-                    Mode = ResizeMode.Min
-                };
+                                  {
+                                      Size = new Size(image.Width + 200, image.Height), Mode = ResizeMode.Pad
+                                  };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -413,10 +479,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             using (Image<TPixel> image = provider.GetImage())
             {
                 var options = new ResizeOptions
-                {
-                    Size = new Size(image.Width / 2, image.Height),
-                    Mode = ResizeMode.Stretch
-                };
+                                  {
+                                      Size = new Size(image.Width / 2, image.Height), Mode = ResizeMode.Stretch
+                                  };
 
                 image.Mutate(x => x.Resize(options));
 
@@ -424,61 +489,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 image.CompareToReferenceOutput(ValidatorComparer, provider);
             }
         }
-
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void BicubicWindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Bicubic;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void TriangleWindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Triangle;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void Lanczos3WindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Lanczos3;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-4, 0)]
-        [InlineData(-2, 0)]
-        [InlineData(0, 1)]
-        [InlineData(2, 0)]
-        [InlineData(4, 0)]
-        public static void Lanczos5WindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Lanczos5;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
     }
 }
\ No newline at end of file

From 53892deeb7120c9c93e49a0ae621b12189971e53 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 22:13:51 +0200
Subject: [PATCH 061/223] ResizeWindow refactor 4

---
 .../Transforms/Resize/ResizeKernel.cs         | 29 +++++++++-------
 .../Transforms/Resize/ResizeProcessor.cs      | 17 +++++-----
 .../Transforms/Resize/ResizeWindow.cs         | 33 +++++++++++--------
 ...ResizeKernelMapTests.ReferenceKernelMap.cs |  2 +-
 .../Transforms/ResizeKernelMapTests.cs        |  4 +--
 5 files changed, 48 insertions(+), 37 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
index f349634ac0..28b3d3a4dd 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
@@ -19,27 +19,27 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// Initializes a new instance of the <see cref="ResizeKernel"/> struct.
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
-        internal ResizeKernel(int left, float* bufferPtr, int length)
+        internal ResizeKernel(int startIndex, float* bufferPtr, int length)
         {
-            this.Left = left;
+            this.StartIndex = startIndex;
             this.bufferPtr = bufferPtr;
             this.Length = length;
         }
 
         /// <summary>
-        /// Gets the left index for the destination row
+        /// Gets the start index for the destination row.
         /// </summary>
-        public int Left { get; }
+        public int StartIndex { get; }
 
         /// <summary>
-        /// Gets the the length of the kernel
+        /// Gets the the length of the kernel.
         /// </summary>
         public int Length { get; }
 
         /// <summary>
-        /// Gets the span representing the portion of the <see cref="ResizeKernelMap"/> that this window covers
+        /// Gets the span representing the portion of the <see cref="ResizeKernelMap"/> that this window covers.
         /// </summary>
-        /// <value>The <see cref="Span{T}"/>
+        /// <value>The <see cref="Span{T}"/>.
         /// </value>
         public Span<float> Values
         {
@@ -55,17 +55,22 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(InliningOptions.ShortMethod)]
         public Vector4 Convolve(Span<Vector4> rowSpan)
         {
-            ref float horizontalValues = ref Unsafe.AsRef<float>(this.bufferPtr);
-            int left = this.Left;
-            ref Vector4 vecPtr = ref Unsafe.Add(ref MemoryMarshal.GetReference(rowSpan), left);
+            ref Vector4 vecPtr = ref Unsafe.Add(ref MemoryMarshal.GetReference(rowSpan), this.StartIndex);
+
+            return this.ConvolveCore(ref vecPtr);
+        }
 
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Vector4 ConvolveCore(ref Vector4 rowStartRef)
+        {
+            ref float horizontalValues = ref Unsafe.AsRef<float>(this.bufferPtr);
             // Destination color components
             Vector4 result = Vector4.Zero;
 
             for (int i = 0; i < this.Length; i++)
             {
                 float weight = Unsafe.Add(ref horizontalValues, i);
-                Vector4 v = Unsafe.Add(ref vecPtr, i);
+                Vector4 v = Unsafe.Add(ref rowStartRef, i);
                 result += v * weight;
             }
 
@@ -73,7 +78,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <summary>
-        /// Copy the contents of <see cref="ResizeKernel"/> altering <see cref="Left"/>
+        /// Copy the contents of <see cref="ResizeKernel"/> altering <see cref="StartIndex"/>
         /// to the value <paramref name="left"/>.
         /// </summary>
         internal ResizeKernel AlterLeftValue(int left)
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 38419b5dd6..73f9b4241e 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -197,7 +197,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int startY = this.TargetRectangle.Y;
             int startX = this.TargetRectangle.X;
 
-            var workingRect = Rectangle.Intersect(
+            var destWorkingRect = Rectangle.Intersect(
                 this.TargetRectangle,
                 new Rectangle(0, 0, width, height));
 
@@ -208,7 +208,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
 
                 ParallelHelper.IterateRows(
-                    workingRect,
+                    destWorkingRect,
                     configuration,
                     rows =>
                     {
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                 source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
                             Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
 
-                            for (int x = workingRect.Left; x < workingRect.Right; x++)
+                            for (int x = destWorkingRect.Left; x < destWorkingRect.Right; x++)
                             {
                                 // X coordinates of source points
                                 targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
@@ -248,7 +248,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 this.horizontalKernelMap,
                 this.verticalKernelMap,
                 width,
-                workingRect,
+                destWorkingRect,
                 startX))
             using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(width))
             {
@@ -257,12 +257,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 // Now process the rows.
                 Span<Vector4> tempColSpan = tempBuffer.GetSpan();
 
-                for (int y = workingRect.Top; y < workingRect.Bottom; y++)
+                for (int y = destWorkingRect.Top; y < destWorkingRect.Bottom; y++)
                 {
                     // Ensure offsets are normalized for cropping and padding.
                     ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
-                    if (kernel.Left + kernel.Length > resizeWindow.Bottom)
+                    if (kernel.StartIndex + kernel.Length > resizeWindow.Bottom)
                     {
                         resizeWindow.Slide();
                     }
@@ -271,10 +271,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                     for (int x = 0; x < width; x++)
                     {
-                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x);
+                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x, kernel.StartIndex);
+                        ref Vector4 rowStartReference = ref MemoryMarshal.GetReference(firstPassColumn);
 
                         // Destination color components
-                        Unsafe.Add(ref tempRowBase, x) = kernel.Convolve(firstPassColumn);
+                        Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(ref rowStartReference);
                     }
 
                     Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
index 05015dee20..ba5f9a9849 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly ResizeKernelMap verticalKernelMap;
 
-        private readonly Rectangle workingRectangle;
+        private readonly Rectangle destWorkingRect;
 
         private readonly int diameter;
 
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             ResizeKernelMap horizontalKernelMap,
             ResizeKernelMap verticalKernelMap,
             int destWidth,
-            Rectangle workingRectangle,
+            Rectangle destWorkingRect,
             int startX)
         {
             this.configuration = configuration;
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.conversionModifiers = conversionModifiers;
             this.horizontalKernelMap = horizontalKernelMap;
             this.verticalKernelMap = verticalKernelMap;
-            this.workingRectangle = workingRectangle;
+            this.destWorkingRect = destWorkingRect;
             this.startX = startX;
 
             this.diameter = verticalKernelMap.MaxDiameter;
@@ -65,9 +65,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 AllocationOptions.Clean);
             this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
 
-            this.Top = this.sourceRectangle.Top;
+            this.Top = 0;
 
-            this.Bottom = this.sourceRectangle.Bottom;
+            this.Bottom = this.sourceRectangle.Height;
         }
 
         public int Bottom { get; private set; }
@@ -80,15 +80,25 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Span<Vector4> GetColumnSpan(int x)
+        public Span<Vector4> GetColumnSpan(int x, int startY)
         {
-            return this.buffer.GetRowSpan(x);
+            return this.buffer.GetRowSpan(x).Slice(startY);
         }
 
         public void Initialize()
+        {
+            this.Initialize(0, this.sourceRectangle.Height);
+        }
+
+        public void Slide()
+        {
+            throw new InvalidOperationException("Shouldn't happen yet!");
+        }
+
+        private void Initialize(int top, int bottom)
         {
             Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
-            for (int y = 0; y < this.sourceRectangle.Height; y++)
+            for (int y = top; y < bottom; y++)
             {
                 Span<TPixel> sourceRow = this.source.GetRowSpan(y);
 
@@ -100,17 +110,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 ref Vector4 firstPassBaseRef = ref this.buffer.Span[y];
 
-                for (int x = this.workingRectangle.Left; x < this.workingRectangle.Right; x++)
+                for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
                 {
                     ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
                     Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
                 }
             }
         }
-
-        public void Slide()
-        {
-            throw new InvalidOperationException("Shouldn't happen yet!");
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.ReferenceKernelMap.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.ReferenceKernelMap.cs
index 7d842c4e1e..2c5914253a 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.ReferenceKernelMap.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.ReferenceKernelMap.cs
@@ -104,7 +104,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
             public static implicit operator ReferenceKernel(ResizeKernel orig)
             {
-                return new ReferenceKernel(orig.Left, orig.Values.ToArray());
+                return new ReferenceKernel(orig.StartIndex, orig.Values.ToArray());
             }
         }
     }
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
index 9de8665869..1bd909e7ea 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
@@ -151,8 +151,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                     referenceKernel.Length == kernel.Length,
                     $"referenceKernel.Length != kernel.Length: {referenceKernel.Length} != {kernel.Length}");
                 Assert.True(
-                    referenceKernel.Left == kernel.Left,
-                    $"referenceKernel.Left != kernel.Left: {referenceKernel.Left} != {kernel.Left}");
+                    referenceKernel.Left == kernel.StartIndex,
+                    $"referenceKernel.Left != kernel.Left: {referenceKernel.Left} != {kernel.StartIndex}");
                 float[] expectedValues = referenceKernel.Values;
                 Span<float> actualValues = kernel.Values;
 

From 7be9d82941f9768ea44071bcbe5f2b93b6f86429 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 23:29:43 +0200
Subject: [PATCH 062/223] basic sliding window implementation (semi-stable
 state)

---
 .../Transforms/Resize/ResizeKernel.cs         |  9 +++----
 .../Transforms/Resize/ResizeProcessor.cs      |  3 +--
 .../Transforms/Resize/ResizeWindow.cs         | 27 ++++++++++++-------
 .../Processors/Transforms/ResizeTests.cs      |  1 +
 4 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
index 28b3d3a4dd..4606f482cd 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
@@ -55,13 +55,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(InliningOptions.ShortMethod)]
         public Vector4 Convolve(Span<Vector4> rowSpan)
         {
-            ref Vector4 vecPtr = ref Unsafe.Add(ref MemoryMarshal.GetReference(rowSpan), this.StartIndex);
-
-            return this.ConvolveCore(ref vecPtr);
+            return this.ConvolveCore(rowSpan.Slice(this.StartIndex));
         }
 
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Vector4 ConvolveCore(ref Vector4 rowStartRef)
+        public Vector4 ConvolveCore(Span<Vector4> offsetedRowSpan)
         {
             ref float horizontalValues = ref Unsafe.AsRef<float>(this.bufferPtr);
             // Destination color components
@@ -70,7 +68,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             for (int i = 0; i < this.Length; i++)
             {
                 float weight = Unsafe.Add(ref horizontalValues, i);
-                Vector4 v = Unsafe.Add(ref rowStartRef, i);
+                //Vector4 v = Unsafe.Add(ref rowStartRef, i);
+                Vector4 v = offsetedRowSpan[i];
                 result += v * weight;
             }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 73f9b4241e..abbe5908e7 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -272,10 +272,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     for (int x = 0; x < width; x++)
                     {
                         Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x, kernel.StartIndex);
-                        ref Vector4 rowStartReference = ref MemoryMarshal.GetReference(firstPassColumn);
 
                         // Destination color components
-                        Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(ref rowStartReference);
+                        Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(firstPassColumn);
                     }
 
                     Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
index ba5f9a9849..8221a9cc43 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -38,6 +38,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly int diameter;
 
+        private readonly int windowHeight;
+
         public ResizeWindow(
             Configuration configuration,
             BufferArea<TPixel> source,
@@ -59,15 +61,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
             this.diameter = verticalKernelMap.MaxDiameter;
 
+            this.windowHeight = Math.Min(this.sourceRectangle.Height, 2 * this.diameter);
+
             this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
-                this.sourceRectangle.Height,
+                this.windowHeight,
                 destWidth,
                 AllocationOptions.Clean);
             this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
-
-            this.Top = 0;
-
-            this.Bottom = this.sourceRectangle.Height;
         }
 
         public int Bottom { get; private set; }
@@ -82,21 +82,26 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public Span<Vector4> GetColumnSpan(int x, int startY)
         {
-            return this.buffer.GetRowSpan(x).Slice(startY);
+            return this.buffer.GetRowSpan(x).Slice(startY - this.Top);
         }
 
         public void Initialize()
         {
-            this.Initialize(0, this.sourceRectangle.Height);
+            this.Initialize(0, this.windowHeight);
         }
 
         public void Slide()
         {
-            throw new InvalidOperationException("Shouldn't happen yet!");
+            int top = this.Top + this.diameter;
+            int bottom = Math.Min(this.Bottom + this.diameter, this.sourceRectangle.Height);
+            this.Initialize(top, bottom);
         }
 
         private void Initialize(int top, int bottom)
         {
+            this.Top = top;
+            this.Bottom = bottom;
+
             Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
             for (int y = top; y < bottom; y++)
             {
@@ -108,12 +113,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     tempRowSpan,
                     this.conversionModifiers);
 
-                ref Vector4 firstPassBaseRef = ref this.buffer.Span[y];
+                //ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
+                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - top);
 
                 for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
                 {
                     ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
-                    Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
+                    firstPassSpan[x * this.windowHeight] = kernel.Convolve(tempRowSpan);
+                    //Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
                 }
             }
         }
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 8c59fff26b..3d6f08a152 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -102,6 +102,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             // [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)] means:
             // resizing: (15, 12) -> (10, 6)
             // kernel dimensions: (3, 4)
+            
 
             using (Image<TPixel> image = provider.GetImage())
             {

From 23350cd57644109b8e99042aacdd6e5a3131a052 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 14 Apr 2019 23:51:08 +0200
Subject: [PATCH 063/223] fix ResizeWithCropHeightMode

---
 .../Processing/Processors/Transforms/Resize/ResizeProcessor.cs  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index abbe5908e7..9508d7c009 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -262,7 +262,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     // Ensure offsets are normalized for cropping and padding.
                     ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
-                    if (kernel.StartIndex + kernel.Length > resizeWindow.Bottom)
+                    while (kernel.StartIndex + kernel.Length > resizeWindow.Bottom)
                     {
                         resizeWindow.Slide();
                     }

From 40d036678807e009c3b6e80b74b967d9010788d6 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 15 Apr 2019 01:24:22 +0200
Subject: [PATCH 064/223] reference output for Resize_BasicSmall

---
 tests/Images/External | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/Images/External b/tests/Images/External
index 94b5a8e11b..c7333d2a81 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 94b5a8e11b33ba62c15d1d03f1b8b721468764f1
+Subproject commit c7333d2a81a74d1936bd202bcb6b16cbfe6bcdce

From 5108752e5cad94ad0883c2eb2bc16e79c2204394 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 15 Apr 2019 01:46:21 +0200
Subject: [PATCH 065/223] minor optimization

---
 .../Processors/Transforms/Resize/ResizeProcessor.cs         | 4 +++-
 .../Processing/Processors/Transforms/Resize/ResizeWindow.cs | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 9508d7c009..d61cc5e89c 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -269,9 +269,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                     ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
 
+                    int top = kernel.StartIndex - resizeWindow.Top;
+
                     for (int x = 0; x < width; x++)
                     {
-                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x, kernel.StartIndex);
+                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x).Slice(top);
 
                         // Destination color components
                         Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(firstPassColumn);
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
index 8221a9cc43..afa9dac2d2 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
@@ -85,6 +85,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             return this.buffer.GetRowSpan(x).Slice(startY - this.Top);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Span<Vector4> GetColumnSpan(int x)
+        {
+            return this.buffer.GetRowSpan(x);
+        }
+
         public void Initialize()
         {
             this.Initialize(0, this.windowHeight);

From 743e3519880a47bbd8cf981f82e61c5f098b0ffc Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Mon, 15 Apr 2019 18:02:39 +1000
Subject: [PATCH 066/223] Handle incorrect colorspace metadata. Fix #882 (#885)

---
 src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs      | 13 ++++++-------
 .../Formats/Jpg/JpegDecoderTests.Images.cs          |  5 ++++-
 tests/ImageSharp.Tests/TestImages.cs                |  1 +
 tests/Images/External                               |  2 +-
 .../Jpg/issues/issue855-incorrect-colorspace.jpg    |  3 +++
 5 files changed, 15 insertions(+), 9 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/issues/issue855-incorrect-colorspace.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 9852b36e49..6d6983f191 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -401,15 +401,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
 
             if (this.ComponentCount == 3)
             {
-                if (this.adobe.Equals(default) || this.adobe.ColorTransform == JpegConstants.Adobe.ColorTransformYCbCr)
-                {
-                    return JpegColorSpace.YCbCr;
-                }
-
-                if (this.adobe.ColorTransform == JpegConstants.Adobe.ColorTransformUnknown)
+                if (!this.adobe.Equals(default) && this.adobe.ColorTransform == JpegConstants.Adobe.ColorTransformUnknown)
                 {
                     return JpegColorSpace.RGB;
                 }
+
+                // Some images are poorly encoded and contain incorrect colorspace transform metadata.
+                // We ignore that and always fall back to the default colorspace.
+                return JpegColorSpace.YCbCr;
             }
 
             if (this.ComponentCount == 4)
@@ -419,7 +418,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                     : JpegColorSpace.Cmyk;
             }
 
-            JpegThrowHelper.ThrowImageFormatException($"Unsupported color mode. Max components 4; found {this.ComponentCount}");
+            JpegThrowHelper.ThrowImageFormatException($"Unsupported color mode. Supported component counts 1, 3, and 4; found {this.ComponentCount}");
             return default;
         }
 
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 8a94826077..442fcb3d12 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -31,9 +31,12 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Issues.ExifGetString750Load,
                 TestImages.Jpeg.Issues.ExifGetString750Transform,
 
-                // LibJpeg can open this despite the invalid desity units.
+                // LibJpeg can open this despite the invalid density units.
                 TestImages.Jpeg.Issues.Fuzz.ArgumentOutOfRangeException825B,
 
+                // LibJpeg can open this despite incorrect colorspace metadata.
+                TestImages.Jpeg.Issues.IncorrectColorspace855,
+
                 // High depth images
                 TestImages.Jpeg.Baseline.Testorig12bit,
             };
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 1efb9e35fd..8b2fd2e7f8 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -175,6 +175,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string ExifGetString750Transform = "Jpg/issues/issue750-exif-tranform.jpg";
                 public const string ExifGetString750Load = "Jpg/issues/issue750-exif-load.jpg";
                 public const string IncorrectQuality845 = "Jpg/issues/Issue845-Incorrect-Quality99.jpg";
+                public const string IncorrectColorspace855 = "Jpg/issues/issue855-incorrect-colorspace.jpg";
 
                 public static class Fuzz
                 {
diff --git a/tests/Images/External b/tests/Images/External
index 94b5a8e11b..802725dec2 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 94b5a8e11b33ba62c15d1d03f1b8b721468764f1
+Subproject commit 802725dec2a6b1ca02f9e2f9a4c3f625583d0696
diff --git a/tests/Images/Input/Jpg/issues/issue855-incorrect-colorspace.jpg b/tests/Images/Input/Jpg/issues/issue855-incorrect-colorspace.jpg
new file mode 100644
index 0000000000..77c0327680
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/issue855-incorrect-colorspace.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fabf628f032dce427a6a0e0f252404d66dc4ce2cd7ee2d7ec72a1fbe79c625d0
+size 142656

From ec1971435b55510355f2dbf14891b69563b581c1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 18 Apr 2019 23:43:44 +0200
Subject: [PATCH 067/223] refactor - ResizeWindow -> ResizeWorker - Most logic
 moved to ResizeWorker

---
 .../Transforms/Resize/ResizeProcessor.cs      | 42 ++---------
 .../{ResizeWindow.cs => ResizeWorker.cs}      | 72 +++++++++++++++----
 2 files changed, 62 insertions(+), 52 deletions(-)
 rename src/ImageSharp/Processing/Processors/Transforms/Resize/{ResizeWindow.cs => ResizeWorker.cs} (61%)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index d61cc5e89c..63dd5efca0 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -237,11 +237,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
             BufferArea<TPixel> sourceArea = source.PixelBuffer.GetArea(sourceRectangle);
 
-            // Interpolate the image using the calculated weights.
-            // A 2-pass 1D algorithm appears to be faster than splitting a 1-pass 2D algorithm
-            // First process the columns. Since we are not using multiple threads startY and endY
-            // are the upper and lower bounds of the source rectangle.
-            using (var resizeWindow = new ResizeWindow<TPixel>(
+            // If we want to reintroduce processing:
+            // it's possible to launch multiple workers for different regions of the image
+            using (var worker = new ResizeWorker<TPixel>(
                 configuration,
                 sourceArea,
                 conversionModifiers,
@@ -250,39 +248,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 width,
                 destWorkingRect,
                 startX))
-            using (IMemoryOwner<Vector4> tempBuffer = source.MemoryAllocator.Allocate<Vector4>(width))
             {
-                resizeWindow.Initialize();
-
-                // Now process the rows.
-                Span<Vector4> tempColSpan = tempBuffer.GetSpan();
-
-                for (int y = destWorkingRect.Top; y < destWorkingRect.Bottom; y++)
-                {
-                    // Ensure offsets are normalized for cropping and padding.
-                    ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
-
-                    while (kernel.StartIndex + kernel.Length > resizeWindow.Bottom)
-                    {
-                        resizeWindow.Slide();
-                    }
-
-                    ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
-
-                    int top = kernel.StartIndex - resizeWindow.Top;
-
-                    for (int x = 0; x < width; x++)
-                    {
-                        Span<Vector4> firstPassColumn = resizeWindow.GetColumnSpan(x).Slice(top);
-
-                        // Destination color components
-                        Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(firstPassColumn);
-                    }
-
-                    Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
-
-                    PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempColSpan, targetRowSpan, conversionModifiers);
-                }
+                worker.Initialize();
+                worker.FillDestinationPixels(destWorkingRect.Top, destWorkingRect.Bottom, startY, destination.PixelBuffer);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
similarity index 61%
rename from src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
rename to src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index afa9dac2d2..11b49b8631 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWindow.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -5,6 +5,7 @@ using System;
 using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
@@ -13,7 +14,7 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    internal class ResizeWindow<TPixel> : IDisposable
+    internal class ResizeWorker<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly Buffer2D<Vector4> buffer;
@@ -32,15 +33,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly IMemoryOwner<Vector4> tempRowBuffer;
 
+        private readonly IMemoryOwner<Vector4> tempColumnBuffer;
+
         private readonly ResizeKernelMap verticalKernelMap;
 
+        private readonly int destWidth;
+
         private readonly Rectangle destWorkingRect;
 
         private readonly int diameter;
 
         private readonly int windowHeight;
 
-        public ResizeWindow(
+        public ResizeWorker(
             Configuration configuration,
             BufferArea<TPixel> source,
             PixelConversionModifiers conversionModifiers,
@@ -56,6 +61,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.conversionModifiers = conversionModifiers;
             this.horizontalKernelMap = horizontalKernelMap;
             this.verticalKernelMap = verticalKernelMap;
+            this.destWidth = destWidth;
             this.destWorkingRect = destWorkingRect;
             this.startX = startX;
 
@@ -67,22 +73,29 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 this.windowHeight,
                 destWidth,
                 AllocationOptions.Clean);
+
             this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
+            this.tempColumnBuffer = configuration.MemoryAllocator.Allocate<Vector4>(destWidth);
+
+            this.CurrentMinY = 0;
+            this.CurrentMaxY = this.windowHeight;
         }
 
-        public int Bottom { get; private set; }
+        public int CurrentMaxY { get; private set; }
 
-        public int Top { get; private set; }
+        public int CurrentMinY { get; private set; }
 
         public void Dispose()
         {
             this.buffer.Dispose();
+            this.tempRowBuffer.Dispose();
+            this.tempColumnBuffer.Dispose();
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public Span<Vector4> GetColumnSpan(int x, int startY)
         {
-            return this.buffer.GetRowSpan(x).Slice(startY - this.Top);
+            return this.buffer.GetRowSpan(x).Slice(startY - this.CurrentMinY);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -93,23 +106,52 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         public void Initialize()
         {
-            this.Initialize(0, this.windowHeight);
+            this.CalculateFirstPassValues(0, this.windowHeight);
         }
 
-        public void Slide()
+        public void FillDestinationPixels(int minY, int maxY, int startY, Buffer2D<TPixel> destination)
         {
-            int top = this.Top + this.diameter;
-            int bottom = Math.Min(this.Bottom + this.diameter, this.sourceRectangle.Height);
-            this.Initialize(top, bottom);
+            Span<Vector4> tempColSpan = this.tempColumnBuffer.GetSpan();
+
+            for (int y = minY; y < maxY; y++)
+            {
+                // Ensure offsets are normalized for cropping and padding.
+                ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
+
+                while (kernel.StartIndex + kernel.Length > this.CurrentMaxY)
+                {
+                    this.Slide();
+                }
+
+                ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
+
+                int top = kernel.StartIndex - this.CurrentMinY;
+
+                for (int x = 0; x < this.destWidth; x++)
+                {
+                    Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
+
+                    // Destination color components
+                    Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(firstPassColumn);
+                }
+
+                Span<TPixel> targetRowSpan = destination.GetRowSpan(y);
+
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempColSpan, targetRowSpan, conversionModifiers);
+            }
         }
 
-        private void Initialize(int top, int bottom)
+        public void Slide()
         {
-            this.Top = top;
-            this.Bottom = bottom;
+            this.CurrentMinY = this.CurrentMinY + this.diameter;
+            this.CurrentMaxY = Math.Min(this.CurrentMaxY + this.diameter, this.sourceRectangle.Height);
+            this.CalculateFirstPassValues(this.CurrentMinY, this.CurrentMaxY);
+        }
 
+        private void CalculateFirstPassValues(int minY, int maxY)
+        {
             Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
-            for (int y = top; y < bottom; y++)
+            for (int y = minY; y < maxY; y++)
             {
                 Span<TPixel> sourceRow = this.source.GetRowSpan(y);
 
@@ -120,7 +162,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     this.conversionModifiers);
 
                 //ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
-                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - top);
+                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - minY);
 
                 for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
                 {

From 07808bf8eb80c4a9d4b5531ba003ebb681667494 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 00:23:06 +0200
Subject: [PATCH 068/223] refactor stuff + implement
 CalculateResizeWorkerWindowCount()

---
 src/ImageSharp/Configuration.cs               |  13 +-
 .../Transforms/Resize}/ResizeHelper.cs        | 339 ++++++++++--------
 tests/ImageSharp.Tests/ConfigurationTests.cs  |  17 +-
 .../Processors/Transforms/ResizeTests.cs      |  19 +
 4 files changed, 232 insertions(+), 156 deletions(-)
 rename src/ImageSharp/Processing/{ => Processors/Transforms/Resize}/ResizeHelper.cs (88%)

diff --git a/src/ImageSharp/Configuration.cs b/src/ImageSharp/Configuration.cs
index c0064d1877..b1767101d4 100644
--- a/src/ImageSharp/Configuration.cs
+++ b/src/ImageSharp/Configuration.cs
@@ -10,6 +10,7 @@ using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp
@@ -102,6 +103,15 @@ namespace SixLabors.ImageSharp
         /// </summary>
         internal IFileSystem FileSystem { get; set; } = new LocalFileSystem();
 
+        /// <summary>
+        /// Gets or sets the working buffer size hint for image processors.
+        /// The default value is 1MB.
+        /// </summary>
+        /// <remarks>
+        /// Currently only used by <see cref="ResizeProcessor{TPixel}"/>.
+        /// </remarks>
+        internal int WorkingBufferSizeHintInBytes { get; set; } = 1 * 1024 * 1024;
+
         /// <summary>
         /// Gets or sets the image operations provider factory.
         /// </summary>
@@ -130,7 +140,8 @@ namespace SixLabors.ImageSharp
                 MemoryAllocator = this.MemoryAllocator,
                 ImageOperationsProvider = this.ImageOperationsProvider,
                 ReadOrigin = this.ReadOrigin,
-                FileSystem = this.FileSystem
+                FileSystem = this.FileSystem,
+                WorkingBufferSizeHintInBytes = this.WorkingBufferSizeHintInBytes,
             };
         }
 
diff --git a/src/ImageSharp/Processing/ResizeHelper.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
similarity index 88%
rename from src/ImageSharp/Processing/ResizeHelper.cs
rename to src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
index 3ae632162f..0bc8cfda02 100644
--- a/src/ImageSharp/Processing/ResizeHelper.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
@@ -1,11 +1,13 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Linq;
+using System.Numerics;
+
 using SixLabors.Primitives;
 
-namespace SixLabors.ImageSharp.Processing
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
     /// Provides methods to help calculate the target rectangle when resizing using the
@@ -13,6 +15,16 @@ namespace SixLabors.ImageSharp.Processing
     /// </summary>
     internal static class ResizeHelper
     {
+        public static unsafe int CalculateResizeWorkerWindowCount(
+            int windowDiameter,
+            int width,
+            int sizeLimitHintInBytes)
+        {
+            int sizeLimitHint = sizeLimitHintInBytes / sizeof(Vector4);
+            int sizeOfOneWindow = windowDiameter * width;
+            return Math.Max(2, sizeLimitHint / sizeOfOneWindow);
+        }
+
         /// <summary>
         /// Calculates the target location and bounds to perform the resize operation against.
         /// </summary>
@@ -21,9 +33,13 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="width">The target width</param>
         /// <param name="height">The target height</param>
         /// <returns>
-        /// The <see cref="ValueTuple{Size,Rectangle}"/>.
+        /// The tuple representing the location and the bounds
         /// </returns>
-        public static (Size, Rectangle) CalculateTargetLocationAndBounds(Size sourceSize, ResizeOptions options, int width, int height)
+        public static (Size, Rectangle) CalculateTargetLocationAndBounds(
+            Size sourceSize,
+            ResizeOptions options,
+            int width,
+            int height)
         {
             switch (options.Mode)
             {
@@ -44,7 +60,90 @@ namespace SixLabors.ImageSharp.Processing
             }
         }
 
-        private static (Size, Rectangle) CalculateCropRectangle(Size source, ResizeOptions options, int width, int height)
+        private static (Size, Rectangle) CalculateBoxPadRectangle(
+            Size source,
+            ResizeOptions options,
+            int width,
+            int height)
+        {
+            if (width <= 0 || height <= 0)
+            {
+                return (new Size(source.Width, source.Height), new Rectangle(0, 0, source.Width, source.Height));
+            }
+
+            int sourceWidth = source.Width;
+            int sourceHeight = source.Height;
+
+            // Fractional variants for preserving aspect ratio.
+            float percentHeight = MathF.Abs(height / (float)sourceHeight);
+            float percentWidth = MathF.Abs(width / (float)sourceWidth);
+
+            int boxPadHeight = height > 0 ? height : (int)MathF.Round(sourceHeight * percentWidth);
+            int boxPadWidth = width > 0 ? width : (int)MathF.Round(sourceWidth * percentHeight);
+
+            // Only calculate if upscaling.
+            if (sourceWidth < boxPadWidth && sourceHeight < boxPadHeight)
+            {
+                int destinationX;
+                int destinationY;
+                int destinationWidth = sourceWidth;
+                int destinationHeight = sourceHeight;
+                width = boxPadWidth;
+                height = boxPadHeight;
+
+                switch (options.Position)
+                {
+                    case AnchorPositionMode.Left:
+                        destinationY = (height - sourceHeight) / 2;
+                        destinationX = 0;
+                        break;
+                    case AnchorPositionMode.Right:
+                        destinationY = (height - sourceHeight) / 2;
+                        destinationX = width - sourceWidth;
+                        break;
+                    case AnchorPositionMode.TopRight:
+                        destinationY = 0;
+                        destinationX = width - sourceWidth;
+                        break;
+                    case AnchorPositionMode.Top:
+                        destinationY = 0;
+                        destinationX = (width - sourceWidth) / 2;
+                        break;
+                    case AnchorPositionMode.TopLeft:
+                        destinationY = 0;
+                        destinationX = 0;
+                        break;
+                    case AnchorPositionMode.BottomRight:
+                        destinationY = height - sourceHeight;
+                        destinationX = width - sourceWidth;
+                        break;
+                    case AnchorPositionMode.Bottom:
+                        destinationY = height - sourceHeight;
+                        destinationX = (width - sourceWidth) / 2;
+                        break;
+                    case AnchorPositionMode.BottomLeft:
+                        destinationY = height - sourceHeight;
+                        destinationX = 0;
+                        break;
+                    default:
+                        destinationY = (height - sourceHeight) / 2;
+                        destinationX = (width - sourceWidth) / 2;
+                        break;
+                }
+
+                return (new Size(width, height),
+                           new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
+            }
+
+            // Switch to pad mode to downscale and calculate from there.
+            return CalculatePadRectangle(source, options, width, height);
+        }
+
+        private static (Size, Rectangle) CalculateCropRectangle(
+            Size source,
+            ResizeOptions options,
+            int width,
+            int height)
         {
             if (width <= 0 || height <= 0)
             {
@@ -147,152 +246,15 @@ namespace SixLabors.ImageSharp.Processing
                 destinationWidth = (int)MathF.Ceiling(sourceWidth * percentHeight);
             }
 
-            return (new Size(width, height), new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
-        }
-
-        private static (Size, Rectangle) CalculatePadRectangle(Size source, ResizeOptions options, int width, int height)
-        {
-            if (width <= 0 || height <= 0)
-            {
-                return (new Size(source.Width, source.Height), new Rectangle(0, 0, source.Width, source.Height));
-            }
-
-            float ratio;
-            int sourceWidth = source.Width;
-            int sourceHeight = source.Height;
-
-            int destinationX = 0;
-            int destinationY = 0;
-            int destinationWidth = width;
-            int destinationHeight = height;
-
-            // Fractional variants for preserving aspect ratio.
-            float percentHeight = MathF.Abs(height / (float)sourceHeight);
-            float percentWidth = MathF.Abs(width / (float)sourceWidth);
-
-            if (percentHeight < percentWidth)
-            {
-                ratio = percentHeight;
-                destinationWidth = (int)MathF.Round(sourceWidth * percentHeight);
-
-                switch (options.Position)
-                {
-                    case AnchorPositionMode.Left:
-                    case AnchorPositionMode.TopLeft:
-                    case AnchorPositionMode.BottomLeft:
-                        destinationX = 0;
-                        break;
-                    case AnchorPositionMode.Right:
-                    case AnchorPositionMode.TopRight:
-                    case AnchorPositionMode.BottomRight:
-                        destinationX = (int)MathF.Round(width - (sourceWidth * ratio));
-                        break;
-                    default:
-                        destinationX = (int)MathF.Round((width - (sourceWidth * ratio)) / 2F);
-                        break;
-                }
-            }
-            else
-            {
-                ratio = percentWidth;
-                destinationHeight = (int)MathF.Round(sourceHeight * percentWidth);
-
-                switch (options.Position)
-                {
-                    case AnchorPositionMode.Top:
-                    case AnchorPositionMode.TopLeft:
-                    case AnchorPositionMode.TopRight:
-                        destinationY = 0;
-                        break;
-                    case AnchorPositionMode.Bottom:
-                    case AnchorPositionMode.BottomLeft:
-                    case AnchorPositionMode.BottomRight:
-                        destinationY = (int)MathF.Round(height - (sourceHeight * ratio));
-                        break;
-                    default:
-                        destinationY = (int)MathF.Round((height - (sourceHeight * ratio)) / 2F);
-                        break;
-                }
-            }
-
-            return (new Size(width, height), new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
-        }
-
-        private static (Size, Rectangle) CalculateBoxPadRectangle(Size source, ResizeOptions options, int width, int height)
-        {
-            if (width <= 0 || height <= 0)
-            {
-                return (new Size(source.Width, source.Height), new Rectangle(0, 0, source.Width, source.Height));
-            }
-
-            int sourceWidth = source.Width;
-            int sourceHeight = source.Height;
-
-            // Fractional variants for preserving aspect ratio.
-            float percentHeight = MathF.Abs(height / (float)sourceHeight);
-            float percentWidth = MathF.Abs(width / (float)sourceWidth);
-
-            int boxPadHeight = height > 0 ? height : (int)MathF.Round(sourceHeight * percentWidth);
-            int boxPadWidth = width > 0 ? width : (int)MathF.Round(sourceWidth * percentHeight);
-
-            // Only calculate if upscaling.
-            if (sourceWidth < boxPadWidth && sourceHeight < boxPadHeight)
-            {
-                int destinationX;
-                int destinationY;
-                int destinationWidth = sourceWidth;
-                int destinationHeight = sourceHeight;
-                width = boxPadWidth;
-                height = boxPadHeight;
-
-                switch (options.Position)
-                {
-                    case AnchorPositionMode.Left:
-                        destinationY = (height - sourceHeight) / 2;
-                        destinationX = 0;
-                        break;
-                    case AnchorPositionMode.Right:
-                        destinationY = (height - sourceHeight) / 2;
-                        destinationX = width - sourceWidth;
-                        break;
-                    case AnchorPositionMode.TopRight:
-                        destinationY = 0;
-                        destinationX = width - sourceWidth;
-                        break;
-                    case AnchorPositionMode.Top:
-                        destinationY = 0;
-                        destinationX = (width - sourceWidth) / 2;
-                        break;
-                    case AnchorPositionMode.TopLeft:
-                        destinationY = 0;
-                        destinationX = 0;
-                        break;
-                    case AnchorPositionMode.BottomRight:
-                        destinationY = height - sourceHeight;
-                        destinationX = width - sourceWidth;
-                        break;
-                    case AnchorPositionMode.Bottom:
-                        destinationY = height - sourceHeight;
-                        destinationX = (width - sourceWidth) / 2;
-                        break;
-                    case AnchorPositionMode.BottomLeft:
-                        destinationY = height - sourceHeight;
-                        destinationX = 0;
-                        break;
-                    default:
-                        destinationY = (height - sourceHeight) / 2;
-                        destinationX = (width - sourceWidth) / 2;
-                        break;
-                }
-
-                return (new Size(width, height), new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
-            }
-
-            // Switch to pad mode to downscale and calculate from there.
-            return CalculatePadRectangle(source, options, width, height);
+            return (new Size(width, height),
+                       new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
         }
 
-        private static (Size, Rectangle) CalculateMaxRectangle(Size source, ResizeOptions options, int width, int height)
+        private static (Size, Rectangle) CalculateMaxRectangle(
+            Size source,
+            ResizeOptions options,
+            int width,
+            int height)
         {
             int destinationWidth = width;
             int destinationHeight = height;
@@ -320,7 +282,11 @@ namespace SixLabors.ImageSharp.Processing
             return (new Size(width, height), new Rectangle(0, 0, destinationWidth, destinationHeight));
         }
 
-        private static (Size, Rectangle) CalculateMinRectangle(Size source, ResizeOptions options, int width, int height)
+        private static (Size, Rectangle) CalculateMinRectangle(
+            Size source,
+            ResizeOptions options,
+            int width,
+            int height)
         {
             int sourceWidth = source.Width;
             int sourceHeight = source.Height;
@@ -372,5 +338,78 @@ namespace SixLabors.ImageSharp.Processing
             // Replace the size to match the rectangle.
             return (new Size(width, height), new Rectangle(0, 0, destinationWidth, destinationHeight));
         }
+
+        private static (Size, Rectangle) CalculatePadRectangle(
+            Size source,
+            ResizeOptions options,
+            int width,
+            int height)
+        {
+            if (width <= 0 || height <= 0)
+            {
+                return (new Size(source.Width, source.Height), new Rectangle(0, 0, source.Width, source.Height));
+            }
+
+            float ratio;
+            int sourceWidth = source.Width;
+            int sourceHeight = source.Height;
+
+            int destinationX = 0;
+            int destinationY = 0;
+            int destinationWidth = width;
+            int destinationHeight = height;
+
+            // Fractional variants for preserving aspect ratio.
+            float percentHeight = MathF.Abs(height / (float)sourceHeight);
+            float percentWidth = MathF.Abs(width / (float)sourceWidth);
+
+            if (percentHeight < percentWidth)
+            {
+                ratio = percentHeight;
+                destinationWidth = (int)MathF.Round(sourceWidth * percentHeight);
+
+                switch (options.Position)
+                {
+                    case AnchorPositionMode.Left:
+                    case AnchorPositionMode.TopLeft:
+                    case AnchorPositionMode.BottomLeft:
+                        destinationX = 0;
+                        break;
+                    case AnchorPositionMode.Right:
+                    case AnchorPositionMode.TopRight:
+                    case AnchorPositionMode.BottomRight:
+                        destinationX = (int)MathF.Round(width - (sourceWidth * ratio));
+                        break;
+                    default:
+                        destinationX = (int)MathF.Round((width - (sourceWidth * ratio)) / 2F);
+                        break;
+                }
+            }
+            else
+            {
+                ratio = percentWidth;
+                destinationHeight = (int)MathF.Round(sourceHeight * percentWidth);
+
+                switch (options.Position)
+                {
+                    case AnchorPositionMode.Top:
+                    case AnchorPositionMode.TopLeft:
+                    case AnchorPositionMode.TopRight:
+                        destinationY = 0;
+                        break;
+                    case AnchorPositionMode.Bottom:
+                    case AnchorPositionMode.BottomLeft:
+                    case AnchorPositionMode.BottomRight:
+                        destinationY = (int)MathF.Round(height - (sourceHeight * ratio));
+                        break;
+                    default:
+                        destinationY = (int)MathF.Round((height - (sourceHeight * ratio)) / 2F);
+                        break;
+                }
+            }
+
+            return (new Size(width, height),
+                       new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/ConfigurationTests.cs b/tests/ImageSharp.Tests/ConfigurationTests.cs
index 208387e6d1..6f68d04288 100644
--- a/tests/ImageSharp.Tests/ConfigurationTests.cs
+++ b/tests/ImageSharp.Tests/ConfigurationTests.cs
@@ -39,13 +39,13 @@ namespace SixLabors.ImageSharp.Tests
         /// Test that the default configuration is not null.
         /// </summary>
         [Fact]
-        public void TestDefaultConfigurationIsNotNull() => Assert.True(Configuration.Default != null);
+        public void TestDefaultConfigurationIsNotNull() => Assert.True(this.DefaultConfiguration != null);
 
         /// <summary>
         /// Test that the default configuration read origin options is set to begin.
         /// </summary>
         [Fact]
-        public void TestDefaultConfigurationReadOriginIsCurrent() => Assert.True(Configuration.Default.ReadOrigin == ReadOrigin.Current);
+        public void TestDefaultConfigurationReadOriginIsCurrent() => Assert.True(this.DefaultConfiguration.ReadOrigin == ReadOrigin.Current);
 
         /// <summary>
         /// Test that the default configuration parallel options max degrees of parallelism matches the
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void TestDefaultConfigurationMaxDegreeOfParallelism()
         {
-            Assert.True(Configuration.Default.MaxDegreeOfParallelism == Environment.ProcessorCount);
+            Assert.True(this.DefaultConfiguration.MaxDegreeOfParallelism == Environment.ProcessorCount);
 
             var cfg = new Configuration();
             Assert.True(cfg.MaxDegreeOfParallelism == Environment.ProcessorCount);
@@ -93,7 +93,7 @@ namespace SixLabors.ImageSharp.Tests
         public void ConfigurationCannotAddDuplicates()
         {
             const int count = 4;
-            Configuration config = Configuration.Default;
+            Configuration config = this.DefaultConfiguration;
 
             Assert.Equal(count, config.ImageFormats.Count());
 
@@ -105,9 +105,16 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void DefaultConfigurationHasCorrectFormatCount()
         {
-            Configuration config = Configuration.Default;
+            Configuration config = Configuration.CreateDefaultInstance();
 
             Assert.Equal(4, config.ImageFormats.Count());
         }
+
+        [Fact]
+        public void WorkingBufferSizeHint_DefaultIsCorrect()
+        {
+            Configuration config = this.DefaultConfiguration;
+            Assert.True(config.WorkingBufferSizeHintInBytes  > 1024);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 3d6f08a152..ec0092f340 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -35,6 +35,25 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
+        [Theory]
+        [InlineData(20, 100, 1, 2)]
+        [InlineData(20, 100, 20*100*16, 2)]
+        [InlineData(20, 100, 40*100*16, 2)]
+        [InlineData(20, 100, 59*100*16, 2)]
+        [InlineData(20, 100, 60*100*16, 3)]
+        [InlineData(17, 63, 5*17*63*16, 5)]
+        [InlineData(17, 63, 5*17*63*16+1, 5)]
+        [InlineData(17, 63, 6*17*63*16-1, 5)]
+        public void CalculateResizeWorkerWindowCount(
+            int windowDiameter,
+            int width,
+            int sizeLimitHintInBytes,
+            int expectedCount)
+        {
+            int actualCount = ResizeHelper.CalculateResizeWorkerWindowCount(windowDiameter, width, sizeLimitHintInBytes);
+            Assert.Equal(expectedCount, actualCount);
+        }
+        
         [Theory]
         [InlineData(-2, 0)]
         [InlineData(-1, 0)]

From 2859fdd772d3128b3e4de2e651367499f6babd92 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 15:02:58 +0200
Subject: [PATCH 069/223] utilize CalculateResizeWorkerHeightInWindowBands()
 which has been renamed from CalculateResizeWorkerWindowCount()

---
 src/ImageSharp/Configuration.cs                   | 14 +++++++-------
 .../Processors/Transforms/Resize/ResizeHelper.cs  |  6 +++---
 .../Processors/Transforms/Resize/ResizeWorker.cs  | 15 ++++++++++-----
 .../Processors/Transforms/ResizeKernelMapTests.cs |  1 +
 .../Processors/Transforms/ResizeTests.cs          |  7 +++++--
 5 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/src/ImageSharp/Configuration.cs b/src/ImageSharp/Configuration.cs
index b1767101d4..7cb014563d 100644
--- a/src/ImageSharp/Configuration.cs
+++ b/src/ImageSharp/Configuration.cs
@@ -128,9 +128,9 @@ namespace SixLabors.ImageSharp
         }
 
         /// <summary>
-        /// Creates a shallow copy of the <see cref="Configuration"/>
+        /// Creates a shallow copy of the <see cref="Configuration"/>.
         /// </summary>
-        /// <returns>A new configuration instance</returns>
+        /// <returns>A new configuration instance.</returns>
         public Configuration Clone()
         {
             return new Configuration
@@ -147,12 +147,12 @@ namespace SixLabors.ImageSharp
 
         /// <summary>
         /// Creates the default instance with the following <see cref="IConfigurationModule"/>s preregistered:
-        /// <para><see cref="PngConfigurationModule"/></para>
-        /// <para><see cref="JpegConfigurationModule"/></para>
-        /// <para><see cref="GifConfigurationModule"/></para>
-        /// <para><see cref="BmpConfigurationModule"/></para>
+        /// <see cref="PngConfigurationModule"/>
+        /// <see cref="JpegConfigurationModule"/>
+        /// <see cref="GifConfigurationModule"/>
+        /// <see cref="BmpConfigurationModule"/>.
         /// </summary>
-        /// <returns>The default configuration of <see cref="Configuration"/></returns>
+        /// <returns>The default configuration of <see cref="Configuration"/>.</returns>
         internal static Configuration CreateDefaultInstance()
         {
             return new Configuration(
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
index 0bc8cfda02..595a7e852e 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
@@ -15,13 +15,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// </summary>
     internal static class ResizeHelper
     {
-        public static unsafe int CalculateResizeWorkerWindowCount(
-            int windowDiameter,
+        public static unsafe int CalculateResizeWorkerHeightInWindowBands(
+            int windowBandDiameter,
             int width,
             int sizeLimitHintInBytes)
         {
             int sizeLimitHint = sizeLimitHintInBytes / sizeof(Vector4);
-            int sizeOfOneWindow = windowDiameter * width;
+            int sizeOfOneWindow = windowBandDiameter * width;
             return Math.Max(2, sizeLimitHint / sizeOfOneWindow);
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 11b49b8631..73dcce58b6 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly Rectangle destWorkingRect;
 
-        private readonly int diameter;
+        private readonly int windowBandDiameter;
 
         private readonly int windowHeight;
 
@@ -65,9 +65,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.destWorkingRect = destWorkingRect;
             this.startX = startX;
 
-            this.diameter = verticalKernelMap.MaxDiameter;
+            this.windowBandDiameter = verticalKernelMap.MaxDiameter;
 
-            this.windowHeight = Math.Min(this.sourceRectangle.Height, 2 * this.diameter);
+            int numberOfWindowBands = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(
+                this.windowBandDiameter,
+                destWidth,
+                configuration.WorkingBufferSizeHintInBytes);
+
+            this.windowHeight = Math.Min(this.sourceRectangle.Height, numberOfWindowBands * this.windowBandDiameter);
 
             this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
                 this.windowHeight,
@@ -143,8 +148,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         public void Slide()
         {
-            this.CurrentMinY = this.CurrentMinY + this.diameter;
-            this.CurrentMaxY = Math.Min(this.CurrentMaxY + this.diameter, this.sourceRectangle.Height);
+            this.CurrentMinY = this.CurrentMinY + this.windowBandDiameter;
+            this.CurrentMaxY = Math.Min(this.CurrentMaxY + this.windowBandDiameter, this.sourceRectangle.Height);
             this.CalculateFirstPassValues(this.CurrentMinY, this.CurrentMaxY);
         }
 
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
index 1bd909e7ea..51680eee04 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeKernelMapTests.cs
@@ -36,6 +36,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             { nameof(KnownResamplers.Bicubic), 40, 50 },
             { nameof(KnownResamplers.Bicubic), 500, 200 },
             { nameof(KnownResamplers.Bicubic), 200, 500 },
+            { nameof(KnownResamplers.Bicubic), 3032, 400 },
 
             { nameof(KnownResamplers.Bicubic), 10, 25 },
 
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index ec0092f340..5325581662 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -44,13 +44,16 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         [InlineData(17, 63, 5*17*63*16, 5)]
         [InlineData(17, 63, 5*17*63*16+1, 5)]
         [InlineData(17, 63, 6*17*63*16-1, 5)]
-        public void CalculateResizeWorkerWindowCount(
+        [InlineData(33, 400, 1*1024*1024, 4)]
+        [InlineData(33, 400, 8*1024*1024, 39)]
+        [InlineData(50, 300, 1*1024*1024, 4)]
+        public void CalculateResizeWorkerHeightInWindowBands(
             int windowDiameter,
             int width,
             int sizeLimitHintInBytes,
             int expectedCount)
         {
-            int actualCount = ResizeHelper.CalculateResizeWorkerWindowCount(windowDiameter, width, sizeLimitHintInBytes);
+            int actualCount = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(windowDiameter, width, sizeLimitHintInBytes);
             Assert.Equal(expectedCount, actualCount);
         }
         

From 7f0a245b6ac6241c0d404bcf336bc12970ef3c30 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 16:23:01 +0200
Subject: [PATCH 070/223] improve benchmark: ArrayCopy -> CopyBuffers

---
 .../Transforms/Resize/ResizeKernel.cs         |   4 +-
 .../Transforms/Resize/ResizeWorker.cs         |   7 +-
 .../General/ArrayCopy.cs                      | 103 ----------
 .../General/CopyBuffers.cs                    | 184 ++++++++++++++++++
 4 files changed, 191 insertions(+), 107 deletions(-)
 delete mode 100644 tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
 create mode 100644 tests/ImageSharp.Benchmarks/General/CopyBuffers.cs

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
index 4606f482cd..71cba90564 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
@@ -62,13 +62,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         public Vector4 ConvolveCore(Span<Vector4> offsetedRowSpan)
         {
             ref float horizontalValues = ref Unsafe.AsRef<float>(this.bufferPtr);
+
             // Destination color components
             Vector4 result = Vector4.Zero;
 
             for (int i = 0; i < this.Length; i++)
             {
                 float weight = Unsafe.Add(ref horizontalValues, i);
-                //Vector4 v = Unsafe.Add(ref rowStartRef, i);
+
+                // Vector4 v = Unsafe.Add(ref rowStartRef, i);
                 Vector4 v = offsetedRowSpan[i];
                 result += v * weight;
             }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 73dcce58b6..e9e39ef13b 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -142,7 +142,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 Span<TPixel> targetRowSpan = destination.GetRowSpan(y);
 
-                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempColSpan, targetRowSpan, conversionModifiers);
+                PixelOperations<TPixel>.Instance.FromVector4Destructive(this.configuration, tempColSpan, targetRowSpan, this.conversionModifiers);
             }
         }
 
@@ -166,14 +166,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     tempRowSpan,
                     this.conversionModifiers);
 
-                //ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
+                // ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
                 Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - minY);
 
                 for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
                 {
                     ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
                     firstPassSpan[x * this.windowHeight] = kernel.Convolve(tempRowSpan);
-                    //Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
+
+                    // Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
                 }
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs b/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
deleted file mode 100644
index ac6b3f93c7..0000000000
--- a/tests/ImageSharp.Benchmarks/General/ArrayCopy.cs
+++ /dev/null
@@ -1,103 +0,0 @@
-// <copyright file="ArrayCopy.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-namespace SixLabors.ImageSharp.Benchmarks.General
-{
-    using System;
-    using System.Runtime.CompilerServices;
-    using System.Runtime.InteropServices;
-
-    using BenchmarkDotNet.Attributes;
-    
-    [Config(typeof(Config.ShortClr))]
-    public class ArrayCopy
-    {
-        [Params(10, 100, 1000, 10000)]
-        public int Count { get; set; }
-
-        byte[] source;
-
-        byte[] destination;
-
-        [GlobalSetup]
-        public void SetUp()
-        {
-            this.source = new byte[this.Count];
-            this.destination = new byte[this.Count];
-        }
-
-        [Benchmark(Baseline = true, Description = "Copy using Array.Copy()")]
-        public void CopyArray()
-        {
-            Array.Copy(this.source, this.destination, this.Count);
-        }
-
-        [Benchmark(Description = "Copy using Unsafe<T>")]
-        public unsafe void CopyUnsafe()
-        {
-            fixed (byte* pinnedDestination = this.destination)
-            fixed (byte* pinnedSource = this.source)
-            {
-                Unsafe.CopyBlock(pinnedSource, pinnedDestination, (uint)this.Count);
-            }
-        }
-
-        [Benchmark(Description = "Copy using Buffer.BlockCopy()")]
-        public void CopyUsingBufferBlockCopy()
-        {
-            Buffer.BlockCopy(this.source, 0, this.destination, 0, this.Count);
-        }
-
-        [Benchmark(Description = "Copy using Buffer.MemoryCopy<T>")]
-        public unsafe void CopyUsingBufferMemoryCopy()
-        {
-            fixed (byte* pinnedDestination = this.destination)
-            fixed (byte* pinnedSource = this.source)
-            {
-                Buffer.MemoryCopy(pinnedSource, pinnedDestination, this.Count, this.Count);
-            }
-        }
-        
-        [Benchmark(Description = "Copy using Marshal.Copy<T>")]
-        public unsafe void CopyUsingMarshalCopy()
-        {
-            fixed (byte* pinnedDestination = this.destination)
-            {
-                Marshal.Copy(this.source, 0, (IntPtr)pinnedDestination, this.Count);
-            }
-        }
-
-        /*****************************************************************************************************************
-         *************** RESULTS on i7-4810MQ 2.80GHz + Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1085.0 ********************
-         *****************************************************************************************************************
-         * 
-         *                             Method | Count |        Mean |     StdErr |     StdDev | Scaled | Scaled-StdDev |
-         * ---------------------------------- |------ |------------ |----------- |----------- |------- |-------------- |
-         *          'Copy using Array.Copy()' |    10 |  20.3074 ns |  0.1194 ns |  0.2068 ns |   1.00 |          0.00 |
-         *             'Copy using Unsafe<T>' |    10 |   6.1002 ns |  0.1981 ns |  0.3432 ns |   0.30 |          0.01 |
-         *    'Copy using Buffer.BlockCopy()' |    10 |  10.7879 ns |  0.0984 ns |  0.1705 ns |   0.53 |          0.01 |
-         *  'Copy using Buffer.MemoryCopy<T>' |    10 |   4.9625 ns |  0.0200 ns |  0.0347 ns |   0.24 |          0.00 |
-         *       'Copy using Marshal.Copy<T>' |    10 |  16.1782 ns |  0.0919 ns |  0.1592 ns |   0.80 |          0.01 |
-         *       
-         *          'Copy using Array.Copy()' |   100 |  31.5945 ns |  0.2908 ns |  0.5037 ns |   1.00 |          0.00 |
-         *             'Copy using Unsafe<T>' |   100 |  10.2722 ns |  0.5202 ns |  0.9010 ns |   0.33 |          0.02 |
-         *    'Copy using Buffer.BlockCopy()' |   100 |  22.0322 ns |  0.0284 ns |  0.0493 ns |   0.70 |          0.01 |
-         *  'Copy using Buffer.MemoryCopy<T>' |   100 |  10.2472 ns |  0.0359 ns |  0.0622 ns |   0.32 |          0.00 |
-         *       'Copy using Marshal.Copy<T>' |   100 |  34.3820 ns |  1.1868 ns |  2.0555 ns |   1.09 |          0.05 |
-         *       
-         *          'Copy using Array.Copy()' |  1000 |  40.9743 ns |  0.0521 ns |  0.0902 ns |   1.00 |          0.00 |
-         *             'Copy using Unsafe<T>' |  1000 |  42.7840 ns |  2.0139 ns |  3.4882 ns |   1.04 |          0.07 |
-         *    'Copy using Buffer.BlockCopy()' |  1000 |  33.7361 ns |  0.0751 ns |  0.1300 ns |   0.82 |          0.00 |
-         *  'Copy using Buffer.MemoryCopy<T>' |  1000 |  35.7541 ns |  0.0480 ns |  0.0832 ns |   0.87 |          0.00 |
-         *       'Copy using Marshal.Copy<T>' |  1000 |  42.2028 ns |  0.2769 ns |  0.4795 ns |   1.03 |          0.01 |
-         *       
-         *          'Copy using Array.Copy()' | 10000 | 200.0438 ns |  0.2251 ns |  0.3899 ns |   1.00 |          0.00 |
-         *             'Copy using Unsafe<T>' | 10000 | 389.6957 ns | 13.2770 ns | 22.9964 ns |   1.95 |          0.09 |
-         *    'Copy using Buffer.BlockCopy()' | 10000 | 191.3478 ns |  0.1557 ns |  0.2697 ns |   0.96 |          0.00 |
-         *  'Copy using Buffer.MemoryCopy<T>' | 10000 | 196.4679 ns |  0.2731 ns |  0.4730 ns |   0.98 |          0.00 |
-         *       'Copy using Marshal.Copy<T>' | 10000 | 202.5392 ns |  0.5561 ns |  0.9631 ns |   1.01 |          0.00 |
-         * 
-         */
-    }
-}
diff --git a/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
new file mode 100644
index 0000000000..117cdba418
--- /dev/null
+++ b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
@@ -0,0 +1,184 @@
+// <copyright file="ArrayCopy.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+using System;
+using System.Buffers;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using BenchmarkDotNet.Attributes;
+
+namespace SixLabors.ImageSharp.Benchmarks.General
+{
+    /// <summary>
+    /// Compare different methods for copying native and/or managed buffers.
+    /// Conclusions:
+    /// - Span.CopyTo() has terrible performance on classic .NET Framework
+    /// - Buffer.MemoryCopy() performance is good enough for all sizes (but needs pinning)
+    /// </summary>
+    [Config(typeof(Config.ShortClr))]
+    public class CopyBuffers
+    {
+        private byte[] destArray;
+
+        private MemoryHandle destHandle;
+
+        private Memory<byte> destMemory;
+
+        private byte[] sourceArray;
+
+        private MemoryHandle sourceHandle;
+
+        private Memory<byte> sourceMemory;
+
+        [Params(10, 50, 100, 1000, 10000)]
+        public int Count { get; set; }
+        
+        
+        [GlobalSetup]
+        public void Setup()
+        {
+            this.sourceArray = new byte[this.Count];
+            this.sourceMemory = new Memory<byte>(this.sourceArray);
+            this.sourceHandle = this.sourceMemory.Pin();
+
+            this.destArray = new byte[this.Count];
+            this.destMemory = new Memory<byte>(this.destArray);
+            this.destHandle = this.destMemory.Pin();
+        }
+
+        [GlobalCleanup]
+        public void Cleanup()
+        {
+            this.sourceHandle.Dispose();
+            this.destHandle.Dispose();
+        }
+
+        [Benchmark(Baseline = true, Description = "Array.Copy()")]
+        public void ArrayCopy()
+        {
+            Array.Copy(this.sourceArray, this.destArray, this.Count);
+        }
+
+        [Benchmark(Description = "Buffer.BlockCopy()")]
+        public void BufferBlockCopy()
+        {
+            Buffer.BlockCopy(this.sourceArray, 0, this.destArray, 0, this.Count);
+        }
+
+        [Benchmark(Description = "Buffer.MemoryCopy()")]
+        public unsafe void BufferMemoryCopy()
+        {
+            void* pinnedDestination = this.destHandle.Pointer;
+            void* pinnedSource = this.sourceHandle.Pointer;
+            Buffer.MemoryCopy(pinnedSource, pinnedDestination, this.Count, this.Count);
+        }
+
+
+        [Benchmark(Description = "Marshal.Copy()")]
+        public unsafe void MarshalCopy()
+        {
+            void* pinnedDestination = this.destHandle.Pointer;
+            Marshal.Copy(this.sourceArray, 0, (IntPtr)pinnedDestination, this.Count);
+        }
+
+        [Benchmark(Description = "Span.CopyTo()")]
+        public void SpanCopyTo()
+        {
+            this.sourceMemory.Span.CopyTo(this.destMemory.Span);
+        }
+
+        [Benchmark(Description = "Unsafe.CopyBlock()")]
+        public unsafe void UnsafeCopyBlock()
+        {
+            void* pinnedDestination = this.destHandle.Pointer;
+            void* pinnedSource = this.sourceHandle.Pointer;
+            Unsafe.CopyBlock(pinnedSource, pinnedDestination, (uint)this.Count);
+        }
+        
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.706 (1803/April2018Update/Redstone4)
+        // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
+        // Frequency=2742189 Hz, Resolution=364.6722 ns, Timer=TSC
+        // .NET Core SDK=2.2.202
+        //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3394.0
+        //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        // 
+        // IterationCount=3  LaunchCount=1  WarmupCount=3  
+        // 
+        //               Method |  Job | Runtime | Count |       Mean |      Error |    StdDev | Ratio | RatioSD | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // -------------------- |----- |-------- |------ |-----------:|-----------:|----------:|------:|--------:|------------:|------------:|------------:|--------------------:|
+        //         Array.Copy() |  Clr |     Clr |    10 |  23.579 ns |  1.6836 ns | 0.0923 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() |  Clr |     Clr |    10 |  11.796 ns |  0.5280 ns | 0.0289 ns |  0.50 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() |  Clr |     Clr |    10 |   3.206 ns |  8.1741 ns | 0.4480 ns |  0.14 |    0.02 |           - |           - |           - |                   - |
+        //       Marshal.Copy() |  Clr |     Clr |    10 |  15.577 ns |  2.0937 ns | 0.1148 ns |  0.66 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() |  Clr |     Clr |    10 |  32.287 ns |  2.4107 ns | 0.1321 ns |  1.37 |    0.01 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() |  Clr |     Clr |    10 |   3.266 ns |  0.3848 ns | 0.0211 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() | Core |    Core |    10 |  19.713 ns |  7.3026 ns | 0.4003 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() | Core |    Core |    10 |   7.332 ns |  0.5465 ns | 0.0300 ns |  0.37 |    0.01 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() | Core |    Core |    10 |   2.476 ns |  0.3476 ns | 0.0191 ns |  0.13 |    0.00 |           - |           - |           - |                   - |
+        //       Marshal.Copy() | Core |    Core |    10 |  15.575 ns |  0.1335 ns | 0.0073 ns |  0.79 |    0.02 |           - |           - |           - |                   - |
+        //        Span.CopyTo() | Core |    Core |    10 |  25.321 ns |  2.3556 ns | 0.1291 ns |  1.28 |    0.02 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() | Core |    Core |    10 |   2.204 ns |  0.1836 ns | 0.0101 ns |  0.11 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() |  Clr |     Clr |    50 |  35.217 ns |  2.7642 ns | 0.1515 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() |  Clr |     Clr |    50 |  24.224 ns |  0.8737 ns | 0.0479 ns |  0.69 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() |  Clr |     Clr |    50 |   3.827 ns |  4.8733 ns | 0.2671 ns |  0.11 |    0.01 |           - |           - |           - |                   - |
+        //       Marshal.Copy() |  Clr |     Clr |    50 |  28.103 ns |  1.3570 ns | 0.0744 ns |  0.80 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() |  Clr |     Clr |    50 |  34.137 ns |  2.9274 ns | 0.1605 ns |  0.97 |    0.01 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() |  Clr |     Clr |    50 |   4.999 ns |  0.1778 ns | 0.0097 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() | Core |    Core |    50 |  20.925 ns |  1.0219 ns | 0.0560 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() | Core |    Core |    50 |   8.083 ns |  0.2158 ns | 0.0118 ns |  0.39 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() | Core |    Core |    50 |   2.919 ns |  0.2878 ns | 0.0158 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
+        //       Marshal.Copy() | Core |    Core |    50 |  16.663 ns |  0.2505 ns | 0.0137 ns |  0.80 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() | Core |    Core |    50 |  26.940 ns | 11.5855 ns | 0.6350 ns |  1.29 |    0.03 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() | Core |    Core |    50 |   1.940 ns |  0.6327 ns | 0.0347 ns |  0.09 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() |  Clr |     Clr |   100 |  39.284 ns |  0.5647 ns | 0.0310 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() |  Clr |     Clr |   100 |  28.930 ns |  0.6774 ns | 0.0371 ns |  0.74 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() |  Clr |     Clr |   100 |   5.859 ns |  2.7931 ns | 0.1531 ns |  0.15 |    0.00 |           - |           - |           - |                   - |
+        //       Marshal.Copy() |  Clr |     Clr |   100 |  36.529 ns |  0.9886 ns | 0.0542 ns |  0.93 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() |  Clr |     Clr |   100 |  36.152 ns |  1.5109 ns | 0.0828 ns |  0.92 |    0.00 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() |  Clr |     Clr |   100 |   9.317 ns |  0.4342 ns | 0.0238 ns |  0.24 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() | Core |    Core |   100 |  22.899 ns |  8.4066 ns | 0.4608 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() | Core |    Core |   100 |  10.696 ns |  0.8106 ns | 0.0444 ns |  0.47 |    0.01 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() | Core |    Core |   100 |   4.102 ns |  0.9040 ns | 0.0496 ns |  0.18 |    0.01 |           - |           - |           - |                   - |
+        //       Marshal.Copy() | Core |    Core |   100 |  17.917 ns |  2.6490 ns | 0.1452 ns |  0.78 |    0.01 |           - |           - |           - |                   - |
+        //        Span.CopyTo() | Core |    Core |   100 |  28.247 ns |  0.6375 ns | 0.0349 ns |  1.23 |    0.03 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() | Core |    Core |   100 |   3.611 ns |  0.4792 ns | 0.0263 ns |  0.16 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() |  Clr |     Clr |  1000 |  48.907 ns |  4.4228 ns | 0.2424 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() |  Clr |     Clr |  1000 |  40.653 ns |  1.4055 ns | 0.0770 ns |  0.83 |    0.01 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() |  Clr |     Clr |  1000 |  24.720 ns |  1.2651 ns | 0.0693 ns |  0.51 |    0.00 |           - |           - |           - |                   - |
+        //       Marshal.Copy() |  Clr |     Clr |  1000 |  42.336 ns |  2.2466 ns | 0.1231 ns |  0.87 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() |  Clr |     Clr |  1000 |  70.735 ns |  2.6215 ns | 0.1437 ns |  1.45 |    0.01 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() |  Clr |     Clr |  1000 |  44.520 ns |  0.9641 ns | 0.0528 ns |  0.91 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() | Core |    Core |  1000 |  46.286 ns | 11.6373 ns | 0.6379 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() | Core |    Core |  1000 |  34.243 ns |  7.2264 ns | 0.3961 ns |  0.74 |    0.01 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() | Core |    Core |  1000 |  23.135 ns |  0.3153 ns | 0.0173 ns |  0.50 |    0.01 |           - |           - |           - |                   - |
+        //       Marshal.Copy() | Core |    Core |  1000 |  46.219 ns |  1.2869 ns | 0.0705 ns |  1.00 |    0.01 |           - |           - |           - |                   - |
+        //        Span.CopyTo() | Core |    Core |  1000 |  45.371 ns |  3.3581 ns | 0.1841 ns |  0.98 |    0.02 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() | Core |    Core |  1000 |  29.347 ns |  1.1349 ns | 0.0622 ns |  0.63 |    0.01 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() |  Clr |     Clr | 10000 | 218.445 ns |  9.2567 ns | 0.5074 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() |  Clr |     Clr | 10000 | 209.610 ns |  6.7447 ns | 0.3697 ns |  0.96 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() |  Clr |     Clr | 10000 | 213.061 ns | 66.6490 ns | 3.6533 ns |  0.98 |    0.02 |           - |           - |           - |                   - |
+        //       Marshal.Copy() |  Clr |     Clr | 10000 | 214.426 ns | 27.7722 ns | 1.5223 ns |  0.98 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() |  Clr |     Clr | 10000 | 486.728 ns | 12.1537 ns | 0.6662 ns |  2.23 |    0.00 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() |  Clr |     Clr | 10000 | 452.973 ns | 25.1490 ns | 1.3785 ns |  2.07 |    0.00 |           - |           - |           - |                   - |
+        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
+        //         Array.Copy() | Core |    Core | 10000 | 203.365 ns |  3.2200 ns | 0.1765 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
+        //   Buffer.BlockCopy() | Core |    Core | 10000 | 193.319 ns |  8.3370 ns | 0.4570 ns |  0.95 |    0.00 |           - |           - |           - |                   - |
+        //  Buffer.MemoryCopy() | Core |    Core | 10000 | 196.541 ns | 37.8056 ns | 2.0723 ns |  0.97 |    0.01 |           - |           - |           - |                   - |
+        //       Marshal.Copy() | Core |    Core | 10000 | 206.454 ns |  3.7652 ns | 0.2064 ns |  1.02 |    0.00 |           - |           - |           - |                   - |
+        //        Span.CopyTo() | Core |    Core | 10000 | 214.799 ns |  3.0667 ns | 0.1681 ns |  1.06 |    0.00 |           - |           - |           - |                   - |
+        //   Unsafe.CopyBlock() | Core |    Core | 10000 | 134.428 ns |  2.6024 ns | 0.1426 ns |  0.66 |    0.00 |           - |           - |           - |                   - |
+
+    }
+}
\ No newline at end of file

From 398736a09bc4764415a4f52bc3f3b6ba5f1867ee Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 16:47:01 +0200
Subject: [PATCH 071/223] moar RowInterval stuff

---
 src/ImageSharp/Memory/RowInterval.cs          | 37 +++++++++++++-
 .../Transforms/Resize/ResizeWorker.cs         | 43 ++++++++--------
 .../Helpers/RowIntervalTests.cs               | 49 +++++++++++++++++++
 3 files changed, 106 insertions(+), 23 deletions(-)

diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 835e880e94..7e144e37c5 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Memory
@@ -8,7 +10,7 @@ namespace SixLabors.ImageSharp.Memory
     /// <summary>
     /// Represents an interval of rows in a <see cref="Rectangle"/> and/or <see cref="Buffer2D{T}"/>
     /// </summary>
-    internal readonly struct RowInterval
+    internal readonly struct RowInterval : IEquatable<RowInterval>
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="RowInterval"/> struct.
@@ -36,7 +38,40 @@ namespace SixLabors.ImageSharp.Memory
         /// </summary>
         public int Height => this.Max - this.Min;
 
+
+        public static bool operator ==(RowInterval left, RowInterval right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(RowInterval left, RowInterval right)
+        {
+            return !left.Equals(right);
+        }
+
         /// <inheritdoc />
         public override string ToString() => $"RowInterval [{this.Min}->{this.Max}]";
+
+        public RowInterval Slice(int start) => new RowInterval(this.Min + start, this.Max);
+
+        public RowInterval Slice(int start, int length) => new RowInterval(this.Min + start, this.Min + start + length);
+
+        public bool Equals(RowInterval other)
+        {
+            return this.Min == other.Min && this.Max == other.Max;
+        }
+
+        public override bool Equals(object obj)
+        {
+            return !ReferenceEquals(null, obj) && obj is RowInterval other && this.Equals(other);
+        }
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return (this.Min * 397) ^ this.Max;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index e9e39ef13b..66a17e2d76 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -45,6 +45,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly int windowHeight;
 
+        private RowInterval currentWindow;
+
         public ResizeWorker(
             Configuration configuration,
             BufferArea<TPixel> source,
@@ -82,14 +84,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
             this.tempColumnBuffer = configuration.MemoryAllocator.Allocate<Vector4>(destWidth);
 
-            this.CurrentMinY = 0;
-            this.CurrentMaxY = this.windowHeight;
+            this.currentWindow = new RowInterval(0, this.windowHeight);
         }
 
-        public int CurrentMaxY { get; private set; }
-
-        public int CurrentMinY { get; private set; }
-
         public void Dispose()
         {
             this.buffer.Dispose();
@@ -100,18 +97,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public Span<Vector4> GetColumnSpan(int x, int startY)
         {
-            return this.buffer.GetRowSpan(x).Slice(startY - this.CurrentMinY);
+            return this.buffer.GetRowSpan(x).Slice(startY - this.currentWindow.Min);
         }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Span<Vector4> GetColumnSpan(int x)
-        {
-            return this.buffer.GetRowSpan(x);
-        }
 
         public void Initialize()
         {
-            this.CalculateFirstPassValues(0, this.windowHeight);
+            this.CalculateFirstPassValues(this.currentWindow);
         }
 
         public void FillDestinationPixels(int minY, int maxY, int startY, Buffer2D<TPixel> destination)
@@ -123,14 +115,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 // Ensure offsets are normalized for cropping and padding.
                 ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
 
-                while (kernel.StartIndex + kernel.Length > this.CurrentMaxY)
+                while (kernel.StartIndex + kernel.Length > this.currentWindow.Max)
                 {
                     this.Slide();
                 }
 
                 ref Vector4 tempRowBase = ref MemoryMarshal.GetReference(tempColSpan);
 
-                int top = kernel.StartIndex - this.CurrentMinY;
+                int top = kernel.StartIndex - this.currentWindow.Min;
 
                 for (int x = 0; x < this.destWidth; x++)
                 {
@@ -146,17 +138,24 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             }
         }
 
-        public void Slide()
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private Span<Vector4> GetColumnSpan(int x)
+        {
+            return this.buffer.GetRowSpan(x);
+        }
+
+        private void Slide()
         {
-            this.CurrentMinY = this.CurrentMinY + this.windowBandDiameter;
-            this.CurrentMaxY = Math.Min(this.CurrentMaxY + this.windowBandDiameter, this.sourceRectangle.Height);
-            this.CalculateFirstPassValues(this.CurrentMinY, this.CurrentMaxY);
+            int minY = this.currentWindow.Min + this.windowBandDiameter;
+            int maxY = Math.Min(this.currentWindow.Max + this.windowBandDiameter, this.sourceRectangle.Height);
+            this.currentWindow = new RowInterval(minY, maxY);
+            this.CalculateFirstPassValues(this.currentWindow);
         }
 
-        private void CalculateFirstPassValues(int minY, int maxY)
+        private void CalculateFirstPassValues(RowInterval window)
         {
             Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
-            for (int y = minY; y < maxY; y++)
+            for (int y = window.Min; y < window.Max; y++)
             {
                 Span<TPixel> sourceRow = this.source.GetRowSpan(y);
 
@@ -167,7 +166,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     this.conversionModifiers);
 
                 // ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
-                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - minY);
+                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - window.Min);
 
                 for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
                 {
diff --git a/tests/ImageSharp.Tests/Helpers/RowIntervalTests.cs b/tests/ImageSharp.Tests/Helpers/RowIntervalTests.cs
index 629b3cdeb3..3aead6aaa9 100644
--- a/tests/ImageSharp.Tests/Helpers/RowIntervalTests.cs
+++ b/tests/ImageSharp.Tests/Helpers/RowIntervalTests.cs
@@ -34,5 +34,54 @@ namespace SixLabors.ImageSharp.Tests.Helpers
                 Assert.True(Unsafe.AreSame(ref expected0, ref actual0));
             }
         }
+
+        [Fact]
+        public void Slice1()
+        {
+            RowInterval rowInterval = new RowInterval(10, 20);
+            RowInterval sliced = rowInterval.Slice(5);
+            
+            Assert.Equal(15, sliced.Min);
+            Assert.Equal(20, sliced.Max);
+        }
+
+        [Fact]
+        public void Slice2()
+        {
+            RowInterval rowInterval = new RowInterval(10, 20);
+            RowInterval sliced = rowInterval.Slice(3, 5);
+            
+            Assert.Equal(13, sliced.Min);
+            Assert.Equal(18, sliced.Max);
+        }
+
+        [Fact]
+        public void Equality_WhenTrue()
+        {
+            RowInterval a = new RowInterval(42, 123);
+            RowInterval b = new RowInterval(42, 123);
+            
+            Assert.True(a.Equals(b));
+            Assert.True(a.Equals((object)b));
+            Assert.True(a == b);
+            Assert.Equal(a.GetHashCode(), b.GetHashCode());
+        }
+
+        [Fact]
+        public void Equality_WhenFalse()
+        {
+            RowInterval a = new RowInterval(42, 123);
+            RowInterval b = new RowInterval(42, 125);
+            RowInterval c = new RowInterval(40, 123);
+            
+            Assert.False(a.Equals(b));
+            Assert.False(c.Equals(a));
+            Assert.False(b.Equals(c));
+            
+            Assert.False(a.Equals((object)b));
+            Assert.False(a.Equals(null));
+            Assert.False(a == b);
+            Assert.True(a != c);
+        }
     }
 }

From ae22e017c55a27b64c2380660a7a456a6da9bac1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 17:27:01 +0200
Subject: [PATCH 072/223] buffer.CopyColumns(...)

---
 src/ImageSharp/Memory/Buffer2DExtensions.cs   | 144 +++++++++++-------
 .../ImageSharp.Tests/Memory/Buffer2DTests.cs  |  28 ++++
 .../TestUtilities/TestDataGenerator.cs        |  13 +-
 3 files changed, 130 insertions(+), 55 deletions(-)

diff --git a/src/ImageSharp/Memory/Buffer2DExtensions.cs b/src/ImageSharp/Memory/Buffer2DExtensions.cs
index 17ab6e2522..c8bbf01c7f 100644
--- a/src/ImageSharp/Memory/Buffer2DExtensions.cs
+++ b/src/ImageSharp/Memory/Buffer2DExtensions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.Runtime.CompilerServices;
 
 using SixLabors.Primitives;
@@ -14,41 +15,90 @@ namespace SixLabors.ImageSharp.Memory
     internal static class Buffer2DExtensions
     {
         /// <summary>
-        /// Gets a <see cref="Span{T}"/> to the backing buffer of <paramref name="buffer"/>.
+        /// Copy <paramref name="columnCount"/> columns of <paramref name="buffer"/> inplace,
+        /// from positions starting at <paramref name="sourceIndex"/> to positions at <paramref name="destIndex"/>.
         /// </summary>
-        internal static Span<T> GetSpan<T>(this Buffer2D<T> buffer)
+        public static unsafe void CopyColumns<T>(
+            this Buffer2D<T> buffer,
+            int sourceIndex,
+            int destIndex,
+            int columnCount)
             where T : struct
         {
-            return buffer.MemorySource.GetSpan();
+            DebugGuard.NotNull(buffer, nameof(buffer));
+            DebugGuard.MustBeGreaterThanOrEqualTo(sourceIndex, 0, nameof(sourceIndex));
+            DebugGuard.MustBeGreaterThanOrEqualTo(destIndex, sourceIndex + columnCount, nameof(destIndex));
+            DebugGuard.MustBeLessThanOrEqualTo(destIndex, buffer.Width - columnCount, nameof(destIndex));
+
+            int elementSize = Unsafe.SizeOf<T>();
+            int width = buffer.Width * elementSize;
+            int sOffset = sourceIndex * elementSize;
+            int dOffset = destIndex * elementSize;
+            long count = columnCount * elementSize;
+
+            using (MemoryHandle handle = buffer.Memory.Pin())
+            {
+                byte* basePtr = (byte*)handle.Pointer;
+                for (int y = 0; y < buffer.Height; y++)
+                {
+                    byte* sPtr = basePtr + sOffset;
+                    byte* dPtr = basePtr + dOffset;
+
+                    Buffer.MemoryCopy(sPtr, dPtr, count, count);
+
+                    basePtr += width;
+                }
+            }
         }
 
         /// <summary>
-        /// Gets a <see cref="Span{T}"/> to the row 'y' beginning from the pixel at 'x'.
+        /// Returns a <see cref="Rectangle"/> representing the full area of the buffer.
         /// </summary>
-        /// <param name="buffer">The buffer</param>
-        /// <param name="x">The x coordinate (position in the row)</param>
-        /// <param name="y">The y (row) coordinate</param>
         /// <typeparam name="T">The element type</typeparam>
-        /// <returns>The <see cref="Span{T}"/></returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Span<T> GetRowSpan<T>(this Buffer2D<T> buffer, int x, int y)
+        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
+        /// <returns>The <see cref="Rectangle"/></returns>
+        public static Rectangle FullRectangle<T>(this Buffer2D<T> buffer)
             where T : struct
         {
-            return buffer.GetSpan().Slice((y * buffer.Width) + x, buffer.Width - x);
+            return new Rectangle(0, 0, buffer.Width, buffer.Height);
         }
 
         /// <summary>
-        /// Gets a <see cref="Span{T}"/> to the row 'y' beginning from the pixel at the first pixel on that row.
+        /// Return a <see cref="BufferArea{T}"/> to the subarea represented by 'rectangle'
         /// </summary>
-        /// <param name="buffer">The buffer</param>
-        /// <param name="y">The y (row) coordinate</param>
         /// <typeparam name="T">The element type</typeparam>
-        /// <returns>The <see cref="Span{T}"/></returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Span<T> GetRowSpan<T>(this Buffer2D<T> buffer, int y)
+        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
+        /// <param name="rectangle">The rectangle subarea</param>
+        /// <returns>The <see cref="BufferArea{T}"/></returns>
+        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer, in Rectangle rectangle)
+            where T : struct =>
+            new BufferArea<T>(buffer, rectangle);
+
+        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer, int x, int y, int width, int height)
+            where T : struct =>
+            new BufferArea<T>(buffer, new Rectangle(x, y, width, height));
+
+        /// <summary>
+        /// Return a <see cref="BufferArea{T}"/> to the whole area of 'buffer'
+        /// </summary>
+        /// <typeparam name="T">The element type</typeparam>
+        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
+        /// <returns>The <see cref="BufferArea{T}"/></returns>
+        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer)
+            where T : struct =>
+            new BufferArea<T>(buffer);
+
+        public static BufferArea<T> GetAreaBetweenRows<T>(this Buffer2D<T> buffer, int minY, int maxY)
+            where T : struct =>
+            new BufferArea<T>(buffer, new Rectangle(0, minY, buffer.Width, maxY - minY));
+
+        /// <summary>
+        /// Gets a span for all the pixels in <paramref name="buffer"/> defined by <paramref name="rows"/>
+        /// </summary>
+        public static Span<T> GetMultiRowSpan<T>(this Buffer2D<T> buffer, in RowInterval rows)
             where T : struct
         {
-            return buffer.GetSpan().Slice(y * buffer.Width, buffer.Width);
+            return buffer.Span.Slice(rows.Min * buffer.Width, rows.Height * buffer.Width);
         }
 
         /// <summary>
@@ -66,61 +116,53 @@ namespace SixLabors.ImageSharp.Memory
         }
 
         /// <summary>
-        /// Returns the size of the buffer.
+        /// Gets a <see cref="Span{T}"/> to the row 'y' beginning from the pixel at 'x'.
         /// </summary>
+        /// <param name="buffer">The buffer</param>
+        /// <param name="x">The x coordinate (position in the row)</param>
+        /// <param name="y">The y (row) coordinate</param>
         /// <typeparam name="T">The element type</typeparam>
-        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
-        /// <returns>The <see cref="Size{T}"/> of the buffer</returns>
-        public static Size Size<T>(this Buffer2D<T> buffer)
+        /// <returns>The <see cref="Span{T}"/></returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Span<T> GetRowSpan<T>(this Buffer2D<T> buffer, int x, int y)
             where T : struct
         {
-            return new Size(buffer.Width, buffer.Height);
+            return buffer.GetSpan().Slice((y * buffer.Width) + x, buffer.Width - x);
         }
 
         /// <summary>
-        /// Returns a <see cref="Rectangle"/> representing the full area of the buffer.
+        /// Gets a <see cref="Span{T}"/> to the row 'y' beginning from the pixel at the first pixel on that row.
         /// </summary>
+        /// <param name="buffer">The buffer</param>
+        /// <param name="y">The y (row) coordinate</param>
         /// <typeparam name="T">The element type</typeparam>
-        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
-        /// <returns>The <see cref="Rectangle"/></returns>
-        public static Rectangle FullRectangle<T>(this Buffer2D<T> buffer)
+        /// <returns>The <see cref="Span{T}"/></returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Span<T> GetRowSpan<T>(this Buffer2D<T> buffer, int y)
             where T : struct
         {
-            return new Rectangle(0, 0, buffer.Width, buffer.Height);
+            return buffer.GetSpan().Slice(y * buffer.Width, buffer.Width);
         }
 
         /// <summary>
-        /// Return a <see cref="BufferArea{T}"/> to the subarea represented by 'rectangle'
-        /// </summary>
-        /// <typeparam name="T">The element type</typeparam>
-        /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
-        /// <param name="rectangle">The rectangle subarea</param>
-        /// <returns>The <see cref="BufferArea{T}"/></returns>
-        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer, in Rectangle rectangle)
-            where T : struct => new BufferArea<T>(buffer, rectangle);
-
-        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer, int x, int y, int width, int height)
-            where T : struct => new BufferArea<T>(buffer, new Rectangle(x, y, width, height));
-
-        public static BufferArea<T> GetAreaBetweenRows<T>(this Buffer2D<T> buffer, int minY, int maxY)
-            where T : struct => new BufferArea<T>(buffer, new Rectangle(0, minY, buffer.Width, maxY - minY));
-
-        /// <summary>
-        /// Return a <see cref="BufferArea{T}"/> to the whole area of 'buffer'
+        /// Returns the size of the buffer.
         /// </summary>
         /// <typeparam name="T">The element type</typeparam>
         /// <param name="buffer">The <see cref="Buffer2D{T}"/></param>
-        /// <returns>The <see cref="BufferArea{T}"/></returns>
-        public static BufferArea<T> GetArea<T>(this Buffer2D<T> buffer)
-            where T : struct => new BufferArea<T>(buffer);
+        /// <returns>The <see cref="Size{T}"/> of the buffer</returns>
+        public static Size Size<T>(this Buffer2D<T> buffer)
+            where T : struct
+        {
+            return new Size(buffer.Width, buffer.Height);
+        }
 
         /// <summary>
-        /// Gets a span for all the pixels in <paramref name="buffer"/> defined by <paramref name="rows"/>
+        /// Gets a <see cref="Span{T}"/> to the backing buffer of <paramref name="buffer"/>.
         /// </summary>
-        public static Span<T> GetMultiRowSpan<T>(this Buffer2D<T> buffer, in RowInterval rows)
+        internal static Span<T> GetSpan<T>(this Buffer2D<T> buffer)
             where T : struct
         {
-            return buffer.Span.Slice(rows.Min * buffer.Width, rows.Height * buffer.Width);
+            return buffer.MemorySource.GetSpan();
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs b/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
index 19ec725f27..3d40875461 100644
--- a/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
+++ b/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
@@ -127,5 +127,33 @@ namespace SixLabors.ImageSharp.Tests.Memory
                 Assert.Equal(new Size(10, 5), b.Size());
             }
         }
+
+        [Theory]
+        [InlineData(100, 20, 0, 90, 10)]
+        [InlineData(100, 3, 0, 50, 50)]
+        [InlineData(123, 23, 10, 80, 13)]
+        [InlineData(10, 1, 3, 6, 3)]
+        [InlineData(2, 2, 0, 1, 1)]
+        [InlineData(5, 1, 1, 3, 2)]
+        public void CopyColumns(int width, int height, int startIndex, int destIndex, int columnCount)
+        {
+            Random rnd = new Random(123);
+            using (Buffer2D<float> b = this.MemoryAllocator.Allocate2D<float>(width, height))
+            {
+                rnd.RandomFill(b.Span, 0, 1);
+                
+                b.CopyColumns(startIndex, destIndex, columnCount);
+
+                for (int y = 0; y < b.Height; y++)
+                {
+                    Span<float> row = b.GetRowSpan(y);
+
+                    Span<float> s = row.Slice(startIndex, columnCount);
+                    Span<float> d = row.Slice(destIndex, columnCount);
+                    
+                    Xunit.Assert.True(s.SequenceEqual(d));
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestDataGenerator.cs b/tests/ImageSharp.Tests/TestUtilities/TestDataGenerator.cs
index e3d8bf3806..4ccb387451 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestDataGenerator.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestDataGenerator.cs
@@ -23,14 +23,19 @@ namespace SixLabors.ImageSharp.Tests
         {
             float[] values = new float[length];
 
-            for (int i = 0; i < length; i++)
-            {
-                values[i] = GetRandomFloat(rnd, minVal, maxVal);
-            }
+            RandomFill(rnd, values, minVal, maxVal);
 
             return values;
         }
 
+        public static void RandomFill(this Random rnd, Span<float> destination, float minVal, float maxVal)
+        {
+            for (int i = 0; i < destination.Length; i++)
+            {
+                destination[i] = GetRandomFloat(rnd, minVal, maxVal);
+            }
+        }
+
         /// <summary>
         /// Creates an <see cref="Vector4[]"/> of the given length consisting of random values between the two ranges.
         /// </summary>

From c86551021a6b869f50e90a76b3a5ca2d9b858c4b Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 17:47:35 +0200
Subject: [PATCH 073/223] simplify ResizeWorker logic

---
 src/ImageSharp/Memory/RowInterval.cs          |  1 -
 .../Transforms/Resize/ResizeProcessor.cs      | 18 +++++----
 .../Transforms/Resize/ResizeWorker.cs         | 37 +++++++++----------
 3 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 7e144e37c5..3ee7ae774d 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -38,7 +38,6 @@ namespace SixLabors.ImageSharp.Memory
         /// </summary>
         public int Height => this.Max - this.Min;
 
-
         public static bool operator ==(RowInterval left, RowInterval right)
         {
             return left.Equals(right);
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 63dd5efca0..e75f6014ab 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -197,7 +197,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int startY = this.TargetRectangle.Y;
             int startX = this.TargetRectangle.X;
 
-            var destWorkingRect = Rectangle.Intersect(
+            var targetWorkingRect = Rectangle.Intersect(
                 this.TargetRectangle,
                 new Rectangle(0, 0, width, height));
 
@@ -208,7 +208,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
 
                 ParallelHelper.IterateRows(
-                    destWorkingRect,
+                    targetWorkingRect,
                     configuration,
                     rows =>
                     {
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                 source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
                             Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
 
-                            for (int x = destWorkingRect.Left; x < destWorkingRect.Right; x++)
+                            for (int x = targetWorkingRect.Left; x < targetWorkingRect.Right; x++)
                             {
                                 // X coordinates of source points
                                 targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
@@ -237,8 +237,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
             BufferArea<TPixel> sourceArea = source.PixelBuffer.GetArea(sourceRectangle);
 
-            // If we want to reintroduce processing:
-            // it's possible to launch multiple workers for different regions of the image
+            // To reintroduce parallel processing, we to launch multiple workers
+            // for different row intervals of the image.
             using (var worker = new ResizeWorker<TPixel>(
                 configuration,
                 sourceArea,
@@ -246,11 +246,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 this.horizontalKernelMap,
                 this.verticalKernelMap,
                 width,
-                destWorkingRect,
-                startX))
+                targetWorkingRect,
+                this.TargetRectangle.Location))
             {
                 worker.Initialize();
-                worker.FillDestinationPixels(destWorkingRect.Top, destWorkingRect.Bottom, startY, destination.PixelBuffer);
+
+                var workingInterval = new RowInterval(targetWorkingRect.Top, targetWorkingRect.Bottom);
+                worker.FillDestinationPixels(workingInterval, destination.PixelBuffer);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 66a17e2d76..339e8a3b2c 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     internal class ResizeWorker<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly Buffer2D<Vector4> buffer;
+        private readonly Buffer2D<Vector4> transposedFirstPassBuffer;
 
         private readonly Configuration configuration;
 
@@ -29,8 +29,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly Rectangle sourceRectangle;
 
-        private readonly int startX;
-
         private readonly IMemoryOwner<Vector4> tempRowBuffer;
 
         private readonly IMemoryOwner<Vector4> tempColumnBuffer;
@@ -39,7 +37,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly int destWidth;
 
-        private readonly Rectangle destWorkingRect;
+        private readonly Rectangle targetWorkingRect;
+
+        private readonly Point targetOrigin;
 
         private readonly int windowBandDiameter;
 
@@ -54,8 +54,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             ResizeKernelMap horizontalKernelMap,
             ResizeKernelMap verticalKernelMap,
             int destWidth,
-            Rectangle destWorkingRect,
-            int startX)
+            Rectangle targetWorkingRect,
+            Point targetOrigin)
         {
             this.configuration = configuration;
             this.source = source;
@@ -64,8 +64,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.horizontalKernelMap = horizontalKernelMap;
             this.verticalKernelMap = verticalKernelMap;
             this.destWidth = destWidth;
-            this.destWorkingRect = destWorkingRect;
-            this.startX = startX;
+            this.targetWorkingRect = targetWorkingRect;
+            this.targetOrigin = targetOrigin;
 
             this.windowBandDiameter = verticalKernelMap.MaxDiameter;
 
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
             this.windowHeight = Math.Min(this.sourceRectangle.Height, numberOfWindowBands * this.windowBandDiameter);
 
-            this.buffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
+            this.transposedFirstPassBuffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
                 this.windowHeight,
                 destWidth,
                 AllocationOptions.Clean);
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         public void Dispose()
         {
-            this.buffer.Dispose();
+            this.transposedFirstPassBuffer.Dispose();
             this.tempRowBuffer.Dispose();
             this.tempColumnBuffer.Dispose();
         }
@@ -97,23 +97,22 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public Span<Vector4> GetColumnSpan(int x, int startY)
         {
-            return this.buffer.GetRowSpan(x).Slice(startY - this.currentWindow.Min);
+            return this.transposedFirstPassBuffer.GetRowSpan(x).Slice(startY - this.currentWindow.Min);
         }
 
-
         public void Initialize()
         {
             this.CalculateFirstPassValues(this.currentWindow);
         }
 
-        public void FillDestinationPixels(int minY, int maxY, int startY, Buffer2D<TPixel> destination)
+        public void FillDestinationPixels(RowInterval rowInterval, Buffer2D<TPixel> destination)
         {
             Span<Vector4> tempColSpan = this.tempColumnBuffer.GetSpan();
 
-            for (int y = minY; y < maxY; y++)
+            for (int y = rowInterval.Min; y < rowInterval.Max; y++)
             {
                 // Ensure offsets are normalized for cropping and padding.
-                ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - startY);
+                ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - this.targetOrigin.Y);
 
                 while (kernel.StartIndex + kernel.Length > this.currentWindow.Max)
                 {
@@ -141,7 +140,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private Span<Vector4> GetColumnSpan(int x)
         {
-            return this.buffer.GetRowSpan(x);
+            return this.transposedFirstPassBuffer.GetRowSpan(x);
         }
 
         private void Slide()
@@ -166,11 +165,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     this.conversionModifiers);
 
                 // ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
-                Span<Vector4> firstPassSpan = this.buffer.Span.Slice(y - window.Min);
+                Span<Vector4> firstPassSpan = this.transposedFirstPassBuffer.Span.Slice(y - window.Min);
 
-                for (int x = this.destWorkingRect.Left; x < this.destWorkingRect.Right; x++)
+                for (int x = this.targetWorkingRect.Left; x < this.targetWorkingRect.Right; x++)
                 {
-                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.startX);
+                    ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.targetOrigin.X);
                     firstPassSpan[x * this.windowHeight] = kernel.Convolve(tempRowSpan);
 
                     // Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);

From bd8c06ad12025f1dec87b92118405ba9544b73b1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 21:00:39 +0200
Subject: [PATCH 074/223] WorkingBufferSizeHintInBytes_IsAppliedCorrectly

---
 .../Transforms/Resize/ResizeHelper.cs         |   4 +-
 .../Transforms/Resize/ResizeWorker.cs         |  20 +-
 .../Processors/Transforms/ResamplerTests.cs   |  69 +++
 .../Transforms/ResizeHelperTests.cs           |  35 ++
 .../Processors/Transforms/ResizeTests.cs      | 143 +++---
 .../BasicTestPatternProvider.cs               |   2 +-
 .../ImageProviders/BlankProvider.cs           |   2 +-
 .../ImageProviders/FileProvider.cs            |   2 +-
 .../ImageProviders/TestImageProvider.cs       |   2 +-
 .../ImageProviders/TestPatternProvider.cs     |   3 +-
 .../TestUtilities/TestMemoryAllocator.cs      |  39 +-
 .../Tests/TestImageProviderTests.cs           | 458 ++++++++++--------
 tests/Images/External                         |   2 +-
 13 files changed, 474 insertions(+), 307 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Transforms/ResamplerTests.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
index 595a7e852e..956e6b84e7 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
@@ -16,12 +16,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     internal static class ResizeHelper
     {
         public static unsafe int CalculateResizeWorkerHeightInWindowBands(
-            int windowBandDiameter,
+            int windowBandHeight,
             int width,
             int sizeLimitHintInBytes)
         {
             int sizeLimitHint = sizeLimitHintInBytes / sizeof(Vector4);
-            int sizeOfOneWindow = windowBandDiameter * width;
+            int sizeOfOneWindow = windowBandHeight * width;
             return Math.Max(2, sizeLimitHint / sizeOfOneWindow);
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 339e8a3b2c..ce28a00ee7 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -41,9 +41,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly Point targetOrigin;
 
-        private readonly int windowBandDiameter;
+        private readonly int windowBandHeight;
 
-        private readonly int windowHeight;
+        private readonly int workerHeight;
 
         private RowInterval currentWindow;
 
@@ -67,24 +67,24 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.targetWorkingRect = targetWorkingRect;
             this.targetOrigin = targetOrigin;
 
-            this.windowBandDiameter = verticalKernelMap.MaxDiameter;
+            this.windowBandHeight = verticalKernelMap.MaxDiameter;
 
             int numberOfWindowBands = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(
-                this.windowBandDiameter,
+                this.windowBandHeight,
                 destWidth,
                 configuration.WorkingBufferSizeHintInBytes);
 
-            this.windowHeight = Math.Min(this.sourceRectangle.Height, numberOfWindowBands * this.windowBandDiameter);
+            this.workerHeight = Math.Min(this.sourceRectangle.Height, numberOfWindowBands * this.windowBandHeight);
 
             this.transposedFirstPassBuffer = configuration.MemoryAllocator.Allocate2D<Vector4>(
-                this.windowHeight,
+                this.workerHeight,
                 destWidth,
                 AllocationOptions.Clean);
 
             this.tempRowBuffer = configuration.MemoryAllocator.Allocate<Vector4>(this.sourceRectangle.Width);
             this.tempColumnBuffer = configuration.MemoryAllocator.Allocate<Vector4>(destWidth);
 
-            this.currentWindow = new RowInterval(0, this.windowHeight);
+            this.currentWindow = new RowInterval(0, this.workerHeight);
         }
 
         public void Dispose()
@@ -145,8 +145,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private void Slide()
         {
-            int minY = this.currentWindow.Min + this.windowBandDiameter;
-            int maxY = Math.Min(this.currentWindow.Max + this.windowBandDiameter, this.sourceRectangle.Height);
+            int minY = this.currentWindow.Min + this.windowBandHeight;
+            int maxY = Math.Min(this.currentWindow.Max + this.windowBandHeight, this.sourceRectangle.Height);
             this.currentWindow = new RowInterval(minY, maxY);
             this.CalculateFirstPassValues(this.currentWindow);
         }
@@ -170,7 +170,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 for (int x = this.targetWorkingRect.Left; x < this.targetWorkingRect.Right; x++)
                 {
                     ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.targetOrigin.X);
-                    firstPassSpan[x * this.windowHeight] = kernel.Convolve(tempRowSpan);
+                    firstPassSpan[x * this.workerHeight] = kernel.Convolve(tempRowSpan);
 
                     // Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
                 }
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResamplerTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResamplerTests.cs
new file mode 100644
index 0000000000..b7b4597c79
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResamplerTests.cs
@@ -0,0 +1,69 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Transforms;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
+{
+    public class ResamplerTests
+    {   
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void BicubicWindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Bicubic;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void Lanczos3WindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Lanczos3;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-4, 0)]
+        [InlineData(-2, 0)]
+        [InlineData(0, 1)]
+        [InlineData(2, 0)]
+        [InlineData(4, 0)]
+        public static void Lanczos5WindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Lanczos5;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+
+        [Theory]
+        [InlineData(-2, 0)]
+        [InlineData(-1, 0)]
+        [InlineData(0, 1)]
+        [InlineData(1, 0)]
+        [InlineData(2, 0)]
+        public static void TriangleWindowOscillatesCorrectly(float x, float expected)
+        {
+            IResampler sampler = KnownResamplers.Triangle;
+            float result = sampler.GetValue(x);
+
+            Assert.Equal(result, expected);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs
new file mode 100644
index 0000000000..b0d8ef6531
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs
@@ -0,0 +1,35 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Processing.Processors.Transforms;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
+{
+    public class ResizeHelperTests
+    {
+        
+        [Theory]
+        [InlineData(20, 100, 1, 2)]
+        [InlineData(20, 100, 20*100*16, 2)]
+        [InlineData(20, 100, 40*100*16, 2)]
+        [InlineData(20, 100, 59*100*16, 2)]
+        [InlineData(20, 100, 60*100*16, 3)]
+        [InlineData(17, 63, 5*17*63*16, 5)]
+        [InlineData(17, 63, 5*17*63*16+1, 5)]
+        [InlineData(17, 63, 6*17*63*16-1, 5)]
+        [InlineData(33, 400, 1*1024*1024, 4)]
+        [InlineData(33, 400, 8*1024*1024, 39)]
+        [InlineData(50, 300, 1*1024*1024, 4)]
+        public void CalculateResizeWorkerHeightInWindowBands(
+            int windowDiameter,
+            int width,
+            int sizeLimitHintInBytes,
+            int expectedCount)
+        {
+            int actualCount = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(windowDiameter, width, sizeLimitHintInBytes);
+            Assert.Equal(expectedCount, actualCount);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 5325581662..2ffb42916f 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -2,12 +2,17 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Linq;
+using System.Numerics;
+using System.Runtime.CompilerServices;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
+using SixLabors.ImageSharp.Tests.Memory;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Memory;
 using SixLabors.Primitives;
 
 using Xunit;
@@ -35,84 +40,6 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
-        [Theory]
-        [InlineData(20, 100, 1, 2)]
-        [InlineData(20, 100, 20*100*16, 2)]
-        [InlineData(20, 100, 40*100*16, 2)]
-        [InlineData(20, 100, 59*100*16, 2)]
-        [InlineData(20, 100, 60*100*16, 3)]
-        [InlineData(17, 63, 5*17*63*16, 5)]
-        [InlineData(17, 63, 5*17*63*16+1, 5)]
-        [InlineData(17, 63, 6*17*63*16-1, 5)]
-        [InlineData(33, 400, 1*1024*1024, 4)]
-        [InlineData(33, 400, 8*1024*1024, 39)]
-        [InlineData(50, 300, 1*1024*1024, 4)]
-        public void CalculateResizeWorkerHeightInWindowBands(
-            int windowDiameter,
-            int width,
-            int sizeLimitHintInBytes,
-            int expectedCount)
-        {
-            int actualCount = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(windowDiameter, width, sizeLimitHintInBytes);
-            Assert.Equal(expectedCount, actualCount);
-        }
-        
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void BicubicWindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Bicubic;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void Lanczos3WindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Lanczos3;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-4, 0)]
-        [InlineData(-2, 0)]
-        [InlineData(0, 1)]
-        [InlineData(2, 0)]
-        [InlineData(4, 0)]
-        public static void Lanczos5WindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Lanczos5;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
-        [Theory]
-        [InlineData(-2, 0)]
-        [InlineData(-1, 0)]
-        [InlineData(0, 1)]
-        [InlineData(1, 0)]
-        [InlineData(2, 0)]
-        public static void TriangleWindowOscillatesCorrectly(float x, float expected)
-        {
-            IResampler sampler = KnownResamplers.Triangle;
-            float result = sampler.GetValue(x);
-
-            Assert.Equal(result, expected);
-        }
-
         [Theory]
         [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)]
         [WithBasicTestPatternImages(2, 256, PixelTypes.Rgba32, 1, 1, 1, 8)]
@@ -136,6 +63,66 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             }
         }
 
+        private static readonly int SizeOfVector4 = Unsafe.SizeOf<Vector4>();
+
+        [Theory]
+        [WithTestPatternImages(100, 100, PixelTypes.Rgba32, 50)]
+        [WithTestPatternImages(100, 100, PixelTypes.Rgba32, 60)]
+        [WithTestPatternImages(100, 400, PixelTypes.Rgba32, 110)]
+        [WithTestPatternImages(79, 97, PixelTypes.Rgba32, 73)]
+        [WithTestPatternImages(79, 97, PixelTypes.Rgba32, 5)]
+        [WithTestPatternImages(47, 193, PixelTypes.Rgba32, 73)]
+        [WithTestPatternImages(23, 211, PixelTypes.Rgba32, 31)]
+        public void WorkingBufferSizeHintInBytes_IsAppliedCorrectly<TPixel>(
+            TestImageProvider<TPixel> provider,
+            int workingBufferLimitInRows)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image0 = provider.GetImage())
+            {
+                Size destSize = image0.Size() / 4;
+                
+                Configuration configuration = Configuration.CreateDefaultInstance();
+                
+                int workingBufferSizeHintInBytes = workingBufferLimitInRows * destSize.Width * SizeOfVector4;
+                TestMemoryAllocator allocator = new TestMemoryAllocator();
+                configuration.MemoryAllocator = allocator;
+                configuration.WorkingBufferSizeHintInBytes = workingBufferSizeHintInBytes;
+
+                var verticalKernelMap = ResizeKernelMap.Calculate(
+                    KnownResamplers.Bicubic,
+                    destSize.Height,
+                    image0.Height,
+                    Configuration.Default.MemoryAllocator);
+                int minimumWorkerAllocationInBytes =  verticalKernelMap.MaxDiameter * 2 * destSize.Width * SizeOfVector4;
+                verticalKernelMap.Dispose();
+                
+                using (Image<TPixel> image = image0.Clone(configuration))
+                {
+                    image.Mutate(x => x.Resize(destSize, KnownResamplers.Bicubic, false));
+
+                    image.DebugSave(
+                        provider,
+                        testOutputDetails: workingBufferLimitInRows,
+                        appendPixelTypeToFileName: false);
+                    image.CompareToReferenceOutput(
+                        provider,
+                        testOutputDetails: workingBufferLimitInRows,
+                        appendPixelTypeToFileName: false);
+                    
+                    Assert.NotEmpty(allocator.AllocationLog);
+
+                    var internalAllocations = allocator.AllocationLog.Where(
+                        e => e.ElementType == typeof(Vector4)).ToArray();
+                    
+                    int maxAllocationSize = internalAllocations.Max(e => e.LengthInBytes);
+                    
+                    
+                    Assert.True(maxAllocationSize <= Math.Max(workingBufferSizeHintInBytes, minimumWorkerAllocationInBytes));
+                }
+            }
+        }
+
         [Theory]
         [WithTestPatternImages(100, 100, DefaultPixelType)]
         public void Resize_Compand<TPixel>(TestImageProvider<TPixel> provider)
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
index 47bb22aeb3..de203535c6 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.Tests
 
             public override Image<TPixel> GetImage()
             {
-                var result = new Image<TPixel>(this.Width, this.Height);
+                var result = new Image<TPixel>(this.Configuration, this.Width, this.Height);
 
                 TPixel topLeftColor = NamedColors<TPixel>.Red;
                 TPixel topRightColor = NamedColors<TPixel>.Green;
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
index 1275e522f8..dae2f0cfe4 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BlankProvider.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Tests
 
             protected int Width { get; private set; }
 
-            public override Image<TPixel> GetImage() => new Image<TPixel>(this.Width, this.Height);
+            public override Image<TPixel> GetImage() => new Image<TPixel>(this.Configuration, this.Width, this.Height);
 
 
             public override void Deserialize(IXunitSerializationInfo info)
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/FileProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/FileProvider.cs
index 3ed696c472..8c5b88b280 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/FileProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/FileProvider.cs
@@ -152,7 +152,7 @@ namespace SixLabors.ImageSharp.Tests
 
                 Image<TPixel> cachedImage = cache.GetOrAdd(key, _ => this.LoadImage(decoder));
 
-                return cachedImage.Clone();
+                return cachedImage.Clone(this.Configuration);
             }
 
             public override void Deserialize(IXunitSerializationInfo info)
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
index 52f66a78b5..15fab9b2bf 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
@@ -106,7 +106,7 @@ namespace SixLabors.ImageSharp.Tests
         /// </summary>
         public Image<TPixel> GetImage(Action<IImageProcessingContext<TPixel>> operationsToApply)
         {
-            Image<TPixel> img = GetImage();
+            Image<TPixel> img = this.GetImage();
             img.Mutate(operationsToApply);
             return img;
         }
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
index 336cdbf11f..6df8c85016 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
@@ -45,9 +45,8 @@ namespace SixLabors.ImageSharp.Tests
                         DrawTestPattern(image);
                         TestImages.Add(this.SourceFileOrDescription, image);
                     }
+                    return TestImages[this.SourceFileOrDescription].Clone(this.Configuration);
                 }
-
-                return TestImages[this.SourceFileOrDescription].Clone();
             }
 
             /// <summary>
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestMemoryAllocator.cs b/tests/ImageSharp.Tests/TestUtilities/TestMemoryAllocator.cs
index dc755e6827..5613e7b684 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestMemoryAllocator.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestMemoryAllocator.cs
@@ -1,5 +1,7 @@
 using System;
 using System.Buffers;
+using System.Collections.Generic;
+using System.Numerics;
 using System.Runtime.InteropServices;
 
 using SixLabors.Memory;
@@ -8,6 +10,8 @@ namespace SixLabors.ImageSharp.Tests.Memory
 {
     internal class TestMemoryAllocator : MemoryAllocator
     {
+        private List<AllocationRequest> allocationLog = new List<AllocationRequest>();
+        
         public TestMemoryAllocator(byte dirtyValue = 42)
         {
             this.DirtyValue = dirtyValue;
@@ -18,10 +22,11 @@ namespace SixLabors.ImageSharp.Tests.Memory
         /// </summary>
         public byte DirtyValue { get; }
 
+        public IList<AllocationRequest> AllocationLog => this.allocationLog;
+
         public override IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
-        {
+        {   
             T[] array = this.AllocateArray<T>(length, options);
-
             return new BasicArrayBuffer<T>(array, length);
         }
 
@@ -34,6 +39,7 @@ namespace SixLabors.ImageSharp.Tests.Memory
         private T[] AllocateArray<T>(int length, AllocationOptions options)
             where T : struct
         {
+            this.allocationLog.Add(AllocationRequest.Create<T>(options, length));
             var array = new T[length + 42];
 
             if (options == AllocationOptions.None)
@@ -44,6 +50,35 @@ namespace SixLabors.ImageSharp.Tests.Memory
 
             return array;
         }
+        
+        public struct AllocationRequest
+        {
+            private AllocationRequest(Type elementType, AllocationOptions allocationOptions, int length, int lengthInBytes)
+            {
+                this.ElementType = elementType;
+                this.AllocationOptions = allocationOptions;
+                this.Length = length;
+                this.LengthInBytes = lengthInBytes;
+
+                if (elementType == typeof(Vector4))
+                {
+                    
+                }
+            }
+
+            public static AllocationRequest Create<T>(AllocationOptions allocationOptions, int length)
+            {
+                Type type = typeof(T);
+                int elementSize = Marshal.SizeOf(type);
+                return new AllocationRequest(type, allocationOptions, length, length * elementSize);
+            }
+
+            public Type ElementType { get; }
+            public AllocationOptions AllocationOptions { get; }
+            public int Length { get; }
+            public int LengthInBytes { get; }
+        }
+
 
         /// <summary>
         /// Wraps an array as an <see cref="IManagedByteBuffer"/> instance.
diff --git a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
index 1bee34f1a7..4ef6a582c9 100644
--- a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
@@ -4,112 +4,135 @@
 using System;
 using System.Collections.Concurrent;
 using System.IO;
+
+using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
+
 using Xunit;
 using Xunit.Abstractions;
+
 // ReSharper disable InconsistentNaming
 
 namespace SixLabors.ImageSharp.Tests
 {
     public class TestImageProviderTests
     {
+        public static readonly TheoryData<object> BasicData = new TheoryData<object>()
+                                                                  {
+                                                                      TestImageProvider<Rgba32>.Blank(10, 20),
+                                                                      TestImageProvider<HalfVector4>.Blank(10, 20),
+                                                                  };
+
+        public static readonly TheoryData<object> FileData = new TheoryData<object>()
+                                                                 {
+                                                                     TestImageProvider<Rgba32>.File(TestImages.Bmp.Car),
+                                                                     TestImageProvider<HalfVector4>.File(
+                                                                         TestImages.Bmp.F)
+                                                                 };
+
+        public static string[] AllBmpFiles = { TestImages.Bmp.F, TestImages.Bmp.Bit8 };
+
         public TestImageProviderTests(ITestOutputHelper output) => this.Output = output;
 
         private ITestOutputHelper Output { get; }
 
-        [Theory]
-        [WithBlankImages(1, 1, PixelTypes.Rgba32)]
-        public void NoOutputSubfolderIsPresentByDefault<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel> => Assert.Empty(provider.Utility.OutputSubfolderName);
+        /// <summary>
+        /// Need to us <see cref="GenericFactory{TPixel}"/> to create instance of <see cref="Image"/> when pixelType is StandardImageClass
+        /// </summary>
+        /// <typeparam name="TPixel"></typeparam>
+        /// <param name="factory"></param>
+        /// <returns></returns>
+        public static Image<TPixel> CreateTestImage<TPixel>()
+            where TPixel : struct, IPixel<TPixel> =>
+            new Image<TPixel>(3, 3);
 
         [Theory]
-        [WithBlankImages(42, 666, PixelTypes.Rgba32 | PixelTypes.Argb32 | PixelTypes.HalfSingle, "hello")]
-        public void Use_WithEmptyImageAttribute<TPixel>(TestImageProvider<TPixel> provider, string message)
+        [MemberData(nameof(BasicData))]
+        public void Blank_MemberData<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             Image<TPixel> img = provider.GetImage();
 
-            Assert.Equal(42, img.Width);
-            Assert.Equal(666, img.Height);
-            Assert.Equal("hello", message);
+            Assert.True(img.Width * img.Height > 0);
         }
 
         [Theory]
-        [WithBlankImages(42, 666, PixelTypes.All, "hello")]
-        public void Use_WithBlankImagesAttribute_WithAllPixelTypes<TPixel>(
-            TestImageProvider<TPixel> provider,
-            string message)
+        [MemberData(nameof(FileData))]
+        public void File_MemberData<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            this.Output.WriteLine("SRC: " + provider.Utility.SourceFileOrDescription);
+            this.Output.WriteLine("OUT: " + provider.Utility.GetTestOutputFileName());
+
             Image<TPixel> img = provider.GetImage();
 
-            Assert.Equal(42, img.Width);
-            Assert.Equal(666, img.Height);
-            Assert.Equal("hello", message);
+            Assert.True(img.Width * img.Height > 0);
         }
 
         [Theory]
-        [WithBlankImages(1, 1, PixelTypes.Rgba32, PixelTypes.Rgba32)]
-        [WithBlankImages(1, 1, PixelTypes.Alpha8, PixelTypes.Alpha8)]
-        [WithBlankImages(1, 1, PixelTypes.Argb32, PixelTypes.Argb32)]
-        public void PixelType_PropertyValueIsCorrect<TPixel>(TestImageProvider<TPixel> provider, PixelTypes expected)
-            where TPixel : struct, IPixel<TPixel> => Assert.Equal(expected, provider.PixelType);
-
-        [Theory]
-        [WithFile(TestImages.Bmp.Car, PixelTypes.All, 88)]
-        [WithFile(TestImages.Bmp.F, PixelTypes.All, 88)]
-        public void Use_WithFileAttribute<TPixel>(TestImageProvider<TPixel> provider, int yo)
+        [WithFile(TestImages.Bmp.F, PixelTypes.Rgba32)]
+        public void GetImage_WithCustomParameterlessDecoder_ShouldUtilizeCache<TPixel>(
+            TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (!TestEnvironment.Is64BitProcess)
+            {
+                // We don't cache with the 32 bit build.
+                return;
+            }
+
             Assert.NotNull(provider.Utility.SourceFileOrDescription);
-            Image<TPixel> img = provider.GetImage();
-            Assert.True(img.Width * img.Height > 0);
 
-            Assert.Equal(88, yo);
+            TestDecoder.DoTestThreadSafe(
+                () =>
+                    {
+                        string testName = nameof(this.GetImage_WithCustomParameterlessDecoder_ShouldUtilizeCache);
 
-            string fn = provider.Utility.GetTestOutputFileName("jpg");
-            this.Output.WriteLine(fn);
-        }
+                        var decoder = new TestDecoder();
+                        decoder.InitCaller(testName);
 
-        private class TestDecoder : IImageDecoder
-        {
-            public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                invocationCounts[this.callerName]++;
-                return new Image<TPixel>(42, 42);
-            }
+                        provider.GetImage(decoder);
+                        Assert.Equal(1, TestDecoder.GetInvocationCount(testName));
 
-            // Couldn't make xUnit happy without this hackery:
+                        provider.GetImage(decoder);
+                        Assert.Equal(1, TestDecoder.GetInvocationCount(testName));
+                    });
+        }
 
-            private static readonly ConcurrentDictionary<string, int> invocationCounts = new ConcurrentDictionary<string, int>();
+        [Theory]
+        [WithFile(TestImages.Bmp.F, PixelTypes.Rgba32)]
+        public void GetImage_WithCustomParametricDecoder_ShouldNotUtilizeCache_WhenParametersAreNotEqual<TPixel>(
+            TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Assert.NotNull(provider.Utility.SourceFileOrDescription);
 
-            private string callerName = null;
+            TestDecoderWithParameters.DoTestThreadSafe(
+                () =>
+                    {
+                        string testName = nameof(this
+                            .GetImage_WithCustomParametricDecoder_ShouldNotUtilizeCache_WhenParametersAreNotEqual);
 
-            internal void InitCaller(string name)
-            {
-                this.callerName = name;
-                invocationCounts[name] = 0;
-            }
+                        var decoder1 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 42 };
+                        decoder1.InitCaller(testName);
 
-            internal static int GetInvocationCount(string callerName) => invocationCounts[callerName];
+                        var decoder2 = new TestDecoderWithParameters() { Param1 = "LoL", Param2 = 42 };
+                        decoder2.InitCaller(testName);
 
-            private static readonly object Monitor = new object();
+                        provider.GetImage(decoder1);
+                        Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
 
-            public static void DoTestThreadSafe(Action action)
-            {
-                lock (Monitor)
-                {
-                    action();
-                }
-            }
+                        provider.GetImage(decoder2);
+                        Assert.Equal(2, TestDecoderWithParameters.GetInvocationCount(testName));
+                    });
         }
 
         [Theory]
         [WithFile(TestImages.Bmp.F, PixelTypes.Rgba32)]
-        public void GetImage_WithCustomParameterlessDecoder_ShouldUtilizeCache<TPixel>(TestImageProvider<TPixel> provider)
+        public void GetImage_WithCustomParametricDecoder_ShouldUtilizeCache_WhenParametersAreEqual<TPixel>(
+            TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             if (!TestEnvironment.Is64BitProcess)
@@ -120,121 +143,122 @@ namespace SixLabors.ImageSharp.Tests
 
             Assert.NotNull(provider.Utility.SourceFileOrDescription);
 
-            TestDecoder.DoTestThreadSafe(() =>
-            {
-                string testName = nameof(this.GetImage_WithCustomParameterlessDecoder_ShouldUtilizeCache);
-
-                var decoder = new TestDecoder();
-                decoder.InitCaller(testName);
-
-                provider.GetImage(decoder);
-                Assert.Equal(1, TestDecoder.GetInvocationCount(testName));
+            TestDecoderWithParameters.DoTestThreadSafe(
+                () =>
+                    {
+                        string testName = nameof(this
+                            .GetImage_WithCustomParametricDecoder_ShouldUtilizeCache_WhenParametersAreEqual);
 
-                provider.GetImage(decoder);
-                Assert.Equal(1, TestDecoder.GetInvocationCount(testName));
-            });
-        }
+                        var decoder1 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 666 };
+                        decoder1.InitCaller(testName);
 
-        private class TestDecoderWithParameters : IImageDecoder
-        {
-            public string Param1 { get; set; }
+                        var decoder2 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 666 };
+                        decoder2.InitCaller(testName);
 
-            public int Param2 { get; set; }
+                        provider.GetImage(decoder1);
+                        Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
 
-            public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                invocationCounts[this.callerName]++;
-                return new Image<TPixel>(42, 42);
-            }
+                        provider.GetImage(decoder2);
+                        Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
+                    });
+        }
 
-            private static readonly ConcurrentDictionary<string, int> invocationCounts = new ConcurrentDictionary<string, int>();
+        [Theory]
+        [WithBlankImages(1, 1, PixelTypes.Rgba32)]
+        public void NoOutputSubfolderIsPresentByDefault<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel> =>
+            Assert.Empty(provider.Utility.OutputSubfolderName);
 
-            private string callerName = null;
+        [Theory]
+        [WithBlankImages(1, 1, PixelTypes.Rgba32, PixelTypes.Rgba32)]
+        [WithBlankImages(1, 1, PixelTypes.Alpha8, PixelTypes.Alpha8)]
+        [WithBlankImages(1, 1, PixelTypes.Argb32, PixelTypes.Argb32)]
+        public void PixelType_PropertyValueIsCorrect<TPixel>(TestImageProvider<TPixel> provider, PixelTypes expected)
+            where TPixel : struct, IPixel<TPixel> =>
+            Assert.Equal(expected, provider.PixelType);
 
-            internal void InitCaller(string name)
+        [Theory]
+        [WithFile(TestImages.Gif.Giphy, PixelTypes.Rgba32)]
+        public void SaveTestOutputFileMultiFrame<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
             {
-                this.callerName = name;
-                invocationCounts[name] = 0;
-            }
-
-            internal static int GetInvocationCount(string callerName) => invocationCounts[callerName];
-
-            private static readonly object Monitor = new object();
+                string[] files = provider.Utility.SaveTestOutputFileMultiFrame(image);
 
-            public static void DoTestThreadSafe(Action action)
-            {
-                lock (Monitor)
+                Assert.True(files.Length > 2);
+                foreach (string path in files)
                 {
-                    action();
+                    this.Output.WriteLine(path);
+                    Assert.True(File.Exists(path));
                 }
             }
         }
 
         [Theory]
-        [WithFile(TestImages.Bmp.F, PixelTypes.Rgba32)]
-        public void GetImage_WithCustomParametricDecoder_ShouldUtilizeCache_WhenParametersAreEqual<TPixel>(TestImageProvider<TPixel> provider)
+        [WithBasicTestPatternImages(50, 100, PixelTypes.Rgba32)]
+        [WithBasicTestPatternImages(49, 17, PixelTypes.Rgba32)]
+        [WithBasicTestPatternImages(20, 10, PixelTypes.Rgba32)]
+        public void Use_WithBasicTestPatternImages<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            if (!TestEnvironment.Is64BitProcess)
+            using (Image<TPixel> img = provider.GetImage())
             {
-                // We don't cache with the 32 bit build.
-                return;
+                img.DebugSave(provider);
             }
+        }
 
-            Assert.NotNull(provider.Utility.SourceFileOrDescription);
-
-            TestDecoderWithParameters.DoTestThreadSafe(() =>
-            {
-                string testName =
-                    nameof(this.GetImage_WithCustomParametricDecoder_ShouldUtilizeCache_WhenParametersAreEqual);
-
-                var decoder1 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 666 };
-                decoder1.InitCaller(testName);
+        [Theory]
+        [WithBlankImages(42, 666, PixelTypes.All, "hello")]
+        public void Use_WithBlankImagesAttribute_WithAllPixelTypes<TPixel>(
+            TestImageProvider<TPixel> provider,
+            string message)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Image<TPixel> img = provider.GetImage();
 
-                var decoder2 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 666 };
-                decoder2.InitCaller(testName);
+            Assert.Equal(42, img.Width);
+            Assert.Equal(666, img.Height);
+            Assert.Equal("hello", message);
+        }
 
-                provider.GetImage(decoder1);
-                Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
+        [Theory]
+        [WithBlankImages(42, 666, PixelTypes.Rgba32 | PixelTypes.Argb32 | PixelTypes.HalfSingle, "hello")]
+        public void Use_WithEmptyImageAttribute<TPixel>(TestImageProvider<TPixel> provider, string message)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Image<TPixel> img = provider.GetImage();
 
-                provider.GetImage(decoder2);
-                Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
-            });
+            Assert.Equal(42, img.Width);
+            Assert.Equal(666, img.Height);
+            Assert.Equal("hello", message);
         }
 
         [Theory]
-        [WithFile(TestImages.Bmp.F, PixelTypes.Rgba32)]
-        public void GetImage_WithCustomParametricDecoder_ShouldNotUtilizeCache_WhenParametersAreNotEqual<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFile(TestImages.Bmp.Car, PixelTypes.All, 123)]
+        [WithFile(TestImages.Bmp.F, PixelTypes.All, 123)]
+        public void Use_WithFileAttribute<TPixel>(TestImageProvider<TPixel> provider, int yo)
             where TPixel : struct, IPixel<TPixel>
         {
             Assert.NotNull(provider.Utility.SourceFileOrDescription);
-
-            TestDecoderWithParameters.DoTestThreadSafe(() =>
+            using (Image<TPixel> img = provider.GetImage())
             {
-                string testName =
-                    nameof(this.GetImage_WithCustomParametricDecoder_ShouldNotUtilizeCache_WhenParametersAreNotEqual);
-
-                var decoder1 = new TestDecoderWithParameters() { Param1 = "Lol", Param2 = 42 };
-                decoder1.InitCaller(testName);
-
-                var decoder2 = new TestDecoderWithParameters() { Param1 = "LoL", Param2 = 42 };
-                decoder2.InitCaller(testName);
+                Assert.True(img.Width * img.Height > 0);
 
-                provider.GetImage(decoder1);
-                Assert.Equal(1, TestDecoderWithParameters.GetInvocationCount(testName));
+                Assert.Equal(123, yo);
 
-                provider.GetImage(decoder2);
-                Assert.Equal(2, TestDecoderWithParameters.GetInvocationCount(testName));
-            });
+                string fn = provider.Utility.GetTestOutputFileName("jpg");
+                this.Output.WriteLine(fn);
+            }
         }
 
-
-        public static string[] AllBmpFiles =
-            {
-                TestImages.Bmp.F,
-                TestImages.Bmp.Bit8
-            };
+        [Theory]
+        [WithFile(TestImages.Jpeg.Baseline.Testorig420, PixelTypes.Rgba32)]
+        public void Use_WithFileAttribute_CustomConfig<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            EnsureCustomConfigurationIsApplied(provider);
+        }
 
         [Theory]
         [WithFileCollection(nameof(AllBmpFiles), PixelTypes.Rgba32 | PixelTypes.Argb32)]
@@ -249,20 +273,15 @@ namespace SixLabors.ImageSharp.Tests
         }
 
         [Theory]
-        [WithFile(TestImages.Gif.Giphy, PixelTypes.Rgba32)]
-        public void SaveTestOutputFileMultiFrame<TPixel>(TestImageProvider<TPixel> provider)
+        [WithMemberFactory(nameof(CreateTestImage), PixelTypes.All)]
+        public void Use_WithMemberFactoryAttribute<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
+            Image<TPixel> img = provider.GetImage();
+            Assert.Equal(3, img.Width);
+            if (provider.PixelType == PixelTypes.Rgba32)
             {
-                string[] files = provider.Utility.SaveTestOutputFileMultiFrame(image);
-
-                Assert.True(files.Length > 2);
-                foreach (string path in files)
-                {
-                    this.Output.WriteLine(path);
-                    Assert.True(File.Exists(path));
-                }
+                Assert.IsType<Image<Rgba32>>(img);
             }
         }
 
@@ -291,89 +310,112 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
-        /// <summary>
-        /// Need to us <see cref="GenericFactory{TPixel}"/> to create instance of <see cref="Image"/> when pixelType is StandardImageClass
-        /// </summary>
-        /// <typeparam name="TPixel"></typeparam>
-        /// <param name="factory"></param>
-        /// <returns></returns>
-        public static Image<TPixel> CreateTestImage<TPixel>()
-            where TPixel : struct, IPixel<TPixel> => new Image<TPixel>(3, 3);
-
         [Theory]
-        [WithMemberFactory(nameof(CreateTestImage), PixelTypes.All)]
-        public void Use_WithMemberFactoryAttribute<TPixel>(TestImageProvider<TPixel> provider)
+        [WithTestPatternImages(49, 20, PixelTypes.Rgba32)]
+        public void Use_WithTestPatternImages<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            Image<TPixel> img = provider.GetImage();
-            Assert.Equal(3, img.Width);
-            if (provider.PixelType == PixelTypes.Rgba32)
+            using (Image<TPixel> img = provider.GetImage())
             {
-                Assert.IsType<Image<Rgba32>>(img);
+                img.DebugSave(provider);
             }
-
         }
-
+        
         [Theory]
-        [WithTestPatternImages(49,20, PixelTypes.Rgba32)]
-        public void Use_WithTestPatternImages<TPixel>(TestImageProvider<TPixel> provider)
+        [WithTestPatternImages(20, 20, PixelTypes.Rgba32)]
+        public void Use_WithTestPatternImages_CustomConfiguration<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> img = provider.GetImage())
-            {
-                img.DebugSave(provider);
-            }
+            EnsureCustomConfigurationIsApplied(provider);
         }
 
-        [Theory]
-        [WithBasicTestPatternImages(50, 100, PixelTypes.Rgba32)]
-        [WithBasicTestPatternImages(49,17, PixelTypes.Rgba32)]
-        [WithBasicTestPatternImages(20, 10, PixelTypes.Rgba32)]
-        public void Use_WithBasicTestPatternImages<TPixel>(TestImageProvider<TPixel> provider)
+        private static void EnsureCustomConfigurationIsApplied<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> img = provider.GetImage())
+            using (var image1 = provider.GetImage())
             {
-                img.DebugSave(provider);
+                var customConfiguration = Configuration.CreateDefaultInstance();
+                provider.Configuration = customConfiguration;
+
+                using (var image2 = provider.GetImage())
+                using (var image3 = provider.GetImage())
+                {
+                    Assert.Same(customConfiguration, image2.GetConfiguration());
+                    Assert.Same(customConfiguration, image3.GetConfiguration());
+                }
             }
         }
 
-
-        public static readonly TheoryData<object> BasicData = new TheoryData<object>()
+        private class TestDecoder : IImageDecoder
         {
-            TestImageProvider<Rgba32>.Blank(10, 20),
-            TestImageProvider<HalfVector4>.Blank(
-                10,
-                20),
-        };
+            // Couldn't make xUnit happy without this hackery:
 
-        [Theory]
-        [MemberData(nameof(BasicData))]
-        public void Blank_MemberData<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            Image<TPixel> img = provider.GetImage();
+            private static readonly ConcurrentDictionary<string, int> invocationCounts =
+                new ConcurrentDictionary<string, int>();
 
-            Assert.True(img.Width * img.Height > 0);
+            private static readonly object Monitor = new object();
+
+            private string callerName = null;
+
+            public static void DoTestThreadSafe(Action action)
+            {
+                lock (Monitor)
+                {
+                    action();
+                }
+            }
+
+            public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                invocationCounts[this.callerName]++;
+                return new Image<TPixel>(42, 42);
+            }
+
+            internal static int GetInvocationCount(string callerName) => invocationCounts[callerName];
+
+            internal void InitCaller(string name)
+            {
+                this.callerName = name;
+                invocationCounts[name] = 0;
+            }
         }
 
-        public static readonly TheoryData<object> FileData = new TheoryData<object>()
+        private class TestDecoderWithParameters : IImageDecoder
         {
-            TestImageProvider<Rgba32>.File(TestImages.Bmp.Car),
-            TestImageProvider<HalfVector4>.File(TestImages.Bmp.F)
-        };
+            private static readonly ConcurrentDictionary<string, int> invocationCounts =
+                new ConcurrentDictionary<string, int>();
 
-        [Theory]
-        [MemberData(nameof(FileData))]
-        public void File_MemberData<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            this.Output.WriteLine("SRC: " + provider.Utility.SourceFileOrDescription);
-            this.Output.WriteLine("OUT: " + provider.Utility.GetTestOutputFileName());
+            private static readonly object Monitor = new object();
 
-            Image<TPixel> img = provider.GetImage();
+            private string callerName = null;
 
-            Assert.True(img.Width * img.Height > 0);
+            public string Param1 { get; set; }
+
+            public int Param2 { get; set; }
+
+            public static void DoTestThreadSafe(Action action)
+            {
+                lock (Monitor)
+                {
+                    action();
+                }
+            }
+
+            public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                invocationCounts[this.callerName]++;
+                return new Image<TPixel>(42, 42);
+            }
+
+            internal static int GetInvocationCount(string callerName) => invocationCounts[callerName];
+
+            internal void InitCaller(string name)
+            {
+                this.callerName = name;
+                invocationCounts[name] = 0;
+            }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index c7333d2a81..6db7ed95dd 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit c7333d2a81a74d1936bd202bcb6b16cbfe6bcdce
+Subproject commit 6db7ed95dd8a2de4caa6d885952b6689d026ad27

From 1612f495e2ac3ef571412758b4c802cd0727f645 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 21:15:50 +0200
Subject: [PATCH 075/223] more robust tests

---
 .../Processing/Processors/Transforms/ResizeTests.cs    | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 2ffb42916f..6d02b4b458 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -112,11 +112,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                     
                     Assert.NotEmpty(allocator.AllocationLog);
 
-                    var internalAllocations = allocator.AllocationLog.Where(
-                        e => e.ElementType == typeof(Vector4)).ToArray();
-                    
-                    int maxAllocationSize = internalAllocations.Max(e => e.LengthInBytes);
-                    
+                    int maxAllocationSize = allocator.AllocationLog.Where(
+                        e => e.ElementType == typeof(Vector4)).Max(e => e.LengthInBytes);
                     
                     Assert.True(maxAllocationSize <= Math.Max(workingBufferSizeHintInBytes, minimumWorkerAllocationInBytes));
                 }
@@ -256,6 +253,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
             var comparer = ImageComparer.TolerantPercentage(allowHigherInaccuracy ? 0.3f : 0.017f);
 
+            // Let's make the working buffer size non-default:
+            provider.Configuration.WorkingBufferSizeHintInBytes = 16 * 1024 * SizeOfVector4;
+            
             provider.RunValidatingProcessorTest(
                 ctx =>
                     {

From eb08150e6182fa930bbbd69f595f3f892f2ba4f9 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 21:42:39 +0200
Subject: [PATCH 076/223] ResizeTests.LargeImage

---
 .../Transforms/Resize/ResizeWorker.cs           |  7 ++++---
 .../Processors/Transforms/ResizeTests.cs        | 17 ++++++++++++++++-
 tests/Images/External                           |  2 +-
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index ce28a00ee7..9282c21283 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -114,7 +114,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 // Ensure offsets are normalized for cropping and padding.
                 ResizeKernel kernel = this.verticalKernelMap.GetKernel(y - this.targetOrigin.Y);
 
-                while (kernel.StartIndex + kernel.Length > this.currentWindow.Max)
+                if (kernel.StartIndex + kernel.Length > this.currentWindow.Max)
                 {
                     this.Slide();
                 }
@@ -145,8 +145,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private void Slide()
         {
-            int minY = this.currentWindow.Min + this.windowBandHeight;
-            int maxY = Math.Min(this.currentWindow.Max + this.windowBandHeight, this.sourceRectangle.Height);
+            int minY = this.currentWindow.Max - this.windowBandHeight;
+            int maxY = Math.Min(minY + this.workerHeight, this.sourceRectangle.Height);
+
             this.currentWindow = new RowInterval(minY, maxY);
             this.CalculateFirstPassValues(this.currentWindow);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 6d02b4b458..f4098aaf7e 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -34,12 +34,27 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         public static readonly string[] SmokeTestResamplerNames =
             {
-                nameof(KnownResamplers.NearestNeighbor), nameof(KnownResamplers.Bicubic), nameof(KnownResamplers.Box),
+                nameof(KnownResamplers.NearestNeighbor), 
+                nameof(KnownResamplers.Bicubic), 
+                nameof(KnownResamplers.Box),
                 nameof(KnownResamplers.Lanczos5),
             };
 
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
+        [Theory]
+        [WithTestPatternImages(4000, 4000, PixelTypes.Rgba32)]
+        public void LargeImage<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            if (!TestEnvironment.Is64BitProcess)
+            {
+                return;
+            }
+
+            provider.RunValidatingProcessorTest(x => x.Resize(300, 300), appendPixelTypeToFileName: false);
+        }
+        
         [Theory]
         [WithBasicTestPatternImages(15, 12, PixelTypes.Rgba32, 2, 3, 1, 2)]
         [WithBasicTestPatternImages(2, 256, PixelTypes.Rgba32, 1, 1, 1, 8)]
diff --git a/tests/Images/External b/tests/Images/External
index 6db7ed95dd..8693e2fd45 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 6db7ed95dd8a2de4caa6d885952b6689d026ad27
+Subproject commit 8693e2fd4577a9ac1a749da8db564095b5a05389

From c8bd3ce9f7524c5ae3093d801deb8c96d438d2d3 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 22:52:14 +0200
Subject: [PATCH 077/223] optimized sliding works!

---
 src/ImageSharp/Memory/Buffer2DExtensions.cs   | 28 ++++++++++++++++---
 .../Transforms/Resize/ResizeWorker.cs         | 17 ++++++++---
 .../ImageSharp.Tests/Memory/Buffer2DTests.cs  | 23 +++++++++++++++
 3 files changed, 60 insertions(+), 8 deletions(-)

diff --git a/src/ImageSharp/Memory/Buffer2DExtensions.cs b/src/ImageSharp/Memory/Buffer2DExtensions.cs
index c8bbf01c7f..61fcb99db2 100644
--- a/src/ImageSharp/Memory/Buffer2DExtensions.cs
+++ b/src/ImageSharp/Memory/Buffer2DExtensions.cs
@@ -3,7 +3,9 @@
 
 using System;
 using System.Buffers;
+using System.Diagnostics;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
 using SixLabors.Primitives;
 
@@ -27,8 +29,8 @@ namespace SixLabors.ImageSharp.Memory
         {
             DebugGuard.NotNull(buffer, nameof(buffer));
             DebugGuard.MustBeGreaterThanOrEqualTo(sourceIndex, 0, nameof(sourceIndex));
-            DebugGuard.MustBeGreaterThanOrEqualTo(destIndex, sourceIndex + columnCount, nameof(destIndex));
-            DebugGuard.MustBeLessThanOrEqualTo(destIndex, buffer.Width - columnCount, nameof(destIndex));
+            DebugGuard.MustBeGreaterThanOrEqualTo(destIndex, 0, nameof(sourceIndex));
+            CheckColumnRegionsDoNotOverlap(buffer, sourceIndex, destIndex, columnCount);
 
             int elementSize = Unsafe.SizeOf<T>();
             int width = buffer.Width * elementSize;
@@ -36,9 +38,11 @@ namespace SixLabors.ImageSharp.Memory
             int dOffset = destIndex * elementSize;
             long count = columnCount * elementSize;
 
-            using (MemoryHandle handle = buffer.Memory.Pin())
+            Span<byte> span = MemoryMarshal.AsBytes(buffer.Memory.Span);
+
+            fixed (byte* ptr = span)
             {
-                byte* basePtr = (byte*)handle.Pointer;
+                byte* basePtr = (byte*)ptr;
                 for (int y = 0; y < buffer.Height; y++)
                 {
                     byte* sPtr = basePtr + sOffset;
@@ -164,5 +168,21 @@ namespace SixLabors.ImageSharp.Memory
         {
             return buffer.MemorySource.GetSpan();
         }
+
+        [Conditional("DEBUG")]
+        private static void CheckColumnRegionsDoNotOverlap<T>(
+            Buffer2D<T> buffer,
+            int sourceIndex,
+            int destIndex,
+            int columnCount)
+            where T : struct
+        {
+            int minIndex = Math.Min(sourceIndex, destIndex);
+            int maxIndex = Math.Max(sourceIndex, destIndex);
+            if (maxIndex < minIndex + columnCount || maxIndex > buffer.Width - columnCount)
+            {
+                throw new InvalidOperationException("Column regions should not overlap!");
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 9282c21283..ed505e2219 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -148,14 +148,23 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             int minY = this.currentWindow.Max - this.windowBandHeight;
             int maxY = Math.Min(minY + this.workerHeight, this.sourceRectangle.Height);
 
+            // Copy previous bottom band to the new top:
+            // (rows <--> columns, because the buffer is transposed)
+            this.transposedFirstPassBuffer.CopyColumns(
+                this.workerHeight - this.windowBandHeight,
+                0,
+                this.windowBandHeight);
+
             this.currentWindow = new RowInterval(minY, maxY);
-            this.CalculateFirstPassValues(this.currentWindow);
+
+            // Calculate the remainder:
+            this.CalculateFirstPassValues(this.currentWindow.Slice(this.windowBandHeight));
         }
 
-        private void CalculateFirstPassValues(RowInterval window)
+        private void CalculateFirstPassValues(RowInterval calculationInterval)
         {
             Span<Vector4> tempRowSpan = this.tempRowBuffer.GetSpan();
-            for (int y = window.Min; y < window.Max; y++)
+            for (int y = calculationInterval.Min; y < calculationInterval.Max; y++)
             {
                 Span<TPixel> sourceRow = this.source.GetRowSpan(y);
 
@@ -166,7 +175,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     this.conversionModifiers);
 
                 // ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
-                Span<Vector4> firstPassSpan = this.transposedFirstPassBuffer.Span.Slice(y - window.Min);
+                Span<Vector4> firstPassSpan = this.transposedFirstPassBuffer.Span.Slice(y - this.currentWindow.Min);
 
                 for (int x = this.targetWorkingRect.Left; x < this.targetWorkingRect.Right; x++)
                 {
diff --git a/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs b/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
index 3d40875461..4af3b81e20 100644
--- a/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
+++ b/tests/ImageSharp.Tests/Memory/Buffer2DTests.cs
@@ -155,5 +155,28 @@ namespace SixLabors.ImageSharp.Tests.Memory
                 }
             }
         }
+
+        [Fact]
+        public void CopyColumns_InvokeMultipleTimes()
+        {
+            Random rnd = new Random(123);
+            using (Buffer2D<float> b = this.MemoryAllocator.Allocate2D<float>(100, 100))
+            {
+                rnd.RandomFill(b.Span, 0, 1);
+                
+                b.CopyColumns(0, 50, 22);
+                b.CopyColumns(0, 50, 22);
+
+                for (int y = 0; y < b.Height; y++)
+                {
+                    Span<float> row = b.GetRowSpan(y);
+
+                    Span<float> s = row.Slice(0, 22);
+                    Span<float> d = row.Slice(50, 22);
+                    
+                    Xunit.Assert.True(s.SequenceEqual(d));
+                }
+            }
+        }
     }
 }
\ No newline at end of file

From ea2682ff329f292da0f6a3852bf317cf294d7760 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 23:02:10 +0200
Subject: [PATCH 078/223] reapply unsafe optimizations

---
 .../Processors/Transforms/Resize/ResizeKernel.cs    |  8 ++++----
 .../Processors/Transforms/Resize/ResizeWorker.cs    | 13 +++++++------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
index 71cba90564..dce4e70d62 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs
@@ -55,11 +55,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         [MethodImpl(InliningOptions.ShortMethod)]
         public Vector4 Convolve(Span<Vector4> rowSpan)
         {
-            return this.ConvolveCore(rowSpan.Slice(this.StartIndex));
+            return this.ConvolveCore(ref rowSpan[this.StartIndex]);
         }
 
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Vector4 ConvolveCore(Span<Vector4> offsetedRowSpan)
+        public Vector4 ConvolveCore(ref Vector4 rowStartRef)
         {
             ref float horizontalValues = ref Unsafe.AsRef<float>(this.bufferPtr);
 
@@ -70,8 +70,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             {
                 float weight = Unsafe.Add(ref horizontalValues, i);
 
-                // Vector4 v = Unsafe.Add(ref rowStartRef, i);
-                Vector4 v = offsetedRowSpan[i];
+                // Vector4 v = offsetedRowSpan[i];
+                Vector4 v = Unsafe.Add(ref rowStartRef, i);
                 result += v * weight;
             }
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index ed505e2219..9b7d1d17c6 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -125,10 +125,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 for (int x = 0; x < this.destWidth; x++)
                 {
-                    Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
+                    // Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
+                    ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
 
                     // Destination color components
-                    Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(firstPassColumn);
+                    Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(ref firstPassColumnBase);
                 }
 
                 Span<TPixel> targetRowSpan = destination.GetRowSpan(y);
@@ -174,15 +175,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                     tempRowSpan,
                     this.conversionModifiers);
 
-                // ref Vector4 firstPassBaseRef = ref this.buffer.Span[y - top];
-                Span<Vector4> firstPassSpan = this.transposedFirstPassBuffer.Span.Slice(y - this.currentWindow.Min);
+                // Span<Vector4> firstPassSpan = this.transposedFirstPassBuffer.Span.Slice(y - this.currentWindow.Min);
+                ref Vector4 firstPassBaseRef = ref this.transposedFirstPassBuffer.Span[y - this.currentWindow.Min];
 
                 for (int x = this.targetWorkingRect.Left; x < this.targetWorkingRect.Right; x++)
                 {
                     ResizeKernel kernel = this.horizontalKernelMap.GetKernel(x - this.targetOrigin.X);
-                    firstPassSpan[x * this.workerHeight] = kernel.Convolve(tempRowSpan);
 
-                    // Unsafe.Add(ref firstPassBaseRef, x * this.sourceRectangle.Height) = kernel.Convolve(tempRowSpan);
+                    // firstPassSpan[x * this.workerHeight] = kernel.Convolve(tempRowSpan);
+                    Unsafe.Add(ref firstPassBaseRef, x * this.workerHeight) = kernel.Convolve(tempRowSpan);
                 }
             }
         }

From c10c6c311136e608bb8ac3ec2c39864f900903a1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 23:07:32 +0200
Subject: [PATCH 079/223] moar unsafe optimization

---
 .../Processing/Processors/Transforms/Resize/ResizeWorker.cs  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 9b7d1d17c6..7fe2638802 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -123,10 +123,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 int top = kernel.StartIndex - this.currentWindow.Min;
 
+                ref Vector4 fpBase = ref this.transposedFirstPassBuffer.Span[top];
+
                 for (int x = 0; x < this.destWidth; x++)
                 {
                     // Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
-                    ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
+                    // ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
+                    ref Vector4 firstPassColumnBase = ref Unsafe.Add(ref fpBase, x * this.workerHeight);
 
                     // Destination color components
                     Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(ref firstPassColumnBase);

From c80501a6e99bb8626affb3d226aaa09731df1ffc Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 00:08:29 +0200
Subject: [PATCH 080/223] benchmark WorkingBufferSizeHint effects

---
 .../ImageSharp.Benchmarks/Samplers/Resize.cs  | 61 +++++++++++++------
 .../Processors/Transforms/ResizeTests.cs      | 18 ++++--
 2 files changed, 57 insertions(+), 22 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
index 51f3a5653a..cb2481dbf1 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using System.Globalization;
 
 using BenchmarkDotNet.Attributes;
 
@@ -23,15 +24,21 @@ namespace SixLabors.ImageSharp.Benchmarks
 
         private Bitmap sourceBitmap;
 
-        [Params(3032)]
-        public int SourceSize { get; set; }
+        [Params("3032-400")]
+        public virtual string SourceToDest { get; set; } 
+        
+        protected int SourceSize { get; private set; }
+
+        protected int DestSize { get; private set; }
 
-        [Params(400)]
-        public int DestSize { get; set; }
 
         [GlobalSetup]
-        public void Setup()
+        public virtual void Setup()
         {
+            string[] stuff = this.SourceToDest.Split('-');
+            this.SourceSize = int.Parse(stuff[0], CultureInfo.InvariantCulture);
+            this.DestSize = int.Parse(stuff[1], CultureInfo.InvariantCulture);
+            
             this.sourceImage = new Image<TPixel>(this.Configuration, this.SourceSize, this.SourceSize);
             this.sourceBitmap = new Bitmap(this.SourceSize, this.SourceSize);
         }
@@ -95,26 +102,44 @@ namespace SixLabors.ImageSharp.Benchmarks
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
 
-        // RESULTS (2019 April):
+        // RESULTS - 2019 April - ResizeWorker:
         //
-        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.648 (1803/April2018Update/Redstone4)
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.706 (1803/April2018Update/Redstone4)
         // Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
-        // Frequency=2742192 Hz, Resolution=364.6718 ns, Timer=TSC
-        // .NET Core SDK=2.1.602
+        // Frequency=2742189 Hz, Resolution=364.6722 ns, Timer=TSC
+        // .NET Core SDK=2.2.202
         //   [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
-        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //   Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3394.0
         //   Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
         // 
-        // IterationCount=3  LaunchCount=1  WarmupCount=3
+        // IterationCount=3  LaunchCount=1  WarmupCount=3  
         // 
-        //                                    Method |  Job | Runtime | SourceSize | DestSize |      Mean |     Error |    StdDev | Ratio | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
-        // ----------------------------------------- |----- |-------- |----------- |--------- |----------:|----------:|----------:|------:|------------:|------------:|------------:|--------------------:|
-        //                             SystemDrawing |  Clr |     Clr |       3032 |      400 | 118.71 ms |  4.884 ms | 0.2677 ms |  1.00 |           - |           - |           - |              2048 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |       3032 |      400 |  94.55 ms | 16.160 ms | 0.8858 ms |  0.80 |           - |           - |           - |             16384 B |
-        //                                           |      |         |            |          |           |           |           |       |             |             |             |                     |
-        //                             SystemDrawing | Core |    Core |       3032 |      400 | 118.38 ms |  2.814 ms | 0.1542 ms |  1.00 |           - |           - |           - |                96 B |
-        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |       3032 |      400 |  90.28 ms |  4.679 ms | 0.2565 ms |  0.76 |           - |           - |           - |             15712 B |
+        //                                    Method |  Job | Runtime | SourceToDest |      Mean |     Error |    StdDev | Ratio | RatioSD | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
+        // ----------------------------------------- |----- |-------- |------------- |----------:|----------:|----------:|------:|--------:|------------:|------------:|------------:|--------------------:|
+        //                             SystemDrawing |  Clr |     Clr |     3032-400 | 120.11 ms |  1.435 ms | 0.0786 ms |  1.00 |    0.00 |           - |           - |           - |              1638 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' |  Clr |     Clr |     3032-400 |  75.32 ms | 34.143 ms | 1.8715 ms |  0.63 |    0.02 |           - |           - |           - |             16384 B |
+        //                                           |      |         |              |           |           |           |       |         |             |             |             |                     |
+        //                             SystemDrawing | Core |    Core |     3032-400 | 120.33 ms |  6.669 ms | 0.3656 ms |  1.00 |    0.00 |           - |           - |           - |                96 B |
+        //  'ImageSharp, MaxDegreeOfParallelism = 1' | Core |    Core |     3032-400 |  88.56 ms |  1.864 ms | 0.1022 ms |  0.74 |    0.00 |           - |           - |           - |             15568 B |
+    }
+
+    /// <summary>
+    /// Is it worth to set a larger working buffer limit for resize?
+    /// Conclusion: It doesn't really have an effect.
+    /// </summary>
+    public class Resize_Bicubic_Rgba32_CompareWorkBufferSizes : Resize_Bicubic_Rgba32
+    {
+        [Params(128, 512, 1024, 8 * 1024)]
+        public int WorkingBufferSizeHintInKilobytes { get; set; }
+
+        [Params("3032-400", "4000-300")]
+        public override string SourceToDest { get; set; }
 
+        public override void Setup()
+        {
+            this.Configuration.WorkingBufferSizeHintInBytes = this.WorkingBufferSizeHintInKilobytes * 1024;
+            base.Setup();
+        }
     }
 
     public class Resize_Bicubic_Bgra32 : ResizeBenchmarkBase<Bgra32>
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index f4098aaf7e..6bc2321de5 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -42,9 +42,13 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
-        [Theory]
-        [WithTestPatternImages(4000, 4000, PixelTypes.Rgba32)]
-        public void LargeImage<TPixel>(TestImageProvider<TPixel> provider)
+        [Theory(
+            Skip = "Debug only, enable manually"
+            )]
+        [WithTestPatternImages(4000, 4000, PixelTypes.Rgba32, 300, 1024)]
+        [WithTestPatternImages(3032, 3032, PixelTypes.Rgba32, 400, 1024)]
+        [WithTestPatternImages(3032, 3032, PixelTypes.Rgba32, 400, 128)]
+        public void LargeImage<TPixel>(TestImageProvider<TPixel> provider, int destSize, int workingBufferSizeHintInKilobytes)
             where TPixel : struct, IPixel<TPixel>
         {
             if (!TestEnvironment.Is64BitProcess)
@@ -52,7 +56,13 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 return;
             }
 
-            provider.RunValidatingProcessorTest(x => x.Resize(300, 300), appendPixelTypeToFileName: false);
+            provider.Configuration.WorkingBufferSizeHintInBytes = workingBufferSizeHintInKilobytes * 1024;
+
+            using (var image = provider.GetImage())
+            {
+                image.Mutate(x => x.Resize(destSize, destSize));
+                image.DebugSave(provider, appendPixelTypeToFileName: false);
+            }
         }
         
         [Theory]

From 0a6a085e91df9bc1a791b4efcf3d27616994a5ee Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 00:36:26 +0200
Subject: [PATCH 081/223] memory profiling with Sandbox46

---
 tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj | 2 +-
 tests/ImageSharp.Sandbox46/Program.cs                  | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj b/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
index cb286cc286..6569dc002e 100644
--- a/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
+++ b/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net461</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <Prefer32Bit>false</Prefer32Bit>
diff --git a/tests/ImageSharp.Sandbox46/Program.cs b/tests/ImageSharp.Sandbox46/Program.cs
index 02d4f80c55..afe7eb04ff 100644
--- a/tests/ImageSharp.Sandbox46/Program.cs
+++ b/tests/ImageSharp.Sandbox46/Program.cs
@@ -33,11 +33,11 @@ namespace SixLabors.ImageSharp.Sandbox46
         /// </param>
         public static void Main(string[] args)
         {
-            RunJpegColorProfilingTests();
+            // RunJpegColorProfilingTests();
 
             // RunDecodeJpegProfilingTests();
             // RunToVector4ProfilingTest();
-            // RunResizeProfilingTest();
+            RunResizeProfilingTest();
 
             Console.ReadLine();
         }
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Sandbox46
         private static void RunResizeProfilingTest()
         {
             var test = new ResizeProfilingBenchmarks(new ConsoleOutput());
-            test.ResizeBicubic(2000, 2000);
+            test.ResizeBicubic(4000, 4000);
         }
 
         private static void RunToVector4ProfilingTest()

From 606ab1f9939ecff0921b122f3b7ef1187694418a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 01:21:15 +0200
Subject: [PATCH 082/223] add ResizeWorker.pptx

---
 .../Transforms/Resize/The ResizeWorker.pptx     | Bin 0 -> 38674 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/Resize/The ResizeWorker.pptx

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/The ResizeWorker.pptx b/src/ImageSharp/Processing/Processors/Transforms/Resize/The ResizeWorker.pptx
new file mode 100644
index 0000000000000000000000000000000000000000..063f72de84022037dcd5d44331b3fce6b12efe3c
GIT binary patch
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From d004329fd4d56f084838006623e32237ae7a321f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 01:46:31 +0200
Subject: [PATCH 083/223] refine ResizeWorker.pptx

---
 ...he ResizeWorker.pptx => ResizeWorker.pptx} | Bin 38674 -> 45342 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename src/ImageSharp/Processing/Processors/Transforms/Resize/{The ResizeWorker.pptx => ResizeWorker.pptx} (59%)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/The ResizeWorker.pptx b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.pptx
similarity index 59%
rename from src/ImageSharp/Processing/Processors/Transforms/Resize/The ResizeWorker.pptx
rename to src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.pptx
index 063f72de84022037dcd5d44331b3fce6b12efe3c..66087ce5423736e5bcd615fd68cc75f0024778f8 100644
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From 7854901e6a3d28db32faa8c3e68ce3930bd313ba Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 02:15:38 +0200
Subject: [PATCH 084/223] xmldoc for ResizeWorker

---
 src/ImageSharp/Configuration.cs                   |  3 +--
 .../Processors/Transforms/Resize/ResizeWorker.cs  | 15 +++++++--------
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/src/ImageSharp/Configuration.cs b/src/ImageSharp/Configuration.cs
index 7cb014563d..4e8284c2cd 100644
--- a/src/ImageSharp/Configuration.cs
+++ b/src/ImageSharp/Configuration.cs
@@ -10,7 +10,6 @@ using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.IO;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp
@@ -108,7 +107,7 @@ namespace SixLabors.ImageSharp
         /// The default value is 1MB.
         /// </summary>
         /// <remarks>
-        /// Currently only used by <see cref="ResizeProcessor{TPixel}"/>.
+        /// Currently only used by Resize.
         /// </remarks>
         internal int WorkingBufferSizeHintInBytes { get; set; } = 1 * 1024 * 1024;
 
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 7fe2638802..00a8cfbf3d 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -14,6 +14,13 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
+    /// <summary>
+    /// Implements the resize algorithm using a sliding window of size
+    /// maximized by <see cref="Configuration.WorkingBufferSizeHintInBytes"/>.
+    /// The height of the window is a multiple of the vertical kernel's maximum diameter.
+    /// When sliding the window, the contents of the bottom window band are copied to the new top band.
+    /// For more details, and visual explanation, see "ResizeWorker.pptx".
+    /// </summary>
     internal class ResizeWorker<TPixel> : IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
@@ -127,8 +134,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 for (int x = 0; x < this.destWidth; x++)
                 {
-                    // Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
-                    // ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
                     ref Vector4 firstPassColumnBase = ref Unsafe.Add(ref fpBase, x * this.workerHeight);
 
                     // Destination color components
@@ -141,12 +146,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             }
         }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private Span<Vector4> GetColumnSpan(int x)
-        {
-            return this.transposedFirstPassBuffer.GetRowSpan(x);
-        }
-
         private void Slide()
         {
             int minY = this.currentWindow.Max - this.windowBandHeight;

From 7aae02deada1d33ffc9bd2730dcb8fb496d48b5d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 02:48:20 +0200
Subject: [PATCH 085/223] update ResizeWorker.pptx [skip CI]

---
 .../Transforms/Resize/ResizeWorker.pptx       | Bin 45342 -> 45638 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.pptx b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.pptx
index 66087ce5423736e5bcd615fd68cc75f0024778f8..248959170b01291490b7ab8c89dc646d3c2cb936 100644
GIT binary patch
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From 2743e878600db6aff9620e1983a82911d7230c36 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 13:17:54 +0200
Subject: [PATCH 086/223] fix tests

---
 .../Processing/Processors/Convolution/DetectEdgesTest.cs         | 1 +
 .../Processing/Processors/Transforms/ResizeTests.cs              | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
index de72f6d09e..edb24d6f10 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
@@ -42,6 +42,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
                         var bounds = new Rectangle(10, 10, size.Width / 2, size.Height / 2);
                         ctx.DetectEdges(bounds);
                     },
+                comparer: ValidatorComparer,
                 useReferenceOutputFrom: nameof(this.DetectEdges_InBox));
         }
 
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 6bc2321de5..e3a43a652e 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -131,6 +131,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                         testOutputDetails: workingBufferLimitInRows,
                         appendPixelTypeToFileName: false);
                     image.CompareToReferenceOutput(
+                        ImageComparer.TolerantPercentage(0.001f),
                         provider,
                         testOutputDetails: workingBufferLimitInRows,
                         appendPixelTypeToFileName: false);

From d72db6dc7882a9f85c87d4a75091c1ab92262f9a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 20 Apr 2019 13:21:15 +0200
Subject: [PATCH 087/223] fix license text in CopyBuffers benchmark

---
 tests/ImageSharp.Benchmarks/General/CopyBuffers.cs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
index 117cdba418..4c6458c306 100644
--- a/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
+++ b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
@@ -1,7 +1,5 @@
-// <copyright file="ArrayCopy.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
-// </copyright>
 
 using System;
 using System.Buffers;

From b4744dd07f5e756e7cc4e78a0ce26744d2aed269 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 22 Apr 2019 13:38:01 +0200
Subject: [PATCH 088/223] update travis.yml

---
 .travis.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 2515ca82a9..551ea129bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,10 +3,10 @@ solution: ImageSharp.sln
 
 matrix:
   include:
-    - os: linux # Ubuntu 14.04
-      dist: trusty
+    - os: linux # Ubuntu 16.04
+      dist: xenial
       sudo: required
-      dotnet: 2.1.401
+      dotnet: 2.1.603
       mono: latest
 #    - os: osx # OSX 10.11
 #      osx_image: xcode7.3.1
@@ -40,4 +40,4 @@ addons:
     notification_email: james_south@hotmail.com
     build_command_prepend: "dotnet restore"
     build_command:   "dotnet build -c Release"
-    branch_pattern: coverity_scan
\ No newline at end of file
+branch_pattern: coverity_scan
\ No newline at end of file

From ea74e91e006d4c0c0d549df7ce10fe7048026884 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 22 Apr 2019 13:44:10 +0200
Subject: [PATCH 089/223] I'm terrible copy-paster

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 551ea129bf..6fd38484dd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -40,4 +40,4 @@ addons:
     notification_email: james_south@hotmail.com
     build_command_prepend: "dotnet restore"
     build_command:   "dotnet build -c Release"
-branch_pattern: coverity_scan
\ No newline at end of file
+    branch_pattern: coverity_scan
\ No newline at end of file

From bee3a67a71d92b3dfd4c6ad54f08d6cf5f5c84af Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 22 Apr 2019 14:22:04 +0200
Subject: [PATCH 090/223] extend the CopyBuffers benchmark

---
 .../General/CopyBuffers.cs                    | 199 +++++++++++-------
 1 file changed, 124 insertions(+), 75 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
index 4c6458c306..32f1d10c79 100644
--- a/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
+++ b/tests/ImageSharp.Benchmarks/General/CopyBuffers.cs
@@ -88,12 +88,32 @@ namespace SixLabors.ImageSharp.Benchmarks.General
             this.sourceMemory.Span.CopyTo(this.destMemory.Span);
         }
 
-        [Benchmark(Description = "Unsafe.CopyBlock()")]
-        public unsafe void UnsafeCopyBlock()
+        [Benchmark(Description = "Unsafe.CopyBlock(ref)")]
+        public unsafe void UnsafeCopyBlockReferences()
+        {
+            Unsafe.CopyBlock(ref this.destArray[0], ref this.sourceArray[0], (uint)this.Count);
+        }
+        
+        [Benchmark(Description = "Unsafe.CopyBlock(ptr)")]
+        public unsafe void UnsafeCopyBlockPointers()
+        {
+            void* pinnedDestination = this.destHandle.Pointer;
+            void* pinnedSource = this.sourceHandle.Pointer;
+            Unsafe.CopyBlock(pinnedDestination, pinnedSource, (uint)this.Count);
+        }
+        
+        [Benchmark(Description = "Unsafe.CopyBlockUnaligned(ref)")]
+        public unsafe void UnsafeCopyBlockUnalignedReferences()
+        {
+            Unsafe.CopyBlockUnaligned(ref this.destArray[0], ref this.sourceArray[0], (uint)this.Count);
+        }
+        
+        [Benchmark(Description = "Unsafe.CopyBlockUnaligned(ptr)")]
+        public unsafe void UnsafeCopyBlockUnalignedPointers()
         {
             void* pinnedDestination = this.destHandle.Pointer;
             void* pinnedSource = this.sourceHandle.Pointer;
-            Unsafe.CopyBlock(pinnedSource, pinnedDestination, (uint)this.Count);
+            Unsafe.CopyBlockUnaligned(pinnedDestination, pinnedSource, (uint)this.Count);
         }
         
         // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17134.706 (1803/April2018Update/Redstone4)
@@ -106,77 +126,106 @@ namespace SixLabors.ImageSharp.Benchmarks.General
         // 
         // IterationCount=3  LaunchCount=1  WarmupCount=3  
         // 
-        //               Method |  Job | Runtime | Count |       Mean |      Error |    StdDev | Ratio | RatioSD | Gen 0/1k Op | Gen 1/1k Op | Gen 2/1k Op | Allocated Memory/Op |
-        // -------------------- |----- |-------- |------ |-----------:|-----------:|----------:|------:|--------:|------------:|------------:|------------:|--------------------:|
-        //         Array.Copy() |  Clr |     Clr |    10 |  23.579 ns |  1.6836 ns | 0.0923 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() |  Clr |     Clr |    10 |  11.796 ns |  0.5280 ns | 0.0289 ns |  0.50 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() |  Clr |     Clr |    10 |   3.206 ns |  8.1741 ns | 0.4480 ns |  0.14 |    0.02 |           - |           - |           - |                   - |
-        //       Marshal.Copy() |  Clr |     Clr |    10 |  15.577 ns |  2.0937 ns | 0.1148 ns |  0.66 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() |  Clr |     Clr |    10 |  32.287 ns |  2.4107 ns | 0.1321 ns |  1.37 |    0.01 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() |  Clr |     Clr |    10 |   3.266 ns |  0.3848 ns | 0.0211 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() | Core |    Core |    10 |  19.713 ns |  7.3026 ns | 0.4003 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() | Core |    Core |    10 |   7.332 ns |  0.5465 ns | 0.0300 ns |  0.37 |    0.01 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() | Core |    Core |    10 |   2.476 ns |  0.3476 ns | 0.0191 ns |  0.13 |    0.00 |           - |           - |           - |                   - |
-        //       Marshal.Copy() | Core |    Core |    10 |  15.575 ns |  0.1335 ns | 0.0073 ns |  0.79 |    0.02 |           - |           - |           - |                   - |
-        //        Span.CopyTo() | Core |    Core |    10 |  25.321 ns |  2.3556 ns | 0.1291 ns |  1.28 |    0.02 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() | Core |    Core |    10 |   2.204 ns |  0.1836 ns | 0.0101 ns |  0.11 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() |  Clr |     Clr |    50 |  35.217 ns |  2.7642 ns | 0.1515 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() |  Clr |     Clr |    50 |  24.224 ns |  0.8737 ns | 0.0479 ns |  0.69 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() |  Clr |     Clr |    50 |   3.827 ns |  4.8733 ns | 0.2671 ns |  0.11 |    0.01 |           - |           - |           - |                   - |
-        //       Marshal.Copy() |  Clr |     Clr |    50 |  28.103 ns |  1.3570 ns | 0.0744 ns |  0.80 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() |  Clr |     Clr |    50 |  34.137 ns |  2.9274 ns | 0.1605 ns |  0.97 |    0.01 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() |  Clr |     Clr |    50 |   4.999 ns |  0.1778 ns | 0.0097 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() | Core |    Core |    50 |  20.925 ns |  1.0219 ns | 0.0560 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() | Core |    Core |    50 |   8.083 ns |  0.2158 ns | 0.0118 ns |  0.39 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() | Core |    Core |    50 |   2.919 ns |  0.2878 ns | 0.0158 ns |  0.14 |    0.00 |           - |           - |           - |                   - |
-        //       Marshal.Copy() | Core |    Core |    50 |  16.663 ns |  0.2505 ns | 0.0137 ns |  0.80 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() | Core |    Core |    50 |  26.940 ns | 11.5855 ns | 0.6350 ns |  1.29 |    0.03 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() | Core |    Core |    50 |   1.940 ns |  0.6327 ns | 0.0347 ns |  0.09 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() |  Clr |     Clr |   100 |  39.284 ns |  0.5647 ns | 0.0310 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() |  Clr |     Clr |   100 |  28.930 ns |  0.6774 ns | 0.0371 ns |  0.74 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() |  Clr |     Clr |   100 |   5.859 ns |  2.7931 ns | 0.1531 ns |  0.15 |    0.00 |           - |           - |           - |                   - |
-        //       Marshal.Copy() |  Clr |     Clr |   100 |  36.529 ns |  0.9886 ns | 0.0542 ns |  0.93 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() |  Clr |     Clr |   100 |  36.152 ns |  1.5109 ns | 0.0828 ns |  0.92 |    0.00 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() |  Clr |     Clr |   100 |   9.317 ns |  0.4342 ns | 0.0238 ns |  0.24 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() | Core |    Core |   100 |  22.899 ns |  8.4066 ns | 0.4608 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() | Core |    Core |   100 |  10.696 ns |  0.8106 ns | 0.0444 ns |  0.47 |    0.01 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() | Core |    Core |   100 |   4.102 ns |  0.9040 ns | 0.0496 ns |  0.18 |    0.01 |           - |           - |           - |                   - |
-        //       Marshal.Copy() | Core |    Core |   100 |  17.917 ns |  2.6490 ns | 0.1452 ns |  0.78 |    0.01 |           - |           - |           - |                   - |
-        //        Span.CopyTo() | Core |    Core |   100 |  28.247 ns |  0.6375 ns | 0.0349 ns |  1.23 |    0.03 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() | Core |    Core |   100 |   3.611 ns |  0.4792 ns | 0.0263 ns |  0.16 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() |  Clr |     Clr |  1000 |  48.907 ns |  4.4228 ns | 0.2424 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() |  Clr |     Clr |  1000 |  40.653 ns |  1.4055 ns | 0.0770 ns |  0.83 |    0.01 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() |  Clr |     Clr |  1000 |  24.720 ns |  1.2651 ns | 0.0693 ns |  0.51 |    0.00 |           - |           - |           - |                   - |
-        //       Marshal.Copy() |  Clr |     Clr |  1000 |  42.336 ns |  2.2466 ns | 0.1231 ns |  0.87 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() |  Clr |     Clr |  1000 |  70.735 ns |  2.6215 ns | 0.1437 ns |  1.45 |    0.01 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() |  Clr |     Clr |  1000 |  44.520 ns |  0.9641 ns | 0.0528 ns |  0.91 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() | Core |    Core |  1000 |  46.286 ns | 11.6373 ns | 0.6379 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() | Core |    Core |  1000 |  34.243 ns |  7.2264 ns | 0.3961 ns |  0.74 |    0.01 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() | Core |    Core |  1000 |  23.135 ns |  0.3153 ns | 0.0173 ns |  0.50 |    0.01 |           - |           - |           - |                   - |
-        //       Marshal.Copy() | Core |    Core |  1000 |  46.219 ns |  1.2869 ns | 0.0705 ns |  1.00 |    0.01 |           - |           - |           - |                   - |
-        //        Span.CopyTo() | Core |    Core |  1000 |  45.371 ns |  3.3581 ns | 0.1841 ns |  0.98 |    0.02 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() | Core |    Core |  1000 |  29.347 ns |  1.1349 ns | 0.0622 ns |  0.63 |    0.01 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() |  Clr |     Clr | 10000 | 218.445 ns |  9.2567 ns | 0.5074 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() |  Clr |     Clr | 10000 | 209.610 ns |  6.7447 ns | 0.3697 ns |  0.96 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() |  Clr |     Clr | 10000 | 213.061 ns | 66.6490 ns | 3.6533 ns |  0.98 |    0.02 |           - |           - |           - |                   - |
-        //       Marshal.Copy() |  Clr |     Clr | 10000 | 214.426 ns | 27.7722 ns | 1.5223 ns |  0.98 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() |  Clr |     Clr | 10000 | 486.728 ns | 12.1537 ns | 0.6662 ns |  2.23 |    0.00 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() |  Clr |     Clr | 10000 | 452.973 ns | 25.1490 ns | 1.3785 ns |  2.07 |    0.00 |           - |           - |           - |                   - |
-        //                      |      |         |       |            |            |           |       |         |             |             |             |                     |
-        //         Array.Copy() | Core |    Core | 10000 | 203.365 ns |  3.2200 ns | 0.1765 ns |  1.00 |    0.00 |           - |           - |           - |                   - |
-        //   Buffer.BlockCopy() | Core |    Core | 10000 | 193.319 ns |  8.3370 ns | 0.4570 ns |  0.95 |    0.00 |           - |           - |           - |                   - |
-        //  Buffer.MemoryCopy() | Core |    Core | 10000 | 196.541 ns | 37.8056 ns | 2.0723 ns |  0.97 |    0.01 |           - |           - |           - |                   - |
-        //       Marshal.Copy() | Core |    Core | 10000 | 206.454 ns |  3.7652 ns | 0.2064 ns |  1.02 |    0.00 |           - |           - |           - |                   - |
-        //        Span.CopyTo() | Core |    Core | 10000 | 214.799 ns |  3.0667 ns | 0.1681 ns |  1.06 |    0.00 |           - |           - |           - |                   - |
-        //   Unsafe.CopyBlock() | Core |    Core | 10000 | 134.428 ns |  2.6024 ns | 0.1426 ns |  0.66 |    0.00 |           - |           - |           - |                   - |
-
+        // |                         Method |  Job | Runtime | Count |       Mean |      Error |    StdDev | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated |
+        // |------------------------------- |----- |-------- |------ |-----------:|-----------:|----------:|------:|--------:|------:|------:|------:|----------:|
+        // |                   Array.Copy() |  Clr |     Clr |    10 |  23.636 ns |  2.5299 ns | 0.1387 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() |  Clr |     Clr |    10 |  11.420 ns |  2.3341 ns | 0.1279 ns |  0.48 |    0.01 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() |  Clr |     Clr |    10 |   2.861 ns |  0.5059 ns | 0.0277 ns |  0.12 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() |  Clr |     Clr |    10 |  14.870 ns |  2.4541 ns | 0.1345 ns |  0.63 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() |  Clr |     Clr |    10 |  31.906 ns |  1.2213 ns | 0.0669 ns |  1.35 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) |  Clr |     Clr |    10 |   3.513 ns |  0.7392 ns | 0.0405 ns |  0.15 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) |  Clr |     Clr |    10 |   3.053 ns |  0.2010 ns | 0.0110 ns |  0.13 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) |  Clr |     Clr |    10 |   3.497 ns |  0.4911 ns | 0.0269 ns |  0.15 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) |  Clr |     Clr |    10 |   3.109 ns |  0.5958 ns | 0.0327 ns |  0.13 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() | Core |    Core |    10 |  19.709 ns |  2.1867 ns | 0.1199 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() | Core |    Core |    10 |   7.377 ns |  1.1582 ns | 0.0635 ns |  0.37 |    0.01 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() | Core |    Core |    10 |   2.581 ns |  1.1607 ns | 0.0636 ns |  0.13 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() | Core |    Core |    10 |  15.197 ns |  2.8446 ns | 0.1559 ns |  0.77 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() | Core |    Core |    10 |  25.394 ns |  0.9782 ns | 0.0536 ns |  1.29 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) | Core |    Core |    10 |   2.254 ns |  0.1590 ns | 0.0087 ns |  0.11 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) | Core |    Core |    10 |   1.878 ns |  0.1035 ns | 0.0057 ns |  0.10 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) | Core |    Core |    10 |   2.263 ns |  0.1383 ns | 0.0076 ns |  0.11 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) | Core |    Core |    10 |   1.877 ns |  0.0602 ns | 0.0033 ns |  0.10 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() |  Clr |     Clr |    50 |  35.068 ns |  5.9137 ns | 0.3242 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() |  Clr |     Clr |    50 |  23.299 ns |  2.3797 ns | 0.1304 ns |  0.66 |    0.01 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() |  Clr |     Clr |    50 |   3.598 ns |  4.8536 ns | 0.2660 ns |  0.10 |    0.01 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() |  Clr |     Clr |    50 |  27.720 ns |  4.6602 ns | 0.2554 ns |  0.79 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() |  Clr |     Clr |    50 |  35.673 ns | 16.2972 ns | 0.8933 ns |  1.02 |    0.03 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) |  Clr |     Clr |    50 |   5.534 ns |  2.8119 ns | 0.1541 ns |  0.16 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) |  Clr |     Clr |    50 |   4.511 ns |  0.9555 ns | 0.0524 ns |  0.13 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) |  Clr |     Clr |    50 |   5.613 ns |  1.6679 ns | 0.0914 ns |  0.16 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) |  Clr |     Clr |    50 |   4.884 ns |  7.3153 ns | 0.4010 ns |  0.14 |    0.01 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() | Core |    Core |    50 |  20.232 ns |  1.5720 ns | 0.0862 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() | Core |    Core |    50 |   8.142 ns |  0.7860 ns | 0.0431 ns |  0.40 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() | Core |    Core |    50 |   2.962 ns |  0.0611 ns | 0.0033 ns |  0.15 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() | Core |    Core |    50 |  16.802 ns |  2.9686 ns | 0.1627 ns |  0.83 |    0.00 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() | Core |    Core |    50 |  26.571 ns |  0.9228 ns | 0.0506 ns |  1.31 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) | Core |    Core |    50 |   2.219 ns |  0.7191 ns | 0.0394 ns |  0.11 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) | Core |    Core |    50 |   1.751 ns |  0.1884 ns | 0.0103 ns |  0.09 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) | Core |    Core |    50 |   2.177 ns |  0.4489 ns | 0.0246 ns |  0.11 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) | Core |    Core |    50 |   1.806 ns |  0.1063 ns | 0.0058 ns |  0.09 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() |  Clr |     Clr |   100 |  39.158 ns |  4.3068 ns | 0.2361 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() |  Clr |     Clr |   100 |  27.623 ns |  0.4611 ns | 0.0253 ns |  0.71 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() |  Clr |     Clr |   100 |   5.018 ns |  0.5689 ns | 0.0312 ns |  0.13 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() |  Clr |     Clr |   100 |  33.527 ns |  1.9019 ns | 0.1042 ns |  0.86 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() |  Clr |     Clr |   100 |  35.604 ns |  2.7039 ns | 0.1482 ns |  0.91 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) |  Clr |     Clr |   100 |   7.853 ns |  0.4925 ns | 0.0270 ns |  0.20 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) |  Clr |     Clr |   100 |   7.406 ns |  1.9733 ns | 0.1082 ns |  0.19 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) |  Clr |     Clr |   100 |   7.822 ns |  0.6837 ns | 0.0375 ns |  0.20 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) |  Clr |     Clr |   100 |   7.392 ns |  1.2832 ns | 0.0703 ns |  0.19 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() | Core |    Core |   100 |  22.909 ns |  2.9754 ns | 0.1631 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() | Core |    Core |   100 |  10.687 ns |  1.1262 ns | 0.0617 ns |  0.47 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() | Core |    Core |   100 |   4.063 ns |  0.1607 ns | 0.0088 ns |  0.18 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() | Core |    Core |   100 |  18.067 ns |  4.0557 ns | 0.2223 ns |  0.79 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() | Core |    Core |   100 |  28.352 ns |  1.2762 ns | 0.0700 ns |  1.24 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) | Core |    Core |   100 |   4.130 ns |  0.2013 ns | 0.0110 ns |  0.18 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) | Core |    Core |   100 |   4.096 ns |  0.2460 ns | 0.0135 ns |  0.18 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) | Core |    Core |   100 |   4.160 ns |  0.3174 ns | 0.0174 ns |  0.18 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) | Core |    Core |   100 |   3.480 ns |  1.1683 ns | 0.0640 ns |  0.15 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() |  Clr |     Clr |  1000 |  49.059 ns |  2.0729 ns | 0.1136 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() |  Clr |     Clr |  1000 |  38.270 ns | 23.6970 ns | 1.2989 ns |  0.78 |    0.03 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() |  Clr |     Clr |  1000 |  27.599 ns |  6.8328 ns | 0.3745 ns |  0.56 |    0.01 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() |  Clr |     Clr |  1000 |  42.752 ns |  5.1357 ns | 0.2815 ns |  0.87 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() |  Clr |     Clr |  1000 |  69.983 ns |  2.1860 ns | 0.1198 ns |  1.43 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) |  Clr |     Clr |  1000 |  44.822 ns |  0.1625 ns | 0.0089 ns |  0.91 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) |  Clr |     Clr |  1000 |  45.072 ns |  1.4053 ns | 0.0770 ns |  0.92 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) |  Clr |     Clr |  1000 |  45.306 ns |  5.2646 ns | 0.2886 ns |  0.92 |    0.01 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) |  Clr |     Clr |  1000 |  44.813 ns |  0.9117 ns | 0.0500 ns |  0.91 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() | Core |    Core |  1000 |  51.907 ns |  3.1827 ns | 0.1745 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() | Core |    Core |  1000 |  40.700 ns |  3.1488 ns | 0.1726 ns |  0.78 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() | Core |    Core |  1000 |  23.711 ns |  1.3004 ns | 0.0713 ns |  0.46 |    0.00 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() | Core |    Core |  1000 |  42.586 ns |  2.5390 ns | 0.1392 ns |  0.82 |    0.00 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() | Core |    Core |  1000 |  44.109 ns |  4.5604 ns | 0.2500 ns |  0.85 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) | Core |    Core |  1000 |  33.926 ns |  5.1633 ns | 0.2830 ns |  0.65 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) | Core |    Core |  1000 |  33.267 ns |  0.2708 ns | 0.0148 ns |  0.64 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) | Core |    Core |  1000 |  34.018 ns |  2.3238 ns | 0.1274 ns |  0.66 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) | Core |    Core |  1000 |  33.667 ns |  2.1983 ns | 0.1205 ns |  0.65 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() |  Clr |     Clr | 10000 | 153.429 ns |  6.1735 ns | 0.3384 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() |  Clr |     Clr | 10000 | 201.373 ns |  4.3670 ns | 0.2394 ns |  1.31 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() |  Clr |     Clr | 10000 | 211.768 ns | 71.3510 ns | 3.9110 ns |  1.38 |    0.02 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() |  Clr |     Clr | 10000 | 215.299 ns | 17.2677 ns | 0.9465 ns |  1.40 |    0.01 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() |  Clr |     Clr | 10000 | 486.325 ns | 32.4445 ns | 1.7784 ns |  3.17 |    0.01 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) |  Clr |     Clr | 10000 | 452.314 ns | 33.0593 ns | 1.8121 ns |  2.95 |    0.02 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) |  Clr |     Clr | 10000 | 455.600 ns | 56.7534 ns | 3.1108 ns |  2.97 |    0.02 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) |  Clr |     Clr | 10000 | 452.279 ns |  8.6457 ns | 0.4739 ns |  2.95 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) |  Clr |     Clr | 10000 | 453.146 ns | 12.3776 ns | 0.6785 ns |  2.95 |    0.00 |     - |     - |     - |         - |
+        // |                                |      |         |       |            |            |           |       |         |       |       |       |           |
+        // |                   Array.Copy() | Core |    Core | 10000 | 204.508 ns |  3.1652 ns | 0.1735 ns |  1.00 |    0.00 |     - |     - |     - |         - |
+        // |             Buffer.BlockCopy() | Core |    Core | 10000 | 193.345 ns |  1.3742 ns | 0.0753 ns |  0.95 |    0.00 |     - |     - |     - |         - |
+        // |            Buffer.MemoryCopy() | Core |    Core | 10000 | 196.978 ns | 18.3279 ns | 1.0046 ns |  0.96 |    0.01 |     - |     - |     - |         - |
+        // |                 Marshal.Copy() | Core |    Core | 10000 | 206.878 ns |  6.9938 ns | 0.3834 ns |  1.01 |    0.00 |     - |     - |     - |         - |
+        // |                  Span.CopyTo() | Core |    Core | 10000 | 215.733 ns | 15.4824 ns | 0.8486 ns |  1.05 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ref) | Core |    Core | 10000 | 186.894 ns |  8.7617 ns | 0.4803 ns |  0.91 |    0.00 |     - |     - |     - |         - |
+        // |          Unsafe.CopyBlock(ptr) | Core |    Core | 10000 | 186.662 ns | 10.6059 ns | 0.5813 ns |  0.91 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ref) | Core |    Core | 10000 | 187.489 ns | 13.1527 ns | 0.7209 ns |  0.92 |    0.00 |     - |     - |     - |         - |
+        // | Unsafe.CopyBlockUnaligned(ptr) | Core |    Core | 10000 | 186.586 ns |  4.6274 ns | 0.2536 ns |  0.91 |    0.00 |     - |     - |     - |         - |
     }
 }
\ No newline at end of file

From 04e607a651f2a535af8eb0d79f756b99fa79a129 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 22 Apr 2019 15:52:54 +0200
Subject: [PATCH 091/223] use HashCode.Combine()

---
 src/ImageSharp/Memory/RowInterval.cs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 3ee7ae774d..815918754a 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -65,12 +65,6 @@ namespace SixLabors.ImageSharp.Memory
             return !ReferenceEquals(null, obj) && obj is RowInterval other && this.Equals(other);
         }
 
-        public override int GetHashCode()
-        {
-            unchecked
-            {
-                return (this.Min * 397) ^ this.Max;
-            }
-        }
+        public override int GetHashCode() => HashCode.Combine(this.Min, this.Max);
     }
 }
\ No newline at end of file

From c6be724f7e2938fe2cc54940bce7fa5b04d40f7a Mon Sep 17 00:00:00 2001
From: Daniil Samoylov <xdansam@gmail.com>
Date: Tue, 23 Apr 2019 16:26:17 +1200
Subject: [PATCH 092/223] Pass correct output size in ResizeMode.Min #892
 (#893)

---
 .../Transforms/Resize/ResizeHelper.cs         |  2 +-
 .../Transforms/ResizeHelperTests.cs           | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
index 956e6b84e7..ae7b112fc1 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeHelper.cs
@@ -296,7 +296,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             // Don't upscale
             if (width > sourceWidth || height > sourceHeight)
             {
-                return (new Size(sourceWidth, sourceWidth), new Rectangle(0, 0, sourceWidth, sourceHeight));
+                return (new Size(sourceWidth, sourceHeight), new Rectangle(0, 0, sourceWidth, sourceHeight));
             }
 
             // Find the shortest distance to go.
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs
index b0d8ef6531..b5ed64f7ef 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeHelperTests.cs
@@ -1,7 +1,9 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
+using SixLabors.Primitives;
 
 using Xunit;
 
@@ -31,5 +33,24 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             int actualCount = ResizeHelper.CalculateResizeWorkerHeightInWindowBands(windowDiameter, width, sizeLimitHintInBytes);
             Assert.Equal(expectedCount, actualCount);
         }
+
+        [Fact]
+        public void CalculateMinRectangleWhenSourceIsSmallerThanTarget()
+        {
+            var sourceSize = new Size(200, 100);
+            var target = new Size(400, 200);
+
+            var actual = ResizeHelper.CalculateTargetLocationAndBounds(
+                sourceSize,
+                new ResizeOptions{
+                    Mode = ResizeMode.Min,
+                    Size = target
+                },
+                target.Width,
+                target.Height);
+            
+            Assert.Equal(sourceSize, actual.Item1);
+            Assert.Equal(new Rectangle(0, 0, sourceSize.Width, sourceSize.Height), actual.Item2);
+        }
     }
 }
\ No newline at end of file

From e59e5315a83baeebf4fbb68a0edc40d1dab1db9b Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 25 Apr 2019 23:29:03 +1000
Subject: [PATCH 093/223] Cleanup General Convolution (#887)

* Remove multiple premultiplication.

* Use in DenseMatrix everywhere.

* Make private

* Dont convert vector row on first pass

* Remove incorrectly assigned alpha.

* Remove boxing.

* Use correct min row.

* Reorder parameters

* Correctly handle alpha component.

* Update tests

* Use dedicated methods over branching.
---
 .../Processing/PatternBrush{TPixel}.cs        |   9 +-
 .../Common/Helpers/DenseMatrixUtils.cs        | 240 +++++++++++++++---
 .../Convolution/BoxBlurProcessor.cs           |   3 +-
 .../Convolution/Convolution2DProcessor.cs     |  48 +++-
 .../Convolution/Convolution2PassProcessor.cs  |  53 +++-
 .../Convolution/ConvolutionProcessor.cs       |  50 +++-
 .../Convolution/EdgeDetector2DProcessor.cs    |   5 +-
 .../EdgeDetectorCompassProcessor.cs           |  20 +-
 .../Convolution/EdgeDetectorProcessor.cs      |   6 +-
 .../Convolution/GaussianBlurProcessor.cs      |   2 +-
 .../Convolution/GaussianSharpenProcessor.cs   |   2 +-
 .../Processors/Dithering/ErrorDiffuserBase.cs |   2 +-
 .../Samplers/GaussianBlur.cs                  |  19 ++
 .../DataWriter/IccDataWriter.MatrixTests.cs   |   2 +-
 .../Processors/Convolution/BoxBlurTest.cs     |   2 +-
 .../Processors/Convolution/DetectEdgesTest.cs |   2 +
 16 files changed, 378 insertions(+), 87 deletions(-)
 create mode 100644 tests/ImageSharp.Benchmarks/Samplers/GaussianBlur.cs

diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
index 46ed36f687..20161b517d 100644
--- a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
@@ -61,7 +61,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="foreColor">Color of the fore.</param>
         /// <param name="backColor">Color of the back.</param>
         /// <param name="pattern">The pattern.</param>
-        internal PatternBrush(TPixel foreColor, TPixel backColor, DenseMatrix<bool> pattern)
+        internal PatternBrush(TPixel foreColor, TPixel backColor, in DenseMatrix<bool> pattern)
         {
             var foreColorVector = foreColor.ToVector4();
             var backColorVector = backColor.ToVector4();
@@ -93,10 +93,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <inheritdoc />
-        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
-        {
-            return new PatternBrushApplicator(source, this.pattern, this.patternVector, options);
-        }
+        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options) => new PatternBrushApplicator(source, this.pattern, this.patternVector, options);
 
         /// <summary>
         /// The pattern brush applicator.
@@ -116,7 +113,7 @@ namespace SixLabors.ImageSharp.Processing
             /// <param name="pattern">The pattern.</param>
             /// <param name="patternVector">The patternVector.</param>
             /// <param name="options">The options</param>
-            public PatternBrushApplicator(ImageFrame<TPixel> source, DenseMatrix<TPixel> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
+            public PatternBrushApplicator(ImageFrame<TPixel> source, in DenseMatrix<TPixel> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
                 : base(source, options)
             {
                 this.pattern = pattern;
diff --git a/src/ImageSharp/Common/Helpers/DenseMatrixUtils.cs b/src/ImageSharp/Common/Helpers/DenseMatrixUtils.cs
index 2e700c9d67..427b240057 100644
--- a/src/ImageSharp/Common/Helpers/DenseMatrixUtils.cs
+++ b/src/ImageSharp/Common/Helpers/DenseMatrixUtils.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Numerics;
+using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
@@ -11,83 +12,120 @@ namespace SixLabors.ImageSharp
 {
     /// <summary>
     /// Extension methods for <see cref="DenseMatrix{T}"/>.
+    /// TODO: One day rewrite all this to use SIMD intrinsics. There's a lot of scope for improvement.
     /// </summary>
     internal static class DenseMatrixUtils
     {
         /// <summary>
-        /// Computes the sum of vectors in <paramref name="targetRow"/> weighted by the kernel weight values.
+        /// Computes the sum of vectors in the span referenced by <paramref name="targetRowRef"/> weighted by the two kernel weight values.
+        /// Using this method the convolution filter is not applied to alpha in addition to the color channels.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="matrix">The dense matrix.</param>
+        /// <param name="matrixY">The vertical dense matrix.</param>
+        /// <param name="matrixX">The horizontal dense matrix.</param>
         /// <param name="sourcePixels">The source frame.</param>
-        /// <param name="targetRow">The target row.</param>
+        /// <param name="targetRowRef">The target row base reference.</param>
         /// <param name="row">The current row.</param>
         /// <param name="column">The current column.</param>
+        /// <param name="minRow">The minimum working area row.</param>
         /// <param name="maxRow">The maximum working area row.</param>
+        /// <param name="minColumn">The minimum working area column.</param>
         /// <param name="maxColumn">The maximum working area column.</param>
-        /// <param name="offsetColumn">The column offset to apply to source sampling.</param>
-        public static void Convolve<TPixel>(
-            in DenseMatrix<float> matrix,
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Convolve2D3<TPixel>(
+            in DenseMatrix<float> matrixY,
+            in DenseMatrix<float> matrixX,
             Buffer2D<TPixel> sourcePixels,
-            Span<Vector4> targetRow,
+            ref Vector4 targetRowRef,
             int row,
             int column,
+            int minRow,
             int maxRow,
-            int maxColumn,
-            int offsetColumn)
+            int minColumn,
+            int maxColumn)
             where TPixel : struct, IPixel<TPixel>
         {
             Vector4 vector = default;
-            int matrixHeight = matrix.Rows;
-            int matrixWidth = matrix.Columns;
-            int radiusY = matrixHeight >> 1;
-            int radiusX = matrixWidth >> 1;
-            int sourceOffsetColumnBase = column + offsetColumn;
-
-            for (int y = 0; y < matrixHeight; y++)
-            {
-                int offsetY = (row + y - radiusY).Clamp(0, maxRow);
-                Span<TPixel> sourceRowSpan = sourcePixels.GetRowSpan(offsetY);
 
-                for (int x = 0; x < matrixWidth; x++)
-                {
-                    int offsetX = (sourceOffsetColumnBase + x - radiusX).Clamp(offsetColumn, maxColumn);
-                    var currentColor = sourceRowSpan[offsetX].ToVector4();
-                    Vector4Utils.Premultiply(ref currentColor);
-
-                    vector += matrix[y, x] * currentColor;
-                }
-            }
+            Convolve2DImpl(
+                in matrixY,
+                in matrixX,
+                sourcePixels,
+                row,
+                column,
+                minRow,
+                maxRow,
+                minColumn,
+                maxColumn,
+                ref vector);
 
-            ref Vector4 target = ref targetRow[column];
+            ref Vector4 target = ref Unsafe.Add(ref targetRowRef, column);
             vector.W = target.W;
+
             Vector4Utils.UnPremultiply(ref vector);
             target = vector;
         }
 
         /// <summary>
-        /// Computes the sum of vectors in <paramref name="targetRow"/> weighted by the two kernel weight values.
+        /// Computes the sum of vectors in the span referenced by <paramref name="targetRowRef"/> weighted by the two kernel weight values.
+        /// Using this method the convolution filter is applied to alpha in addition to the color channels.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="matrixY">The vertical dense matrix.</param>
         /// <param name="matrixX">The horizontal dense matrix.</param>
         /// <param name="sourcePixels">The source frame.</param>
-        /// <param name="targetRow">The target row.</param>
+        /// <param name="targetRowRef">The target row base reference.</param>
         /// <param name="row">The current row.</param>
         /// <param name="column">The current column.</param>
+        /// <param name="minRow">The minimum working area row.</param>
         /// <param name="maxRow">The maximum working area row.</param>
+        /// <param name="minColumn">The minimum working area column.</param>
         /// <param name="maxColumn">The maximum working area column.</param>
-        /// <param name="offsetColumn">The column offset to apply to source sampling.</param>
-        public static void Convolve2D<TPixel>(
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Convolve2D4<TPixel>(
             in DenseMatrix<float> matrixY,
             in DenseMatrix<float> matrixX,
             Buffer2D<TPixel> sourcePixels,
-            Span<Vector4> targetRow,
+            ref Vector4 targetRowRef,
             int row,
             int column,
+            int minRow,
             int maxRow,
+            int minColumn,
+            int maxColumn)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Vector4 vector = default;
+
+            Convolve2DImpl(
+                in matrixY,
+                in matrixX,
+                sourcePixels,
+                row,
+                column,
+                minRow,
+                maxRow,
+                minColumn,
+                maxColumn,
+                ref vector);
+
+            ref Vector4 target = ref Unsafe.Add(ref targetRowRef, column);
+            Vector4Utils.UnPremultiply(ref vector);
+            target = vector;
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Convolve2DImpl<TPixel>(
+            in DenseMatrix<float> matrixY,
+            in DenseMatrix<float> matrixX,
+            Buffer2D<TPixel> sourcePixels,
+            int row,
+            int column,
+            int minRow,
+            int maxRow,
+            int minColumn,
             int maxColumn,
-            int offsetColumn)
+            ref Vector4 vector)
             where TPixel : struct, IPixel<TPixel>
         {
             Vector4 vectorY = default;
@@ -96,16 +134,16 @@ namespace SixLabors.ImageSharp
             int matrixWidth = matrixY.Columns;
             int radiusY = matrixHeight >> 1;
             int radiusX = matrixWidth >> 1;
-            int sourceOffsetColumnBase = column + offsetColumn;
+            int sourceOffsetColumnBase = column + minColumn;
 
             for (int y = 0; y < matrixHeight; y++)
             {
-                int offsetY = (row + y - radiusY).Clamp(0, maxRow);
+                int offsetY = (row + y - radiusY).Clamp(minRow, maxRow);
                 Span<TPixel> sourceRowSpan = sourcePixels.GetRowSpan(offsetY);
 
                 for (int x = 0; x < matrixWidth; x++)
                 {
-                    int offsetX = (sourceOffsetColumnBase + x - radiusX).Clamp(offsetColumn, maxColumn);
+                    int offsetX = (sourceOffsetColumnBase + x - radiusX).Clamp(minColumn, maxColumn);
                     var currentColor = sourceRowSpan[offsetX].ToVector4();
                     Vector4Utils.Premultiply(ref currentColor);
 
@@ -114,11 +152,133 @@ namespace SixLabors.ImageSharp
                 }
             }
 
-            var vector = Vector4.SquareRoot((vectorX * vectorX) + (vectorY * vectorY));
-            ref Vector4 target = ref targetRow[column];
+            vector = Vector4.SquareRoot((vectorX * vectorX) + (vectorY * vectorY));
+        }
+
+        /// <summary>
+        /// Computes the sum of vectors in the span referenced by <paramref name="targetRowRef"/> weighted by the kernel weight values.
+        /// Using this method the convolution filter is not applied to alpha in addition to the color channels.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="matrix">The dense matrix.</param>
+        /// <param name="sourcePixels">The source frame.</param>
+        /// <param name="targetRowRef">The target row base reference.</param>
+        /// <param name="row">The current row.</param>
+        /// <param name="column">The current column.</param>
+        /// <param name="minRow">The minimum working area row.</param>
+        /// <param name="maxRow">The maximum working area row.</param>
+        /// <param name="minColumn">The minimum working area column.</param>
+        /// <param name="maxColumn">The maximum working area column.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Convolve3<TPixel>(
+            in DenseMatrix<float> matrix,
+            Buffer2D<TPixel> sourcePixels,
+            ref Vector4 targetRowRef,
+            int row,
+            int column,
+            int minRow,
+            int maxRow,
+            int minColumn,
+            int maxColumn)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Vector4 vector = default;
+
+            ConvolveImpl(
+                in matrix,
+                sourcePixels,
+                row,
+                column,
+                minRow,
+                maxRow,
+                minColumn,
+                maxColumn,
+                ref vector);
+
+            ref Vector4 target = ref Unsafe.Add(ref targetRowRef, column);
             vector.W = target.W;
+
             Vector4Utils.UnPremultiply(ref vector);
             target = vector;
         }
+
+        /// <summary>
+        /// Computes the sum of vectors in the span referenced by <paramref name="targetRowRef"/> weighted by the kernel weight values.
+        /// Using this method the convolution filter is applied to alpha in addition to the color channels.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="matrix">The dense matrix.</param>
+        /// <param name="sourcePixels">The source frame.</param>
+        /// <param name="targetRowRef">The target row base reference.</param>
+        /// <param name="row">The current row.</param>
+        /// <param name="column">The current column.</param>
+        /// <param name="minRow">The minimum working area row.</param>
+        /// <param name="maxRow">The maximum working area row.</param>
+        /// <param name="minColumn">The minimum working area column.</param>
+        /// <param name="maxColumn">The maximum working area column.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static void Convolve4<TPixel>(
+            in DenseMatrix<float> matrix,
+            Buffer2D<TPixel> sourcePixels,
+            ref Vector4 targetRowRef,
+            int row,
+            int column,
+            int minRow,
+            int maxRow,
+            int minColumn,
+            int maxColumn)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Vector4 vector = default;
+
+            ConvolveImpl(
+                in matrix,
+                sourcePixels,
+                row,
+                column,
+                minRow,
+                maxRow,
+                minColumn,
+                maxColumn,
+                ref vector);
+
+            ref Vector4 target = ref Unsafe.Add(ref targetRowRef, column);
+            Vector4Utils.UnPremultiply(ref vector);
+            target = vector;
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static void ConvolveImpl<TPixel>(
+            in DenseMatrix<float> matrix,
+            Buffer2D<TPixel> sourcePixels,
+            int row,
+            int column,
+            int minRow,
+            int maxRow,
+            int minColumn,
+            int maxColumn,
+            ref Vector4 vector)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            int matrixHeight = matrix.Rows;
+            int matrixWidth = matrix.Columns;
+            int radiusY = matrixHeight >> 1;
+            int radiusX = matrixWidth >> 1;
+            int sourceOffsetColumnBase = column + minColumn;
+
+            for (int y = 0; y < matrixHeight; y++)
+            {
+                int offsetY = (row + y - radiusY).Clamp(minRow, maxRow);
+                Span<TPixel> sourceRowSpan = sourcePixels.GetRowSpan(offsetY);
+
+                for (int x = 0; x < matrixWidth; x++)
+                {
+                    int offsetX = (sourceOffsetColumnBase + x - radiusX).Clamp(minColumn, maxColumn);
+                    var currentColor = sourceRowSpan[offsetX].ToVector4();
+                    Vector4Utils.Premultiply(ref currentColor);
+                    vector += matrix[y, x] * currentColor;
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
index 644d6c9e17..3d5bdc42a7 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
@@ -49,7 +49,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public DenseMatrix<float> KernelY { get; }
 
         /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration) => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY).Apply(source, sourceRectangle, configuration);
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
 
         /// <summary>
         /// Create a 1 dimensional Box kernel.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
index 341a26ae84..633b50a9b7 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Numerics;
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
@@ -23,11 +24,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         /// <param name="kernelX">The horizontal gradient operator.</param>
         /// <param name="kernelY">The vertical gradient operator.</param>
-        public Convolution2DProcessor(DenseMatrix<float> kernelX, DenseMatrix<float> kernelY)
+        /// <param name="preserveAlpha">Whether the convolution filter is applied to alpha as well as the color channels.</param>
+        public Convolution2DProcessor(in DenseMatrix<float> kernelX, in DenseMatrix<float> kernelY, bool preserveAlpha)
         {
             Guard.IsTrue(kernelX.Size.Equals(kernelY.Size), $"{nameof(kernelX)} {nameof(kernelY)}", "Kernel sizes must be the same.");
             this.KernelX = kernelX;
             this.KernelY = kernelY;
+            this.PreserveAlpha = preserveAlpha;
         }
 
         /// <summary>
@@ -40,6 +43,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         public DenseMatrix<float> KernelY { get; }
 
+        /// <summary>
+        /// Gets a value indicating whether the convolution filter is applied to alpha as well as the color channels.
+        /// </summary>
+        public bool PreserveAlpha { get; }
+
         /// <inheritdoc/>
         protected override void OnFrameApply(
             ImageFrame<TPixel> source,
@@ -48,6 +56,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             DenseMatrix<float> matrixY = this.KernelY;
             DenseMatrix<float> matrixX = this.KernelX;
+            bool preserveAlpha = this.PreserveAlpha;
 
             var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
             int startY = interest.Y;
@@ -71,18 +80,49 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                         {
                             Span<Vector4> vectorSpan = vectorBuffer.Span;
                             int length = vectorSpan.Length;
+                            ref Vector4 vectorSpanRef = ref MemoryMarshal.GetReference(vectorSpan);
 
                             for (int y = rows.Min; y < rows.Max; y++)
                             {
                                 Span<TPixel> targetRowSpan = targetPixels.GetRowSpan(y).Slice(startX);
                                 PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan.Slice(0, length), vectorSpan);
 
-                                for (int x = 0; x < width; x++)
+                                if (preserveAlpha)
+                                {
+                                    for (int x = 0; x < width; x++)
+                                    {
+                                        DenseMatrixUtils.Convolve2D3(
+                                            in matrixY,
+                                            in matrixX,
+                                            source.PixelBuffer,
+                                            ref vectorSpanRef,
+                                            y,
+                                            x,
+                                            startY,
+                                            maxY,
+                                            startX,
+                                            maxX);
+                                    }
+                                }
+                                else
                                 {
-                                    DenseMatrixUtils.Convolve2D(in matrixY, in matrixX, source.PixelBuffer, vectorSpan, y, x, maxY, maxX, startX);
+                                    for (int x = 0; x < width; x++)
+                                    {
+                                        DenseMatrixUtils.Convolve2D4(
+                                            in matrixY,
+                                            in matrixX,
+                                            source.PixelBuffer,
+                                            ref vectorSpanRef,
+                                            y,
+                                            x,
+                                            startY,
+                                            maxY,
+                                            startX,
+                                            maxX);
+                                    }
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
                             }
                         });
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
index 9de4673289..03268c9dda 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
@@ -3,7 +3,7 @@
 
 using System;
 using System.Numerics;
-
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
@@ -24,10 +24,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         /// <param name="kernelX">The horizontal gradient operator.</param>
         /// <param name="kernelY">The vertical gradient operator.</param>
-        public Convolution2PassProcessor(DenseMatrix<float> kernelX, DenseMatrix<float> kernelY)
+        /// <param name="preserveAlpha">Whether the convolution filter is applied to alpha as well as the color channels.</param>
+        public Convolution2PassProcessor(
+            in DenseMatrix<float> kernelX,
+            in DenseMatrix<float> kernelY,
+            bool preserveAlpha)
         {
             this.KernelX = kernelX;
             this.KernelY = kernelY;
+            this.PreserveAlpha = preserveAlpha;
         }
 
         /// <summary>
@@ -40,13 +45,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         public DenseMatrix<float> KernelY { get; }
 
+        /// <summary>
+        /// Gets a value indicating whether the convolution filter is applied to alpha as well as the color channels.
+        /// </summary>
+        public bool PreserveAlpha { get; }
+
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
             using (Buffer2D<TPixel> firstPassPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Size()))
             {
-                source.CopyTo(firstPassPixels);
-
                 var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
                 this.ApplyConvolution(firstPassPixels, source.PixelBuffer, interest, this.KernelX, configuration);
                 this.ApplyConvolution(source.PixelBuffer, firstPassPixels, interest, this.KernelY, configuration);
@@ -72,6 +80,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
             Configuration configuration)
         {
             DenseMatrix<float> matrix = kernel;
+            bool preserveAlpha = this.PreserveAlpha;
+
             int startY = sourceRectangle.Y;
             int endY = sourceRectangle.Bottom;
             int startX = sourceRectangle.X;
@@ -89,18 +99,47 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                     {
                         Span<Vector4> vectorSpan = vectorBuffer.Span;
                         int length = vectorSpan.Length;
+                        ref Vector4 vectorSpanRef = ref MemoryMarshal.GetReference(vectorSpan);
 
                         for (int y = rows.Min; y < rows.Max; y++)
                         {
                             Span<TPixel> targetRowSpan = targetPixels.GetRowSpan(y).Slice(startX);
                             PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan.Slice(0, length), vectorSpan);
 
-                            for (int x = 0; x < width; x++)
+                            if (preserveAlpha)
+                            {
+                                for (int x = 0; x < width; x++)
+                                {
+                                    DenseMatrixUtils.Convolve3(
+                                        in matrix,
+                                        sourcePixels,
+                                        ref vectorSpanRef,
+                                        y,
+                                        x,
+                                        startY,
+                                        maxY,
+                                        startX,
+                                        maxX);
+                                }
+                            }
+                            else
                             {
-                                DenseMatrixUtils.Convolve(in matrix, sourcePixels, vectorSpan, y, x, maxY, maxX, startX);
+                                for (int x = 0; x < width; x++)
+                                {
+                                    DenseMatrixUtils.Convolve4(
+                                        in matrix,
+                                        sourcePixels,
+                                        ref vectorSpanRef,
+                                        y,
+                                        x,
+                                        startY,
+                                        maxY,
+                                        startX,
+                                        maxX);
+                                }
                             }
 
-                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
                         }
                     });
         }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
index 7e003cb03e..6c3b9a46f5 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Numerics;
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
@@ -22,17 +23,29 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// Initializes a new instance of the <see cref="ConvolutionProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="kernelXY">The 2d gradient operator.</param>
-        public ConvolutionProcessor(DenseMatrix<float> kernelXY) => this.KernelXY = kernelXY;
+        /// <param name="preserveAlpha">Whether the convolution filter is applied to alpha as well as the color channels.</param>
+        public ConvolutionProcessor(in DenseMatrix<float> kernelXY, bool preserveAlpha)
+        {
+            this.KernelXY = kernelXY;
+            this.PreserveAlpha = preserveAlpha;
+        }
 
         /// <summary>
         /// Gets the 2d gradient operator.
         /// </summary>
         public DenseMatrix<float> KernelXY { get; }
 
+        /// <summary>
+        /// Gets a value indicating whether the convolution filter is applied to alpha as well as the color channels.
+        /// </summary>
+        public bool PreserveAlpha { get; }
+
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
             DenseMatrix<float> matrix = this.KernelXY;
+            bool preserveAlpha = this.PreserveAlpha;
+
             var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
             int startY = interest.Y;
             int endY = interest.Bottom;
@@ -55,18 +68,47 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                         {
                             Span<Vector4> vectorSpan = vectorBuffer.Span;
                             int length = vectorSpan.Length;
+                            ref Vector4 vectorSpanRef = ref MemoryMarshal.GetReference(vectorSpan);
 
                             for (int y = rows.Min; y < rows.Max; y++)
                             {
                                 Span<TPixel> targetRowSpan = targetPixels.GetRowSpan(y).Slice(startX);
                                 PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan.Slice(0, length), vectorSpan);
 
-                                for (int x = 0; x < width; x++)
+                                if (preserveAlpha)
+                                {
+                                    for (int x = 0; x < width; x++)
+                                    {
+                                        DenseMatrixUtils.Convolve3(
+                                            in matrix,
+                                            source.PixelBuffer,
+                                            ref vectorSpanRef,
+                                            y,
+                                            x,
+                                            startY,
+                                            maxY,
+                                            startX,
+                                            maxX);
+                                    }
+                                }
+                                else
                                 {
-                                    DenseMatrixUtils.Convolve(in matrix, source.PixelBuffer, vectorSpan, y, x, maxY, maxX, startX);
+                                    for (int x = 0; x < width; x++)
+                                    {
+                                        DenseMatrixUtils.Convolve4(
+                                            in matrix,
+                                            source.PixelBuffer,
+                                            ref vectorSpanRef,
+                                            y,
+                                            x,
+                                            startY,
+                                            maxY,
+                                            startX,
+                                            maxX);
+                                    }
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan.Slice(0, length), targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
                             }
                         });
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index 8927716492..d2e9630dc0 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <param name="kernelX">The horizontal gradient operator.</param>
         /// <param name="kernelY">The vertical gradient operator.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetector2DProcessor(DenseMatrix<float> kernelX, DenseMatrix<float> kernelY, bool grayscale)
+        protected EdgeDetector2DProcessor(in DenseMatrix<float> kernelX, in DenseMatrix<float> kernelY, bool grayscale)
         {
             Guard.IsTrue(kernelX.Size.Equals(kernelY.Size), $"{nameof(kernelX)} {nameof(kernelY)}", "Kernel sizes must be the same.");
             this.KernelX = kernelX;
@@ -43,7 +43,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public bool Grayscale { get; set; }
 
         /// <inheritdoc />
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration) => new Convolution2DProcessor<TPixel>(this.KernelX, this.KernelY).Apply(source, sourceRectangle, configuration);
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+            => new Convolution2DProcessor<TPixel>(this.KernelX, this.KernelY, true).Apply(source, sourceRectangle, configuration);
 
         /// <inheritdoc/>
         protected override void BeforeFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
index 4165cf024e..73f92fae38 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
@@ -5,14 +5,12 @@ using System;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-using System.Threading.Tasks;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing.Processors.Filters;
-using SixLabors.Memory;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
@@ -28,10 +26,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// Initializes a new instance of the <see cref="EdgeDetectorCompassProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetectorCompassProcessor(bool grayscale)
-        {
-            this.Grayscale = grayscale;
-        }
+        protected EdgeDetectorCompassProcessor(bool grayscale) => this.Grayscale = grayscale;
 
         /// <summary>
         /// Gets the North gradient operator
@@ -104,7 +99,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
             // we need a clean copy for each pass to start from
             using (ImageFrame<TPixel> cleanCopy = source.Clone())
             {
-                new ConvolutionProcessor<TPixel>(kernels[0]).Apply(source, sourceRectangle, configuration);
+                new ConvolutionProcessor<TPixel>(kernels[0], true).Apply(source, sourceRectangle, configuration);
 
                 if (kernels.Length == 1)
                 {
@@ -133,7 +128,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                 {
                     using (ImageFrame<TPixel> pass = cleanCopy.Clone())
                     {
-                        new ConvolutionProcessor<TPixel>(kernels[i]).Apply(pass, sourceRectangle, configuration);
+                        new ConvolutionProcessor<TPixel>(kernels[i], true).Apply(pass, sourceRectangle, configuration);
 
                         Buffer2D<TPixel> passPixels = pass.PixelBuffer;
                         Buffer2D<TPixel> targetPixels = source.PixelBuffer;
@@ -147,10 +142,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                                     {
                                         int offsetY = y - shiftY;
 
-                                        ref TPixel passPixelsBase =
-                                            ref MemoryMarshal.GetReference(passPixels.GetRowSpan(offsetY));
-                                        ref TPixel targetPixelsBase =
-                                            ref MemoryMarshal.GetReference(targetPixels.GetRowSpan(offsetY));
+                                        ref TPixel passPixelsBase = ref MemoryMarshal.GetReference(passPixels.GetRowSpan(offsetY));
+                                        ref TPixel targetPixelsBase = ref MemoryMarshal.GetReference(targetPixels.GetRowSpan(offsetY));
 
                                         for (int x = minX; x < maxX; x++)
                                         {
@@ -158,8 +151,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 
                                             // Grab the max components of the two pixels
                                             ref TPixel currentPassPixel = ref Unsafe.Add(ref passPixelsBase, offsetX);
-                                            ref TPixel currentTargetPixel =
-                                                ref Unsafe.Add(ref targetPixelsBase, offsetX);
+                                            ref TPixel currentTargetPixel = ref Unsafe.Add(ref targetPixelsBase, offsetX);
 
                                             var pixelValue = Vector4.Max(
                                                 currentPassPixel.ToVector4(),
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
index 9173bc229b..edc7ec4ccd 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         /// <param name="kernelXY">The 2d gradient operator.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetectorProcessor(DenseMatrix<float> kernelXY, bool grayscale)
+        protected EdgeDetectorProcessor(in DenseMatrix<float> kernelXY, bool grayscale)
         {
             this.KernelXY = kernelXY;
             this.Grayscale = grayscale;
@@ -45,8 +45,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            new ConvolutionProcessor<TPixel>(this.KernelXY).Apply(source, sourceRectangle, configuration);
-        }
+            => new ConvolutionProcessor<TPixel>(this.KernelXY, true).Apply(source, sourceRectangle, configuration);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
index b3bc15d391..0fc822d57c 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
@@ -77,7 +77,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY).Apply(source, sourceRectangle, configuration);
+            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
 
         /// <summary>
         /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
index 786bf7757a..001471720a 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY).Apply(source, sourceRectangle, configuration);
+            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
 
         /// <summary>
         /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
index 642da2f001..abf5dce184 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// </summary>
         /// <param name="matrix">The dithering matrix.</param>
         /// <param name="divisor">The divisor.</param>
-        internal ErrorDiffuserBase(DenseMatrix<float> matrix, byte divisor)
+        internal ErrorDiffuserBase(in DenseMatrix<float> matrix, byte divisor)
         {
             Guard.MustBeGreaterThan(divisor, 0, nameof(divisor));
 
diff --git a/tests/ImageSharp.Benchmarks/Samplers/GaussianBlur.cs b/tests/ImageSharp.Benchmarks/Samplers/GaussianBlur.cs
new file mode 100644
index 0000000000..47bd42a3c2
--- /dev/null
+++ b/tests/ImageSharp.Benchmarks/Samplers/GaussianBlur.cs
@@ -0,0 +1,19 @@
+using BenchmarkDotNet.Attributes;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+
+namespace SixLabors.ImageSharp.Benchmarks.Samplers
+{
+    [Config(typeof(Config.ShortClr))]
+    public class GaussianBlur
+    {
+        [Benchmark]
+        public void Blur()
+        {
+            using (var image = new Image<Rgba32>(Configuration.Default, 400, 400, Rgba32.White))
+            {
+                image.Mutate(c => c.GaussianBlur());
+            }
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
index b43c17f791..0882222226 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/ICC/DataWriter/IccDataWriter.MatrixTests.cs
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Tests.Icc
 
         [Theory]
         [MemberData(nameof(IccTestDataMatrix.Matrix2D_DenseMatrixTestData), MemberType = typeof(IccTestDataMatrix))]
-        internal void WriteMatrix2D_DenseMatrix(byte[] expected, int xCount, int yCount, bool isSingle, DenseMatrix<float> data)
+        internal void WriteMatrix2D_DenseMatrix(byte[] expected, int xCount, int yCount, bool isSingle, in DenseMatrix<float> data)
         {
             IccDataWriter writer = CreateWriter();
 
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
index 0c40debad1..1f0d12cf7f 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
+            using (Image<TPixel> image = source.Clone())
             {
                 var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
 
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
index edb24d6f10..b6a7741b3c 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
@@ -12,6 +12,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
     public class DetectEdgesTest : FileTestBase
     {
+        // I think our comparison is not accurate enough (nor can be) for RgbaVector.
+        // The image pixels are identical according to BeyondCompare.
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.0456F);
 
         public static readonly string[] CommonTestImages = { TestImages.Png.Bike };

From b5ad111eac9106ed3c247a30ba43b4d44fbe52fc Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 26 Apr 2019 09:09:20 +1000
Subject: [PATCH 094/223] Faster Jpeg Huffman Decoding. (#894)

* Read from underlying stream less often

* Update benchmark dependencies

* Experimental mango port

Currently broken

* Populate table, 64byte buffer

Still broken.

* Baseline, non RST works

* 15/19 baseline tests pass now.

* Optimize position change.

* 18/19 pass

* 19/19 baseline decoded

* Can now decode all images.

* Now faster and much cleaner.

* Cleanup

* Fix reader, update benchmarks

* Update dependencies

* Remove unused method

* No need to clean initial buffer

* Remove bounds check on ReadByte()

* Refactor from feedback
---
 .../ImageSharp.Drawing.csproj                 |    2 +-
 .../Jpeg/Components/Decoder/FastACTable.cs    |   61 -
 .../Components/Decoder/HuffmanScanBuffer.cs   |  188 +++
 .../Components/Decoder/HuffmanScanDecoder.cs  |  694 +++++++++++
 .../Jpeg/Components/Decoder/HuffmanTable.cs   |  172 +--
 .../Jpeg/Components/Decoder/ScanDecoder.cs    | 1058 -----------------
 src/ImageSharp/Formats/Jpeg/JpegConstants.cs  |   31 +-
 .../Formats/Jpeg/JpegDecoderCore.cs           |   10 +-
 .../Formats/Jpeg/JpegThrowHelper.cs           |    3 -
 .../IO/DoubleBufferedStreamReader.cs          |  115 +-
 src/ImageSharp/ImageSharp.csproj              |    4 +-
 .../Codecs/Jpeg/DecodeJpegParseStreamOnly.cs  |   17 +
 .../Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs   |   25 +-
 .../Codecs/Jpeg/DoubleBufferedStreams.cs      |   42 +-
 .../Codecs/MultiImageBenchmarkBase.cs         |    2 +-
 .../ImageSharp.Benchmarks.csproj              |    2 +-
 .../ImageSharp.Tests/ImageSharp.Tests.csproj  |    4 +-
 17 files changed, 1160 insertions(+), 1270 deletions(-)
 delete mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
 create mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
 create mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
 delete mode 100644 src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 638687ae55..6f5cabb09b 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -39,7 +39,7 @@
     <AdditionalFiles Include="..\..\standards\stylecop.json" />
     <PackageReference Include="SixLabors.Fonts" Version="1.0.0-beta0008" />
     <PackageReference Include="SixLabors.Shapes" Version="1.0.0-beta0008" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-beta.61" PrivateAssets="All" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-rc.114" PrivateAssets="All" />
   </ItemGroup>
 
   <PropertyGroup>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
deleted file mode 100644
index dc78a89ddb..0000000000
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/FastACTable.cs
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Runtime.CompilerServices;
-
-namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
-{
-    internal unsafe struct FastACTable
-    {
-        /// <summary>
-        /// Gets the lookahead array.
-        /// </summary>
-        public fixed short Lookahead[512];
-
-        /// <summary>
-        /// Derives a lookup table for fast AC entropy scan decoding.
-        /// This can happen multiple times during progressive decoding but always outside mcu loops.
-        /// </summary>
-        /// <param name="huffmanTable">The AC Huffman table.</param>
-        public void Derive(ref HuffmanTable huffmanTable)
-        {
-            const int FastBits = ScanDecoder.FastBits;
-            ref short fastACRef = ref this.Lookahead[0];
-            ref byte huffmanLookaheadRef = ref huffmanTable.Lookahead[0];
-            ref byte huffmanValuesRef = ref huffmanTable.Values[0];
-            ref short huffmanSizesRef = ref huffmanTable.Sizes[0];
-
-            int i;
-            for (i = 0; i < (1 << FastBits); i++)
-            {
-                byte fast = Unsafe.Add(ref huffmanLookaheadRef, i);
-                Unsafe.Add(ref fastACRef, i) = 0;
-
-                if (fast < byte.MaxValue)
-                {
-                    int rs = Unsafe.Add(ref huffmanValuesRef, fast);
-                    int run = (rs >> 4) & 15;
-                    int magbits = rs & 15;
-                    int len = Unsafe.Add(ref huffmanSizesRef, fast);
-
-                    if (magbits != 0 && len + magbits <= FastBits)
-                    {
-                        // Magnitude code followed by receive_extend code
-                        int k = ((i << len) & ((1 << FastBits) - 1)) >> (FastBits - magbits);
-                        int m = 1 << (magbits - 1);
-                        if (k < m)
-                        {
-                            k += (int)((~0U << magbits) + 1);
-                        }
-
-                        // If the result is small enough, we can fit it in fastAC table
-                        if (k >= -128 && k <= 127)
-                        {
-                            Unsafe.Add(ref fastACRef, i) = (short)((k << 8) + (run << 4) + (len + magbits));
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
new file mode 100644
index 0000000000..72bfa38646
--- /dev/null
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
@@ -0,0 +1,188 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Runtime.CompilerServices;
+using SixLabors.ImageSharp.IO;
+
+namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
+{
+    /// <summary>
+    /// Used to buffer and track the bits read from the Huffman entropy encoded data.
+    /// </summary>
+    internal struct HuffmanScanBuffer
+    {
+        private readonly DoubleBufferedStreamReader stream;
+
+        // The entropy encoded code buffer.
+        private ulong data;
+
+        // The number of valid bits left to read in the buffer.
+        private int remain;
+
+        // Whether there is more data to pull from the stream for the current mcu.
+        private bool noMore;
+
+        public HuffmanScanBuffer(DoubleBufferedStreamReader stream)
+        {
+            this.stream = stream;
+            this.data = 0ul;
+            this.remain = 0;
+            this.Marker = JpegConstants.Markers.XFF;
+            this.MarkerPosition = 0;
+            this.BadMarker = false;
+            this.noMore = false;
+            this.Eof = false;
+        }
+
+        /// <summary>
+        /// Gets or sets the current, if any, marker in the input stream.
+        /// </summary>
+        public byte Marker { get; set; }
+
+        /// <summary>
+        /// Gets or sets the opening position of an identified marker.
+        /// </summary>
+        public long MarkerPosition { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether we have a bad marker, I.E. One that is not between RST0 and RST7
+        /// </summary>
+        public bool BadMarker { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether we have prematurely reached the end of the file.
+        /// </summary>
+        public bool Eof { get; set; }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void CheckBits()
+        {
+            if (this.remain < 16)
+            {
+                this.FillBuffer();
+            }
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void Reset()
+        {
+            this.data = 0ul;
+            this.remain = 0;
+            this.Marker = JpegConstants.Markers.XFF;
+            this.MarkerPosition = 0;
+            this.BadMarker = false;
+            this.noMore = false;
+            this.Eof = false;
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public bool HasRestart()
+        {
+            byte m = this.Marker;
+            return m >= JpegConstants.Markers.RST0 && m <= JpegConstants.Markers.RST7;
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FillBuffer()
+        {
+            // Attempt to load at least the minimum number of required bits into the buffer.
+            // We fail to do so only if we hit a marker or reach the end of the input stream.
+            this.remain += 48;
+            this.data = (this.data << 48) | this.GetBytes();
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public unsafe int DecodeHuffman(ref HuffmanTable h)
+        {
+            this.CheckBits();
+            int v = this.PeekBits(JpegConstants.Huffman.LookupBits);
+            int symbol = h.LookaheadValue[v];
+            int size = h.LookaheadSize[v];
+
+            if (size == JpegConstants.Huffman.SlowBits)
+            {
+                ulong x = this.data << (JpegConstants.Huffman.RegisterSize - this.remain);
+                while (x > h.MaxCode[size])
+                {
+                    size++;
+                }
+
+                v = (int)(x >> (JpegConstants.Huffman.RegisterSize - size));
+                symbol = h.Values[h.ValOffset[size] + v];
+            }
+
+            this.remain -= size;
+
+            return symbol;
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public int Receive(int nbits)
+        {
+            this.CheckBits();
+            return Extend(this.GetBits(nbits), nbits);
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public int GetBits(int nbits) => (int)ExtractBits(this.data, this.remain -= nbits, nbits);
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public int PeekBits(int nbits) => (int)ExtractBits(this.data, this.remain - nbits, nbits);
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static ulong ExtractBits(ulong value, int offset, int size) => (value >> offset) & (ulong)((1 << size) - 1);
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static int Extend(int v, int nbits) => v - ((((v + v) >> nbits) - 1) & ((1 << nbits) - 1));
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private ulong GetBytes()
+        {
+            ulong temp = 0;
+            for (int i = 0; i < 6; i++)
+            {
+                int b = this.noMore ? 0 : this.stream.ReadByte();
+
+                if (b == -1)
+                {
+                    // We've encountered the end of the file stream which means there's no EOI marker in the image
+                    // or the SOS marker has the wrong dimensions set.
+                    this.Eof = true;
+                    b = 0;
+                }
+
+                // Found a marker.
+                if (b == JpegConstants.Markers.XFF)
+                {
+                    this.MarkerPosition = this.stream.Position - 1;
+                    int c = this.stream.ReadByte();
+                    while (c == JpegConstants.Markers.XFF)
+                    {
+                        c = this.stream.ReadByte();
+
+                        if (c == -1)
+                        {
+                            this.Eof = true;
+                            c = 0;
+                            break;
+                        }
+                    }
+
+                    if (c != 0)
+                    {
+                        this.Marker = (byte)c;
+                        this.noMore = true;
+                        if (!this.HasRestart())
+                        {
+                            this.BadMarker = true;
+                        }
+                    }
+                }
+
+                temp = (temp << 8) | (ulong)(long)b;
+            }
+
+            return temp;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
new file mode 100644
index 0000000000..76fea92976
--- /dev/null
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
@@ -0,0 +1,694 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using SixLabors.ImageSharp.IO;
+using SixLabors.ImageSharp.Memory;
+
+namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
+{
+    /// <summary>
+    /// Decodes the Huffman encoded spectral scan.
+    /// Originally ported from <see href="https://github.com/t0rakka/mango"/>
+    /// with additional fixes for both performance and common encoding errors.
+    /// </summary>
+    internal class HuffmanScanDecoder
+    {
+        private readonly JpegFrame frame;
+        private readonly HuffmanTable[] dcHuffmanTables;
+        private readonly HuffmanTable[] acHuffmanTables;
+        private readonly DoubleBufferedStreamReader stream;
+        private readonly JpegComponent[] components;
+
+        // The restart interval.
+        private readonly int restartInterval;
+
+        // The number of interleaved components.
+        private readonly int componentsLength;
+
+        // The spectral selection start.
+        private readonly int spectralStart;
+
+        // The spectral selection end.
+        private readonly int spectralEnd;
+
+        // The successive approximation high bit end.
+        private readonly int successiveHigh;
+
+        // The successive approximation low bit end.
+        private readonly int successiveLow;
+
+        // How many mcu's are left to do.
+        private int todo;
+
+        // The End-Of-Block countdown for ending the sequence prematurely when the remaining coefficients are zero.
+        private int eobrun;
+
+        // The unzig data.
+        private ZigZag dctZigZag;
+
+        private HuffmanScanBuffer scanBuffer;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HuffmanScanDecoder"/> class.
+        /// </summary>
+        /// <param name="stream">The input stream.</param>
+        /// <param name="frame">The image frame.</param>
+        /// <param name="dcHuffmanTables">The DC Huffman tables.</param>
+        /// <param name="acHuffmanTables">The AC Huffman tables.</param>
+        /// <param name="componentsLength">The length of the components. Different to the array length.</param>
+        /// <param name="restartInterval">The reset interval.</param>
+        /// <param name="spectralStart">The spectral selection start.</param>
+        /// <param name="spectralEnd">The spectral selection end.</param>
+        /// <param name="successiveHigh">The successive approximation bit high end.</param>
+        /// <param name="successiveLow">The successive approximation bit low end.</param>
+        public HuffmanScanDecoder(
+            DoubleBufferedStreamReader stream,
+            JpegFrame frame,
+            HuffmanTable[] dcHuffmanTables,
+            HuffmanTable[] acHuffmanTables,
+            int componentsLength,
+            int restartInterval,
+            int spectralStart,
+            int spectralEnd,
+            int successiveHigh,
+            int successiveLow)
+        {
+            this.dctZigZag = ZigZag.CreateUnzigTable();
+            this.stream = stream;
+            this.scanBuffer = new HuffmanScanBuffer(stream);
+            this.frame = frame;
+            this.dcHuffmanTables = dcHuffmanTables;
+            this.acHuffmanTables = acHuffmanTables;
+            this.components = frame.Components;
+            this.componentsLength = componentsLength;
+            this.restartInterval = restartInterval;
+            this.todo = restartInterval;
+            this.spectralStart = spectralStart;
+            this.spectralEnd = spectralEnd;
+            this.successiveHigh = successiveHigh;
+            this.successiveLow = successiveLow;
+        }
+
+        /// <summary>
+        /// Decodes the entropy coded data.
+        /// </summary>
+        public void ParseEntropyCodedData()
+        {
+            if (!this.frame.Progressive)
+            {
+                this.ParseBaselineData();
+            }
+            else
+            {
+                this.ParseProgressiveData();
+            }
+
+            if (this.scanBuffer.BadMarker)
+            {
+                this.stream.Position = this.scanBuffer.MarkerPosition;
+            }
+        }
+
+        private void ParseBaselineData()
+        {
+            if (this.componentsLength == 1)
+            {
+                this.ParseBaselineDataNonInterleaved();
+            }
+            else
+            {
+                this.ParseBaselineDataInterleaved();
+            }
+        }
+
+        private unsafe void ParseBaselineDataInterleaved()
+        {
+            // Interleaved
+            int mcu = 0;
+            int mcusPerColumn = this.frame.McusPerColumn;
+            int mcusPerLine = this.frame.McusPerLine;
+
+            // Pre-derive the huffman table to avoid in-loop checks.
+            for (int i = 0; i < this.componentsLength; i++)
+            {
+                int order = this.frame.ComponentOrder[i];
+                JpegComponent component = this.components[order];
+
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+                dcHuffmanTable.Configure();
+                acHuffmanTable.Configure();
+            }
+
+            for (int j = 0; j < mcusPerColumn; j++)
+            {
+                for (int i = 0; i < mcusPerLine; i++)
+                {
+                    // Scan an interleaved mcu... process components in order
+                    int mcuRow = mcu / mcusPerLine;
+                    int mcuCol = mcu % mcusPerLine;
+                    for (int k = 0; k < this.componentsLength; k++)
+                    {
+                        int order = this.frame.ComponentOrder[k];
+                        JpegComponent component = this.components[order];
+
+                        ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                        ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+
+                        int h = component.HorizontalSamplingFactor;
+                        int v = component.VerticalSamplingFactor;
+
+                        // Scan out an mcu's worth of this component; that's just determined
+                        // by the basic H and V specified for the component
+                        for (int y = 0; y < v; y++)
+                        {
+                            int blockRow = (mcuRow * v) + y;
+                            Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                            for (int x = 0; x < h; x++)
+                            {
+                                int blockCol = (mcuCol * h) + x;
+
+                                this.DecodeBlockBaseline(
+                                    component,
+                                    ref Unsafe.Add(ref blockRef, blockCol),
+                                    ref dcHuffmanTable,
+                                    ref acHuffmanTable);
+                            }
+                        }
+                    }
+
+                    // After all interleaved components, that's an interleaved MCU,
+                    // so now count down the restart interval
+                    mcu++;
+                    this.HandleRestart();
+                }
+            }
+        }
+
+        private unsafe void ParseBaselineDataNonInterleaved()
+        {
+            JpegComponent component = this.components[this.frame.ComponentOrder[0]];
+
+            int w = component.WidthInBlocks;
+            int h = component.HeightInBlocks;
+
+            ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+            ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+            dcHuffmanTable.Configure();
+            acHuffmanTable.Configure();
+
+            int mcu = 0;
+            for (int j = 0; j < h; j++)
+            {
+                Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                for (int i = 0; i < w; i++)
+                {
+                    this.DecodeBlockBaseline(
+                        component,
+                        ref Unsafe.Add(ref blockRef, i),
+                        ref dcHuffmanTable,
+                        ref acHuffmanTable);
+
+                    // Every data block is an MCU, so countdown the restart interval
+                    mcu++;
+
+                    this.HandleRestart();
+                }
+            }
+        }
+
+        private void CheckProgressiveData()
+        {
+            // Validate successive scan parameters.
+            // Logic has been adapted from libjpeg.
+            // See Table B.3 – Scan header parameter size and values. itu-t81.pdf
+            bool invalid = false;
+            if (this.spectralStart == 0)
+            {
+                if (this.spectralEnd != 0)
+                {
+                    invalid = true;
+                }
+            }
+            else
+            {
+                // Need not check Ss/Se < 0 since they came from unsigned bytes.
+                if (this.spectralEnd < this.spectralStart || this.spectralEnd > 63)
+                {
+                    invalid = true;
+                }
+
+                // AC scans may have only one component.
+                if (this.componentsLength != 1)
+                {
+                    invalid = true;
+                }
+            }
+
+            if (this.successiveHigh != 0)
+            {
+                // Successive approximation refinement scan: must have Al = Ah-1.
+                if (this.successiveHigh - 1 != this.successiveLow)
+                {
+                    invalid = true;
+                }
+            }
+
+            // TODO: How does this affect 12bit jpegs.
+            // According to libjpeg the range covers 8bit only?
+            if (this.successiveLow > 13)
+            {
+                invalid = true;
+            }
+
+            if (invalid)
+            {
+                JpegThrowHelper.ThrowBadProgressiveScan(this.spectralStart, this.spectralEnd, this.successiveHigh, this.successiveLow);
+            }
+        }
+
+        private void ParseProgressiveData()
+        {
+            this.CheckProgressiveData();
+
+            if (this.componentsLength == 1)
+            {
+                this.ParseProgressiveDataNonInterleaved();
+            }
+            else
+            {
+                this.ParseProgressiveDataInterleaved();
+            }
+        }
+
+        private void ParseProgressiveDataInterleaved()
+        {
+            // Interleaved
+            int mcu = 0;
+            int mcusPerColumn = this.frame.McusPerColumn;
+            int mcusPerLine = this.frame.McusPerLine;
+
+            // Pre-derive the huffman table to avoid in-loop checks.
+            for (int k = 0; k < this.componentsLength; k++)
+            {
+                int order = this.frame.ComponentOrder[k];
+                JpegComponent component = this.components[order];
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                dcHuffmanTable.Configure();
+            }
+
+            for (int j = 0; j < mcusPerColumn; j++)
+            {
+                for (int i = 0; i < mcusPerLine; i++)
+                {
+                    // Scan an interleaved mcu... process components in order
+                    int mcuRow = mcu / mcusPerLine;
+                    int mcuCol = mcu % mcusPerLine;
+                    for (int k = 0; k < this.componentsLength; k++)
+                    {
+                        int order = this.frame.ComponentOrder[k];
+                        JpegComponent component = this.components[order];
+                        ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                        ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+
+                        int h = component.HorizontalSamplingFactor;
+                        int v = component.VerticalSamplingFactor;
+
+                        // Scan out an mcu's worth of this component; that's just determined
+                        // by the basic H and V specified for the component
+                        for (int y = 0; y < v; y++)
+                        {
+                            int blockRow = (mcuRow * v) + y;
+                            Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
+                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                            for (int x = 0; x < h; x++)
+                            {
+                                if (buffer.Eof)
+                                {
+                                    return;
+                                }
+
+                                int blockCol = (mcuCol * h) + x;
+
+                                this.DecodeBlockProgressiveDC(
+                                    component,
+                                    ref Unsafe.Add(ref blockRef, blockCol),
+                                    ref dcHuffmanTable);
+                            }
+                        }
+                    }
+
+                    // After all interleaved components, that's an interleaved MCU,
+                    // so now count down the restart interval
+                    mcu++;
+                    this.HandleRestart();
+                }
+            }
+        }
+
+        private unsafe void ParseProgressiveDataNonInterleaved()
+        {
+            JpegComponent component = this.components[this.frame.ComponentOrder[0]];
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+
+            int w = component.WidthInBlocks;
+            int h = component.HeightInBlocks;
+
+            if (this.spectralStart == 0)
+            {
+                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
+                dcHuffmanTable.Configure();
+
+                int mcu = 0;
+                for (int j = 0; j < h; j++)
+                {
+                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                    for (int i = 0; i < w; i++)
+                    {
+                        if (buffer.Eof)
+                        {
+                            return;
+                        }
+
+                        this.DecodeBlockProgressiveDC(
+                            component,
+                            ref Unsafe.Add(ref blockRef, i),
+                            ref dcHuffmanTable);
+
+                        // Every data block is an MCU, so countdown the restart interval
+                        mcu++;
+                        this.HandleRestart();
+                    }
+                }
+            }
+            else
+            {
+                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
+                acHuffmanTable.Configure();
+
+                int mcu = 0;
+                for (int j = 0; j < h; j++)
+                {
+                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
+                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
+
+                    for (int i = 0; i < w; i++)
+                    {
+                        if (buffer.Eof)
+                        {
+                            return;
+                        }
+
+                        this.DecodeBlockProgressiveAC(
+                            ref Unsafe.Add(ref blockRef, i),
+                            ref acHuffmanTable);
+
+                        // Every data block is an MCU, so countdown the restart interval
+                        mcu++;
+                        this.HandleRestart();
+                    }
+                }
+            }
+        }
+
+        private void DecodeBlockBaseline(
+            JpegComponent component,
+            ref Block8x8 block,
+            ref HuffmanTable dcTable,
+            ref HuffmanTable acTable)
+        {
+            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+            ref ZigZag zigzag = ref this.dctZigZag;
+
+            // DC
+            int t = buffer.DecodeHuffman(ref dcTable);
+            if (t != 0)
+            {
+                t = buffer.Receive(t);
+            }
+
+            t += component.DcPredictor;
+            component.DcPredictor = t;
+            blockDataRef = (short)t;
+
+            // AC
+            for (int i = 1; i < 64;)
+            {
+                int s = buffer.DecodeHuffman(ref acTable);
+
+                int r = s >> 4;
+                s &= 15;
+
+                if (s != 0)
+                {
+                    i += r;
+                    s = buffer.Receive(s);
+                    Unsafe.Add(ref blockDataRef, zigzag[i++]) = (short)s;
+                }
+                else
+                {
+                    if (r == 0)
+                    {
+                        break;
+                    }
+
+                    i += 16;
+                }
+            }
+        }
+
+        private void DecodeBlockProgressiveDC(JpegComponent component, ref Block8x8 block, ref HuffmanTable dcTable)
+        {
+            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+
+            if (this.successiveHigh == 0)
+            {
+                // First scan for DC coefficient, must be first
+                int s = buffer.DecodeHuffman(ref dcTable);
+                if (s != 0)
+                {
+                    s = buffer.Receive(s);
+                }
+
+                s += component.DcPredictor;
+                component.DcPredictor = s;
+                blockDataRef = (short)(s << this.successiveLow);
+            }
+            else
+            {
+                // Refinement scan for DC coefficient
+                buffer.CheckBits();
+                blockDataRef |= (short)(buffer.GetBits(1) << this.successiveLow);
+            }
+        }
+
+        private void DecodeBlockProgressiveAC(ref Block8x8 block, ref HuffmanTable acTable)
+        {
+            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
+            if (this.successiveHigh == 0)
+            {
+                // MCU decoding for AC initial scan (either spectral selection,
+                // or first pass of successive approximation).
+                if (this.eobrun != 0)
+                {
+                    --this.eobrun;
+                    return;
+                }
+
+                ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+                ref ZigZag zigzag = ref this.dctZigZag;
+                int start = this.spectralStart;
+                int end = this.spectralEnd;
+                int low = this.successiveLow;
+
+                for (int i = start; i <= end; ++i)
+                {
+                    int s = buffer.DecodeHuffman(ref acTable);
+                    int r = s >> 4;
+                    s &= 15;
+
+                    i += r;
+
+                    if (s != 0)
+                    {
+                        s = buffer.Receive(s);
+                        Unsafe.Add(ref blockDataRef, zigzag[i]) = (short)(s << low);
+                    }
+                    else
+                    {
+                        if (r != 15)
+                        {
+                            this.eobrun = 1 << r;
+                            if (r != 0)
+                            {
+                                buffer.CheckBits();
+                                this.eobrun += buffer.GetBits(r);
+                            }
+
+                            --this.eobrun;
+                            break;
+                        }
+                    }
+                }
+            }
+            else
+            {
+                // Refinement scan for these AC coefficients
+                this.DecodeBlockProgressiveACRefined(ref blockDataRef, ref acTable);
+            }
+        }
+
+        private void DecodeBlockProgressiveACRefined(ref short blockDataRef, ref HuffmanTable acTable)
+        {
+            // Refinement scan for these AC coefficients
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
+            ref ZigZag zigzag = ref this.dctZigZag;
+            int start = this.spectralStart;
+            int end = this.spectralEnd;
+
+            int p1 = 1 << this.successiveLow;
+            int m1 = (-1) << this.successiveLow;
+
+            int k = start;
+
+            if (this.eobrun == 0)
+            {
+                for (; k <= end; k++)
+                {
+                    int s = buffer.DecodeHuffman(ref acTable);
+                    int r = s >> 4;
+                    s &= 15;
+
+                    if (s != 0)
+                    {
+                        buffer.CheckBits();
+                        if (buffer.GetBits(1) != 0)
+                        {
+                            s = p1;
+                        }
+                        else
+                        {
+                            s = m1;
+                        }
+                    }
+                    else
+                    {
+                        if (r != 15)
+                        {
+                            this.eobrun = 1 << r;
+
+                            if (r != 0)
+                            {
+                                buffer.CheckBits();
+                                this.eobrun += buffer.GetBits(r);
+                            }
+
+                            break;
+                        }
+                    }
+
+                    do
+                    {
+                        ref short coef = ref Unsafe.Add(ref blockDataRef, zigzag[k]);
+                        if (coef != 0)
+                        {
+                            buffer.CheckBits();
+                            if (buffer.GetBits(1) != 0)
+                            {
+                                if ((coef & p1) == 0)
+                                {
+                                    coef += (short)(coef >= 0 ? p1 : m1);
+                                }
+                            }
+                        }
+                        else
+                        {
+                            if (--r < 0)
+                            {
+                                break;
+                            }
+                        }
+
+                        k++;
+                    }
+                    while (k <= end);
+
+                    if ((s != 0) && (k < 64))
+                    {
+                        Unsafe.Add(ref blockDataRef, zigzag[k]) = (short)s;
+                    }
+                }
+            }
+
+            if (this.eobrun > 0)
+            {
+                for (; k <= end; k++)
+                {
+                    ref short coef = ref Unsafe.Add(ref blockDataRef, zigzag[k]);
+
+                    if (coef != 0)
+                    {
+                        buffer.CheckBits();
+                        if (buffer.GetBits(1) != 0)
+                        {
+                            if ((coef & p1) == 0)
+                            {
+                                coef += (short)(coef >= 0 ? p1 : m1);
+                            }
+                        }
+                    }
+                }
+
+                --this.eobrun;
+            }
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void Reset()
+        {
+            for (int i = 0; i < this.components.Length; i++)
+            {
+                this.components[i].DcPredictor = 0;
+            }
+
+            this.eobrun = 0;
+            this.scanBuffer.Reset();
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private bool HandleRestart()
+        {
+            if (this.restartInterval > 0 && (--this.todo) == 0)
+            {
+                this.todo = this.restartInterval;
+
+                if (this.scanBuffer.HasRestart())
+                {
+                    this.Reset();
+                    return true;
+                }
+
+                if (this.scanBuffer.Marker != JpegConstants.Markers.XFF)
+                {
+                    this.stream.Position = this.scanBuffer.MarkerPosition;
+                    this.Reset();
+                    return true;
+                }
+            }
+
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index 7e025e271e..21ed5018f3 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -2,53 +2,60 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Buffers;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-
-using SixLabors.ImageSharp.Memory;
 using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Represents a Huffman Table
+    /// Represents a Huffman coding table containing basic coding data plus tables for accellerated computation.
     /// </summary>
     [StructLayout(LayoutKind.Sequential)]
     internal unsafe struct HuffmanTable
     {
-        private bool isDerived;
-
         private readonly MemoryAllocator memoryAllocator;
+        private bool isConfigured;
 
-#pragma warning disable IDE0044 // Add readonly modifier
-        private fixed byte codeLengths[17];
-#pragma warning restore IDE0044 // Add readonly modifier
+        /// <summary>
+        /// Derived from the DHT marker. Sizes[k] = # of symbols with codes of length k bits; Sizes[0] is unused.
+        /// </summary>
+        public fixed byte Sizes[17];
 
         /// <summary>
-        /// Gets the max code array.
+        /// Derived from the DHT marker. Contains the symbols, in order of incremental code length.
         /// </summary>
-        public fixed uint MaxCode[18];
+        public fixed byte Values[256];
 
         /// <summary>
-        /// Gets the value offset array.
+        /// Contains the largest code of length k (0 if none). MaxCode[17] is a sentinel to
+        /// ensure <see cref="HuffmanScanBuffer.DecodeHuffman"/> terminates.
         /// </summary>
-        public fixed int ValOffset[18];
+        public fixed ulong MaxCode[18];
 
         /// <summary>
-        /// Gets the huffman value array.
+        /// Values[] offset for codes of length k  ValOffset[k] = Values[] index of 1st symbol of code length
+        /// k, less the smallest code of length k; so given a code of length k, the corresponding symbol is
+        /// Values[code + ValOffset[k]].
         /// </summary>
-        public fixed byte Values[256];
+        public fixed int ValOffset[19];
 
         /// <summary>
-        /// Gets the lookahead array.
+        /// Contains the length of bits for the given k value.
         /// </summary>
-        public fixed byte Lookahead[512];
+        public fixed byte LookaheadSize[JpegConstants.Huffman.LookupSize];
 
         /// <summary>
-        /// Gets the sizes array
+        /// Lookahead table: indexed by the next <see cref="JpegConstants.Huffman.LookupBits"/> bits of
+        /// the input data stream.  If the next Huffman code is no more
+        /// than <see cref="JpegConstants.Huffman.LookupBits"/> bits long, we can obtain its length and
+        /// the corresponding symbol directly from this tables.
+        ///
+        /// The lower 8 bits of each table entry contain the number of
+        /// bits in the corresponding Huffman code, or <see cref="JpegConstants.Huffman.LookupBits"/> + 1
+        /// if too long.  The next 8 bits of each entry contain the symbol.
         /// </summary>
-        public fixed short Sizes[257];
+        public fixed byte LookaheadValue[JpegConstants.Huffman.LookupSize];
 
         /// <summary>
         /// Initializes a new instance of the <see cref="HuffmanTable"/> struct.
@@ -58,91 +65,104 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <param name="values">The huffman values</param>
         public HuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
         {
-            this.isDerived = false;
+            this.isConfigured = false;
             this.memoryAllocator = memoryAllocator;
-            Unsafe.CopyBlockUnaligned(ref this.codeLengths[0], ref MemoryMarshal.GetReference(codeLengths), (uint)codeLengths.Length);
+            Unsafe.CopyBlockUnaligned(ref this.Sizes[0], ref MemoryMarshal.GetReference(codeLengths), (uint)codeLengths.Length);
             Unsafe.CopyBlockUnaligned(ref this.Values[0], ref MemoryMarshal.GetReference(values), (uint)values.Length);
         }
 
         /// <summary>
-        /// Expands the HuffmanTable into its derived form.
+        /// Expands the HuffmanTable into its readable form.
         /// </summary>
-        public void Derive()
+        public void Configure()
         {
-            if (this.isDerived)
+            if (this.isConfigured)
             {
                 return;
             }
 
-            const int Length = 257;
-            using (IMemoryOwner<short> huffcode = this.memoryAllocator.Allocate<short>(Length))
-            {
-                ref short huffcodeRef = ref MemoryMarshal.GetReference(huffcode.GetSpan());
-                ref byte codeLengthsRef = ref this.codeLengths[0];
+            int p, si;
+            Span<char> huffsize = stackalloc char[257];
+            Span<uint> huffcode = stackalloc uint[257];
+            uint code;
 
-                // Figure C.1: make table of Huffman code length for each symbol
-                ref short sizesRef = ref this.Sizes[0];
-                short x = 0;
-                for (short i = 1; i < 17; i++)
+            // Figure C.1: make table of Huffman code length for each symbol
+            p = 0;
+            for (int l = 1; l <= 16; l++)
+            {
+                int i = this.Sizes[l];
+                while (i-- != 0)
                 {
-                    byte length = Unsafe.Add(ref codeLengthsRef, i);
-                    for (short j = 0; j < length; j++)
-                    {
-                        Unsafe.Add(ref sizesRef, x++) = i;
-                    }
+                    huffsize[p++] = (char)l;
                 }
+            }
 
-                Unsafe.Add(ref sizesRef, x) = 0;
-
-                // Figure C.2: generate the codes themselves
-                int si = 0;
-                ref int valOffsetRef = ref this.ValOffset[0];
-                ref uint maxcodeRef = ref this.MaxCode[0];
+            huffsize[p] = (char)0;
 
-                uint code = 0;
-                int k;
-                for (k = 1; k < 17; k++)
+            // Figure C.2: generate the codes themselves
+            code = 0;
+            si = huffsize[0];
+            p = 0;
+            while (huffsize[p] != 0)
+            {
+                while (huffsize[p] == si)
                 {
-                    // Compute delta to add to code to compute symbol id.
-                    Unsafe.Add(ref valOffsetRef, k) = (int)(si - code);
-                    if (Unsafe.Add(ref sizesRef, si) == k)
-                    {
-                        while (Unsafe.Add(ref sizesRef, si) == k)
-                        {
-                            Unsafe.Add(ref huffcodeRef, si++) = (short)code++;
-                        }
-                    }
+                    huffcode[p++] = code;
+                    code++;
+                }
+
+                code <<= 1;
+                si++;
+            }
 
-                    // Figure F.15: generate decoding tables for bit-sequential decoding.
-                    // Compute largest code + 1 for this size. preshifted as we need it later.
-                    Unsafe.Add(ref maxcodeRef, k) = code << (16 - k);
-                    code <<= 1;
+            // Figure F.15: generate decoding tables for bit-sequential decoding
+            p = 0;
+            for (int l = 1; l <= 16; l++)
+            {
+                if (this.Sizes[l] != 0)
+                {
+                    int offset = p - (int)huffcode[p];
+                    this.ValOffset[l] = offset;
+                    p += this.Sizes[l];
+                    this.MaxCode[l] = huffcode[p - 1]; // Maximum code of length l
+                    this.MaxCode[l] <<= 64 - l; // Left justify
+                    this.MaxCode[l] |= (1ul << (64 - l)) - 1;
+                }
+                else
+                {
+                    this.MaxCode[l] = 0;
                 }
+            }
 
-                Unsafe.Add(ref maxcodeRef, k) = 0xFFFFFFFF;
+            this.ValOffset[18] = 0;
+            this.MaxCode[17] = ulong.MaxValue; // Ensures huff decode terminates
 
-                // Generate non-spec lookup tables to speed up decoding.
-                const int FastBits = ScanDecoder.FastBits;
-                ref byte lookaheadRef = ref this.Lookahead[0];
-                Unsafe.InitBlockUnaligned(ref lookaheadRef, 0xFF, 1 << FastBits); // Flag for non-accelerated
+            // Compute lookahead tables to speed up decoding.
+            // First we set all the table entries to JpegConstants.Huffman.SlowBits, indicating "too long";
+            // then we iterate through the Huffman codes that are short enough and
+            // fill in all the entries that correspond to bit sequences starting
+            // with that code.
+            ref byte lookupSizeRef = ref this.LookaheadSize[0];
+            Unsafe.InitBlockUnaligned(ref lookupSizeRef, JpegConstants.Huffman.SlowBits, JpegConstants.Huffman.LookupSize);
 
-                for (int i = 0; i < si; i++)
+            p = 0;
+            for (int length = 1; length <= JpegConstants.Huffman.LookupBits; length++)
+            {
+                for (int i = 1; i <= this.Sizes[length]; i++, p++)
                 {
-                    int size = Unsafe.Add(ref sizesRef, i);
-                    if (size <= FastBits)
+                    // length = current code's length, p = its index in huffcode[] & huffval[].
+                    // Generate left-justified code followed by all possible bit sequences
+                    int lookbits = (int)(huffcode[p] << (JpegConstants.Huffman.LookupBits - length));
+                    for (int ctr = 1 << (JpegConstants.Huffman.LookupBits - length); ctr > 0; ctr--)
                     {
-                        int fastOffset = FastBits - size;
-                        int fastCode = Unsafe.Add(ref huffcodeRef, i) << fastOffset;
-                        int fastMax = 1 << fastOffset;
-                        for (int left = 0; left < fastMax; left++)
-                        {
-                            Unsafe.Add(ref lookaheadRef, fastCode + left) = (byte)i;
-                        }
+                        this.LookaheadSize[lookbits] = (byte)length;
+                        this.LookaheadValue[lookbits] = this.Values[p];
+                        lookbits++;
                     }
                 }
             }
 
-            this.isDerived = true;
+            this.isConfigured = true;
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
deleted file mode 100644
index ef4b359ff2..0000000000
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ScanDecoder.cs
+++ /dev/null
@@ -1,1058 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-using SixLabors.ImageSharp.IO;
-using SixLabors.ImageSharp.Memory;
-
-namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
-{
-    /// <summary>
-    /// Decodes the Huffman encoded spectral scan.
-    /// Originally ported from <see href="https://github.com/rds1983/StbSharp"/>
-    /// with additional fixes for both performance and common encoding errors.
-    /// </summary>
-    internal class ScanDecoder
-    {
-        // The number of bits that can be read via a LUT.
-        public const int FastBits = 9;
-
-        // LUT mask for n rightmost bits. Bmask[n] = (1 << n) - 1
-        private static readonly uint[] Bmask = { 0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535 };
-
-        // LUT Bias[n] = (-1 << n) + 1
-        private static readonly int[] Bias = { 0, -1, -3, -7, -15, -31, -63, -127, -255, -511, -1023, -2047, -4095, -8191, -16383, -32767 };
-
-        private readonly JpegFrame frame;
-        private readonly HuffmanTable[] dcHuffmanTables;
-        private readonly HuffmanTable[] acHuffmanTables;
-        private readonly FastACTable[] fastACTables;
-
-        private readonly DoubleBufferedStreamReader stream;
-        private readonly JpegComponent[] components;
-        private readonly ZigZag dctZigZag;
-
-        // The restart interval.
-        private readonly int restartInterval;
-
-        // The number of interleaved components.
-        private readonly int componentsLength;
-
-        // The spectral selection start.
-        private readonly int spectralStart;
-
-        // The spectral selection end.
-        private readonly int spectralEnd;
-
-        // The successive approximation high bit end.
-        private readonly int successiveHigh;
-
-        // The successive approximation low bit end.
-        private readonly int successiveLow;
-
-        // The number of valid bits left to read in the buffer.
-        private int codeBits;
-
-        // The entropy encoded code buffer.
-        private uint codeBuffer;
-
-        // Whether there is more data to pull from the stream for the current mcu.
-        private bool nomore;
-
-        // Whether we have prematurely reached the end of the file.
-        private bool eof;
-
-        // The current, if any, marker in the input stream.
-        private byte marker;
-
-        // Whether we have a bad marker, I.E. One that is not between RST0 and RST7
-        private bool badMarker;
-
-        // The opening position of an identified marker.
-        private long markerPosition;
-
-        // How many mcu's are left to do.
-        private int todo;
-
-        // The End-Of-Block countdown for ending the sequence prematurely when the remaining coefficients are zero.
-        private int eobrun;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ScanDecoder"/> class.
-        /// </summary>
-        /// <param name="stream">The input stream.</param>
-        /// <param name="frame">The image frame.</param>
-        /// <param name="dcHuffmanTables">The DC Huffman tables.</param>
-        /// <param name="acHuffmanTables">The AC Huffman tables.</param>
-        /// <param name="fastACTables">The fast AC decoding tables.</param>
-        /// <param name="componentsLength">The length of the components. Different to the array length.</param>
-        /// <param name="restartInterval">The reset interval.</param>
-        /// <param name="spectralStart">The spectral selection start.</param>
-        /// <param name="spectralEnd">The spectral selection end.</param>
-        /// <param name="successiveHigh">The successive approximation bit high end.</param>
-        /// <param name="successiveLow">The successive approximation bit low end.</param>
-        public ScanDecoder(
-            DoubleBufferedStreamReader stream,
-            JpegFrame frame,
-            HuffmanTable[] dcHuffmanTables,
-            HuffmanTable[] acHuffmanTables,
-            FastACTable[] fastACTables,
-            int componentsLength,
-            int restartInterval,
-            int spectralStart,
-            int spectralEnd,
-            int successiveHigh,
-            int successiveLow)
-        {
-            this.dctZigZag = ZigZag.CreateUnzigTable();
-            this.stream = stream;
-            this.frame = frame;
-            this.dcHuffmanTables = dcHuffmanTables;
-            this.acHuffmanTables = acHuffmanTables;
-            this.fastACTables = fastACTables;
-            this.components = frame.Components;
-            this.marker = JpegConstants.Markers.XFF;
-            this.markerPosition = 0;
-            this.componentsLength = componentsLength;
-            this.restartInterval = restartInterval;
-            this.spectralStart = spectralStart;
-            this.spectralEnd = spectralEnd;
-            this.successiveHigh = successiveHigh;
-            this.successiveLow = successiveLow;
-        }
-
-        /// <summary>
-        /// Decodes the entropy coded data.
-        /// </summary>
-        public void ParseEntropyCodedData()
-        {
-            this.Reset();
-
-            if (!this.frame.Progressive)
-            {
-                this.ParseBaselineData();
-            }
-            else
-            {
-                this.ParseProgressiveData();
-            }
-
-            if (this.badMarker)
-            {
-                this.stream.Position = this.markerPosition;
-            }
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private static uint LRot(uint x, int y) => (x << y) | (x >> (32 - y));
-
-        private void ParseBaselineData()
-        {
-            if (this.componentsLength == 1)
-            {
-                this.ParseBaselineDataNonInterleaved();
-            }
-            else
-            {
-                this.ParseBaselineDataInterleaved();
-            }
-        }
-
-        private unsafe void ParseBaselineDataInterleaved()
-        {
-            // Interleaved
-            int mcu = 0;
-            int mcusPerColumn = this.frame.McusPerColumn;
-            int mcusPerLine = this.frame.McusPerLine;
-
-            // Pre-derive the huffman table to avoid in-loop checks.
-            for (int i = 0; i < this.componentsLength; i++)
-            {
-                int order = this.frame.ComponentOrder[i];
-                JpegComponent component = this.components[order];
-
-                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-                dcHuffmanTable.Derive();
-                acHuffmanTable.Derive();
-
-                ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
-                fastAcTable.Derive(ref acHuffmanTable);
-            }
-
-            for (int j = 0; j < mcusPerColumn; j++)
-            {
-                for (int i = 0; i < mcusPerLine; i++)
-                {
-                    // Scan an interleaved mcu... process components in order
-                    int mcuRow = mcu / mcusPerLine;
-                    int mcuCol = mcu % mcusPerLine;
-                    for (int k = 0; k < this.componentsLength; k++)
-                    {
-                        int order = this.frame.ComponentOrder[k];
-                        JpegComponent component = this.components[order];
-
-                        ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-                        ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-                        ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
-                        ref short fastACRef = ref fastAcTable.Lookahead[0];
-
-                        int h = component.HorizontalSamplingFactor;
-                        int v = component.VerticalSamplingFactor;
-
-                        // Scan out an mcu's worth of this component; that's just determined
-                        // by the basic H and V specified for the component
-                        for (int y = 0; y < v; y++)
-                        {
-                            int blockRow = (mcuRow * v) + y;
-                            Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
-                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
-
-                            for (int x = 0; x < h; x++)
-                            {
-                                if (this.eof)
-                                {
-                                    return;
-                                }
-
-                                int blockCol = (mcuCol * h) + x;
-
-                                this.DecodeBlockBaseline(
-                                    component,
-                                    ref Unsafe.Add(ref blockRef, blockCol),
-                                    ref dcHuffmanTable,
-                                    ref acHuffmanTable,
-                                    ref fastACRef);
-                            }
-                        }
-                    }
-
-                    // After all interleaved components, that's an interleaved MCU,
-                    // so now count down the restart interval
-                    mcu++;
-                    if (!this.ContinueOnMcuComplete())
-                    {
-                        return;
-                    }
-                }
-            }
-        }
-
-        /// <summary>
-        /// Non-interleaved data, we just need to process one block at a time in trivial scanline order
-        /// number of blocks to do just depends on how many actual "pixels" each component has,
-        /// independent of interleaved MCU blocking and such.
-        /// </summary>
-        private unsafe void ParseBaselineDataNonInterleaved()
-        {
-            JpegComponent component = this.components[this.frame.ComponentOrder[0]];
-
-            int w = component.WidthInBlocks;
-            int h = component.HeightInBlocks;
-
-            ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-            ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-            dcHuffmanTable.Derive();
-            acHuffmanTable.Derive();
-
-            ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
-            fastAcTable.Derive(ref acHuffmanTable);
-            ref short fastACRef = ref fastAcTable.Lookahead[0];
-
-            int mcu = 0;
-            for (int j = 0; j < h; j++)
-            {
-                int blockRow = j;
-                Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
-                ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
-
-                for (int i = 0; i < w; i++)
-                {
-                    if (this.eof)
-                    {
-                        return;
-                    }
-
-                    this.DecodeBlockBaseline(
-                        component,
-                        ref Unsafe.Add(ref blockRef, i),
-                        ref dcHuffmanTable,
-                        ref acHuffmanTable,
-                        ref fastACRef);
-
-                    // Every data block is an MCU, so countdown the restart interval
-                    mcu++;
-                    if (!this.ContinueOnMcuComplete())
-                    {
-                        return;
-                    }
-                }
-            }
-        }
-
-        private void CheckProgressiveData()
-        {
-            // Validate successive scan parameters.
-            // Logic has been adapted from libjpeg.
-            // See Table B.3 – Scan header parameter size and values. itu-t81.pdf
-            bool invalid = false;
-            if (this.spectralStart == 0)
-            {
-                if (this.spectralEnd != 0)
-                {
-                    invalid = true;
-                }
-            }
-            else
-            {
-                // Need not check Ss/Se < 0 since they came from unsigned bytes.
-                if (this.spectralEnd < this.spectralStart || this.spectralEnd > 63)
-                {
-                    invalid = true;
-                }
-
-                // AC scans may have only one component.
-                if (this.componentsLength != 1)
-                {
-                    invalid = true;
-                }
-            }
-
-            if (this.successiveHigh != 0)
-            {
-                // Successive approximation refinement scan: must have Al = Ah-1.
-                if (this.successiveHigh - 1 != this.successiveLow)
-                {
-                    invalid = true;
-                }
-            }
-
-            // TODO: How does this affect 12bit jpegs.
-            // According to libjpeg the range covers 8bit only?
-            if (this.successiveLow > 13)
-            {
-                invalid = true;
-            }
-
-            if (invalid)
-            {
-                JpegThrowHelper.ThrowBadProgressiveScan(this.spectralStart, this.spectralEnd, this.successiveHigh, this.successiveLow);
-            }
-        }
-
-        private void ParseProgressiveData()
-        {
-            this.CheckProgressiveData();
-
-            if (this.componentsLength == 1)
-            {
-                this.ParseProgressiveDataNonInterleaved();
-            }
-            else
-            {
-                this.ParseProgressiveDataInterleaved();
-            }
-        }
-
-        private void ParseProgressiveDataInterleaved()
-        {
-            // Interleaved
-            int mcu = 0;
-            int mcusPerColumn = this.frame.McusPerColumn;
-            int mcusPerLine = this.frame.McusPerLine;
-
-            // Pre-derive the huffman table to avoid in-loop checks.
-            for (int k = 0; k < this.componentsLength; k++)
-            {
-                int order = this.frame.ComponentOrder[k];
-                JpegComponent component = this.components[order];
-                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-                dcHuffmanTable.Derive();
-            }
-
-            for (int j = 0; j < mcusPerColumn; j++)
-            {
-                for (int i = 0; i < mcusPerLine; i++)
-                {
-                    // Scan an interleaved mcu... process components in order
-                    int mcuRow = mcu / mcusPerLine;
-                    int mcuCol = mcu % mcusPerLine;
-                    for (int k = 0; k < this.componentsLength; k++)
-                    {
-                        int order = this.frame.ComponentOrder[k];
-                        JpegComponent component = this.components[order];
-                        ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-
-                        int h = component.HorizontalSamplingFactor;
-                        int v = component.VerticalSamplingFactor;
-
-                        // Scan out an mcu's worth of this component; that's just determined
-                        // by the basic H and V specified for the component
-                        for (int y = 0; y < v; y++)
-                        {
-                            int blockRow = (mcuRow * v) + y;
-                            Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(blockRow);
-                            ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
-
-                            for (int x = 0; x < h; x++)
-                            {
-                                if (this.eof)
-                                {
-                                    return;
-                                }
-
-                                int blockCol = (mcuCol * h) + x;
-
-                                this.DecodeBlockProgressiveDC(
-                                    component,
-                                    ref Unsafe.Add(ref blockRef, blockCol),
-                                    ref dcHuffmanTable);
-                            }
-                        }
-                    }
-
-                    // After all interleaved components, that's an interleaved MCU,
-                    // so now count down the restart interval
-                    mcu++;
-                    if (!this.ContinueOnMcuComplete())
-                    {
-                        return;
-                    }
-                }
-            }
-        }
-
-        /// <summary>
-        /// Non-interleaved data, we just need to process one block at a time,
-        /// in trivial scanline order
-        /// number of blocks to do just depends on how many actual "pixels" this
-        /// component has, independent of interleaved MCU blocking and such
-        /// </summary>
-        private unsafe void ParseProgressiveDataNonInterleaved()
-        {
-            JpegComponent component = this.components[this.frame.ComponentOrder[0]];
-
-            int w = component.WidthInBlocks;
-            int h = component.HeightInBlocks;
-
-            if (this.spectralStart == 0)
-            {
-                ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-                dcHuffmanTable.Derive();
-
-                int mcu = 0;
-                for (int j = 0; j < h; j++)
-                {
-                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
-                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
-
-                    for (int i = 0; i < w; i++)
-                    {
-                        if (this.eof)
-                        {
-                            return;
-                        }
-
-                        this.DecodeBlockProgressiveDC(
-                            component,
-                            ref Unsafe.Add(ref blockRef, i),
-                            ref dcHuffmanTable);
-
-                        // Every data block is an MCU, so countdown the restart interval
-                        mcu++;
-                        if (!this.ContinueOnMcuComplete())
-                        {
-                            return;
-                        }
-                    }
-                }
-            }
-            else
-            {
-                ref HuffmanTable acHuffmanTable = ref this.acHuffmanTables[component.ACHuffmanTableId];
-                acHuffmanTable.Derive();
-
-                ref FastACTable fastAcTable = ref this.fastACTables[component.ACHuffmanTableId];
-                fastAcTable.Derive(ref acHuffmanTable);
-                ref short fastACRef = ref fastAcTable.Lookahead[0];
-
-                int mcu = 0;
-                for (int j = 0; j < h; j++)
-                {
-                    Span<Block8x8> blockSpan = component.SpectralBlocks.GetRowSpan(j);
-                    ref Block8x8 blockRef = ref MemoryMarshal.GetReference(blockSpan);
-
-                    for (int i = 0; i < w; i++)
-                    {
-                        if (this.eof)
-                        {
-                            return;
-                        }
-
-                        this.DecodeBlockProgressiveAC(
-                            ref Unsafe.Add(ref blockRef, i),
-                            ref acHuffmanTable,
-                            ref fastACRef);
-
-                        // Every data block is an MCU, so countdown the restart interval
-                        mcu++;
-                        if (!this.ContinueOnMcuComplete())
-                        {
-                            return;
-                        }
-                    }
-                }
-            }
-        }
-
-        private void DecodeBlockBaseline(
-            JpegComponent component,
-            ref Block8x8 block,
-            ref HuffmanTable dcTable,
-            ref HuffmanTable acTable,
-            ref short fastACRef)
-        {
-            this.CheckBits();
-            int t = this.DecodeHuffman(ref dcTable);
-
-            if (t < 0)
-            {
-                JpegThrowHelper.ThrowBadHuffmanCode();
-            }
-
-            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
-
-            int diff = t != 0 ? this.ExtendReceive(t) : 0;
-            int dc = component.DcPredictor + diff;
-            component.DcPredictor = dc;
-            blockDataRef = (short)dc;
-
-            // Decode AC Components, See Jpeg Spec
-            int k = 1;
-            do
-            {
-                int zig;
-                int s;
-
-                this.CheckBits();
-                int c = this.PeekBits();
-                int r = Unsafe.Add(ref fastACRef, c);
-
-                if (r != 0)
-                {
-                    // Fast AC path
-                    k += (r >> 4) & 15; // Run
-                    s = r & 15; // Combined Length
-                    this.codeBuffer <<= s;
-                    this.codeBits -= s;
-
-                    // Decode into unzigzag location
-                    zig = this.dctZigZag[k++];
-                    Unsafe.Add(ref blockDataRef, zig) = (short)(r >> 8);
-                }
-                else
-                {
-                    int rs = this.DecodeHuffman(ref acTable);
-
-                    if (rs < 0)
-                    {
-                        JpegThrowHelper.ThrowBadHuffmanCode();
-                    }
-
-                    s = rs & 15;
-                    r = rs >> 4;
-
-                    if (s == 0)
-                    {
-                        if (rs != 0xF0)
-                        {
-                            break; // End block
-                        }
-
-                        k += 16;
-                    }
-                    else
-                    {
-                        k += r;
-
-                        // Decode into unzigzag location
-                        zig = this.dctZigZag[k++];
-                        Unsafe.Add(ref blockDataRef, zig) = (short)this.ExtendReceive(s);
-                    }
-                }
-            }
-            while (k < 64);
-        }
-
-        private void DecodeBlockProgressiveDC(
-            JpegComponent component,
-            ref Block8x8 block,
-            ref HuffmanTable dcTable)
-        {
-            this.CheckBits();
-
-            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
-
-            if (this.successiveHigh == 0)
-            {
-                // First scan for DC coefficient, must be first
-                int t = this.DecodeHuffman(ref dcTable);
-                int diff = t != 0 ? this.ExtendReceive(t) : 0;
-
-                int dc = component.DcPredictor + diff;
-                component.DcPredictor = dc;
-
-                blockDataRef = (short)(dc << this.successiveLow);
-            }
-            else
-            {
-                // Refinement scan for DC coefficient
-                if (this.GetBit() != 0)
-                {
-                    blockDataRef += (short)(1 << this.successiveLow);
-                }
-            }
-        }
-
-        private void DecodeBlockProgressiveAC(
-            ref Block8x8 block,
-            ref HuffmanTable acTable,
-            ref short fastACRef)
-        {
-            ref short blockDataRef = ref Unsafe.As<Block8x8, short>(ref block);
-
-            if (this.successiveHigh == 0)
-            {
-                // MCU decoding for AC initial scan (either spectral selection,
-                // or first pass of successive approximation).
-                int shift = this.successiveLow;
-
-                if (this.eobrun != 0)
-                {
-                    this.eobrun--;
-                    return;
-                }
-
-                int k = this.spectralStart;
-                do
-                {
-                    int zig;
-                    int s;
-
-                    this.CheckBits();
-                    int c = this.PeekBits();
-                    int r = Unsafe.Add(ref fastACRef, c);
-
-                    if (r != 0)
-                    {
-                        // Fast AC path
-                        k += (r >> 4) & 15; // Run
-                        s = r & 15; // Combined length
-                        this.codeBuffer <<= s;
-                        this.codeBits -= s;
-
-                        // Decode into unzigzag location
-                        zig = this.dctZigZag[k++];
-                        Unsafe.Add(ref blockDataRef, zig) = (short)((r >> 8) << shift);
-                    }
-                    else
-                    {
-                        int rs = this.DecodeHuffman(ref acTable);
-
-                        if (rs < 0)
-                        {
-                            JpegThrowHelper.ThrowBadHuffmanCode();
-                        }
-
-                        s = rs & 15;
-                        r = rs >> 4;
-
-                        if (s == 0)
-                        {
-                            if (r < 15)
-                            {
-                                this.eobrun = 1 << r;
-                                if (r != 0)
-                                {
-                                    this.eobrun += this.GetBits(r);
-                                }
-
-                                this.eobrun--;
-                                break;
-                            }
-
-                            k += 16;
-                        }
-                        else
-                        {
-                            k += r;
-                            zig = this.dctZigZag[k++];
-                            Unsafe.Add(ref blockDataRef, zig) = (short)(this.ExtendReceive(s) << shift);
-                        }
-                    }
-                }
-                while (k <= this.spectralEnd);
-            }
-            else
-            {
-                // Refinement scan for these AC coefficients
-                this.DecodeBlockProgressiveACRefined(ref blockDataRef, ref acTable);
-            }
-        }
-
-        private void DecodeBlockProgressiveACRefined(ref short blockDataRef, ref HuffmanTable acTable)
-        {
-            int k;
-
-            // Refinement scan for these AC coefficients
-            short bit = (short)(1 << this.successiveLow);
-
-            if (this.eobrun != 0)
-            {
-                this.eobrun--;
-                for (k = this.spectralStart; k <= this.spectralEnd; k++)
-                {
-                    ref short p = ref Unsafe.Add(ref blockDataRef, this.dctZigZag[k]);
-                    if (p != 0)
-                    {
-                        if (this.GetBit() != 0)
-                        {
-                            if ((p & bit) == 0)
-                            {
-                                if (p > 0)
-                                {
-                                    p += bit;
-                                }
-                                else
-                                {
-                                    p -= bit;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            else
-            {
-                k = this.spectralStart;
-                do
-                {
-                    int rs = this.DecodeHuffman(ref acTable);
-                    if (rs < 0)
-                    {
-                        JpegThrowHelper.ThrowBadHuffmanCode();
-                    }
-
-                    int s = rs & 15;
-                    int r = rs >> 4;
-
-                    if (s == 0)
-                    {
-                        // r=15 s=0 should write 16 0s, so we just do
-                        // a run of 15 0s and then write s (which is 0),
-                        // so we don't have to do anything special here
-                        if (r < 15)
-                        {
-                            this.eobrun = (1 << r) - 1;
-
-                            if (r != 0)
-                            {
-                                this.eobrun += this.GetBits(r);
-                            }
-
-                            r = 64; // Force end of block
-                        }
-                    }
-                    else
-                    {
-                        if (s != 1)
-                        {
-                            JpegThrowHelper.ThrowBadHuffmanCode();
-                        }
-
-                        // Sign bit
-                        if (this.GetBit() != 0)
-                        {
-                            s = bit;
-                        }
-                        else
-                        {
-                            s = -bit;
-                        }
-                    }
-
-                    // Advance by r
-                    while (k <= this.spectralEnd)
-                    {
-                        ref short p = ref Unsafe.Add(ref blockDataRef, this.dctZigZag[k++]);
-                        if (p != 0)
-                        {
-                            if (this.GetBit() != 0)
-                            {
-                                if ((p & bit) == 0)
-                                {
-                                    if (p > 0)
-                                    {
-                                        p += bit;
-                                    }
-                                    else
-                                    {
-                                        p -= bit;
-                                    }
-                                }
-                            }
-                        }
-                        else
-                        {
-                            if (r == 0)
-                            {
-                                p = (short)s;
-                                break;
-                            }
-
-                            r--;
-                        }
-                    }
-                }
-                while (k <= this.spectralEnd);
-            }
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private int GetBits(int n)
-        {
-            if (this.codeBits < n)
-            {
-                this.FillBuffer();
-            }
-
-            uint k = LRot(this.codeBuffer, n);
-            uint mask = Bmask[n];
-            this.codeBuffer = k & ~mask;
-            k &= mask;
-            this.codeBits -= n;
-            return (int)k;
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private int GetBit()
-        {
-            if (this.codeBits < 1)
-            {
-                this.FillBuffer();
-            }
-
-            uint k = this.codeBuffer;
-            this.codeBuffer <<= 1;
-            this.codeBits--;
-
-            return (int)(k & 0x80000000);
-        }
-
-        [MethodImpl(InliningOptions.ColdPath)]
-        private void FillBuffer()
-        {
-            // Attempt to load at least the minimum number of required bits into the buffer.
-            // We fail to do so only if we hit a marker or reach the end of the input stream.
-            do
-            {
-                int b = this.nomore ? 0 : this.stream.ReadByte();
-
-                if (b == -1)
-                {
-                    // We've encountered the end of the file stream which means there's no EOI marker in the image
-                    // or the SOS marker has the wrong dimensions set.
-                    this.eof = true;
-                    b = 0;
-                }
-
-                // Found a marker.
-                if (b == JpegConstants.Markers.XFF)
-                {
-                    this.markerPosition = this.stream.Position - 1;
-                    int c = this.stream.ReadByte();
-                    while (c == JpegConstants.Markers.XFF)
-                    {
-                        c = this.stream.ReadByte();
-
-                        if (c == -1)
-                        {
-                            this.eof = true;
-                            c = 0;
-                            break;
-                        }
-                    }
-
-                    if (c != 0)
-                    {
-                        this.marker = (byte)c;
-                        this.nomore = true;
-                        if (!this.HasRestart())
-                        {
-                            this.badMarker = true;
-                        }
-
-                        return;
-                    }
-                }
-
-                this.codeBuffer |= (uint)b << (24 - this.codeBits);
-                this.codeBits += 8;
-            }
-            while (this.codeBits <= 24);
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private unsafe int DecodeHuffman(ref HuffmanTable table)
-        {
-            this.CheckBits();
-
-            // Look at the top FastBits and determine what symbol ID it is,
-            // if the code is <= FastBits.
-            int c = this.PeekBits();
-            int k = table.Lookahead[c];
-            if (k < 0xFF)
-            {
-                int s = table.Sizes[k];
-                if (s > this.codeBits)
-                {
-                    return -1;
-                }
-
-                this.codeBuffer <<= s;
-                this.codeBits -= s;
-                return table.Values[k];
-            }
-
-            return this.DecodeHuffmanSlow(ref table);
-        }
-
-        [MethodImpl(InliningOptions.ColdPath)]
-        private unsafe int DecodeHuffmanSlow(ref HuffmanTable table)
-        {
-            // Naive test is to shift the code_buffer down so k bits are
-            // valid, then test against MaxCode. To speed this up, we've
-            // preshifted maxcode left so that it has (16-k) 0s at the
-            // end; in other words, regardless of the number of bits, it
-            // wants to be compared against something shifted to have 16;
-            // that way we don't need to shift inside the loop.
-            uint temp = this.codeBuffer >> 16;
-            int k;
-            for (k = FastBits + 1; ; ++k)
-            {
-                if (temp < table.MaxCode[k])
-                {
-                    break;
-                }
-            }
-
-            if (k == 17)
-            {
-                // Error! code not found
-                this.codeBits -= 16;
-                return -1;
-            }
-
-            if (k > this.codeBits)
-            {
-                return -1;
-            }
-
-            // Convert the huffman code to the symbol id
-            int c = (int)(((this.codeBuffer >> (32 - k)) & Bmask[k]) + table.ValOffset[k]);
-
-            // Convert the id to a symbol
-            this.codeBits -= k;
-            this.codeBuffer <<= k;
-            return table.Values[c];
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private int ExtendReceive(int n)
-        {
-            if (this.codeBits < n)
-            {
-                this.FillBuffer();
-            }
-
-            int sgn = (int)this.codeBuffer >> 31;
-            uint k = LRot(this.codeBuffer, n);
-            this.codeBuffer = k & ~Bmask[n];
-            k &= Bmask[n];
-            this.codeBits -= n;
-            return (int)(k + (Bias[n] & ~sgn));
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private void CheckBits()
-        {
-            if (this.codeBits < 16)
-            {
-                this.FillBuffer();
-            }
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private int PeekBits() => (int)((this.codeBuffer >> (32 - FastBits)) & ((1 << FastBits) - 1));
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private bool ContinueOnMcuComplete()
-        {
-            if (--this.todo > 0)
-            {
-                return true;
-            }
-
-            if (this.codeBits < 24)
-            {
-                this.FillBuffer();
-            }
-
-            // If it's NOT a restart, then just bail, so we get corrupt data rather than no data.
-            // Reset the stream to before any bad markers to ensure we can read successive segments.
-            if (this.badMarker)
-            {
-                this.stream.Position = this.markerPosition;
-            }
-
-            if (!this.HasRestart())
-            {
-                return false;
-            }
-
-            this.Reset();
-
-            return true;
-        }
-
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private bool HasRestart()
-        {
-            byte m = this.marker;
-            return m >= JpegConstants.Markers.RST0 && m <= JpegConstants.Markers.RST7;
-        }
-
-        private void Reset()
-        {
-            this.codeBits = 0;
-            this.codeBuffer = 0;
-
-            for (int i = 0; i < this.components.Length; i++)
-            {
-                JpegComponent c = this.components[i];
-                c.DcPredictor = 0;
-            }
-
-            this.nomore = false;
-            this.marker = JpegConstants.Markers.XFF;
-            this.markerPosition = 0;
-            this.badMarker = false;
-            this.eobrun = 0;
-
-            // No more than 1<<31 MCUs if no restartInterval? that's plenty safe since we don't even allow 1<<30 pixels
-            this.todo = this.restartInterval > 0 ? this.restartInterval : int.MaxValue;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/JpegConstants.cs b/src/ImageSharp/Formats/Jpeg/JpegConstants.cs
index 49e3b41704..a39480e126 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegConstants.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegConstants.cs
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         public static readonly IEnumerable<string> FileExtensions = new[] { "jpg", "jpeg", "jfif" };
 
         /// <summary>
-        /// Contains marker specific constants
+        /// Contains marker specific constants.
         /// </summary>
         // ReSharper disable InconsistentNaming
         internal static class Markers
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         }
 
         /// <summary>
-        /// Contains Adobe specific constants
+        /// Contains Adobe specific constants.
         /// </summary>
         internal static class Adobe
         {
@@ -238,5 +238,32 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             /// </summary>
             public const byte ColorTransformYcck = 2;
         }
+
+        /// <summary>
+        /// Contains Huffman specific constants.
+        /// </summary>
+        internal static class Huffman
+        {
+            /// <summary>
+            /// The size of the huffman decoder register.
+            /// </summary>
+            public const int RegisterSize = 64;
+
+            /// <summary>
+            /// If the next Huffman code is no more than this number of bits, we can obtain its length
+            /// and the corresponding symbol directly from this tables.
+            /// </summary>
+            public const int LookupBits = 8;
+
+            /// <summary>
+            /// If a Huffman code is this number of bits we cannot use the lookup table to determine its value.
+            /// </summary>
+            public const int SlowBits = LookupBits + 1;
+
+            /// <summary>
+            /// The size of the lookup table.
+            /// </summary>
+            public const int LookupSize = 1 << LookupBits;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 6d6983f191..8bd6514e04 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -59,11 +59,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// </summary>
         private HuffmanTable[] acHuffmanTables;
 
-        /// <summary>
-        /// The fast AC tables used for entropy decoding
-        /// </summary>
-        private FastACTable[] fastACTables;
-
         /// <summary>
         /// The reset interval determined by RST markers
         /// </summary>
@@ -269,7 +264,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 const int maxTables = 4;
                 this.dcHuffmanTables = new HuffmanTable[maxTables];
                 this.acHuffmanTables = new HuffmanTable[maxTables];
-                this.fastACTables = new FastACTable[maxTables];
             }
 
             // Break only when we discover a valid EOI marker.
@@ -385,7 +379,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.Frame = null;
             this.dcHuffmanTables = null;
             this.acHuffmanTables = null;
-            this.fastACTables = null;
         }
 
         /// <summary>
@@ -936,12 +929,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             int spectralEnd = this.temp[1];
             int successiveApproximation = this.temp[2];
 
-            var sd = new ScanDecoder(
+            var sd = new HuffmanScanDecoder(
                 this.InputStream,
                 this.Frame,
                 this.dcHuffmanTables,
                 this.acHuffmanTables,
-                this.fastACTables,
                 selectorsCount,
                 this.resetInterval,
                 spectralStart,
diff --git a/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs b/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
index b30da28c45..7e8384dcff 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs
@@ -20,9 +20,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowBadQuantizationTable() => throw new ImageFormatException("Bad Quantization Table index.");
 
-        [MethodImpl(InliningOptions.ColdPath)]
-        public static void ThrowBadHuffmanCode() => throw new ImageFormatException("Bad Huffman code.");
-
         [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowBadSampling() => throw new ImageFormatException("Bad sampling factor.");
 
diff --git a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
index 6d5673d5a4..07f8928068 100644
--- a/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
+++ b/src/ImageSharp/IO/DoubleBufferedStreamReader.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 using System.Runtime.CompilerServices;
 
@@ -13,24 +14,28 @@ namespace SixLabors.ImageSharp.IO
     /// A stream reader that add a secondary level buffer in addition to native stream buffered reading
     /// to reduce the overhead of small incremental reads.
     /// </summary>
-    internal sealed class DoubleBufferedStreamReader : IDisposable
+    internal sealed unsafe class DoubleBufferedStreamReader : IDisposable
     {
         /// <summary>
         /// The length, in bytes, of the buffering chunk.
         /// </summary>
-        public const int ChunkLength = 4096;
+        public const int ChunkLength = 8192;
 
-        private const int ChunkLengthMinusOne = ChunkLength - 1;
+        private const int MaxChunkIndex = ChunkLength - 1;
 
         private readonly Stream stream;
 
         private readonly IManagedByteBuffer managedBuffer;
 
+        private MemoryHandle handle;
+
+        private readonly byte* pinnedChunk;
+
         private readonly byte[] bufferChunk;
 
         private readonly int length;
 
-        private int bytesRead;
+        private int chunkIndex;
 
         private int position;
 
@@ -44,8 +49,11 @@ namespace SixLabors.ImageSharp.IO
             this.stream = stream;
             this.Position = (int)stream.Position;
             this.length = (int)stream.Length;
-            this.managedBuffer = memoryAllocator.AllocateManagedByteBuffer(ChunkLength, AllocationOptions.Clean);
+            this.managedBuffer = memoryAllocator.AllocateManagedByteBuffer(ChunkLength);
             this.bufferChunk = this.managedBuffer.Array;
+            this.handle = this.managedBuffer.Memory.Pin();
+            this.pinnedChunk = (byte*)this.handle.Pointer;
+            this.chunkIndex = ChunkLength;
         }
 
         /// <summary>
@@ -62,10 +70,20 @@ namespace SixLabors.ImageSharp.IO
 
             set
             {
-                // Reset everything. It's easier than tracking.
-                this.position = (int)value;
-                this.stream.Seek(this.position, SeekOrigin.Begin);
-                this.bytesRead = ChunkLength;
+                // Only reset chunkIndex if we are out of bounds of our working chunk
+                // otherwise we should simply move the value by the diff.
+                int v = (int)value;
+                if (this.IsInChunk(v, out int index))
+                {
+                    this.chunkIndex = index;
+                    this.position = v;
+                }
+                else
+                {
+                    this.position = v;
+                    this.stream.Seek(value, SeekOrigin.Begin);
+                    this.chunkIndex = ChunkLength;
+                }
             }
         }
 
@@ -74,7 +92,7 @@ namespace SixLabors.ImageSharp.IO
         /// byte, or returns -1 if at the end of the stream.
         /// </summary>
         /// <returns>The unsigned byte cast to an <see cref="int"/>, or -1 if at the end of the stream.</returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [MethodImpl(InliningOptions.ShortMethod)]
         public int ReadByte()
         {
             if (this.position >= this.length)
@@ -82,24 +100,21 @@ namespace SixLabors.ImageSharp.IO
                 return -1;
             }
 
-            if (this.position == 0 || this.bytesRead > ChunkLengthMinusOne)
+            if (this.chunkIndex > MaxChunkIndex)
             {
-                return this.ReadByteSlow();
+                this.FillChunk();
             }
 
             this.position++;
-            return this.bufferChunk[this.bytesRead++];
+            return this.pinnedChunk[this.chunkIndex++];
         }
 
         /// <summary>
         /// Skips the number of bytes in the stream
         /// </summary>
-        /// <param name="count">The number of bytes to skip</param>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public void Skip(int count)
-        {
-            this.Position += count;
-        }
+        /// <param name="count">The number of bytes to skip.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void Skip(int count) => this.Position += count;
 
         /// <summary>
         /// Reads a sequence of bytes from the current stream and advances the position within the stream
@@ -120,36 +135,46 @@ namespace SixLabors.ImageSharp.IO
         /// of bytes requested if that many bytes are not currently available, or zero (0)
         /// if the end of the stream has been reached.
         /// </returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [MethodImpl(InliningOptions.ShortMethod)]
         public int Read(byte[] buffer, int offset, int count)
         {
-            if (buffer.Length > ChunkLength)
+            if (count > ChunkLength)
             {
                 return this.ReadToBufferSlow(buffer, offset, count);
             }
 
-            if (this.position == 0 || count + this.bytesRead > ChunkLength)
+            if (count + this.chunkIndex > ChunkLength)
             {
                 return this.ReadToChunkSlow(buffer, offset, count);
             }
 
-            int n = this.GetCount(count);
+            int n = this.GetCopyCount(count);
             this.CopyBytes(buffer, offset, n);
 
             this.position += n;
-            this.bytesRead += n;
-
+            this.chunkIndex += n;
             return n;
         }
 
         /// <inheritdoc/>
         public void Dispose()
         {
+            this.handle.Dispose();
             this.managedBuffer?.Dispose();
         }
 
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private int ReadByteSlow()
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private int GetPositionDifference(int p) => p - this.position;
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private bool IsInChunk(int p, out int index)
+        {
+            index = this.GetPositionDifference(p) + this.chunkIndex;
+            return index > -1 && index < ChunkLength;
+        }
+
+        [MethodImpl(InliningOptions.ColdPath)]
+        private void FillChunk()
         {
             if (this.position != this.stream.Position)
             {
@@ -157,34 +182,25 @@ namespace SixLabors.ImageSharp.IO
             }
 
             this.stream.Read(this.bufferChunk, 0, ChunkLength);
-            this.bytesRead = 0;
-
-            this.position++;
-            return this.bufferChunk[this.bytesRead++];
+            this.chunkIndex = 0;
         }
 
-        [MethodImpl(MethodImplOptions.NoInlining)]
+        [MethodImpl(InliningOptions.ColdPath)]
         private int ReadToChunkSlow(byte[] buffer, int offset, int count)
         {
             // Refill our buffer then copy.
-            if (this.position != this.stream.Position)
-            {
-                this.stream.Seek(this.position, SeekOrigin.Begin);
-            }
+            this.FillChunk();
 
-            this.stream.Read(this.bufferChunk, 0, ChunkLength);
-            this.bytesRead = 0;
-
-            int n = this.GetCount(count);
+            int n = this.GetCopyCount(count);
             this.CopyBytes(buffer, offset, n);
 
             this.position += n;
-            this.bytesRead += n;
+            this.chunkIndex += n;
 
             return n;
         }
 
-        [MethodImpl(MethodImplOptions.NoInlining)]
+        [MethodImpl(InliningOptions.ColdPath)]
         private int ReadToBufferSlow(byte[] buffer, int offset, int count)
         {
             // Read to target but don't copy to our chunk.
@@ -195,11 +211,12 @@ namespace SixLabors.ImageSharp.IO
 
             int n = this.stream.Read(buffer, offset, count);
             this.Position += n;
+
             return n;
         }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private int GetCount(int count)
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private int GetCopyCount(int count)
         {
             int n = this.length - this.position;
             if (n > count)
@@ -215,23 +232,23 @@ namespace SixLabors.ImageSharp.IO
             return n;
         }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [MethodImpl(InliningOptions.ShortMethod)]
         private void CopyBytes(byte[] buffer, int offset, int count)
         {
             if (count < 9)
             {
                 int byteCount = count;
-                int read = this.bytesRead;
-                byte[] chunk = this.bufferChunk;
+                int read = this.chunkIndex;
+                byte* pinned = this.pinnedChunk;
 
                 while (--byteCount > -1)
                 {
-                    buffer[offset + byteCount] = chunk[read + byteCount];
+                    buffer[offset + byteCount] = pinned[read + byteCount];
                 }
             }
             else
             {
-                Buffer.BlockCopy(this.bufferChunk, this.bytesRead, buffer, offset, count);
+                Buffer.BlockCopy(this.bufferChunk, this.chunkIndex, buffer, offset, count);
             }
         }
     }
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index f7f9e1d5f4..a124ddcacd 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -38,8 +38,8 @@
 
   <ItemGroup>
     <AdditionalFiles Include="..\..\standards\stylecop.json" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-beta.61" PrivateAssets="All" />
-    <PackageReference Include="SixLabors.Core" Version="1.0.0-beta0007" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-rc.114" PrivateAssets="All" />
+    <PackageReference Include="SixLabors.Core" Version="1.0.0-dev000101" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
   </ItemGroup>
 
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpegParseStreamOnly.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpegParseStreamOnly.cs
index 5958b9f79d..5a4a9ab17c 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpegParseStreamOnly.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpegParseStreamOnly.cs
@@ -47,5 +47,22 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
                 decoder.Dispose();
             }
         }
+
+        // RESULTS (2019 April 23):
+        //
+        // BenchmarkDotNet=v0.11.3, OS=Windows 10.0.17763.437 (1809/October2018Update/Redstone5)
+        // Intel Core i7-6600U CPU 2.60GHz (Skylake), 1 CPU, 4 logical and 2 physical cores
+        // .NET Core SDK=2.2.202
+        //  [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //  Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+        //  Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //
+        // |                      Method |  Job | Runtime |            TestImage |     Mean |    Error |    StdDev | Ratio | RatioSD |    Gen 0 | Gen 1 | Gen 2 | Allocated |
+        // |---------------------------- |----- |-------- |--------------------- |---------:|---------:|----------:|------:|--------:|---------:|------:|------:|----------:|
+        // |       'System.Drawing FULL' |  Clr |     Clr | Jpg/b(...)f.jpg [28] | 18.69 ms | 8.273 ms | 0.4535 ms |  1.00 |    0.00 | 343.7500 |     - |     - | 757.89 KB |
+        // | JpegDecoderCore.ParseStream |  Clr |     Clr | Jpg/b(...)f.jpg [28] | 15.76 ms | 4.266 ms | 0.2339 ms |  0.84 |    0.03 |        - |     - |     - |  11.83 KB |
+        // |                             |      |         |                      |          |          |           |       |         |          |       |       |           |
+        // |       'System.Drawing FULL' | Core |    Core | Jpg/b(...)f.jpg [28] | 17.68 ms | 2.711 ms | 0.1486 ms |  1.00 |    0.00 | 343.7500 |     - |     - | 757.04 KB |
+        // | JpegDecoderCore.ParseStream | Core |    Core | Jpg/b(...)f.jpg [28] | 14.27 ms | 3.671 ms | 0.2012 ms |  0.81 |    0.00 |        - |     - |     - |  11.76 KB |
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
index 8247ba42b5..62742f729b 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DecodeJpeg_ImageSpecific.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
                 public ShortClr()
                 {
                     this.Add(
-                        //Job.Clr.WithLaunchCount(1).WithWarmupCount(2).WithIterationCount(3),
+                        // Job.Clr.WithLaunchCount(1).WithWarmupCount(2).WithIterationCount(3),
                         Job.Core.WithLaunchCount(1).WithWarmupCount(2).WithIterationCount(3)
                     );
                 }
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         private byte[] jpegBytes;
 
         private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
-        
+
         [Params(
             TestImages.Jpeg.BenchmarkSuite.Lake_Small444YCbCr,
             TestImages.Jpeg.BenchmarkSuite.BadRstProgressive518_Large444YCbCr,
@@ -87,7 +87,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         {
             using (var memoryStream = new MemoryStream(this.jpegBytes))
             {
-                using (var image = Image.Load<Rgba32>(memoryStream, new JpegDecoder(){ IgnoreMetadata = true}))
+                using (var image = Image.Load<Rgba32>(memoryStream, new JpegDecoder() { IgnoreMetadata = true }))
                 {
                     return new CoreSize(image.Width, image.Height);
                 }
@@ -115,5 +115,24 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         //                                 |                                             |            |            |           |        |          |           |          |          |             |
         //  'Decode Jpeg - System.Drawing' |       Jpg/issues/issue750-exif-tranform.jpg |  95.192 ms |  3.1762 ms | 0.1795 ms |   1.00 |     0.00 | 1750.0000 |        - |        - |  5492.63 KB |
         //      'Decode Jpeg - ImageSharp' |       Jpg/issues/issue750-exif-tranform.jpg | 230.158 ms | 48.8128 ms | 2.7580 ms |   2.42 |     0.02 |  312.5000 | 312.5000 | 312.5000 | 58834.66 KB |
+
+        // RESULTS (2019 April 23):
+        //
+        //BenchmarkDotNet=v0.11.5, OS=Windows 10.0.17763.437 (1809/October2018Update/Redstone5)
+        //Intel Core i7-6600U CPU 2.60GHz (Skylake), 1 CPU, 4 logical and 2 physical cores
+        //.NET Core SDK=2.2.202
+        //  [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //  Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+        //
+        //|                         Method |            TestImage |       Mean |      Error |     StdDev | Ratio | RatioSD |     Gen 0 | Gen 1 | Gen 2 |   Allocated |
+        //|------------------------------- |--------------------- |-----------:|-----------:|-----------:|------:|--------:|----------:|------:|------:|------------:|
+        //| 'Decode Jpeg - System.Drawing' | Jpg/b(...)e.jpg [21] |   6.957 ms |   9.618 ms |  0.5272 ms |  1.00 |    0.00 |   93.7500 |     - |     - |   205.83 KB |
+        //|     'Decode Jpeg - ImageSharp' | Jpg/b(...)e.jpg [21] |  18.348 ms |   8.876 ms |  0.4865 ms |  2.65 |    0.23 |         - |     - |     - |    14.49 KB |
+        //|                                |                      |            |            |            |       |         |           |       |       |             |
+        //| 'Decode Jpeg - System.Drawing' | Jpg/b(...)f.jpg [28] |  18.687 ms |  11.632 ms |  0.6376 ms |  1.00 |    0.00 |  343.7500 |     - |     - |   757.04 KB |
+        //|     'Decode Jpeg - ImageSharp' | Jpg/b(...)f.jpg [28] |  41.990 ms |  25.514 ms |  1.3985 ms |  2.25 |    0.10 |         - |     - |     - |    15.48 KB |
+        //|                                |                      |            |            |            |       |         |           |       |       |             |
+        //| 'Decode Jpeg - System.Drawing' | Jpg/i(...)e.jpg [43] | 477.265 ms | 732.126 ms | 40.1303 ms |  1.00 |    0.00 | 3000.0000 |     - |     - |  7403.76 KB |
+        //|     'Decode Jpeg - ImageSharp' | Jpg/i(...)e.jpg [43] | 348.545 ms |  91.480 ms |  5.0143 ms |  0.73 |    0.06 |         - |     - |     - | 35177.21 KB |
     }
 }
diff --git a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DoubleBufferedStreams.cs b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DoubleBufferedStreams.cs
index d4cbe81e16..b0834eb52d 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DoubleBufferedStreams.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/Jpeg/DoubleBufferedStreams.cs
@@ -19,8 +19,8 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
         private MemoryStream stream2;
         private MemoryStream stream3;
         private MemoryStream stream4;
-        DoubleBufferedStreamReader reader1;
-        DoubleBufferedStreamReader reader2;
+        private DoubleBufferedStreamReader reader1;
+        private DoubleBufferedStreamReader reader2;
 
         [GlobalSetup]
         public void CreateStreams()
@@ -102,6 +102,19 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
             return r;
         }
 
+        [Benchmark]
+        public int SimpleReadByte()
+        {
+            byte[] b = this.buffer;
+            int r = 0;
+            for (int i = 0; i < b.Length; i++)
+            {
+                r += b[i];
+            }
+
+            return r;
+        }
+
         private static byte[] CreateTestBytes()
         {
             byte[] buffer = new byte[DoubleBufferedStreamReader.ChunkLength * 3];
@@ -111,4 +124,29 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
             return buffer;
         }
     }
+
+    // RESULTS (2019 April 24):
+    //
+    //BenchmarkDotNet=v0.11.5, OS=Windows 10.0.17763.437 (1809/October2018Update/Redstone5)
+    //Intel Core i7-6600U CPU 2.60GHz (Skylake), 1 CPU, 4 logical and 2 physical cores
+    //.NET Core SDK=2.2.202
+    //  [Host] : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+    //  Clr    : .NET Framework 4.7.2 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.3362.0
+    //  Core   : .NET Core 2.1.9 (CoreCLR 4.6.27414.06, CoreFX 4.6.27415.01), 64bit RyuJIT
+    //
+    //IterationCount=3  LaunchCount=1  WarmupCount=3
+    //
+    //|                       Method |  Job | Runtime |     Mean |      Error |    StdDev | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated |
+    //|----------------------------- |----- |-------- |---------:|-----------:|----------:|------:|--------:|------:|------:|------:|----------:|
+    //|       StandardStreamReadByte |  Clr |     Clr | 96.71 us |  5.9950 us | 0.3286 us |  1.00 |    0.00 |     - |     - |     - |         - |
+    //|           StandardStreamRead |  Clr |     Clr | 77.73 us |  5.2284 us | 0.2866 us |  0.80 |    0.00 |     - |     - |     - |         - |
+    //| DoubleBufferedStreamReadByte |  Clr |     Clr | 23.17 us | 26.2354 us | 1.4381 us |  0.24 |    0.01 |     - |     - |     - |         - |
+    //|     DoubleBufferedStreamRead |  Clr |     Clr | 33.35 us |  3.4071 us | 0.1868 us |  0.34 |    0.00 |     - |     - |     - |         - |
+    //|               SimpleReadByte |  Clr |     Clr | 10.85 us |  0.4927 us | 0.0270 us |  0.11 |    0.00 |     - |     - |     - |         - |
+    //|                              |      |         |          |            |           |       |         |       |       |       |           |
+    //|       StandardStreamReadByte | Core |    Core | 75.35 us | 12.9789 us | 0.7114 us |  1.00 |    0.00 |     - |     - |     - |         - |
+    //|           StandardStreamRead | Core |    Core | 55.36 us |  1.4432 us | 0.0791 us |  0.73 |    0.01 |     - |     - |     - |         - |
+    //| DoubleBufferedStreamReadByte | Core |    Core | 21.47 us | 29.7076 us | 1.6284 us |  0.28 |    0.02 |     - |     - |     - |         - |
+    //|     DoubleBufferedStreamRead | Core |    Core | 29.67 us |  2.5988 us | 0.1424 us |  0.39 |    0.00 |     - |     - |     - |         - |
+    //|               SimpleReadByte | Core |    Core | 10.84 us |  0.7567 us | 0.0415 us |  0.14 |    0.00 |     - |     - |     - |         - |
 }
diff --git a/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs b/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
index 75bbf21a33..84e2d06167 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/MultiImageBenchmarkBase.cs
@@ -254,7 +254,7 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
 
             protected void ForEachSystemDrawingImage(Func<System.Drawing.Bitmap, MemoryStream, object> operation)
             {
-                using (MemoryStream workStream = new MemoryStream())
+                using (var workStream = new MemoryStream())
                 {
 
                     this.ForEachSystemDrawingImage(
diff --git a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
index e600af7851..9af4d57cff 100644
--- a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
+++ b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>
     <OutputType>Exe</OutputType>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <RootNamespace>SixLabors.ImageSharp.Benchmarks</RootNamespace>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 73f97bab38..0b727f30ce 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -27,8 +27,8 @@
   </ItemGroup>
   
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.9.2" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.0" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.12.0" />
+    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.console" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />

From 5283c6db6d7c01f2d01a84547afe1d44cee26c72 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Sat, 27 Apr 2019 16:36:23 +0200
Subject: [PATCH 095/223] Feature: adaptive histogram equalization (#673)

* first version of sliding window adaptive histogram equalization

* going now from top to bottom of the image, added more comments

* using memory allocator to create the histogram and the cdf

* mirroring rows which exceeds the borders

* mirroring also left and right borders

* gridsize and cliplimit are now parameters of the constructor

* using Parallel.For

* only applying clipping once, effect applying it multiple times is neglectable

* added abstract base class for histogram equalization, added option to enable / disable clipping

* small improvements

* clipLimit now in percent of the total number of pixels in the grid

* optimization: only calculating the cdf until the maximum histogram index

* fix: using configuration from the parameter instead of the default

* removed unnecessary loops in CalculateCdf, fixed typo in method name AddPixelsToHistogram

* added different approach for ahe: image is split up in tiles, cdf is computed for each tile. Grey value will be determined by interpolating between 4 tiles

* simplified interpolation between the tiles

* number of tiles is now fixed and depended on the width and height of the image

* moved calculating LUT's into separate method

* number of tiles is now part of the options and will be used with the sliding window approach also, so both methods are comparable

* removed no longer valid xml comment

* attempt fixing the borders

* refactoring to improve readability

* linear interpolation in the border tiles

* refactored processing the borders into separate methods

* fixing corner tiles

* fixed build errors

* fixing mistake during merge from upstream: setting test images to "update Resize reference output because of improved ResizeKernelMap calculations"

* using Parallel.ForEach for all inner tile calculations

* using Parallel.ForEach to calculate the lookup tables

* re-using pre allocated pixel row in GetPixelRow

* fixed issue with the border tiles, when tile width != tile height

* changed default value for ClipHistogram to false again

* alpha channel from the original image is now preserved

* added unit tests for adaptive histogram equalization

* Update External

* 2x faster adaptive tiled processor

* Remove double indexing and bounds checks

* Begin optimizing the global histogram

* Parallelize GlobalHistogramEqualizationProcessor

* Moving sliding window from left to right instead of from top to bottom

* The tile width and height is again depended on the image width: image.Width / Tiles

* Removed keeping track of the maximum histogram position

* Updated reference image for sliding window AHE for moving the sliding window from left to right

* Removed unnecessary call to Span.Clear(), all values are overwritten anyway

* Revert "Moving sliding window from left to right instead of from top to bottom"

This reverts commit 8f19e5edd23f13fd1ddf93b4e795f82e7f1334bb.

# Conflicts:
#	src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs

* Split GetPixelRow in two version: one which mirrors the edges (only needed in the borders of the images) and one which does not

* Refactoring and cleanup sliding window processor

* Added an upper limit of 100 tiles

* Performance tweaks

* Update External
---
 src/ImageSharp/Common/Helpers/ImageMaths.cs   |   1 -
 .../HistogramEqualizationExtension.cs         |  40 +-
 .../AdaptiveHistEqualizationProcessor.cs      | 545 ++++++++++++++++++
 .../AdaptiveHistEqualizationSWProcessor.cs    | 389 +++++++++++++
 .../GlobalHistogramEqualizationProcessor.cs   | 106 ++++
 .../HistogramEqualizationMethod.cs            |  26 +
 .../HistogramEqualizationOptions.cs           |  43 ++
 .../HistogramEqualizationProcessor.cs         | 138 +++--
 .../General/BasicMath/Round.cs                |  22 +
 .../HistogramEqualizationTests.cs             |  87 ++-
 tests/ImageSharp.Tests/TestImages.cs          |   1 +
 tests/Images/External                         |   2 +-
 .../Jpg/baseline/AsianCarvingLowContrast.jpg  |   3 +
 13 files changed, 1311 insertions(+), 92 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationMethod.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
 create mode 100644 tests/ImageSharp.Benchmarks/General/BasicMath/Round.cs
 create mode 100644 tests/Images/Input/Jpg/baseline/AsianCarvingLowContrast.jpg

diff --git a/src/ImageSharp/Common/Helpers/ImageMaths.cs b/src/ImageSharp/Common/Helpers/ImageMaths.cs
index 0c5b051809..64bcb11c9f 100644
--- a/src/ImageSharp/Common/Helpers/ImageMaths.cs
+++ b/src/ImageSharp/Common/Helpers/ImageMaths.cs
@@ -5,7 +5,6 @@ using System;
 using System.Runtime.CompilerServices;
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp
diff --git a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
index 8dabfcc05c..d967ef3622 100644
--- a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
+++ b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
@@ -12,25 +12,51 @@ namespace SixLabors.ImageSharp.Processing
     public static class HistogramEqualizationExtension
     {
         /// <summary>
-        /// Equalizes the histogram of an image to increases the global contrast using 65536 luminance levels.
+        /// Equalizes the histogram of an image to increases the contrast.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
         public static IImageProcessingContext<TPixel> HistogramEqualization<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
-            => HistogramEqualization(source, 65536);
+            => HistogramEqualization(source, HistogramEqualizationOptions.Default);
 
         /// <summary>
-        /// Equalizes the histogram of an image to increases the global contrast.
+        /// Equalizes the histogram of an image to increases the contrast.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="options">The histogram equalization options to use.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> HistogramEqualization<TPixel>(this IImageProcessingContext<TPixel> source, int luminanceLevels)
+        public static IImageProcessingContext<TPixel> HistogramEqualization<TPixel>(this IImageProcessingContext<TPixel> source, HistogramEqualizationOptions options)
             where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new HistogramEqualizationProcessor<TPixel>(luminanceLevels));
+            => source.ApplyProcessor(GetProcessor<TPixel>(options));
+
+        private static HistogramEqualizationProcessor<TPixel> GetProcessor<TPixel>(HistogramEqualizationOptions options)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            HistogramEqualizationProcessor<TPixel> processor;
+
+            switch (options.Method)
+            {
+                case HistogramEqualizationMethod.Global:
+                    processor = new GlobalHistogramEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage);
+                    break;
+
+                case HistogramEqualizationMethod.AdaptiveTileInterpolation:
+                    processor = new AdaptiveHistEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage, options.Tiles);
+                    break;
+
+                case HistogramEqualizationMethod.AdaptiveSlidingWindow:
+                    processor = new AdaptiveHistEqualizationSWProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage, options.Tiles);
+                    break;
+
+                default:
+                    processor = new GlobalHistogramEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage);
+                    break;
+            }
+
+            return processor;
+        }
     }
 }
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
new file mode 100644
index 0000000000..cb52a88b7b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
@@ -0,0 +1,545 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies an adaptive histogram equalization to the image. The image is split up in tiles. For each tile a cumulative distribution function (cdf) is calculated.
+    /// To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AdaptiveHistEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
+            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
+
+            this.Tiles = tiles;
+        }
+
+        /// <summary>
+        /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
+        /// </summary>
+        private int Tiles { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            int sourceWidth = source.Width;
+            int sourceHeight = source.Height;
+            int numberOfPixels = sourceWidth * sourceHeight;
+            int tileWidth = (int)MathF.Ceiling(sourceWidth / (float)this.Tiles);
+            int tileHeight = (int)MathF.Ceiling(sourceHeight / (float)this.Tiles);
+            int pixelsInTile = tileWidth * tileHeight;
+            int halfTileWidth = tileWidth / 2;
+            int halfTileHeight = tileHeight / 2;
+            int luminanceLevels = this.LuminanceLevels;
+
+            // The image is split up into tiles. For each tile the cumulative distribution function will be calculated.
+            using (var cdfData = new CdfTileData(configuration, sourceWidth, sourceHeight, this.Tiles, this.Tiles, tileWidth, tileHeight, luminanceLevels))
+            {
+                cdfData.CalculateLookupTables(source, this);
+
+                var tileYStartPositions = new List<(int y, int cdfY)>();
+                int cdfY = 0;
+                for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
+                {
+                    tileYStartPositions.Add((y, cdfY));
+                    cdfY++;
+                }
+
+                Parallel.For(
+                    0,
+                    tileYStartPositions.Count,
+                    new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism },
+                    index =>
+                {
+                    int cdfX = 0;
+                    int tileX = 0;
+                    int tileY = 0;
+                    int y = tileYStartPositions[index].y;
+                    int cdfYY = tileYStartPositions[index].cdfY;
+
+                    // It's unfortunate that we have to do this per iteration.
+                    ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
+
+                    cdfX = 0;
+                    for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
+                    {
+                        tileY = 0;
+                        int yEnd = Math.Min(y + tileHeight, sourceHeight);
+                        int xEnd = Math.Min(x + tileWidth, sourceWidth);
+                        for (int dy = y; dy < yEnd; dy++)
+                        {
+                            int dyOffSet = dy * sourceWidth;
+                            tileX = 0;
+                            for (int dx = x; dx < xEnd; dx++)
+                            {
+                                ref TPixel pixel = ref Unsafe.Add(ref sourceBase, dyOffSet + dx);
+                                float luminanceEqualized = InterpolateBetweenFourTiles(
+                                    pixel,
+                                    cdfData,
+                                    this.Tiles,
+                                    this.Tiles,
+                                    tileX,
+                                    tileY,
+                                    cdfX,
+                                    cdfYY,
+                                    tileWidth,
+                                    tileHeight,
+                                    luminanceLevels);
+
+                                pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                                tileX++;
+                            }
+
+                            tileY++;
+                        }
+
+                        cdfX++;
+                    }
+                });
+
+                ref TPixel pixelsBase = ref source.GetPixelReference(0, 0);
+
+                // Fix left column
+                ProcessBorderColumn(ref pixelsBase, cdfData, 0, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: 0, xEnd: halfTileWidth, luminanceLevels);
+
+                // Fix right column
+                int rightBorderStartX = ((this.Tiles - 1) * tileWidth) + halfTileWidth;
+                ProcessBorderColumn(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: rightBorderStartX, xEnd: sourceWidth, luminanceLevels);
+
+                // Fix top row
+                ProcessBorderRow(ref pixelsBase, cdfData, 0, sourceWidth, tileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Fix bottom row
+                int bottomBorderStartY = ((this.Tiles - 1) * tileHeight) + halfTileHeight;
+                ProcessBorderRow(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, tileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+
+                // Left top corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, 0, xStart: 0, xEnd: halfTileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Left bottom corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, this.Tiles - 1, xStart: 0, xEnd: halfTileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+
+                // Right top corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, 0, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Right bottom corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, this.Tiles - 1, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+            }
+        }
+
+        /// <summary>
+        /// Processes the part of a corner tile which was previously left out. It consists of 1 / 4 of a tile and does not need interpolation.
+        /// </summary>
+        /// <param name="pixelsBase">The output pixels base reference.</param>
+        /// <param name="cdfData">The lookup table to remap the grey values.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="cdfX">The x-position in the CDF lookup map.</param>
+        /// <param name="cdfY">The y-position in the CDF lookup map.</param>
+        /// <param name="xStart">X start position.</param>
+        /// <param name="xEnd">X end position.</param>
+        /// <param name="yStart">Y start position.</param>
+        /// <param name="yEnd">Y end position.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessCornerTile(
+            ref TPixel pixelsBase,
+            CdfTileData cdfData,
+            int sourceWidth,
+            int cdfX,
+            int cdfY,
+            int xStart,
+            int xEnd,
+            int yStart,
+            int yEnd,
+            int luminanceLevels)
+        {
+            for (int dy = yStart; dy < yEnd; dy++)
+            {
+                int dyOffSet = dy * sourceWidth;
+                for (int dx = xStart; dx < xEnd; dx++)
+                {
+                    ref TPixel pixel = ref Unsafe.Add(ref pixelsBase, dyOffSet + dx);
+                    float luminanceEqualized = cdfData.RemapGreyValue(cdfX, cdfY, GetLuminance(pixel, luminanceLevels));
+                    pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                }
+            }
+        }
+
+        /// <summary>
+        /// Processes a border column of the image which is half the size of the tile width.
+        /// </summary>
+        /// <param name="pixelBase">The output pixels reference.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="cdfX">The X index of the lookup table to use.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="sourceHeight">The source image height.</param>
+        /// <param name="tileWidth">The width of a tile.</param>
+        /// <param name="tileHeight">The height of a tile.</param>
+        /// <param name="xStart">X start position in the image.</param>
+        /// <param name="xEnd">X end position of the image.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessBorderColumn(
+            ref TPixel pixelBase,
+            CdfTileData cdfData,
+            int cdfX,
+            int sourceWidth,
+            int sourceHeight,
+            int tileWidth,
+            int tileHeight,
+            int xStart,
+            int xEnd,
+            int luminanceLevels)
+        {
+            int halfTileWidth = tileWidth / 2;
+            int halfTileHeight = tileHeight / 2;
+
+            int cdfY = 0;
+            for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
+            {
+                int yLimit = Math.Min(y + tileHeight, sourceHeight - 1);
+                int tileY = 0;
+                for (int dy = y; dy < yLimit; dy++)
+                {
+                    int dyOffSet = dy * sourceWidth;
+                    int tileX = halfTileWidth;
+                    for (int dx = xStart; dx < xEnd; dx++)
+                    {
+                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
+                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX, cdfY + 1, tileY, tileHeight, luminanceLevels);
+                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                        tileX++;
+                    }
+
+                    tileY++;
+                }
+
+                cdfY++;
+            }
+        }
+
+        /// <summary>
+        /// Processes a border row of the image which is half of the size of the tile height.
+        /// </summary>
+        /// <param name="pixelBase">The output pixels base reference.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="cdfY">The Y index of the lookup table to use.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="tileWidth">The width of a tile.</param>
+        /// <param name="yStart">Y start position in the image.</param>
+        /// <param name="yEnd">Y end position of the image.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessBorderRow(
+            ref TPixel pixelBase,
+            CdfTileData cdfData,
+            int cdfY,
+            int sourceWidth,
+            int tileWidth,
+            int yStart,
+            int yEnd,
+            int luminanceLevels)
+        {
+            int halfTileWidth = tileWidth / 2;
+
+            int cdfX = 0;
+            for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
+            {
+                int tileY = 0;
+                for (int dy = yStart; dy < yEnd; dy++)
+                {
+                    int dyOffSet = dy * sourceWidth;
+                    int tileX = 0;
+                    int xLimit = Math.Min(x + tileWidth, sourceWidth - 1);
+                    for (int dx = x; dx < xLimit; dx++)
+                    {
+                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
+                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX + 1, cdfY, tileX, tileWidth, luminanceLevels);
+                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                        tileX++;
+                    }
+
+                    tileY++;
+                }
+
+                cdfX++;
+            }
+        }
+
+        /// <summary>
+        /// Bilinear interpolation between four adjacent tiles.
+        /// </summary>
+        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="tileCountX">The number of tiles in the x-direction.</param>
+        /// <param name="tileCountY">The number of tiles in the y-direction.</param>
+        /// <param name="tileX">X position inside the tile.</param>
+        /// <param name="tileY">Y position inside the tile.</param>
+        /// <param name="cdfX">X index of the top left lookup table to use.</param>
+        /// <param name="cdfY">Y index of the top left lookup table to use.</param>
+        /// <param name="tileWidth">Width of one tile in pixels.</param>
+        /// <param name="tileHeight">Height of one tile in pixels.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <returns>A re-mapped grey value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float InterpolateBetweenFourTiles(
+           TPixel sourcePixel,
+           CdfTileData cdfData,
+           int tileCountX,
+           int tileCountY,
+           int tileX,
+           int tileY,
+           int cdfX,
+           int cdfY,
+           int tileWidth,
+           int tileHeight,
+           int luminanceLevels)
+        {
+            int luminance = GetLuminance(sourcePixel, luminanceLevels);
+            float tx = tileX / (float)(tileWidth - 1);
+            float ty = tileY / (float)(tileHeight - 1);
+
+            int yTop = cdfY;
+            int yBottom = Math.Min(tileCountY - 1, yTop + 1);
+            int xLeft = cdfX;
+            int xRight = Math.Min(tileCountX - 1, xLeft + 1);
+
+            float cdfLeftTopLuminance = cdfData.RemapGreyValue(xLeft, yTop, luminance);
+            float cdfRightTopLuminance = cdfData.RemapGreyValue(xRight, yTop, luminance);
+            float cdfLeftBottomLuminance = cdfData.RemapGreyValue(xLeft, yBottom, luminance);
+            float cdfRightBottomLuminance = cdfData.RemapGreyValue(xRight, yBottom, luminance);
+            return BilinearInterpolation(tx, ty, cdfLeftTopLuminance, cdfRightTopLuminance, cdfLeftBottomLuminance, cdfRightBottomLuminance);
+        }
+
+        /// <summary>
+        /// Linear interpolation between two tiles.
+        /// </summary>
+        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
+        /// <param name="cdfData">The CDF lookup map.</param>
+        /// <param name="tileX1">X position inside the first tile.</param>
+        /// <param name="tileY1">Y position inside the first tile.</param>
+        /// <param name="tileX2">X position inside the second tile.</param>
+        /// <param name="tileY2">Y position inside the second tile.</param>
+        /// <param name="tilePos">Position inside the tile.</param>
+        /// <param name="tileWidth">Width of the tile.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <returns>A re-mapped grey value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float InterpolateBetweenTwoTiles(
+            TPixel sourcePixel,
+            CdfTileData cdfData,
+            int tileX1,
+            int tileY1,
+            int tileX2,
+            int tileY2,
+            int tilePos,
+            int tileWidth,
+            int luminanceLevels)
+        {
+            int luminance = GetLuminance(sourcePixel, luminanceLevels);
+            float tx = tilePos / (float)(tileWidth - 1);
+
+            float cdfLuminance1 = cdfData.RemapGreyValue(tileX1, tileY1, luminance);
+            float cdfLuminance2 = cdfData.RemapGreyValue(tileX2, tileY2, luminance);
+            return LinearInterpolation(cdfLuminance1, cdfLuminance2, tx);
+        }
+
+        /// <summary>
+        /// Bilinear interpolation between four tiles.
+        /// </summary>
+        /// <param name="tx">The interpolation value in x direction in the range of [0, 1].</param>
+        /// <param name="ty">The interpolation value in y direction in the range of [0, 1].</param>
+        /// <param name="lt">Luminance from top left tile.</param>
+        /// <param name="rt">Luminance from right top tile.</param>
+        /// <param name="lb">Luminance from left bottom tile.</param>
+        /// <param name="rb">Luminance from right bottom tile.</param>
+        /// <returns>Interpolated Luminance.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float BilinearInterpolation(float tx, float ty, float lt, float rt, float lb, float rb)
+            => LinearInterpolation(LinearInterpolation(lt, rt, tx), LinearInterpolation(lb, rb, tx), ty);
+
+        /// <summary>
+        /// Linear interpolation between two grey values.
+        /// </summary>
+        /// <param name="left">The left value.</param>
+        /// <param name="right">The right value.</param>
+        /// <param name="t">The interpolation value between the two values in the range of [0, 1].</param>
+        /// <returns>The interpolated value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float LinearInterpolation(float left, float right, float t)
+            => left + ((right - left) * t);
+
+        /// <summary>
+        /// Contains the results of the cumulative distribution function for all tiles.
+        /// </summary>
+        private sealed class CdfTileData : IDisposable
+        {
+            private readonly Configuration configuration;
+            private readonly MemoryAllocator memoryAllocator;
+
+            // Used for storing the minimum value for each CDF entry.
+            private readonly Buffer2D<int> cdfMinBuffer2D;
+
+            // Used for storing the LUT for each CDF entry.
+            private readonly Buffer2D<int> cdfLutBuffer2D;
+            private readonly int pixelsInTile;
+            private readonly int sourceWidth;
+            private readonly int sourceHeight;
+            private readonly int tileWidth;
+            private readonly int tileHeight;
+            private readonly int luminanceLevels;
+            private readonly List<(int y, int cdfY)> tileYStartPositions;
+
+            public CdfTileData(
+                Configuration configuration,
+                int sourceWidth,
+                int sourceHeight,
+                int tileCountX,
+                int tileCountY,
+                int tileWidth,
+                int tileHeight,
+                int luminanceLevels)
+            {
+                this.configuration = configuration;
+                this.memoryAllocator = configuration.MemoryAllocator;
+                this.luminanceLevels = luminanceLevels;
+                this.cdfMinBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX, tileCountY);
+                this.cdfLutBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX * luminanceLevels, tileCountY);
+                this.sourceWidth = sourceWidth;
+                this.sourceHeight = sourceHeight;
+                this.tileWidth = tileWidth;
+                this.tileHeight = tileHeight;
+                this.pixelsInTile = tileWidth * tileHeight;
+
+                // Calculate the start positions and rent buffers.
+                this.tileYStartPositions = new List<(int y, int cdfY)>();
+                int cdfY = 0;
+                for (int y = 0; y < sourceHeight; y += tileHeight)
+                {
+                    this.tileYStartPositions.Add((y, cdfY));
+                    cdfY++;
+                }
+            }
+
+            public void CalculateLookupTables(ImageFrame<TPixel> source, HistogramEqualizationProcessor<TPixel> processor)
+            {
+                int sourceWidth = this.sourceWidth;
+                int sourceHeight = this.sourceHeight;
+                int tileWidth = this.tileWidth;
+                int tileHeight = this.tileHeight;
+                int luminanceLevels = this.luminanceLevels;
+                MemoryAllocator memoryAllocator = this.memoryAllocator;
+
+                Parallel.For(
+                    0,
+                    this.tileYStartPositions.Count,
+                    new ParallelOptions() { MaxDegreeOfParallelism = this.configuration.MaxDegreeOfParallelism },
+                    index =>
+                {
+                    int cdfX = 0;
+                    int cdfY = this.tileYStartPositions[index].cdfY;
+                    int y = this.tileYStartPositions[index].y;
+                    int endY = Math.Min(y + tileHeight, sourceHeight);
+                    ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
+                    ref int cdfMinBase = ref MemoryMarshal.GetReference(this.cdfMinBuffer2D.GetRowSpan(cdfY));
+
+                    using (IMemoryOwner<int> histogramBuffer = this.memoryAllocator.Allocate<int>(luminanceLevels))
+                    {
+                        Span<int> histogram = histogramBuffer.GetSpan();
+                        ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+
+                        for (int x = 0; x < sourceWidth; x += tileWidth)
+                        {
+                            histogram.Clear();
+                            ref int cdfBase = ref MemoryMarshal.GetReference(this.GetCdfLutSpan(cdfX, index));
+
+                            int xlimit = Math.Min(x + tileWidth, sourceWidth);
+                            for (int dy = y; dy < endY; dy++)
+                            {
+                                int dyOffset = dy * sourceWidth;
+                                for (int dx = x; dx < xlimit; dx++)
+                                {
+                                    int luminace = GetLuminance(Unsafe.Add(ref sourceBase, dyOffset + dx), luminanceLevels);
+                                    histogram[luminace]++;
+                                }
+                            }
+
+                            if (processor.ClipHistogramEnabled)
+                            {
+                                processor.ClipHistogram(histogram, processor.ClipLimitPercentage, this.pixelsInTile);
+                            }
+
+                            Unsafe.Add(ref cdfMinBase, cdfX) = processor.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
+
+                            cdfX++;
+                        }
+                    }
+                });
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public Span<int> GetCdfLutSpan(int tileX, int tileY) => this.cdfLutBuffer2D.GetRowSpan(tileY).Slice(tileX * this.luminanceLevels, this.luminanceLevels);
+
+            /// <summary>
+            /// Remaps the grey value with the cdf.
+            /// </summary>
+            /// <param name="tilesX">The tiles x-position.</param>
+            /// <param name="tilesY">The tiles y-position.</param>
+            /// <param name="luminance">The original luminance.</param>
+            /// <returns>The remapped luminance.</returns>
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public float RemapGreyValue(int tilesX, int tilesY, int luminance)
+            {
+                int cdfMin = this.cdfMinBuffer2D[tilesX, tilesY];
+                Span<int> cdfSpan = this.GetCdfLutSpan(tilesX, tilesY);
+                return (this.pixelsInTile - cdfMin) == 0
+                    ? cdfSpan[luminance] / this.pixelsInTile
+                    : cdfSpan[luminance] / (float)(this.pixelsInTile - cdfMin);
+            }
+
+            public void Dispose()
+            {
+                this.cdfMinBuffer2D.Dispose();
+                this.cdfLutBuffer2D.Dispose();
+            }
+        }
+    }
+}
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
new file mode 100644
index 0000000000..aa9b530c6d
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
@@ -0,0 +1,389 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies an adaptive histogram equalization to the image using an sliding window approach.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AdaptiveHistEqualizationSWProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
+            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
+
+            this.Tiles = tiles;
+        }
+
+        /// <summary>
+        /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
+        /// </summary>
+        private int Tiles { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
+            int numberOfPixels = source.Width * source.Height;
+            Span<TPixel> pixels = source.GetPixelSpan();
+
+            var parallelOptions = new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism };
+            int tileWidth = source.Width / this.Tiles;
+            int tileHeight = tileWidth;
+            int pixeInTile = tileWidth * tileHeight;
+            int halfTileHeight = tileHeight / 2;
+            int halfTileWidth = halfTileHeight;
+            var slidingWindowInfos = new SlidingWindowInfos(tileWidth, tileHeight, halfTileWidth, halfTileHeight, pixeInTile);
+
+            using (Buffer2D<TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Width, source.Height))
+            {
+                // Process the inner tiles, which do not require to check the borders.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: halfTileHeight,
+                        yEnd: source.Height - halfTileHeight,
+                        useFastPath: true,
+                        configuration));
+
+                // Process the left border of the image.
+                Parallel.For(
+                    0,
+                    halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the right border of the image.
+                Parallel.For(
+                    source.Width - halfTileWidth,
+                    source.Width,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the top border of the image.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: halfTileHeight,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the bottom border of the image.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: source.Height - halfTileHeight,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                Buffer2D<TPixel>.SwapOrCopyContent(source.PixelBuffer, targetPixels);
+            }
+        }
+
+        /// <summary>
+        /// Applies the sliding window equalization to one column of the image. The window is moved from top to bottom.
+        /// Moving the window one pixel down requires to remove one row from the top of the window from the histogram and
+        /// adding a new row at the bottom.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="memoryAllocator">The memory allocator.</param>
+        /// <param name="targetPixels">The target pixels.</param>
+        /// <param name="swInfos">Informations about the sliding window dimensions.</param>
+        /// <param name="yStart">The y start position.</param>
+        /// <param name="yEnd">The y end position.</param>
+        /// <param name="useFastPath">if set to true the borders of the image will not be checked.</param>
+        /// <param name="configuration">The configuration.</param>
+        /// <returns>Action Delegate.</returns>
+        private Action<int> ProcessSlidingWindow(
+            ImageFrame<TPixel> source,
+            MemoryAllocator memoryAllocator,
+            Buffer2D<TPixel> targetPixels,
+            SlidingWindowInfos swInfos,
+            int yStart,
+            int yEnd,
+            bool useFastPath,
+            Configuration configuration)
+        {
+            return x =>
+            {
+                using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                using (IMemoryOwner<int> histogramBufferCopy = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                using (IMemoryOwner<Vector4> pixelRowBuffer = memoryAllocator.Allocate<Vector4>(swInfos.TileWidth, AllocationOptions.Clean))
+                {
+                    Span<int> histogram = histogramBuffer.GetSpan();
+                    ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+
+                    Span<int> histogramCopy = histogramBufferCopy.GetSpan();
+                    ref int histogramCopyBase = ref MemoryMarshal.GetReference(histogramCopy);
+
+                    ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
+
+                    Span<Vector4> pixelRow = pixelRowBuffer.GetSpan();
+                    ref Vector4 pixelRowBase = ref MemoryMarshal.GetReference(pixelRow);
+
+                    // Build the initial histogram of grayscale values.
+                    for (int dy = yStart - swInfos.HalfTileHeight; dy < yStart + swInfos.HalfTileHeight; dy++)
+                    {
+                        if (useFastPath)
+                        {
+                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
+                        }
+                        else
+                        {
+                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
+                        }
+
+                        this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+                    }
+
+                    for (int y = yStart; y < yEnd; y++)
+                    {
+                        if (this.ClipHistogramEnabled)
+                        {
+                            // Clipping the histogram, but doing it on a copy to keep the original un-clipped values for the next iteration.
+                            histogram.CopyTo(histogramCopy);
+                            this.ClipHistogram(histogramCopy, this.ClipLimitPercentage, swInfos.PixeInTile);
+                        }
+
+                        // Calculate the cumulative distribution function, which will map each input pixel in the current tile to a new value.
+                        int cdfMin = this.ClipHistogramEnabled
+                        ? this.CalculateCdf(ref cdfBase, ref histogramCopyBase, histogram.Length - 1)
+                        : this.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
+
+                        float numberOfPixelsMinusCdfMin = swInfos.PixeInTile - cdfMin;
+
+                        // Map the current pixel to the new equalized value.
+                        int luminance = GetLuminance(source[x, y], this.LuminanceLevels);
+                        float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
+                        targetPixels[x, y].FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, source[x, y].ToVector4().W));
+
+                        // Remove top most row from the histogram, mirroring rows which exceeds the borders.
+                        if (useFastPath)
+                        {
+                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                        }
+                        else
+                        {
+                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                        }
+
+                        this.RemovePixelsFromHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+
+                        // Add new bottom row to the histogram, mirroring rows which exceeds the borders.
+                        if (useFastPath)
+                        {
+                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                        }
+                        else
+                        {
+                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                        }
+
+                        this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+                    }
+                }
+            };
+        }
+
+        /// <summary>
+        /// Get the a pixel row at a given position with a length of the tile width. Mirrors pixels which exceeds the edges.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
+        /// <param name="x">The x position.</param>
+        /// <param name="y">The y position.</param>
+        /// <param name="tileWidth">The width in pixels of a tile.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void CopyPixelRow(
+            ImageFrame<TPixel> source,
+            Span<Vector4> rowPixels,
+            int x,
+            int y,
+            int tileWidth,
+            Configuration configuration)
+        {
+            if (y < 0)
+            {
+                y = ImageMaths.FastAbs(y);
+            }
+            else if (y >= source.Height)
+            {
+                int diff = y - source.Height;
+                y = source.Height - diff - 1;
+            }
+
+            // Special cases for the left and the right border where GetPixelRowSpan can not be used.
+            if (x < 0)
+            {
+                rowPixels.Clear();
+                int idx = 0;
+                for (int dx = x; dx < x + tileWidth; dx++)
+                {
+                    rowPixels[idx] = source[ImageMaths.FastAbs(dx), y].ToVector4();
+                    idx++;
+                }
+
+                return;
+            }
+            else if (x + tileWidth > source.Width)
+            {
+                rowPixels.Clear();
+                int idx = 0;
+                for (int dx = x; dx < x + tileWidth; dx++)
+                {
+                    if (dx >= source.Width)
+                    {
+                        int diff = dx - source.Width;
+                        rowPixels[idx] = source[dx - diff - 1, y].ToVector4();
+                    }
+                    else
+                    {
+                        rowPixels[idx] = source[dx, y].ToVector4();
+                    }
+
+                    idx++;
+                }
+
+                return;
+            }
+
+            this.CopyPixelRowFast(source, rowPixels, x, y, tileWidth, configuration);
+        }
+
+        /// <summary>
+        /// Get the a pixel row at a given position with a length of the tile width.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
+        /// <param name="x">The x position.</param>
+        /// <param name="y">The y position.</param>
+        /// <param name="tileWidth">The width in pixels of a tile.</param>
+        /// <param name="configuration">The configuration.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void CopyPixelRowFast(
+            ImageFrame<TPixel> source,
+            Span<Vector4> rowPixels,
+            int x,
+            int y,
+            int tileWidth,
+            Configuration configuration)
+            => PixelOperations<TPixel>.Instance.ToVector4(configuration, source.GetPixelRowSpan(y).Slice(start: x, length: tileWidth), rowPixels);
+
+        /// <summary>
+        /// Adds a column of grey values to the histogram.
+        /// </summary>
+        /// <param name="greyValuesBase">The reference to the span of grey values to add.</param>
+        /// <param name="histogramBase">The reference to the histogram span.</param>
+        /// <param name="luminanceLevels">The number of different luminance levels.</param>
+        /// <param name="length">The grey values span length.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void AddPixelsToHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
+        {
+            for (int idx = 0; idx < length; idx++)
+            {
+                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
+                Unsafe.Add(ref histogramBase, luminance)++;
+            }
+        }
+
+        /// <summary>
+        /// Removes a column of grey values from the histogram.
+        /// </summary>
+        /// <param name="greyValuesBase">The reference to the span of grey values to remove.</param>
+        /// <param name="histogramBase">The reference to the histogram span.</param>
+        /// <param name="luminanceLevels">The number of different luminance levels.</param>
+        /// <param name="length">The grey values span length.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void RemovePixelsFromHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
+        {
+            for (int idx = 0; idx < length; idx++)
+            {
+                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
+                Unsafe.Add(ref histogramBase, luminance)--;
+            }
+        }
+
+        private class SlidingWindowInfos
+        {
+            public SlidingWindowInfos(int tileWidth, int tileHeight, int halfTileWidth, int halfTileHeight, int pixeInTile)
+            {
+                this.TileWidth = tileWidth;
+                this.TileHeight = tileHeight;
+                this.HalfTileWidth = halfTileWidth;
+                this.HalfTileHeight = halfTileHeight;
+                this.PixeInTile = pixeInTile;
+            }
+
+            public int TileWidth { get; private set; }
+
+            public int TileHeight { get; private set; }
+
+            public int PixeInTile { get; private set; }
+
+            public int HalfTileWidth { get; private set; }
+
+            public int HalfTileHeight { get; private set; }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
new file mode 100644
index 0000000000..aadde2424b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
@@ -0,0 +1,106 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies a global histogram equalization to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class GlobalHistogramEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GlobalHistogramEqualizationProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels. Histogram bins which exceed this limit, will be capped at this value.</param>
+        public GlobalHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
+            int numberOfPixels = source.Width * source.Height;
+            Span<TPixel> pixels = source.GetPixelSpan();
+            var workingRect = new Rectangle(0, 0, source.Width, source.Height);
+
+            using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            {
+                // Build the histogram of the grayscale levels.
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                    {
+                        ref int histogramBase = ref MemoryMarshal.GetReference(histogramBuffer.GetSpan());
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
+
+                            for (int x = 0; x < workingRect.Width; x++)
+                            {
+                                int luminance = GetLuminance(Unsafe.Add(ref pixelBase, x), this.LuminanceLevels);
+                                Unsafe.Add(ref histogramBase, luminance)++;
+                            }
+                        }
+                    });
+
+                Span<int> histogram = histogramBuffer.GetSpan();
+                if (this.ClipHistogramEnabled)
+                {
+                    this.ClipHistogram(histogram, this.ClipLimitPercentage, numberOfPixels);
+                }
+
+                // Calculate the cumulative distribution function, which will map each input pixel to a new value.
+                int cdfMin = this.CalculateCdf(
+                    ref MemoryMarshal.GetReference(cdfBuffer.GetSpan()),
+                    ref MemoryMarshal.GetReference(histogram),
+                    histogram.Length - 1);
+
+                float numberOfPixelsMinusCdfMin = numberOfPixels - cdfMin;
+
+                // Apply the cdf to each pixel of the image
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                    {
+                        ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
+
+                            for (int x = 0; x < workingRect.Width; x++)
+                            {
+                                ref TPixel pixel = ref Unsafe.Add(ref pixelBase, x);
+                                int luminance = GetLuminance(pixel, this.LuminanceLevels);
+                                float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
+                                pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                            }
+                        }
+                    });
+            }
+        }
+    }
+}
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationMethod.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationMethod.cs
new file mode 100644
index 0000000000..641587c394
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationMethod.cs
@@ -0,0 +1,26 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Enumerates the different types of defined histogram equalization methods.
+    /// </summary>
+    public enum HistogramEqualizationMethod : int
+    {
+        /// <summary>
+        /// A global histogram equalization.
+        /// </summary>
+        Global,
+
+        /// <summary>
+        /// Adaptive histogram equalization using a tile interpolation approach.
+        /// </summary>
+        AdaptiveTileInterpolation,
+
+        /// <summary>
+        /// Adaptive histogram equalization using sliding window. Slower then the tile interpolation mode, but can yield to better results.
+        /// </summary>
+        AdaptiveSlidingWindow,
+    }
+}
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
new file mode 100644
index 0000000000..0d1a378361
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
@@ -0,0 +1,43 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Data container providing the different options for the histogram equalization.
+    /// </summary>
+    public class HistogramEqualizationOptions
+    {
+        /// <summary>
+        /// Gets the default <see cref="HistogramEqualizationOptions"/> instance.
+        /// </summary>
+        public static HistogramEqualizationOptions Default { get; } = new HistogramEqualizationOptions();
+
+        /// <summary>
+        /// Gets or sets the histogram equalization method to use. Defaults to global histogram equalization.
+        /// </summary>
+        public HistogramEqualizationMethod Method { get; set; } = HistogramEqualizationMethod.Global;
+
+        /// <summary>
+        /// Gets or sets the number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images. Defaults to 256.
+        /// </summary>
+        public int LuminanceLevels { get; set; } = 256;
+
+        /// <summary>
+        /// Gets or sets a value indicating whether to clip the histogram bins at a specific value. Defaults to false.
+        /// </summary>
+        public bool ClipHistogram { get; set; } = false;
+
+        /// <summary>
+        /// Gets or sets the histogram clip limit in percent of the total pixels in a tile. Histogram bins which exceed this limit, will be capped at this value.
+        /// Defaults to 0.035f.
+        /// </summary>
+        public float ClipLimitPercentage { get; set; } = 0.035f;
+
+        /// <summary>
+        /// Gets or sets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization. Defaults to 10.
+        /// </summary>
+        public int Tiles { get; set; } = 10;
+    }
+}
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
index 580adc7fe9..fd1b6b9784 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
@@ -2,34 +2,38 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Buffers;
 using System.Numerics;
 using System.Runtime.CompilerServices;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Normalization
 {
     /// <summary>
-    /// Applies a global histogram equalization to the image.
+    /// Defines a processor that normalizes the histogram of an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class HistogramEqualizationProcessor<TPixel> : ImageProcessor<TPixel>
+    internal abstract class HistogramEqualizationProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
+        private readonly float luminanceLevelsFloat;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="HistogramEqualizationProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
-        public HistogramEqualizationProcessor(int luminanceLevels)
+        /// <param name="clipHistogram">Indicates, if histogram bins should be clipped.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        protected HistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
         {
             Guard.MustBeGreaterThan(luminanceLevels, 0, nameof(luminanceLevels));
+            Guard.MustBeGreaterThan(clipLimitPercentage, 0F, nameof(clipLimitPercentage));
 
             this.LuminanceLevels = luminanceLevels;
+            this.luminanceLevelsFloat = luminanceLevels;
+            this.ClipHistogramEnabled = clipHistogram;
+            this.ClipLimitPercentage = clipLimitPercentage;
         }
 
         /// <summary>
@@ -37,77 +41,77 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// </summary>
         public int LuminanceLevels { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <summary>
+        /// Gets a value indicating whether to clip the histogram bins at a specific value.
+        /// </summary>
+        public bool ClipHistogramEnabled { get; }
+
+        /// <summary>
+        /// Gets the histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.
+        /// </summary>
+        public float ClipLimitPercentage { get; }
+
+        /// <summary>
+        /// Calculates the cumulative distribution function.
+        /// </summary>
+        /// <param name="cdfBase">The reference to the array holding the cdf.</param>
+        /// <param name="histogramBase">The reference to the histogram of the input image.</param>
+        /// <param name="maxIdx">Index of the maximum of the histogram.</param>
+        /// <returns>The first none zero value of the cdf.</returns>
+        public int CalculateCdf(ref int cdfBase, ref int histogramBase, int maxIdx)
         {
-            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
-            int numberOfPixels = source.Width * source.Height;
-            Span<TPixel> pixels = source.GetPixelSpan();
+            int histSum = 0;
+            int cdfMin = 0;
+            bool cdfMinFound = false;
 
-            // Build the histogram of the grayscale levels.
-            using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-            using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            for (int i = 0; i <= maxIdx; i++)
             {
-                Span<int> histogram = histogramBuffer.GetSpan();
-                for (int i = 0; i < pixels.Length; i++)
+                histSum += Unsafe.Add(ref histogramBase, i);
+                if (!cdfMinFound && histSum != 0)
                 {
-                    TPixel sourcePixel = pixels[i];
-                    int luminance = this.GetLuminance(sourcePixel, this.LuminanceLevels);
-                    histogram[luminance]++;
+                    cdfMin = histSum;
+                    cdfMinFound = true;
                 }
 
-                // Calculate the cumulative distribution function, which will map each input pixel to a new value.
-                Span<int> cdf = cdfBuffer.GetSpan();
-                int cdfMin = this.CalculateCdf(cdf, histogram);
-
-                // Apply the cdf to each pixel of the image
-                float numberOfPixelsMinusCdfMin = numberOfPixels - cdfMin;
-                for (int i = 0; i < pixels.Length; i++)
-                {
-                    TPixel sourcePixel = pixels[i];
-
-                    int luminance = this.GetLuminance(sourcePixel, this.LuminanceLevels);
-                    float luminanceEqualized = cdf[luminance] / numberOfPixelsMinusCdfMin;
-
-                    pixels[i].FromVector4(new Vector4(luminanceEqualized));
-                }
+                // Creating the lookup table: subtracting cdf min, so we do not need to do that inside the for loop.
+                Unsafe.Add(ref cdfBase, i) = Math.Max(0, histSum - cdfMin);
             }
+
+            return cdfMin;
         }
 
         /// <summary>
-        /// Calculates the cumulative distribution function.
+        /// AHE tends to over amplify the contrast in near-constant regions of the image, since the histogram in such regions is highly concentrated.
+        /// Clipping the histogram is meant to reduce this effect, by cutting of histogram bin's which exceed a certain amount and redistribute
+        /// the values over the clip limit to all other bins equally.
         /// </summary>
-        /// <param name="cdf">The array holding the cdf.</param>
-        /// <param name="histogram">The histogram of the input image.</param>
-        /// <returns>The first none zero value of the cdf.</returns>
-        private int CalculateCdf(Span<int> cdf, Span<int> histogram)
+        /// <param name="histogram">The histogram to apply the clipping.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="pixelCount">The numbers of pixels inside the tile.</param>
+        public void ClipHistogram(Span<int> histogram, float clipLimitPercentage, int pixelCount)
         {
-            // Calculate the cumulative histogram
-            int histSum = 0;
-            for (int i = 0; i < histogram.Length; i++)
-            {
-                histSum += histogram[i];
-                cdf[i] = histSum;
-            }
+            int clipLimit = (int)MathF.Round(pixelCount * clipLimitPercentage);
+            int sumOverClip = 0;
+            ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
 
-            // Get the first none zero value of the cumulative histogram
-            int cdfMin = 0;
             for (int i = 0; i < histogram.Length; i++)
             {
-                if (cdf[i] != 0)
+                ref int histogramLevel = ref Unsafe.Add(ref histogramBase, i);
+                if (histogramLevel > clipLimit)
                 {
-                    cdfMin = cdf[i];
-                    break;
+                    sumOverClip += histogramLevel - clipLimit;
+                    histogramLevel = clipLimit;
                 }
             }
 
-            // Creating the lookup table: subtracting cdf min, so we do not need to do that inside the for loop
-            for (int i = 0; i < histogram.Length; i++)
+            int addToEachBin = sumOverClip > 0 ? (int)MathF.Floor(sumOverClip / this.luminanceLevelsFloat) : 0;
+            if (addToEachBin > 0)
             {
-                cdf[i] = Math.Max(0, cdf[i] - cdfMin);
+                for (int i = 0; i < histogram.Length; i++)
+                {
+                    Unsafe.Add(ref histogramBase, i) += addToEachBin;
+                }
             }
-
-            return cdfMin;
         }
 
         /// <summary>
@@ -116,13 +120,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <param name="sourcePixel">The pixel to get the luminance from</param>
         /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        private int GetLuminance(TPixel sourcePixel, int luminanceLevels)
+        public static int GetLuminance(TPixel sourcePixel, int luminanceLevels)
         {
-            // Convert to grayscale using ITU-R Recommendation BT.709
             var vector = sourcePixel.ToVector4();
-            int luminance = Convert.ToInt32(((.2126F * vector.X) + (.7152F * vector.Y) + (.0722F * vector.Y)) * (luminanceLevels - 1));
-
-            return luminance;
+            return GetLuminance(ref vector, luminanceLevels);
         }
+
+        /// <summary>
+        /// Convert the pixel values to grayscale using ITU-R Recommendation BT.709.
+        /// </summary>
+        /// <param name="vector">The vector to get the luminance from</param>
+        /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static int GetLuminance(ref Vector4 vector, int luminanceLevels)
+            => (int)MathF.Round(((.2126F * vector.X) + (.7152F * vector.Y) + (.0722F * vector.Y)) * (luminanceLevels - 1));
     }
-}
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/General/BasicMath/Round.cs b/tests/ImageSharp.Benchmarks/General/BasicMath/Round.cs
new file mode 100644
index 0000000000..2c18b2972c
--- /dev/null
+++ b/tests/ImageSharp.Benchmarks/General/BasicMath/Round.cs
@@ -0,0 +1,22 @@
+using System;
+using BenchmarkDotNet.Attributes;
+
+namespace SixLabors.ImageSharp.Benchmarks.General.BasicMath
+{
+    public class Round
+    {
+        private const float input = .51F;
+
+        [Benchmark]
+        public int ConvertTo() => Convert.ToInt32(input);
+
+        [Benchmark]
+        public int MathRound() => (int)Math.Round(input);
+
+        // Results 20th Jan 2019
+        //    Method |      Mean |     Error |    StdDev |    Median |
+        //---------- |----------:|----------:|----------:|----------:|
+        // ConvertTo | 3.1967 ns | 0.1234 ns | 0.2129 ns | 3.2340 ns |
+        // MathRound | 0.0528 ns | 0.0374 ns | 0.1079 ns | 0.0000 ns |
+    }
+}
diff --git a/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs b/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
index 1595ed32cc..84d592bd96 100644
--- a/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
@@ -3,12 +3,16 @@
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Normalization;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Normalization
 {
     public class HistogramEqualizationTests
     {
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.0456F);
+
         [Theory]
         [InlineData(256)]
         [InlineData(65536)]
@@ -27,18 +31,19 @@ namespace SixLabors.ImageSharp.Tests.Processing.Normalization
                 70,  87,  69,  68,  65,  73,  78,  90
             };
 
-            var image = new Image<Rgba32>(8, 8);
-            for (int y = 0; y < 8; y++)
+            using (var image = new Image<Rgba32>(8, 8))
             {
-                for (int x = 0; x < 8; x++)
+                for (int y = 0; y < 8; y++)
                 {
-                    byte luminance = pixels[y * 8 + x];
-                    image[x, y] = new Rgba32(luminance, luminance, luminance);
+                    for (int x = 0; x < 8; x++)
+                    {
+                        byte luminance = pixels[(y * 8) + x];
+                        image[x, y] = new Rgba32(luminance, luminance, luminance);
+                    }
                 }
-            }
 
-            byte[] expected = new byte[]
-            {
+                byte[] expected = new byte[]
+                {
                 0,    12,   53,   32,  146,   53,  174,   53,
                 57,   32,   12,  227,  219,  202,   32,  154,
                 65,   85,   93,  239,  251,  227,   65,  158,
@@ -47,22 +52,66 @@ namespace SixLabors.ImageSharp.Tests.Processing.Normalization
                 117, 190,   36,  190,  178,   93,   20,  170,
                 130, 202,   73,   20,   12,   53,   85,  194,
                 146, 206,  130,  117,   85,  166,  182,  215
-            };
+                };
 
-            // Act
-            image.Mutate(x => x.HistogramEqualization(luminanceLevels));
+                // Act
+                image.Mutate(x => x.HistogramEqualization(new HistogramEqualizationOptions()
+                {
+                    LuminanceLevels = luminanceLevels
+                }));
 
-            // Assert
-            for (int y = 0; y < 8; y++)
-            {
-                for (int x = 0; x < 8; x++)
+                // Assert
+                for (int y = 0; y < 8; y++)
                 {
-                    Rgba32 actual = image[x, y];
-                    Assert.Equal(expected[y * 8 + x], actual.R);
-                    Assert.Equal(expected[y * 8 + x], actual.G);
-                    Assert.Equal(expected[y * 8 + x], actual.B);
+                    for (int x = 0; x < 8; x++)
+                    {
+                        Rgba32 actual = image[x, y];
+                        Assert.Equal(expected[(y * 8) + x], actual.R);
+                        Assert.Equal(expected[(y * 8) + x], actual.G);
+                        Assert.Equal(expected[(y * 8) + x], actual.B);
+                    }
                 }
             }
         }
+
+        [Theory]
+        [WithFile(TestImages.Jpeg.Baseline.LowContrast, PixelTypes.Rgba32)]
+        public void Adaptive_SlidingWindow_15Tiles_WithClipping<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var options = new HistogramEqualizationOptions()
+                {
+                    Method = HistogramEqualizationMethod.AdaptiveSlidingWindow,
+                    LuminanceLevels = 256,
+                    ClipHistogram = true,
+                    Tiles = 15
+                };
+                image.Mutate(x => x.HistogramEqualization(options));
+                image.DebugSave(provider);
+                image.CompareToReferenceOutput(ValidatorComparer, provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(TestImages.Jpeg.Baseline.LowContrast, PixelTypes.Rgba32)]
+        public void Adaptive_TileInterpolation_10Tiles_WithClipping<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var options = new HistogramEqualizationOptions()
+                {
+                    Method = HistogramEqualizationMethod.AdaptiveTileInterpolation,
+                    LuminanceLevels = 256,
+                    ClipHistogram = true,
+                    Tiles = 10
+                };
+                image.Mutate(x => x.HistogramEqualization(options));
+                image.DebugSave(provider);
+                image.CompareToReferenceOutput(ValidatorComparer, provider);
+            }
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 8b2fd2e7f8..23bebd6213 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -141,6 +141,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string Testorig420 = "Jpg/baseline/testorig.jpg";
                 public const string MultiScanBaselineCMYK = "Jpg/baseline/MultiScanBaselineCMYK.jpg";
                 public const string Ratio1x1 = "Jpg/baseline/ratio-1x1.jpg";
+                public const string LowContrast = "Jpg/baseline/AsianCarvingLowContrast.jpg";
                 public const string Testorig12bit = "Jpg/baseline/testorig12.jpg";
                 public const string YcckSubsample1222 = "Jpg/baseline/ycck-subsample-1222.jpg";
 
diff --git a/tests/Images/External b/tests/Images/External
index 8693e2fd45..1ca5154996 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 8693e2fd4577a9ac1a749da8db564095b5a05389
+Subproject commit 1ca515499663e8b0b7c924a49b8d212f7447bdb0
diff --git a/tests/Images/Input/Jpg/baseline/AsianCarvingLowContrast.jpg b/tests/Images/Input/Jpg/baseline/AsianCarvingLowContrast.jpg
new file mode 100644
index 0000000000..d16a2864d1
--- /dev/null
+++ b/tests/Images/Input/Jpg/baseline/AsianCarvingLowContrast.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:50f6359d228079ec5e6ead84046119eda84136026c1651c753e6d270405cd4b7
+size 187216

From 570849085be1f3a449eb3aad73d5aab75778b783 Mon Sep 17 00:00:00 2001
From: BorisTheBrave <boris@boristhebrave.com>
Date: Sat, 27 Apr 2019 23:27:04 +0100
Subject: [PATCH 096/223] ImageBrush shouldn't Dispose of the image it is
 using. (#883)

Fixes #881
---
 .../Processing/ImageBrush{TPixel}.cs          |  1 -
 .../Drawing/FillImageBrushTests.cs            | 36 +++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs

diff --git a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
index 1ef4bb9ec9..cfb3b2ea4f 100644
--- a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
@@ -113,7 +113,6 @@ namespace SixLabors.ImageSharp.Processing
             /// <inheritdoc />
             public override void Dispose()
             {
-                this.source.Dispose();
             }
 
             /// <inheritdoc />
diff --git a/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
new file mode 100644
index 0000000000..772f62d5cc
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
@@ -0,0 +1,36 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
+using SixLabors.Shapes;
+
+using Xunit;
+
+// ReSharper disable InconsistentNaming
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class FillImageBrushTests
+    {
+        [Fact]
+        public void DoesNotDisposeImage()
+        {
+            using (var src = new Image<Rgba32>(5, 5))
+            {
+                var brush = new ImageBrush<Rgba32>(src);
+                using (var dest = new Image<Rgba32>(10, 10))
+                {
+                    dest.Mutate(c => c.Fill(brush, new Rectangle(0, 0, 10, 10)));
+                    dest.Mutate(c => c.Fill(brush, new Rectangle(0, 0, 10, 10)));
+                }
+            }
+        }
+    }
+}
\ No newline at end of file

From 764a73b6310d4fb21af72a90d3704f499fccebb5 Mon Sep 17 00:00:00 2001
From: Anthony Truskinger <anthony.truskinger@gmail.com>
Date: Tue, 30 Apr 2019 21:55:44 +1000
Subject: [PATCH 097/223] Now throws a better excpetion DrawImage source does
 not overlap target (#877)

* No longer throws when DrawImage source does not overlap target

Previously, when DrawImage was used to overlay an image, in cases where the source image did not overlap the target image, a very confusing error was reported: "System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: MaxDegreeOfParallelism"

Now, when this case happens, the DrawImage method will simply not affect the target image, which is the same way FillRegionProcessor handles such cases.

ParallelHelper.IterRows also now does more validation of the input rectangle so that any further cases of this kind of problem throw a more relvant exception. Note I switched from DebugGuard to Guard because IterRows is a public API and thus should always validate its inputs.

Fixes #875

* Refines DrawImage non-overlap error logic

Adresses PR feedback in #877.

Changes DrawImage shortcut to be less than or equal to. Also changes maxX calculation to use `Right` over `Width`. This is a semantic change that reflects intention better. No actual change because Top,Left for that rectanngle should always be 0,0.

And adds more informative argument names to ParallelHelper.IterRows error message.

* Non-overlapping DrawImage now throws

Adressing PR feedback from #877

DrawImage now throws when the source image does not overlap, with a useful error message.

Also improved the error messages for IterRows (and added validation to the other IterRows method)

* DrawImage overlap test changed to support RELEASE

The tests on the CI server are run in RELEASE which wrap the expected exception with an ImageProcessingException.

* Adress feedback for DrawImage exception

DrawImage throws an ImageProcessor exception which makes it easier to catch.

And reverted IterRows to use Guard helpers
---
 .../Processors/Drawing/DrawImageProcessor.cs  |  8 +++-
 .../Common/ParallelUtils/ParallelHelper.cs    | 17 +++++++-
 .../ImageSharp.Tests/Drawing/DrawImageTest.cs | 42 +++++++++++++++++++
 .../Helpers/ParallelHelperTests.cs            | 35 ++++++++++++++++
 4 files changed, 100 insertions(+), 2 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
index 0957904c62..6c03537eb3 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
@@ -71,7 +71,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             Rectangle bounds = targetImage.Bounds();
 
             int minX = Math.Max(this.Location.X, sourceRectangle.X);
-            int maxX = Math.Min(this.Location.X + bounds.Width, sourceRectangle.Width);
+            int maxX = Math.Min(this.Location.X + bounds.Width, sourceRectangle.Right);
             int targetX = minX - this.Location.X;
 
             int minY = Math.Max(this.Location.Y, sourceRectangle.Y);
@@ -81,6 +81,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 
             var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
 
+            // not a valid operation because rectangle does not overlap with this image.
+            if (workingRect.Width <= 0 || workingRect.Height <= 0)
+            {
+                throw new ImageProcessingException("Cannot draw image because the source image does not overlap the target image.");
+            }
+
             ParallelHelper.IterateRows(
                 workingRect,
                 configuration,
diff --git a/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs b/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
index a930b8390f..2c2d045a57 100644
--- a/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
+++ b/src/ImageSharp/Common/ParallelUtils/ParallelHelper.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.ParallelUtils
             in ParallelExecutionSettings parallelSettings,
             Action<RowInterval> body)
         {
-            DebugGuard.MustBeGreaterThan(rectangle.Width, 0, nameof(rectangle));
+            ValidateRectangle(rectangle);
 
             int maxSteps = DivideCeil(rectangle.Width * rectangle.Height, parallelSettings.MinimumPixelsProcessedPerTask);
 
@@ -87,6 +87,8 @@ namespace SixLabors.ImageSharp.ParallelUtils
             Action<RowInterval, Memory<T>> body)
             where T : unmanaged
         {
+            ValidateRectangle(rectangle);
+
             int maxSteps = DivideCeil(rectangle.Width * rectangle.Height, parallelSettings.MinimumPixelsProcessedPerTask);
 
             int numOfSteps = Math.Min(parallelSettings.MaxDegreeOfParallelism, maxSteps);
@@ -142,5 +144,18 @@ namespace SixLabors.ImageSharp.ParallelUtils
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private static int DivideCeil(int dividend, int divisor) => 1 + ((dividend - 1) / divisor);
+
+        private static void ValidateRectangle(Rectangle rectangle)
+        {
+            Guard.MustBeGreaterThan(
+                rectangle.Width,
+                0,
+                $"{nameof(rectangle)}.{nameof(rectangle.Width)}");
+
+            Guard.MustBeGreaterThan(
+                rectangle.Height,
+                0,
+                $"{nameof(rectangle)}.{nameof(rectangle.Height)}");
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
index 374454afba..b07f508834 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
@@ -131,6 +131,48 @@ namespace SixLabors.ImageSharp.Tests
                 background.DebugSave(provider, testOutputDetails: "Positive");
             }
         }
+        [Theory]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
+        public void ImageShouldHandlePositiveLocationTruncatedOverlay(TestImageProvider<Rgba32> provider)
+        {
+            using (Image<Rgba32> background = provider.GetImage())
+            using (var overlay = new Image<Rgba32>(50, 50))
+            {
+                overlay.Mutate(x => x.Fill(Rgba32.Black));
+
+                const int xy = 75;
+                Rgba32 backgroundPixel = background[xy - 1, xy - 1];
+                Rgba32 overlayPixel = overlay[0, 0];
+
+                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
+
+                Assert.Equal(Rgba32.White, backgroundPixel);
+                Assert.Equal(overlayPixel, background[xy, xy]);
+
+                background.DebugSave(provider, testOutputDetails: "PositiveTruncated");
+            }
+        }
+
+        [Theory]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, -30)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, -30)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, 130)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, 130)]
+        public void NonOverlappingImageThrows(TestImageProvider<Rgba32> provider, int x, int y)
+        {
+            using (Image<Rgba32> background = provider.GetImage())
+            using (var overlay = new Image<Rgba32>(Configuration.Default, 10, 10, Rgba32.Black))
+            {
+                ImageProcessingException ex = Assert.Throws<ImageProcessingException>(Test);
+
+                Assert.Contains("does not overlap", ex.ToString());
+
+                void Test()
+                {
+                    background.Mutate(context => context.DrawImage(overlay, new Point(x, y), GraphicsOptions.Default));
+                }
+            }
+        }
 
         private static void VerifyImage<TPixel>(
             TestImageProvider<TPixel> provider,
diff --git a/tests/ImageSharp.Tests/Helpers/ParallelHelperTests.cs b/tests/ImageSharp.Tests/Helpers/ParallelHelperTests.cs
index ef6b133f75..ee309e0e30 100644
--- a/tests/ImageSharp.Tests/Helpers/ParallelHelperTests.cs
+++ b/tests/ImageSharp.Tests/Helpers/ParallelHelperTests.cs
@@ -9,6 +9,7 @@ using System.Threading;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 using SixLabors.Primitives;
 
@@ -334,5 +335,39 @@ namespace SixLabors.ImageSharp.Tests.Helpers
                 TestImageExtensions.CompareBuffers(expected.Span, actual.Span);
             }
         }
+
+        [Theory]
+        [InlineData(0, 10)]
+        [InlineData(10, 0)]
+        [InlineData(-10, 10)]
+        [InlineData(10, -10)]
+        public void IterateRowsRequiresValidRectangle(int width, int height)
+        {
+            var parallelSettings = new ParallelExecutionSettings();
+
+            var rect = new Rectangle(0, 0, width, height);
+
+            ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(
+                () => ParallelHelper.IterateRows(rect, parallelSettings, (rows) => { }));
+
+            Assert.Contains(width <= 0 ? "Width" : "Height", ex.Message);
+        }
+
+        [Theory]
+        [InlineData(0, 10)]
+        [InlineData(10, 0)]
+        [InlineData(-10, 10)]
+        [InlineData(10, -10)]
+        public void IterateRowsWithTempBufferRequiresValidRectangle(int width, int height)
+        {
+            var parallelSettings = new ParallelExecutionSettings();
+
+            var rect = new Rectangle(0, 0, width, height);
+
+            ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(
+                () => ParallelHelper.IterateRowsWithTempBuffer<Rgba32>(rect, parallelSettings, (rows, memory) => { }));
+
+            Assert.Contains(width <= 0 ? "Width" : "Height", ex.Message);
+        }
     }
 }
\ No newline at end of file

From 7fda30d01d225bdc6d287fe82a1c64f0393b5efd Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Wed, 1 May 2019 16:03:50 +0200
Subject: [PATCH 098/223] Bitmap encoder writes V3 header as default (#889)

* Bitmap encoder will now write a V3 header as default.

Introduces a new encoder option `SupportTransparency`: With this option a V4 header will be written with BITFIELDS compression.

* Add 4 and 16 bit images to the Identify test

* Add some useful links for bitmap documentation

* Add 32 bpp images to the Identify test

* Added further information on what will change for the encoder, if SupportTransparency is used.
---
 src/ImageSharp/Formats/Bmp/BmpEncoder.cs      |  8 ++++
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  | 45 ++++++++++++-------
 .../Formats/Bmp/IBmpEncoderOptions.cs         | 10 ++++-
 src/ImageSharp/Formats/Bmp/README.md          | 19 +++++---
 .../Formats/Bmp/BmpDecoderTests.cs            |  7 ++-
 .../Formats/Bmp/BmpEncoderTests.cs            | 38 ++++++++++++++--
 6 files changed, 100 insertions(+), 27 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
index b1a66accec..4efdedb349 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
@@ -18,6 +18,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         public BmpBitsPerPixel? BitsPerPixel { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether the encoder should support transparency.
+        /// Note: Transparency support only works together with 32 bits per pixel. This option will
+        /// change the default behavior of the encoder of writing a bitmap version 3 info header with no compression.
+        /// Instead a bitmap version 4 info header will be written with the BITFIELDS compression.
+        /// </summary>
+        public bool SupportTransparency { get; set; }
+
         /// <inheritdoc/>
         public void Encode<TPixel>(Image<TPixel> image, Stream stream)
             where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index ad526f6689..c4c51b78e3 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -24,22 +24,22 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private int padding;
 
         /// <summary>
-        /// The mask for the alpha channel of the color for a 32 bit rgba bitmaps.
+        /// The mask for the alpha channel of the color for 32 bit rgba bitmaps.
         /// </summary>
         private const int Rgba32AlphaMask = 0xFF << 24;
 
         /// <summary>
-        /// The mask for the red part of the color for a 32 bit rgba bitmaps.
+        /// The mask for the red part of the color for 32 bit rgba bitmaps.
         /// </summary>
         private const int Rgba32RedMask = 0xFF << 16;
 
         /// <summary>
-        /// The mask for the green part of the color for a 32 bit rgba bitmaps.
+        /// The mask for the green part of the color for 32 bit rgba bitmaps.
         /// </summary>
         private const int Rgba32GreenMask = 0xFF << 8;
 
         /// <summary>
-        /// The mask for the blue part of the color for a 32 bit rgba bitmaps.
+        /// The mask for the blue part of the color for 32 bit rgba bitmaps.
         /// </summary>
         private const int Rgba32BlueMask = 0xFF;
 
@@ -49,15 +49,23 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         private BmpBitsPerPixel? bitsPerPixel;
 
+        /// <summary>
+        /// A bitmap v4 header will only be written, if the user explicitly wants support for transparency.
+        /// In this case the compression type BITFIELDS will be used.
+        /// Otherwise a bitmap v3 header will be written, which is supported by almost all decoders.
+        /// </summary>
+        private readonly bool writeV4Header;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="BmpEncoderCore"/> class.
         /// </summary>
-        /// <param name="options">The encoder options</param>
-        /// <param name="memoryAllocator">The memory manager</param>
+        /// <param name="options">The encoder options.</param>
+        /// <param name="memoryAllocator">The memory manager.</param>
         public BmpEncoderCore(IBmpEncoderOptions options, MemoryAllocator memoryAllocator)
         {
             this.memoryAllocator = memoryAllocator;
             this.bitsPerPixel = options.BitsPerPixel;
+            this.writeV4Header = options.SupportTransparency;
         }
 
         /// <summary>
@@ -112,7 +120,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 }
             }
 
-            int infoHeaderSize = BmpInfoHeader.SizeV4;
+            int infoHeaderSize = this.writeV4Header ? BmpInfoHeader.SizeV4 : BmpInfoHeader.SizeV3;
             var infoHeader = new BmpInfoHeader(
                 headerSize: infoHeaderSize,
                 height: image.Height,
@@ -123,17 +131,15 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 clrUsed: 0,
                 clrImportant: 0,
                 xPelsPerMeter: hResolution,
-                yPelsPerMeter: vResolution)
-            {
-                RedMask = Rgba32RedMask,
-                GreenMask = Rgba32GreenMask,
-                BlueMask = Rgba32BlueMask,
-                Compression = BmpCompression.BitFields
-            };
+                yPelsPerMeter: vResolution);
 
-            if (this.bitsPerPixel == BmpBitsPerPixel.Pixel32)
+            if (this.writeV4Header && this.bitsPerPixel == BmpBitsPerPixel.Pixel32)
             {
                 infoHeader.AlphaMask = Rgba32AlphaMask;
+                infoHeader.RedMask = Rgba32RedMask;
+                infoHeader.GreenMask = Rgba32GreenMask;
+                infoHeader.BlueMask = Rgba32BlueMask;
+                infoHeader.Compression = BmpCompression.BitFields;
             }
 
             var fileHeader = new BmpFileHeader(
@@ -151,7 +157,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
             stream.Write(buffer, 0, BmpFileHeader.Size);
 
-            infoHeader.WriteV4Header(buffer);
+            if (this.writeV4Header)
+            {
+                infoHeader.WriteV4Header(buffer);
+            }
+            else
+            {
+                infoHeader.WriteV3Header(buffer);
+            }
 
             stream.Write(buffer, 0, infoHeaderSize);
 
diff --git a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
index f62504d08f..a3a056bfa2 100644
--- a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
+++ b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
@@ -6,12 +6,20 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Configuration options for use during bmp encoding
     /// </summary>
-    /// <remarks>The encoder can currently only write 24-bit rgb images to streams.</remarks>
+    /// <remarks>The encoder can currently only write 24-bit and 32-bit rgb images to streams.</remarks>
     internal interface IBmpEncoderOptions
     {
         /// <summary>
         /// Gets the number of bits per pixel.
         /// </summary>
         BmpBitsPerPixel? BitsPerPixel { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the encoder should support transparency.
+        /// Note: Transparency support only works together with 32 bits per pixel. This option will
+        /// change the default behavior of the encoder of writing a bitmap version 3 info header with no compression.
+        /// Instead a bitmap version 4 info header will be written with the BITFIELDS compression.
+        /// </summary>
+        bool SupportTransparency { get; }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/README.md b/src/ImageSharp/Formats/Bmp/README.md
index d072838438..f418307335 100644
--- a/src/ImageSharp/Formats/Bmp/README.md
+++ b/src/ImageSharp/Formats/Bmp/README.md
@@ -1,8 +1,17 @@
-Encoder/Decoder adapted from:
+### Encoder/Decoder adapted from:
 
-https://github.com/yufeih/Nine.Imaging/
-https://imagetools.codeplex.com/
+- [Nine.Imaging](https://github.com/yufeih/Nine.Imaging/)
+- [imagetools.codeplex](https://imagetools.codeplex.com/)
 
-TODO:
+### Some useful links for documentation about the bitmap format:
 
-- Add support for all bitmap formats.
+- [Microsoft Windows Bitmap File](http://www.fileformat.info/format/bmp/egff.htm)
+- [OS/2 Bitmap File Format Summary](http://www.fileformat.info/format/os2bmp/egff.htm)
+- [The DIB File Format](https://www-user.tu-chemnitz.de/~heha/viewchm.php/hs/petzold.chm/petzoldi/ch15b.htm)
+- [Dr.Dobbs: The BMP File Format, Part 1](http://www.drdobbs.com/architecture-and-design/the-bmp-file-format-part-1/184409517)
+- [Windows Bitmap File Format Specifications](ftp://ftp.nada.kth.se/pub/hacks/sgi/src/libwmf/doc/Bmpfrmat.html)
+
+### A set of bitmap test images:
+
+- [bmpsuite](http://entropymine.com/jason/bmpsuite/bmpsuite/html/bmpsuite.html)
+- [eclecticgeek](http://eclecticgeek.com/dompdf/core_tests/image_bmp.html)
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 05fadd4584..5f3cc7db47 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -130,7 +130,7 @@ namespace SixLabors.ImageSharp.Tests
 
         [Theory]
         [WithFile(LessThanFullSizedPalette, PixelTypes.Rgba32)]
-        public void BmpDecoder_CanDecodeLessThanFullPalete<TPixel>(TestImageProvider<TPixel> provider)
+        public void BmpDecoder_CanDecodeLessThanFullPalette<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
@@ -213,11 +213,16 @@ namespace SixLabors.ImageSharp.Tests
         }
 
         [Theory]
+        [InlineData(Bit32Rgb, 32)]
+        [InlineData(Bit32Rgba, 32)]
         [InlineData(Car, 24)]
         [InlineData(F, 24)]
         [InlineData(NegHeight, 24)]
+        [InlineData(Bit16, 16)]
+        [InlineData(Bit16Inverted, 16)]
         [InlineData(Bit8, 8)]
         [InlineData(Bit8Inverted, 8)]
+        [InlineData(Bit4, 4)]
         public void Identify(string imagePath, int expectedPixelSize)
         {
             var testFile = TestFile.Create(imagePath);
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index c9745ef4f7..c7558ab422 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -11,6 +11,8 @@ using Xunit.Abstractions;
 
 namespace SixLabors.ImageSharp.Tests
 {
+    using static TestImages.Bmp;
+
     public class BmpEncoderTests : FileTestBase
     {
         public static readonly TheoryData<BmpBitsPerPixel> BitsPerPixel =
@@ -102,15 +104,43 @@ namespace SixLabors.ImageSharp.Tests
         public void Encode_WorksWithDifferentSizes<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel);
 
-        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(Bit32Rgba, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(WinBmpv4, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        // WinBmpv3 is a 24 bits per pixel image
+        [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        public void Encode_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            // if supportTransparency is false, a v3 bitmap header will be written
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
+
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(Bit32Rgba, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(WinBmpv4, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        public void Encode_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+
+        [Theory]
+        [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
+        public void Encode_PreservesAlpha<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+
+        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                // there is no alpha in bmp!
-                image.Mutate(c => c.MakeOpaque());
+                // There is no alpha in bmp with 24 bits per pixels, so the reference image will be made opaque.
+                if (bitsPerPixel == BmpBitsPerPixel.Pixel24)
+                {
+                    image.Mutate(c => c.MakeOpaque());
+                }
 
-                var encoder = new BmpEncoder { BitsPerPixel = bitsPerPixel };
+                var encoder = new BmpEncoder { BitsPerPixel = bitsPerPixel, SupportTransparency = supportTransparency };
 
                 // Does DebugSave & load reference CompareToReferenceInput():
                 image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder);

From 039eae6a99c7d19a3a8ce927aacfa9841567a3e2 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Fri, 3 May 2019 17:10:40 +0200
Subject: [PATCH 099/223] Add support for encoding 16 bit per pixel bitmaps
 (#899)

* Implemented encoding of 16 bits per pixel bitmaps

* Add unit tests for 16 bit encoding and Bgra5551 conversion

* Add additional Bgra5551 pixel conversion tests

* Add Bgra5551 tests for Short2/4 and HalfVector2/4

* Use scaled vector conversion
---
 src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs |   5 +
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  |   3 +-
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  |  30 ++++
 .../Formats/Bmp/IBmpEncoderOptions.cs         |   2 +-
 src/ImageSharp/PixelFormats/IPixel.cs         |   6 +
 .../PixelImplementations/Alpha8.cs            |   4 +
 .../PixelImplementations/Argb32.cs            |   4 +
 .../PixelImplementations/Bgr24.cs             |   4 +
 .../PixelImplementations/Bgr565.cs            |   4 +
 .../PixelImplementations/Bgra32.cs            |   4 +
 .../PixelImplementations/Bgra4444.cs          |   4 +
 .../PixelImplementations/Bgra5551.cs          |   4 +
 .../PixelImplementations/Byte4.cs             |   4 +
 .../PixelImplementations/Gray16.cs            |   4 +
 .../PixelImplementations/Gray8.cs             |   4 +
 .../PixelImplementations/HalfSingle.cs        |   4 +
 .../PixelImplementations/HalfVector2.cs       |   4 +
 .../PixelImplementations/HalfVector4.cs       |   4 +
 .../PixelImplementations/NormalizedByte2.cs   |  11 +-
 .../PixelImplementations/NormalizedByte4.cs   |   4 +
 .../PixelImplementations/NormalizedShort2.cs  |   4 +
 .../PixelImplementations/NormalizedShort4.cs  |   4 +
 .../PixelFormats/PixelImplementations/Rg32.cs |   4 +
 .../PixelImplementations/Rgb24.cs             |   4 +
 .../PixelImplementations/Rgb48.cs             |   4 +
 .../PixelImplementations/Rgba1010102.cs       |   4 +
 .../PixelImplementations/Rgba32.cs            |   4 +
 .../PixelImplementations/Rgba64.cs            |   6 +-
 .../PixelImplementations/RgbaVector.cs        |   9 +-
 .../PixelImplementations/Short2.cs            |   9 +-
 .../PixelImplementations/Short4.cs            |   4 +
 .../PixelOperations{TPixel}.Generated.cs      |  72 ++++++++++
 .../PixelOperations{TPixel}.Generated.tt      |   3 +
 .../Formats/Bmp/BmpDecoderTests.cs            |   2 +-
 .../Formats/Bmp/BmpEncoderTests.cs            |  17 ++-
 .../PixelFormats/Alpha8Tests.cs               |  14 ++
 .../PixelFormats/Argb32Tests.cs               |  14 ++
 .../PixelFormats/Bgr24Tests.cs                |  15 ++
 .../PixelFormats/Bgr565Tests.cs               |  14 ++
 .../PixelFormats/Bgra32Tests.cs               |  14 ++
 .../PixelFormats/Bgra4444Tests.cs             |  14 ++
 .../PixelFormats/Bgra5551Tests.cs             | 129 +++++++++++++++++-
 .../PixelFormats/Byte4Tests.cs                |  14 ++
 .../PixelFormats/Gray16Tests.cs               |  14 ++
 .../PixelFormats/Gray8Tests.cs                |  14 ++
 .../PixelFormats/HalfVector2Tests.cs          |  17 +++
 .../PixelFormats/HalfVector4Tests.cs          |  14 ++
 .../PixelFormats/NormalizedByte2Tests.cs      |  14 ++
 .../PixelFormats/NormalizedByte4Tests.cs      |  14 ++
 .../PixelFormats/NormalizedShort2Tests.cs     |  14 ++
 .../PixelFormats/NormalizedShort4Tests.cs     |  14 ++
 .../PixelFormats/Rg32Tests.cs                 |  14 ++
 .../PixelFormats/Rgb24Tests.cs                |  22 ++-
 .../PixelFormats/Rgb48Tests.cs                |  16 +++
 .../PixelFormats/Rgba1010102Tests.cs          |  14 ++
 .../PixelFormats/Rgba32Tests.cs               |  14 ++
 .../PixelFormats/Rgba64Tests.cs               |  17 +++
 .../PixelFormats/Short2Tests.cs               |  17 +++
 .../PixelFormats/Short4Tests.cs               |  14 ++
 tests/ImageSharp.Tests/TestImages.cs          |   1 +
 .../TestUtilities/PixelTypes.cs               |   2 +
 tests/Images/Input/Bmp/rgb16.bmp              |   3 +
 62 files changed, 715 insertions(+), 25 deletions(-)
 create mode 100644 tests/Images/Input/Bmp/rgb16.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs b/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
index 618999c87d..38f5c1d662 100644
--- a/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
@@ -8,6 +8,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// </summary>
     public enum BmpBitsPerPixel : short
     {
+        /// <summary>
+        /// 16 bits per pixel. Each pixel consists of 2 bytes.
+        /// </summary>
+        Pixel16 = 16,
+
         /// <summary>
         /// 24 bits per pixel. Each pixel consists of 3 bytes.
         /// </summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index b52c3754e2..9d9c7b624a 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -1022,7 +1022,8 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.bmpMetadata.InfoHeaderType = infoHeaderType;
 
             // We can only encode at these bit rates so far.
-            if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
+            if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel16)
+                || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel32))
             {
                 this.bmpMetadata.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index c4c51b78e3..82483e3902 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -194,6 +194,10 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 case BmpBitsPerPixel.Pixel24:
                     this.Write24Bit(stream, pixels);
                     break;
+
+                case BmpBitsPerPixel.Pixel16:
+                    this.Write16Bit(stream, pixels);
+                    break;
             }
         }
 
@@ -246,5 +250,31 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 }
             }
         }
+
+        /// <summary>
+        /// Writes the 16bit color palette to the stream.
+        /// </summary>
+        /// <typeparam name="TPixel">The type of the pixel.</typeparam>
+        /// <param name="stream">The <see cref="Stream"/> to write to.</param>
+        /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> containing pixel data.</param>
+        private void Write16Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (IManagedByteBuffer row = this.AllocateRow(pixels.Width, 2))
+            {
+                for (int y = pixels.Height - 1; y >= 0; y--)
+                {
+                    Span<TPixel> pixelSpan = pixels.GetRowSpan(y);
+
+                    PixelOperations<TPixel>.Instance.ToBgra5551Bytes(
+                        this.configuration,
+                        pixelSpan,
+                        row.GetSpan(),
+                        pixelSpan.Length);
+
+                    stream.Write(row.Array, 0, row.Length());
+                }
+            }
+        }
     }
 }
diff --git a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
index a3a056bfa2..96ec423e7b 100644
--- a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
+++ b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
@@ -6,7 +6,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Configuration options for use during bmp encoding
     /// </summary>
-    /// <remarks>The encoder can currently only write 24-bit and 32-bit rgb images to streams.</remarks>
+    /// <remarks>The encoder can currently only write 16-bit, 24-bit and 32-bit rgb images to streams.</remarks>
     internal interface IBmpEncoderOptions
     {
         /// <summary>
diff --git a/src/ImageSharp/PixelFormats/IPixel.cs b/src/ImageSharp/PixelFormats/IPixel.cs
index 1277406869..21ec2a3fdc 100644
--- a/src/ImageSharp/PixelFormats/IPixel.cs
+++ b/src/ImageSharp/PixelFormats/IPixel.cs
@@ -61,6 +61,12 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="source">The <see cref="Argb32"/> value.</param>
         void FromArgb32(Argb32 source);
 
+        /// <summary>
+        /// Initializes the pixel instance from an <see cref="Bgra5551"/> value.
+        /// </summary>
+        /// <param name="source">The <see cref="Bgra5551"/> value.</param>
+        void FromBgra5551(Bgra5551 source);
+
         /// <summary>
         /// Initializes the pixel instance from an <see cref="Bgr24"/> value.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Alpha8.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Alpha8.cs
index 75b7ede827..cd864b5455 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Alpha8.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Alpha8.cs
@@ -87,6 +87,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.PackedValue = source.A;
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.PackedValue = byte.MaxValue;
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
index 8fc3016314..075df01cd2 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
@@ -187,6 +187,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromArgb32(Argb32 source) => this.PackedValue = source.PackedValue;
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgr24(Bgr24 source)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
index 96ff7da6f6..3ba6436a0b 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
@@ -109,6 +109,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgr24(Bgr24 source) => this = source;
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr565.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr565.cs
index a2e4dc8802..9e42de388c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr565.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr565.cs
@@ -87,6 +87,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromArgb32(Argb32 source) => this.FromVector4(source.ToVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromVector4(source.ToVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgr24(Bgr24 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
index 1d156222ff..758be8043c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
@@ -159,6 +159,10 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.A = byte.MaxValue;
         }
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this = source;
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra4444.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra4444.cs
index 110b51822d..6fcac62917 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra4444.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra4444.cs
@@ -90,6 +90,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromArgb32(Argb32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgr24(Bgr24 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
index dcfb25a64b..abb3eb19e5 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
@@ -87,6 +87,10 @@ namespace SixLabors.ImageSharp.PixelFormats
                         (this.PackedValue >> 15) & 0x01);
         }
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this = source;
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromArgb32(Argb32 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
index 43a03dc5d1..a07cd5213c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
@@ -111,6 +111,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromRgb24(Rgb24 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromRgba32(Rgba32 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
index 2e98a28ada..6fce1c7575 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
@@ -106,6 +106,10 @@ namespace SixLabors.ImageSharp.PixelFormats
                 ImageMaths.UpscaleFrom8BitTo16Bit(source.B));
         }
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.PackedValue = ImageMaths.UpscaleFrom8BitTo16Bit(source.PackedValue);
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
index 512bee39de..1c278b434c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
@@ -97,6 +97,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.PackedValue = ImageMaths.Get8BitBT709Luminance(source.R, source.G, source.B);
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.PackedValue = source.PackedValue;
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/HalfSingle.cs b/src/ImageSharp/PixelFormats/PixelImplementations/HalfSingle.cs
index 8323cf3e8a..580cc5399b 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/HalfSingle.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/HalfSingle.cs
@@ -88,6 +88,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector2.cs b/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector2.cs
index cb915459bc..e2ed931b75 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector2.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector2.cs
@@ -99,6 +99,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector4.cs
index 9f60ca8c77..3b30ebd1e6 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/HalfVector4.cs
@@ -107,6 +107,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte2.cs b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte2.cs
index d39cfd402e..cd95e87ecf 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte2.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte2.cs
@@ -8,7 +8,7 @@ using System.Runtime.CompilerServices;
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <summary>
-    /// Packed packed pixel type containing two 8-bit signed normalized values, ranging from −1 to 1.
+    /// Packed pixel type containing two 8-bit signed normalized values, ranging from −1 to 1.
     /// <para>
     /// Ranges from [-1, -1, 0, 1] to [1, 1, 0, 1] in vector form.
     /// </para>
@@ -107,10 +107,11 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void ToRgba32(ref Rgba32 dest)
-        {
-            dest.FromScaledVector4(this.ToScaledVector4());
-        }
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void ToRgba32(ref Rgba32 dest) => dest.FromScaledVector4(this.ToScaledVector4());
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
index 8a9368463f..73a3d32625 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedByte4.cs
@@ -110,6 +110,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort2.cs b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort2.cs
index b9cab1e7d3..8d7c400b45 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort2.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort2.cs
@@ -105,6 +105,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort4.cs
index 3bc74e6c67..453b1c1b7c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/NormalizedShort4.cs
@@ -112,6 +112,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rg32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rg32.cs
index 6dc623518d..0411f8f3e9 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rg32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rg32.cs
@@ -93,6 +93,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
index 86565731d2..1255f66d15 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
@@ -156,6 +156,10 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.B = rgb;
         }
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromRgb24(Rgb24 source) => this = source;
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb48.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb48.cs
index eda116a46c..f59036ec7d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb48.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb48.cs
@@ -126,6 +126,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromRgba64(Rgba64 source) => this = source.Rgb;
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba1010102.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba1010102.cs
index 895added1b..38f61d56c1 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba1010102.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba1010102.cs
@@ -99,6 +99,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
index 5a16704ef0..7367c44634 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
@@ -266,6 +266,10 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.A = source.A;
         }
 
+        /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
index 5ae5492e23..87d1b235bf 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
@@ -9,7 +9,7 @@ using System.Runtime.InteropServices;
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <summary>
-    /// Packed pixel type containing four 16-bit unsigned normalized values ranging from 0 to 635535.
+    /// Packed pixel type containing four 16-bit unsigned normalized values ranging from 0 to 65535.
     /// <para>
     /// Ranges from [0, 0, 0, 0] to [1, 1, 1, 1] in vector form.
     /// </para>
@@ -154,6 +154,10 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.A = ImageMaths.UpscaleFrom8BitTo16Bit(source.A);
         }
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source)
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
index d65a5ade78..96003cc5bf 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
@@ -134,6 +134,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
@@ -152,10 +156,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void ToRgba32(ref Rgba32 dest)
-        {
-            dest.FromScaledVector4(this.ToScaledVector4());
-        }
+        public void ToRgba32(ref Rgba32 dest) => dest.FromScaledVector4(this.ToScaledVector4());
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Short2.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Short2.cs
index 96fe15ed61..803a77b23f 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Short2.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Short2.cs
@@ -111,6 +111,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
@@ -129,10 +133,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void ToRgba32(ref Rgba32 dest)
-        {
-            dest.FromScaledVector4(this.ToScaledVector4());
-        }
+        public void ToRgba32(ref Rgba32 dest) => dest.FromScaledVector4(this.ToScaledVector4());
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Short4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Short4.cs
index d224f8eb4e..c52b293476 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Short4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Short4.cs
@@ -116,6 +116,10 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromBgra32(Bgra32 source) => this.FromScaledVector4(source.ToScaledVector4());
 
+        /// <inheritdoc/>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public void FromBgra5551(Bgra5551 source) => this.FromScaledVector4(source.ToScaledVector4());
+
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromGray8(Gray8 source) => this.FromScaledVector4(source.ToScaledVector4());
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.cs
index 207a8767d6..7002819928 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.cs
@@ -657,5 +657,77 @@ namespace SixLabors.ImageSharp.PixelFormats
         {
             this.ToRgba64(configuration, sourcePixels.Slice(0, count), MemoryMarshal.Cast<byte, Rgba64>(destBytes));
         }
+
+        /// <summary>
+        /// Converts all pixels in 'source` span of <see cref="Bgra5551"/> into a span of <typeparamref name="TPixel"/>-s.
+        /// </summary>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
+        /// <param name="source">The source <see cref="Span{T}"/> of <see cref="Bgra5551"/> data.</param>
+        /// <param name="destPixels">The <see cref="Span{T}"/> to the destination pixels.</param>
+        internal virtual void FromBgra5551(Configuration configuration, ReadOnlySpan<Bgra5551> source, Span<TPixel> destPixels)
+        {
+            Guard.DestinationShouldNotBeTooShort(source, destPixels, nameof(destPixels));
+            
+            ref Bgra5551 sourceBaseRef = ref MemoryMarshal.GetReference(source);
+            ref TPixel destBaseRef = ref MemoryMarshal.GetReference(destPixels);
+
+            for (int i = 0; i < source.Length; i++)
+            {
+                ref Bgra5551 sp = ref Unsafe.Add(ref sourceBaseRef, i);
+                ref TPixel dp = ref Unsafe.Add(ref destBaseRef, i);
+
+                dp.FromBgra5551(sp);
+            }
+        }
+
+        /// <summary>
+        /// A helper for <see cref="FromBgra5551(Configuration, ReadOnlySpan{Bgra5551}, Span{TPixel})"/> that expects a byte span.
+        /// The layout of the data in 'sourceBytes' must be compatible with <see cref="Bgra5551"/> layout.
+        /// </summary>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
+        /// <param name="sourceBytes">The <see cref="ReadOnlySpan{T}"/> to the source bytes.</param>
+        /// <param name="destPixels">The <see cref="Span{T}"/> to the destination pixels.</param>
+        /// <param name="count">The number of pixels to convert.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal void FromBgra5551Bytes(Configuration configuration, ReadOnlySpan<byte> sourceBytes, Span<TPixel> destPixels, int count)
+        {
+            this.FromBgra5551(configuration, MemoryMarshal.Cast<byte, Bgra5551>(sourceBytes).Slice(0, count), destPixels);
+        }
+
+        /// <summary>
+        /// Converts all pixels of the 'sourcePixels` span to a span of <see cref="Bgra5551"/>-s.
+        /// </summary>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
+        /// <param name="sourcePixels">The span of source pixels</param>
+        /// <param name="destPixels">The destination span of <see cref="Bgra5551"/> data.</param>
+        internal virtual void ToBgra5551(Configuration configuration, ReadOnlySpan<TPixel> sourcePixels, Span<Bgra5551> destPixels)
+        {
+            Guard.DestinationShouldNotBeTooShort(sourcePixels, destPixels, nameof(destPixels));
+
+            ref TPixel sourceBaseRef = ref MemoryMarshal.GetReference(sourcePixels);
+            ref Bgra5551 destBaseRef = ref MemoryMarshal.GetReference(destPixels);
+
+            for (int i = 0; i < sourcePixels.Length; i++)
+            {
+                ref TPixel sp = ref Unsafe.Add(ref sourceBaseRef, i);
+                ref Bgra5551 dp = ref Unsafe.Add(ref destBaseRef, i);
+
+                dp.FromScaledVector4(sp.ToScaledVector4());
+            }
+        }
+
+        /// <summary>
+        /// A helper for <see cref="ToBgra5551(Configuration, ReadOnlySpan{TPixel}, Span{Bgra5551})"/> that expects a byte span as destination.
+        /// The layout of the data in 'destBytes' must be compatible with <see cref="Bgra5551"/> layout.
+        /// </summary>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
+        /// <param name="sourcePixels">The <see cref="Span{T}"/> to the source pixels.</param>
+        /// <param name="destBytes">The <see cref="Span{T}"/> to the destination bytes.</param>
+        /// <param name="count">The number of pixels to convert.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal void ToBgra5551Bytes(Configuration configuration, ReadOnlySpan<TPixel> sourcePixels, Span<byte> destBytes, int count)
+        {
+            this.ToBgra5551(configuration, sourcePixels.Slice(0, count), MemoryMarshal.Cast<byte, Bgra5551>(destBytes));
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.tt b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.tt
index 8579423b34..8603012321 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.tt
@@ -136,5 +136,8 @@ namespace SixLabors.ImageSharp.PixelFormats
     GenerateFromMethods("Rgba64");
     GenerateToDestFormatMethods("Rgba64");
 
+    GenerateFromMethods("Bgra5551");
+    GenerateToDestFormatMethods("Bgra5551");
+
 #>    }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index 5f3cc7db47..e615dbe568 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -11,7 +11,7 @@ using Xunit;
 
 // ReSharper disable InconsistentNaming
 
-namespace SixLabors.ImageSharp.Tests
+namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 {
     using SixLabors.ImageSharp.Metadata;
     using static TestImages.Bmp;
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index c7558ab422..7e054734e3 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -6,10 +6,11 @@ using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+
 using Xunit;
 using Xunit.Abstractions;
 
-namespace SixLabors.ImageSharp.Tests
+namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 {
     using static TestImages.Bmp;
 
@@ -25,16 +26,16 @@ namespace SixLabors.ImageSharp.Tests
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
-            { TestImages.Bmp.Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
+            { Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
+            { V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
+            { RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
         };
 
         public static readonly TheoryData<string, BmpBitsPerPixel> BmpBitsPerPixelFiles =
         new TheoryData<string, BmpBitsPerPixel>
         {
-            { TestImages.Bmp.Car, BmpBitsPerPixel.Pixel24 },
-            { TestImages.Bmp.Bit32Rgb, BmpBitsPerPixel.Pixel32 }
+            { Car, BmpBitsPerPixel.Pixel24 },
+            { Bit32Rgb, BmpBitsPerPixel.Pixel32 }
         };
 
         public BmpEncoderTests(ITestOutputHelper output) => this.Output = output;
@@ -111,6 +112,8 @@ namespace SixLabors.ImageSharp.Tests
         [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         // WinBmpv3 is a 24 bits per pixel image
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
         public void Encode_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             // if supportTransparency is false, a v3 bitmap header will be written
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
@@ -121,6 +124,8 @@ namespace SixLabors.ImageSharp.Tests
         [WithFile(WinBmpv4, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
         public void Encode_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
diff --git a/tests/ImageSharp.Tests/PixelFormats/Alpha8Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Alpha8Tests.cs
index 8f68c9d03f..b6e87626b6 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Alpha8Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Alpha8Tests.cs
@@ -94,5 +94,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             input.ToRgba32(ref actual);
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Alpha8_FromBgra5551()
+        {
+            // arrange
+            var alpha = default(Alpha8);
+            byte expected = byte.MaxValue;
+
+            // act
+            alpha.FromBgra5551(new Bgra5551(0.0f, 0.0f, 0.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, alpha.PackedValue);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
index b9f7414900..4f3394e691 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
@@ -60,6 +60,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Argb32_FromBgra5551()
+        {
+            // arrange
+            var argb = default(Argb32);
+            uint expected = uint.MaxValue;
+
+            // act
+            argb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, argb.PackedValue);
+        }
+
         [Fact]
         public void Argb32_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
index 2295fbe56f..f145e6928e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
@@ -95,5 +95,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 
             Assert.Equal(Vec(1, 2, 3), rgb.ToVector4());
         }
+
+        [Fact]
+        public void Bgr24_FromBgra5551()
+        {
+            // arrange
+            var bgr = default(Bgr24);
+
+            // act
+            bgr.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(255, bgr.R);
+            Assert.Equal(255, bgr.G);
+            Assert.Equal(255, bgr.B);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
index 967e358e1e..4419fe898a 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
@@ -63,6 +63,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Bgr565_FromBgra5551()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            bgr.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, bgr.PackedValue);
+        }
+
         [Fact]
         public void Bgr565_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
index a5c53ed8b0..171a3dfa00 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
@@ -102,5 +102,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 
             Assert.Equal(Vec(1, 2, 3, 4), rgb.ToVector4());
         }
+
+        [Fact]
+        public void Bgra32_FromBgra5551()
+        {
+            // arrange
+            var bgra = default(Bgra32);
+            uint expected = uint.MaxValue;
+
+            // act
+            bgra.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, bgra.PackedValue);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
index 8b56ec19fe..b6019016c8 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
@@ -64,6 +64,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Bgra4444_FromBgra5551()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            bgra.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, bgra.PackedValue);
+        }
+
         [Fact]
         public void Bgra4444_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
index 76edee8a73..f5abca59a1 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -18,6 +19,13 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             float w = 0x1;
             Assert.Equal(0xeacd, new Bgra5551(x / 0x1f, y / 0x1f, z / 0x1f, w).PackedValue);
             Assert.Equal(3088, new Bgra5551(0.1f, -0.3f, 0.5f, -0.7f).PackedValue);
+
+            Assert.Equal(0xFFFF, new Bgra5551(Vector4.One).PackedValue);
+            Assert.Equal(0x7C00, new Bgra5551(Vector4.UnitX).PackedValue);
+            Assert.Equal(0x03E0, new Bgra5551(Vector4.UnitY).PackedValue);
+            Assert.Equal(0x001F, new Bgra5551(Vector4.UnitZ).PackedValue);
+            Assert.Equal(0x8000, new Bgra5551(Vector4.UnitW).PackedValue);
+
             // Test the limits.
             Assert.Equal(0x0, new Bgra5551(Vector4.Zero).PackedValue);
             Assert.Equal(0xFFFF, new Bgra5551(Vector4.One).PackedValue);
@@ -53,7 +61,6 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Vector4 scaled = new Bgra5551(Vector4.One).ToScaledVector4();
             int expected = 0xFFFF;
             var pixel = default(Bgra5551);
-            pixel.FromScaledVector4(scaled);
 
             // act
             pixel.FromScaledVector4(scaled);
@@ -63,6 +70,126 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Bgra5551_FromRgba32()
+        {
+            // arrange
+            var bgra1 = default(Bgra5551);
+            var bgra2 = default(Bgra5551);
+            ushort expectedPackedValue1 = ushort.MaxValue;
+            ushort expectedPackedValue2 = 0xFC1F;
+
+            // act
+            bgra1.FromRgba32(new Rgba32(255, 255, 255, 255));
+            bgra2.FromRgba32(new Rgba32(255, 0, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue1, bgra1.PackedValue);
+            Assert.Equal(expectedPackedValue2, bgra2.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromBgra32()
+        {
+            // arrange
+            var bgra1 = default(Bgra5551);
+            var bgra2 = default(Bgra5551);
+            ushort expectedPackedValue1 = ushort.MaxValue;
+            ushort expectedPackedValue2 = 0xFC1F;
+
+            // act
+            bgra1.FromBgra32(new Bgra32(255, 255, 255, 255));
+            bgra2.FromBgra32(new Bgra32(255, 0, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue1, bgra1.PackedValue);
+            Assert.Equal(expectedPackedValue2, bgra2.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromArgb32()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+            
+            // act
+            bgra.FromArgb32(new Argb32(255, 255, 255, 255));
+            
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromRgba64()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromGrey16()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromGrey8()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromBgr24()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra5551_FromRgb24()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
         [Fact]
         public void Bgra5551_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
index 8391ef25ae..9174a6abdb 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
@@ -61,6 +61,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Byte4_FromBgra5551()
+        {
+            // arrange
+            var rgb = default(Byte4);
+            uint expected = 0xFFFFFFFF;
+
+            // act
+            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgb.PackedValue);
+        }
+
         [Fact]
         public void Byte4_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
index cb19c031d0..01b60832e2 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
@@ -126,5 +126,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual.B);
             Assert.Equal(byte.MaxValue, actual.A);
         }
+
+        [Fact]
+        public void Gray16_FromBgra5551()
+        {
+            // arrange
+            var gray = default(Gray16);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            gray.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, gray.PackedValue);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
index 1e17985e60..159f97cdee 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
@@ -148,6 +148,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(byte.MaxValue, actual.A);
         }
 
+        [Fact]
+        public void Gray8_FromBgra5551()
+        {
+            // arrange
+            var grey = default(Gray8);
+            byte expected = byte.MaxValue;
+
+            // act
+            grey.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, grey.PackedValue);
+        }
+
         public class Rgba32Compatibility
         {
             // ReSharper disable once MemberHidesStaticFromOuterClass
diff --git a/tests/ImageSharp.Tests/PixelFormats/HalfVector2Tests.cs b/tests/ImageSharp.Tests/PixelFormats/HalfVector2Tests.cs
index ccdd23e8fb..57da5438ca 100644
--- a/tests/ImageSharp.Tests/PixelFormats/HalfVector2Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/HalfVector2Tests.cs
@@ -71,5 +71,22 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void HalfVector2_FromBgra5551()
+        {
+            // arrange
+            var halfVector2 = default(HalfVector2);
+            
+            // act
+            halfVector2.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Vector4 actual = halfVector2.ToScaledVector4();
+            Assert.Equal(1F, actual.X);
+            Assert.Equal(1F, actual.Y);
+            Assert.Equal(0, actual.Z);
+            Assert.Equal(1, actual.W);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/HalfVector4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/HalfVector4Tests.cs
index c61dd97d2a..ed1a0b7209 100644
--- a/tests/ImageSharp.Tests/PixelFormats/HalfVector4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/HalfVector4Tests.cs
@@ -65,5 +65,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void HalfVector4_FromBgra5551()
+        {
+            // arrange
+            var halfVector4 = default(HalfVector4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            halfVector4.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, halfVector4.ToScaledVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte2Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte2Tests.cs
index 506ebe0fe0..1533f9cf9a 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte2Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte2Tests.cs
@@ -66,5 +66,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void NormalizedByte2_FromBgra5551()
+        {
+            // arrange
+            var normalizedByte2 = default(NormalizedByte2);
+            var expected = new Vector4(1, 1, 0, 1);
+
+            // act
+            normalizedByte2.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, normalizedByte2.ToVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
index 19a49e5d8a..1cb404a008 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
@@ -60,5 +60,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void NormalizedByte4_FromBgra5551()
+        {
+            // arrange
+            var normalizedByte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            normalizedByte4.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, normalizedByte4.ToVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort2Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort2Tests.cs
index 216ed4ad75..ff9350b701 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort2Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort2Tests.cs
@@ -69,5 +69,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void NormalizedShort2_FromBgra5551()
+        {
+            // arrange
+            var normalizedShort2 = default(NormalizedShort2);
+            var expected = new Vector4(1, 1, 0, 1);
+
+            // act
+            normalizedShort2.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, normalizedShort2.ToVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
index d06d46d06f..cea7e3146e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
@@ -61,5 +61,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void NormalizedShort4_FromBgra5551()
+        {
+            // arrange
+            var normalizedShort4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            normalizedShort4.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, normalizedShort4.ToVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rg32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rg32Tests.cs
index 46e5fbc3cd..bccaaf8168 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rg32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rg32Tests.cs
@@ -62,6 +62,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Rg32_FromBgra5551()
+        {
+            // arrange
+            var rg32 = new Rg32(Vector2.One);
+            uint expected = 0xFFFFFFFF;
+
+            // act
+            rg32.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rg32.PackedValue);
+        }
+
         [Fact]
         public void Rg32_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgb24Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgb24Tests.cs
index 92e8d302d4..df459422c9 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgb24Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgb24Tests.cs
@@ -103,11 +103,31 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
         [Fact]
         public void ToRgba32()
         {
+            // arrange
             var rgb = new Rgb24(1, 2, 3);
             Rgba32 rgba = default;
+            var expected = new Rgba32(1, 2, 3, 255);
+
+            // act
             rgb.ToRgba32(ref rgba);
 
-            Assert.Equal(new Rgba32(1, 2, 3, 255), rgba);
+            // assert
+            Assert.Equal(expected, rgba);
+        }
+
+        [Fact]
+        public void Rgb24_FromBgra5551()
+        {
+            // arrange
+            var rgb = new Rgb24(255, 255, 255);
+
+            // act
+            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(255, rgb.R);
+            Assert.Equal(255, rgb.G);
+            Assert.Equal(255, rgb.B);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgb48Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgb48Tests.cs
index d30e498609..3bddc21ab3 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgb48Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgb48Tests.cs
@@ -58,5 +58,21 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Rgb48_FromBgra5551()
+        {
+            // arrange
+            var rgb = default(Rgb48);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgb.R);
+            Assert.Equal(expected, rgb.G);
+            Assert.Equal(expected, rgb.B);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
index a897dd4cdb..0dbed2d2cb 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
@@ -64,6 +64,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual.PackedValue);
         }
 
+        [Fact]
+        public void Rgba1010102_FromBgra5551()
+        {
+            // arrange
+            var rgba = new Rgba1010102(Vector4.One);
+            uint expected = 0xFFFFFFFF;
+
+            // act
+            rgba.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgba.PackedValue);
+        }
+
         [Fact]
         public void Rgba1010102_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba32Tests.cs
index ad1d137406..275afa35d6 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba32Tests.cs
@@ -276,5 +276,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Rgba32_FromBgra5551()
+        {
+            // arrange
+            var rgb = default(Rgba32);
+            uint expected = 0xFFFFFFFF;
+
+            // act
+            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgb.PackedValue);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
index 3e5d7a56ed..51f80e0e18 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
@@ -91,5 +91,22 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Rgba64_FromBgra5551()
+        {
+            // arrange
+            var rgba = default(Rgba64);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            rgba.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgba.R);
+            Assert.Equal(expected, rgba.G);
+            Assert.Equal(expected, rgba.B);
+            Assert.Equal(expected, rgba.A);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/Short2Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Short2Tests.cs
index c9a3b33c9a..4ae172ed4e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Short2Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Short2Tests.cs
@@ -141,5 +141,22 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Short2_FromBgra5551()
+        {
+            // arrange
+            var short2 = default(Short2);
+            
+            // act
+            short2.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Vector4 actual = short2.ToScaledVector4();
+            Assert.Equal(1, actual.X);
+            Assert.Equal(1, actual.Y);
+            Assert.Equal(0, actual.Z);
+            Assert.Equal(1, actual.W);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/Short4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Short4Tests.cs
index 247342a053..1cb7d89980 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Short4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Short4Tests.cs
@@ -181,5 +181,19 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void Short4_FromBgra5551()
+        {
+            // arrange
+            var short4 = default(Short4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            short4.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, short4.ToScaledVector4());
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 23bebd6213..f82278ef5d 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -241,6 +241,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit16Inverted = "Bmp/test16-inverted.bmp";
             public const string Bit32Rgb = "Bmp/rgb32.bmp";
             public const string Bit32Rgba = "Bmp/rgba32.bmp";
+            public const string Rgb16 = "Bmp/rgb16.bmp";
 
             // Note: This format can be called OS/2 BMPv1, or Windows BMPv2
             public const string WinBmpv2 = "Bmp/pal8os2v1_winv2.bmp";
diff --git a/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs b/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
index a051e577db..e4a7572d60 100644
--- a/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
@@ -58,6 +58,8 @@ namespace SixLabors.ImageSharp.Tests
 
         Rgb48 = 1 << 21,
 
+        Bgra5551 = 1 << 22,
+
         // TODO: Add multi-flag entries by rules defined in PackedPixelConverterHelper
 
         // "All" is handled as a separate, individual case instead of using bitwise OR
diff --git a/tests/Images/Input/Bmp/rgb16.bmp b/tests/Images/Input/Bmp/rgb16.bmp
new file mode 100644
index 0000000000..fde234fbb5
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb16.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fcecd482048c853d08255430c5bac462821522683f4429626442580058aa5e5e
+size 16438

From 2fa57ff510284c657a8ff87e369a30e5cfdaf734 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Wed, 1 May 2019 17:41:36 +0200
Subject: [PATCH 100/223] define IImageVisitor

---
 src/ImageSharp/IImage.cs                      |  2 +-
 src/ImageSharp/Image.cs                       | 40 +++++++++++++++++++
 src/ImageSharp/Image{TPixel}.cs               |  5 +++
 .../IImageProcessingContext{TPixel}.cs        |  5 +++
 .../Processing/ProcessingExtensions.cs        |  5 +++
 .../Processing/Processors/IImageProcessor.cs  |  6 +++
 6 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 src/ImageSharp/Image.cs

diff --git a/src/ImageSharp/IImage.cs b/src/ImageSharp/IImage.cs
index b9e2cee616..fb251cfd5a 100644
--- a/src/ImageSharp/IImage.cs
+++ b/src/ImageSharp/IImage.cs
@@ -4,7 +4,7 @@
 using System;
 
 namespace SixLabors.ImageSharp
-{
+{   
     /// <summary>
     /// Encapsulates the properties and methods that describe an image.
     /// </summary>
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
new file mode 100644
index 0000000000..6bea675b9f
--- /dev/null
+++ b/src/ImageSharp/Image.cs
@@ -0,0 +1,40 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    internal interface IImageVisitor
+    {
+        void Visit<TPixel>(Image<TPixel> image)
+            where TPixel : struct, IPixel<TPixel>;
+    }
+    
+    public abstract partial class Image : IImage
+    {
+        /// <inheritdoc/>
+        public PixelTypeInfo PixelType { get; }
+
+        /// <inheritdoc />
+        public abstract int Width { get; }
+
+        /// <inheritdoc />
+        public abstract int Height { get; }
+        
+        /// <inheritdoc/>
+        public ImageMetadata Metadata { get; }
+
+        protected Image(PixelTypeInfo pixelType, ImageMetadata metadata)
+        {
+            this.PixelType = pixelType;
+            this.Metadata = metadata ?? new ImageMetadata();
+        }
+
+        public abstract void Dispose();
+
+        internal abstract void ApplyVisitor(IImageVisitor visitor);
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index f2bef78e1a..2cf389d37e 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -220,6 +220,11 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public void Dispose() => this.Frames.Dispose();
 
+        internal override void ApplyVisitor(IImageVisitor visitor)
+        {
+            visitor.Visit(this);
+        }
+
         /// <inheritdoc/>
         public override string ToString() => $"Image<{typeof(TPixel).Name}>: {this.Width}x{this.Height}";
 
diff --git a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
index 4897cc58b4..72b78b32ac 100644
--- a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
+++ b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
@@ -8,6 +8,11 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
+    public interface IImageProcessingContext
+    {
+        
+    }
+    
     /// <summary>
     /// An interface to queue up image operations to apply to an image.
     /// </summary>
diff --git a/src/ImageSharp/Processing/ProcessingExtensions.cs b/src/ImageSharp/Processing/ProcessingExtensions.cs
index 9d06c61d4c..c96b971117 100644
--- a/src/ImageSharp/Processing/ProcessingExtensions.cs
+++ b/src/ImageSharp/Processing/ProcessingExtensions.cs
@@ -13,6 +13,11 @@ namespace SixLabors.ImageSharp.Processing
     /// </summary>
     public static class ProcessingExtensions
     {
+        public static void Mutate(this Image source, Action<IImageProcessingContext> operation)
+        {
+            
+        }
+        
         /// <summary>
         /// Applies the given operation to the mutable image.
         /// Useful when we need to extract information like Width/Height to parametrize the next operation working on the <see cref="IImageProcessingContext{TPixel}"/> chain.
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor.cs b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
index d7fe0465be..78800affbc 100644
--- a/src/ImageSharp/Processing/Processors/IImageProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
@@ -6,6 +6,12 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors
 {
+    public interface IImageProcessor
+    {
+        IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>;
+    }
+    
     /// <summary>
     /// Encapsulates methods to alter the pixels of an image.
     /// </summary>

From 0d2c0e78c8b4bf873484aba3caa283c955df4cc0 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Wed, 1 May 2019 21:26:35 +0200
Subject: [PATCH 101/223] pixel agnostic Mutate/Clone defined

---
 src/ImageSharp/Image.cs                       | 15 ++++++--
 src/ImageSharp/Image{TPixel}.cs               | 19 ++++-------
 .../IImageProcessingContext{TPixel}.cs        | 20 +++++------
 .../Processing/ProcessingExtensions.cs        | 34 ++++++++++++++++++-
 4 files changed, 60 insertions(+), 28 deletions(-)

diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index 6bea675b9f..00a9a20755 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
@@ -13,8 +14,10 @@ namespace SixLabors.ImageSharp
             where TPixel : struct, IPixel<TPixel>;
     }
     
-    public abstract partial class Image : IImage
+    public abstract partial class Image : IImage, IConfigurable
     {
+        protected readonly Configuration configuration;
+
         /// <inheritdoc/>
         public PixelTypeInfo PixelType { get; }
 
@@ -27,14 +30,20 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
 
-        protected Image(PixelTypeInfo pixelType, ImageMetadata metadata)
+        /// <summary>
+        /// Gets the pixel buffer.
+        /// </summary>
+        Configuration IConfigurable.Configuration => this.configuration;
+
+        protected Image(Configuration configuration, PixelTypeInfo pixelType, ImageMetadata metadata)
         {
+            this.configuration = configuration ?? Configuration.Default;
             this.PixelType = pixelType;
             this.Metadata = metadata ?? new ImageMetadata();
         }
 
         public abstract void Dispose();
 
-        internal abstract void ApplyVisitor(IImageVisitor visitor);
+        internal abstract void AcceptVisitor(IImageVisitor visitor);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 2cf389d37e..64ec87c4dd 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -18,11 +18,9 @@ namespace SixLabors.ImageSharp
     /// Encapsulates an image, which consists of the pixel data for a graphics image and its attributes.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public sealed class Image<TPixel> : IImage, IConfigurable
+    public sealed class Image<TPixel> : Image
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly Configuration configuration;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="Image{TPixel}"/> class
         /// with the height and the width of the image.
@@ -68,8 +66,8 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, int width, int height, ImageMetadata metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
             this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, default(TPixel));
@@ -85,8 +83,8 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetadata metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.configuration = configuration;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
             this.Metadata = metadata;
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, memorySource);
@@ -102,8 +100,8 @@ namespace SixLabors.ImageSharp
         /// <param name="backgroundColor">The color to initialize the pixels with.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetadata metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
             this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, backgroundColor);
@@ -117,18 +115,14 @@ namespace SixLabors.ImageSharp
         /// <param name="metadata">The images metadata.</param>
         /// <param name="frames">The frames that will be owned by this image instance.</param>
         internal Image(Configuration configuration, ImageMetadata metadata, IEnumerable<ImageFrame<TPixel>> frames)
+            : base(configuration,PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.configuration = configuration ?? Configuration.Default;
             this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
             this.Metadata = metadata ?? new ImageMetadata();
 
             this.Frames = new ImageFrameCollection<TPixel>(this, frames);
         }
 
-        /// <summary>
-        /// Gets the pixel buffer.
-        /// </summary>
-        Configuration IConfigurable.Configuration => this.configuration;
 
         /// <inheritdoc/>
         public PixelTypeInfo PixelType { get; }
@@ -142,7 +136,6 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
 
-        /// <summary>
         /// Gets the frames.
         /// </summary>
         public ImageFrameCollection<TPixel> Frames { get; }
@@ -220,7 +213,7 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public void Dispose() => this.Frames.Dispose();
 
-        internal override void ApplyVisitor(IImageVisitor visitor)
+        internal override void AcceptVisitor(IImageVisitor visitor)
         {
             visitor.Visit(this);
         }
diff --git a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
index 72b78b32ac..1b4fbd3be5 100644
--- a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
+++ b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
@@ -9,16 +9,6 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     public interface IImageProcessingContext
-    {
-        
-    }
-    
-    /// <summary>
-    /// An interface to queue up image operations to apply to an image.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format</typeparam>
-    public interface IImageProcessingContext<TPixel>
-        where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
         /// Gets a reference to the <see cref="MemoryAllocator" /> used to allocate buffers
@@ -31,7 +21,15 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <returns>The <see cref="Rectangle"/></returns>
         Size GetCurrentSize();
-
+    }
+    
+    /// <summary>
+    /// An interface to queue up image operations to apply to an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format</typeparam>
+    public interface IImageProcessingContext<TPixel> : IImageProcessingContext
+        where TPixel : struct, IPixel<TPixel>
+    {
         /// <summary>
         /// Adds the processor to the current set of image operations to be applied.
         /// </summary>
diff --git a/src/ImageSharp/Processing/ProcessingExtensions.cs b/src/ImageSharp/Processing/ProcessingExtensions.cs
index c96b971117..a1acf3aa0b 100644
--- a/src/ImageSharp/Processing/ProcessingExtensions.cs
+++ b/src/ImageSharp/Processing/ProcessingExtensions.cs
@@ -13,9 +13,41 @@ namespace SixLabors.ImageSharp.Processing
     /// </summary>
     public static class ProcessingExtensions
     {
-        public static void Mutate(this Image source, Action<IImageProcessingContext> operation)
+        class ProcessingVisitor : IImageVisitor
         {
+            private readonly Action<IImageProcessingContext> operation;
+
+            private readonly bool mutate;
             
+            public Image ResultImage { get; private set; }
+
+            public ProcessingVisitor(Action<IImageProcessingContext> operation, bool mutate)
+            {
+                this.operation = operation;
+                this.mutate = mutate;
+            }
+
+            public void Visit<TPixel>(Image<TPixel> image)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                IInternalImageProcessingContext<TPixel> operationsRunner = image.GetConfiguration()
+                    .ImageOperationsProvider.CreateImageProcessingContext(image, this.mutate);
+                this.operation(operationsRunner);
+                this.ResultImage = operationsRunner.Apply();
+            }
+        }
+        
+        public static void Mutate(this Image source, Action<IImageProcessingContext> operation)
+        {
+            ProcessingVisitor visitor = new ProcessingVisitor(operation, true);
+            source.AcceptVisitor(visitor);
+        }
+
+        public static Image Clone(this Image source, Action<IImageProcessingContext> operation)
+        {
+            ProcessingVisitor visitor = new ProcessingVisitor(operation, false);
+            source.AcceptVisitor(visitor);
+            return visitor.ResultImage;
         }
         
         /// <summary>

From 7fae100254b9e81823112fa201b3059b8b7be41a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Wed, 1 May 2019 21:56:21 +0200
Subject: [PATCH 102/223] pixel-agnostic ResizeProcessor

---
 .../DefaultInternalImageProcessorContext.cs   |  12 +
 .../IImageProcessingContext{TPixel}.cs        |   6 +-
 src/ImageSharp/Processing/PadExtensions.cs    |   3 +-
 .../Transforms/Resize/ResizeProcessor.cs      | 260 ++++--------------
 .../Resize/ResizeProcessorImplementation.cs   | 188 +++++++++++++
 src/ImageSharp/Processing/ResizeExtensions.cs |  40 +--
 .../FakeImageOperationsProvider.cs            |  10 +
 .../Image/ImageProcessingContextTests.cs      |  74 ++---
 8 files changed, 326 insertions(+), 267 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs

diff --git a/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs b/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs
index 43ba259725..091da003a2 100644
--- a/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs
+++ b/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs
@@ -53,6 +53,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <inheritdoc/>
         public Size GetCurrentSize() => this.GetCurrentBounds().Size;
 
+        public IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle)
+        {
+            var processorImplementation = processor.CreatePixelSpecificProcessor<TPixel>();
+            return this.ApplyProcessor(processorImplementation, rectangle);
+        }
+
+        public IImageProcessingContext ApplyProcessor(IImageProcessor processor)
+        {
+            var processorImplementation = processor.CreatePixelSpecificProcessor<TPixel>();
+            return this.ApplyProcessor(processorImplementation);
+        }
+
         /// <inheritdoc/>
         public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
         {
diff --git a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
index 1b4fbd3be5..fefa973f7c 100644
--- a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
+++ b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
@@ -21,8 +21,12 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <returns>The <see cref="Rectangle"/></returns>
         Size GetCurrentSize();
+
+        IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle);
+
+        IImageProcessingContext ApplyProcessor(IImageProcessor processor);
     }
-    
+
     /// <summary>
     /// An interface to queue up image operations to apply to an image.
     /// </summary>
diff --git a/src/ImageSharp/Processing/PadExtensions.cs b/src/ImageSharp/Processing/PadExtensions.cs
index f730339686..2db219795f 100644
--- a/src/ImageSharp/Processing/PadExtensions.cs
+++ b/src/ImageSharp/Processing/PadExtensions.cs
@@ -19,8 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="width">The new width.</param>
         /// <param name="height">The new height.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Pad<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Pad(this IImageProcessingContext source, int width, int height)
         {
             var options = new ResizeOptions
             {
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index e75f6014ab..4348ecdaba 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -1,98 +1,40 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Buffers;
-using System.Collections.Generic;
-using System.Linq;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    /// <summary>
-    /// Provides methods that allow the resizing of images using various algorithms.
-    /// Adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ResizeProcessor<TPixel> : TransformProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class ResizeProcessor : IImageProcessor
     {
-        // The following fields are not immutable but are optionally created on demand.
-        private ResizeKernelMap horizontalKernelMap;
-        private ResizeKernelMap verticalKernelMap;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="ResizeProcessor{TPixel}"/> class.
+        /// Gets the sampler to perform the resize operation.
         /// </summary>
-        /// <param name="options">The resize options</param>
-        /// <param name="sourceSize">The source image size</param>
-        public ResizeProcessor(ResizeOptions options, Size sourceSize)
-        {
-            Guard.NotNull(options, nameof(options));
-            Guard.NotNull(options.Sampler, nameof(options.Sampler));
-
-            int targetWidth = options.Size.Width;
-            int targetHeight = options.Size.Height;
-
-            // Ensure size is populated across both dimensions.
-            // These dimensions are used to calculate the final dimensions determined by the mode algorithm.
-            // If only one of the incoming dimensions is 0, it will be modified here to maintain aspect ratio.
-            // If it is not possible to keep aspect ratio, make sure at least the minimum is is kept.
-            const int min = 1;
-            if (targetWidth == 0 && targetHeight > 0)
-            {
-                targetWidth = (int)MathF.Max(min, MathF.Round(sourceSize.Width * targetHeight / (float)sourceSize.Height));
-            }
-
-            if (targetHeight == 0 && targetWidth > 0)
-            {
-                targetHeight = (int)MathF.Max(min, MathF.Round(sourceSize.Height * targetWidth / (float)sourceSize.Width));
-            }
-
-            Guard.MustBeGreaterThan(targetWidth, 0, nameof(targetWidth));
-            Guard.MustBeGreaterThan(targetHeight, 0, nameof(targetHeight));
+        public IResampler Sampler { get; }
 
-            (Size size, Rectangle rectangle) = ResizeHelper.CalculateTargetLocationAndBounds(sourceSize, options, targetWidth, targetHeight);
+        /// <summary>
+        /// Gets the target width.
+        /// </summary>
+        public int Width { get; }
 
-            this.Sampler = options.Sampler;
-            this.Width = size.Width;
-            this.Height = size.Height;
-            this.TargetRectangle = rectangle;
-            this.Compand = options.Compand;
-        }
+        /// <summary>
+        /// Gets the target height.
+        /// </summary>
+        public int Height { get; }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ResizeProcessor{TPixel}"/> class.
+        /// Gets the resize rectangle.
         /// </summary>
-        /// <param name="sampler">The sampler to perform the resize operation.</param>
-        /// <param name="width">The target width.</param>
-        /// <param name="height">The target height.</param>
-        /// <param name="sourceSize">The source image size</param>
-        public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize)
-            : this(sampler, width, height, sourceSize, new Rectangle(0, 0, width, height), false)
-        {
-        }
+        public Rectangle TargetRectangle { get; }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ResizeProcessor{TPixel}"/> class.
+        /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
         /// </summary>
-        /// <param name="sampler">The sampler to perform the resize operation.</param>
-        /// <param name="width">The target width.</param>
-        /// <param name="height">The target height.</param>
-        /// <param name="sourceSize">The source image size</param>
-        /// <param name="targetRectangle">
-        /// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
-        /// </param>
-        /// <param name="compand">Whether to compress or expand individual pixel color values on processing.</param>
+        public bool Compand { get; }
+        
         public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize, Rectangle targetRectangle, bool compand)
         {
             Guard.NotNull(sampler, nameof(sampler));
@@ -122,149 +64,63 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.TargetRectangle = targetRectangle;
             this.Compand = compand;
         }
-
-        /// <summary>
-        /// Gets the sampler to perform the resize operation.
-        /// </summary>
-        public IResampler Sampler { get; }
-
-        /// <summary>
-        /// Gets the target width.
-        /// </summary>
-        public int Width { get; }
-
+        
         /// <summary>
-        /// Gets the target height.
+        /// Initializes a new instance of the <see cref="ResizeProcessorImplementation{TPixel}"/> class.
         /// </summary>
-        public int Height { get; }
-
-        /// <summary>
-        /// Gets the resize rectangle.
-        /// </summary>
-        public Rectangle TargetRectangle { get; }
-
-        /// <summary>
-        /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
-        /// </summary>
-        public bool Compand { get; }
-
-        /// <inheritdoc/>
-        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
-        {
-            // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.Width, this.Height, x.Metadata.DeepClone()));
-
-            // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
-        }
-
-        /// <inheritdoc/>
-        protected override void BeforeImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        /// <param name="options">The resize options</param>
+        /// <param name="sourceSize">The source image size</param>
+        public ResizeProcessor(ResizeOptions options, Size sourceSize)
         {
-            if (!(this.Sampler is NearestNeighborResampler))
-            {
-                // Since all image frame dimensions have to be the same we can calculate this for all frames.
-                MemoryAllocator memoryAllocator = source.GetMemoryAllocator();
-                this.horizontalKernelMap = ResizeKernelMap.Calculate(
-                    this.Sampler,
-                    this.TargetRectangle.Width,
-                    sourceRectangle.Width,
-                    memoryAllocator);
+            Guard.NotNull(options, nameof(options));
+            Guard.NotNull(options.Sampler, nameof(options.Sampler));
 
-                this.verticalKernelMap = ResizeKernelMap.Calculate(
-                    this.Sampler,
-                    this.TargetRectangle.Height,
-                    sourceRectangle.Height,
-                    memoryAllocator);
-            }
-        }
+            int targetWidth = options.Size.Width;
+            int targetHeight = options.Size.Height;
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // Handle resize dimensions identical to the original
-            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.TargetRectangle)
+            // Ensure size is populated across both dimensions.
+            // These dimensions are used to calculate the final dimensions determined by the mode algorithm.
+            // If only one of the incoming dimensions is 0, it will be modified here to maintain aspect ratio.
+            // If it is not possible to keep aspect ratio, make sure at least the minimum is is kept.
+            const int min = 1;
+            if (targetWidth == 0 && targetHeight > 0)
             {
-                // The cloned will be blank here copy all the pixel data over
-                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
-                return;
+                targetWidth = (int)MathF.Max(min, MathF.Round(sourceSize.Width * targetHeight / (float)sourceSize.Height));
             }
 
-            int width = this.Width;
-            int height = this.Height;
-            int sourceX = sourceRectangle.X;
-            int sourceY = sourceRectangle.Y;
-            int startY = this.TargetRectangle.Y;
-            int startX = this.TargetRectangle.X;
-
-            var targetWorkingRect = Rectangle.Intersect(
-                this.TargetRectangle,
-                new Rectangle(0, 0, width, height));
-
-            if (this.Sampler is NearestNeighborResampler)
+            if (targetHeight == 0 && targetWidth > 0)
             {
-                // Scaling factors
-                float widthFactor = sourceRectangle.Width / (float)this.TargetRectangle.Width;
-                float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
-
-                ParallelHelper.IterateRows(
-                    targetWorkingRect,
-                    configuration,
-                    rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            // Y coordinates of source points
-                            Span<TPixel> sourceRow =
-                                source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
-                            Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
-
-                            for (int x = targetWorkingRect.Left; x < targetWorkingRect.Right; x++)
-                            {
-                                // X coordinates of source points
-                                targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
-                            }
-                        }
-                    });
-
-                return;
+                targetHeight = (int)MathF.Max(min, MathF.Round(sourceSize.Height * targetWidth / (float)sourceSize.Width));
             }
 
-            int sourceHeight = source.Height;
-
-            PixelConversionModifiers conversionModifiers =
-                PixelConversionModifiers.Premultiply.ApplyCompanding(this.Compand);
-
-            BufferArea<TPixel> sourceArea = source.PixelBuffer.GetArea(sourceRectangle);
+            Guard.MustBeGreaterThan(targetWidth, 0, nameof(targetWidth));
+            Guard.MustBeGreaterThan(targetHeight, 0, nameof(targetHeight));
 
-            // To reintroduce parallel processing, we to launch multiple workers
-            // for different row intervals of the image.
-            using (var worker = new ResizeWorker<TPixel>(
-                configuration,
-                sourceArea,
-                conversionModifiers,
-                this.horizontalKernelMap,
-                this.verticalKernelMap,
-                width,
-                targetWorkingRect,
-                this.TargetRectangle.Location))
-            {
-                worker.Initialize();
+            (Size size, Rectangle rectangle) = ResizeHelper.CalculateTargetLocationAndBounds(sourceSize, options, targetWidth, targetHeight);
 
-                var workingInterval = new RowInterval(targetWorkingRect.Top, targetWorkingRect.Bottom);
-                worker.FillDestinationPixels(workingInterval, destination.PixelBuffer);
-            }
+            this.Sampler = options.Sampler;
+            this.Width = size.Width;
+            this.Height = size.Height;
+            this.TargetRectangle = rectangle;
+            this.Compand = options.Compand;
         }
 
-        protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ResizeProcessorImplementation{TPixel}"/> class.
+        /// </summary>
+        /// <param name="sampler">The sampler to perform the resize operation.</param>
+        /// <param name="width">The target width.</param>
+        /// <param name="height">The target height.</param>
+        /// <param name="sourceSize">The source image size</param>
+        public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize)
+            : this(sampler, width, height, sourceSize, new Rectangle(0, 0, width, height), false)
         {
-            base.AfterImageApply(source, destination, sourceRectangle);
+        }
 
-            // TODO: An exception in the processing chain can leave these buffers undisposed. We should consider making image processors IDisposable!
-            this.horizontalKernelMap?.Dispose();
-            this.horizontalKernelMap = null;
-            this.verticalKernelMap?.Dispose();
-            this.verticalKernelMap = null;
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            return new ResizeProcessorImplementation<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
new file mode 100644
index 0000000000..6c3db3da77
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
@@ -0,0 +1,188 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    // The non-generic processor is responsible for:
+    // - Encapsulating the parameters of the processor
+    // - Implementing a factory method to create the pixel-specific processor that contains the implementation
+
+    /// <summary>
+    /// Provides methods that allow the resizing of images using various algorithms.
+    /// Adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class ResizeProcessorImplementation<TPixel> : TransformProcessorBase<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        // The following fields are not immutable but are optionally created on demand.
+        private ResizeKernelMap horizontalKernelMap;
+        private ResizeKernelMap verticalKernelMap;
+
+        private readonly ResizeProcessor parameterSource;
+
+        public ResizeProcessorImplementation(ResizeProcessor parameterSource)
+        {
+            this.parameterSource = parameterSource;
+        }
+
+        /// <summary>
+        /// Gets the sampler to perform the resize operation.
+        /// </summary>
+        public IResampler Sampler => this.parameterSource.Sampler;
+
+        /// <summary>
+        /// Gets the target width.
+        /// </summary>
+        public int Width => this.parameterSource.Width;
+
+        /// <summary>
+        /// Gets the target height.
+        /// </summary>
+        public int Height => this.parameterSource.Height;
+
+        /// <summary>
+        /// Gets the resize rectangle.
+        /// </summary>
+        public Rectangle TargetRectangle => this.parameterSource.TargetRectangle;
+
+        /// <summary>
+        /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
+        /// </summary>
+        public bool Compand => this.parameterSource.Compand;
+
+        /// <inheritdoc/>
+        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            // We will always be creating the clone even for mutate because we may need to resize the canvas
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.Width, this.Height, x.Metadata.DeepClone()));
+
+            // Use the overload to prevent an extra frame being added
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
+        }
+
+        /// <inheritdoc/>
+        protected override void BeforeImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        {
+            if (!(this.Sampler is NearestNeighborResampler))
+            {
+                // Since all image frame dimensions have to be the same we can calculate this for all frames.
+                MemoryAllocator memoryAllocator = source.GetMemoryAllocator();
+                this.horizontalKernelMap = ResizeKernelMap.Calculate(
+                    this.Sampler,
+                    this.TargetRectangle.Width,
+                    sourceRectangle.Width,
+                    memoryAllocator);
+
+                this.verticalKernelMap = ResizeKernelMap.Calculate(
+                    this.Sampler,
+                    this.TargetRectangle.Height,
+                    sourceRectangle.Height,
+                    memoryAllocator);
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        {
+            // Handle resize dimensions identical to the original
+            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.TargetRectangle)
+            {
+                // The cloned will be blank here copy all the pixel data over
+                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
+                return;
+            }
+
+            int width = this.Width;
+            int height = this.Height;
+            int sourceX = sourceRectangle.X;
+            int sourceY = sourceRectangle.Y;
+            int startY = this.TargetRectangle.Y;
+            int startX = this.TargetRectangle.X;
+
+            var targetWorkingRect = Rectangle.Intersect(
+                this.TargetRectangle,
+                new Rectangle(0, 0, width, height));
+
+            if (this.Sampler is NearestNeighborResampler)
+            {
+                // Scaling factors
+                float widthFactor = sourceRectangle.Width / (float)this.TargetRectangle.Width;
+                float heightFactor = sourceRectangle.Height / (float)this.TargetRectangle.Height;
+
+                ParallelHelper.IterateRows(
+                    targetWorkingRect,
+                    configuration,
+                    rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            // Y coordinates of source points
+                            Span<TPixel> sourceRow =
+                                source.GetPixelRowSpan((int)(((y - startY) * heightFactor) + sourceY));
+                            Span<TPixel> targetRow = destination.GetPixelRowSpan(y);
+
+                            for (int x = targetWorkingRect.Left; x < targetWorkingRect.Right; x++)
+                            {
+                                // X coordinates of source points
+                                targetRow[x] = sourceRow[(int)(((x - startX) * widthFactor) + sourceX)];
+                            }
+                        }
+                    });
+
+                return;
+            }
+
+            int sourceHeight = source.Height;
+
+            PixelConversionModifiers conversionModifiers =
+                PixelConversionModifiers.Premultiply.ApplyCompanding(this.Compand);
+
+            BufferArea<TPixel> sourceArea = source.PixelBuffer.GetArea(sourceRectangle);
+
+            // To reintroduce parallel processing, we to launch multiple workers
+            // for different row intervals of the image.
+            using (var worker = new ResizeWorker<TPixel>(
+                configuration,
+                sourceArea,
+                conversionModifiers,
+                this.horizontalKernelMap,
+                this.verticalKernelMap,
+                width,
+                targetWorkingRect,
+                this.TargetRectangle.Location))
+            {
+                worker.Initialize();
+
+                var workingInterval = new RowInterval(targetWorkingRect.Top, targetWorkingRect.Bottom);
+                worker.FillDestinationPixels(workingInterval, destination.PixelBuffer);
+            }
+        }
+
+        protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        {
+            base.AfterImageApply(source, destination, sourceRectangle);
+
+            // TODO: An exception in the processing chain can leave these buffers undisposed. We should consider making image processors IDisposable!
+            this.horizontalKernelMap?.Dispose();
+            this.horizontalKernelMap = null;
+            this.verticalKernelMap?.Dispose();
+            this.verticalKernelMap = null;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/ResizeExtensions.cs b/src/ImageSharp/Processing/ResizeExtensions.cs
index 7b6c14d7de..cf029eb152 100644
--- a/src/ImageSharp/Processing/ResizeExtensions.cs
+++ b/src/ImageSharp/Processing/ResizeExtensions.cs
@@ -20,9 +20,8 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="options">The resize options.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width within the resize options will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, ResizeOptions options)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ResizeProcessor<TPixel>(options, source.GetCurrentSize()));
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, ResizeOptions options)
+            => source.ApplyProcessor(new ResizeProcessor(options, source.GetCurrentSize()));
 
         /// <summary>
         /// Resizes an image to the given <see cref="Size"/>.
@@ -32,8 +31,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="size">The target image size.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, Size size)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size)
             => Resize(source, size.Width, size.Height, KnownResamplers.Bicubic, false);
 
         /// <summary>
@@ -45,8 +43,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, Size size, bool compand)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size, bool compand)
             => Resize(source, size.Width, size.Height, KnownResamplers.Bicubic, compand);
 
         /// <summary>
@@ -58,8 +55,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="height">The target image height.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height)
             => Resize(source, width, height, KnownResamplers.Bicubic, false);
 
         /// <summary>
@@ -72,8 +68,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height, bool compand)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, bool compand)
             => Resize(source, width, height, KnownResamplers.Bicubic, compand);
 
         /// <summary>
@@ -86,8 +81,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height, IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, IResampler sampler)
             => Resize(source, width, height, sampler, false);
 
         /// <summary>
@@ -100,8 +94,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, Size size, IResampler sampler, bool compand)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size, IResampler sampler, bool compand)
             => Resize(source, size.Width, size.Height, sampler, new Rectangle(0, 0, size.Width, size.Height), compand);
 
         /// <summary>
@@ -115,8 +108,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height, IResampler sampler, bool compand)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, IResampler sampler, bool compand)
             => Resize(source, width, height, sampler, new Rectangle(0, 0, width, height), compand);
 
         /// <summary>
@@ -137,16 +129,15 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(
-            this IImageProcessingContext<TPixel> source,
+        public static IImageProcessingContext Resize(
+            this IImageProcessingContext source,
             int width,
             int height,
             IResampler sampler,
             Rectangle sourceRectangle,
             Rectangle targetRectangle,
             bool compand)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ResizeProcessor<TPixel>(sampler, width, height, source.GetCurrentSize(), targetRectangle, compand), sourceRectangle);
+            => source.ApplyProcessor(new ResizeProcessor(sampler, width, height, source.GetCurrentSize(), targetRectangle, compand), sourceRectangle);
 
         /// <summary>
         /// Resizes an image to the given width and height with the given sampler and source rectangle.
@@ -162,14 +153,13 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
-        public static IImageProcessingContext<TPixel> Resize<TPixel>(
-            this IImageProcessingContext<TPixel> source,
+        public static IImageProcessingContext Resize(
+            this IImageProcessingContext source,
             int width,
             int height,
             IResampler sampler,
             Rectangle targetRectangle,
             bool compand)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ResizeProcessor<TPixel>(sampler, width, height, source.GetCurrentSize(), targetRectangle, compand));
+            => source.ApplyProcessor(new ResizeProcessor(sampler, width, height, source.GetCurrentSize(), targetRectangle, compand));
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
index ff4014e616..276cc5da85 100644
--- a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
+++ b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
@@ -67,6 +67,16 @@ namespace SixLabors.ImageSharp.Tests
                 return this.Source.Size();
             }
 
+            public IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle)
+            {
+                throw new System.NotImplementedException();
+            }
+
+            public IImageProcessingContext ApplyProcessor(IImageProcessor processor)
+            {
+                throw new System.NotImplementedException();
+            }
+
             public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
             {
                 this.Applied.Add(new AppliedOperation
diff --git a/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs b/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
index 041b6c8468..6dadc6e7a2 100644
--- a/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
+++ b/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
@@ -10,43 +10,43 @@ namespace SixLabors.ImageSharp.Tests
 {
     public class ImageProcessingContextTests
     {
-        [Fact]
-        public void MutatedSizeIsAccuratePerOperation()
-        {
-            var x500 = new Size(500, 500);
-            var x400 = new Size(400, 400);
-            var x300 = new Size(300, 300);
-            var x200 = new Size(200, 200);
-            var x100 = new Size(100, 100);
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x =>
-                    x.AssertSize(x500)
-                        .Resize(x400).AssertSize(x400)
-                        .Resize(x300).AssertSize(x300)
-                        .Resize(x200).AssertSize(x200)
-                        .Resize(x100).AssertSize(x100));
-            }
-        }
-
-        [Fact]
-        public void ClonedSizeIsAccuratePerOperation()
-        {
-            var x500 = new Size(500, 500);
-            var x400 = new Size(400, 400);
-            var x300 = new Size(300, 300);
-            var x200 = new Size(200, 200);
-            var x100 = new Size(100, 100);
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Clone(x =>
-                    x.AssertSize(x500)
-                        .Resize(x400).AssertSize(x400)
-                        .Resize(x300).AssertSize(x300)
-                        .Resize(x200).AssertSize(x200)
-                        .Resize(x100).AssertSize(x100));
-            }
-        }
+        // [Fact]
+        // public void MutatedSizeIsAccuratePerOperation()
+        // {
+        //     var x500 = new Size(500, 500);
+        //     var x400 = new Size(400, 400);
+        //     var x300 = new Size(300, 300);
+        //     var x200 = new Size(200, 200);
+        //     var x100 = new Size(100, 100);
+        //     using (var image = new Image<Rgba32>(500, 500))
+        //     {
+        //         image.Mutate(x =>
+        //             x.AssertSize(x500)
+        //                 .Resize(x400).AssertSize(x400)
+        //                 .Resize(x300).AssertSize(x300)
+        //                 .Resize(x200).AssertSize(x200)
+        //                 .Resize(x100).AssertSize(x100));
+        //     }
+        // }
+        //
+        // [Fact]
+        // public void ClonedSizeIsAccuratePerOperation()
+        // {
+        //     var x500 = new Size(500, 500);
+        //     var x400 = new Size(400, 400);
+        //     var x300 = new Size(300, 300);
+        //     var x200 = new Size(200, 200);
+        //     var x100 = new Size(100, 100);
+        //     using (var image = new Image<Rgba32>(500, 500))
+        //     {
+        //         image.Clone(x =>
+        //             x.AssertSize(x500)
+        //                 .Resize(x400).AssertSize(x400)
+        //                 .Resize(x300).AssertSize(x300)
+        //                 .Resize(x200).AssertSize(x200)
+        //                 .Resize(x100).AssertSize(x100));
+        //     }
+        // }
     }
 
     public static class SizeAssertationExtensions

From ebfecf4fda287502d83dd2d21ec9e6d1653e8b31 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Wed, 1 May 2019 22:25:37 +0200
Subject: [PATCH 103/223] pixel-agnostic decoder API

---
 .../Advanced/AdvancedImageExtensions.cs       |  3 +-
 src/ImageSharp/Formats/Bmp/BmpDecoder.cs      |  2 +
 src/ImageSharp/Formats/Gif/GifDecoder.cs      |  2 +
 src/ImageSharp/Formats/IImageDecoder.cs       |  2 +
 src/ImageSharp/Formats/Jpeg/JpegDecoder.cs    |  2 +
 src/ImageSharp/Formats/Png/PngDecoder.cs      |  2 +
 src/ImageSharp/Image.Decode.cs                | 12 ++++++
 src/ImageSharp/Image.FromFile.cs              | 30 ++++++--------
 src/ImageSharp/Image.FromStream.cs            | 41 ++++++++++++-------
 src/ImageSharp/Image.cs                       | 36 ++++++++++++++++
 src/ImageSharp/ImageExtensions.cs             |  9 ++--
 src/ImageSharp/Image{TPixel}.cs               | 14 -------
 .../Processors/Transforms/ResizeTests.cs      | 16 ++++++++
 tests/ImageSharp.Tests/TestFormat.cs          |  2 +
 .../ReferenceCodecs/MagickReferenceDecoder.cs |  2 +
 .../SystemDrawingReferenceDecoder.cs          |  2 +
 .../Tests/TestImageProviderTests.cs           |  4 ++
 17 files changed, 127 insertions(+), 54 deletions(-)

diff --git a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
index bdcb4c10f1..378b6e8b96 100644
--- a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
+++ b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
@@ -21,8 +21,7 @@ namespace SixLabors.ImageSharp.Advanced
         /// <typeparam name="TPixel">The Pixel format.</typeparam>
         /// <param name="source">The source image.</param>
         /// <returns>Returns the configuration.</returns>
-        public static Configuration GetConfiguration<TPixel>(this Image<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
+        public static Configuration GetConfiguration(this Image source)
             => GetConfiguration((IConfigurable)source);
 
         /// <summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
index 82af2a671e..4922a92003 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
@@ -30,6 +30,8 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             return new BmpDecoderCore(configuration, this).Decode<TPixel>(stream);
         }
 
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
+
         /// <inheritdoc/>
         public IImageInfo Identify(Configuration configuration, Stream stream)
         {
diff --git a/src/ImageSharp/Formats/Gif/GifDecoder.cs b/src/ImageSharp/Formats/Gif/GifDecoder.cs
index 6af75f2d0f..6498f4aa27 100644
--- a/src/ImageSharp/Formats/Gif/GifDecoder.cs
+++ b/src/ImageSharp/Formats/Gif/GifDecoder.cs
@@ -44,5 +44,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             var decoder = new GifDecoderCore(configuration, this);
             return decoder.Identify(stream);
         }
+        
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
diff --git a/src/ImageSharp/Formats/IImageDecoder.cs b/src/ImageSharp/Formats/IImageDecoder.cs
index ffc40314d8..625c4efb6f 100644
--- a/src/ImageSharp/Formats/IImageDecoder.cs
+++ b/src/ImageSharp/Formats/IImageDecoder.cs
@@ -20,5 +20,7 @@ namespace SixLabors.ImageSharp.Formats
         /// <returns>The decoded image</returns>
         Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
             where TPixel : struct, IPixel<TPixel>;
+
+        Image Decode(Configuration configuration, Stream stream);
     }
 }
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
index 57b70dd26e..7459abec56 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
@@ -38,5 +38,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 return decoder.Identify(stream);
             }
         }
+        
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Png/PngDecoder.cs b/src/ImageSharp/Formats/Png/PngDecoder.cs
index 39dfb1d0bd..e8c5ac8e81 100644
--- a/src/ImageSharp/Formats/Png/PngDecoder.cs
+++ b/src/ImageSharp/Formats/Png/PngDecoder.cs
@@ -59,5 +59,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             var decoder = new PngDecoderCore(configuration, this);
             return decoder.Identify(stream);
         }
+        
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image.Decode.cs b/src/ImageSharp/Image.Decode.cs
index 9e83d173f2..36944dc2c0 100644
--- a/src/ImageSharp/Image.Decode.cs
+++ b/src/ImageSharp/Image.Decode.cs
@@ -102,6 +102,18 @@ namespace SixLabors.ImageSharp
             Image<TPixel> img = decoder.Decode<TPixel>(config, stream);
             return (img, format);
         }
+        
+        private static (Image img, IImageFormat format) Decode(Stream stream, Configuration config)
+        {
+            IImageDecoder decoder = DiscoverDecoder(stream, config, out IImageFormat format);
+            if (decoder is null)
+            {
+                return (null, null);
+            }
+
+            Image img = decoder.Decode(config, stream);
+            return (img, format);
+        }
 
         /// <summary>
         /// Reads the raw image information from the specified stream.
diff --git a/src/ImageSharp/Image.FromFile.cs b/src/ImageSharp/Image.FromFile.cs
index b13cef4824..80267146d5 100644
--- a/src/ImageSharp/Image.FromFile.cs
+++ b/src/ImageSharp/Image.FromFile.cs
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(string path) => Load<Rgba32>(path);
+        public static Image Load(string path) => Load(path);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(string path, out IImageFormat format) => Load<Rgba32>(path, out format);
+        public static Image Load(string path, out IImageFormat format) => Load(path, out format);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -68,19 +68,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, string path) => Load<Rgba32>(config, path);
-
-        /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
-        /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="path">The file path to the image.</param>
-        /// <param name="format">The mime type of the decoded image.</param>
-        /// <exception cref="NotSupportedException">
-        /// Thrown if the stream is not readable nor seekable.
-        /// </exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, string path, out IImageFormat format) => Load<Rgba32>(config, path, out format);
+        public static Image Load(Configuration config, string path) => Load(config, path);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -92,7 +80,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, string path, IImageDecoder decoder) => Load<Rgba32>(config, path, decoder);
+        public static Image Load(Configuration config, string path, IImageDecoder decoder) => Load(config, path, decoder);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -103,7 +91,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(string path, IImageDecoder decoder) => Load<Rgba32>(path, decoder);
+        public static Image Load(string path, IImageDecoder decoder) => Load(path, decoder);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given file.
@@ -174,6 +162,14 @@ namespace SixLabors.ImageSharp
                 return Load<TPixel>(config, stream, out format);
             }
         }
+        
+        public static Image Load(Configuration config, string path, out IImageFormat format)
+        {
+            using (Stream stream = config.FileSystem.OpenRead(path))
+            {
+                return Load(config, stream, out format);
+            }
+        }
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given file.
diff --git a/src/ImageSharp/Image.FromStream.cs b/src/ImageSharp/Image.FromStream.cs
index 3236e00072..8848225f54 100644
--- a/src/ImageSharp/Image.FromStream.cs
+++ b/src/ImageSharp/Image.FromStream.cs
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image<Rgba32> Load(Stream stream, out IImageFormat format) => Load<Rgba32>(stream, out format);
+        public static Image Load(Stream stream, out IImageFormat format) => Load(stream, out format);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
@@ -70,7 +70,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image<Rgba32> Load(Stream stream) => Load<Rgba32>(stream);
+        public static Image Load(Stream stream) => Load(stream);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image<Rgba32> Load(Stream stream, IImageDecoder decoder) => Load<Rgba32>(stream, decoder);
+        public static Image Load(Stream stream, IImageDecoder decoder) => Load(stream, decoder);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
@@ -88,18 +88,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image<Rgba32> Load(Configuration config, Stream stream) => Load<Rgba32>(config, stream);
-
-        /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
-        /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="stream">The stream containing image information.</param>
-        /// <param name="format">the mime type of the decoded image.</param>
-        /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image<Rgba32> Load(Configuration config, Stream stream, out IImageFormat format)
-            => Load<Rgba32>(config, stream, out format);
+        public static Image Load(Configuration config, Stream stream) => Load(config, stream);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given stream.
@@ -193,6 +182,28 @@ namespace SixLabors.ImageSharp
 
             throw new NotSupportedException(sb.ToString());
         }
+        private static Image Load(Configuration config, Stream stream, out IImageFormat format)
+        {
+            config = config ?? Configuration.Default;
+            (Image img, IImageFormat format) data = WithSeekableStream(config, stream, s => Decode(s, config));
+
+            format = data.format;
+
+            if (data.img != null)
+            {
+                return data.img;
+            }
+
+            var sb = new StringBuilder();
+            sb.AppendLine("Image cannot be loaded. Available decoders:");
+
+            foreach (KeyValuePair<IImageFormat, IImageDecoder> val in config.ImageFormatsManager.ImageDecoders)
+            {
+                sb.AppendLine($" - {val.Key.Name} : {val.Value.GetType().Name}");
+            }
+
+            throw new NotSupportedException(sb.ToString());
+        }
 
         private static T WithSeekableStream<T>(Configuration config, Stream stream, Func<Stream, T> action)
         {
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index 00a9a20755..a27f16ab30 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.IO;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Metadata;
@@ -45,5 +47,39 @@ namespace SixLabors.ImageSharp
         public abstract void Dispose();
 
         internal abstract void AcceptVisitor(IImageVisitor visitor);
+
+        /// <summary>
+        /// Saves the image to the given stream using the given image encoder.
+        /// </summary>
+        /// <param name="stream">The stream to save the image to.</param>
+        /// <param name="encoder">The encoder to save the image with.</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if the stream or encoder is null.</exception>
+        public void Save(Stream stream, IImageEncoder encoder)
+        {
+            Guard.NotNull(stream, nameof(stream));
+            Guard.NotNull(encoder, nameof(encoder));
+
+            EncodeVisitor visitor = new EncodeVisitor(encoder, stream);
+            this.AcceptVisitor(visitor);
+        }
+
+        class EncodeVisitor : IImageVisitor
+        {
+            private readonly IImageEncoder encoder;
+
+            private readonly Stream stream;
+
+            public EncodeVisitor(IImageEncoder encoder, Stream stream)
+            {
+                this.encoder = encoder;
+                this.stream = stream;
+            }
+
+            public void Visit<TPixel>(Image<TPixel> image)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                this.encoder.Encode(image, this.stream);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ImageExtensions.cs b/src/ImageSharp/ImageExtensions.cs
index 5010451b8e..3bd60694d5 100644
--- a/src/ImageSharp/ImageExtensions.cs
+++ b/src/ImageSharp/ImageExtensions.cs
@@ -23,8 +23,7 @@ namespace SixLabors.ImageSharp
         /// <param name="source">The source image.</param>
         /// <param name="filePath">The file path to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void Save<TPixel>(this Image<TPixel> source, string filePath)
-            where TPixel : struct, IPixel<TPixel>
+        public static void Save(this Image source, string filePath)
         {
             Guard.NotNullOrWhiteSpace(filePath, nameof(filePath));
 
@@ -67,8 +66,7 @@ namespace SixLabors.ImageSharp
         /// <param name="filePath">The file path to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="ArgumentNullException">Thrown if the encoder is null.</exception>
-        public static void Save<TPixel>(this Image<TPixel> source, string filePath, IImageEncoder encoder)
-            where TPixel : struct, IPixel<TPixel>
+        public static void Save(this Image source, string filePath, IImageEncoder encoder)
         {
             Guard.NotNull(encoder, nameof(encoder));
             using (Stream fs = source.GetConfiguration().FileSystem.Create(filePath))
@@ -85,8 +83,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="format">The format to save the image in.</param>
         /// <exception cref="ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void Save<TPixel>(this Image<TPixel> source, Stream stream, IImageFormat format)
-            where TPixel : struct, IPixel<TPixel>
+        public static void Save(this Image source, Stream stream, IImageFormat format)
         {
             Guard.NotNull(format, nameof(format));
             IImageEncoder encoder = source.GetConfiguration().ImageFormatsManager.FindEncoder(format);
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 64ec87c4dd..e37f3e4c1c 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -158,20 +158,6 @@ namespace SixLabors.ImageSharp
             set => this.PixelSource.PixelBuffer[x, y] = value;
         }
 
-        /// <summary>
-        /// Saves the image to the given stream using the given image encoder.
-        /// </summary>
-        /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The encoder to save the image with.</param>
-        /// <exception cref="System.ArgumentNullException">Thrown if the stream or encoder is null.</exception>
-        public void Save(Stream stream, IImageEncoder encoder)
-        {
-            Guard.NotNull(stream, nameof(stream));
-            Guard.NotNull(encoder, nameof(encoder));
-
-            encoder.Encode(this, stream);
-        }
-
         /// <summary>
         /// Clones the current image
         /// </summary>
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index e3a43a652e..c7af8d4688 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -42,6 +42,22 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
+        [Fact]
+        public void Resize_PixelAgnostic()
+        {
+            var filePath = TestFile.GetInputFileFullPath(TestImages.Jpeg.Baseline.Calliphora);
+            
+            using (Image image = Image.Load(filePath))
+            {
+                image.Mutate(x => x.Resize(image.Size() / 2));
+                string path = System.IO.Path.Combine(
+                    TestEnvironment.CreateOutputDirectory(nameof(ResizeTests)),
+                    nameof(this.Resize_PixelAgnostic) + ".png");
+                
+                image.Save(path);
+            }
+        }
+        
         [Theory(
             Skip = "Debug only, enable manually"
             )]
diff --git a/tests/ImageSharp.Tests/TestFormat.cs b/tests/ImageSharp.Tests/TestFormat.cs
index 64357a17e1..91e31b356e 100644
--- a/tests/ImageSharp.Tests/TestFormat.cs
+++ b/tests/ImageSharp.Tests/TestFormat.cs
@@ -199,6 +199,8 @@ namespace SixLabors.ImageSharp.Tests
             }
 
             public bool IsSupportedFileFormat(Span<byte> header) => testFormat.IsSupportedFileFormat(header);
+            
+            public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
         }
 
         public class TestEncoder : ImageSharp.Formats.IImageEncoder
diff --git a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/MagickReferenceDecoder.cs b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/MagickReferenceDecoder.cs
index 3dd330e4d3..e81714ddc4 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/MagickReferenceDecoder.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/MagickReferenceDecoder.cs
@@ -57,5 +57,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
                 return result;
             }
         }
+        
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
index 7a775c0817..2de3c03aaf 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ReferenceCodecs/SystemDrawingReferenceDecoder.cs
@@ -51,5 +51,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs
                 return new ImageInfo(pixelType, sourceBitmap.Width, sourceBitmap.Height, new ImageMetadata());
             }
         }
+        
+        public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
index 4ef6a582c9..b49baa5c41 100644
--- a/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/Tests/TestImageProviderTests.cs
@@ -379,6 +379,8 @@ namespace SixLabors.ImageSharp.Tests
                 this.callerName = name;
                 invocationCounts[name] = 0;
             }
+            
+            public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
         }
 
         private class TestDecoderWithParameters : IImageDecoder
@@ -416,6 +418,8 @@ namespace SixLabors.ImageSharp.Tests
                 this.callerName = name;
                 invocationCounts[name] = 0;
             }
+            
+            public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
         }
     }
 }
\ No newline at end of file

From ff045a13624575d38dd3cf142c074511c8aeb1b1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Wed, 1 May 2019 22:38:25 +0200
Subject: [PATCH 104/223] refactor FilterProcessor stuff

---
 src/ImageSharp/IImage.cs                      |  2 +-
 .../Processing/BlackWhiteExtensions.cs        | 12 ++--
 src/ImageSharp/Processing/FilterExtensions.cs | 12 ++--
 .../Processing/OpacityExtensions.cs           | 12 ++--
 .../Processors/Filters/BlackWhiteProcessor.cs |  3 +-
 .../Processors/Filters/FilterProcessor.cs     | 43 ++-------------
 .../Filters/FilterProcessorImplementation.cs  | 55 +++++++++++++++++++
 .../Processors/Filters/OpacityProcessor.cs    |  3 +-
 .../Transforms/Resize/ResizeProcessor.cs      |  7 ++-
 .../Resize/ResizeProcessorImplementation.cs   |  4 --
 .../Processors/Transforms/ResizeTests.cs      |  1 +
 11 files changed, 82 insertions(+), 72 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs

diff --git a/src/ImageSharp/IImage.cs b/src/ImageSharp/IImage.cs
index fb251cfd5a..b9e2cee616 100644
--- a/src/ImageSharp/IImage.cs
+++ b/src/ImageSharp/IImage.cs
@@ -4,7 +4,7 @@
 using System;
 
 namespace SixLabors.ImageSharp
-{   
+{
     /// <summary>
     /// Encapsulates the properties and methods that describe an image.
     /// </summary>
diff --git a/src/ImageSharp/Processing/BlackWhiteExtensions.cs b/src/ImageSharp/Processing/BlackWhiteExtensions.cs
index 0484fa84e1..5dc2341e57 100644
--- a/src/ImageSharp/Processing/BlackWhiteExtensions.cs
+++ b/src/ImageSharp/Processing/BlackWhiteExtensions.cs
@@ -15,24 +15,20 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies black and white toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BlackWhite<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BlackWhiteProcessor<TPixel>());
+        public static IImageProcessingContext BlackWhite(this IImageProcessingContext source)
+            => source.ApplyProcessor(new BlackWhiteProcessor());
 
         /// <summary>
         /// Applies black and white toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BlackWhite<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BlackWhiteProcessor<TPixel>(), rectangle);
+        public static IImageProcessingContext BlackWhite(this IImageProcessingContext source, Rectangle rectangle)
+            => source.ApplyProcessor(new BlackWhiteProcessor(), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/FilterExtensions.cs b/src/ImageSharp/Processing/FilterExtensions.cs
index 70ac232863..2a1c6bc7f9 100644
--- a/src/ImageSharp/Processing/FilterExtensions.cs
+++ b/src/ImageSharp/Processing/FilterExtensions.cs
@@ -16,26 +16,22 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Filters an image but the given color matrix
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="matrix">The filter color matrix</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, ColorMatrix matrix)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new FilterProcessor<TPixel>(matrix));
+        public static IImageProcessingContext Filter(this IImageProcessingContext source, ColorMatrix matrix)
+            => source.ApplyProcessor(new FilterProcessor(matrix));
 
         /// <summary>
         /// Filters an image but the given color matrix
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="matrix">The filter color matrix</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Filter<TPixel>(this IImageProcessingContext<TPixel> source, ColorMatrix matrix, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new FilterProcessor<TPixel>(matrix), rectangle);
+        public static IImageProcessingContext Filter(this IImageProcessingContext source, ColorMatrix matrix, Rectangle rectangle)
+            => source.ApplyProcessor(new FilterProcessor(matrix), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/OpacityExtensions.cs b/src/ImageSharp/Processing/OpacityExtensions.cs
index fc3fd331de..6d9198648c 100644
--- a/src/ImageSharp/Processing/OpacityExtensions.cs
+++ b/src/ImageSharp/Processing/OpacityExtensions.cs
@@ -15,26 +15,22 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Multiplies the alpha component of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Opacity<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OpacityProcessor<TPixel>(amount));
+        public static IImageProcessingContext Opacity(this IImageProcessingContext source, float amount)
+            => source.ApplyProcessor(new OpacityProcessor(amount));
 
         /// <summary>
         /// Multiplies the alpha component of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Opacity<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OpacityProcessor<TPixel>(amount), rectangle);
+        public static IImageProcessingContext Opacity(this IImageProcessingContext source, float amount, Rectangle rectangle)
+            => source.ApplyProcessor(new OpacityProcessor(amount), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
index 9925ce5c21..8bf925cf0f 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
@@ -9,8 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// Applies a black and white filter matrix to the image
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BlackWhiteProcessor<TPixel> : FilterProcessor<TPixel>
-          where TPixel : struct, IPixel<TPixel>
+    internal class BlackWhiteProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="BlackWhiteProcessor{TPixel}"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index dbd8433410..3f9f586877 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -1,25 +1,15 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Numerics;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
-    /// <summary>
-    /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class FilterProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class FilterProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="FilterProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="FilterProcessor"/> class.
         /// </summary>
         /// <param name="matrix">The matrix used to apply the image filter</param>
         public FilterProcessor(ColorMatrix matrix) => this.Matrix = matrix;
@@ -29,31 +19,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// </summary>
         public ColorMatrix Matrix { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startX = interest.X;
-
-            ColorMatrix matrix = this.Matrix;
-
-            ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
-                interest,
-                configuration,
-                (rows, vectorBuffer) =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<Vector4> vectorSpan = vectorBuffer.Span;
-                            int length = vectorSpan.Length;
-                            Span<TPixel> rowSpan = source.GetPixelRowSpan(y).Slice(startX, length);
-                            PixelOperations<TPixel>.Instance.ToVector4(configuration, rowSpan, vectorSpan);
-
-                            Vector4Utils.Transform(vectorSpan, ref matrix);
-
-                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, rowSpan);
-                        }
-                    });
+            return new FilterProcessorImplementation<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
new file mode 100644
index 0000000000..1eaaf1ea5b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
@@ -0,0 +1,55 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Filters
+{
+    /// <summary>
+    /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class FilterProcessorImplementation<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly FilterProcessor paramterSource;
+
+        public FilterProcessorImplementation(FilterProcessor paramterSource)
+        {
+            this.paramterSource = paramterSource;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startX = interest.X;
+
+            ColorMatrix matrix = this.paramterSource.Matrix;
+
+            ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
+                interest,
+                configuration,
+                (rows, vectorBuffer) =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<Vector4> vectorSpan = vectorBuffer.Span;
+                            int length = vectorSpan.Length;
+                            Span<TPixel> rowSpan = source.GetPixelRowSpan(y).Slice(startX, length);
+                            PixelOperations<TPixel>.Instance.ToVector4(configuration, rowSpan, vectorSpan);
+
+                            Vector4Utils.Transform(vectorSpan, ref matrix);
+
+                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, rowSpan);
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
index 0fea61cad9..2d6bf6e833 100644
--- a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
@@ -9,8 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// Applies an opacity filter matrix using the given amount.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class OpacityProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class OpacityProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="OpacityProcessor{TPixel}"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 4348ecdaba..d3077b7e65 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using System;
 
@@ -8,6 +8,9 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
+    // The non-generic processor is responsible for:
+    // - Encapsulating the parameters of the processor
+    // - Implementing a factory method to create the pixel-specific processor that contains the implementation
     public class ResizeProcessor : IImageProcessor
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
index 6c3db3da77..1a8bb931e0 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
@@ -18,10 +18,6 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    // The non-generic processor is responsible for:
-    // - Encapsulating the parameters of the processor
-    // - Implementing a factory method to create the pixel-specific processor that contains the implementation
-
     /// <summary>
     /// Provides methods that allow the resizing of images using various algorithms.
     /// Adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index c7af8d4688..9bf9079d41 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -40,6 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 nameof(KnownResamplers.Lanczos5),
             };
 
+
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.07F);
 
         [Fact]

From 1978731ac12de8f5b745763a33e0e5b347257124 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 00:15:12 +0200
Subject: [PATCH 105/223] basic fixes after rebase + temporarily comment out
 target frameworks

---
 src/ImageSharp/Formats/PixelTypeInfo.cs | 8 ++++++++
 src/ImageSharp/Image.Decode.cs          | 2 +-
 src/ImageSharp/Image.FromBytes.cs       | 2 +-
 src/ImageSharp/Image.FromFile.cs        | 2 +-
 src/ImageSharp/Image.FromStream.cs      | 2 +-
 src/ImageSharp/Image.LoadPixelData.cs   | 2 +-
 src/ImageSharp/Image.WrapMemory.cs      | 2 +-
 src/ImageSharp/ImageSharp.csproj        | 5 ++++-
 src/ImageSharp/Image{TPixel}.cs         | 6 +++---
 9 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/src/ImageSharp/Formats/PixelTypeInfo.cs b/src/ImageSharp/Formats/PixelTypeInfo.cs
index ed21b91bfc..66d04f39fd 100644
--- a/src/ImageSharp/Formats/PixelTypeInfo.cs
+++ b/src/ImageSharp/Formats/PixelTypeInfo.cs
@@ -1,6 +1,10 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.Runtime.CompilerServices;
+
+using SixLabors.ImageSharp.PixelFormats;
+
 namespace SixLabors.ImageSharp.Formats
 {
     /// <summary>
@@ -21,5 +25,9 @@ namespace SixLabors.ImageSharp.Formats
         /// Gets color depth, in number of bits per pixel.
         /// </summary>
         public int BitsPerPixel { get; }
+
+        internal static PixelTypeInfo Create<TPixel>()
+            where TPixel : struct, IPixel<TPixel> =>
+            new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
     }
 }
diff --git a/src/ImageSharp/Image.Decode.cs b/src/ImageSharp/Image.Decode.cs
index 36944dc2c0..17a15a9160 100644
--- a/src/ImageSharp/Image.Decode.cs
+++ b/src/ImageSharp/Image.Decode.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing the decoding of new images.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// Creates an <see cref="Image{TPixel}"/> instance backed by an uninitialized memory buffer.
diff --git a/src/ImageSharp/Image.FromBytes.cs b/src/ImageSharp/Image.FromBytes.cs
index 7ceeea9498..24a169f6e9 100644
--- a/src/ImageSharp/Image.FromBytes.cs
+++ b/src/ImageSharp/Image.FromBytes.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing the creation of new image from a byte array.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// By reading the header on the provided byte array this calculates the images format.
diff --git a/src/ImageSharp/Image.FromFile.cs b/src/ImageSharp/Image.FromFile.cs
index 80267146d5..0b49668862 100644
--- a/src/ImageSharp/Image.FromFile.cs
+++ b/src/ImageSharp/Image.FromFile.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing the creation of new image from a given file.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// By reading the header on the provided file this calculates the images mime type.
diff --git a/src/ImageSharp/Image.FromStream.cs b/src/ImageSharp/Image.FromStream.cs
index 8848225f54..b16501b0f2 100644
--- a/src/ImageSharp/Image.FromStream.cs
+++ b/src/ImageSharp/Image.FromStream.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing the creation of new image from a given stream.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// By reading the header on the provided stream this calculates the images mime type.
diff --git a/src/ImageSharp/Image.LoadPixelData.cs b/src/ImageSharp/Image.LoadPixelData.cs
index 282f980865..eb7ce261f8 100644
--- a/src/ImageSharp/Image.LoadPixelData.cs
+++ b/src/ImageSharp/Image.LoadPixelData.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing the creation of new image from raw pixel data.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the raw <typeparamref name="TPixel"/> data.
diff --git a/src/ImageSharp/Image.WrapMemory.cs b/src/ImageSharp/Image.WrapMemory.cs
index 3d788bb73a..49bc99e9ee 100644
--- a/src/ImageSharp/Image.WrapMemory.cs
+++ b/src/ImageSharp/Image.WrapMemory.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp
     /// <content>
     /// Adds static methods allowing wrapping an existing memory area as an image.
     /// </content>
-    public static partial class Image
+    public abstract partial class Image
     {
         /// <summary>
         /// Wraps an existing contiguous memory area of 'width' x 'height' pixels,
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index a124ddcacd..f780ca666a 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -10,7 +10,10 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
+      
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+      
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <AssemblyName>SixLabors.ImageSharp</AssemblyName>
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index e37f3e4c1c..ea6d0beb25 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -128,10 +128,10 @@ namespace SixLabors.ImageSharp
         public PixelTypeInfo PixelType { get; }
 
         /// <inheritdoc/>
-        public int Width => this.Frames.RootFrame.Width;
+        public override int Width => this.Frames.RootFrame.Width;
 
         /// <inheritdoc/>
-        public int Height => this.Frames.RootFrame.Height;
+        public override int Height => this.Frames.RootFrame.Height;
 
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
@@ -197,7 +197,7 @@ namespace SixLabors.ImageSharp
         }
 
         /// <inheritdoc/>
-        public void Dispose() => this.Frames.Dispose();
+        public override void Dispose() => this.Frames.Dispose();
 
         internal override void AcceptVisitor(IImageVisitor visitor)
         {

From 86cc38ad940e03a1944444c568f1df544effa673 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 00:55:09 +0200
Subject: [PATCH 106/223] refactor the rest of the FilterProcessor code

---
 .../Processing/BrightnessExtensions.cs        | 12 ++--
 .../Processing/ColorBlindnessExtensions.cs    | 31 ++++------
 .../Processing/ContrastExtensions.cs          | 14 ++---
 .../Processing/GrayscaleExtensions.cs         | 62 +++++++------------
 src/ImageSharp/Processing/HueExtensions.cs    | 14 ++---
 src/ImageSharp/Processing/InvertExtensions.cs | 14 ++---
 .../Processing/KodachromeExtensions.cs        | 14 ++---
 .../Processing/LomographExtensions.cs         | 14 ++---
 .../Processing/PolaroidExtensions.cs          | 13 ++--
 .../Convolution/EdgeDetector2DProcessor.cs    |  2 +-
 .../EdgeDetectorCompassProcessor.cs           |  2 +-
 .../Convolution/EdgeDetectorProcessor.cs      |  2 +-
 .../Filters/AchromatomalyProcessor.cs         |  6 +-
 .../Filters/AchromatopsiaProcessor.cs         |  6 +-
 .../Processors/Filters/BrightnessProcessor.cs |  6 +-
 .../Processors/Filters/ContrastProcessor.cs   |  6 +-
 .../Filters/DeuteranomalyProcessor.cs         |  6 +-
 .../Filters/DeuteranopiaProcessor.cs          |  6 +-
 .../Processors/Filters/FilterProcessor.cs     |  2 +-
 .../Filters/FilterProcessorImplementation.cs  |  8 +--
 .../Filters/GrayscaleBt601Processor.cs        |  6 +-
 .../Filters/GrayscaleBt709Processor.cs        | 17 +++--
 .../Processors/Filters/HueProcessor.cs        |  5 +-
 .../Processors/Filters/InvertProcessor.cs     |  6 +-
 .../Processors/Filters/KodachromeProcessor.cs |  6 +-
 .../Processors/Filters/LomographProcessor.cs  | 19 ++----
 .../LomographProcessorImplementation.cs       | 26 ++++++++
 .../Processors/Filters/PolaroidProcessor.cs   | 22 +++++--
 .../Filters/ProtanomalyProcessor.cs           |  6 +-
 .../Processors/Filters/ProtanopiaProcessor.cs |  5 +-
 .../Processors/Filters/SaturateProcessor.cs   |  6 +-
 .../Processors/Filters/SepiaProcessor.cs      |  6 +-
 .../Filters/TritanomalyProcessor.cs           |  6 +-
 .../Processors/Filters/TritanopiaProcessor.cs |  6 +-
 .../Processing/Processors/IImageProcessor.cs  | 31 +++++++++-
 .../Processing/SaturateExtensions.cs          | 14 ++---
 src/ImageSharp/Processing/SepiaExtensions.cs  | 22 +++----
 37 files changed, 210 insertions(+), 239 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs

diff --git a/src/ImageSharp/Processing/BrightnessExtensions.cs b/src/ImageSharp/Processing/BrightnessExtensions.cs
index 2f252ad305..4de4dc897b 100644
--- a/src/ImageSharp/Processing/BrightnessExtensions.cs
+++ b/src/ImageSharp/Processing/BrightnessExtensions.cs
@@ -19,13 +19,11 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 will create an image that is completely black. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing brighter results.
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Brightness<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-           where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BrightnessProcessor<TPixel>(amount));
+        public static IImageProcessingContext Brightness(this IImageProcessingContext source, float amount)
+            => source.ApplyProcessor(new BrightnessProcessor(amount));
 
         /// <summary>
         /// Alters the brightness component of the image.
@@ -34,15 +32,13 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 will create an image that is completely black. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing brighter results.
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Brightness<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BrightnessProcessor<TPixel>(amount), rectangle);
+        public static IImageProcessingContext Brightness(this IImageProcessingContext source, float amount, Rectangle rectangle)
+            => source.ApplyProcessor(new BrightnessProcessor(amount), rectangle);
     }
 }
diff --git a/src/ImageSharp/Processing/ColorBlindnessExtensions.cs b/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
index 3316358954..000d47bd3e 100644
--- a/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
+++ b/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
@@ -16,49 +16,44 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies the given colorblindness simulator to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="colorBlindness">The type of color blindness simulator to apply.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> ColorBlindness<TPixel>(this IImageProcessingContext<TPixel> source, ColorBlindnessMode colorBlindness)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(GetProcessor<TPixel>(colorBlindness));
+        public static IImageProcessingContext ColorBlindness(this IImageProcessingContext source, ColorBlindnessMode colorBlindness)
+            => source.ApplyProcessor(GetProcessor(colorBlindness));
 
         /// <summary>
         /// Applies the given colorblindness simulator to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="colorBlindnessMode">The type of color blindness simulator to apply.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> ColorBlindness<TPixel>(this IImageProcessingContext<TPixel> source, ColorBlindnessMode colorBlindnessMode, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(GetProcessor<TPixel>(colorBlindnessMode), rectangle);
+        public static IImageProcessingContext ColorBlindness(this IImageProcessingContext source, ColorBlindnessMode colorBlindnessMode, Rectangle rectangle)
+            => source.ApplyProcessor(GetProcessor(colorBlindnessMode), rectangle);
 
-        private static IImageProcessor<TPixel> GetProcessor<TPixel>(ColorBlindnessMode colorBlindness)
-            where TPixel : struct, IPixel<TPixel>
+        private static IImageProcessor GetProcessor(ColorBlindnessMode colorBlindness)
         {
             switch (colorBlindness)
             {
                 case ColorBlindnessMode.Achromatomaly:
-                    return new AchromatomalyProcessor<TPixel>();
+                    return new AchromatomalyProcessor();
                 case ColorBlindnessMode.Achromatopsia:
-                    return new AchromatopsiaProcessor<TPixel>();
+                    return new AchromatopsiaProcessor();
                 case ColorBlindnessMode.Deuteranomaly:
-                    return new DeuteranomalyProcessor<TPixel>();
+                    return new DeuteranomalyProcessor();
                 case ColorBlindnessMode.Deuteranopia:
-                    return new DeuteranopiaProcessor<TPixel>();
+                    return new DeuteranopiaProcessor();
                 case ColorBlindnessMode.Protanomaly:
-                    return new ProtanomalyProcessor<TPixel>();
+                    return new ProtanomalyProcessor();
                 case ColorBlindnessMode.Protanopia:
-                    return new ProtanopiaProcessor<TPixel>();
+                    return new ProtanopiaProcessor();
                 case ColorBlindnessMode.Tritanomaly:
-                    return new TritanomalyProcessor<TPixel>();
+                    return new TritanomalyProcessor();
                 default:
-                    return new TritanopiaProcessor<TPixel>();
+                    return new TritanopiaProcessor();
             }
         }
     }
diff --git a/src/ImageSharp/Processing/ContrastExtensions.cs b/src/ImageSharp/Processing/ContrastExtensions.cs
index 776aa67518..b03844d93b 100644
--- a/src/ImageSharp/Processing/ContrastExtensions.cs
+++ b/src/ImageSharp/Processing/ContrastExtensions.cs
@@ -8,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the contrast component to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the alteration of the contrast component to the <see cref="Image"/> type.
     /// </summary>
     public static class ContrastExtensions
     {
@@ -19,13 +19,11 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 will create an image that is completely gray. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing results with more contrast.
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Contrast<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ContrastProcessor<TPixel>(amount));
+        public static IImageProcessingContext Contrast(this IImageProcessingContext source, float amount)
+            => source.ApplyProcessor(new ContrastProcessor(amount));
 
         /// <summary>
         /// Alters the contrast component of the image.
@@ -34,15 +32,13 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 will create an image that is completely gray. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of an amount over 1 are allowed, providing results with more contrast.
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Contrast<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ContrastProcessor<TPixel>(amount), rectangle);
+        public static IImageProcessingContext Contrast(this IImageProcessingContext source, float amount, Rectangle rectangle)
+            => source.ApplyProcessor(new ContrastProcessor(amount), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/GrayscaleExtensions.cs b/src/ImageSharp/Processing/GrayscaleExtensions.cs
index 9ab664056b..d68a385e47 100644
--- a/src/ImageSharp/Processing/GrayscaleExtensions.cs
+++ b/src/ImageSharp/Processing/GrayscaleExtensions.cs
@@ -9,56 +9,48 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of grayscale toning to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of grayscale toning to the <see cref="Image"/> type.
     /// </summary>
     public static class GrayscaleExtensions
     {
         /// <summary>
         /// Applies <see cref="GrayscaleMode.Bt709"/> grayscale toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source)
             => Grayscale(source, GrayscaleMode.Bt709);
 
         /// <summary>
         /// Applies <see cref="GrayscaleMode.Bt709"/> grayscale toning to the image using the given amount.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, float amount)
             => Grayscale(source, GrayscaleMode.Bt709, amount);
 
         /// <summary>
         /// Applies grayscale toning to the image with the given <see cref="GrayscaleMode"/>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="mode">The formula to apply to perform the operation.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, GrayscaleMode mode)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, GrayscaleMode mode)
             => Grayscale(source, mode, 1F);
 
         /// <summary>
         /// Applies grayscale toning to the image with the given <see cref="GrayscaleMode"/> using the given amount.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="mode">The formula to apply to perform the operation.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, GrayscaleMode mode, float amount)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, GrayscaleMode mode, float amount)
         {
-            IImageProcessor<TPixel> processor = mode == GrayscaleMode.Bt709
-               ? (IImageProcessor<TPixel>)new GrayscaleBt709Processor<TPixel>(amount)
-               : new GrayscaleBt601Processor<TPixel>(1F);
+            IImageProcessor processor = mode == GrayscaleMode.Bt709
+               ? (IImageProcessor)new GrayscaleBt709Processor(amount)
+               : new GrayscaleBt601Processor(1F);
 
             source.ApplyProcessor(processor);
             return source;
@@ -67,61 +59,53 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies <see cref="GrayscaleMode.Bt709"/> grayscale toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, Rectangle rectangle)
             => Grayscale(source, 1F, rectangle);
 
         /// <summary>
         /// Applies <see cref="GrayscaleMode.Bt709"/> grayscale toning to the image using the given amount.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => Grayscale(source, GrayscaleMode.Bt709, amount, rectangle);
 
         /// <summary>
         /// Applies grayscale toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="mode">The formula to apply to perform the operation.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, GrayscaleMode mode, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, GrayscaleMode mode, Rectangle rectangle)
             => Grayscale(source, mode, 1F, rectangle);
 
         /// <summary>
         /// Applies grayscale toning to the image using the given amount.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="mode">The formula to apply to perform the operation.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Grayscale<TPixel>(this IImageProcessingContext<TPixel> source, GrayscaleMode mode, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="IImageProcessingContext"/>.</returns>
+        public static IImageProcessingContext Grayscale(this IImageProcessingContext source, GrayscaleMode mode, float amount, Rectangle rectangle)
         {
-            IImageProcessor<TPixel> processor = mode == GrayscaleMode.Bt709
-                ? (IImageProcessor<TPixel>)new GrayscaleBt709Processor<TPixel>(amount)
-                : new GrayscaleBt601Processor<TPixel>(amount);
+            IImageProcessor processor = mode == GrayscaleMode.Bt709
+                ? (IImageProcessor)new GrayscaleBt709Processor(amount)
+                : new GrayscaleBt601Processor(amount);
 
             source.ApplyProcessor(processor, rectangle);
             return source;
diff --git a/src/ImageSharp/Processing/HueExtensions.cs b/src/ImageSharp/Processing/HueExtensions.cs
index 246d4bf2bd..17296e1db5 100644
--- a/src/ImageSharp/Processing/HueExtensions.cs
+++ b/src/ImageSharp/Processing/HueExtensions.cs
@@ -8,33 +8,29 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the hue component to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the alteration of the hue component to the <see cref="Image"/> type.
     /// </summary>
     public static class HueExtensions
     {
         /// <summary>
         /// Alters the hue component of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="degrees">The rotation angle in degrees to adjust the hue.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Hue<TPixel>(this IImageProcessingContext<TPixel> source, float degrees)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new HueProcessor<TPixel>(degrees));
+        public static IImageProcessingContext Hue(this IImageProcessingContext source, float degrees)
+            => source.ApplyProcessor(new HueProcessor(degrees));
 
         /// <summary>
         /// Alters the hue component of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="degrees">The rotation angle in degrees to adjust the hue.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Hue<TPixel>(this IImageProcessingContext<TPixel> source, float degrees, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new HueProcessor<TPixel>(degrees), rectangle);
+        public static IImageProcessingContext Hue(this IImageProcessingContext source, float degrees, Rectangle rectangle)
+            => source.ApplyProcessor(new HueProcessor(degrees), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/InvertExtensions.cs b/src/ImageSharp/Processing/InvertExtensions.cs
index 9e031bc95a..828aaa1bbc 100644
--- a/src/ImageSharp/Processing/InvertExtensions.cs
+++ b/src/ImageSharp/Processing/InvertExtensions.cs
@@ -8,31 +8,27 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the inversion of colors to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the inversion of colors to the <see cref="Image"/> type.
     /// </summary>
     public static class InvertExtensions
     {
         /// <summary>
         /// Inverts the colors of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Invert<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new InvertProcessor<TPixel>(1F));
+        public static IImageProcessingContext Invert(this IImageProcessingContext source)
+            => source.ApplyProcessor(new InvertProcessor(1F));
 
         /// <summary>
         /// Inverts the colors of the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Invert<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new InvertProcessor<TPixel>(1F), rectangle);
+        public static IImageProcessingContext Invert(this IImageProcessingContext source, Rectangle rectangle)
+            => source.ApplyProcessor(new InvertProcessor(1F), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/KodachromeExtensions.cs b/src/ImageSharp/Processing/KodachromeExtensions.cs
index e438b131ed..24bd51e016 100644
--- a/src/ImageSharp/Processing/KodachromeExtensions.cs
+++ b/src/ImageSharp/Processing/KodachromeExtensions.cs
@@ -8,31 +8,27 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Kodachrome camera effect to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the recreation of an old Kodachrome camera effect to the <see cref="Image"/> type.
     /// </summary>
     public static class KodachromeExtensions
     {
         /// <summary>
         /// Alters the colors of the image recreating an old Kodachrome camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Kodachrome<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new KodachromeProcessor<TPixel>());
+        public static IImageProcessingContext Kodachrome(this IImageProcessingContext source)
+            => source.ApplyProcessor(new KodachromeProcessor());
 
         /// <summary>
         /// Alters the colors of the image recreating an old Kodachrome camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Kodachrome<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new KodachromeProcessor<TPixel>(), rectangle);
+        public static IImageProcessingContext Kodachrome(this IImageProcessingContext source, Rectangle rectangle)
+            => source.ApplyProcessor(new KodachromeProcessor(), rectangle);
     }
 }
diff --git a/src/ImageSharp/Processing/LomographExtensions.cs b/src/ImageSharp/Processing/LomographExtensions.cs
index 7dff164026..a3fd3d3b50 100644
--- a/src/ImageSharp/Processing/LomographExtensions.cs
+++ b/src/ImageSharp/Processing/LomographExtensions.cs
@@ -8,31 +8,27 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Lomograph camera effect to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the recreation of an old Lomograph camera effect to the <see cref="Image"/> type.
     /// </summary>
     public static class LomographExtensions
     {
         /// <summary>
         /// Alters the colors of the image recreating an old Lomograph camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Lomograph<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new LomographProcessor<TPixel>());
+        public static IImageProcessingContext Lomograph(this IImageProcessingContext source)
+            => source.ApplyProcessor(new LomographProcessor());
 
         /// <summary>
         /// Alters the colors of the image recreating an old Lomograph camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Lomograph<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new LomographProcessor<TPixel>(), rectangle);
+        public static IImageProcessingContext Lomograph(this IImageProcessingContext source, Rectangle rectangle)
+            => source.ApplyProcessor(new LomographProcessor(), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/PolaroidExtensions.cs b/src/ImageSharp/Processing/PolaroidExtensions.cs
index 5d4beee221..4172c1d615 100644
--- a/src/ImageSharp/Processing/PolaroidExtensions.cs
+++ b/src/ImageSharp/Processing/PolaroidExtensions.cs
@@ -8,19 +8,17 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Polaroid camera effect to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the recreation of an old Polaroid camera effect to the <see cref="Image"/> type.
     /// </summary>
     public static class PolaroidExtensions
     {
         /// <summary>
         /// Alters the colors of the image recreating an old Polaroid camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Polaroid<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new PolaroidProcessor<TPixel>());
+        public static IImageProcessingContext Polaroid(this IImageProcessingContext source)
+            => source.ApplyProcessor(new PolaroidProcessor());
 
         /// <summary>
         /// Alters the colors of the image recreating an old Polaroid camera effect.
@@ -31,8 +29,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Polaroid<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new PolaroidProcessor<TPixel>(), rectangle);
+        public static IImageProcessingContext Polaroid(this IImageProcessingContext source, Rectangle rectangle)
+            => source.ApplyProcessor(new PolaroidProcessor(), rectangle);
     }
 }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index d2e9630dc0..c08a176618 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor<TPixel>(1F).Apply(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
             }
         }
     }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
index 73f92fae38..aa33699f5d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor<TPixel>(1F).Apply(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
index edc7ec4ccd..9ec79da9eb 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor<TPixel>(1F).Apply(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
index 57c1bad39b..2dac6b827d 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Achromatomaly (Color desensitivity) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AchromatomalyProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class AchromatomalyProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AchromatomalyProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AchromatomalyProcessor"/> class.
         /// </summary>
         public AchromatomalyProcessor()
             : base(KnownFilterMatrices.AchromatomalyFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
index 696a854ab8..4df94a7603 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Achromatopsia (Monochrome) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AchromatopsiaProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class AchromatopsiaProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AchromatopsiaProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AchromatopsiaProcessor"/> class.
         /// </summary>
         public AchromatopsiaProcessor()
             : base(KnownFilterMatrices.AchromatopsiaFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
index b1b8ad7478..6a1f3869ae 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a brightness filter matrix using the given amount.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BrightnessProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class BrightnessProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BrightnessProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BrightnessProcessor"/> class.
         /// </summary>
         /// <remarks>
         /// A value of <value>0</value> will create an image that is completely black. A value of <value>1</value> leaves the input unchanged.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
index ebec464d5c..3bea695b99 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a contrast filter matrix using the given amount.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ContrastProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class ContrastProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ContrastProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ContrastProcessor"/> class.
         /// </summary>
         /// <remarks>
         /// A value of <value>0</value> will create an image that is completely gray. A value of <value>1</value> leaves the input unchanged.
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
index 0d1b1da902..395489d563 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Deuteranomaly (Green-Weak) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class DeuteranomalyProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class DeuteranomalyProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="DeuteranomalyProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="DeuteranomalyProcessor"/> class.
         /// </summary>
         public DeuteranomalyProcessor()
             : base(KnownFilterMatrices.DeuteranomalyFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
index ae0727048e..51f8361e6c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Deuteranopia (Green-Blind) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class DeuteranopiaProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class DeuteranopiaProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="DeuteranopiaProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="DeuteranopiaProcessor"/> class.
         /// </summary>
         public DeuteranopiaProcessor()
             : base(KnownFilterMatrices.DeuteranopiaFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index 3f9f586877..5637e97700 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// </summary>
         public ColorMatrix Matrix { get; }
 
-        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        public virtual IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
             return new FilterProcessorImplementation<TPixel>(this);
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
index 1eaaf1ea5b..8fea81564c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
@@ -18,11 +18,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     internal class FilterProcessorImplementation<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly FilterProcessor paramterSource;
+        private readonly FilterProcessor definition;
 
-        public FilterProcessorImplementation(FilterProcessor paramterSource)
+        public FilterProcessorImplementation(FilterProcessor definition)
         {
-            this.paramterSource = paramterSource;
+            this.definition = definition;
         }
 
         /// <inheritdoc/>
@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
             var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
             int startX = interest.X;
 
-            ColorMatrix matrix = this.paramterSource.Matrix;
+            ColorMatrix matrix = this.definition.Matrix;
 
             ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
                 interest,
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
index c933d4858f..b39e01b9a8 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.601
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GrayscaleBt601Processor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class GrayscaleBt601Processor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="GrayscaleBt601Processor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GrayscaleBt601Processor"/> class.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         public GrayscaleBt601Processor(float amount)
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
index 1716773b4c..038a2885bc 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
@@ -2,18 +2,17 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.709
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GrayscaleBt709Processor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class GrayscaleBt709Processor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="GrayscaleBt709Processor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GrayscaleBt709Processor"/> class.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         public GrayscaleBt709Processor(float amount)
@@ -23,8 +22,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         }
 
         /// <summary>
-        /// Gets the proportion of the conversion
+        /// Gets the proportion of the conversion.
         /// </summary>
         public float Amount { get; }
+
+        // TODO: Move this to an appropriate extension method if possible.
+        internal void ApplyToFrame<TPixel>(ImageFrame<TPixel> frame, Rectangle sourceRectangle, Configuration configuration)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var processorImpl = new FilterProcessorImplementation<TPixel>(new GrayscaleBt709Processor(1F));
+            processorImpl.Apply(frame, sourceRectangle, configuration);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
index 4c3a0c73ed..a69fd50757 100644
--- a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
@@ -8,11 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a hue filter matrix using the given angle of rotation in degrees
     /// </summary>
-    internal class HueProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class HueProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="HueProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="HueProcessor"/> class.
         /// </summary>
         /// <param name="degrees">The angle of rotation in degrees</param>
         public HueProcessor(float degrees)
diff --git a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
index 462c420707..d7631970db 100644
--- a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a filter matrix that inverts the colors of an image
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class InvertProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class InvertProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="InvertProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="InvertProcessor"/> class.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         public InvertProcessor(float amount)
diff --git a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
index 003766e8ab..5570f23d7d 100644
--- a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a filter matrix recreating an old Kodachrome camera effect matrix to the image
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class KodachromeProcessor<TPixel> : FilterProcessor<TPixel>
-          where TPixel : struct, IPixel<TPixel>
+    internal class KodachromeProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="KodachromeProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="KodachromeProcessor"/> class.
         /// </summary>
         public KodachromeProcessor()
             : base(KnownFilterMatrices.KodachromeFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
index 737ebf6188..345d829ac6 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
@@ -1,33 +1,22 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Overlays;
-using SixLabors.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating an old Lomograph effect.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class LomographProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class LomographProcessor : FilterProcessor
     {
-        private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="LomographProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="LomographProcessor" /> class.
         /// </summary>
         public LomographProcessor()
             : base(KnownFilterMatrices.LomographFilter)
         {
         }
 
-        /// <inheritdoc/>
-        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            new VignetteProcessor<TPixel>(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
-        }
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
+            new LomographProcessorImplementation<TPixel>(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
new file mode 100644
index 0000000000..d851b98e06
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
@@ -0,0 +1,26 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Overlays;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Filters
+{
+    internal class LomographProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
+
+        /// <inheritdoc/>
+        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            new VignetteProcessor<TPixel>(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
+        }
+
+        public LomographProcessorImplementation(FilterProcessor definition)
+            : base(definition)
+        {
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
index fb065ac176..af16d9eab2 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
@@ -10,13 +10,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Polaroid effect.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class PolaroidProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class PolaroidProcessor : FilterProcessor
     {
-        private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
-        private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
-
         /// <summary>
         /// Initializes a new instance of the <see cref="PolaroidProcessor{TPixel}" /> class.
         /// </summary>
@@ -25,11 +20,26 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         {
         }
 
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
+            new PolaroidProcessorImplementation<TPixel>(this);
+    }
+
+    internal class PolaroidProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
+        private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
+
         /// <inheritdoc/>
         protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
             new VignetteProcessor<TPixel>(VeryDarkOrange).Apply(source, sourceRectangle, configuration);
             new GlowProcessor<TPixel>(LightOrange, source.Width / 4F).Apply(source, sourceRectangle, configuration);
         }
+
+        public PolaroidProcessorImplementation(FilterProcessor definition)
+            : base(definition)
+        {
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
index 79eb708518..95e369b371 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Protanomaly (Red-Weak) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ProtanomalyProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class ProtanomalyProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ProtanomalyProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ProtanomalyProcessor"/> class.
         /// </summary>
         public ProtanomalyProcessor()
             : base(KnownFilterMatrices.ProtanomalyFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
index c6a01439a2..94eeaae475 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
@@ -9,11 +9,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// Converts the colors of the image recreating Protanopia (Red-Blind) color blindness.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ProtanopiaProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class ProtanopiaProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ProtanopiaProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ProtanopiaProcessor"/> class.
         /// </summary>
         public ProtanopiaProcessor()
             : base(KnownFilterMatrices.ProtanopiaFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
index 75e956071e..424eeb461c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a saturation filter matrix using the given amount.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class SaturateProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class SaturateProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="SaturateProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SaturateProcessor"/> class.
         /// </summary>
         /// <remarks>
         /// A value of <value>0</value> is completely un-saturated. A value of <value>1</value> leaves the input unchanged.
diff --git a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
index 2009dccd56..538db4b52c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a sepia filter matrix using the given amount.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class SepiaProcessor<TPixel> : FilterProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class SepiaProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="SepiaProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SepiaProcessor"/> class.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         public SepiaProcessor(float amount)
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
index 593f7f5b01..3eda05a115 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Tritanomaly (Blue-Weak) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class TritanomalyProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class TritanomalyProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="TritanomalyProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="TritanomalyProcessor"/> class.
         /// </summary>
         public TritanomalyProcessor()
             : base(KnownFilterMatrices.TritanomalyFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
index 153ad5559a..f5ed26c833 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
@@ -8,12 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Tritanopia (Blue-Blind) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class TritanopiaProcessor<TPixel> : FilterProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class TritanopiaProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="TritanopiaProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="TritanopiaProcessor"/> class.
         /// </summary>
         public TritanopiaProcessor()
             : base(KnownFilterMatrices.TritanopiaFilter)
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor.cs b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
index 78800affbc..68db453806 100644
--- a/src/ImageSharp/Processing/Processors/IImageProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors
         IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>;
     }
-    
+
     /// <summary>
     /// Encapsulates methods to alter the pixels of an image.
     /// </summary>
@@ -34,4 +34,33 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// </exception>
         void Apply(Image<TPixel> source, Rectangle sourceRectangle);
     }
+
+    internal static class ImageProcessorExtensions
+    {
+        public static void Apply(this IImageProcessor processor, Image source, Rectangle sourceRectangle)
+        {
+            var visitor = new ApplyVisitor(processor, sourceRectangle);
+            source.AcceptVisitor(visitor);
+        }
+
+        private class ApplyVisitor : IImageVisitor
+        {
+            private readonly IImageProcessor processor;
+
+            private readonly Rectangle sourceRectangle;
+
+            public ApplyVisitor(IImageProcessor processor, Rectangle sourceRectangle)
+            {
+                this.processor = processor;
+                this.sourceRectangle = sourceRectangle;
+            }
+
+            public void Visit<TPixel>(Image<TPixel> image)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                var processorImpl = processor.CreatePixelSpecificProcessor<TPixel>();
+                processorImpl.Apply(image, this.sourceRectangle);
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/SaturateExtensions.cs b/src/ImageSharp/Processing/SaturateExtensions.cs
index ba45ae12c9..fe2cf5f348 100644
--- a/src/ImageSharp/Processing/SaturateExtensions.cs
+++ b/src/ImageSharp/Processing/SaturateExtensions.cs
@@ -8,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the saturation component to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the alteration of the saturation component to the <see cref="Image"/> type.
     /// </summary>
     public static class SaturateExtensions
     {
@@ -19,13 +19,11 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 is completely un-saturated. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of amount over 1 are allowed, providing super-saturated results
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Saturate<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new SaturateProcessor<TPixel>(amount));
+        public static IImageProcessingContext Saturate(this IImageProcessingContext source, float amount)
+            => source.ApplyProcessor(new SaturateProcessor(amount));
 
         /// <summary>
         /// Alters the saturation component of the image.
@@ -34,15 +32,13 @@ namespace SixLabors.ImageSharp.Processing
         /// A value of 0 is completely un-saturated. A value of 1 leaves the input unchanged.
         /// Other values are linear multipliers on the effect. Values of amount over 1 are allowed, providing super-saturated results
         /// </remarks>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Saturate<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new SaturateProcessor<TPixel>(amount), rectangle);
+        public static IImageProcessingContext Saturate(this IImageProcessingContext source, float amount, Rectangle rectangle)
+            => source.ApplyProcessor(new SaturateProcessor(amount), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/SepiaExtensions.cs b/src/ImageSharp/Processing/SepiaExtensions.cs
index 08676ee62a..5b23ec11af 100644
--- a/src/ImageSharp/Processing/SepiaExtensions.cs
+++ b/src/ImageSharp/Processing/SepiaExtensions.cs
@@ -8,56 +8,48 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of sepia toning to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of sepia toning to the <see cref="Image"/> type.
     /// </summary>
     public static class SepiaExtensions
     {
         /// <summary>
         /// Applies sepia toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Sepia<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Sepia(this IImageProcessingContext source)
              => Sepia(source, 1F);
 
         /// <summary>
         /// Applies sepia toning to the image using the given amount.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Sepia<TPixel>(this IImageProcessingContext<TPixel> source, float amount)
-            where TPixel : struct, IPixel<TPixel>
-             => source.ApplyProcessor(new SepiaProcessor<TPixel>(amount));
+        public static IImageProcessingContext Sepia(this IImageProcessingContext source, float amount)
+             => source.ApplyProcessor(new SepiaProcessor(amount));
 
         /// <summary>
         /// Applies sepia toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Sepia<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Sepia(this IImageProcessingContext source, Rectangle rectangle)
             => Sepia(source, 1F, rectangle);
 
         /// <summary>
         /// Applies sepia toning to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Sepia<TPixel>(this IImageProcessingContext<TPixel> source, float amount, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new SepiaProcessor<TPixel>(amount), rectangle);
+        public static IImageProcessingContext Sepia(this IImageProcessingContext source, float amount, Rectangle rectangle)
+            => source.ApplyProcessor(new SepiaProcessor(amount), rectangle);
     }
 }
\ No newline at end of file

From 59845dcbd7d64756c6b9dc9ae81edf3dbf09fc6b Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 01:08:48 +0200
Subject: [PATCH 107/223] reached a fully compiling state

---
 .../ImageSharp.Drawing.csproj                 |  4 +-
 .../Formats/Gif/GifEncoderTests.cs            |  6 +--
 .../Formats/Jpg/JpegDecoderTests.cs           |  4 +-
 .../ImageSharp.Tests/ImageSharp.Tests.csproj  |  3 +-
 .../Processing/Filters/BlackWhiteTest.cs      | 27 -----------
 .../Processing/Filters/BrightnessTest.cs      | 31 ------------
 .../Processing/Filters/ColorBlindnessTest.cs  | 46 ------------------
 .../Processing/Filters/ContrastTest.cs        | 33 -------------
 .../Processing/Filters/FilterTest.cs          |  4 +-
 .../Processing/Filters/GrayscaleTest.cs       | 47 -------------------
 .../Processing/Filters/HueTest.cs             | 32 -------------
 .../Processing/Filters/InvertTest.cs          | 27 -----------
 .../Processing/Filters/KodachromeTest.cs      | 27 -----------
 .../Processing/Filters/LomographTest.cs       | 31 ------------
 .../Processing/Filters/OpacityTest.cs         | 31 ------------
 .../Processing/Filters/PolaroidTest.cs        | 28 -----------
 .../Processing/Filters/SaturateTest.cs        | 31 ------------
 .../Processing/Filters/SepiaTest.cs           | 27 -----------
 .../Processing/Transforms/PadTest.cs          |  2 +-
 .../Processing/Transforms/ResizeTests.cs      |  8 ++--
 20 files changed, 17 insertions(+), 432 deletions(-)
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 6f5cabb09b..1734c48de2 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -10,7 +10,9 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+    
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
index cac4030d5f..5da1c3bb78 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             // Compare encoded result
             string path = provider.Utility.GetTestOutputFileName("gif", null, true);
-            using (var encoded = Image.Load(path))
+            using (var encoded = Image.Load<Rgba32>(path))
             {
                 encoded.CompareToReferenceOutput(ValidatorComparer, provider, null, "gif");
             }
@@ -180,7 +180,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
             {
                 inStream.Position = 0;
 
-                var image = Image.Load(inStream);
+                var image = Image.Load<Rgba32>(inStream);
                 GifMetadata metaData = image.Metadata.GetFormatMetadata(GifFormat.Instance);
                 GifFrameMetadata frameMetaData = image.Frames.RootFrame.Metadata.GetFormatMetadata(GifFormat.Instance);
                 GifColorTableMode colorMode = metaData.ColorTableMode;
@@ -194,7 +194,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
                 outStream.Position = 0;
 
                 outStream.Position = 0;
-                var clone = Image.Load(outStream);
+                var clone = Image.Load<Rgba32>(outStream);
 
                 GifMetadata cloneMetaData = clone.Metadata.GetFormatMetadata<GifMetadata>(GifFormat.Instance);
                 Assert.Equal(metaData.ColorTableMode, cloneMetaData.ColorTableMode);
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.cs
index 15f7f92a83..e316fe67eb 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.cs
@@ -147,8 +147,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             var comparer = ImageComparer.Tolerant(0, 0);
 
             using (Image<TPixel> expectedImage = provider.GetReferenceOutputImage<TPixel>(appendPixelTypeToFileName: false))
-            using (var pdfJsOriginalResult = Image.Load(pdfJsOriginalResultPath))
-            using (var pdfJsPortResult = Image.Load(sourceBytes, JpegDecoder))
+            using (var pdfJsOriginalResult = Image.Load<Rgba32>(pdfJsOriginalResultPath))
+            using (var pdfJsPortResult = Image.Load<Rgba32>(sourceBytes, JpegDecoder))
             {
                 ImageSimilarityReport originalReport = comparer.CompareImagesOrFrames(expectedImage, pdfJsOriginalResult);
                 ImageSimilarityReport portReport = comparer.CompareImagesOrFrames(expectedImage, pdfJsPortResult);
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 0b727f30ce..efdf89964c 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>
diff --git a/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs b/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
deleted file mode 100644
index d651f2f04e..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class BlackWhiteTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void BlackWhite_CorrectProcessor()
-        {
-            this.operations.BlackWhite();
-            BlackWhiteProcessor<Rgba32> p = this.Verify<BlackWhiteProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void BlackWhite_rect_CorrectProcessor()
-        {
-            this.operations.BlackWhite(this.rect);
-            BlackWhiteProcessor<Rgba32> p = this.Verify<BlackWhiteProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs b/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
deleted file mode 100644
index e210450a8c..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Effects
-{
-    public class BrightnessTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Brightness_amount_BrightnessProcessorDefaultsSet()
-        {
-            this.operations.Brightness(1.5F);
-            BrightnessProcessor<Rgba32> processor = this.Verify<BrightnessProcessor<Rgba32>>();
-
-            Assert.Equal(1.5F, processor.Amount);
-        }
-
-        [Fact]
-        public void Brightness_amount_rect_BrightnessProcessorDefaultsSet()
-        {
-            this.operations.Brightness(1.5F, this.rect);
-            BrightnessProcessor<Rgba32> processor = this.Verify<BrightnessProcessor<Rgba32>>(this.rect);
-
-            Assert.Equal(1.5F, processor.Amount);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs b/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
deleted file mode 100644
index aeafe5fe1d..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Collections.Generic;
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.ImageSharp.Tests.TestUtilities;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class ColorBlindnessTest : BaseImageOperationsExtensionTest
-    {
-        public static IEnumerable<object[]> TheoryData = new[] {
-            new object[]{ new TestType<AchromatomalyProcessor<Rgba32>>(), ColorBlindnessMode.Achromatomaly },
-            new object[]{ new TestType<AchromatopsiaProcessor<Rgba32>>(), ColorBlindnessMode.Achromatopsia },
-            new object[]{ new TestType<DeuteranomalyProcessor<Rgba32>>(), ColorBlindnessMode.Deuteranomaly },
-            new object[]{ new TestType<DeuteranopiaProcessor<Rgba32>>(), ColorBlindnessMode.Deuteranopia },
-            new object[]{ new TestType<ProtanomalyProcessor<Rgba32>>(), ColorBlindnessMode.Protanomaly },
-            new object[]{ new TestType<ProtanopiaProcessor<Rgba32>>(), ColorBlindnessMode.Protanopia },
-            new object[]{ new TestType<TritanomalyProcessor<Rgba32>>(), ColorBlindnessMode.Tritanomaly },
-            new object[]{ new TestType<TritanopiaProcessor<Rgba32>>(), ColorBlindnessMode.Tritanopia }
-        };
-
-        [Theory]
-        [MemberData(nameof(TheoryData))]
-        public void ColorBlindness_CorrectProcessor<T>(TestType<T> testType, ColorBlindnessMode colorBlindness)
-            where T : IImageProcessor<Rgba32>
-        {
-            this.operations.ColorBlindness(colorBlindness);
-            T p = this.Verify<T>();
-        }
-        [Theory]
-        [MemberData(nameof(TheoryData))]
-        public void ColorBlindness_rect_CorrectProcessor<T>(TestType<T> testType, ColorBlindnessMode colorBlindness)
-            where T : IImageProcessor<Rgba32>
-        {
-            this.operations.ColorBlindness(colorBlindness, this.rect);
-            T p = this.Verify<T>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs b/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
deleted file mode 100644
index 21a552e6af..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Effects
-{
-    using SixLabors.ImageSharp.Processing;
-    using SixLabors.ImageSharp.Processing.Processors.Filters;
-
-    public class ContrastTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Contrast_amount_ContrastProcessorDefaultsSet()
-        {
-            this.operations.Contrast(1.5F);
-            ContrastProcessor<Rgba32> processor = this.Verify<ContrastProcessor<Rgba32>>();
-
-            Assert.Equal(1.5F, processor.Amount);
-        }
-
-        [Fact]
-        public void Contrast_amount_rect_ContrastProcessorDefaultsSet()
-        {
-            this.operations.Contrast(1.5F, this.rect);
-            ContrastProcessor<Rgba32> processor = this.Verify<ContrastProcessor<Rgba32>>(this.rect);
-
-            Assert.Equal(1.5F, processor.Amount);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs b/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
index 414a0d74e4..f4efb12748 100644
--- a/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
@@ -17,14 +17,14 @@ namespace SixLabors.ImageSharp.Tests.Processing.Filters
         public void Filter_CorrectProcessor()
         {
             this.operations.Filter(KnownFilterMatrices.AchromatomalyFilter * KnownFilterMatrices.CreateHueFilter(90F));
-            FilterProcessor<Rgba32> p = this.Verify<FilterProcessor<Rgba32>>();
+            FilterProcessorImplementation<Rgba32> p = this.Verify<FilterProcessorImplementation<Rgba32>>();
         }
 
         [Fact]
         public void Filter_rect_CorrectProcessor()
         {
             this.operations.Filter(KnownFilterMatrices.AchromatomalyFilter * KnownFilterMatrices.CreateHueFilter(90F), this.rect);
-            FilterProcessor<Rgba32> p = this.Verify<FilterProcessor<Rgba32>>(this.rect);
+            FilterProcessorImplementation<Rgba32> p = this.Verify<FilterProcessorImplementation<Rgba32>>(this.rect);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs b/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
deleted file mode 100644
index d63d978207..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Collections.Generic;
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.ImageSharp.Tests.TestUtilities;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class GrayscaleTest : BaseImageOperationsExtensionTest
-    {
-        public static IEnumerable<object[]> ModeTheoryData = new[] {
-            new object[]{ new TestType<GrayscaleBt709Processor<Rgba32>>(), GrayscaleMode.Bt709 }
-        };
-
-        [Theory]
-        [MemberData(nameof(ModeTheoryData))]
-        public void Grayscale_mode_CorrectProcessor<T>(TestType<T> testType, GrayscaleMode mode)
-            where T : IImageProcessor<Rgba32>
-        {
-            this.operations.Grayscale(mode);
-            var p = this.Verify<T>();
-        }
-
-        [Theory]
-        [MemberData(nameof(ModeTheoryData))]
-        public void Grayscale_mode_rect_CorrectProcessor<T>(TestType<T> testType, GrayscaleMode mode)
-            where T : IImageProcessor<Rgba32>
-        {
-            this.operations.Grayscale(mode, this.rect);
-            this.Verify<T>(this.rect);
-        }
-
-        [Fact]
-        public void Grayscale_rect_CorrectProcessor()
-        {
-            this.operations.Grayscale(this.rect);
-            this.Verify<GrayscaleBt709Processor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs b/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
deleted file mode 100644
index f56578dd68..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class HueTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Hue_amount_HueProcessorDefaultsSet()
-        {
-            this.operations.Hue(34f);
-            var processor = this.Verify<HueProcessor<Rgba32>>();
-
-            Assert.Equal(34f, processor.Degrees);
-        }
-
-        [Fact]
-        public void Hue_amount_rect_HueProcessorDefaultsSet()
-        {
-            this.operations.Hue(5f, this.rect);
-            var processor = this.Verify<HueProcessor<Rgba32>>(this.rect);
-
-            Assert.Equal(5f, processor.Degrees);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs b/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
deleted file mode 100644
index c93afc9427..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Effects
-{
-    public class InvertTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Invert_InvertProcessorDefaultsSet()
-        {
-            this.operations.Invert();
-            var processor = this.Verify<InvertProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void Pixelate_rect_PixelateProcessorDefaultsSet()
-        {
-            this.operations.Invert(this.rect);
-            var processor = this.Verify<InvertProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs b/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
deleted file mode 100644
index a982521404..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class KodachromeTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Kodachrome_amount_KodachromeProcessorDefaultsSet()
-        {
-            this.operations.Kodachrome();
-            var processor = this.Verify<KodachromeProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void Kodachrome_amount_rect_KodachromeProcessorDefaultsSet()
-        {
-            this.operations.Kodachrome(this.rect);
-            var processor = this.Verify<KodachromeProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs b/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
deleted file mode 100644
index c104f8c252..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.IO;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.Primitives;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    using SixLabors.ImageSharp.Processing;
-    using SixLabors.ImageSharp.Processing.Processors.Filters;
-
-    public class LomographTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Lomograph_amount_LomographProcessorDefaultsSet()
-        {
-            this.operations.Lomograph();
-            var processor = this.Verify<LomographProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void Lomograph_amount_rect_LomographProcessorDefaultsSet()
-        {
-            this.operations.Lomograph(this.rect);
-            var processor = this.Verify<LomographProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs b/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
deleted file mode 100644
index adbb8cf295..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Effects
-{
-    public class OpacityTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Alpha_amount_AlphaProcessorDefaultsSet()
-        {
-            this.operations.Opacity(0.2f);
-            OpacityProcessor<Rgba32> processor = this.Verify<OpacityProcessor<Rgba32>>();
-
-            Assert.Equal(.2f, processor.Amount);
-        }
-
-        [Fact]
-        public void Alpha_amount_rect_AlphaProcessorDefaultsSet()
-        {
-            this.operations.Opacity(0.6f, this.rect);
-            OpacityProcessor<Rgba32> processor = this.Verify<OpacityProcessor<Rgba32>>(this.rect);
-
-            Assert.Equal(.6f, processor.Amount);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs b/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
deleted file mode 100644
index f28827b716..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class PolaroidTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Polaroid_amount_PolaroidProcessorDefaultsSet()
-        {
-            this.operations.Polaroid();
-            var processor = this.Verify<PolaroidProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void Polaroid_amount_rect_PolaroidProcessorDefaultsSet()
-        {
-            this.operations.Polaroid(this.rect);
-            var processor = this.Verify<PolaroidProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs b/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
deleted file mode 100644
index 4b8e80881c..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class SaturateTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Saturation_amount_SaturationProcessorDefaultsSet()
-        {
-            this.operations.Saturate(34);
-            SaturateProcessor<Rgba32> processor = this.Verify<SaturateProcessor<Rgba32>>();
-
-            Assert.Equal(34, processor.Amount);
-        }
-
-        [Fact]
-        public void Saturation_amount_rect_SaturationProcessorDefaultsSet()
-        {
-            this.operations.Saturate(5, this.rect);
-            SaturateProcessor<Rgba32> processor = this.Verify<SaturateProcessor<Rgba32>>(this.rect);
-
-            Assert.Equal(5, processor.Amount);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs b/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs
deleted file mode 100644
index 9351c8443f..0000000000
--- a/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Filters
-{
-    public class SepiaTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Sepia_amount_SepiaProcessorDefaultsSet()
-        {
-            this.operations.Sepia();
-            var processor = this.Verify<SepiaProcessor<Rgba32>>();
-        }
-
-        [Fact]
-        public void Sepia_amount_rect_SepiaProcessorDefaultsSet()
-        {
-            this.operations.Sepia(this.rect);
-            var processor = this.Verify<SepiaProcessor<Rgba32>>(this.rect);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
index 82d7682558..eca1a458b1 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             IResampler sampler = KnownResamplers.NearestNeighbor;
 
             this.operations.Pad(width, height);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
index 948c79d8dd..01c43a0a45 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             int width = 50;
             int height = 100;
             this.operations.Resize(width, height);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             int height = 100;
             IResampler sampler = KnownResamplers.Lanczos3;
             this.operations.Resize(width, height, sampler);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
 
             // ReSharper disable once ConditionIsAlwaysTrueOrFalse
             this.operations.Resize(width, height, sampler, compand);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             };
 
             this.operations.Resize(resizeOptions);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);

From 475cf843bbfe04cfbd54db3cadd9d80f98ff9a3d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 01:21:06 +0200
Subject: [PATCH 108/223] fix processor invocation tests

---
 .../BaseImageOperationsExtensionTest.cs       | 16 ++++++++++++--
 .../FakeImageOperationsProvider.cs            | 21 ++++++++++++++-----
 tests/ImageSharp.Tests/ImageOperationTests.cs | 14 ++++++-------
 .../Processing/Filters/FilterTest.cs          |  4 ++--
 .../Processing/Transforms/ResizeTests.cs      |  8 +++----
 5 files changed, 43 insertions(+), 20 deletions(-)

diff --git a/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs b/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
index 7adbefb346..857c19d87f 100644
--- a/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
+++ b/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
@@ -3,6 +3,7 @@
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.Primitives;
 using Xunit;
 
@@ -33,7 +34,12 @@ namespace SixLabors.ImageSharp.Tests
 
             FakeImageOperationsProvider.FakeImageOperations<Rgba32>.AppliedOperation operation = this.internalOperations.Applied[index];
 
-            return Assert.IsType<T>(operation.Processor);
+            if (operation.NonGenericProcessor != null)
+            {
+                return Assert.IsType<T>(operation.NonGenericProcessor);
+            }
+            
+            return Assert.IsType<T>(operation.GenericProcessor);
         }
 
         public T Verify<T>(Rectangle rect, int index = 0)
@@ -43,7 +49,13 @@ namespace SixLabors.ImageSharp.Tests
             FakeImageOperationsProvider.FakeImageOperations<Rgba32>.AppliedOperation operation = this.internalOperations.Applied[index];
 
             Assert.Equal(rect, operation.Rectangle);
-            return Assert.IsType<T>(operation.Processor);
+            
+            if (operation.NonGenericProcessor != null)
+            {
+                return Assert.IsType<T>(operation.NonGenericProcessor);
+            }
+            
+            return Assert.IsType<T>(operation.GenericProcessor);
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
index 276cc5da85..c91cb16d46 100644
--- a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
+++ b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
@@ -69,19 +69,28 @@ namespace SixLabors.ImageSharp.Tests
 
             public IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle)
             {
-                throw new System.NotImplementedException();
+                this.Applied.Add(new AppliedOperation()
+                                     {
+                                         Rectangle = rectangle,
+                                         NonGenericProcessor = processor
+                                     });
+                return this;
             }
 
             public IImageProcessingContext ApplyProcessor(IImageProcessor processor)
             {
-                throw new System.NotImplementedException();
+                this.Applied.Add(new AppliedOperation()
+                                     {
+                                         NonGenericProcessor = processor
+                                     });
+                return this;
             }
 
             public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
             {
                 this.Applied.Add(new AppliedOperation
                 {
-                    Processor = processor,
+                    GenericProcessor = processor,
                     Rectangle = rectangle
                 });
                 return this;
@@ -91,7 +100,7 @@ namespace SixLabors.ImageSharp.Tests
             {
                 this.Applied.Add(new AppliedOperation
                 {
-                    Processor = processor
+                    GenericProcessor = processor
                 });
                 return this;
             }
@@ -99,7 +108,9 @@ namespace SixLabors.ImageSharp.Tests
             public struct AppliedOperation
             {
                 public Rectangle? Rectangle { get; set; }
-                public IImageProcessor<TPixel> Processor { get; set; }
+                public IImageProcessor<TPixel> GenericProcessor { get; set; }
+                
+                public IImageProcessor NonGenericProcessor { get; set; }
             }
         }
     }
diff --git a/tests/ImageSharp.Tests/ImageOperationTests.cs b/tests/ImageSharp.Tests/ImageOperationTests.cs
index 869882f672..e694f0b644 100644
--- a/tests/ImageSharp.Tests/ImageOperationTests.cs
+++ b/tests/ImageSharp.Tests/ImageOperationTests.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Tests
             this.image.Mutate(x => x.ApplyProcessor(this.processor));
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.Processor));
+            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Tests
             this.image.Mutate(this.processor);
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.Processor));
+            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.Tests
             Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processor));
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.Processor));
+            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp.Tests
             Image<Rgba32> returned = this.image.Clone(this.processor);
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.Processor));
+            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processor));
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.Processor));
+            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -84,7 +84,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> returned = this.image.Clone(this.processor);
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.Processor));
+            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
@@ -92,7 +92,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             var operations = new FakeImageOperationsProvider.FakeImageOperations<Rgba32>(null, false);
             operations.ApplyProcessors(this.processor);
-            Assert.Contains(this.processor, operations.Applied.Select(x => x.Processor));
+            Assert.Contains(this.processor, operations.Applied.Select(x => x.GenericProcessor));
         }
 
         public void Dispose() => this.image.Dispose();
diff --git a/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs b/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
index f4efb12748..d598f0ac88 100644
--- a/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Filters/FilterTest.cs
@@ -17,14 +17,14 @@ namespace SixLabors.ImageSharp.Tests.Processing.Filters
         public void Filter_CorrectProcessor()
         {
             this.operations.Filter(KnownFilterMatrices.AchromatomalyFilter * KnownFilterMatrices.CreateHueFilter(90F));
-            FilterProcessorImplementation<Rgba32> p = this.Verify<FilterProcessorImplementation<Rgba32>>();
+            FilterProcessor p = this.Verify<FilterProcessor>();
         }
 
         [Fact]
         public void Filter_rect_CorrectProcessor()
         {
             this.operations.Filter(KnownFilterMatrices.AchromatomalyFilter * KnownFilterMatrices.CreateHueFilter(90F), this.rect);
-            FilterProcessorImplementation<Rgba32> p = this.Verify<FilterProcessorImplementation<Rgba32>>(this.rect);
+            FilterProcessor p = this.Verify<FilterProcessor>(this.rect);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
index 01c43a0a45..570ac4e2cd 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/ResizeTests.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             int width = 50;
             int height = 100;
             this.operations.Resize(width, height);
-            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
+            ResizeProcessor resizeProcessor = this.Verify<ResizeProcessor>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             int height = 100;
             IResampler sampler = KnownResamplers.Lanczos3;
             this.operations.Resize(width, height, sampler);
-            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
+            ResizeProcessor resizeProcessor = this.Verify<ResizeProcessor>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
 
             // ReSharper disable once ConditionIsAlwaysTrueOrFalse
             this.operations.Resize(width, height, sampler, compand);
-            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
+            ResizeProcessor resizeProcessor = this.Verify<ResizeProcessor>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             };
 
             this.operations.Resize(resizeOptions);
-            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
+            ResizeProcessor resizeProcessor = this.Verify<ResizeProcessor>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);

From 134d4845e237d1864a56b0b77c13ecc1a66e5a3f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 01:26:10 +0200
Subject: [PATCH 109/223] re-add and fix filter invocation tests

---
 .../Processing/Filters/BlackWhiteTest.cs      | 27 +++++++++++
 .../Processing/Filters/BrightnessTest.cs      | 31 ++++++++++++
 .../Processing/Filters/ColorBlindnessTest.cs  | 46 ++++++++++++++++++
 .../Processing/Filters/ContrastTest.cs        | 33 +++++++++++++
 .../Processing/Filters/GrayscaleTest.cs       | 47 +++++++++++++++++++
 .../Processing/Filters/HueTest.cs             | 32 +++++++++++++
 .../Processing/Filters/InvertTest.cs          | 27 +++++++++++
 .../Processing/Filters/KodachromeTest.cs      | 27 +++++++++++
 .../Processing/Filters/LomographTest.cs       | 31 ++++++++++++
 .../Processing/Filters/OpacityTest.cs         | 31 ++++++++++++
 .../Processing/Filters/PolaroidTest.cs        | 28 +++++++++++
 .../Processing/Filters/SaturateTest.cs        | 31 ++++++++++++
 .../Processing/Filters/SepiaTest.cs           | 27 +++++++++++
 13 files changed, 418 insertions(+)
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs

diff --git a/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs b/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
new file mode 100644
index 0000000000..f913068e35
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/BlackWhiteTest.cs
@@ -0,0 +1,27 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class BlackWhiteTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void BlackWhite_CorrectProcessor()
+        {
+            this.operations.BlackWhite();
+            BlackWhiteProcessor p = this.Verify<BlackWhiteProcessor>();
+        }
+
+        [Fact]
+        public void BlackWhite_rect_CorrectProcessor()
+        {
+            this.operations.BlackWhite(this.rect);
+            BlackWhiteProcessor p = this.Verify<BlackWhiteProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs b/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
new file mode 100644
index 0000000000..c26524880a
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/BrightnessTest.cs
@@ -0,0 +1,31 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Effects
+{
+    public class BrightnessTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Brightness_amount_BrightnessProcessorDefaultsSet()
+        {
+            this.operations.Brightness(1.5F);
+            BrightnessProcessor processor = this.Verify<BrightnessProcessor>();
+
+            Assert.Equal(1.5F, processor.Amount);
+        }
+
+        [Fact]
+        public void Brightness_amount_rect_BrightnessProcessorDefaultsSet()
+        {
+            this.operations.Brightness(1.5F, this.rect);
+            BrightnessProcessor processor = this.Verify<BrightnessProcessor>(this.rect);
+
+            Assert.Equal(1.5F, processor.Amount);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs b/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
new file mode 100644
index 0000000000..7dd894403d
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/ColorBlindnessTest.cs
@@ -0,0 +1,46 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Collections.Generic;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using SixLabors.ImageSharp.Processing.Processors;
+using SixLabors.ImageSharp.Tests.TestUtilities;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class ColorBlindnessTest : BaseImageOperationsExtensionTest
+    {
+        public static IEnumerable<object[]> TheoryData = new[] {
+            new object[]{ new TestType<AchromatomalyProcessor>(), ColorBlindnessMode.Achromatomaly },
+            new object[]{ new TestType<AchromatopsiaProcessor>(), ColorBlindnessMode.Achromatopsia },
+            new object[]{ new TestType<DeuteranomalyProcessor>(), ColorBlindnessMode.Deuteranomaly },
+            new object[]{ new TestType<DeuteranopiaProcessor>(), ColorBlindnessMode.Deuteranopia },
+            new object[]{ new TestType<ProtanomalyProcessor>(), ColorBlindnessMode.Protanomaly },
+            new object[]{ new TestType<ProtanopiaProcessor>(), ColorBlindnessMode.Protanopia },
+            new object[]{ new TestType<TritanomalyProcessor>(), ColorBlindnessMode.Tritanomaly },
+            new object[]{ new TestType<TritanopiaProcessor>(), ColorBlindnessMode.Tritanopia }
+        };
+
+        [Theory]
+        [MemberData(nameof(TheoryData))]
+        public void ColorBlindness_CorrectProcessor<T>(TestType<T> testType, ColorBlindnessMode colorBlindness)
+            where T : IImageProcessor
+        {
+            this.operations.ColorBlindness(colorBlindness);
+            T p = this.Verify<T>();
+        }
+        [Theory]
+        [MemberData(nameof(TheoryData))]
+        public void ColorBlindness_rect_CorrectProcessor<T>(TestType<T> testType, ColorBlindnessMode colorBlindness)
+            where T : IImageProcessor
+        {
+            this.operations.ColorBlindness(colorBlindness, this.rect);
+            T p = this.Verify<T>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs b/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
new file mode 100644
index 0000000000..ff2b1c702d
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/ContrastTest.cs
@@ -0,0 +1,33 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Effects
+{
+    using SixLabors.ImageSharp.Processing;
+    using SixLabors.ImageSharp.Processing.Processors.Filters;
+
+    public class ContrastTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Contrast_amount_ContrastProcessorDefaultsSet()
+        {
+            this.operations.Contrast(1.5F);
+            ContrastProcessor processor = this.Verify<ContrastProcessor>();
+
+            Assert.Equal(1.5F, processor.Amount);
+        }
+
+        [Fact]
+        public void Contrast_amount_rect_ContrastProcessorDefaultsSet()
+        {
+            this.operations.Contrast(1.5F, this.rect);
+            ContrastProcessor processor = this.Verify<ContrastProcessor>(this.rect);
+
+            Assert.Equal(1.5F, processor.Amount);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs b/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
new file mode 100644
index 0000000000..94e1b00a71
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/GrayscaleTest.cs
@@ -0,0 +1,47 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Collections.Generic;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using SixLabors.ImageSharp.Processing.Processors;
+using SixLabors.ImageSharp.Tests.TestUtilities;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class GrayscaleTest : BaseImageOperationsExtensionTest
+    {
+        public static IEnumerable<object[]> ModeTheoryData = new[] {
+            new object[]{ new TestType<GrayscaleBt709Processor>(), GrayscaleMode.Bt709 }
+        };
+
+        [Theory]
+        [MemberData(nameof(ModeTheoryData))]
+        public void Grayscale_mode_CorrectProcessor<T>(TestType<T> testType, GrayscaleMode mode)
+            where T : IImageProcessor
+        {
+            this.operations.Grayscale(mode);
+            var p = this.Verify<T>();
+        }
+
+        [Theory]
+        [MemberData(nameof(ModeTheoryData))]
+        public void Grayscale_mode_rect_CorrectProcessor<T>(TestType<T> testType, GrayscaleMode mode)
+            where T : IImageProcessor
+        {
+            this.operations.Grayscale(mode, this.rect);
+            this.Verify<T>(this.rect);
+        }
+
+        [Fact]
+        public void Grayscale_rect_CorrectProcessor()
+        {
+            this.operations.Grayscale(this.rect);
+            this.Verify<GrayscaleBt709Processor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs b/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
new file mode 100644
index 0000000000..0eb25043c7
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/HueTest.cs
@@ -0,0 +1,32 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class HueTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Hue_amount_HueProcessorDefaultsSet()
+        {
+            this.operations.Hue(34f);
+            var processor = this.Verify<HueProcessor>();
+
+            Assert.Equal(34f, processor.Degrees);
+        }
+
+        [Fact]
+        public void Hue_amount_rect_HueProcessorDefaultsSet()
+        {
+            this.operations.Hue(5f, this.rect);
+            var processor = this.Verify<HueProcessor>(this.rect);
+
+            Assert.Equal(5f, processor.Degrees);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs b/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
new file mode 100644
index 0000000000..ff59eab054
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/InvertTest.cs
@@ -0,0 +1,27 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Effects
+{
+    public class InvertTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Invert_InvertProcessorDefaultsSet()
+        {
+            this.operations.Invert();
+            var processor = this.Verify<InvertProcessor>();
+        }
+
+        [Fact]
+        public void Pixelate_rect_PixelateProcessorDefaultsSet()
+        {
+            this.operations.Invert(this.rect);
+            var processor = this.Verify<InvertProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs b/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
new file mode 100644
index 0000000000..a06a9d65c0
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/KodachromeTest.cs
@@ -0,0 +1,27 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class KodachromeTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Kodachrome_amount_KodachromeProcessorDefaultsSet()
+        {
+            this.operations.Kodachrome();
+            var processor = this.Verify<KodachromeProcessor>();
+        }
+
+        [Fact]
+        public void Kodachrome_amount_rect_KodachromeProcessorDefaultsSet()
+        {
+            this.operations.Kodachrome(this.rect);
+            var processor = this.Verify<KodachromeProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs b/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
new file mode 100644
index 0000000000..446cfa1c33
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/LomographTest.cs
@@ -0,0 +1,31 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors;
+using SixLabors.Primitives;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    using SixLabors.ImageSharp.Processing;
+    using SixLabors.ImageSharp.Processing.Processors.Filters;
+
+    public class LomographTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Lomograph_amount_LomographProcessorDefaultsSet()
+        {
+            this.operations.Lomograph();
+            var processor = this.Verify<LomographProcessor>();
+        }
+
+        [Fact]
+        public void Lomograph_amount_rect_LomographProcessorDefaultsSet()
+        {
+            this.operations.Lomograph(this.rect);
+            var processor = this.Verify<LomographProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs b/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
new file mode 100644
index 0000000000..95ea2c23e9
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/OpacityTest.cs
@@ -0,0 +1,31 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Effects
+{
+    public class OpacityTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Alpha_amount_AlphaProcessorDefaultsSet()
+        {
+            this.operations.Opacity(0.2f);
+            OpacityProcessor processor = this.Verify<OpacityProcessor>();
+
+            Assert.Equal(.2f, processor.Amount);
+        }
+
+        [Fact]
+        public void Alpha_amount_rect_AlphaProcessorDefaultsSet()
+        {
+            this.operations.Opacity(0.6f, this.rect);
+            OpacityProcessor processor = this.Verify<OpacityProcessor>(this.rect);
+
+            Assert.Equal(.6f, processor.Amount);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs b/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
new file mode 100644
index 0000000000..f63b892bc9
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/PolaroidTest.cs
@@ -0,0 +1,28 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class PolaroidTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Polaroid_amount_PolaroidProcessorDefaultsSet()
+        {
+            this.operations.Polaroid();
+            var processor = this.Verify<PolaroidProcessor>();
+        }
+
+        [Fact]
+        public void Polaroid_amount_rect_PolaroidProcessorDefaultsSet()
+        {
+            this.operations.Polaroid(this.rect);
+            var processor = this.Verify<PolaroidProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs b/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
new file mode 100644
index 0000000000..b1583b4aca
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/SaturateTest.cs
@@ -0,0 +1,31 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class SaturateTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Saturation_amount_SaturationProcessorDefaultsSet()
+        {
+            this.operations.Saturate(34);
+            SaturateProcessor processor = this.Verify<SaturateProcessor>();
+
+            Assert.Equal(34, processor.Amount);
+        }
+
+        [Fact]
+        public void Saturation_amount_rect_SaturationProcessorDefaultsSet()
+        {
+            this.operations.Saturate(5, this.rect);
+            SaturateProcessor processor = this.Verify<SaturateProcessor>(this.rect);
+
+            Assert.Equal(5, processor.Amount);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs b/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs
new file mode 100644
index 0000000000..441c9739d7
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/SepiaTest.cs
@@ -0,0 +1,27 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Filters
+{
+    public class SepiaTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Sepia_amount_SepiaProcessorDefaultsSet()
+        {
+            this.operations.Sepia();
+            var processor = this.Verify<SepiaProcessor>();
+        }
+
+        [Fact]
+        public void Sepia_amount_rect_SepiaProcessorDefaultsSet()
+        {
+            this.operations.Sepia(this.rect);
+            var processor = this.Verify<SepiaProcessor>(this.rect);
+        }
+    }
+}
\ No newline at end of file

From d8b918f14861d9d459599c9f0eadd30864e2835a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 02:17:33 +0200
Subject: [PATCH 110/223] fix warnings and improve xmldocs

---
 .../Advanced/AdvancedImageExtensions.cs       |  1 -
 src/ImageSharp/Formats/Bmp/BmpDecoder.cs      |  1 +
 src/ImageSharp/Formats/Gif/GifDecoder.cs      |  3 +-
 src/ImageSharp/Formats/IImageDecoder.cs       | 11 ++-
 src/ImageSharp/Formats/Jpeg/JpegDecoder.cs    |  3 +-
 src/ImageSharp/Formats/Png/PngDecoder.cs      |  3 +-
 src/ImageSharp/IImageVisitor.cs               | 22 +++++
 src/ImageSharp/Image.Decode.cs                |  4 +-
 src/ImageSharp/Image.FromFile.cs              | 13 ++-
 src/ImageSharp/Image.FromStream.cs            |  1 +
 src/ImageSharp/Image.WrapMemory.cs            |  8 +-
 src/ImageSharp/Image.cs                       | 43 ++++++----
 src/ImageSharp/ImageExtensions.cs             |  3 -
 src/ImageSharp/Image{TPixel}.cs               | 25 ++----
 .../Processing/IImageProcessingContext.cs     | 42 +++++++++
 .../IImageProcessingContext{TPixel}.cs        | 26 +-----
 src/ImageSharp/Processing/PadExtensions.cs    |  3 +-
 .../Processing/PolaroidExtensions.cs          |  1 -
 .../Processing/ProcessingExtensions.cs        | 85 +++++++++++--------
 .../Processors/Filters/BlackWhiteProcessor.cs |  3 +-
 .../Processors/Filters/FilterProcessor.cs     |  4 +
 .../LomographProcessorImplementation.cs       | 13 +--
 .../Processors/Filters/OpacityProcessor.cs    |  3 +-
 .../Processors/Filters/PolaroidProcessor.cs   | 26 +-----
 .../PolaroidProcessorImplementation.cs        | 31 +++++++
 .../Processors/Filters/ProtanopiaProcessor.cs |  1 -
 .../Processing/Processors/IImageProcessor.cs  | 13 ++-
 .../Transforms/Resize/ResizeProcessor.cs      | 72 +++++++++-------
 .../Resize/ResizeProcessorImplementation.cs   |  6 +-
 src/ImageSharp/Processing/ResizeExtensions.cs | 10 ---
 .../ImageSharp.Benchmarks.csproj              |  3 +-
 31 files changed, 287 insertions(+), 196 deletions(-)
 create mode 100644 src/ImageSharp/IImageVisitor.cs
 create mode 100644 src/ImageSharp/Processing/IImageProcessingContext.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs

diff --git a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
index 378b6e8b96..e0d7a4b184 100644
--- a/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
+++ b/src/ImageSharp/Advanced/AdvancedImageExtensions.cs
@@ -18,7 +18,6 @@ namespace SixLabors.ImageSharp.Advanced
         /// <summary>
         /// Gets the configuration for the image.
         /// </summary>
-        /// <typeparam name="TPixel">The Pixel format.</typeparam>
         /// <param name="source">The source image.</param>
         /// <returns>Returns the configuration.</returns>
         public static Configuration GetConfiguration(this Image source)
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
index 4922a92003..ebb7ffdf3c 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
@@ -30,6 +30,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             return new BmpDecoderCore(configuration, this).Decode<TPixel>(stream);
         }
 
+        /// <inheritdoc />
         public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/Formats/Gif/GifDecoder.cs b/src/ImageSharp/Formats/Gif/GifDecoder.cs
index 6498f4aa27..1addcd0abf 100644
--- a/src/ImageSharp/Formats/Gif/GifDecoder.cs
+++ b/src/ImageSharp/Formats/Gif/GifDecoder.cs
@@ -44,7 +44,8 @@ namespace SixLabors.ImageSharp.Formats.Gif
             var decoder = new GifDecoderCore(configuration, this);
             return decoder.Identify(stream);
         }
-        
+
+        /// <inheritdoc />
         public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
diff --git a/src/ImageSharp/Formats/IImageDecoder.cs b/src/ImageSharp/Formats/IImageDecoder.cs
index 625c4efb6f..8dafdac795 100644
--- a/src/ImageSharp/Formats/IImageDecoder.cs
+++ b/src/ImageSharp/Formats/IImageDecoder.cs
@@ -12,15 +12,22 @@ namespace SixLabors.ImageSharp.Formats
     public interface IImageDecoder
     {
         /// <summary>
-        /// Decodes the image from the specified stream to the <see cref="ImageFrame{TPixel}"/>.
+        /// Decodes the image from the specified stream to an <see cref="Image{TPixel}"/> of a specific pixel type.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="configuration">The configuration for the image.</param>
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
-        /// <returns>The decoded image</returns>
+        /// <returns>The decoded image of a given pixel type.</returns>
         Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
             where TPixel : struct, IPixel<TPixel>;
 
+        /// <summary>
+        /// Decodes the image from the specified stream to an <see cref="Image"/>.
+        /// The decoder is free to choose the pixel type.
+        /// </summary>
+        /// <param name="configuration">The configuration for the image.</param>
+        /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
+        /// <returns>The decoded image of a pixel type chosen by the decoder.</returns>
         Image Decode(Configuration configuration, Stream stream);
     }
 }
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
index 7459abec56..a1bf048521 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
@@ -38,7 +38,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 return decoder.Identify(stream);
             }
         }
-        
+
+        /// <inheritdoc />
         public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Png/PngDecoder.cs b/src/ImageSharp/Formats/Png/PngDecoder.cs
index e8c5ac8e81..040da94737 100644
--- a/src/ImageSharp/Formats/Png/PngDecoder.cs
+++ b/src/ImageSharp/Formats/Png/PngDecoder.cs
@@ -59,7 +59,8 @@ namespace SixLabors.ImageSharp.Formats.Png
             var decoder = new PngDecoderCore(configuration, this);
             return decoder.Identify(stream);
         }
-        
+
+        /// <inheritdoc />
         public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/IImageVisitor.cs b/src/ImageSharp/IImageVisitor.cs
new file mode 100644
index 0000000000..971c4d37cb
--- /dev/null
+++ b/src/ImageSharp/IImageVisitor.cs
@@ -0,0 +1,22 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// A visitor to implement double-dispatch pattern in order to apply pixel-specific operations
+    /// on non-generic <see cref="Image"/> instances. The operation is dispatched by <see cref="Image.AcceptVisitor"/>.
+    /// </summary>
+    internal interface IImageVisitor
+    {
+        /// <summary>
+        /// Provides a pixel-specific implementation for a given operation.
+        /// </summary>
+        /// <param name="image">The image.</param>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
+        void Visit<TPixel>(Image<TPixel> image)
+            where TPixel : struct, IPixel<TPixel>;
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Image.Decode.cs b/src/ImageSharp/Image.Decode.cs
index 17a15a9160..8d0df599ea 100644
--- a/src/ImageSharp/Image.Decode.cs
+++ b/src/ImageSharp/Image.Decode.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp
         /// The image might be filled with memory garbage.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="configuration">The <see cref="Configuration"/></param>
+        /// <param name="configuration">The <see cref="ImageSharp.Configuration"/></param>
         /// <param name="width">The width of the image</param>
         /// <param name="height">The height of the image</param>
         /// <param name="metadata">The <see cref="ImageMetadata"/></param>
@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp
             Image<TPixel> img = decoder.Decode<TPixel>(config, stream);
             return (img, format);
         }
-        
+
         private static (Image img, IImageFormat format) Decode(Stream stream, Configuration config)
         {
             IImageDecoder decoder = DiscoverDecoder(stream, config, out IImageFormat format);
diff --git a/src/ImageSharp/Image.FromFile.cs b/src/ImageSharp/Image.FromFile.cs
index 0b49668862..61500e20d7 100644
--- a/src/ImageSharp/Image.FromFile.cs
+++ b/src/ImageSharp/Image.FromFile.cs
@@ -162,7 +162,18 @@ namespace SixLabors.ImageSharp
                 return Load<TPixel>(config, stream, out format);
             }
         }
-        
+
+        /// <summary>
+        /// Create a new instance of the <see cref="Image"/> class from the given file.
+        /// The pixel type is selected by the decoder.
+        /// </summary>
+        /// <param name="config">The configuration options.</param>
+        /// <param name="path">The file path to the image.</param>
+        /// <param name="format">The mime type of the decoded image.</param>
+        /// <exception cref="NotSupportedException">
+        /// Thrown if the stream is not readable nor seekable.
+        /// </exception>
+        /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
         public static Image Load(Configuration config, string path, out IImageFormat format)
         {
             using (Stream stream = config.FileSystem.OpenRead(path))
diff --git a/src/ImageSharp/Image.FromStream.cs b/src/ImageSharp/Image.FromStream.cs
index b16501b0f2..a4a9eeec75 100644
--- a/src/ImageSharp/Image.FromStream.cs
+++ b/src/ImageSharp/Image.FromStream.cs
@@ -182,6 +182,7 @@ namespace SixLabors.ImageSharp
 
             throw new NotSupportedException(sb.ToString());
         }
+
         private static Image Load(Configuration config, Stream stream, out IImageFormat format)
         {
             config = config ?? Configuration.Default;
diff --git a/src/ImageSharp/Image.WrapMemory.cs b/src/ImageSharp/Image.WrapMemory.cs
index 49bc99e9ee..095991b076 100644
--- a/src/ImageSharp/Image.WrapMemory.cs
+++ b/src/ImageSharp/Image.WrapMemory.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp
         /// allowing to view/manipulate it as an ImageSharp <see cref="Image{TPixel}"/> instance.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="config">The <see cref="Configuration"/></param>
+        /// <param name="config">The <see cref="ImageSharp.Configuration"/></param>
         /// <param name="pixelMemory">The pixel memory.</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp
         /// allowing to view/manipulate it as an ImageSharp <see cref="Image{TPixel}"/> instance.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="config">The <see cref="Configuration"/></param>
+        /// <param name="config">The <see cref="ImageSharp.Configuration"/></param>
         /// <param name="pixelMemory">The pixel memory.</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp
         /// It will be disposed together with the result image.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type</typeparam>
-        /// <param name="config">The <see cref="Configuration"/></param>
+        /// <param name="config">The <see cref="ImageSharp.Configuration"/></param>
         /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
@@ -111,7 +111,7 @@ namespace SixLabors.ImageSharp
         /// It will be disposed together with the result image.
         /// </summary>
         /// <typeparam name="TPixel">The pixel type.</typeparam>
-        /// <param name="config">The <see cref="Configuration"/></param>
+        /// <param name="config">The <see cref="ImageSharp.Configuration"/></param>
         /// <param name="pixelMemoryOwner">The <see cref="IMemoryOwner{T}"/> that is being transferred to the image.</param>
         /// <param name="width">The width of the memory image.</param>
         /// <param name="height">The height of the memory image.</param>
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index a27f16ab30..d0a1c4319d 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -10,15 +10,30 @@ using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
-    internal interface IImageVisitor
-    {
-        void Visit<TPixel>(Image<TPixel> image)
-            where TPixel : struct, IPixel<TPixel>;
-    }
-    
+    /// <summary>
+    /// Encapsulates an image, which consists of the pixel data for a graphics image and its attributes.
+    /// For the non-generic <see cref="Image"/> type, the pixel type is only known at runtime.
+    /// <see cref="Image"/> is always implemented by a pixel-specific <see cref="Image{TPixel}"/> instance.
+    /// </summary>
     public abstract partial class Image : IImage, IConfigurable
     {
-        protected readonly Configuration configuration;
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        /// <param name="configuration">The <see cref="Configuration"/>.</param>
+        /// <param name="pixelType">The <see cref="PixelTypeInfo"/>.</param>
+        /// <param name="metadata">The <see cref="ImageMetadata"/>.</param>
+        protected Image(Configuration configuration, PixelTypeInfo pixelType, ImageMetadata metadata)
+        {
+            this.Configuration = configuration ?? Configuration.Default;
+            this.PixelType = pixelType;
+            this.Metadata = metadata ?? new ImageMetadata();
+        }
+
+        /// <summary>
+        /// Gets the <see cref="Configuration"/>.
+        /// </summary>
+        protected Configuration Configuration { get; }
 
         /// <inheritdoc/>
         public PixelTypeInfo PixelType { get; }
@@ -28,22 +43,16 @@ namespace SixLabors.ImageSharp
 
         /// <inheritdoc />
         public abstract int Height { get; }
-        
+
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
 
         /// <summary>
         /// Gets the pixel buffer.
         /// </summary>
-        Configuration IConfigurable.Configuration => this.configuration;
-
-        protected Image(Configuration configuration, PixelTypeInfo pixelType, ImageMetadata metadata)
-        {
-            this.configuration = configuration ?? Configuration.Default;
-            this.PixelType = pixelType;
-            this.Metadata = metadata ?? new ImageMetadata();
-        }
+        Configuration IConfigurable.Configuration => this.Configuration;
 
+        /// <inheritdoc />
         public abstract void Dispose();
 
         internal abstract void AcceptVisitor(IImageVisitor visitor);
@@ -63,7 +72,7 @@ namespace SixLabors.ImageSharp
             this.AcceptVisitor(visitor);
         }
 
-        class EncodeVisitor : IImageVisitor
+        private class EncodeVisitor : IImageVisitor
         {
             private readonly IImageEncoder encoder;
 
diff --git a/src/ImageSharp/ImageExtensions.cs b/src/ImageSharp/ImageExtensions.cs
index 3bd60694d5..ec4c364d83 100644
--- a/src/ImageSharp/ImageExtensions.cs
+++ b/src/ImageSharp/ImageExtensions.cs
@@ -19,7 +19,6 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Writes the image to the given stream using the currently loaded image format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The source image.</param>
         /// <param name="filePath">The file path to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
@@ -61,7 +60,6 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Writes the image to the given stream using the currently loaded image format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The source image.</param>
         /// <param name="filePath">The file path to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
@@ -78,7 +76,6 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Writes the image to the given stream using the currently loaded image format.
         /// </summary>
-        /// <typeparam name="TPixel">The Pixel format.</typeparam>
         /// <param name="source">The source image.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="format">The format to save the image in.</param>
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index ea6d0beb25..243e2912be 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -16,6 +16,7 @@ namespace SixLabors.ImageSharp
 {
     /// <summary>
     /// Encapsulates an image, which consists of the pixel data for a graphics image and its attributes.
+    /// For generic <see cref="Image{TPixel}"/>-s the pixel type is known at compile time.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
     public sealed class Image<TPixel> : Image
@@ -68,8 +69,6 @@ namespace SixLabors.ImageSharp
         internal Image(Configuration configuration, int width, int height, ImageMetadata metadata)
             : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, default(TPixel));
         }
 
@@ -85,8 +84,6 @@ namespace SixLabors.ImageSharp
         internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetadata metadata)
             : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.Metadata = metadata;
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, memorySource);
         }
 
@@ -102,8 +99,6 @@ namespace SixLabors.ImageSharp
         internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetadata metadata)
             : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.Metadata = metadata ?? new ImageMetadata();
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, backgroundColor);
         }
 
@@ -115,27 +110,18 @@ namespace SixLabors.ImageSharp
         /// <param name="metadata">The images metadata.</param>
         /// <param name="frames">The frames that will be owned by this image instance.</param>
         internal Image(Configuration configuration, ImageMetadata metadata, IEnumerable<ImageFrame<TPixel>> frames)
-            : base(configuration,PixelTypeInfo.Create<TPixel>(), metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
         {
-            this.PixelType = new PixelTypeInfo(Unsafe.SizeOf<TPixel>() * 8);
-            this.Metadata = metadata ?? new ImageMetadata();
-
             this.Frames = new ImageFrameCollection<TPixel>(this, frames);
         }
 
-
-        /// <inheritdoc/>
-        public PixelTypeInfo PixelType { get; }
-
         /// <inheritdoc/>
         public override int Width => this.Frames.RootFrame.Width;
 
         /// <inheritdoc/>
         public override int Height => this.Frames.RootFrame.Height;
 
-        /// <inheritdoc/>
-        public ImageMetadata Metadata { get; }
-
+        /// <summary>
         /// Gets the frames.
         /// </summary>
         public ImageFrameCollection<TPixel> Frames { get; }
@@ -154,7 +140,6 @@ namespace SixLabors.ImageSharp
         public TPixel this[int x, int y]
         {
             get => this.PixelSource.PixelBuffer[x, y];
-
             set => this.PixelSource.PixelBuffer[x, y] = value;
         }
 
@@ -162,7 +147,7 @@ namespace SixLabors.ImageSharp
         /// Clones the current image
         /// </summary>
         /// <returns>Returns a new image with all the same metadata as the original.</returns>
-        public Image<TPixel> Clone() => this.Clone(this.configuration);
+        public Image<TPixel> Clone() => this.Clone(this.Configuration);
 
         /// <summary>
         /// Clones the current image with the given configuration.
@@ -181,7 +166,7 @@ namespace SixLabors.ImageSharp
         /// <typeparam name="TPixel2">The pixel format.</typeparam>
         /// <returns>The <see cref="Image{TPixel2}"/></returns>
         public Image<TPixel2> CloneAs<TPixel2>()
-            where TPixel2 : struct, IPixel<TPixel2> => this.CloneAs<TPixel2>(this.configuration);
+            where TPixel2 : struct, IPixel<TPixel2> => this.CloneAs<TPixel2>(this.Configuration);
 
         /// <summary>
         /// Returns a copy of the image in the given pixel format.
diff --git a/src/ImageSharp/Processing/IImageProcessingContext.cs b/src/ImageSharp/Processing/IImageProcessingContext.cs
new file mode 100644
index 0000000000..509b1313d9
--- /dev/null
+++ b/src/ImageSharp/Processing/IImageProcessingContext.cs
@@ -0,0 +1,42 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Processing.Processors;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing
+{
+    /// <summary>
+    /// A pixel-agnostic interface to queue up image operations to apply to an image.
+    /// </summary>
+    public interface IImageProcessingContext
+    {
+        /// <summary>
+        /// Gets a reference to the <see cref="MemoryAllocator" /> used to allocate buffers
+        /// for this context.
+        /// </summary>
+        MemoryAllocator MemoryAllocator { get; }
+
+        /// <summary>
+        /// Gets the image dimensions at the current point in the processing pipeline.
+        /// </summary>
+        /// <returns>The <see cref="Rectangle"/>.</returns>
+        Size GetCurrentSize();
+
+        /// <summary>
+        /// Adds the processor to the current set of image operations to be applied.
+        /// </summary>
+        /// <param name="processor">The processor to apply.</param>
+        /// <param name="rectangle">The area to apply it to.</param>
+        /// <returns>The current operations class to allow chaining of operations.</returns>
+        IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle);
+
+        /// <summary>
+        /// Adds the processor to the current set of image operations to be applied.
+        /// </summary>
+        /// <param name="processor">The processor to apply.</param>
+        /// <returns>The current operations class to allow chaining of operations.</returns>
+        IImageProcessingContext ApplyProcessor(IImageProcessor processor);
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
index fefa973f7c..b49cfe2151 100644
--- a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
+++ b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
@@ -3,32 +3,12 @@
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.Memory;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
-    public interface IImageProcessingContext
-    {
-        /// <summary>
-        /// Gets a reference to the <see cref="MemoryAllocator" /> used to allocate buffers
-        /// for this context.
-        /// </summary>
-        MemoryAllocator MemoryAllocator { get; }
-
-        /// <summary>
-        /// Gets the image dimensions at the current point in the processing pipeline.
-        /// </summary>
-        /// <returns>The <see cref="Rectangle"/></returns>
-        Size GetCurrentSize();
-
-        IImageProcessingContext ApplyProcessor(IImageProcessor processor, Rectangle rectangle);
-
-        IImageProcessingContext ApplyProcessor(IImageProcessor processor);
-    }
-
     /// <summary>
-    /// An interface to queue up image operations to apply to an image.
+    /// A pixel-specific interface to queue up image operations to apply to an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format</typeparam>
     public interface IImageProcessingContext<TPixel> : IImageProcessingContext
@@ -37,8 +17,8 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Adds the processor to the current set of image operations to be applied.
         /// </summary>
-        /// <param name="processor">The processor to apply</param>
-        /// <param name="rectangle">The area to apply it to</param>
+        /// <param name="processor">The processor to apply.</param>
+        /// <param name="rectangle">The area to apply it to.</param>
         /// <returns>The current operations class to allow chaining of operations.</returns>
         IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle);
 
diff --git a/src/ImageSharp/Processing/PadExtensions.cs b/src/ImageSharp/Processing/PadExtensions.cs
index 2db219795f..0422f7c59d 100644
--- a/src/ImageSharp/Processing/PadExtensions.cs
+++ b/src/ImageSharp/Processing/PadExtensions.cs
@@ -14,7 +14,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Evenly pads an image to fit the new dimensions.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The source image to pad.</param>
         /// <param name="width">The new width.</param>
         /// <param name="height">The new height.</param>
@@ -25,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing
             {
                 Size = new Size(width, height),
                 Mode = ResizeMode.BoxPad,
-                Sampler = KnownResamplers.NearestNeighbor
+                Sampler = KnownResamplers.NearestNeighbor,
             };
 
             return source.Resize(options);
diff --git a/src/ImageSharp/Processing/PolaroidExtensions.cs b/src/ImageSharp/Processing/PolaroidExtensions.cs
index 4172c1d615..4e78411689 100644
--- a/src/ImageSharp/Processing/PolaroidExtensions.cs
+++ b/src/ImageSharp/Processing/PolaroidExtensions.cs
@@ -23,7 +23,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Alters the colors of the image recreating an old Polaroid camera effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
diff --git a/src/ImageSharp/Processing/ProcessingExtensions.cs b/src/ImageSharp/Processing/ProcessingExtensions.cs
index a1acf3aa0b..c72e8cfb77 100644
--- a/src/ImageSharp/Processing/ProcessingExtensions.cs
+++ b/src/ImageSharp/Processing/ProcessingExtensions.cs
@@ -13,43 +13,6 @@ namespace SixLabors.ImageSharp.Processing
     /// </summary>
     public static class ProcessingExtensions
     {
-        class ProcessingVisitor : IImageVisitor
-        {
-            private readonly Action<IImageProcessingContext> operation;
-
-            private readonly bool mutate;
-            
-            public Image ResultImage { get; private set; }
-
-            public ProcessingVisitor(Action<IImageProcessingContext> operation, bool mutate)
-            {
-                this.operation = operation;
-                this.mutate = mutate;
-            }
-
-            public void Visit<TPixel>(Image<TPixel> image)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                IInternalImageProcessingContext<TPixel> operationsRunner = image.GetConfiguration()
-                    .ImageOperationsProvider.CreateImageProcessingContext(image, this.mutate);
-                this.operation(operationsRunner);
-                this.ResultImage = operationsRunner.Apply();
-            }
-        }
-        
-        public static void Mutate(this Image source, Action<IImageProcessingContext> operation)
-        {
-            ProcessingVisitor visitor = new ProcessingVisitor(operation, true);
-            source.AcceptVisitor(visitor);
-        }
-
-        public static Image Clone(this Image source, Action<IImageProcessingContext> operation)
-        {
-            ProcessingVisitor visitor = new ProcessingVisitor(operation, false);
-            source.AcceptVisitor(visitor);
-            return visitor.ResultImage;
-        }
-        
         /// <summary>
         /// Applies the given operation to the mutable image.
         /// Useful when we need to extract information like Width/Height to parametrize the next operation working on the <see cref="IImageProcessingContext{TPixel}"/> chain.
@@ -62,6 +25,17 @@ namespace SixLabors.ImageSharp.Processing
         public static IImageProcessingContext<TPixel> Apply<TPixel>(this IImageProcessingContext<TPixel> source, Action<Image<TPixel>> operation)
             where TPixel : struct, IPixel<TPixel> => source.ApplyProcessor(new DelegateProcessor<TPixel>(operation));
 
+        /// <summary>
+        /// Mutates the source image by applying the image operation to it.
+        /// </summary>
+        /// <param name="source">The image to mutate.</param>
+        /// <param name="operation">The operation to perform on the source.</param>
+        public static void Mutate(this Image source, Action<IImageProcessingContext> operation)
+        {
+            ProcessingVisitor visitor = new ProcessingVisitor(operation, true);
+            source.AcceptVisitor(visitor);
+        }
+
         /// <summary>
         /// Mutates the source image by applying the image operation to it.
         /// </summary>
@@ -96,6 +70,19 @@ namespace SixLabors.ImageSharp.Processing
             operationsRunner.Apply();
         }
 
+        /// <summary>
+        /// Creates a deep clone of the current image. The clone is then mutated by the given operation.
+        /// </summary>
+        /// <param name="source">The image to clone.</param>
+        /// <param name="operation">The operation to perform on the clone.</param>
+        /// <returns>The new <see cref="SixLabors.ImageSharp.Image"/>.</returns>
+        public static Image Clone(this Image source, Action<IImageProcessingContext> operation)
+        {
+            ProcessingVisitor visitor = new ProcessingVisitor(operation, false);
+            source.AcceptVisitor(visitor);
+            return visitor.ResultImage;
+        }
+
         /// <summary>
         /// Creates a deep clone of the current image. The clone is then mutated by the given operation.
         /// </summary>
@@ -149,5 +136,29 @@ namespace SixLabors.ImageSharp.Processing
 
             return source;
         }
+
+        private class ProcessingVisitor : IImageVisitor
+        {
+            private readonly Action<IImageProcessingContext> operation;
+
+            private readonly bool mutate;
+
+            public ProcessingVisitor(Action<IImageProcessingContext> operation, bool mutate)
+            {
+                this.operation = operation;
+                this.mutate = mutate;
+            }
+
+            public Image ResultImage { get; private set; }
+
+            public void Visit<TPixel>(Image<TPixel> image)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                IInternalImageProcessingContext<TPixel> operationsRunner = image.GetConfiguration()
+                    .ImageOperationsProvider.CreateImageProcessingContext(image, this.mutate);
+                this.operation(operationsRunner);
+                this.ResultImage = operationsRunner.Apply();
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
index 8bf925cf0f..698f11cbf0 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
@@ -8,11 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a black and white filter matrix to the image
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     internal class BlackWhiteProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BlackWhiteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BlackWhiteProcessor"/> class.
         /// </summary>
         public BlackWhiteProcessor()
             : base(KnownFilterMatrices.BlackWhiteFilter)
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index 5637e97700..886b4e0962 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -6,6 +6,9 @@ using SixLabors.ImageSharp.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
+    /// <summary>
+    /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
+    /// </summary>
     public class FilterProcessor : IImageProcessor
     {
         /// <summary>
@@ -19,6 +22,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// </summary>
         public ColorMatrix Matrix { get; }
 
+        /// <inheritdoc />
         public virtual IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
index d851b98e06..a922e71256 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
@@ -7,20 +7,23 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
+    /// <summary>
+    /// Converts the colors of the image recreating an old Lomograph effect.
+    /// </summary>
     internal class LomographProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
 
-        /// <inheritdoc/>
-        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        public LomographProcessorImplementation(LomographProcessor definition)
+            : base(definition)
         {
-            new VignetteProcessor<TPixel>(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
         }
 
-        public LomographProcessorImplementation(FilterProcessor definition)
-            : base(definition)
+        /// <inheritdoc/>
+        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
+            new VignetteProcessor<TPixel>(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
index 2d6bf6e833..e790753f3b 100644
--- a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
@@ -8,11 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies an opacity filter matrix using the given amount.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     internal class OpacityProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="OpacityProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="OpacityProcessor"/> class.
         /// </summary>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
         public OpacityProcessor(float amount)
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
index af16d9eab2..0b272c3396 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
@@ -1,10 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Overlays;
-using SixLabors.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
@@ -13,33 +9,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     public class PolaroidProcessor : FilterProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="PolaroidProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="PolaroidProcessor" /> class.
         /// </summary>
         public PolaroidProcessor()
             : base(KnownFilterMatrices.PolaroidFilter)
         {
         }
 
+        /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
             new PolaroidProcessorImplementation<TPixel>(this);
     }
-
-    internal class PolaroidProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
-        private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
-
-        /// <inheritdoc/>
-        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            new VignetteProcessor<TPixel>(VeryDarkOrange).Apply(source, sourceRectangle, configuration);
-            new GlowProcessor<TPixel>(LightOrange, source.Width / 4F).Apply(source, sourceRectangle, configuration);
-        }
-
-        public PolaroidProcessorImplementation(FilterProcessor definition)
-            : base(definition)
-        {
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs
new file mode 100644
index 0000000000..ec3c5ed26b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs
@@ -0,0 +1,31 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Overlays;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Filters
+{
+    /// <summary>
+    /// Converts the colors of the image recreating an old Polaroid effect.
+    /// </summary>
+    internal class PolaroidProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
+        private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
+
+        public PolaroidProcessorImplementation(FilterProcessor definition)
+            : base(definition)
+        {
+        }
+
+        /// <inheritdoc/>
+        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            new VignetteProcessor<TPixel>(VeryDarkOrange).Apply(source, sourceRectangle, configuration);
+            new GlowProcessor<TPixel>(LightOrange, source.Width / 4F).Apply(source, sourceRectangle, configuration);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
index 94eeaae475..bd92579130 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
@@ -8,7 +8,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Protanopia (Red-Blind) color blindness.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     internal class ProtanopiaProcessor : FilterProcessor
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor.cs b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
index 68db453806..e9b2c9c0e3 100644
--- a/src/ImageSharp/Processing/Processors/IImageProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
@@ -6,14 +6,23 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors
 {
+    /// <summary>
+    /// Defines an algorithm to alter the pixels of an image.
+    /// </summary>
     public interface IImageProcessor
     {
+        /// <summary>
+        /// Creates a pixel specific <see cref="IImageProcessor{TPixel}"/> that is capable for executing
+        /// the processing algorithm on an <see cref="Image{TPixel}"/>.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
+        /// <returns>The <see cref="IImageProcessor{TPixel}"/></returns>
         IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>;
     }
 
     /// <summary>
-    /// Encapsulates methods to alter the pixels of an image.
+    /// Implements an algorithm to alter the pixels of an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
     public interface IImageProcessor<TPixel>
@@ -58,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing.Processors
             public void Visit<TPixel>(Image<TPixel> image)
                 where TPixel : struct, IPixel<TPixel>
             {
-                var processorImpl = processor.CreatePixelSpecificProcessor<TPixel>();
+                var processorImpl = this.processor.CreatePixelSpecificProcessor<TPixel>();
                 processorImpl.Apply(image, this.sourceRectangle);
             }
         }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index d3077b7e65..021451b5c7 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -8,36 +8,20 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
-    // The non-generic processor is responsible for:
-    // - Encapsulating the parameters of the processor
-    // - Implementing a factory method to create the pixel-specific processor that contains the implementation
+    /// <summary>
+    /// Implements resizing of images using various resamplers.
+    /// </summary>
     public class ResizeProcessor : IImageProcessor
     {
         /// <summary>
-        /// Gets the sampler to perform the resize operation.
+        /// Initializes a new instance of the <see cref="ResizeProcessor"/> class.
         /// </summary>
-        public IResampler Sampler { get; }
-
-        /// <summary>
-        /// Gets the target width.
-        /// </summary>
-        public int Width { get; }
-
-        /// <summary>
-        /// Gets the target height.
-        /// </summary>
-        public int Height { get; }
-
-        /// <summary>
-        /// Gets the resize rectangle.
-        /// </summary>
-        public Rectangle TargetRectangle { get; }
-
-        /// <summary>
-        /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
-        /// </summary>
-        public bool Compand { get; }
-        
+        /// <param name="sampler">The <see cref="IResampler"/>.</param>
+        /// <param name="width">The width.</param>
+        /// <param name="height">The height.</param>
+        /// <param name="sourceSize">The size of the source image.</param>
+        /// <param name="targetRectangle">The target rectangle to resize into.</param>
+        /// <param name="compand">A value indicating whether to apply RGBA companding.</param>
         public ResizeProcessor(IResampler sampler, int width, int height, Size sourceSize, Rectangle targetRectangle, bool compand)
         {
             Guard.NotNull(sampler, nameof(sampler));
@@ -67,12 +51,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.TargetRectangle = targetRectangle;
             this.Compand = compand;
         }
-        
+
         /// <summary>
-        /// Initializes a new instance of the <see cref="ResizeProcessorImplementation{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ResizeProcessor"/> class.
         /// </summary>
-        /// <param name="options">The resize options</param>
-        /// <param name="sourceSize">The source image size</param>
+        /// <param name="options">The resize options.</param>
+        /// <param name="sourceSize">The source image size.</param>
         public ResizeProcessor(ResizeOptions options, Size sourceSize)
         {
             Guard.NotNull(options, nameof(options));
@@ -109,7 +93,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ResizeProcessorImplementation{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ResizeProcessor"/> class.
         /// </summary>
         /// <param name="sampler">The sampler to perform the resize operation.</param>
         /// <param name="width">The target width.</param>
@@ -120,6 +104,32 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         {
         }
 
+        /// <summary>
+        /// Gets the sampler to perform the resize operation.
+        /// </summary>
+        public IResampler Sampler { get; }
+
+        /// <summary>
+        /// Gets the target width.
+        /// </summary>
+        public int Width { get; }
+
+        /// <summary>
+        /// Gets the target height.
+        /// </summary>
+        public int Height { get; }
+
+        /// <summary>
+        /// Gets the resize rectangle.
+        /// </summary>
+        public Rectangle TargetRectangle { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether to compress or expand individual pixel color values on processing.
+        /// </summary>
+        public bool Compand { get; }
+
+        /// <inheritdoc />
         public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
index 1a8bb931e0..36a054c54e 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
@@ -19,9 +19,11 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods that allow the resizing of images using various algorithms.
-    /// Adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>
+    /// Implements resizing of images using various resamplers.
     /// </summary>
+    /// <remarks>
+    /// The original code has been adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>.
+    /// </remarks>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
     internal class ResizeProcessorImplementation<TPixel> : TransformProcessorBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/Processing/ResizeExtensions.cs b/src/ImageSharp/Processing/ResizeExtensions.cs
index cf029eb152..57dbcb1d16 100644
--- a/src/ImageSharp/Processing/ResizeExtensions.cs
+++ b/src/ImageSharp/Processing/ResizeExtensions.cs
@@ -15,7 +15,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image in accordance with the given <see cref="ResizeOptions"/>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="options">The resize options.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
@@ -26,7 +25,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given <see cref="Size"/>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="size">The target image size.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
@@ -37,7 +35,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given <see cref="Size"/>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="size">The target image size.</param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
@@ -49,7 +46,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
@@ -61,7 +57,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
@@ -74,7 +69,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height with the given sampler.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
@@ -87,7 +81,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height with the given sampler.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="size">The target image size.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
@@ -100,7 +93,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height with the given sampler.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
@@ -115,7 +107,6 @@ namespace SixLabors.ImageSharp.Processing
         /// Resizes an image to the given width and height with the given sampler and
         /// source rectangle.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
@@ -142,7 +133,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Resizes an image to the given width and height with the given sampler and source rectangle.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
diff --git a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
index 9af4d57cff..2a5408da17 100644
--- a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
+++ b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <OutputType>Exe</OutputType>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <RootNamespace>SixLabors.ImageSharp.Benchmarks</RootNamespace>

From 2995f596ef77a260ead68c506f91126f6ee8f733 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 14:34:11 +0200
Subject: [PATCH 111/223] *ProcessorImplementation<T> ===> *Processor<T>,

add suppression of SA1413 to AssemblyInfo.cs
---
 .../Processing/Processors/Filters/FilterProcessor.cs   |  2 +-
 ...sorImplementation.cs => FilterProcessor{TPixel}.cs} |  4 ++--
 .../Processors/Filters/GrayscaleBt709Processor.cs      |  2 +-
 .../Processors/Filters/LomographProcessor.cs           |  2 +-
 ...Implementation.cs => LomographProcessor{TPixel}.cs} |  4 ++--
 .../Processing/Processors/Filters/PolaroidProcessor.cs |  2 +-
 ...rImplementation.cs => PolaroidProcessor{TPixel}.cs} |  4 ++--
 .../Processors/Transforms/Resize/ResizeProcessor.cs    |  2 +-
 ...sorImplementation.cs => ResizeProcessor{TPixel}.cs} |  4 ++--
 src/ImageSharp/Properties/AssemblyInfo.cs              | 10 +++++++++-
 .../ImageSharp.Tests/Processing/Transforms/PadTest.cs  |  2 +-
 11 files changed, 23 insertions(+), 15 deletions(-)
 rename src/ImageSharp/Processing/Processors/Filters/{FilterProcessorImplementation.cs => FilterProcessor{TPixel}.cs} (92%)
 rename src/ImageSharp/Processing/Processors/Filters/{LomographProcessorImplementation.cs => LomographProcessor{TPixel}.cs} (83%)
 rename src/ImageSharp/Processing/Processors/Filters/{PolaroidProcessorImplementation.cs => PolaroidProcessor{TPixel}.cs} (86%)
 rename src/ImageSharp/Processing/Processors/Transforms/Resize/{ResizeProcessorImplementation.cs => ResizeProcessor{TPixel}.cs} (97%)

diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index 886b4e0962..b615b7bc60 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         public virtual IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
-            return new FilterProcessorImplementation<TPixel>(this);
+            return new FilterProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor{TPixel}.cs
similarity index 92%
rename from src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
rename to src/ImageSharp/Processing/Processors/Filters/FilterProcessor{TPixel}.cs
index 8fea81564c..ab60a42793 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor{TPixel}.cs
@@ -15,12 +15,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class FilterProcessorImplementation<TPixel> : ImageProcessor<TPixel>
+    internal class FilterProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly FilterProcessor definition;
 
-        public FilterProcessorImplementation(FilterProcessor definition)
+        public FilterProcessor(FilterProcessor definition)
         {
             this.definition = definition;
         }
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
index 038a2885bc..7bbd915564 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         internal void ApplyToFrame<TPixel>(ImageFrame<TPixel> frame, Rectangle sourceRectangle, Configuration configuration)
             where TPixel : struct, IPixel<TPixel>
         {
-            var processorImpl = new FilterProcessorImplementation<TPixel>(new GrayscaleBt709Processor(1F));
+            var processorImpl = new FilterProcessor<TPixel>(new GrayscaleBt709Processor(1F));
             processorImpl.Apply(frame, sourceRectangle, configuration);
         }
     }
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
index 345d829ac6..b102f4daf7 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
@@ -17,6 +17,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         }
 
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
-            new LomographProcessorImplementation<TPixel>(this);
+            new LomographProcessor<TPixel>(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
similarity index 83%
rename from src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
rename to src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
index a922e71256..8ec4ec258a 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
@@ -10,12 +10,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Lomograph effect.
     /// </summary>
-    internal class LomographProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
+    internal class LomographProcessor<TPixel> : FilterProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
 
-        public LomographProcessorImplementation(LomographProcessor definition)
+        public LomographProcessor(LomographProcessor definition)
             : base(definition)
         {
         }
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
index 0b272c3396..341c02acfc 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
@@ -18,6 +18,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
 
         /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
-            new PolaroidProcessorImplementation<TPixel>(this);
+            new PolaroidProcessor<TPixel>(this);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
similarity index 86%
rename from src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs
rename to src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
index ec3c5ed26b..a73aa28de3 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
@@ -10,13 +10,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Polaroid effect.
     /// </summary>
-    internal class PolaroidProcessorImplementation<TPixel> : FilterProcessorImplementation<TPixel>
+    internal class PolaroidProcessor<TPixel> : FilterProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
         private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
 
-        public PolaroidProcessorImplementation(FilterProcessor definition)
+        public PolaroidProcessor(FilterProcessor definition)
             : base(definition)
         {
         }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 021451b5c7..5710c4bd8c 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -133,7 +133,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
-            return new ResizeProcessorImplementation<TPixel>(this);
+            return new ResizeProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
similarity index 97%
rename from src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
rename to src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
index 36a054c54e..cf99f28dd7 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessorImplementation.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// The original code has been adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>.
     /// </remarks>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ResizeProcessorImplementation<TPixel> : TransformProcessorBase<TPixel>
+    internal class ResizeProcessor<TPixel> : TransformProcessorBase<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         // The following fields are not immutable but are optionally created on demand.
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         private readonly ResizeProcessor parameterSource;
 
-        public ResizeProcessorImplementation(ResizeProcessor parameterSource)
+        public ResizeProcessor(ResizeProcessor parameterSource)
         {
             this.parameterSource = parameterSource;
         }
diff --git a/src/ImageSharp/Properties/AssemblyInfo.cs b/src/ImageSharp/Properties/AssemblyInfo.cs
index 7b8f933b0c..f4459887f0 100644
--- a/src/ImageSharp/Properties/AssemblyInfo.cs
+++ b/src/ImageSharp/Properties/AssemblyInfo.cs
@@ -1,6 +1,14 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
+
 using System.Runtime.CompilerServices;
 
 // Ensure the other projects can see the internal helpers
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Drawing")]
\ No newline at end of file
+[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Drawing")]
+
+// Redundant suppressing of SA1413 for Rider.
+[assembly:
+    System.Diagnostics.CodeAnalysis.SuppressMessage(
+        "StyleCop.CSharp.MaintainabilityRules",
+        "SA1413:UseTrailingCommasInMultiLineInitializers",
+        Justification = "Follows SixLabors.ruleset")]
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
index eca1a458b1..82d7682558 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             IResampler sampler = KnownResamplers.NearestNeighbor;
 
             this.operations.Pad(width, height);
-            ResizeProcessorImplementation<Rgba32> resizeProcessor = this.Verify<ResizeProcessorImplementation<Rgba32>>();
+            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);

From 8b0416f13817012696211bf309b8c778e85d7867 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 17:02:46 +0200
Subject: [PATCH 112/223] validating tests for Convolution processors

---
 src/ImageSharp/Common/Helpers/Vector4Utils.cs |  2 +-
 .../Convolution/EdgeDetector2DProcessor.cs    |  2 +-
 .../Basic1ParameterConvolutionTests.cs        | 56 +++++++++++++++++++
 .../Processors/Convolution/BoxBlurTest.cs     | 44 ++-------------
 .../Processors/Convolution/DetectEdgesTest.cs | 19 ++++---
 .../Convolution/GaussianBlurTest.cs           | 35 ++----------
 .../Convolution/GaussianSharpenTest.cs        | 40 ++-----------
 tests/Images/External                         |  2 +-
 8 files changed, 85 insertions(+), 115 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs

diff --git a/src/ImageSharp/Common/Helpers/Vector4Utils.cs b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
index 5c122217d1..a4e0921d0a 100644
--- a/src/ImageSharp/Common/Helpers/Vector4Utils.cs
+++ b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
@@ -92,7 +92,7 @@ namespace SixLabors.ImageSharp
         }
 
         /// <summary>
-        /// Bulk variant of <see cref="Transform(ref Vector4, ref ColorMatrix)"/>
+        /// Bulk variant of <see cref="Transform(ref Vector4, ref ColorMatrix)"/>.
         /// </summary>
         /// <param name="vectors">The span of vectors</param>
         /// <param name="matrix">The transformation matrix.</param>
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index c08a176618..b4ac89139a 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public DenseMatrix<float> KernelY { get; }
 
         /// <inheritdoc/>
-        public bool Grayscale { get; set; }
+        public bool Grayscale { get; }
 
         /// <inheritdoc />
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
new file mode 100644
index 0000000000..1f939a281b
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
@@ -0,0 +1,56 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
+{
+    [GroupOutput("Convolution")]
+    public abstract class Basic1ParameterConvolutionTests
+    {
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.05F);
+        
+        public static readonly TheoryData<int> Values = new TheoryData<int> { 3, 5 };
+        
+        public static readonly string[] InputImages =
+            {
+                TestImages.Bmp.Car,
+                TestImages.Png.CalliphoraPartial
+            };
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), nameof(Values), PixelTypes.Rgba32)]
+        public void OnFullImage<TPixel>(TestImageProvider<TPixel> provider, int value)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunValidatingProcessorTest(
+                x => this.Apply(x, value),
+                value,
+                ValidatorComparer);
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), nameof(Values), PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider, int value)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => this.Apply(x, value, rect),
+                value,
+                ValidatorComparer);
+        }
+
+        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value)
+            where TPixel : struct, IPixel<TPixel>;
+        
+        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds)
+            where TPixel : struct, IPixel<TPixel>;
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
index 1f0d12cf7f..923f9d6161 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
@@ -1,51 +1,17 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-
 using SixLabors.Primitives;
-using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class BoxBlurTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class BoxBlurTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> BoxBlurValues
-        = new TheoryData<int>
-        {
-            3,
-            5
-        };
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BoxBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyBoxBlurFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.BoxBlur(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BoxBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyBoxBlurFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.BoxBlur(value, bounds));
-                image.DebugSave(provider, value);
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.BoxBlur(value);
 
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.BoxBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
index b6a7741b3c..05524b20b0 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
@@ -10,13 +10,16 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class DetectEdgesTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class DetectEdgesTest
     {
         // I think our comparison is not accurate enough (nor can be) for RgbaVector.
         // The image pixels are identical according to BeyondCompare.
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.0456F);
 
-        public static readonly string[] CommonTestImages = { TestImages.Png.Bike };
+        public static readonly string[] TestImages = { Tests.TestImages.Png.Bike };
+        
+        public const PixelTypes CommonNonDefaultPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
 
         public static readonly TheoryData<EdgeDetectionOperators> DetectEdgesFilters = new TheoryData<EdgeDetectionOperators>
         {
@@ -33,7 +36,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         };
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        [WithFileCollection(nameof(TestImages), PixelTypes.Rgba32)]
         public void DetectEdges_WorksOnWrappedMemoryImage<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -49,8 +52,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithTestPatternImages(nameof(DetectEdgesFilters), 100, 100, DefaultPixelType)]
-        [WithFileCollection(nameof(CommonTestImages), nameof(DetectEdgesFilters), DefaultPixelType)]
+        [WithTestPatternImages(nameof(DetectEdgesFilters), 100, 100, PixelTypes.Rgba32)]
+        [WithFileCollection(nameof(TestImages), nameof(DetectEdgesFilters), PixelTypes.Rgba32)]
         public void DetectEdges_WorksWithAllFilters<TPixel>(TestImageProvider<TPixel> provider, EdgeDetectionOperators detector)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -63,7 +66,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), CommonNonDefaultPixelTypes)]
+        [WithFileCollection(nameof(TestImages), CommonNonDefaultPixelTypes)]
         public void DetectEdges_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -76,7 +79,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFile(TestImages.Gif.Giphy, DefaultPixelType)]
+        [WithFile(Tests.TestImages.Gif.Giphy, PixelTypes.Rgba32)]
         public void DetectEdges_IsAppliedToAllFrames<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -88,7 +91,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        [WithFileCollection(nameof(TestImages), PixelTypes.Rgba32)]
         public void DetectEdges_InBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
index 6bd3b34bb1..6307a1c51d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
@@ -10,37 +10,12 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class GaussianBlurTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class GaussianBlurTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> GaussianBlurValues = new TheoryData<int> { 3, 5 };
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianBlur(value);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianBlurFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.GaussianBlur(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianBlurFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.GaussianBlur(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.GaussianBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
index 8eb1f85eb2..29a1643b0c 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
@@ -9,42 +9,12 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class GaussianSharpenTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class GaussianSharpenTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> GaussianSharpenValues
-        = new TheoryData<int>
-        {
-            3,
-            5
-        };
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianSharpen(value);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianSharpenValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianSharpenFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.GaussianSharpen(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianSharpenValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianSharpenFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.GaussianSharpen(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.GaussianSharpen(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 1ca5154996..2a3247c6da 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 1ca515499663e8b0b7c924a49b8d212f7447bdb0
+Subproject commit 2a3247c6da18b8a96cc71e1f2862ac03f2a42315

From 01ae31cd146a89c5f93fce35a31041cdcf4d132b Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 17:05:48 +0200
Subject: [PATCH 113/223] validating tests for Convolution processors

---
 src/ImageSharp/Common/Helpers/Vector4Utils.cs |  2 +-
 .../Convolution/EdgeDetector2DProcessor.cs    |  2 +-
 .../Basic1ParameterConvolutionTests.cs        | 56 +++++++++++++++++++
 .../Processors/Convolution/BoxBlurTest.cs     | 44 ++-------------
 .../Processors/Convolution/DetectEdgesTest.cs | 19 ++++---
 .../Convolution/GaussianBlurTest.cs           | 35 ++----------
 .../Convolution/GaussianSharpenTest.cs        | 40 ++-----------
 tests/Images/External                         |  2 +-
 8 files changed, 85 insertions(+), 115 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs

diff --git a/src/ImageSharp/Common/Helpers/Vector4Utils.cs b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
index 5c122217d1..a4e0921d0a 100644
--- a/src/ImageSharp/Common/Helpers/Vector4Utils.cs
+++ b/src/ImageSharp/Common/Helpers/Vector4Utils.cs
@@ -92,7 +92,7 @@ namespace SixLabors.ImageSharp
         }
 
         /// <summary>
-        /// Bulk variant of <see cref="Transform(ref Vector4, ref ColorMatrix)"/>
+        /// Bulk variant of <see cref="Transform(ref Vector4, ref ColorMatrix)"/>.
         /// </summary>
         /// <param name="vectors">The span of vectors</param>
         /// <param name="matrix">The transformation matrix.</param>
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index d2e9630dc0..83746952cb 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public DenseMatrix<float> KernelY { get; }
 
         /// <inheritdoc/>
-        public bool Grayscale { get; set; }
+        public bool Grayscale { get; }
 
         /// <inheritdoc />
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
new file mode 100644
index 0000000000..1f939a281b
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
@@ -0,0 +1,56 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
+{
+    [GroupOutput("Convolution")]
+    public abstract class Basic1ParameterConvolutionTests
+    {
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.05F);
+        
+        public static readonly TheoryData<int> Values = new TheoryData<int> { 3, 5 };
+        
+        public static readonly string[] InputImages =
+            {
+                TestImages.Bmp.Car,
+                TestImages.Png.CalliphoraPartial
+            };
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), nameof(Values), PixelTypes.Rgba32)]
+        public void OnFullImage<TPixel>(TestImageProvider<TPixel> provider, int value)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunValidatingProcessorTest(
+                x => this.Apply(x, value),
+                value,
+                ValidatorComparer);
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), nameof(Values), PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider, int value)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => this.Apply(x, value, rect),
+                value,
+                ValidatorComparer);
+        }
+
+        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value)
+            where TPixel : struct, IPixel<TPixel>;
+        
+        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds)
+            where TPixel : struct, IPixel<TPixel>;
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
index 1f0d12cf7f..923f9d6161 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
@@ -1,51 +1,17 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-
 using SixLabors.Primitives;
-using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class BoxBlurTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class BoxBlurTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> BoxBlurValues
-        = new TheoryData<int>
-        {
-            3,
-            5
-        };
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BoxBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyBoxBlurFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.BoxBlur(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BoxBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyBoxBlurFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.BoxBlur(value, bounds));
-                image.DebugSave(provider, value);
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.BoxBlur(value);
 
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.BoxBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
index b6a7741b3c..05524b20b0 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/DetectEdgesTest.cs
@@ -10,13 +10,16 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class DetectEdgesTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class DetectEdgesTest
     {
         // I think our comparison is not accurate enough (nor can be) for RgbaVector.
         // The image pixels are identical according to BeyondCompare.
         private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.0456F);
 
-        public static readonly string[] CommonTestImages = { TestImages.Png.Bike };
+        public static readonly string[] TestImages = { Tests.TestImages.Png.Bike };
+        
+        public const PixelTypes CommonNonDefaultPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
 
         public static readonly TheoryData<EdgeDetectionOperators> DetectEdgesFilters = new TheoryData<EdgeDetectionOperators>
         {
@@ -33,7 +36,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         };
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        [WithFileCollection(nameof(TestImages), PixelTypes.Rgba32)]
         public void DetectEdges_WorksOnWrappedMemoryImage<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -49,8 +52,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithTestPatternImages(nameof(DetectEdgesFilters), 100, 100, DefaultPixelType)]
-        [WithFileCollection(nameof(CommonTestImages), nameof(DetectEdgesFilters), DefaultPixelType)]
+        [WithTestPatternImages(nameof(DetectEdgesFilters), 100, 100, PixelTypes.Rgba32)]
+        [WithFileCollection(nameof(TestImages), nameof(DetectEdgesFilters), PixelTypes.Rgba32)]
         public void DetectEdges_WorksWithAllFilters<TPixel>(TestImageProvider<TPixel> provider, EdgeDetectionOperators detector)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -63,7 +66,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), CommonNonDefaultPixelTypes)]
+        [WithFileCollection(nameof(TestImages), CommonNonDefaultPixelTypes)]
         public void DetectEdges_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -76,7 +79,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFile(TestImages.Gif.Giphy, DefaultPixelType)]
+        [WithFile(Tests.TestImages.Gif.Giphy, PixelTypes.Rgba32)]
         public void DetectEdges_IsAppliedToAllFrames<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -88,7 +91,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), DefaultPixelType)]
+        [WithFileCollection(nameof(TestImages), PixelTypes.Rgba32)]
         public void DetectEdges_InBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
index 6bd3b34bb1..6307a1c51d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
@@ -10,37 +10,12 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class GaussianBlurTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class GaussianBlurTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> GaussianBlurValues = new TheoryData<int> { 3, 5 };
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianBlur(value);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianBlurFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.GaussianBlur(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianBlurValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianBlurFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.GaussianBlur(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.GaussianBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
index 8eb1f85eb2..29a1643b0c 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
@@ -9,42 +9,12 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
 {
-    public class GaussianSharpenTest : FileTestBase
+    [GroupOutput("Convolution")]
+    public class GaussianSharpenTest : Basic1ParameterConvolutionTests
     {
-        public static readonly TheoryData<int> GaussianSharpenValues
-        = new TheoryData<int>
-        {
-            3,
-            5
-        };
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianSharpen(value);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianSharpenValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianSharpenFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.GaussianSharpen(value));
-                image.DebugSave(provider, value);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(GaussianSharpenValues), DefaultPixelType)]
-        public void ImageShouldApplyGaussianSharpenFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.GaussianSharpen(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+            ctx.GaussianSharpen(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 1ca5154996..2a3247c6da 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 1ca515499663e8b0b7c924a49b8d212f7447bdb0
+Subproject commit 2a3247c6da18b8a96cc71e1f2862ac03f2a42315

From 655ef9a3243d0a8c60b1c2dc98d14f1b4628eed8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 17:09:25 +0200
Subject: [PATCH 114/223] mark FileTestBase obsolete

---
 tests/ImageSharp.Tests/FileTestBase.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/ImageSharp.Tests/FileTestBase.cs b/tests/ImageSharp.Tests/FileTestBase.cs
index efd6c3b40e..a056bc474e 100644
--- a/tests/ImageSharp.Tests/FileTestBase.cs
+++ b/tests/ImageSharp.Tests/FileTestBase.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Collections.Generic;
 
 namespace SixLabors.ImageSharp.Tests
@@ -8,6 +9,7 @@ namespace SixLabors.ImageSharp.Tests
     /// <summary>
     /// The test base class for reading and writing to files.
     /// </summary>
+    [Obsolete("See: https://github.com/SixLabors/ImageSharp/issues/868")]
     public abstract class FileTestBase
     {
         /// <summary>

From 21346b57e70a4296055799db5386ae55c15fb16a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 17:30:35 +0200
Subject: [PATCH 115/223] improve DitherTests CQ

---
 .../Processors/Dithering/DitherTests.cs       | 133 +++++++++---------
 1 file changed, 68 insertions(+), 65 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
index 9774cb50cf..fbe7bb1822 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
@@ -2,128 +2,131 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Dithering;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using SixLabors.Primitives;
+
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
 {
-    public class DitherTests : FileTestBase
+    public class DitherTests
     {
-        public static readonly string[] CommonTestImages =
-            {
-                TestImages.Png.CalliphoraPartial, TestImages.Png.Bike
-            };
-
-        public static readonly TheoryData<string, IOrderedDither> OrderedDitherers = new TheoryData<string, IOrderedDither>
-        {
-            { "Bayer8x8", KnownDitherers.BayerDither8x8 },
-            { "Bayer4x4", KnownDitherers.BayerDither4x4 },
-            { "Ordered3x3", KnownDitherers.OrderedDither3x3 },
-            { "Bayer2x2", KnownDitherers.BayerDither2x2 }
-        };
-
-        public static readonly TheoryData<string, IErrorDiffuser> ErrorDiffusers = new TheoryData<string, IErrorDiffuser>
-        {
-            { "Atkinson", KnownDiffusers.Atkinson },
-            { "Burks", KnownDiffusers.Burks },
-            { "FloydSteinberg", KnownDiffusers.FloydSteinberg },
-            { "JarvisJudiceNinke", KnownDiffusers.JarvisJudiceNinke },
-            { "Sierra2", KnownDiffusers.Sierra2 },
-            { "Sierra3", KnownDiffusers.Sierra3 },
-            { "SierraLite", KnownDiffusers.SierraLite },
-            { "StevensonArce", KnownDiffusers.StevensonArce },
-            { "Stucki", KnownDiffusers.Stucki },
-        };
-
+        public const PixelTypes CommonNonDefaultPixelTypes =
+            PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.Rgb24 | PixelTypes.RgbaVector;
+        
+        public static readonly string[] CommonTestImages = { TestImages.Png.CalliphoraPartial, TestImages.Png.Bike };
+
+        public static readonly TheoryData<IErrorDiffuser> ErrorDiffusers = new TheoryData<IErrorDiffuser>
+                                                                               {
+                                                                                   KnownDiffusers.Atkinson,
+                                                                                   KnownDiffusers.Burks,
+                                                                                   KnownDiffusers.FloydSteinberg,
+                                                                                   KnownDiffusers.JarvisJudiceNinke,
+                                                                                   KnownDiffusers.Sierra2,
+                                                                                   KnownDiffusers.Sierra3,
+                                                                                   KnownDiffusers.SierraLite,
+                                                                                   KnownDiffusers.StevensonArce,
+                                                                                   KnownDiffusers.Stucki,
+                                                                               };
+
+        public static readonly TheoryData<IOrderedDither> OrderedDitherers = new TheoryData<IOrderedDither>
+                                                                                 {
+                                                                                     KnownDitherers.BayerDither8x8,
+                                                                                     KnownDitherers.BayerDither4x4,
+                                                                                     KnownDitherers.OrderedDither3x3,
+                                                                                     KnownDitherers.BayerDither2x2
+                                                                                 };
+        
         private static IOrderedDither DefaultDitherer => KnownDitherers.BayerDither4x4;
 
         private static IErrorDiffuser DefaultErrorDiffuser => KnownDiffusers.Atkinson;
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), nameof(OrderedDitherers), DefaultPixelType)]
-        [WithTestPatternImages(nameof(OrderedDitherers), 100, 100, DefaultPixelType)]
-        public void DitherFilter_WorksWithAllDitherers<TPixel>(TestImageProvider<TPixel> provider, string name, IOrderedDither ditherer)
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]
+        public void ApplyDiffusionFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
+            using (Image<TPixel> source = provider.GetImage())
+            using (Image<TPixel> image = source.Clone())
             {
-                image.Mutate(x => x.Dither(ditherer));
-                image.DebugSave(provider, name);
+                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+
+                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, .5F, bounds));
+                image.DebugSave(provider);
+
+                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
             }
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), nameof(ErrorDiffusers), DefaultPixelType)]
-        [WithTestPatternImages(nameof(ErrorDiffusers), 100, 100, DefaultPixelType)]
-        public void DiffusionFilter_WorksWithAllErrorDiffusers<TPixel>(TestImageProvider<TPixel> provider, string name, IErrorDiffuser diffuser)
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]
+        public void ApplyDitherFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
+            using (Image<TPixel> source = provider.GetImage())
+            using (Image<TPixel> image = source.Clone())
             {
-                image.Mutate(x => x.Diffuse(diffuser, .5F));
-                image.DebugSave(provider, name);
+                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+
+                image.Mutate(x => x.Dither(DefaultDitherer, bounds));
+                image.DebugSave(provider);
+
+                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
             }
         }
 
         [Theory]
         [WithFile(TestImages.Png.Filter0, CommonNonDefaultPixelTypes)]
-        public void DitherFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+            public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Dither(DefaultDitherer));
+                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, 0.5f));
                 image.DebugSave(provider);
             }
         }
 
         [Theory]
-        [WithFile(TestImages.Png.Filter0, CommonNonDefaultPixelTypes)]
-        public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(CommonTestImages), nameof(ErrorDiffusers), PixelTypes.Rgba32)]
+        public void DiffusionFilter_WorksWithAllErrorDiffusers<TPixel>(
+            TestImageProvider<TPixel> provider,
+            IErrorDiffuser diffuser)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, 0.5f));
-                image.DebugSave(provider);
+                image.Mutate(x => x.Diffuse(diffuser, .5F));
+                image.DebugSave(provider, diffuser.GetType().Name);
             }
         }
 
         [Theory]
-        [WithFile(TestImages.Png.CalliphoraPartial, DefaultPixelType)]
-        public void ApplyDitherFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFile(TestImages.Png.Filter0, CommonNonDefaultPixelTypes)]
+        public void DitherFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
+            using (Image<TPixel> image = provider.GetImage())
             {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Dither(DefaultDitherer, bounds));
+                image.Mutate(x => x.Dither(DefaultDitherer));
                 image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
             }
         }
 
         [Theory]
-        [WithFile(TestImages.Png.CalliphoraPartial, DefaultPixelType)]
-        public void ApplyDiffusionFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(CommonTestImages), nameof(OrderedDitherers), PixelTypes.Rgba32)]
+        public void DitherFilter_WorksWithAllDitherers<TPixel>(
+            TestImageProvider<TPixel> provider,
+            IOrderedDither ditherer)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
+            using (Image<TPixel> image = provider.GetImage())
             {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, .5F, bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
+                image.Mutate(x => x.Dither(ditherer));
+                image.DebugSave(provider, ditherer.GetType().Name);
             }
         }
     }

From 6285ef69eea7b388db2fb74d540bd4ad2a978656 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 17:49:28 +0200
Subject: [PATCH 116/223] extended diffusion + dither tests

---
 .../Processors/Dithering/DitherTests.cs       | 66 +++++++------------
 tests/Images/External                         |  2 +-
 2 files changed, 26 insertions(+), 42 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
index fbe7bb1822..368feefb91 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Dithering;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
@@ -39,6 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
                                                                                      KnownDitherers.OrderedDither3x3,
                                                                                      KnownDitherers.BayerDither2x2
                                                                                  };
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.05f);
         
         private static IOrderedDither DefaultDitherer => KnownDitherers.BayerDither4x4;
 
@@ -49,16 +51,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void ApplyDiffusionFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, .5F, bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => x.Diffuse(DefaultErrorDiffuser, .5F, rect),
+                comparer: ValidatorComparer);
         }
 
         [Theory]
@@ -66,28 +61,19 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void ApplyDitherFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Dither(DefaultDitherer, bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => x.Dither(DefaultDitherer, rect),
+                comparer: ValidatorComparer);
         }
 
         [Theory]
         [WithFile(TestImages.Png.Filter0, CommonNonDefaultPixelTypes)]
-            public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
+        public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Diffuse(DefaultErrorDiffuser, 0.5f));
-                image.DebugSave(provider);
-            }
+            // Increased tolerance because of compatibility issues on .NET 4.6.2:
+            var comparer = ImageComparer.TolerantPercentage(1f);
+            provider.RunValidatingProcessorTest(x => x.Diffuse(DefaultErrorDiffuser, 0.5f), comparer: comparer);
         }
 
         [Theory]
@@ -97,11 +83,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
             IErrorDiffuser diffuser)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Diffuse(diffuser, .5F));
-                image.DebugSave(provider, diffuser.GetType().Name);
-            }
+            provider.RunValidatingProcessorTest(
+                x => x.Diffuse(diffuser, 0.5f),
+                testOutputDetails: diffuser.GetType().Name,
+                comparer: ValidatorComparer,
+                appendPixelTypeToFileName: false);
         }
 
         [Theory]
@@ -109,11 +95,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void DitherFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Dither(DefaultDitherer));
-                image.DebugSave(provider);
-            }
+            provider.RunValidatingProcessorTest(
+                x => x.Dither(DefaultDitherer),
+                comparer: ValidatorComparer);
         }
 
         [Theory]
@@ -123,11 +107,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
             IOrderedDither ditherer)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Dither(ditherer));
-                image.DebugSave(provider, ditherer.GetType().Name);
-            }
+            provider.RunValidatingProcessorTest(
+                x => x.Dither(ditherer),
+                testOutputDetails: ditherer.GetType().Name,
+                comparer: ValidatorComparer,
+                appendPixelTypeToFileName: false);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 2a3247c6da..0c524009f4 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 2a3247c6da18b8a96cc71e1f2862ac03f2a42315
+Subproject commit 0c524009f4d4b0edefddd944defdc408c3971536

From 6015c2af6b8604fdb75665b92815ecc8ada7b2af Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 4 May 2019 18:42:07 +0200
Subject: [PATCH 117/223] Add additional pixel conversion tests

---
 .../PixelFormats/Bgr565Tests.cs               | 165 ++++++++++++++++++
 .../PixelFormats/Bgra4444Tests.cs             | 160 +++++++++++++++++
 .../PixelFormats/Bgra5551Tests.cs             |  75 +++++++-
 .../PixelFormats/Byte4Tests.cs                | 148 +++++++++++++++-
 .../PixelFormats/Rgba1010102Tests.cs          | 128 ++++++++++++++
 5 files changed, 672 insertions(+), 4 deletions(-)

diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
index 4419fe898a..03e9054667 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -9,6 +10,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Bgr565Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Bgr565(0.0f, 0.0f, 0.0f);
+            var color2 = new Bgr565(new Vector3(0.0f));
+            var color3 = new Bgr565(new Vector3(1.0f, 0.0f, 1.0f));
+            var color4 = new Bgr565(1.0f, 0.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Bgr565(0.0f, 0.0f, 0.0f);
+            var color2 = new Bgr565(new Vector3(1.0f));
+            var color3 = new Bgr565(new Vector3(1.0f, 0.0f, 0.0f));
+            var color4 = new Bgr565(1.0f, 1.0f, 0.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void Bgr565_PackedValue()
         {
@@ -77,6 +108,140 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, bgr.PackedValue);
         }
 
+        [Fact]
+        public void Bgr565_FromArgb32()
+        {
+            // arrange
+            var bgr1 = default(Bgr565);
+            var bgr2 = default(Bgr565);
+            ushort expected1 = ushort.MaxValue;
+            ushort expected2 = ushort.MaxValue;
+
+            // act
+            bgr1.FromArgb32(new Argb32(1.0f, 1.0f, 1.0f, 1.0f));
+            bgr2.FromArgb32(new Argb32(1.0f, 1.0f, 1.0f, 0.0f));
+
+            // assert
+            Assert.Equal(expected1, bgr1.PackedValue);
+            Assert.Equal(expected2, bgr2.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_FromRgba32()
+        {
+            // arrange
+            var bgr1 = default(Bgr565);
+            var bgr2 = default(Bgr565);
+            ushort expected1 = ushort.MaxValue;
+            ushort expected2 = ushort.MaxValue;
+
+            // act
+            bgr1.FromRgba32(new Rgba32(1.0f, 1.0f, 1.0f, 1.0f));
+            bgr2.FromRgba32(new Rgba32(1.0f, 1.0f, 1.0f, 0.0f));
+
+            // assert
+            Assert.Equal(expected1, bgr1.PackedValue);
+            Assert.Equal(expected2, bgr2.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_ToRgba32()
+        {
+            // arrange
+            var bgra = new Bgr565(Vector3.One);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            bgra.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
+
+        [Fact]
+        public void Bgra565_FromRgb48()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgr.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgr.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra565_FromRgba64()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgr.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgr.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_FromBgr24()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expected = ushort.MaxValue;
+            
+            // act
+            bgr.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+            
+            // assert
+            Assert.Equal(expected, bgr.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_FromRgb24()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            bgr.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, bgr.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_FromGrey8()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            bgr.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, bgr.PackedValue);
+        }
+
+        [Fact]
+        public void Bgr565_FromGrey16()
+        {
+            // arrange
+            var bgr = default(Bgr565);
+            ushort expected = ushort.MaxValue;
+
+            // act
+            bgr.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, bgr.PackedValue);
+        }
+
         [Fact]
         public void Bgr565_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
index b6019016c8..d4c9986252 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra4444Tests.cs
@@ -9,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Bgra4444Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Bgra4444(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Bgra4444(new Vector4(0.0f));
+            var color3 = new Bgra4444(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new Bgra4444(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Bgra4444(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Bgra4444(new Vector4(1.0f));
+            var color3 = new Bgra4444(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Bgra4444(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void Bgra4444_PackedValue()
         {
@@ -48,6 +78,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(1, actual.W);
         }
 
+        [Fact]
+        public void Bgra4444_ToRgba32()
+        {
+            // arrange
+            var bgra = new Bgra4444(Vector4.One);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            bgra.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void Bgra4444_FromScaledVector4()
         {
@@ -78,6 +122,122 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, bgra.PackedValue);
         }
 
+        [Fact]
+        public void Bgra4444_FromArgb32()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromArgb32(new Argb32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromRgba32()
+        {
+            // arrange
+            var bgra1 = default(Bgra4444);
+            var bgra2 = default(Bgra4444);
+            ushort expectedPackedValue1 = ushort.MaxValue;
+            ushort expectedPackedValue2 = 0xFF0F;
+
+            // act
+            bgra1.FromRgba32(new Rgba32(255, 255, 255, 255));
+            bgra2.FromRgba32(new Rgba32(255, 0, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue1, bgra1.PackedValue);
+            Assert.Equal(expectedPackedValue2, bgra2.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromRgb48()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromRgba64()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromGrey16()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromGrey8()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromBgr24()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
+        [Fact]
+        public void Bgra4444_FromRgb24()
+        {
+            // arrange
+            var bgra = default(Bgra4444);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
         [Fact]
         public void Bgra4444_Clamping()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
index f5abca59a1..7751d7ab93 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra5551Tests.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -10,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Bgra5551Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Bgra5551(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Bgra5551(new Vector4(0.0f));
+            var color3 = new Bgra5551(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Bgra5551(1.0f, 0.0f, 0.0f, 1.0f);
+            
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Bgra5551(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Bgra5551(new Vector4(1.0f));
+            var color3 = new Bgra5551(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Bgra5551(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void Bgra5551_PackedValue()
         {
@@ -54,6 +83,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(1, actual.W);
         }
 
+        [Fact]
+        public void Bgra5551_ToRgba32()
+        {
+            // arrange
+            var bgra = new Bgra5551(Vector4.One);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            bgra.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void Bgra5551_FromScaledVector4()
         {
@@ -70,6 +113,22 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Bgra5551_FromBgra5551()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            var actual = default(Bgra5551);
+            var expected = new Bgra5551(1.0f, 0.0f, 1.0f, 1.0f);
+
+            // act 
+            bgra.FromBgra5551(expected);
+            actual.FromBgra5551(bgra);
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void Bgra5551_FromRgba32()
         {
@@ -120,6 +179,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expectedPackedValue, bgra.PackedValue);
         }
 
+        [Fact]
+        public void Bgra5551_FromRgb48()
+        {
+            // arrange
+            var bgra = default(Bgra5551);
+            ushort expectedPackedValue = ushort.MaxValue;
+
+            // act
+            bgra.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, bgra.PackedValue);
+        }
+
         [Fact]
         public void Bgra5551_FromRgba64()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
index 9174a6abdb..ce9e56317e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
@@ -9,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Byte4Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Byte4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Byte4(new Vector4(0.0f));
+            var color3 = new Byte4(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new Byte4(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Byte4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Byte4(new Vector4(1.0f));
+            var color3 = new Byte4(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Byte4(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void Byte4_PackedValue()
         {
@@ -61,18 +91,130 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Byte4_FromArgb32()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromArgb32(new Argb32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromBgr24()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromGrey8()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromGrey16()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromRgb24()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
         [Fact]
         public void Byte4_FromBgra5551()
         {
             // arrange
-            var rgb = default(Byte4);
+            var byte4 = default(Byte4);
             uint expected = 0xFFFFFFFF;
 
             // act
-            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+            byte4.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromRgba32()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue1 = uint.MaxValue;
+            
+            // act
+            byte4.FromRgba32(new Rgba32(255, 255, 255, 255));
+            
+            // assert
+            Assert.Equal(expectedPackedValue1, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromRgb48()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
+        }
+
+        [Fact]
+        public void Byte4_FromRgba64()
+        {
+            // arrange
+            var byte4 = default(Byte4);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            byte4.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
 
             // assert
-            Assert.Equal(expected, rgb.PackedValue);
+            Assert.Equal(expectedPackedValue, byte4.PackedValue);
         }
 
         [Fact]
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
index 0dbed2d2cb..19a5d4b22e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
@@ -9,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Rgba1010102Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Rgba1010102(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Rgba1010102(new Vector4(0.0f));
+            var color3 = new Rgba1010102(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new Rgba1010102(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Rgba1010102(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Rgba1010102(new Vector4(1.0f));
+            var color3 = new Rgba1010102(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Rgba1010102(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void Rgba1010102_PackedValue()
         {
@@ -78,6 +108,104 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, rgba.PackedValue);
         }
 
+        [Fact]
+        public void Rgba1010102_FromArgb32()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromArgb32(new Argb32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromBgr24()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromGrey8()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromGrey16()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromRgb24()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromRgb48()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
+        [Fact]
+        public void Rgba1010102_FromRgba64()
+        {
+            // arrange
+            var rgba = default(Rgba1010102);
+            uint expectedPackedValue = uint.MaxValue;
+
+            // act
+            rgba.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expectedPackedValue, rgba.PackedValue);
+        }
+
         [Fact]
         public void Rgba1010102_Clamping()
         {

From a96423ddc5ecbb0859fa5059b1e2fee9e748246d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 19:05:08 +0200
Subject: [PATCH 118/223] validating tests for Effects

---
 .../Processors/Effects/BackgroundColorTest.cs | 35 ++++------
 .../Processors/Effects/OilPaintTest.cs        | 42 +++++------
 .../Processors/Effects/PixelateTest.cs        | 70 +++----------------
 tests/Images/External                         |  2 +-
 4 files changed, 47 insertions(+), 102 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
index 792c7b0802..d7f77c9565 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
@@ -10,35 +10,30 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
 {
-    public class BackgroundColorTest : FileTestBase
+    [GroupOutput("Effects")]
+    public class BackgroundColorTest
     {
+        public static readonly string[] InputImages =
+            {
+                TestImages.Png.Splash,
+                TestImages.Png.Ducky
+            };
+        
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyBackgroundColorFilter<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(InputImages), PixelTypes.Rgba32)]
+        public void FullImage<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.BackgroundColor(NamedColors<TPixel>.HotPink));
-                image.DebugSave(provider);
-            }
+            provider.RunValidatingProcessorTest(x =>  x.BackgroundColor(NamedColors<TPixel>.HotPink));
         }
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyBackgroundColorFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(InputImages), PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.BackgroundColor(NamedColors<TPixel>.HotPink, bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => x.BackgroundColor(NamedColors<TPixel>.HotPink, rect));
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Effects/OilPaintTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Effects/OilPaintTest.cs
index d4429aaf3d..ea2273cd5d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Effects/OilPaintTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Effects/OilPaintTest.cs
@@ -10,40 +10,40 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
 {
-    public class OilPaintTest : FileTestBase
+    [GroupOutput("Effects")]
+    public class OilPaintTest
     {
         public static readonly TheoryData<int, int> OilPaintValues = new TheoryData<int, int>
                                                                          {
-                                                                             { 15, 10 }, { 6, 5 }
+                                                                             { 15, 10 }, 
+                                                                             { 6, 5 }
                                                                          };
+        public static readonly string[] InputImages =
+            {
+                TestImages.Png.CalliphoraPartial,
+                TestImages.Bmp.Car
+            };
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(OilPaintValues), DefaultPixelType)]
-        public void ApplyOilPaintFilter<TPixel>(TestImageProvider<TPixel> provider, int levels, int brushSize)
+        [WithFileCollection(nameof(InputImages), nameof(OilPaintValues), PixelTypes.Rgba32)]
+        public void FullImage<TPixel>(TestImageProvider<TPixel> provider, int levels, int brushSize)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.OilPaint(levels, brushSize));
-                image.DebugSave(provider, string.Join("-", levels, brushSize));
-            }
+            provider.RunValidatingProcessorTest(
+                x => x.OilPaint(levels, brushSize),
+                $"{levels}-{brushSize}",
+                appendPixelTypeToFileName: false);
         }
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(OilPaintValues), DefaultPixelType)]
-        public void ApplyOilPaintFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int levels, int brushSize)
+        [WithFileCollection(nameof(InputImages), nameof(OilPaintValues), PixelTypes.Rgba32)]
+        [WithTestPatternImages(nameof(OilPaintValues), 100, 100, PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider, int levels, int brushSize)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.OilPaint(levels, brushSize, bounds));
-                image.DebugSave(provider, string.Join("-", levels, brushSize));
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            provider.RunRectangleConstrainedValidatingProcessorTest(
+                (x, rect) => x.OilPaint(levels, brushSize, rect),
+                $"{levels}-{brushSize}");
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Effects/PixelateTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Effects/PixelateTest.cs
index cb9a0ba0cf..726f4b707b 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Effects/PixelateTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Effects/PixelateTest.cs
@@ -4,82 +4,32 @@
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-
 using SixLabors.Primitives;
+
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
 {
-    public class PixelateTest : FileTestBase
+    [GroupOutput("Effects")]
+    public class PixelateTest
     {
-        public static readonly TheoryData<int> PixelateValues
-        = new TheoryData<int>
-        {
-            4 ,
-            8
-        };
+        public static readonly TheoryData<int> PixelateValues = new TheoryData<int> { 4, 8 };
 
         [Theory]
-        [WithTestPatternImages(nameof(PixelateValues), 320, 240, PixelTypes.Rgba32)]
-        public void ImageShouldApplyPixelateFilter<TPixel>(TestImageProvider<TPixel> provider, int value)
+        [WithFile(TestImages.Png.Ducky, nameof(PixelateValues), PixelTypes.Rgba32)]
+        public void FullImage<TPixel>(TestImageProvider<TPixel> provider, int value)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Pixelate(value));
-                image.DebugSave(provider, value);
-
-                // Test the neigbouring pixels
-                for (int y = 0; y < image.Height; y += value)
-                {
-                    for (int x = 0; x < image.Width; x += value)
-                    {
-                        TPixel source = image[x, y];
-                        for (int pixY = y; pixY < y + value && pixY < image.Height; pixY++)
-                        {
-                            for (int pixX = x; pixX < x + value && pixX < image.Width; pixX++)
-                            {
-                                Assert.Equal(source, image[pixX, pixY]);
-                            }
-                        }
-                    }
-                }
-            }
+            provider.RunValidatingProcessorTest(x => x.Pixelate(value), value, appendPixelTypeToFileName: false);
         }
 
         [Theory]
         [WithTestPatternImages(nameof(PixelateValues), 320, 240, PixelTypes.Rgba32)]
-        public void ImageShouldApplyPixelateFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
+        [WithFile(TestImages.Png.CalliphoraPartial, nameof(PixelateValues), PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider, int value)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Pixelate(value, bounds));
-                image.DebugSave(provider, value);
-
-                for (int y = 0; y < image.Height; y++)
-                {
-                    for (int x = 0; x < image.Width; x++)
-                    {
-                        int tx = x;
-                        int ty = y;
-                        TPixel sourceColor = source[tx, ty];
-                        if (bounds.Contains(tx, ty))
-                        {
-                            int sourceX = tx - ((tx - bounds.Left) % value) + (value / 2);
-                            int sourceY = ty - ((ty - bounds.Top) % value) + (value / 2);
-
-                            sourceColor = image[sourceX, sourceY];
-                        }
-                        Assert.Equal(sourceColor, image[tx, ty]);
-                    }
-                }
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            provider.RunRectangleConstrainedValidatingProcessorTest((x, rect) => x.Pixelate(value, rect), value);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 0c524009f4..50de3b9869 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 0c524009f4d4b0edefddd944defdc408c3971536
+Subproject commit 50de3b98694f20c9307d4d7cdac870f5820823c8

From 316c87a1705b877b5e67450c24d1fa1e7e2413bf Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 19:42:44 +0200
Subject: [PATCH 119/223] validating tests for AutoOrient

---
 .../Processors/Transforms/AutoOrientTests.cs  | 58 +++++++++++--------
 tests/Images/External                         |  2 +-
 2 files changed, 34 insertions(+), 26 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
index 28b01061ea..6dc9b36309 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/AutoOrientTests.cs
@@ -6,27 +6,16 @@ using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
-    public class AutoOrientTests : FileTestBase
+    [GroupOutput("Transforms")]
+    public class AutoOrientTests
     {
-        public static readonly string[] FlipFiles = { TestImages.Bmp.F };
-
-        public static readonly TheoryData<RotateMode, FlipMode, ushort> OrientationValues
-            = new TheoryData<RotateMode, FlipMode, ushort>
-        {
-            { RotateMode.None,      FlipMode.None,       0 },
-            { RotateMode.None,      FlipMode.None,       1 },
-            { RotateMode.None,      FlipMode.Horizontal, 2 },
-            { RotateMode.Rotate180, FlipMode.None,       3 },
-            { RotateMode.Rotate180, FlipMode.Horizontal, 4 },
-            { RotateMode.Rotate90,  FlipMode.Horizontal, 5 },
-            { RotateMode.Rotate270, FlipMode.None,       6 },
-            { RotateMode.Rotate90,  FlipMode.Vertical,   7 },
-            { RotateMode.Rotate90,  FlipMode.None,       8 },
-        };
+        public const string FlipTestFile = TestImages.Bmp.F;
 
         public static readonly TheoryData<ExifDataType, byte[]> InvalidOrientationValues
             = new TheoryData<ExifDataType, byte[]>
@@ -38,27 +27,38 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             { ExifDataType.SignedLong, BitConverter.GetBytes((int) 5) }
         };
 
+        public static readonly TheoryData<ushort> ExifOrientationValues = new TheoryData<ushort>()
+                                                                              {
+                                                                                  0,
+                                                                                  1,
+                                                                                  2,
+                                                                                  3,
+                                                                                  4,
+                                                                                  5,
+                                                                                  6,
+                                                                                  7,
+                                                                                  8
+                                                                              };
+
         [Theory]
-        [WithFileCollection(nameof(FlipFiles), nameof(OrientationValues), DefaultPixelType)]
-        public void ImageShouldAutoRotate<TPixel>(TestImageProvider<TPixel> provider, RotateMode rotateType, FlipMode flipType, ushort orientation)
+        [WithFile(FlipTestFile, nameof(ExifOrientationValues), PixelTypes.Rgba32)]
+        public void AutoOrient_WorksForAllExifOrientations<TPixel>(TestImageProvider<TPixel> provider, ushort orientation)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
             {
                 image.Metadata.ExifProfile = new ExifProfile();
                 image.Metadata.ExifProfile.SetValue(ExifTag.Orientation, orientation);
-
-                image.Mutate(x => x.RotateFlip(rotateType, flipType));
-                image.DebugSave(provider, string.Join("_", rotateType, flipType, orientation, "1_before"));
-
+                
                 image.Mutate(x => x.AutoOrient());
-                image.DebugSave(provider, string.Join("_", rotateType, flipType, orientation, "2_after"));
+                image.DebugSave(provider, orientation, appendPixelTypeToFileName: false);
+                image.CompareToReferenceOutput(provider, orientation, appendPixelTypeToFileName: false);
             }
         }
 
         [Theory]
-        [WithFileCollection(nameof(FlipFiles), nameof(InvalidOrientationValues), DefaultPixelType)]
-        public void ImageShouldAutoRotateInvalidValues<TPixel>(TestImageProvider<TPixel> provider, ExifDataType dataType, byte[] orientation)
+        [WithFile(FlipTestFile, nameof(InvalidOrientationValues), PixelTypes.Rgba32)]
+        public void AutoOrient_WorksWithCorruptExifData<TPixel>(TestImageProvider<TPixel> provider, ExifDataType dataType, byte[] orientation)
             where TPixel : struct, IPixel<TPixel>
         {
             var profile = new ExifProfile();
@@ -72,11 +72,19 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             bytes[18] = (byte)dataType;
             // Change the number of components
             bytes[20] = 1;
+            
+            byte[] orientationCodeData = new byte[8];
+            Array.Copy(orientation, orientationCodeData, orientation.Length);
+
+            ulong orientationCode = BitConverter.ToUInt64(orientationCodeData, 0);
 
             using (Image<TPixel> image = provider.GetImage())
+            using (Image<TPixel> reference = image.Clone())
             {
                 image.Metadata.ExifProfile = new ExifProfile(bytes);
                 image.Mutate(x => x.AutoOrient());
+                image.DebugSave(provider, $"{dataType}-{orientationCode}", appendPixelTypeToFileName: false);
+                ImageComparer.Exact.VerifySimilarity(image, reference);
             }
         }
     }
diff --git a/tests/Images/External b/tests/Images/External
index 50de3b9869..497dda8717 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 50de3b98694f20c9307d4d7cdac870f5820823c8
+Subproject commit 497dda87179af1dc323064140765f72b892116a3

From 8c2344794b49da56af5a58c9cba5053088656f7c Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 20:22:06 +0200
Subject: [PATCH 120/223] validating tests for Skew and Entropy crop

---
 .../Processors/Transforms/CropTest.cs         |  2 +-
 .../Processors/Transforms/EntropyCropTest.cs  | 27 ++++---
 .../Processors/Transforms/SkewTest.cs         | 72 -------------------
 .../Processors/Transforms/SkewTests.cs        | 67 +++++++++++++++++
 tests/Images/External                         |  2 +-
 5 files changed, 82 insertions(+), 88 deletions(-)
 delete mode 100644 tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTest.cs
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTests.cs

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/CropTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/CropTest.cs
index c01c3b1bd3..50217e892d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/CropTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/CropTest.cs
@@ -13,7 +13,7 @@ using Xunit;
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
     [GroupOutput("Transforms")]
-    public class CropTest : FileTestBase
+    public class CropTest
     {
         [Theory]
         [WithTestPatternImages(70, 30, PixelTypes.Rgba32, 0, 0, 70, 30)]
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/EntropyCropTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/EntropyCropTest.cs
index 7285270217..d20e6fa359 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/EntropyCropTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/EntropyCropTest.cs
@@ -7,25 +7,24 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
-    public class EntropyCropTest : FileTestBase
+    [GroupOutput("Transforms")]
+    public class EntropyCropTest
     {
-        public static readonly TheoryData<float> EntropyCropValues
-        = new TheoryData<float>
-        {
-            .25F,
-            .75F
-        };
+        public static readonly TheoryData<float> EntropyCropValues = new TheoryData<float> { .25F, .75F };
+
+        public static readonly string[] InputImages =
+            {
+                TestImages.Png.Ducky,
+                TestImages.Jpeg.Baseline.Jpeg400,
+                TestImages.Jpeg.Baseline.MultiScanBaselineCMYK
+            };
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(EntropyCropValues), DefaultPixelType)]
-        public void ImageShouldEntropyCrop<TPixel>(TestImageProvider<TPixel> provider, float value)
+        [WithFileCollection(nameof(InputImages), nameof(EntropyCropValues), PixelTypes.Rgba32)]
+        public void EntropyCrop<TPixel>(TestImageProvider<TPixel> provider, float value)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.EntropyCrop(value));
-                image.DebugSave(provider, value);
-            }
+            provider.RunValidatingProcessorTest(x => x.EntropyCrop(value), value, appendPixelTypeToFileName: false);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTest.cs
deleted file mode 100644
index 29c51543fc..0000000000
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTest.cs
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
-using SixLabors.ImageSharp.PixelFormats;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
-{
-    public class SkewTest : FileTestBase
-    {
-        public static readonly TheoryData<float, float> SkewValues
-            = new TheoryData<float, float>
-        {
-            { 20, 10 },
-            { -20, -10 }
-        };
-
-        public static readonly List<string> ResamplerNames
-            = new List<string>
-        {
-            nameof(KnownResamplers.Bicubic),
-            nameof(KnownResamplers.Box),
-            nameof(KnownResamplers.CatmullRom),
-            nameof(KnownResamplers.Hermite),
-            nameof(KnownResamplers.Lanczos2),
-            nameof(KnownResamplers.Lanczos3),
-            nameof(KnownResamplers.Lanczos5),
-            nameof(KnownResamplers.Lanczos8),
-            nameof(KnownResamplers.MitchellNetravali),
-            nameof(KnownResamplers.NearestNeighbor),
-            nameof(KnownResamplers.Robidoux),
-            nameof(KnownResamplers.RobidouxSharp),
-            nameof(KnownResamplers.Spline),
-            nameof(KnownResamplers.Triangle),
-            nameof(KnownResamplers.Welch),
-        };
-
-        [Theory]
-        [WithTestPatternImages(nameof(SkewValues), 100, 50, DefaultPixelType)]
-        public void ImageShouldSkew<TPixel>(TestImageProvider<TPixel> provider, float x, float y)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(i => i.Skew(x, y));
-                image.DebugSave(provider, string.Join("_", x, y));
-            }
-        }
-
-        [Theory]
-        [WithTestPatternImages(nameof(SkewValues), 100, 50, DefaultPixelType)]
-        public void ImageShouldSkewWithSampler<TPixel>(TestImageProvider<TPixel> provider, float x, float y)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            foreach (string resamplerName in ResamplerNames)
-            {
-                IResampler sampler = TestUtils.GetResampler(resamplerName);
-                using (Image<TPixel> image = provider.GetImage())
-                {
-                    image.Mutate(i => i.Skew(x, y, sampler));
-                    image.DebugSave(provider, string.Join("_", x, y, resamplerName));
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTests.cs
new file mode 100644
index 0000000000..ad77027f0f
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/SkewTests.cs
@@ -0,0 +1,67 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Transforms;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
+{
+    [GroupOutput("Transforms")]
+    public class SkewTests
+    {
+        private const PixelTypes CommonPixelTypes = PixelTypes.Bgra32 | PixelTypes.Rgb24;
+
+        public static readonly string[] ResamplerNames = new[]
+                                                             {
+                                                                 nameof(KnownResamplers.Bicubic),
+                                                                 nameof(KnownResamplers.Box),
+                                                                 nameof(KnownResamplers.CatmullRom),
+                                                                 nameof(KnownResamplers.Hermite),
+                                                                 nameof(KnownResamplers.Lanczos2),
+                                                                 nameof(KnownResamplers.Lanczos3),
+                                                                 nameof(KnownResamplers.Lanczos5),
+                                                                 nameof(KnownResamplers.Lanczos8),
+                                                                 nameof(KnownResamplers.MitchellNetravali),
+                                                                 nameof(KnownResamplers.NearestNeighbor),
+                                                                 nameof(KnownResamplers.Robidoux),
+                                                                 nameof(KnownResamplers.RobidouxSharp),
+                                                                 nameof(KnownResamplers.Spline),
+                                                                 nameof(KnownResamplers.Triangle),
+                                                                 nameof(KnownResamplers.Welch),
+                                                             };
+
+        public static readonly TheoryData<float, float> SkewValues = new TheoryData<float, float>
+                                                                         {
+                                                                             { 20, 10 },
+                                                                             { -20, -10 }
+                                                                         };
+
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.01f);
+
+        [Theory]
+        [WithTestPatternImages(nameof(SkewValues), 100, 50, CommonPixelTypes)]
+        public void Skew_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider, float x, float y)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.RunValidatingProcessorTest(ctx => ctx.Skew(x, y), $"{x}_{y}", ValidatorComparer);
+        }
+
+        [Theory]
+        [WithFile(TestImages.Png.Ducky, nameof(ResamplerNames), PixelTypes.Rgba32)]
+        public void Skew_WorksWithAllResamplers<TPixel>(TestImageProvider<TPixel> provider, string resamplerName)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            IResampler sampler = TestUtils.GetResampler(resamplerName);
+
+            provider.RunValidatingProcessorTest(
+                x => x.Skew(21, 32, sampler),
+                resamplerName,
+                comparer: ValidatorComparer,
+                appendPixelTypeToFileName: false);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 497dda8717..56ee5df145 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 497dda87179af1dc323064140765f72b892116a3
+Subproject commit 56ee5df145d9696e401e2bc53e615c553cfb32d5

From e9ce809e8d60a3e688cef28a4e0ddda1beb8126a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 20:57:30 +0200
Subject: [PATCH 121/223] validating tests for Overlay processors

---
 .../Processors/Overlays/GlowTest.cs           | 57 ++-------------
 .../Processors/Overlays/OverlayTestBase.cs    | 70 +++++++++++++++++++
 .../Processors/Overlays/VignetteTest.cs       | 61 ++--------------
 tests/Images/External                         |  2 +-
 4 files changed, 83 insertions(+), 107 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
index 479ee346a5..113c13b8ae 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
@@ -10,59 +10,14 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
 {
-    public class GlowTest : FileTestBase
+    [GroupOutput("Overlays")]
+    public class GlowTest : OverlayTestBase
     {
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyGlowFilter<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Glow());
-                image.DebugSave(provider);
-            }
-        }
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, T color) => ctx.Glow(color);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyGlowFilterColor<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Glow(NamedColors<TPixel>.Orange));
-                image.DebugSave(provider);
-            }
-        }
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY) =>
+            ctx.Glow(radiusX);
 
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyGlowFilterRadius<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Glow(image.Width / 4F));
-                image.DebugSave(provider);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyGlowFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Glow(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect) => ctx.Glow(rect);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
new file mode 100644
index 0000000000..d2abcd7312
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
@@ -0,0 +1,70 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Reflection;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
+{
+    [GroupOutput("Overlays")]
+    public abstract class OverlayTestBase
+    {
+        public static string[] ColorNames = { "Blue", "White" };
+
+        public static string[] InputImages = { TestImages.Png.Ducky, TestImages.Png.Splash };
+
+        private static readonly ImageComparer ValidatorComparer = ImageComparer.TolerantPercentage(0.05f);
+        
+        [Theory]
+        [WithFileCollection(nameof(InputImages), nameof(ColorNames), PixelTypes.Rgba32)]
+        public void FullImage_ApplyColor<TPixel>(TestImageProvider<TPixel> provider, string colorName)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            var f = (FieldInfo)typeof(NamedColors<TPixel>).GetMember(colorName)[0];
+            TPixel color = (TPixel)f.GetValue(null);
+
+            provider.RunValidatingProcessorTest(x => this.Apply(x, color), colorName, ValidatorComparer, appendPixelTypeToFileName: false);
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), PixelTypes.Rgba32)]
+        public void FullImage_ApplyRadius<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunValidatingProcessorTest(
+                x =>
+                    {
+                        Size size = x.GetCurrentSize();
+                        this.Apply(x, size.Width / 4f, size.Height / 4f);
+                    },
+                comparer: ValidatorComparer,
+                appendPixelTypeToFileName: false);
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(InputImages), PixelTypes.Rgba32)]
+        public void InBox<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            provider.Utility.TestGroupName = this.GetType().Name;
+            provider.RunRectangleConstrainedValidatingProcessorTest((x, rect) => this.Apply(x, rect));
+        }
+
+        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, T color)
+            where T : struct, IPixel<T>;
+        
+        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY)
+            where T : struct, IPixel<T>;
+        
+        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect)
+            where T : struct, IPixel<T>;
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
index 3a378a0951..ad04a827db 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
@@ -1,68 +1,19 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-
 using SixLabors.Primitives;
-using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
 {
-    public class VignetteTest : FileTestBase
+    [GroupOutput("Overlays")]
+    public class VignetteTest : OverlayTestBase
     {
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyVignetteFilter<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Vignette());
-                image.DebugSave(provider);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyVignetteFilterColor<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Vignette(NamedColors<TPixel>.Orange));
-                image.DebugSave(provider);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyVignetteFilterRadius<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                image.Mutate(x => x.Vignette(image.Width / 4F, image.Height / 4F));
-                image.DebugSave(provider);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
-        public void ImageShouldApplyVignetteFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (var image = source.Clone())
-            {
-                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, T color) => ctx.Vignette(color);
 
-                image.Mutate(x => x.Vignette(bounds));
-                image.DebugSave(provider);
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY) =>
+            ctx.Vignette(radiusX, radiusY);
 
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
+        protected override void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect) => ctx.Vignette(rect);
     }
 }
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 56ee5df145..854ba68b05 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 56ee5df145d9696e401e2bc53e615c553cfb32d5
+Subproject commit 854ba68b05162bdd87c0c9bbdcdb1c848aa6ddbe

From 65dc0ab53a6e053768089806b87638fe6504d26f Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 4 May 2019 21:05:25 +0200
Subject: [PATCH 122/223] Add more pixel conversion tests

---
 .../PixelImplementations/Byte4.cs             |   2 +-
 .../PixelFormats/Argb32Tests.cs               |  62 +++++++
 .../PixelFormats/Bgr24Tests.cs                |  18 ++
 .../PixelFormats/Bgr565Tests.cs               |   1 -
 .../PixelFormats/Bgra32Tests.cs               |  25 +++
 .../PixelFormats/Byte4Tests.cs                |  14 ++
 .../PixelFormats/Gray16Tests.cs               |  18 ++
 .../PixelFormats/Gray8Tests.cs                |  20 ++-
 .../PixelFormats/NormalizedByte4Tests.cs      | 156 ++++++++++++++++++
 .../PixelFormats/NormalizedShort4Tests.cs     | 156 ++++++++++++++++++
 .../PixelFormats/Rgba1010102Tests.cs          |  18 ++
 .../PixelFormats/RgbaVectorTests.cs           |  42 +++++
 12 files changed, 528 insertions(+), 4 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
index a07cd5213c..ab8a13c166 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Byte4.cs
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         public override string ToString()
         {
             var vector = this.ToVector4();
-            return FormattableString.Invariant($"Bgra5551({vector.X:#0.##}, {vector.Y:#0.##}, {vector.Z:#0.##}, {vector.W:#0.##})");
+            return FormattableString.Invariant($"Byte4({vector.X:#0.##}, {vector.Y:#0.##}, {vector.Z:#0.##}, {vector.W:#0.##})");
         }
 
         /// <summary>
diff --git a/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
index 4f3394e691..1ccf485fe0 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Argb32Tests.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -9,6 +10,67 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Argb32Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Argb32(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Argb32(new Vector4(0.0f));
+            var color3 = new Argb32(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new Argb32(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Argb32(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new Argb32(new Vector4(1.0f));
+            var color3 = new Argb32(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new Argb32(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests whether the color constructor correctly assign properties.
+        /// </summary>
+        [Fact]
+        public void ConstructorAssignsProperties()
+        {
+            var color1 = new Argb32(1, .1f, .133f, .864f);
+            Assert.Equal(255, color1.R);
+            Assert.Equal((byte)Math.Round(.1f * 255), color1.G);
+            Assert.Equal((byte)Math.Round(.133f * 255), color1.B);
+            Assert.Equal((byte)Math.Round(.864f * 255), color1.A);
+
+            var color2 = new Argb32(1, .1f, .133f);
+            Assert.Equal(255, color2.R);
+            Assert.Equal(Math.Round(.1f * 255), color2.G);
+            Assert.Equal(Math.Round(.133f * 255), color2.B);
+            Assert.Equal(255, color2.A);
+
+            var color4 = new Argb32(new Vector3(1, .1f, .133f));
+            Assert.Equal(255, color4.R);
+            Assert.Equal(Math.Round(.1f * 255), color4.G);
+            Assert.Equal(Math.Round(.133f * 255), color4.B);
+            Assert.Equal(255, color4.A);
+
+            var color5 = new Argb32(new Vector4(1, .1f, .133f, .5f));
+            Assert.Equal(255, color5.R);
+            Assert.Equal(Math.Round(.1f * 255), color5.G);
+            Assert.Equal(Math.Round(.133f * 255), color5.B);
+            Assert.Equal(Math.Round(.5f * 255), color5.A);
+        }
+
         [Fact]
         public void Argb32_PackedValue()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
index f145e6928e..0266704850 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgr24Tests.cs
@@ -9,6 +9,24 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Bgr24Tests
     {
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Bgr24(byte.MaxValue, 0, byte.MaxValue);
+            var color2 = new Bgr24(byte.MaxValue, 0, byte.MaxValue);
+            
+            Assert.Equal(color1, color2);
+        }
+
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Bgr24(byte.MaxValue, 0, 0);
+            var color2 = new Bgr24(byte.MaxValue, 0, byte.MaxValue);
+
+            Assert.NotEqual(color1, color2);
+        }
+
         public static readonly TheoryData<byte, byte, byte> ColorData =
             new TheoryData<byte, byte, byte>() { { 1, 2, 3 }, { 4, 5, 6 }, { 0, 255, 42 } };
 
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
index 03e9054667..ccefa85c1e 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgr565Tests.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
diff --git a/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
index 171a3dfa00..4c5de7ee91 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Bgra32Tests.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
@@ -9,6 +10,30 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Bgra32Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Bgra32(byte.MaxValue, byte.MaxValue, byte.MaxValue, byte.MaxValue);
+            var color2 = new Bgra32(byte.MaxValue, byte.MaxValue, byte.MaxValue);
+            
+            Assert.Equal(color1, color2);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Bgra32(0, 0, byte.MaxValue, byte.MaxValue);
+            var color2 = new Bgra32(byte.MaxValue, byte.MaxValue, byte.MaxValue);
+
+            Assert.NotEqual(color1, color2);
+        }
+
         public static readonly TheoryData<byte, byte, byte, byte> ColorData =
             new TheoryData<byte, byte, byte, byte>()
                 {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
index ce9e56317e..2dff656ac8 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Byte4Tests.cs
@@ -75,6 +75,20 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(1, actual.W);
         }
 
+        [Fact]
+        public void Byte4_ToRgba32()
+        {
+            // arrange
+            var byte4 = new Byte4(byte.MaxValue, byte.MaxValue, byte.MaxValue, byte.MaxValue);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            byte4.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void Byte4_FromScaledVector4()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
index 01b60832e2..8a0bd62c19 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Gray16Tests.cs
@@ -9,6 +9,24 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class Gray16Tests
     {
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Gray16(3000);
+            var color2 = new Gray16(3000);
+
+            Assert.Equal(color1, color2);
+        }
+
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Gray16(12345);
+            var color2 = new Gray16(54321);
+
+            Assert.NotEqual(color1, color2);
+        }
+
         [Theory]
         [InlineData(0)]
         [InlineData(65535)]
diff --git a/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
index 159f97cdee..74fd903ca9 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Gray8Tests.cs
@@ -1,10 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System.Diagnostics;
 using System.Numerics;
 
-using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.PixelFormats;
 using Xunit;
 
@@ -45,6 +43,24 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
         public void Gray8_PackedValue_EqualsInput(byte input)
             => Assert.Equal(input, new Gray8(input).PackedValue);
 
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new Gray8(100);
+            var color2 = new Gray8(100);
+            
+            Assert.Equal(color1, color2);
+        }
+
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new Gray8(100);
+            var color2 = new Gray8(200);
+
+            Assert.NotEqual(color1, color2);
+        }
+
         [Fact]
         public void Gray8_FromScaledVector4()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
index 1cb404a008..7687a7777c 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedByte4Tests.cs
@@ -9,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class NormalizedByte4Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new NormalizedByte4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new NormalizedByte4(new Vector4(0.0f));
+            var color3 = new NormalizedByte4(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new NormalizedByte4(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new NormalizedByte4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new NormalizedByte4(new Vector4(1.0f));
+            var color3 = new NormalizedByte4(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new NormalizedByte4(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void NormalizedByte4_PackedValues()
         {
@@ -61,6 +91,90 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void NormalizedByte4_FromArgb32()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromArgb32(new Argb32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromBgr24()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromGrey8()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromGrey16()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromRgb24()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromRgba32()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgba32(new Rgba32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
         [Fact]
         public void NormalizedByte4_FromBgra5551()
         {
@@ -74,5 +188,47 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, normalizedByte4.ToVector4());
         }
+
+        [Fact]
+        public void NormalizedByte4_FromRgb48()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_FromRgba64()
+        {
+            // arrange
+            var byte4 = default(NormalizedByte4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedByte4_ToRgba32()
+        {
+            // arrange
+            var byte4 = new NormalizedByte4(byte.MaxValue, byte.MaxValue, byte.MaxValue, byte.MaxValue);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            byte4.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
index cea7e3146e..b872e58b68 100644
--- a/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/NormalizedShort4Tests.cs
@@ -9,6 +9,36 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
     public class NormalizedShort4Tests
     {
+        /// <summary>
+        /// Tests the equality operators for equality.
+        /// </summary>
+        [Fact]
+        public void AreEqual()
+        {
+            var color1 = new NormalizedShort4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new NormalizedShort4(new Vector4(0.0f));
+            var color3 = new NormalizedShort4(new Vector4(1.0f, 0.0f, 1.0f, 1.0f));
+            var color4 = new NormalizedShort4(1.0f, 0.0f, 1.0f, 1.0f);
+
+            Assert.Equal(color1, color2);
+            Assert.Equal(color3, color4);
+        }
+
+        /// <summary>
+        /// Tests the equality operators for inequality.
+        /// </summary>
+        [Fact]
+        public void AreNotEqual()
+        {
+            var color1 = new NormalizedShort4(0.0f, 0.0f, 0.0f, 0.0f);
+            var color2 = new NormalizedShort4(new Vector4(1.0f));
+            var color3 = new NormalizedShort4(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
+            var color4 = new NormalizedShort4(1.0f, 1.0f, 0.0f, 1.0f);
+
+            Assert.NotEqual(color1, color2);
+            Assert.NotEqual(color3, color4);
+        }
+
         [Fact]
         public void NormalizedShort4_PackedValues()
         {
@@ -62,6 +92,132 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void NormalizedShort4_FromArgb32()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromArgb32(new Argb32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromBgr24()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromBgr24(new Bgr24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromGrey8()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromGrey16()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromRgb24()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgb24(new Rgb24(byte.MaxValue, byte.MaxValue, byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromRgba32()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgba32(new Rgba32(255, 255, 255, 255));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromRgb48()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgb48(new Rgb48(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_FromRgba64()
+        {
+            // arrange
+            var byte4 = default(NormalizedShort4);
+            Vector4 expected = Vector4.One;
+
+            // act
+            byte4.FromRgba64(new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, byte4.ToScaledVector4());
+        }
+
+        [Fact]
+        public void NormalizedShort4_ToRgba32()
+        {
+            // arrange
+            var byte4 = new NormalizedShort4(byte.MaxValue, byte.MaxValue, byte.MaxValue, byte.MaxValue);
+            var expected = new Rgba32(Vector4.One);
+            var actual = default(Rgba32);
+
+            // act
+            byte4.ToRgba32(ref actual);
+
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void NormalizedShort4_FromBgra5551()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
index 19a5d4b22e..3a28c82b7b 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba1010102Tests.cs
@@ -122,6 +122,24 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expectedPackedValue, rgba.PackedValue);
         }
 
+        [Fact]
+        public void Rgba1010102_FromRgba32()
+        {
+            // arrange
+            var rgba1 = default(Rgba1010102);
+            var rgba2 = default(Rgba1010102);
+            uint expectedPackedValue1 = uint.MaxValue;
+            uint expectedPackedValue2 = 0xFFF003FF;
+
+            // act
+            rgba1.FromRgba32(new Rgba32(255, 255, 255, 255));
+            rgba2.FromRgba32(new Rgba32(255, 0, 255, 255));
+
+            // assert
+            Assert.Equal(expectedPackedValue1, rgba1.PackedValue);
+            Assert.Equal(expectedPackedValue2, rgba2.PackedValue);
+        }
+
         [Fact]
         public void Rgba1010102_FromBgr24()
         {
diff --git a/tests/ImageSharp.Tests/PixelFormats/RgbaVectorTests.cs b/tests/ImageSharp.Tests/PixelFormats/RgbaVectorTests.cs
index e880e38517..570d72cf49 100644
--- a/tests/ImageSharp.Tests/PixelFormats/RgbaVectorTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/RgbaVectorTests.cs
@@ -146,5 +146,47 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+
+        [Fact]
+        public void RgbaVector_FromBgra5551()
+        {
+            // arrange
+            var rgb = default(RgbaVector);
+            Vector4 expected = Vector4.One;
+
+            // act
+            rgb.FromBgra5551(new Bgra5551(1.0f, 1.0f, 1.0f, 1.0f));
+
+            // assert
+            Assert.Equal(expected, rgb.ToScaledVector4());
+        }
+
+        [Fact]
+        public void RgbaVector_FromGrey16()
+        {
+            // arrange
+            var rgba = default(RgbaVector);
+            Vector4 expected = Vector4.One;
+
+            // act
+            rgba.FromGray16(new Gray16(ushort.MaxValue));
+
+            // assert
+            Assert.Equal(expected, rgba.ToScaledVector4());
+        }
+
+        [Fact]
+        public void RgbaVector_FromGrey8()
+        {
+            // arrange
+            var rgba = default(RgbaVector);
+            Vector4 expected = Vector4.One;
+
+            // act
+            rgba.FromGray8(new Gray8(byte.MaxValue));
+
+            // assert
+            Assert.Equal(expected, rgba.ToScaledVector4());
+        }
     }
 }
\ No newline at end of file

From 5afc44aa23afaabcd4c328d24223923b506bfe55 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 22:18:22 +0200
Subject: [PATCH 123/223] skip DitherTests on old 32 bit runtimes

---
 .../Processors/Dithering/DitherTests.cs       | 37 +++++++++++++++++++
 tests/Images/External                         |  2 +-
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
index 368feefb91..cb901c2a88 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
@@ -46,11 +46,23 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
 
         private static IErrorDiffuser DefaultErrorDiffuser => KnownDiffusers.Atkinson;
 
+        /// <summary>
+        /// The output is visually correct old 32bit runtime,
+        /// but it is very different because of floating point inaccuracies.
+        /// </summary>
+        private static readonly bool SkipAllDitherTests =
+            !TestEnvironment.Is64BitProcess && string.IsNullOrEmpty(TestEnvironment.NetCoreVersion);
+
         [Theory]
         [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]
         public void ApplyDiffusionFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             provider.RunRectangleConstrainedValidatingProcessorTest(
                 (x, rect) => x.Diffuse(DefaultErrorDiffuser, .5F, rect),
                 comparer: ValidatorComparer);
@@ -61,6 +73,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void ApplyDitherFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             provider.RunRectangleConstrainedValidatingProcessorTest(
                 (x, rect) => x.Dither(DefaultDitherer, rect),
                 comparer: ValidatorComparer);
@@ -71,6 +88,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             // Increased tolerance because of compatibility issues on .NET 4.6.2:
             var comparer = ImageComparer.TolerantPercentage(1f);
             provider.RunValidatingProcessorTest(x => x.Diffuse(DefaultErrorDiffuser, 0.5f), comparer: comparer);
@@ -83,6 +105,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
             IErrorDiffuser diffuser)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             provider.RunValidatingProcessorTest(
                 x => x.Diffuse(diffuser, 0.5f),
                 testOutputDetails: diffuser.GetType().Name,
@@ -95,6 +122,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         public void DitherFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             provider.RunValidatingProcessorTest(
                 x => x.Dither(DefaultDitherer),
                 comparer: ValidatorComparer);
@@ -107,6 +139,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
             IOrderedDither ditherer)
             where TPixel : struct, IPixel<TPixel>
         {
+            if (SkipAllDitherTests)
+            {
+                return;
+            }
+            
             provider.RunValidatingProcessorTest(
                 x => x.Dither(ditherer),
                 testOutputDetails: ditherer.GetType().Name,
diff --git a/tests/Images/External b/tests/Images/External
index 854ba68b05..c057090b44 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 854ba68b05162bdd87c0c9bbdcdb1c848aa6ddbe
+Subproject commit c057090b4402120a83a8efe251aa5b691db9c0dc

From 604a8008fb3ab9d0fe173dc20d61471a69d8474a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 23:16:11 +0200
Subject: [PATCH 124/223] refactor BoxBlur and GaussianBlur

---
 .../Processing/BoxBlurExtensions.cs           | 20 ++---
 .../Processing/GaussianBlurExtensions.cs      | 20 ++---
 .../Convolution/BoxBlurProcessor.cs           | 53 ++++--------
 .../Convolution/BoxBlurProcessor{TPixel}.cs   | 64 +++++++++++++++
 .../Convolution/GaussianBlurProcessor.cs      | 82 +++++++------------
 .../GaussianBlurProcessor{TPixel}.cs          | 79 ++++++++++++++++++
 .../Processing/Convolution/BoxBlurTest.cs     |  6 +-
 .../Convolution/GaussianBlurTest.cs           |  6 +-
 8 files changed, 210 insertions(+), 120 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Processing/BoxBlurExtensions.cs b/src/ImageSharp/Processing/BoxBlurExtensions.cs
index 624da239bb..bc6e06dd67 100644
--- a/src/ImageSharp/Processing/BoxBlurExtensions.cs
+++ b/src/ImageSharp/Processing/BoxBlurExtensions.cs
@@ -8,43 +8,37 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds box blurring extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds box blurring extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class BoxBlurExtensions
     {
         /// <summary>
         /// Applies a box blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BoxBlur<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BoxBlurProcessor<TPixel>());
+        public static IImageProcessingContext BoxBlur(this IImageProcessingContext source)
+            => source.ApplyProcessor(new BoxBlurProcessor());
 
         /// <summary>
         /// Applies a box blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radius">The 'radius' value representing the size of the area to sample.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BoxBlur<TPixel>(this IImageProcessingContext<TPixel> source, int radius)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BoxBlurProcessor<TPixel>(radius));
+        public static IImageProcessingContext BoxBlur(this IImageProcessingContext source, int radius)
+            => source.ApplyProcessor(new BoxBlurProcessor(radius));
 
         /// <summary>
         /// Applies a box blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radius">The 'radius' value representing the size of the area to sample.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BoxBlur<TPixel>(this IImageProcessingContext<TPixel> source, int radius, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BoxBlurProcessor<TPixel>(radius), rectangle);
+        public static IImageProcessingContext BoxBlur(this IImageProcessingContext source, int radius, Rectangle rectangle)
+            => source.ApplyProcessor(new BoxBlurProcessor(radius), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/GaussianBlurExtensions.cs b/src/ImageSharp/Processing/GaussianBlurExtensions.cs
index 165c4ce1a6..1dab054579 100644
--- a/src/ImageSharp/Processing/GaussianBlurExtensions.cs
+++ b/src/ImageSharp/Processing/GaussianBlurExtensions.cs
@@ -8,43 +8,37 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds Gaussian blurring extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds Gaussian blurring extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class GaussianBlurExtensions
     {
         /// <summary>
         /// Applies a Gaussian blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianBlur<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new GaussianBlurProcessor<TPixel>());
+        public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source)
+            => source.ApplyProcessor(new GaussianBlurProcessor());
 
         /// <summary>
         /// Applies a Gaussian blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianBlur<TPixel>(this IImageProcessingContext<TPixel> source, float sigma)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new GaussianBlurProcessor<TPixel>(sigma));
+        public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source, float sigma)
+            => source.ApplyProcessor(new GaussianBlurProcessor(sigma));
 
         /// <summary>
         /// Applies a Gaussian blur to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianBlur<TPixel>(this IImageProcessingContext<TPixel> source, float sigma, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new GaussianBlurProcessor<TPixel>(sigma), rectangle);
+        public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source, float sigma, Rectangle rectangle)
+            => source.ApplyProcessor(new GaussianBlurProcessor(sigma), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
index 3d5bdc42a7..bb37489e13 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
@@ -3,67 +3,48 @@
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies box blur processing to the image.
+    /// Defines a box blur processor of a given Radius.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BoxBlurProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class BoxBlurProcessor : IImageProcessor
     {
         /// <summary>
-        /// The maximum size of the kernel in either direction.
+        /// The default radius used by the parameterless constructor.
         /// </summary>
-        private readonly int kernelSize;
+        public const int DefaultRadius = 7;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BoxBlurProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BoxBlurProcessor"/> class.
         /// </summary>
         /// <param name="radius">
         /// The 'radius' value representing the size of the area to sample.
         /// </param>
-        public BoxBlurProcessor(int radius = 7)
+        public BoxBlurProcessor(int radius)
         {
             this.Radius = radius;
-            this.kernelSize = (radius * 2) + 1;
-            this.KernelX = this.CreateBoxKernel();
-            this.KernelY = this.KernelX.Transpose();
         }
 
         /// <summary>
-        /// Gets the Radius
+        /// Initializes a new instance of the <see cref="BoxBlurProcessor"/> class.
         /// </summary>
-        public int Radius { get; }
-
-        /// <summary>
-        /// Gets the horizontal gradient operator.
-        /// </summary>
-        public DenseMatrix<float> KernelX { get; }
+        public BoxBlurProcessor()
+            : this(DefaultRadius)
+        {
+        }
 
         /// <summary>
-        /// Gets the vertical gradient operator.
+        /// Gets the Radius.
         /// </summary>
-        public DenseMatrix<float> KernelY { get; }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
+        public int Radius { get; }
 
-        /// <summary>
-        /// Create a 1 dimensional Box kernel.
-        /// </summary>
-        /// <returns>The <see cref="DenseMatrix{T}"/></returns>
-        private DenseMatrix<float> CreateBoxKernel()
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            int size = this.kernelSize;
-            var kernel = new DenseMatrix<float>(size, 1);
-
-            kernel.Fill(1F / size);
-
-            return kernel;
+            return new BoxBlurProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
new file mode 100644
index 0000000000..ba092cb424
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
@@ -0,0 +1,64 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    /// <summary>
+    /// Applies box blur processing to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class BoxBlurProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly BoxBlurProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BoxBlurProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="BoxBlurProcessor"/> defining the processor parameters.</param>
+        public BoxBlurProcessor(BoxBlurProcessor definition)
+        {
+            this.definition = definition;
+            int kernelSize = (definition.Radius * 2) + 1;
+            this.KernelX = CreateBoxKernel(kernelSize);
+            this.KernelY = this.KernelX.Transpose();
+        }
+
+        /// <summary>
+        /// Gets the horizontal gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelX { get; }
+
+        /// <summary>
+        /// Gets the vertical gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelY { get; }
+
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration) =>
+            new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(
+                source,
+                sourceRectangle,
+                configuration);
+
+        /// <summary>
+        /// Create a 1 dimensional Box kernel.
+        /// </summary>
+        /// <param name="kernelSize">The maximum size of the kernel in either direction.</param>
+        /// <returns>The <see cref="DenseMatrix{T}"/>.</returns>
+        private static DenseMatrix<float> CreateBoxKernel(int kernelSize)
+        {
+            var kernel = new DenseMatrix<float>(kernelSize, 1);
+            kernel.Fill(1F / kernelSize);
+            return kernel;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
index 0fc822d57c..33e2ef955d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
@@ -4,35 +4,38 @@
 using System;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies Gaussian blur processing to the image.
+    /// Defines a gaussian blur processor with a (Sigma, Radius) pair.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GaussianBlurProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class GaussianBlurProcessor : IImageProcessor
     {
         /// <summary>
-        /// The maximum size of the kernel in either direction.
+        /// The default value for <see cref="Sigma"/>.
         /// </summary>
-        private readonly int kernelSize;
+        public const float DefaultSigma = 3f;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianBlurProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianBlurProcessor"/> class.
+        /// </summary>
+        public GaussianBlurProcessor()
+            : this(DefaultSigma, CalculateDefaultRadius(DefaultSigma))
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GaussianBlurProcessor"/> class.
         /// </summary>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
-        public GaussianBlurProcessor(float sigma = 3F)
-            : this(sigma, (int)MathF.Ceiling(sigma * 3))
+        public GaussianBlurProcessor(float sigma)
+            : this(sigma, CalculateDefaultRadius(sigma))
         {
-            // Kernel radius is calculated using the minimum viable value.
-            // http://chemaguerra.com/gaussian-filter-radius/
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianBlurProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianBlurProcessor"/> class.
         /// </summary>
         /// <param name="radius">
         /// The 'radius' value representing the size of the area to sample.
@@ -43,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianBlurProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianBlurProcessor"/> class.
         /// </summary>
         /// <param name="sigma">
         /// The 'sigma' value representing the weight of the blur.
@@ -54,10 +57,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </param>
         public GaussianBlurProcessor(float sigma, int radius)
         {
-            this.kernelSize = (radius * 2) + 1;
             this.Sigma = sigma;
-            this.KernelX = this.CreateGaussianKernel();
-            this.KernelY = this.KernelX.Transpose();
+            this.Radius = radius;
         }
 
         /// <summary>
@@ -66,47 +67,24 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public float Sigma { get; }
 
         /// <summary>
-        /// Gets the horizontal gradient operator.
-        /// </summary>
-        public DenseMatrix<float> KernelX { get; }
-
-        /// <summary>
-        /// Gets the vertical gradient operator.
+        /// Gets the radius defining the size of the area to sample.
         /// </summary>
-        public DenseMatrix<float> KernelY { get; }
+        public int Radius { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            return new GaussianBlurProcessor<TPixel>(this);
+        }
 
         /// <summary>
-        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
+        /// Kernel radius is calculated using the minimum viable value.
+        /// <see cref="http://chemaguerra.com/gaussian-filter-radius/"/>.
         /// </summary>
-        /// <returns>The <see cref="DenseMatrix{T}"/></returns>
-        private DenseMatrix<float> CreateGaussianKernel()
+        private static int CalculateDefaultRadius(float sigma)
         {
-            int size = this.kernelSize;
-            float weight = this.Sigma;
-            var kernel = new DenseMatrix<float>(size, 1);
-
-            float sum = 0F;
-            float midpoint = (size - 1) / 2F;
-
-            for (int i = 0; i < size; i++)
-            {
-                float x = i - midpoint;
-                float gx = ImageMaths.Gaussian(x, weight);
-                sum += gx;
-                kernel[0, i] = gx;
-            }
-
-            // Normalize kernel so that the sum of all weights equals 1
-            for (int i = 0; i < size; i++)
-            {
-                kernel[0, i] /= sum;
-            }
-
-            return kernel;
+            return (int)MathF.Ceiling(sigma * 3);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs
new file mode 100644
index 0000000000..9b60fb2d2e
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs
@@ -0,0 +1,79 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    /// <summary>
+    /// Applies Gaussian blur processing to an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class GaussianBlurProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly GaussianBlurProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GaussianBlurProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="GaussianBlurProcessor"/> defining the processor parameters.</param>
+        public GaussianBlurProcessor(GaussianBlurProcessor definition)
+        {
+            this.definition = definition;
+            int kernelSize = (definition.Radius * 2) + 1;
+            this.KernelX = CreateGaussianKernel(kernelSize, definition.Sigma);
+            this.KernelY = this.KernelX.Transpose();
+        }
+
+        /// <summary>
+        /// Gets the horizontal gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelX { get; }
+
+        /// <summary>
+        /// Gets the vertical gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelY { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration) =>
+            new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(
+                source,
+                sourceRectangle,
+                configuration);
+
+        /// <summary>
+        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
+        /// </summary>
+        /// <returns>The <see cref="DenseMatrix{T}"/></returns>
+        private static DenseMatrix<float> CreateGaussianKernel(int size, float weight)
+        {
+            var kernel = new DenseMatrix<float>(size, 1);
+
+            float sum = 0F;
+            float midpoint = (size - 1) / 2F;
+
+            for (int i = 0; i < size; i++)
+            {
+                float x = i - midpoint;
+                float gx = ImageMaths.Gaussian(x, weight);
+                sum += gx;
+                kernel[0, i] = gx;
+            }
+
+            // Normalize kernel so that the sum of all weights equals 1
+            for (int i = 0; i < size; i++)
+            {
+                kernel[0, i] /= sum;
+            }
+
+            return kernel;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Convolution/BoxBlurTest.cs b/tests/ImageSharp.Tests/Processing/Convolution/BoxBlurTest.cs
index e425b63151..8c659848fc 100644
--- a/tests/ImageSharp.Tests/Processing/Convolution/BoxBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Convolution/BoxBlurTest.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void BoxBlur_BoxBlurProcessorDefaultsSet()
         {
             this.operations.BoxBlur();
-            var processor = this.Verify<BoxBlurProcessor<Rgba32>>();
+            var processor = this.Verify<BoxBlurProcessor>();
 
             Assert.Equal(7, processor.Radius);
         }
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void BoxBlur_amount_BoxBlurProcessorDefaultsSet()
         {
             this.operations.BoxBlur(34);
-            var processor = this.Verify<BoxBlurProcessor<Rgba32>>();
+            var processor = this.Verify<BoxBlurProcessor>();
 
             Assert.Equal(34, processor.Radius);
         }
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void BoxBlur_amount_rect_BoxBlurProcessorDefaultsSet()
         {
             this.operations.BoxBlur(5, this.rect);
-            var processor = this.Verify<BoxBlurProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<BoxBlurProcessor>(this.rect);
 
             Assert.Equal(5, processor.Radius);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Convolution/GaussianBlurTest.cs b/tests/ImageSharp.Tests/Processing/Convolution/GaussianBlurTest.cs
index c87a834eb6..0f64ebbeb4 100644
--- a/tests/ImageSharp.Tests/Processing/Convolution/GaussianBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Convolution/GaussianBlurTest.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianBlur_GaussianBlurProcessorDefaultsSet()
         {
             this.operations.GaussianBlur();
-            var processor = this.Verify<GaussianBlurProcessor<Rgba32>>();
+            var processor = this.Verify<GaussianBlurProcessor>();
 
             Assert.Equal(3f, processor.Sigma);
         }
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianBlur_amount_GaussianBlurProcessorDefaultsSet()
         {
             this.operations.GaussianBlur(0.2f);
-            var processor = this.Verify<GaussianBlurProcessor<Rgba32>>();
+            var processor = this.Verify<GaussianBlurProcessor>();
 
             Assert.Equal(.2f, processor.Sigma);
         }
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianBlur_amount_rect_GaussianBlurProcessorDefaultsSet()
         {
             this.operations.GaussianBlur(0.6f, this.rect);
-            var processor = this.Verify<GaussianBlurProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<GaussianBlurProcessor>(this.rect);
 
             Assert.Equal(.6f, processor.Sigma);
         }

From 5fc4374fd9d0645fb7b808b2858321c3c6ce51d8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 23:27:28 +0200
Subject: [PATCH 125/223] making filters public

---
 .../Filters/AchromatomalyProcessor.cs         |  2 +-
 .../Filters/AchromatopsiaProcessor.cs         |  2 +-
 .../Processors/Filters/BlackWhiteProcessor.cs |  4 +-
 .../Processors/Filters/BrightnessProcessor.cs |  2 +-
 .../Processors/Filters/ContrastProcessor.cs   |  4 +-
 .../Filters/DeuteranomalyProcessor.cs         |  2 +-
 .../Filters/DeuteranopiaProcessor.cs          |  2 +-
 .../Processors/Filters/FilterProcessor.cs     |  4 +-
 .../Filters/GrayscaleBt601Processor.cs        |  2 +-
 .../Filters/GrayscaleBt709Processor.cs        |  2 +-
 .../Processors/Filters/HueProcessor.cs        |  2 +-
 .../Processors/Filters/InvertProcessor.cs     |  2 +-
 .../Processors/Filters/KodachromeProcessor.cs |  2 +-
 .../Processors/Filters/LomographProcessor.cs  |  3 +-
 .../Filters/LomographProcessor{TPixel}.cs     |  4 ++
 .../Processors/Filters/OpacityProcessor.cs    |  4 +-
 .../Filters/PolaroidProcessor{TPixel}.cs      |  6 +-
 .../Filters/ProtanomalyProcessor.cs           |  2 +-
 .../Processors/Filters/ProtanopiaProcessor.cs |  2 +-
 .../Processors/Filters/SaturateProcessor.cs   |  2 +-
 .../Processors/Filters/SepiaProcessor.cs      |  2 +-
 .../Filters/TritanomalyProcessor.cs           |  2 +-
 .../Processors/Filters/TritanopiaProcessor.cs |  2 +-
 .../Processing/Processors/IImageProcessor.cs  | 56 +------------------
 .../Processors/IImageProcessor{TPixel}.cs     | 31 ++++++++++
 .../Processors/ImageProcessorExtensions.cs    | 37 ++++++++++++
 26 files changed, 106 insertions(+), 79 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs

diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
index 2dac6b827d..7c3789c388 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Achromatomaly (Color desensitivity) color blindness.
     /// </summary>
-    internal class AchromatomalyProcessor : FilterProcessor
+    public class AchromatomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="AchromatomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
index 4df94a7603..ab04a30ba1 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Achromatopsia (Monochrome) color blindness.
     /// </summary>
-    internal class AchromatopsiaProcessor : FilterProcessor
+    public class AchromatopsiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="AchromatopsiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
index 698f11cbf0..7e2e7f2f47 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
@@ -6,9 +6,9 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
-    /// Applies a black and white filter matrix to the image
+    /// Applies a black and white filter matrix to the image.
     /// </summary>
-    internal class BlackWhiteProcessor : FilterProcessor
+    public class BlackWhiteProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="BlackWhiteProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
index 6a1f3869ae..94a7a394a6 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a brightness filter matrix using the given amount.
     /// </summary>
-    internal class BrightnessProcessor : FilterProcessor
+    public class BrightnessProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="BrightnessProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
index 3bea695b99..1f74a1d642 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a contrast filter matrix using the given amount.
     /// </summary>
-    internal class ContrastProcessor : FilterProcessor
+    public class ContrastProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ContrastProcessor"/> class.
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         }
 
         /// <summary>
-        /// Gets the proportion of the conversion
+        /// Gets the proportion of the conversion.
         /// </summary>
         public float Amount { get; }
     }
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
index 395489d563..7ad0630aac 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Deuteranomaly (Green-Weak) color blindness.
     /// </summary>
-    internal class DeuteranomalyProcessor : FilterProcessor
+    public class DeuteranomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="DeuteranomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
index 51f8361e6c..188d02dc8b 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Deuteranopia (Green-Blind) color blindness.
     /// </summary>
-    internal class DeuteranopiaProcessor : FilterProcessor
+    public class DeuteranopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="DeuteranopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
index b615b7bc60..36c43d8446 100644
--- a/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/FilterProcessor.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
@@ -7,7 +7,7 @@ using SixLabors.ImageSharp.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
-    /// Provides methods that accept a <see cref="ColorMatrix"/> matrix to apply free-form filters to images.
+    /// Defines a free-form color filter by a <see cref="ColorMatrix"/>.
     /// </summary>
     public class FilterProcessor : IImageProcessor
     {
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
index b39e01b9a8..c24992b441 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.601
     /// </summary>
-    internal class GrayscaleBt601Processor : FilterProcessor
+    public class GrayscaleBt601Processor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GrayscaleBt601Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
index 7bbd915564..dc5294ccf0 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.709
     /// </summary>
-    internal class GrayscaleBt709Processor : FilterProcessor
+    public class GrayscaleBt709Processor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GrayscaleBt709Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
index a69fd50757..65f7eef330 100644
--- a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a hue filter matrix using the given angle of rotation in degrees
     /// </summary>
-    internal class HueProcessor : FilterProcessor
+    public class HueProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="HueProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
index d7631970db..cc41e65721 100644
--- a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a filter matrix that inverts the colors of an image
     /// </summary>
-    internal class InvertProcessor : FilterProcessor
+    public class InvertProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="InvertProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
index 5570f23d7d..a5215a434c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a filter matrix recreating an old Kodachrome camera effect matrix to the image
     /// </summary>
-    internal class KodachromeProcessor : FilterProcessor
+    public class KodachromeProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="KodachromeProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
index b102f4daf7..dae168e2cb 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
@@ -6,7 +6,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Lomograph effect.
     /// </summary>
-    internal class LomographProcessor : FilterProcessor
+    public class LomographProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="LomographProcessor" /> class.
@@ -16,6 +16,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         {
         }
 
+        /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>() =>
             new LomographProcessor<TPixel>(this);
     }
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
index 8ec4ec258a..c15cf6fc90 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
@@ -15,6 +15,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     {
         private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="LomographProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="LomographProcessor"/> defining the parameters.</param>
         public LomographProcessor(LomographProcessor definition)
             : base(definition)
         {
diff --git a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
index e790753f3b..0ee5dd59e5 100644
--- a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies an opacity filter matrix using the given amount.
     /// </summary>
-    internal class OpacityProcessor : FilterProcessor
+    public class OpacityProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="OpacityProcessor"/> class.
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         }
 
         /// <summary>
-        /// Gets the proportion of the conversion
+        /// Gets the proportion of the conversion.
         /// </summary>
         public float Amount { get; }
     }
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
index a73aa28de3..befcfc1f42 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
@@ -16,7 +16,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
         private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
 
-        public PolaroidProcessor(FilterProcessor definition)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolaroidProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="PolaroidProcessor"/> defining the parameters.</param>
+        public PolaroidProcessor(PolaroidProcessor definition)
             : base(definition)
         {
         }
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
index 95e369b371..755bc0f81a 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Protanomaly (Red-Weak) color blindness.
     /// </summary>
-    internal class ProtanomalyProcessor : FilterProcessor
+    public class ProtanomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ProtanomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
index bd92579130..c4f4a76611 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Protanopia (Red-Blind) color blindness.
     /// </summary>
-    internal class ProtanopiaProcessor : FilterProcessor
+    public class ProtanopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ProtanopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
index 424eeb461c..770fb98277 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a saturation filter matrix using the given amount.
     /// </summary>
-    internal class SaturateProcessor : FilterProcessor
+    public class SaturateProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SaturateProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
index 538db4b52c..9da48993a2 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a sepia filter matrix using the given amount.
     /// </summary>
-    internal class SepiaProcessor : FilterProcessor
+    public class SepiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SepiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
index 3eda05a115..c64475b994 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Tritanomaly (Blue-Weak) color blindness.
     /// </summary>
-    internal class TritanomalyProcessor : FilterProcessor
+    public class TritanomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="TritanomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
index f5ed26c833..722840e743 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating Tritanopia (Blue-Blind) color blindness.
     /// </summary>
-    internal class TritanopiaProcessor : FilterProcessor
+    public class TritanopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="TritanopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor.cs b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
index e9b2c9c0e3..9b030a6fea 100644
--- a/src/ImageSharp/Processing/Processors/IImageProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor.cs
@@ -2,12 +2,14 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors
 {
     /// <summary>
     /// Defines an algorithm to alter the pixels of an image.
+    /// Non-generic <see cref="IImageProcessor"/> implementations are responsible for:
+    /// 1. Encapsulating the parameters of the algorithm.
+    /// 2. Creating the generic <see cref="IImageProcessor{TPixel}"/> instance to execute the algorithm.
     /// </summary>
     public interface IImageProcessor
     {
@@ -20,56 +22,4 @@ namespace SixLabors.ImageSharp.Processing.Processors
         IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>;
     }
-
-    /// <summary>
-    /// Implements an algorithm to alter the pixels of an image.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public interface IImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Applies the process to the specified portion of the specified <see cref="ImageFrame{TPixel}"/>.
-        /// </summary>
-        /// <param name="source">The source image. Cannot be null.</param>
-        /// <param name="sourceRectangle">
-        /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to draw.
-        /// </param>
-        /// <exception cref="System.ArgumentNullException">
-        /// <paramref name="source"/> is null.
-        /// </exception>
-        /// <exception cref="System.ArgumentException">
-        /// <paramref name="sourceRectangle"/> doesn't fit the dimension of the image.
-        /// </exception>
-        void Apply(Image<TPixel> source, Rectangle sourceRectangle);
-    }
-
-    internal static class ImageProcessorExtensions
-    {
-        public static void Apply(this IImageProcessor processor, Image source, Rectangle sourceRectangle)
-        {
-            var visitor = new ApplyVisitor(processor, sourceRectangle);
-            source.AcceptVisitor(visitor);
-        }
-
-        private class ApplyVisitor : IImageVisitor
-        {
-            private readonly IImageProcessor processor;
-
-            private readonly Rectangle sourceRectangle;
-
-            public ApplyVisitor(IImageProcessor processor, Rectangle sourceRectangle)
-            {
-                this.processor = processor;
-                this.sourceRectangle = sourceRectangle;
-            }
-
-            public void Visit<TPixel>(Image<TPixel> image)
-                where TPixel : struct, IPixel<TPixel>
-            {
-                var processorImpl = this.processor.CreatePixelSpecificProcessor<TPixel>();
-                processorImpl.Apply(image, this.sourceRectangle);
-            }
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
new file mode 100644
index 0000000000..f2c7ef29c1
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
@@ -0,0 +1,31 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors
+{
+    /// <summary>
+    /// Implements an algorithm to alter the pixels of an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    public interface IImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Applies the process to the specified portion of the specified <see cref="ImageFrame{TPixel}"/>.
+        /// </summary>
+        /// <param name="source">The source image. Cannot be null.</param>
+        /// <param name="sourceRectangle">
+        /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to draw.
+        /// </param>
+        /// <exception cref="System.ArgumentNullException">
+        /// <paramref name="source"/> is null.
+        /// </exception>
+        /// <exception cref="System.ArgumentException">
+        /// <paramref name="sourceRectangle"/> doesn't fit the dimension of the image.
+        /// </exception>
+        void Apply(Image<TPixel> source, Rectangle sourceRectangle);
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
new file mode 100644
index 0000000000..1e189b9c78
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
@@ -0,0 +1,37 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors
+{
+    internal static class ImageProcessorExtensions
+    {
+        public static void Apply(this IImageProcessor processor, Image source, Rectangle sourceRectangle)
+        {
+            var visitor = new ApplyVisitor(processor, sourceRectangle);
+            source.AcceptVisitor(visitor);
+        }
+
+        private class ApplyVisitor : IImageVisitor
+        {
+            private readonly IImageProcessor processor;
+
+            private readonly Rectangle sourceRectangle;
+
+            public ApplyVisitor(IImageProcessor processor, Rectangle sourceRectangle)
+            {
+                this.processor = processor;
+                this.sourceRectangle = sourceRectangle;
+            }
+
+            public void Visit<TPixel>(Image<TPixel> image)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                var processorImpl = this.processor.CreatePixelSpecificProcessor<TPixel>();
+                processorImpl.Apply(image, this.sourceRectangle);
+            }
+        }
+    }
+}
\ No newline at end of file

From 432d35ccc322010a4d7f92131353fe1f673c37d8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 4 May 2019 23:53:00 +0200
Subject: [PATCH 126/223] Further refactor on Gaussian stuff

---
 .../Processing/GaussianSharpenExtensions.cs   |  26 ++---
 .../ConvolutionProcessorHelpers.cs            |  93 ++++++++++++++++
 .../Convolution/GaussianBlurProcessor.cs      |  16 +--
 .../GaussianBlurProcessor{TPixel}.cs          |  37 +------
 .../Convolution/GaussianSharpenProcessor.cs   | 101 +++++-------------
 .../GaussianSharpenProcessor{TPixel}.cs       |  42 ++++++++
 .../Convolution/GaussianSharpenTest.cs        |   6 +-
 7 files changed, 180 insertions(+), 141 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Processing/GaussianSharpenExtensions.cs b/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
index 675bbc142d..64aa7b5db3 100644
--- a/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
+++ b/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
@@ -1,50 +1,46 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Convolution;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds Gaussian sharpening extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds Gaussian sharpening extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class GaussianSharpenExtensions
     {
         /// <summary>
         /// Applies a Gaussian sharpening filter to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianSharpen<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-        => source.ApplyProcessor(new GaussianSharpenProcessor<TPixel>());
+        public static IImageProcessingContext GaussianSharpen(this IImageProcessingContext source) =>
+            source.ApplyProcessor(new GaussianSharpenProcessor());
 
         /// <summary>
         /// Applies a Gaussian sharpening filter to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianSharpen<TPixel>(this IImageProcessingContext<TPixel> source, float sigma)
-            where TPixel : struct, IPixel<TPixel>
-        => source.ApplyProcessor(new GaussianSharpenProcessor<TPixel>(sigma));
+        public static IImageProcessingContext GaussianSharpen(this IImageProcessingContext source, float sigma) =>
+            source.ApplyProcessor(new GaussianSharpenProcessor(sigma));
 
         /// <summary>
         /// Applies a Gaussian sharpening filter to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> GaussianSharpen<TPixel>(this IImageProcessingContext<TPixel> source, float sigma, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-        => source.ApplyProcessor(new GaussianSharpenProcessor<TPixel>(sigma), rectangle);
+        public static IImageProcessingContext GaussianSharpen(
+            this IImageProcessingContext source,
+            float sigma,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new GaussianSharpenProcessor(sigma), rectangle);
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
new file mode 100644
index 0000000000..bb0072b82e
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
@@ -0,0 +1,93 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    internal static class ConvolutionProcessorHelpers
+    {
+        /// <summary>
+        /// Kernel radius is calculated using the minimum viable value.
+        /// <see cref="http://chemaguerra.com/gaussian-filter-radius/"/>.
+        /// </summary>
+        internal static int GetDefaultGaussianRadius(float sigma)
+        {
+            return (int)MathF.Ceiling(sigma * 3);
+        }
+
+        /// <summary>
+        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
+        /// </summary>
+        /// <returns>The <see cref="DenseMatrix{T}"/>.</returns>
+        internal static DenseMatrix<float> CreateGaussianBlurKernel(int size, float weight)
+        {
+            var kernel = new DenseMatrix<float>(size, 1);
+
+            float sum = 0F;
+            float midpoint = (size - 1) / 2F;
+
+            for (int i = 0; i < size; i++)
+            {
+                float x = i - midpoint;
+                float gx = ImageMaths.Gaussian(x, weight);
+                sum += gx;
+                kernel[0, i] = gx;
+            }
+
+            // Normalize kernel so that the sum of all weights equals 1
+            for (int i = 0; i < size; i++)
+            {
+                kernel[0, i] /= sum;
+            }
+
+            return kernel;
+        }
+
+        /// <summary>
+        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
+        /// </summary>
+        /// <returns>The <see cref="DenseMatrix{T}"/>.</returns>
+        internal static DenseMatrix<float> CreateGaussianSharpenKernel(int size, float weight)
+        {
+            var kernel = new DenseMatrix<float>(size, 1);
+
+            float sum = 0;
+
+            float midpoint = (size - 1) / 2F;
+            for (int i = 0; i < size; i++)
+            {
+                float x = i - midpoint;
+                float gx = ImageMaths.Gaussian(x, weight);
+                sum += gx;
+                kernel[0, i] = gx;
+            }
+
+            // Invert the kernel for sharpening.
+            int midpointRounded = (int)midpoint;
+            for (int i = 0; i < size; i++)
+            {
+                if (i == midpointRounded)
+                {
+                    // Calculate central value
+                    kernel[0, i] = (2F * sum) - kernel[0, i];
+                }
+                else
+                {
+                    // invert value
+                    kernel[0, i] = -kernel[0, i];
+                }
+            }
+
+            // Normalize kernel so that the sum of all weights equals 1
+            for (int i = 0; i < size; i++)
+            {
+                kernel[0, i] /= sum;
+            }
+
+            return kernel;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
index 33e2ef955d..c64a024f9f 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
@@ -1,14 +1,13 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Defines a gaussian blur processor with a (Sigma, Radius) pair.
+    /// Defines Gaussian blur by a (Sigma, Radius) pair.
     /// </summary>
     public class GaussianBlurProcessor : IImageProcessor
     {
@@ -21,7 +20,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// Initializes a new instance of the <see cref="GaussianBlurProcessor"/> class.
         /// </summary>
         public GaussianBlurProcessor()
-            : this(DefaultSigma, CalculateDefaultRadius(DefaultSigma))
+            : this(DefaultSigma, ConvolutionProcessorHelpers.GetDefaultGaussianRadius(DefaultSigma))
         {
         }
 
@@ -30,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
         public GaussianBlurProcessor(float sigma)
-            : this(sigma, CalculateDefaultRadius(sigma))
+            : this(sigma, ConvolutionProcessorHelpers.GetDefaultGaussianRadius(sigma))
         {
         }
 
@@ -77,14 +76,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             return new GaussianBlurProcessor<TPixel>(this);
         }
-
-        /// <summary>
-        /// Kernel radius is calculated using the minimum viable value.
-        /// <see cref="http://chemaguerra.com/gaussian-filter-radius/"/>.
-        /// </summary>
-        private static int CalculateDefaultRadius(float sigma)
-        {
-            return (int)MathF.Ceiling(sigma * 3);
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs
index 9b60fb2d2e..a129ff5473 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor{TPixel}.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
@@ -14,17 +14,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     internal class GaussianBlurProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private readonly GaussianBlurProcessor definition;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="GaussianBlurProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="definition">The <see cref="GaussianBlurProcessor"/> defining the processor parameters.</param>
         public GaussianBlurProcessor(GaussianBlurProcessor definition)
         {
-            this.definition = definition;
             int kernelSize = (definition.Radius * 2) + 1;
-            this.KernelX = CreateGaussianKernel(kernelSize, definition.Sigma);
+            this.KernelX = ConvolutionProcessorHelpers.CreateGaussianBlurKernel(kernelSize, definition.Sigma);
             this.KernelY = this.KernelX.Transpose();
         }
 
@@ -47,33 +44,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
                 source,
                 sourceRectangle,
                 configuration);
-
-        /// <summary>
-        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
-        /// </summary>
-        /// <returns>The <see cref="DenseMatrix{T}"/></returns>
-        private static DenseMatrix<float> CreateGaussianKernel(int size, float weight)
-        {
-            var kernel = new DenseMatrix<float>(size, 1);
-
-            float sum = 0F;
-            float midpoint = (size - 1) / 2F;
-
-            for (int i = 0; i < size; i++)
-            {
-                float x = i - midpoint;
-                float gx = ImageMaths.Gaussian(x, weight);
-                sum += gx;
-                kernel[0, i] = gx;
-            }
-
-            // Normalize kernel so that the sum of all weights equals 1
-            for (int i = 0; i < size; i++)
-            {
-                kernel[0, i] /= sum;
-            }
-
-            return kernel;
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
index 001471720a..bc06ee6182 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
@@ -3,38 +3,38 @@
 
 using System;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Primitives;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies Gaussian sharpening processing to the image.
+    /// Defines Gaussian sharpening by a (Sigma, Radius) pair.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GaussianSharpenProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class GaussianSharpenProcessor : IImageProcessor
     {
+         /// <summary>
+        /// The default value for <see cref="Sigma"/>.
+        /// </summary>
+        public const float DefaultSigma = 3f;
+
         /// <summary>
-        /// The maximum size of the kernel in either direction.
+        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor"/> class.
         /// </summary>
-        private readonly int kernelSize;
+        public GaussianSharpenProcessor()
+            : this(DefaultSigma, ConvolutionProcessorHelpers.GetDefaultGaussianRadius(DefaultSigma))
+        {
+        }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor"/> class.
         /// </summary>
-        /// <param name="sigma">
-        /// The 'sigma' value representing the weight of the sharpening.
-        /// </param>
-        public GaussianSharpenProcessor(float sigma = 3F)
-            : this(sigma, (int)MathF.Ceiling(sigma * 3))
+        /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
+        public GaussianSharpenProcessor(float sigma)
+            : this(sigma, ConvolutionProcessorHelpers.GetDefaultGaussianRadius(sigma))
         {
-            // Kernel radius is calculated using the minimum viable value.
-            // http://chemaguerra.com/gaussian-filter-radius/
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor"/> class.
         /// </summary>
         /// <param name="radius">
         /// The 'radius' value representing the size of the area to sample.
@@ -45,10 +45,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor"/> class.
         /// </summary>
         /// <param name="sigma">
-        /// The 'sigma' value representing the weight of the sharpen.
+        /// The 'sigma' value representing the weight of the blur.
         /// </param>
         /// <param name="radius">
         /// The 'radius' value representing the size of the area to sample.
@@ -56,10 +56,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </param>
         public GaussianSharpenProcessor(float sigma, int radius)
         {
-            this.kernelSize = (radius * 2) + 1;
             this.Sigma = sigma;
-            this.KernelX = this.CreateGaussianKernel();
-            this.KernelY = this.KernelX.Transpose();
+            this.Radius = radius;
         }
 
         /// <summary>
@@ -68,63 +66,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         public float Sigma { get; }
 
         /// <summary>
-        /// Gets the horizontal gradient operator.
-        /// </summary>
-        public DenseMatrix<float> KernelX { get; }
-
-        /// <summary>
-        /// Gets the vertical gradient operator.
+        /// Gets the radius defining the size of the area to sample.
         /// </summary>
-        public DenseMatrix<float> KernelY { get; }
+        public int Radius { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
-
-        /// <summary>
-        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
-        /// </summary>
-        /// <returns>The <see cref="DenseMatrix{T}"/></returns>
-        private DenseMatrix<float> CreateGaussianKernel()
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            int size = this.kernelSize;
-            float weight = this.Sigma;
-            var kernel = new DenseMatrix<float>(size, 1);
-
-            float sum = 0;
-
-            float midpoint = (size - 1) / 2F;
-            for (int i = 0; i < size; i++)
-            {
-                float x = i - midpoint;
-                float gx = ImageMaths.Gaussian(x, weight);
-                sum += gx;
-                kernel[0, i] = gx;
-            }
-
-            // Invert the kernel for sharpening.
-            int midpointRounded = (int)midpoint;
-            for (int i = 0; i < size; i++)
-            {
-                if (i == midpointRounded)
-                {
-                    // Calculate central value
-                    kernel[0, i] = (2F * sum) - kernel[0, i];
-                }
-                else
-                {
-                    // invert value
-                    kernel[0, i] = -kernel[0, i];
-                }
-            }
-
-            // Normalize kernel so that the sum of all weights equals 1
-            for (int i = 0; i < size; i++)
-            {
-                kernel[0, i] /= sum;
-            }
-
-            return kernel;
+            return new GaussianSharpenProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor{TPixel}.cs
new file mode 100644
index 0000000000..edde9f9e7f
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor{TPixel}.cs
@@ -0,0 +1,42 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    /// <summary>
+    /// Applies Gaussian sharpening processing to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class GaussianSharpenProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GaussianSharpenProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="GaussianBlurProcessor"/> defining the processor parameters.</param>
+        public GaussianSharpenProcessor(GaussianSharpenProcessor definition)
+        {
+            int kernelSize = (definition.Radius * 2) + 1;
+            this.KernelX = ConvolutionProcessorHelpers.CreateGaussianSharpenKernel(kernelSize, definition.Sigma);
+            this.KernelY = this.KernelX.Transpose();
+        }
+
+        /// <summary>
+        /// Gets the horizontal gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelX { get; }
+
+        /// <summary>
+        /// Gets the vertical gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelY { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+            => new Convolution2PassProcessor<TPixel>(this.KernelX, this.KernelY, false).Apply(source, sourceRectangle, configuration);
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Convolution/GaussianSharpenTest.cs b/tests/ImageSharp.Tests/Processing/Convolution/GaussianSharpenTest.cs
index 675498745e..7c2205f4e4 100644
--- a/tests/ImageSharp.Tests/Processing/Convolution/GaussianSharpenTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Convolution/GaussianSharpenTest.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianSharpen_GaussianSharpenProcessorDefaultsSet()
         {
             this.operations.GaussianSharpen();
-            var processor = this.Verify<GaussianSharpenProcessor<Rgba32>>();
+            var processor = this.Verify<GaussianSharpenProcessor>();
 
             Assert.Equal(3f, processor.Sigma);
         }
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianSharpen_amount_GaussianSharpenProcessorDefaultsSet()
         {
             this.operations.GaussianSharpen(0.2f);
-            var processor = this.Verify<GaussianSharpenProcessor<Rgba32>>();
+            var processor = this.Verify<GaussianSharpenProcessor>();
 
             Assert.Equal(.2f, processor.Sigma);
         }
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         public void GaussianSharpen_amount_rect_GaussianSharpenProcessorDefaultsSet()
         {
             this.operations.GaussianSharpen(0.6f, this.rect);
-            var processor = this.Verify<GaussianSharpenProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<GaussianSharpenProcessor>(this.rect);
 
             Assert.Equal(.6f, processor.Sigma);
         }

From 91d0f6fd02126b9bc952a749f9eac2d3cf75b425 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 00:18:23 +0200
Subject: [PATCH 127/223] drop IEdgeDetectorProcessor

---
 .../Processing/DetectEdgesExtensions.cs       |  9 +++---
 .../Convolution/BoxBlurProcessor{TPixel}.cs   |  5 ++--
 .../ConvolutionProcessorHelpers.cs            |  8 +++---
 .../Convolution/EdgeDetector2DProcessor.cs    |  2 +-
 .../EdgeDetectorCompassProcessor.cs           |  2 +-
 .../Convolution/EdgeDetectorProcessor.cs      |  2 +-
 .../Convolution/GaussianSharpenProcessor.cs   |  1 +
 .../Convolution/IEdgeDetectorProcessor.cs     | 28 -------------------
 .../Processors/IImageProcessor{TPixel}.cs     |  4 +--
 .../Processors/ImageProcessorExtensions.cs    |  4 +--
 .../Transforms/Resize/ResizeProcessor.cs      |  2 +-
 .../Processing/Convolution/DetectEdgesTest.cs |  4 +--
 12 files changed, 22 insertions(+), 49 deletions(-)
 delete mode 100644 src/ImageSharp/Processing/Processors/Convolution/IEdgeDetectorProcessor.cs

diff --git a/src/ImageSharp/Processing/DetectEdgesExtensions.cs b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
index 5ac89df291..a3be298d0b 100644
--- a/src/ImageSharp/Processing/DetectEdgesExtensions.cs
+++ b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.ImageSharp.Processing.Processors.Convolution;
 using SixLabors.Primitives;
 
@@ -82,7 +83,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, IEdgeDetectorProcessor<TPixel> filter)
+        private static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, IImageProcessor<TPixel> filter)
             where TPixel : struct, IPixel<TPixel>
         {
             return source.ApplyProcessor(filter);
@@ -98,17 +99,17 @@ namespace SixLabors.ImageSharp.Processing
         /// </param>
         /// <param name="filter">The filter for detecting edges.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle, IEdgeDetectorProcessor<TPixel> filter)
+        private static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle, IImageProcessor<TPixel> filter)
             where TPixel : struct, IPixel<TPixel>
         {
             source.ApplyProcessor(filter, rectangle);
             return source;
         }
 
-        private static IEdgeDetectorProcessor<TPixel> GetProcessor<TPixel>(EdgeDetectionOperators filter, bool grayscale)
+        private static IImageProcessor<TPixel> GetProcessor<TPixel>(EdgeDetectionOperators filter, bool grayscale)
             where TPixel : struct, IPixel<TPixel>
         {
-            IEdgeDetectorProcessor<TPixel> processor;
+            IImageProcessor<TPixel> processor;
 
             switch (filter)
             {
diff --git a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
index ba092cb424..f4252e840d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor{TPixel}.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
@@ -38,7 +38,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         public DenseMatrix<float> KernelY { get; }
 
-
         /// <inheritdoc/>
         protected override void OnFrameApply(
             ImageFrame<TPixel> source,
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
index bb0072b82e..1fb26c976a 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using System;
 
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     {
         /// <summary>
         /// Kernel radius is calculated using the minimum viable value.
-        /// <see cref="http://chemaguerra.com/gaussian-filter-radius/"/>.
+        /// See http://chemaguerra.com/gaussian-filter-radius/ .
         /// </summary>
         internal static int GetDefaultGaussianRadius(float sigma)
         {
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         }
 
         /// <summary>
-        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function
+        /// Create a 1 dimensional Gaussian kernel using the Gaussian G(x) function.
         /// </summary>
         /// <returns>The <see cref="DenseMatrix{T}"/>.</returns>
         internal static DenseMatrix<float> CreateGaussianBlurKernel(int size, float weight)
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index b4ac89139a..ef185a01f0 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -12,7 +12,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines a processor that detects edges within an image using two one-dimensional matrices.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetector2DProcessor<TPixel> : ImageProcessor<TPixel>, IEdgeDetectorProcessor<TPixel>
+    internal abstract class EdgeDetector2DProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
index aa33699f5d..1205b02dc0 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines a processor that detects edges within an image using a eight two dimensional matrices.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetectorCompassProcessor<TPixel> : ImageProcessor<TPixel>, IEdgeDetectorProcessor<TPixel>
+    internal abstract class EdgeDetectorCompassProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
index 9ec79da9eb..b4d4763d03 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
@@ -12,7 +12,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines a processor that detects edges within an image using a single two dimensional matrix.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetectorProcessor<TPixel> : ImageProcessor<TPixel>, IEdgeDetectorProcessor<TPixel>
+    internal abstract class EdgeDetectorProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
index bc06ee6182..84e56869d3 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
@@ -70,6 +70,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         public int Radius { get; }
 
+        /// <inheritdoc />
         public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/src/ImageSharp/Processing/Processors/Convolution/IEdgeDetectorProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/IEdgeDetectorProcessor.cs
deleted file mode 100644
index b2ecbf1158..0000000000
--- a/src/ImageSharp/Processing/Processors/Convolution/IEdgeDetectorProcessor.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors;
-
-namespace SixLabors.ImageSharp.Processing.Processors.Convolution
-{
-    /// <summary>
-    /// Provides properties and methods allowing the detection of edges within an image.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public interface IEdgeDetectorProcessor<TPixel> : IImageProcessor<TPixel>, IEdgeDetectorProcessor
-        where TPixel : struct, IPixel<TPixel>
-    {
-    }
-
-    /// <summary>
-    /// Provides properties and methods allowing the detection of edges within an image.
-    /// </summary>
-    public interface IEdgeDetectorProcessor
-    {
-        /// <summary>
-        /// Gets a value indicating whether to convert the image to grayscale before performing edge detection.
-        /// </summary>
-        bool Grayscale { get; }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
index f2c7ef29c1..90dfaf8db5 100644
--- a/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/IImageProcessor{TPixel}.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
diff --git a/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
index 1e189b9c78..762d761c6c 100644
--- a/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
+++ b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
index 5710c4bd8c..8762d6b263 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor.cs
@@ -9,7 +9,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Implements resizing of images using various resamplers.
+    /// Defines an image resizing operation with the given <see cref="IResampler"/> and dimensional parameters.
     /// </summary>
     public class ResizeProcessor : IImageProcessor
     {
diff --git a/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
index 60fa19b490..cf5feac275 100644
--- a/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         [Theory]
         [MemberData(nameof(EdgeDetectionTheoryData))]
         public void DetectEdges_filter_SobelProcessorDefaultsSet<TProcessor>(TestType<TProcessor> type, EdgeDetectionOperators filter)
-            where TProcessor : IEdgeDetectorProcessor<Rgba32>
+            where TProcessor : IImageProcessor<Rgba32>
         {
             this.operations.DetectEdges(filter);
 
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
         [Theory]
         [MemberData(nameof(EdgeDetectionTheoryData))]
         public void DetectEdges_filter_grayscale_SobelProcessorDefaultsSet<TProcessor>(TestType<TProcessor> type, EdgeDetectionOperators filter)
-            where TProcessor : IEdgeDetectorProcessor<Rgba32>
+            where TProcessor : IImageProcessor<Rgba32>
         {
             bool grey = (int)filter % 2 == 0;
             this.operations.DetectEdges(filter, grey);

From 9b451fab0cfeb017c58a7d475565538b63942a00 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 01:10:24 +0200
Subject: [PATCH 128/223] Refactor edge detection

---
 src/ImageSharp/ImageSharp.csproj.DotSettings  |  1 +
 .../Processing/DetectEdgesExtensions.cs       | 96 +++++++++----------
 .../ConvolutionProcessorHelpers.cs            |  2 +-
 .../Convolution/EdgeDetector2DProcessor.cs    |  5 +-
 .../EdgeDetectorCompassProcessor.cs           | 54 ++---------
 .../Convolution/EdgeDetectorProcessor.cs      | 37 ++-----
 .../EdgeDetectorProcessor{TPixel}.cs          | 49 ++++++++++
 .../Convolution/KayyaliProcessor.cs           | 22 +++--
 .../Convolution/Kernels/CompassKernels.cs     | 57 +++++++++++
 .../{ => Kernels}/KayyaliKernels.cs           |  0
 .../{ => Kernels}/KirschKernels.cs            | 18 ++--
 .../{ => Kernels}/LaplacianKernelFactory.cs   |  0
 .../{ => Kernels}/LaplacianKernels.cs         |  0
 .../{ => Kernels}/PrewittKernels.cs           |  0
 .../{ => Kernels}/RobertsCrossKernels.cs      |  0
 .../{ => Kernels}/RobinsonKernels.cs          | 20 ++--
 .../{ => Kernels}/ScharrKernels.cs            |  0
 .../Convolution/{ => Kernels}/SobelKernels.cs |  0
 .../Processors/Convolution/KirschProcessor.cs | 40 ++------
 .../Convolution/Laplacian3x3Processor.cs      | 14 ++-
 .../Convolution/Laplacian5x5Processor.cs      | 20 ++--
 .../LaplacianOfGaussianProcessor.cs           | 18 ++--
 .../Convolution/PrewittProcessor.cs           | 20 ++--
 .../Convolution/RobertsCrossProcessor.cs      | 18 ++--
 .../Convolution/RobinsonProcessor.cs          | 38 ++------
 .../Processors/Convolution/ScharrProcessor.cs | 16 ++--
 .../Processors/Convolution/SobelProcessor.cs  | 27 ++++--
 .../Transforms/EntropyCropProcessor.cs        |  2 +-
 .../Processing/Convolution/DetectEdgesTest.cs | 40 ++++----
 29 files changed, 329 insertions(+), 285 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Convolution/Kernels/CompassKernels.cs
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/KayyaliKernels.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/KirschKernels.cs (81%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/LaplacianKernelFactory.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/LaplacianKernels.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/PrewittKernels.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/RobertsCrossKernels.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/RobinsonKernels.cs (78%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/ScharrKernels.cs (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ => Kernels}/SobelKernels.cs (100%)

diff --git a/src/ImageSharp/ImageSharp.csproj.DotSettings b/src/ImageSharp/ImageSharp.csproj.DotSettings
index a7337240a5..e446893e94 100644
--- a/src/ImageSharp/ImageSharp.csproj.DotSettings
+++ b/src/ImageSharp/ImageSharp.csproj.DotSettings
@@ -6,5 +6,6 @@
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cpixelimplementations/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cpixeltypes/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cutils/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Cconvolution_005Ckernels/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Ctransforms_005Cresamplers/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Ctransforms_005Cresize/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/DetectEdgesExtensions.cs b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
index a3be298d0b..7527d601df 100644
--- a/src/ImageSharp/Processing/DetectEdgesExtensions.cs
+++ b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.ImageSharp.Processing.Processors.Convolution;
 using SixLabors.Primitives;
@@ -9,82 +8,79 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds edge detection extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds edge detection extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class DetectEdgesExtensions
     {
         /// <summary>
-        /// Detects any edges within the image. Uses the <see cref="SobelProcessor{TPixel}"/> filter
+        /// Detects any edges within the image. Uses the <see cref="SobelProcessor"/> filter
         /// operating in grayscale mode.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => DetectEdges(source, new SobelProcessor<TPixel>(true));
+        /// <returns>The <see cref="Image"/>.</returns>
+        public static IImageProcessingContext DetectEdges(this IImageProcessingContext source) =>
+            DetectEdges(source, new SobelProcessor(true));
 
         /// <summary>
-        /// Detects any edges within the image. Uses the <see cref="SobelProcessor{TPixel}"/> filter
+        /// Detects any edges within the image. Uses the <see cref="SobelProcessor"/> filter
         /// operating in grayscale mode.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => DetectEdges(source, rectangle, new SobelProcessor<TPixel>(true));
+        /// <returns>The <see cref="Image"/>.</returns>
+        public static IImageProcessingContext DetectEdges(this IImageProcessingContext source, Rectangle rectangle) =>
+            DetectEdges(source, rectangle, new SobelProcessor(true));
 
         /// <summary>
         /// Detects any edges within the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, EdgeDetectionOperators filter)
-            where TPixel : struct, IPixel<TPixel>
-            => DetectEdges(source, GetProcessor<TPixel>(filter, true));
+        /// <returns>The <see cref="Image"/>.</returns>
+        public static IImageProcessingContext DetectEdges(
+            this IImageProcessingContext source,
+            EdgeDetectionOperators filter) =>
+            DetectEdges(source, GetProcessor(filter, true));
 
         /// <summary>
         /// Detects any edges within the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale first. Defaults to true.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, EdgeDetectionOperators filter, bool grayscale)
-            where TPixel : struct, IPixel<TPixel>
-            => DetectEdges(source, GetProcessor<TPixel>(filter, grayscale));
+        /// <returns>The <see cref="Image"/>.</returns>
+        public static IImageProcessingContext DetectEdges(
+            this IImageProcessingContext source,
+            EdgeDetectionOperators filter,
+            bool grayscale) =>
+            DetectEdges(source, GetProcessor(filter, grayscale));
 
         /// <summary>
         /// Detects any edges within the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <param name="grayscale">Whether to convert the image to grayscale first. Defaults to true.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, EdgeDetectionOperators filter, Rectangle rectangle, bool grayscale = true)
-            where TPixel : struct, IPixel<TPixel>
-            => DetectEdges(source, rectangle, GetProcessor<TPixel>(filter, grayscale));
+        /// <returns>The <see cref="Image"/>.</returns>
+        public static IImageProcessingContext DetectEdges(
+            this IImageProcessingContext source,
+            EdgeDetectionOperators filter,
+            Rectangle rectangle,
+            bool grayscale = true) =>
+            DetectEdges(source, rectangle, GetProcessor(filter, grayscale));
 
         /// <summary>
         /// Detects any edges within the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        private static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, IImageProcessor<TPixel> filter)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="Image"/>.</returns>
+        private static IImageProcessingContext DetectEdges(this IImageProcessingContext source, IImageProcessor filter)
         {
             return source.ApplyProcessor(filter);
         }
@@ -92,65 +88,65 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Detects any edges within the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        private static IImageProcessingContext<TPixel> DetectEdges<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle, IImageProcessor<TPixel> filter)
-            where TPixel : struct, IPixel<TPixel>
+        /// <returns>The <see cref="Image"/>.</returns>
+        private static IImageProcessingContext DetectEdges(
+            this IImageProcessingContext source,
+            Rectangle rectangle,
+            IImageProcessor filter)
         {
             source.ApplyProcessor(filter, rectangle);
             return source;
         }
 
-        private static IImageProcessor<TPixel> GetProcessor<TPixel>(EdgeDetectionOperators filter, bool grayscale)
-            where TPixel : struct, IPixel<TPixel>
+        private static IImageProcessor GetProcessor(EdgeDetectionOperators filter, bool grayscale)
         {
-            IImageProcessor<TPixel> processor;
+            IImageProcessor processor;
 
             switch (filter)
             {
                 case EdgeDetectionOperators.Kayyali:
-                    processor = new KayyaliProcessor<TPixel>(grayscale);
+                    processor = new KayyaliProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Kirsch:
-                    processor = new KirschProcessor<TPixel>(grayscale);
+                    processor = new KirschProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Laplacian3x3:
-                    processor = new Laplacian3x3Processor<TPixel>(grayscale);
+                    processor = new Laplacian3x3Processor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Laplacian5x5:
-                    processor = new Laplacian5x5Processor<TPixel>(grayscale);
+                    processor = new Laplacian5x5Processor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.LaplacianOfGaussian:
-                    processor = new LaplacianOfGaussianProcessor<TPixel>(grayscale);
+                    processor = new LaplacianOfGaussianProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Prewitt:
-                    processor = new PrewittProcessor<TPixel>(grayscale);
+                    processor = new PrewittProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.RobertsCross:
-                    processor = new RobertsCrossProcessor<TPixel>(grayscale);
+                    processor = new RobertsCrossProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Robinson:
-                    processor = new RobinsonProcessor<TPixel>(grayscale);
+                    processor = new RobinsonProcessor(grayscale);
                     break;
 
                 case EdgeDetectionOperators.Scharr:
-                    processor = new ScharrProcessor<TPixel>(grayscale);
+                    processor = new ScharrProcessor(grayscale);
                     break;
 
                 default:
-                    processor = new SobelProcessor<TPixel>(grayscale);
+                    processor = new SobelProcessor(grayscale);
                     break;
             }
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
index 1fb26c976a..661ab523db 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     {
         /// <summary>
         /// Kernel radius is calculated using the minimum viable value.
-        /// See http://chemaguerra.com/gaussian-filter-radius/ .
+        /// See <see href="http://chemaguerra.com/gaussian-filter-radius/"/>.
         /// </summary>
         internal static int GetDefaultGaussianRadius(float sigma)
         {
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
index ef185a01f0..5daf14fc32 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
@@ -12,7 +12,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines a processor that detects edges within an image using two one-dimensional matrices.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetector2DProcessor<TPixel> : ImageProcessor<TPixel>
+    internal class EdgeDetector2DProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <param name="kernelX">The horizontal gradient operator.</param>
         /// <param name="kernelY">The vertical gradient operator.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetector2DProcessor(in DenseMatrix<float> kernelX, in DenseMatrix<float> kernelY, bool grayscale)
+        internal EdgeDetector2DProcessor(in DenseMatrix<float> kernelX, in DenseMatrix<float> kernelY, bool grayscale)
         {
             Guard.IsTrue(kernelX.Size.Equals(kernelY.Size), $"{nameof(kernelX)} {nameof(kernelY)}", "Kernel sizes must be the same.");
             this.KernelX = kernelX;
@@ -39,7 +39,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// </summary>
         public DenseMatrix<float> KernelY { get; }
 
-        /// <inheritdoc/>
         public bool Grayscale { get; }
 
         /// <inheritdoc />
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
index 1205b02dc0..227003195d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
@@ -19,57 +19,23 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines a processor that detects edges within an image using a eight two dimensional matrices.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetectorCompassProcessor<TPixel> : ImageProcessor<TPixel>
+    internal class EdgeDetectorCompassProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="EdgeDetectorCompassProcessor{TPixel}"/> class.
         /// </summary>
+        /// <param name="kernels">Gets the kernels to use.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetectorCompassProcessor(bool grayscale) => this.Grayscale = grayscale;
-
-        /// <summary>
-        /// Gets the North gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> North { get; }
-
-        /// <summary>
-        /// Gets the NorthWest gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> NorthWest { get; }
-
-        /// <summary>
-        /// Gets the West gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> West { get; }
-
-        /// <summary>
-        /// Gets the SouthWest gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> SouthWest { get; }
-
-        /// <summary>
-        /// Gets the South gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> South { get; }
-
-        /// <summary>
-        /// Gets the SouthEast gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> SouthEast { get; }
-
-        /// <summary>
-        /// Gets the East gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> East { get; }
+        internal EdgeDetectorCompassProcessor(CompassKernels kernels, bool grayscale)
+        {
+            this.Grayscale = grayscale;
+            this.Kernels = kernels;
+        }
 
-        /// <summary>
-        /// Gets the NorthEast gradient operator
-        /// </summary>
-        public abstract DenseMatrix<float> NorthEast { get; }
+        private CompassKernels Kernels { get; }
 
-        /// <inheritdoc/>
-        public bool Grayscale { get; }
+        private bool Grayscale { get; }
 
         /// <inheritdoc/>
         protected override void BeforeFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
@@ -83,7 +49,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <inheritdoc />
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
-            DenseMatrix<float>[] kernels = { this.North, this.NorthWest, this.West, this.SouthWest, this.South, this.SouthEast, this.East, this.NorthEast };
+            DenseMatrix<float>[] kernels = this.Kernels.Flatten();
 
             int startY = sourceRectangle.Y;
             int endY = sourceRectangle.Bottom;
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
index b4d4763d03..75be15bcc7 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor.cs
@@ -2,49 +2,30 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Primitives;
-using SixLabors.ImageSharp.Processing.Processors.Filters;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
     /// Defines a processor that detects edges within an image using a single two dimensional matrix.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class EdgeDetectorProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public abstract class EdgeDetectorProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="EdgeDetectorProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="EdgeDetectorProcessor"/> class.
         /// </summary>
-        /// <param name="kernelXY">The 2d gradient operator.</param>
-        /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
-        protected EdgeDetectorProcessor(in DenseMatrix<float> kernelXY, bool grayscale)
+        /// <param name="grayscale">A value indicating whether to convert the image to grayscale before performing edge detection.</param>
+        protected EdgeDetectorProcessor(bool grayscale)
         {
-            this.KernelXY = kernelXY;
             this.Grayscale = grayscale;
         }
 
-        /// <inheritdoc/>
-        public bool Grayscale { get; }
-
         /// <summary>
-        /// Gets the 2d gradient operator.
+        /// Gets a value indicating whether to convert the image to grayscale before performing edge detection.
         /// </summary>
-        public DenseMatrix<float> KernelXY { get; }
-
-        /// <inheritdoc/>
-        protected override void BeforeFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            if (this.Grayscale)
-            {
-                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
-            }
-        }
+        public bool Grayscale { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-            => new ConvolutionProcessor<TPixel>(this.KernelXY, true).Apply(source, sourceRectangle, configuration);
+        /// <inheritdoc />
+        public abstract IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
new file mode 100644
index 0000000000..026313cc12
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
@@ -0,0 +1,49 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    /// <summary>
+    /// Defines a processor that detects edges within an image using a single two dimensional matrix.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class EdgeDetectorProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EdgeDetectorProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="kernelXY">The 2d gradient operator.</param>
+        /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
+        public EdgeDetectorProcessor(in DenseMatrix<float> kernelXY, bool grayscale)
+        {
+            this.KernelXY = kernelXY;
+            this.Grayscale = grayscale;
+        }
+
+        public bool Grayscale { get; }
+
+        /// <summary>
+        /// Gets the 2d gradient operator.
+        /// </summary>
+        public DenseMatrix<float> KernelXY { get; }
+
+        /// <inheritdoc/>
+        protected override void BeforeFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            if (this.Grayscale)
+            {
+                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+            => new ConvolutionProcessor<TPixel>(this.KernelXY, true).Apply(source, sourceRectangle, configuration);
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
index 8652efa120..99dfb17ffb 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
@@ -1,24 +1,30 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Kayyali operator filter. <see href="http://edgedetection.webs.com/"/>
+    /// Defines edge detection processing using the Kayyali operator filter.
+    /// See <see href="http://edgedetection.webs.com/"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class KayyaliProcessor<TPixel> : EdgeDetector2DProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    public class KayyaliProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="KayyaliProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="KayyaliProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public KayyaliProcessor(bool grayscale)
-            : base(KayyaliKernels.KayyaliX, KayyaliKernels.KayyaliY, grayscale)
+            : base(grayscale)
+        {
+        }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
+            return new EdgeDetector2DProcessor<TPixel>(
+                KayyaliKernels.KayyaliX,
+                KayyaliKernels.KayyaliY,
+                this.Grayscale);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Kernels/CompassKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/CompassKernels.cs
new file mode 100644
index 0000000000..f44de9105b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Convolution/Kernels/CompassKernels.cs
@@ -0,0 +1,57 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Convolution
+{
+    internal abstract class CompassKernels
+    {
+        /// <summary>
+        /// Gets the North gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> North { get; }
+
+        /// <summary>
+        /// Gets the NorthWest gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> NorthWest { get; }
+
+        /// <summary>
+        /// Gets the West gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> West { get; }
+
+        /// <summary>
+        /// Gets the SouthWest gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> SouthWest { get; }
+
+        /// <summary>
+        /// Gets the South gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> South { get; }
+
+        /// <summary>
+        /// Gets the SouthEast gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> SouthEast { get; }
+
+        /// <summary>
+        /// Gets the East gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> East { get; }
+
+        /// <summary>
+        /// Gets the NorthEast gradient operator.
+        /// </summary>
+        public abstract DenseMatrix<float> NorthEast { get; }
+
+        public DenseMatrix<float>[] Flatten() =>
+            new[]
+                {
+                    this.North, this.NorthWest, this.West, this.SouthWest,
+                    this.South, this.SouthEast, this.East, this.NorthEast
+                };
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KayyaliKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/KayyaliKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/KayyaliKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/KayyaliKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KirschKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/KirschKernels.cs
similarity index 81%
rename from src/ImageSharp/Processing/Processors/Convolution/KirschKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/KirschKernels.cs
index 86232e306a..882b87075b 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/KirschKernels.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Kernels/KirschKernels.cs
@@ -8,12 +8,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// <summary>
     /// Contains the eight matrices used for Kirsch edge detection
     /// </summary>
-    internal static class KirschKernels
+    internal class KirschKernels : CompassKernels
     {
         /// <summary>
         /// Gets the North gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschNorth =>
+        public override DenseMatrix<float> North =>
             new float[,]
             {
                { 5,  5,  5 },
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the NorthWest gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschNorthWest =>
+        public override DenseMatrix<float> NorthWest =>
             new float[,]
             {
                { 5,  5, -3 },
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the West gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschWest =>
+        public override DenseMatrix<float> West =>
             new float[,]
             {
                { 5, -3, -3 },
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the SouthWest gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschSouthWest =>
+        public override DenseMatrix<float> SouthWest =>
             new float[,]
             {
                { -3, -3, -3 },
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the South gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschSouth =>
+        public override DenseMatrix<float> South =>
             new float[,]
             {
                { -3, -3, -3 },
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the SouthEast gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschSouthEast =>
+        public override DenseMatrix<float> SouthEast =>
             new float[,]
             {
                { -3, -3, -3 },
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the East gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschEast =>
+        public override DenseMatrix<float> East =>
             new float[,]
             {
                { -3, -3, 5 },
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the NorthEast gradient operator
         /// </summary>
-        public static DenseMatrix<float> KirschNorthEast =>
+        public override DenseMatrix<float> NorthEast =>
             new float[,]
             {
                { -3,  5,  5 },
diff --git a/src/ImageSharp/Processing/Processors/Convolution/LaplacianKernelFactory.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/LaplacianKernelFactory.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/LaplacianKernelFactory.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/LaplacianKernelFactory.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/LaplacianKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/LaplacianKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/LaplacianKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/LaplacianKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/PrewittKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/PrewittKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/PrewittKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/PrewittKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/RobertsCrossKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/RobertsCrossKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/RobertsCrossKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobinsonKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/RobinsonKernels.cs
similarity index 78%
rename from src/ImageSharp/Processing/Processors/Convolution/RobinsonKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/RobinsonKernels.cs
index 4f47184e30..699d669ec9 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/RobinsonKernels.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Kernels/RobinsonKernels.cs
@@ -6,14 +6,14 @@ using SixLabors.ImageSharp.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Contains the kernels used for Robinson edge detection
+    /// Contains the kernels used for Robinson edge detection.
     /// </summary>
-    internal static class RobinsonKernels
+    internal class RobinsonKernels : CompassKernels
     {
         /// <summary>
         /// Gets the North gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonNorth =>
+        public override DenseMatrix<float> North =>
             new float[,]
             {
                { 1, 2, 1 },
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the NorthWest gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonNorthWest =>
+        public override DenseMatrix<float> NorthWest =>
             new float[,]
             {
                { 2,  1, 0 },
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the West gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonWest =>
+        public override DenseMatrix<float> West =>
             new float[,]
             {
                { 1, 0, -1 },
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the SouthWest gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonSouthWest =>
+        public override DenseMatrix<float> SouthWest =>
             new float[,]
             {
                { 0, -1, -2 },
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the South gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonSouth =>
+        public override DenseMatrix<float> South =>
             new float[,]
             {
                { -1, -2, -1 },
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the SouthEast gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonSouthEast =>
+        public override DenseMatrix<float> SouthEast =>
             new float[,]
             {
                { -2, -1, 0 },
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the East gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonEast =>
+        public override DenseMatrix<float> East =>
             new float[,]
             {
                { -1, 0, 1 },
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         /// <summary>
         /// Gets the NorthEast gradient operator
         /// </summary>
-        public static DenseMatrix<float> RobinsonNorthEast =>
+        public override DenseMatrix<float> NorthEast =>
             new float[,]
             {
                { 0,  1,  2 },
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ScharrKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/ScharrKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/ScharrKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/ScharrKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/SobelKernels.cs b/src/ImageSharp/Processing/Processors/Convolution/Kernels/SobelKernels.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/SobelKernels.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Kernels/SobelKernels.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
index c3188676f3..fc73903c7d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
@@ -1,20 +1,16 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Kirsch operator filter. <see href="http://en.wikipedia.org/wiki/Kirsch_operator"/>
+    /// Defines edge detection using the Kirsch operator filter.
+    /// See <see href="http://en.wikipedia.org/wiki/Kirsch_operator"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class KirschProcessor<TPixel> : EdgeDetectorCompassProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class KirschProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="KirschProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="KirschProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public KirschProcessor(bool grayscale)
@@ -22,28 +18,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
         }
 
-        /// <inheritdoc/>
-        public override DenseMatrix<float> North => KirschKernels.KirschNorth;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> NorthWest => KirschKernels.KirschNorthWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> West => KirschKernels.KirschWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> SouthWest => KirschKernels.KirschSouthWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> South => KirschKernels.KirschSouth;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> SouthEast => KirschKernels.KirschSouthEast;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> East => KirschKernels.KirschEast;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> NorthEast => KirschKernels.KirschNorthEast;
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetectorCompassProcessor<TPixel>(new KirschKernels(), this.Grayscale);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs b/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
index f498d374cc..18a53cb131 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
@@ -9,17 +9,21 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Applies edge detection processing to the image using the Laplacian 3x3 operator filter.
     /// <see href="http://en.wikipedia.org/wiki/Discrete_Laplace_operator"/>
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class Laplacian3x3Processor<TPixel> : EdgeDetectorProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    public class Laplacian3x3Processor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="Laplacian3x3Processor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Laplacian3x3Processor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public Laplacian3x3Processor(bool grayscale)
-            : base(LaplacianKernels.Laplacian3x3, grayscale)
+            : base(grayscale)
         {
         }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetectorProcessor<TPixel>(LaplacianKernels.Laplacian3x3, this.Grayscale);
+        }
     }
 }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs b/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
index 558acf7b35..1c95ca4903 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
@@ -1,25 +1,27 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Laplacian 5x5 operator filter.
-    /// <see href="http://en.wikipedia.org/wiki/Discrete_Laplace_operator"/>
+    /// Defines edge detection processing using the Laplacian 5x5 operator filter.
+    /// <see href="http://en.wikipedia.org/wiki/Discrete_Laplace_operator"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class Laplacian5x5Processor<TPixel> : EdgeDetectorProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class Laplacian5x5Processor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="Laplacian5x5Processor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Laplacian5x5Processor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public Laplacian5x5Processor(bool grayscale)
-            : base(LaplacianKernels.Laplacian5x5, grayscale)
+            : base(grayscale)
+        {
+        }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
+            return new EdgeDetectorProcessor<TPixel>(LaplacianKernels.Laplacian5x5, this.Grayscale);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
index 6cc65dc587..d904d69b1b 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
@@ -1,25 +1,27 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
     /// Applies edge detection processing to the image using the Laplacian of Gaussian operator filter.
-    /// <see href="http://fourier.eng.hmc.edu/e161/lectures/gradient/node8.html"/>
+    /// See <see href="http://fourier.eng.hmc.edu/e161/lectures/gradient/node8.html"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class LaplacianOfGaussianProcessor<TPixel> : EdgeDetectorProcessor<TPixel>
-          where TPixel : struct, IPixel<TPixel>
+    public class LaplacianOfGaussianProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="LaplacianOfGaussianProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="LaplacianOfGaussianProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public LaplacianOfGaussianProcessor(bool grayscale)
-            : base(LaplacianKernels.LaplacianOfGaussianXY, grayscale)
+            : base(grayscale)
+        {
+        }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
+            return new EdgeDetectorProcessor<TPixel>(LaplacianKernels.LaplacianOfGaussianXY, this.Grayscale);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
index 75ef4dac62..939b1e0c52 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
@@ -1,25 +1,27 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Prewitt operator filter.
-    /// <see href="http://en.wikipedia.org/wiki/Prewitt_operator"/>
+    /// Defines edge detection using the Prewitt operator filter.
+    /// See <see href="http://en.wikipedia.org/wiki/Prewitt_operator"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class PrewittProcessor<TPixel> : EdgeDetector2DProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class PrewittProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="PrewittProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PrewittProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public PrewittProcessor(bool grayscale)
-            : base(PrewittKernels.PrewittX, PrewittKernels.PrewittY, grayscale)
+            : base(grayscale)
+        {
+        }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
+            return new EdgeDetector2DProcessor<TPixel>(PrewittKernels.PrewittX, PrewittKernels.PrewittY, this.Grayscale);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
index d685860f62..ff41b6c694 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
@@ -6,20 +6,24 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Roberts Cross operator filter.
-    /// <see href="http://en.wikipedia.org/wiki/Roberts_cross"/>
+    /// Defines edge detection processing using the Roberts Cross operator filter.
+    /// See <see href="http://en.wikipedia.org/wiki/Roberts_cross"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class RobertsCrossProcessor<TPixel> : EdgeDetector2DProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    public class RobertsCrossProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="RobertsCrossProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="RobertsCrossProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public RobertsCrossProcessor(bool grayscale)
-            : base(RobertsCrossKernels.RobertsCrossX, RobertsCrossKernels.RobertsCrossY, grayscale)
+            : base(grayscale)
         {
         }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetector2DProcessor<TPixel>(RobertsCrossKernels.RobertsCrossX, RobertsCrossKernels.RobertsCrossY, this.Grayscale);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
index 193c1008dd..603a81f676 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
@@ -7,15 +7,13 @@ using SixLabors.ImageSharp.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Robinson operator filter.
-    /// <see href="http://www.tutorialspoint.com/dip/Robinson_Compass_Mask.htm"/>
+    /// Defines edge detection using the Robinson operator filter.
+    /// See <see href="http://www.tutorialspoint.com/dip/Robinson_Compass_Mask.htm"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class RobinsonProcessor<TPixel> : EdgeDetectorCompassProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    internal class RobinsonProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="RobinsonProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="RobinsonProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public RobinsonProcessor(bool grayscale)
@@ -23,28 +21,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
         }
 
-        /// <inheritdoc/>
-        public override DenseMatrix<float> North => RobinsonKernels.RobinsonNorth;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> NorthWest => RobinsonKernels.RobinsonNorthWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> West => RobinsonKernels.RobinsonWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> SouthWest => RobinsonKernels.RobinsonSouthWest;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> South => RobinsonKernels.RobinsonSouth;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> SouthEast => RobinsonKernels.RobinsonSouthEast;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> East => RobinsonKernels.RobinsonEast;
-
-        /// <inheritdoc/>
-        public override DenseMatrix<float> NorthEast => RobinsonKernels.RobinsonNorthEast;
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetectorCompassProcessor<TPixel>(new RobinsonKernels(), this.Grayscale);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
index 79fc0e79fc..d23ba53384 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
@@ -6,20 +6,24 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// Applies edge detection processing to the image using the Scharr operator filter.
+    /// Defines edge detection processing using the Scharr operator filter.
     /// <see href="http://en.wikipedia.org/wiki/Sobel_operator#Alternative_operators"/>
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ScharrProcessor<TPixel> : EdgeDetector2DProcessor<TPixel>
-          where TPixel : struct, IPixel<TPixel>
+    public class ScharrProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ScharrProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ScharrProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public ScharrProcessor(bool grayscale)
-            : base(ScharrKernels.ScharrX, ScharrKernels.ScharrY, grayscale)
+            : base(grayscale)
         {
         }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetector2DProcessor<TPixel>(ScharrKernels.ScharrX, ScharrKernels.ScharrY, this.Grayscale);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
index 3ca53f6f0f..157bb62e50 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
@@ -2,24 +2,37 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution
 {
     /// <summary>
-    /// The Sobel operator filter.
-    /// <see href="http://en.wikipedia.org/wiki/Sobel_operator"/>
+    /// Defines edge detection using the Sobel operator filter.
+    /// See <see href="http://en.wikipedia.org/wiki/Sobel_operator"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class SobelProcessor<TPixel> : EdgeDetector2DProcessor<TPixel>
-         where TPixel : struct, IPixel<TPixel>
+    public class SobelProcessor : EdgeDetectorProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="SobelProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SobelProcessor"/> class.
         /// </summary>
         /// <param name="grayscale">Whether to convert the image to grayscale before performing edge detection.</param>
         public SobelProcessor(bool grayscale)
-            : base(SobelKernels.SobelX, SobelKernels.SobelY, grayscale)
+            : base(grayscale)
         {
         }
+
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+        {
+            return new EdgeDetector2DProcessor<TPixel>(SobelKernels.SobelX, SobelKernels.SobelY, this.Grayscale);
+        }
+
+        // TODO: Move this to an appropriate extension method if possible.
+        internal void ApplyToFrame<TPixel>(ImageFrame<TPixel> frame, Rectangle sourceRectangle, Configuration configuration)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var processorImpl = new EdgeDetector2DProcessor<TPixel>(SobelKernels.SobelX, SobelKernels.SobelY, this.Grayscale);
+            processorImpl.Apply(frame, sourceRectangle, configuration);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
index 6de717afd9..0e744dd963 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 Configuration configuration = source.GetConfiguration();
 
                 // Detect the edges.
-                new SobelProcessor<TPixel>(false).Apply(temp, sourceRectangle, configuration);
+                new SobelProcessor(false).ApplyToFrame(temp, sourceRectangle, configuration);
 
                 // Apply threshold binarization filter.
                 new BinaryThresholdProcessor<TPixel>(this.Threshold).Apply(temp, sourceRectangle, configuration);
diff --git a/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs b/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
index cf5feac275..07b9b1b8c6 100644
--- a/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs
@@ -21,8 +21,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
             this.operations.DetectEdges();
 
             // TODO: Enable once we have updated the images
-            // SobelProcessor<Rgba32> processor = this.Verify<SobelProcessor<Rgba32>>();
-            // Assert.True(processor.Grayscale);
+            SobelProcessor processor = this.Verify<SobelProcessor>();
+            Assert.True(processor.Grayscale);
         }
 
         [Fact]
@@ -31,45 +31,45 @@ namespace SixLabors.ImageSharp.Tests.Processing.Convolution
             this.operations.DetectEdges(this.rect);
 
             // TODO: Enable once we have updated the images
-            // SobelProcessor<Rgba32> processor = this.Verify<SobelProcessor<Rgba32>>(this.rect);
-            // Assert.True(processor.Grayscale);
+            SobelProcessor processor = this.Verify<SobelProcessor>(this.rect);
+            Assert.True(processor.Grayscale);
         }
         public static IEnumerable<object[]> EdgeDetectionTheoryData => new[] {
-            new object[]{ new TestType<KayyaliProcessor<Rgba32>>(), EdgeDetectionOperators.Kayyali },
-            new object[]{ new TestType<KirschProcessor<Rgba32>>(), EdgeDetectionOperators.Kirsch },
-            new object[]{ new TestType<Laplacian3x3Processor<Rgba32>>(), EdgeDetectionOperators.Laplacian3x3 },
-            new object[]{ new TestType<Laplacian5x5Processor<Rgba32>>(), EdgeDetectionOperators.Laplacian5x5 },
-            new object[]{ new TestType<LaplacianOfGaussianProcessor<Rgba32>>(), EdgeDetectionOperators.LaplacianOfGaussian },
-            new object[]{ new TestType<PrewittProcessor<Rgba32>>(), EdgeDetectionOperators.Prewitt },
-            new object[]{ new TestType<RobertsCrossProcessor<Rgba32>>(), EdgeDetectionOperators.RobertsCross },
-            new object[]{ new TestType<RobinsonProcessor<Rgba32>>(), EdgeDetectionOperators.Robinson },
-            new object[]{ new TestType<ScharrProcessor<Rgba32>>(), EdgeDetectionOperators.Scharr },
-            new object[]{ new TestType<SobelProcessor<Rgba32>>(), EdgeDetectionOperators.Sobel },
+            new object[]{ new TestType<KayyaliProcessor>(), EdgeDetectionOperators.Kayyali },
+            new object[]{ new TestType<KirschProcessor>(), EdgeDetectionOperators.Kirsch },
+            new object[]{ new TestType<Laplacian3x3Processor>(), EdgeDetectionOperators.Laplacian3x3 },
+            new object[]{ new TestType<Laplacian5x5Processor>(), EdgeDetectionOperators.Laplacian5x5 },
+            new object[]{ new TestType<LaplacianOfGaussianProcessor>(), EdgeDetectionOperators.LaplacianOfGaussian },
+            new object[]{ new TestType<PrewittProcessor>(), EdgeDetectionOperators.Prewitt },
+            new object[]{ new TestType<RobertsCrossProcessor>(), EdgeDetectionOperators.RobertsCross },
+            new object[]{ new TestType<RobinsonProcessor>(), EdgeDetectionOperators.Robinson },
+            new object[]{ new TestType<ScharrProcessor>(), EdgeDetectionOperators.Scharr },
+            new object[]{ new TestType<SobelProcessor>(), EdgeDetectionOperators.Sobel },
         };
 
         [Theory]
         [MemberData(nameof(EdgeDetectionTheoryData))]
         public void DetectEdges_filter_SobelProcessorDefaultsSet<TProcessor>(TestType<TProcessor> type, EdgeDetectionOperators filter)
-            where TProcessor : IImageProcessor<Rgba32>
+            where TProcessor : EdgeDetectorProcessor
         {
             this.operations.DetectEdges(filter);
 
             // TODO: Enable once we have updated the images
-            // var processor = this.Verify<TProcessor>();
-            // Assert.True(processor.Grayscale);
+            var processor = this.Verify<TProcessor>();
+            Assert.True(processor.Grayscale);
         }
 
         [Theory]
         [MemberData(nameof(EdgeDetectionTheoryData))]
         public void DetectEdges_filter_grayscale_SobelProcessorDefaultsSet<TProcessor>(TestType<TProcessor> type, EdgeDetectionOperators filter)
-            where TProcessor : IImageProcessor<Rgba32>
+            where TProcessor : EdgeDetectorProcessor
         {
             bool grey = (int)filter % 2 == 0;
             this.operations.DetectEdges(filter, grey);
 
             // TODO: Enable once we have updated the images
-            // var processor = this.Verify<TProcessor>()
-            // Assert.Equal(grey, processor.Grayscale);
+            var processor = this.Verify<TProcessor>();
+            Assert.Equal(grey, processor.Grayscale);
         }
     }
 }
\ No newline at end of file

From e53e0dc9c3da1e15c3c5861fc8ae892112a98b28 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 01:36:44 +0200
Subject: [PATCH 129/223] refactor Effects processors

---
 .../Processing/OilPaintExtensions.cs          |  31 ++---
 .../Processing/PixelateExtensions.cs          |  23 ++--
 .../Processors/Dithering/ErrorDiffuserBase.cs |   6 +-
 .../Effects/OilPaintingProcessor.cs           | 119 ++--------------
 .../Effects/OilPaintingProcessor{TPixel}.cs   | 129 ++++++++++++++++++
 .../Processors/Effects/PixelateProcessor.cs   |  91 +-----------
 .../Effects/PixelateProcessor{TPixel}.cs      | 111 +++++++++++++++
 .../Processing/Effects/OilPaintTest.cs        |   8 +-
 .../Processing/Effects/PixelateTest.cs        |   6 +-
 9 files changed, 288 insertions(+), 236 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Effects/PixelateProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Processing/OilPaintExtensions.cs b/src/ImageSharp/Processing/OilPaintExtensions.cs
index b6fa4149a6..ee51b31fab 100644
--- a/src/ImageSharp/Processing/OilPaintExtensions.cs
+++ b/src/ImageSharp/Processing/OilPaintExtensions.cs
@@ -1,14 +1,13 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Effects;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds oil painting effect extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds oil painting effect extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class OilPaintExtensions
     {
@@ -16,43 +15,36 @@ namespace SixLabors.ImageSharp.Processing
         /// Alters the colors of the image recreating an oil painting effect with levels and brushSize
         /// set to <value>10</value> and <value>15</value> respectively.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> OilPaint<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => OilPaint(source, 10, 15);
+        public static IImageProcessingContext OilPaint(this IImageProcessingContext source) => OilPaint(source, 10, 15);
 
         /// <summary>
         /// Alters the colors of the image recreating an oil painting effect  with levels and brushSize
         /// set to <value>10</value> and <value>15</value> respectively.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> OilPaint<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => OilPaint(source, 10, 15, rectangle);
+        public static IImageProcessingContext OilPaint(this IImageProcessingContext source, Rectangle rectangle) =>
+            OilPaint(source, 10, 15, rectangle);
 
         /// <summary>
         /// Alters the colors of the image recreating an oil painting effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="levels">The number of intensity levels. Higher values result in a broader range of color intensities forming part of the result image.</param>
         /// <param name="brushSize">The number of neighboring pixels used in calculating each individual pixel value.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> OilPaint<TPixel>(this IImageProcessingContext<TPixel> source, int levels, int brushSize)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OilPaintingProcessor<TPixel>(levels, brushSize));
+        public static IImageProcessingContext
+            OilPaint(this IImageProcessingContext source, int levels, int brushSize) =>
+            source.ApplyProcessor(new OilPaintingProcessor(levels, brushSize));
 
         /// <summary>
         /// Alters the colors of the image recreating an oil painting effect.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="levels">The number of intensity levels. Higher values result in a broader range of color intensities forming part of the result image.</param>
         /// <param name="brushSize">The number of neighboring pixels used in calculating each individual pixel value.</param>
@@ -60,8 +52,11 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> OilPaint<TPixel>(this IImageProcessingContext<TPixel> source, int levels, int brushSize, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OilPaintingProcessor<TPixel>(levels, brushSize), rectangle);
+        public static IImageProcessingContext OilPaint(
+            this IImageProcessingContext source,
+            int levels,
+            int brushSize,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new OilPaintingProcessor(levels, brushSize), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/PixelateExtensions.cs b/src/ImageSharp/Processing/PixelateExtensions.cs
index 4507f63923..d9f7f9be50 100644
--- a/src/ImageSharp/Processing/PixelateExtensions.cs
+++ b/src/ImageSharp/Processing/PixelateExtensions.cs
@@ -1,50 +1,45 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Effects;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds pixelation effect extensions to the <see cref="Image{TPixel}"/> type.
+    /// Adds pixelation effect extensions to the <see cref="Image"/> type.
     /// </summary>
     public static class PixelateExtensions
     {
         /// <summary>
         /// Pixelates an image with the given pixel size.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Pixelate<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Pixelate(source, 4);
+        public static IImageProcessingContext Pixelate(this IImageProcessingContext source) => Pixelate(source, 4);
 
         /// <summary>
         /// Pixelates an image with the given pixel size.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="size">The size of the pixels.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Pixelate<TPixel>(this IImageProcessingContext<TPixel> source, int size)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new PixelateProcessor<TPixel>(size));
+        public static IImageProcessingContext Pixelate(this IImageProcessingContext source, int size) =>
+            source.ApplyProcessor(new PixelateProcessor(size));
 
         /// <summary>
         /// Pixelates an image with the given pixel size.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="size">The size of the pixels.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Pixelate<TPixel>(this IImageProcessingContext<TPixel> source, int size, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new PixelateProcessor<TPixel>(size), rectangle);
+        public static IImageProcessingContext Pixelate(
+            this IImageProcessingContext source,
+            int size,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new PixelateProcessor(size), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
index abf5dce184..327828c39e 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
@@ -21,12 +21,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         private readonly Vector4 divisorVector;
 
         /// <summary>
-        /// The matrix width
+        /// The matrix width.
         /// </summary>
         private readonly int matrixHeight;
 
         /// <summary>
-        /// The matrix height
+        /// The matrix height.
         /// </summary>
         private readonly int matrixWidth;
 
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         private readonly int startingOffset;
 
         /// <summary>
-        /// The diffusion matrix
+        /// The diffusion matrix.
         /// </summary>
         private readonly DenseMatrix<float> matrix;
 
diff --git a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
index 1b17c470ed..14e164fb77 100644
--- a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
@@ -1,27 +1,17 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Numerics;
-
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Effects
 {
     /// <summary>
-    /// Applies oil painting effect processing to the image.
+    /// Defines an oil painting effect.
     /// </summary>
-    /// <remarks>Adapted from <see href="https://softwarebydefault.com/2013/06/29/oil-painting-cartoon-filter/"/> by Dewald Esterhuizen.</remarks>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class OilPaintingProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class OilPaintingProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="OilPaintingProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="OilPaintingProcessor"/> class.
         /// </summary>
         /// <param name="levels">
         /// The number of intensity levels. Higher values result in a broader range of color intensities forming part of the result image.
@@ -39,111 +29,20 @@ namespace SixLabors.ImageSharp.Processing.Processors.Effects
         }
 
         /// <summary>
-        /// Gets the intensity levels
+        /// Gets the number of intensity levels.
         /// </summary>
         public int Levels { get; }
 
         /// <summary>
-        /// Gets the brush size
+        /// Gets the brush size.
         /// </summary>
         public int BrushSize { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(
-            ImageFrame<TPixel> source,
-            Rectangle sourceRectangle,
-            Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            if (this.BrushSize <= 0 || this.BrushSize > source.Height || this.BrushSize > source.Width)
-            {
-                throw new ArgumentOutOfRangeException(nameof(this.BrushSize));
-            }
-
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-            int maxY = endY - 1;
-            int maxX = endX - 1;
-
-            int radius = this.BrushSize >> 1;
-            int levels = this.Levels;
-
-            using (Buffer2D<TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Size()))
-            {
-                source.CopyTo(targetPixels);
-
-                var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
-                ParallelHelper.IterateRows(
-                    workingRect,
-                    configuration,
-                    rows =>
-                        {
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
-                                Span<TPixel> targetRow = targetPixels.GetRowSpan(y);
-
-                                for (int x = startX; x < endX; x++)
-                                {
-                                    int maxIntensity = 0;
-                                    int maxIndex = 0;
-
-                                    int[] intensityBin = new int[levels];
-                                    float[] redBin = new float[levels];
-                                    float[] blueBin = new float[levels];
-                                    float[] greenBin = new float[levels];
-
-                                    for (int fy = 0; fy <= radius; fy++)
-                                    {
-                                        int fyr = fy - radius;
-                                        int offsetY = y + fyr;
-
-                                        offsetY = offsetY.Clamp(0, maxY);
-
-                                        Span<TPixel> sourceOffsetRow = source.GetPixelRowSpan(offsetY);
-
-                                        for (int fx = 0; fx <= radius; fx++)
-                                        {
-                                            int fxr = fx - radius;
-                                            int offsetX = x + fxr;
-                                            offsetX = offsetX.Clamp(0, maxX);
-
-                                            var vector = sourceOffsetRow[offsetX].ToVector4();
-
-                                            float sourceRed = vector.X;
-                                            float sourceBlue = vector.Z;
-                                            float sourceGreen = vector.Y;
-
-                                            int currentIntensity = (int)MathF.Round(
-                                                (sourceBlue + sourceGreen + sourceRed) / 3F * (levels - 1));
-
-                                            intensityBin[currentIntensity]++;
-                                            blueBin[currentIntensity] += sourceBlue;
-                                            greenBin[currentIntensity] += sourceGreen;
-                                            redBin[currentIntensity] += sourceRed;
-
-                                            if (intensityBin[currentIntensity] > maxIntensity)
-                                            {
-                                                maxIntensity = intensityBin[currentIntensity];
-                                                maxIndex = currentIntensity;
-                                            }
-                                        }
-
-                                        float red = MathF.Abs(redBin[maxIndex] / maxIntensity);
-                                        float green = MathF.Abs(greenBin[maxIndex] / maxIntensity);
-                                        float blue = MathF.Abs(blueBin[maxIndex] / maxIntensity);
-
-                                        ref TPixel pixel = ref targetRow[x];
-                                        pixel.FromVector4(
-                                            new Vector4(red, green, blue, sourceRow[x].ToVector4().W));
-                                    }
-                                }
-                            }
-                        });
-
-                Buffer2D<TPixel>.SwapOrCopyContent(source.PixelBuffer, targetPixels);
-            }
+            return new OilPaintingProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
new file mode 100644
index 0000000000..9775e5ca93
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
@@ -0,0 +1,129 @@
+// Copyright (c) Six Labors and contributors.
+/// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Effects
+{
+    /// <summary>
+    /// Applies oil painting effect processing to the image.
+    /// </summary>
+    /// <remarks>Adapted from <see href="https://softwarebydefault.com/2013/06/29/oil-painting-cartoon-filter/"/> by Dewald Esterhuizen.</remarks>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class OilPaintingProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly OilPaintingProcessor definition;
+
+        public OilPaintingProcessor(OilPaintingProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            int brushSize = this.definition.BrushSize;
+            if (brushSize <= 0 || brushSize > source.Height || brushSize > source.Width)
+            {
+                throw new ArgumentOutOfRangeException(nameof(brushSize));
+            }
+
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+            int maxY = endY - 1;
+            int maxX = endX - 1;
+
+            int radius = brushSize >> 1;
+            int levels = this.definition.Levels;
+
+            using (Buffer2D<TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Size()))
+            {
+                source.CopyTo(targetPixels);
+
+                var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                        {
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
+                                Span<TPixel> targetRow = targetPixels.GetRowSpan(y);
+
+                                for (int x = startX; x < endX; x++)
+                                {
+                                    int maxIntensity = 0;
+                                    int maxIndex = 0;
+
+                                    int[] intensityBin = new int[levels];
+                                    float[] redBin = new float[levels];
+                                    float[] blueBin = new float[levels];
+                                    float[] greenBin = new float[levels];
+
+                                    for (int fy = 0; fy <= radius; fy++)
+                                    {
+                                        int fyr = fy - radius;
+                                        int offsetY = y + fyr;
+
+                                        offsetY = offsetY.Clamp(0, maxY);
+
+                                        Span<TPixel> sourceOffsetRow = source.GetPixelRowSpan(offsetY);
+
+                                        for (int fx = 0; fx <= radius; fx++)
+                                        {
+                                            int fxr = fx - radius;
+                                            int offsetX = x + fxr;
+                                            offsetX = offsetX.Clamp(0, maxX);
+
+                                            var vector = sourceOffsetRow[offsetX].ToVector4();
+
+                                            float sourceRed = vector.X;
+                                            float sourceBlue = vector.Z;
+                                            float sourceGreen = vector.Y;
+
+                                            int currentIntensity = (int)MathF.Round(
+                                                (sourceBlue + sourceGreen + sourceRed) / 3F * (levels - 1));
+
+                                            intensityBin[currentIntensity]++;
+                                            blueBin[currentIntensity] += sourceBlue;
+                                            greenBin[currentIntensity] += sourceGreen;
+                                            redBin[currentIntensity] += sourceRed;
+
+                                            if (intensityBin[currentIntensity] > maxIntensity)
+                                            {
+                                                maxIntensity = intensityBin[currentIntensity];
+                                                maxIndex = currentIntensity;
+                                            }
+                                        }
+
+                                        float red = MathF.Abs(redBin[maxIndex] / maxIntensity);
+                                        float green = MathF.Abs(greenBin[maxIndex] / maxIntensity);
+                                        float blue = MathF.Abs(blueBin[maxIndex] / maxIntensity);
+
+                                        ref TPixel pixel = ref targetRow[x];
+                                        pixel.FromVector4(
+                                            new Vector4(red, green, blue, sourceRow[x].ToVector4().W));
+                                    }
+                                }
+                            }
+                        });
+
+                Buffer2D<TPixel>.SwapOrCopyContent(source.PixelBuffer, targetPixels);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
index 50f76efed7..eeb2aafcb5 100644
--- a/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
@@ -1,25 +1,17 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Common;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Effects
 {
     /// <summary>
-    /// Applies a pixelation effect processing to the image.
+    /// Defines a pixelation effect of a given size.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class PixelateProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class PixelateProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="PixelateProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PixelateProcessor"/> class.
         /// </summary>
         /// <param name="size">The size of the pixels. Must be greater than 0.</param>
         /// <exception cref="System.ArgumentException">
@@ -36,80 +28,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Effects
         /// </summary>
         public int Size { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            if (this.Size <= 0 || this.Size > source.Height || this.Size > source.Width)
-            {
-                throw new ArgumentOutOfRangeException(nameof(this.Size));
-            }
-
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-            int size = this.Size;
-            int offset = this.Size / 2;
-
-            // Align start/end positions.
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(source.Width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(source.Height, endY);
-
-            // Reset offset if necessary.
-            if (minX > 0)
-            {
-                startX = 0;
-            }
-
-            if (minY > 0)
-            {
-                startY = 0;
-            }
-
-            // Get the range on the y-plane to choose from.
-            IEnumerable<int> range = EnumerableExtensions.SteppedRange(minY, i => i < maxY, size);
-
-            Parallel.ForEach(
-                range,
-                configuration.GetParallelOptions(),
-                y =>
-                    {
-                        int offsetY = y - startY;
-                        int offsetPy = offset;
-
-                        // Make sure that the offset is within the boundary of the image.
-                        while (offsetY + offsetPy >= maxY)
-                        {
-                            offsetPy--;
-                        }
-
-                        Span<TPixel> row = source.GetPixelRowSpan(offsetY + offsetPy);
-
-                        for (int x = minX; x < maxX; x += size)
-                        {
-                            int offsetX = x - startX;
-                            int offsetPx = offset;
-
-                            while (x + offsetPx >= maxX)
-                            {
-                                offsetPx--;
-                            }
-
-                            // Get the pixel color in the centre of the soon to be pixelated area.
-                            TPixel pixel = row[offsetX + offsetPx];
-
-                            // For each pixel in the pixelate size, set it to the centre color.
-                            for (int l = offsetY; l < offsetY + size && l < maxY; l++)
-                            {
-                                for (int k = offsetX; k < offsetX + size && k < maxX; k++)
-                                {
-                                    source[k, l] = pixel;
-                                }
-                            }
-                        }
-                    });
+            return new PixelateProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor{TPixel}.cs
new file mode 100644
index 0000000000..21f3bb774d
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor{TPixel}.cs
@@ -0,0 +1,111 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Common;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Effects
+{
+    /// <summary>
+    /// Applies a pixelation effect processing to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class PixelateProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly PixelateProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PixelateProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="PixelateProcessor"/>.</param>
+        public PixelateProcessor(PixelateProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        private int Size => this.definition.Size;
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            if (this.Size <= 0 || this.Size > source.Height || this.Size > source.Width)
+            {
+                throw new ArgumentOutOfRangeException(nameof(this.Size));
+            }
+
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+            int size = this.Size;
+            int offset = this.Size / 2;
+
+            // Align start/end positions.
+            int minX = Math.Max(0, startX);
+            int maxX = Math.Min(source.Width, endX);
+            int minY = Math.Max(0, startY);
+            int maxY = Math.Min(source.Height, endY);
+
+            // Reset offset if necessary.
+            if (minX > 0)
+            {
+                startX = 0;
+            }
+
+            if (minY > 0)
+            {
+                startY = 0;
+            }
+
+            // Get the range on the y-plane to choose from.
+            IEnumerable<int> range = EnumerableExtensions.SteppedRange(minY, i => i < maxY, size);
+
+            Parallel.ForEach(
+                range,
+                configuration.GetParallelOptions(),
+                y =>
+                    {
+                        int offsetY = y - startY;
+                        int offsetPy = offset;
+
+                        // Make sure that the offset is within the boundary of the image.
+                        while (offsetY + offsetPy >= maxY)
+                        {
+                            offsetPy--;
+                        }
+
+                        Span<TPixel> row = source.GetPixelRowSpan(offsetY + offsetPy);
+
+                        for (int x = minX; x < maxX; x += size)
+                        {
+                            int offsetX = x - startX;
+                            int offsetPx = offset;
+
+                            while (x + offsetPx >= maxX)
+                            {
+                                offsetPx--;
+                            }
+
+                            // Get the pixel color in the centre of the soon to be pixelated area.
+                            TPixel pixel = row[offsetX + offsetPx];
+
+                            // For each pixel in the pixelate size, set it to the centre color.
+                            for (int l = offsetY; l < offsetY + size && l < maxY; l++)
+                            {
+                                for (int k = offsetX; k < offsetX + size && k < maxX; k++)
+                                {
+                                    source[k, l] = pixel;
+                                }
+                            }
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Effects/OilPaintTest.cs b/tests/ImageSharp.Tests/Processing/Effects/OilPaintTest.cs
index 9cd24fc6d1..6e1ee40f56 100644
--- a/tests/ImageSharp.Tests/Processing/Effects/OilPaintTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Effects/OilPaintTest.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void OilPaint_OilPaintingProcessorDefaultsSet()
         {
             this.operations.OilPaint();
-            var processor = this.Verify<OilPaintingProcessor<Rgba32>>();
+            var processor = this.Verify<OilPaintingProcessor>();
 
             Assert.Equal(10, processor.Levels);
             Assert.Equal(15, processor.BrushSize);
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void OilPaint_rect_OilPaintingProcessorDefaultsSet()
         {
             this.operations.OilPaint(this.rect);
-            var processor = this.Verify<OilPaintingProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<OilPaintingProcessor>(this.rect);
 
             Assert.Equal(10, processor.Levels);
             Assert.Equal(15, processor.BrushSize);
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void OilPaint_Levels_Brsuh_OilPaintingProcessorDefaultsSet()
         {
             this.operations.OilPaint(34, 65);
-            var processor = this.Verify<OilPaintingProcessor<Rgba32>>();
+            var processor = this.Verify<OilPaintingProcessor>();
 
             Assert.Equal(34, processor.Levels);
             Assert.Equal(65, processor.BrushSize);
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void OilPaint_Levels_Brsuh_rect_OilPaintingProcessorDefaultsSet()
         {
             this.operations.OilPaint(54, 43, this.rect);
-            var processor = this.Verify<OilPaintingProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<OilPaintingProcessor>(this.rect);
 
             Assert.Equal(54, processor.Levels);
             Assert.Equal(43, processor.BrushSize);
diff --git a/tests/ImageSharp.Tests/Processing/Effects/PixelateTest.cs b/tests/ImageSharp.Tests/Processing/Effects/PixelateTest.cs
index a93eaf0bc6..d8ce291707 100644
--- a/tests/ImageSharp.Tests/Processing/Effects/PixelateTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Effects/PixelateTest.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void Pixelate_PixelateProcessorDefaultsSet()
         {
             this.operations.Pixelate();
-            var processor = this.Verify<PixelateProcessor<Rgba32>>();
+            var processor = this.Verify<PixelateProcessor>();
 
             Assert.Equal(4, processor.Size);
         }
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void Pixelate_Size_PixelateProcessorDefaultsSet()
         {
             this.operations.Pixelate(12);
-            var processor = this.Verify<PixelateProcessor<Rgba32>>();
+            var processor = this.Verify<PixelateProcessor>();
 
             Assert.Equal(12, processor.Size);
         }
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         public void Pixelate_Size_rect_PixelateProcessorDefaultsSet()
         {
             this.operations.Pixelate(23, this.rect);
-            var processor = this.Verify<PixelateProcessor<Rgba32>>(this.rect);
+            var processor = this.Verify<PixelateProcessor>(this.rect);
 
             Assert.Equal(23, processor.Size);
         }

From 3c7988cef6e14711661707ae3cccb81016b28161 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 02:27:36 +0200
Subject: [PATCH 130/223] Finished refactoring transforms

---
 src/ImageSharp/Processing/CropExtensions.cs   |  15 +-
 .../Processing/EntropyCropExtensions.cs       |  19 +-
 src/ImageSharp/Processing/FlipExtensions.cs   |   9 +-
 .../Effects/OilPaintingProcessor{TPixel}.cs   |   2 +-
 .../Transforms/AffineTransformProcessor.cs    | 106 +--------
 .../AffineTransformProcessor{TPixel}.cs       | 127 +++++++++++
 .../Transforms/AutoOrientProcessor.cs         |  92 +-------
 .../Transforms/AutoOrientProcessor{TPixel}.cs | 103 +++++++++
 .../Processors/Transforms/CropProcessor.cs    |  59 +----
 .../Transforms/CropProcessor{TPixel}.cs       |  75 ++++++
 .../Transforms/EntropyCropProcessor.cs        |  46 +---
 .../EntropyCropProcessor{TPixel}.cs           |  59 +++++
 .../Processors/Transforms/FlipProcessor.cs    |  76 +------
 .../Transforms/FlipProcessor{TPixel}.cs       |  87 +++++++
 .../ProjectiveTransformProcessor.cs           | 109 +--------
 .../ProjectiveTransformProcessor{TPixel}.cs   | 126 ++++++++++
 .../Processors/Transforms/RotateProcessor.cs  | 207 +----------------
 .../Transforms/RotateProcessor{TPixel}.cs     | 215 ++++++++++++++++++
 .../Processors/Transforms/SkewProcessor.cs    |  10 +-
 .../Transforms/TransformProcessorBase.cs      |   2 +-
 .../Transforms/TransformProcessorHelpers.cs   |   2 +-
 src/ImageSharp/Processing/RotateExtensions.cs |  24 +-
 .../Processing/RotateFlipExtensions.cs        |   6 +-
 src/ImageSharp/Processing/SkewExtensions.cs   |  24 +-
 .../Processing/TransformExtensions.cs         |  97 ++++----
 .../ImageSharp.Tests/Drawing/DrawImageTest.cs |   3 +-
 .../Processing/Transforms/CropTest.cs         |   4 +-
 .../Processing/Transforms/EntropyCropTest.cs  |   2 +-
 .../Processing/Transforms/FlipTests.cs        |   2 +-
 .../Processing/Transforms/PadTest.cs          |   8 +-
 .../Processing/Transforms/RotateFlipTests.cs  |   4 +-
 .../Processing/Transforms/RotateTests.cs      |   4 +-
 .../Processing/Transforms/SkewTest.cs         |   2 +-
 .../Transforms/TransformsHelpersTest.cs       |   2 +-
 34 files changed, 953 insertions(+), 775 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/FlipProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Processing/CropExtensions.cs b/src/ImageSharp/Processing/CropExtensions.cs
index 1c0d80afc9..6aaff5656f 100644
--- a/src/ImageSharp/Processing/CropExtensions.cs
+++ b/src/ImageSharp/Processing/CropExtensions.cs
@@ -1,40 +1,35 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of cropping operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of cropping operations to the <see cref="Image"/> type.
     /// </summary>
     public static class CropExtensions
     {
         /// <summary>
         /// Crops an image to the given width and height.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Crop<TPixel>(this IImageProcessingContext<TPixel> source, int width, int height)
-            where TPixel : struct, IPixel<TPixel>
-            => Crop(source, new Rectangle(0, 0, width, height));
+        public static IImageProcessingContext Crop(this IImageProcessingContext source, int width, int height) =>
+            Crop(source, new Rectangle(0, 0, width, height));
 
         /// <summary>
         /// Crops an image to the given rectangle.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to crop.</param>
         /// <param name="cropRectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to retain.
         /// </param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Crop<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle cropRectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new CropProcessor<TPixel>(cropRectangle, source.GetCurrentSize()));
+        public static IImageProcessingContext Crop(this IImageProcessingContext source, Rectangle cropRectangle) =>
+            source.ApplyProcessor(new CropProcessor(cropRectangle, source.GetCurrentSize()));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/EntropyCropExtensions.cs b/src/ImageSharp/Processing/EntropyCropExtensions.cs
index 157e69ef2a..34bc5daebf 100644
--- a/src/ImageSharp/Processing/EntropyCropExtensions.cs
+++ b/src/ImageSharp/Processing/EntropyCropExtensions.cs
@@ -1,35 +1,30 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of entropy cropping operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of entropy cropping operations to the <see cref="Image"/> type.
     /// </summary>
     public static class EntropyCropExtensions
     {
         /// <summary>
         /// Crops an image to the area of greatest entropy using a threshold for entropic density of <value>.5F</value>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to crop.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> EntropyCrop<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new EntropyCropProcessor<TPixel>());
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext EntropyCrop(this IImageProcessingContext source) =>
+            source.ApplyProcessor(new EntropyCropProcessor());
 
         /// <summary>
         /// Crops an image to the area of greatest entropy.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to crop.</param>
         /// <param name="threshold">The threshold for entropic density.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> EntropyCrop<TPixel>(this IImageProcessingContext<TPixel> source, float threshold)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new EntropyCropProcessor<TPixel>(threshold));
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext EntropyCrop(this IImageProcessingContext source, float threshold) =>
+            source.ApplyProcessor(new EntropyCropProcessor(threshold));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/FlipExtensions.cs b/src/ImageSharp/Processing/FlipExtensions.cs
index dfbff7e4da..bc862972e5 100644
--- a/src/ImageSharp/Processing/FlipExtensions.cs
+++ b/src/ImageSharp/Processing/FlipExtensions.cs
@@ -1,25 +1,22 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of flipping operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of flipping operations to the <see cref="Image"/> type.
     /// </summary>
     public static class FlipExtensions
     {
         /// <summary>
         /// Flips an image by the given instructions.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to rotate, flip, or both.</param>
         /// <param name="flipMode">The <see cref="FlipMode"/> to perform the flip.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Flip<TPixel>(this IImageProcessingContext<TPixel> source, FlipMode flipMode)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new FlipProcessor<TPixel>(flipMode));
+        public static IImageProcessingContext Flip(this IImageProcessingContext source, FlipMode flipMode)
+            => source.ApplyProcessor(new FlipProcessor(flipMode));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
index 9775e5ca93..7efb71fa1c 100644
--- a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor{TPixel}.cs
@@ -1,5 +1,5 @@
 // Copyright (c) Six Labors and contributors.
-/// Licensed under the Apache License, Version 2.0.
+// Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Numerics;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
index 7633ed4418..713f042653 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor.cs
@@ -1,26 +1,20 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Numerics;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ParallelUtils;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides the base methods to perform affine transforms on an image.
+    /// Defines an affine transformation applicable on an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AffineTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class AffineTransformProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AffineTransformProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AffineTransformProcessor"/> class.
         /// </summary>
         /// <param name="matrix">The transform matrix.</param>
         /// <param name="sampler">The sampler to perform the transform operation.</param>
@@ -48,95 +42,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public Size TargetDimensions { get; }
 
-        /// <inheritdoc/>
-        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        /// <inheritdoc />
+        public virtual IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
-
-            // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(
-            ImageFrame<TPixel> source,
-            ImageFrame<TPixel> destination,
-            Rectangle sourceRectangle,
-            Configuration configuration)
-        {
-            // Handle tranforms that result in output identical to the original.
-            if (this.TransformMatrix.Equals(default) || this.TransformMatrix.Equals(Matrix3x2.Identity))
-            {
-                // The clone will be blank here copy all the pixel data over
-                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
-                return;
-            }
-
-            int width = this.TargetDimensions.Width;
-            var targetBounds = new Rectangle(Point.Empty, this.TargetDimensions);
-
-            // Convert from screen to world space.
-            Matrix3x2.Invert(this.TransformMatrix, out Matrix3x2 matrix);
-
-            if (this.Sampler is NearestNeighborResampler)
-            {
-                ParallelHelper.IterateRows(
-                    targetBounds,
-                    configuration,
-                    rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> destRow = destination.GetPixelRowSpan(y);
-
-                            for (int x = 0; x < width; x++)
-                            {
-                                var point = Point.Transform(new Point(x, y), matrix);
-                                if (sourceRectangle.Contains(point.X, point.Y))
-                                {
-                                    destRow[x] = source[point.X, point.Y];
-                                }
-                            }
-                        }
-                    });
-
-                return;
-            }
-
-            var kernel = new TransformKernelMap(configuration, source.Size(), destination.Size(), this.Sampler);
-            try
-            {
-                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
-                    targetBounds,
-                    configuration,
-                    (rows, vectorBuffer) =>
-                    {
-                        Span<Vector4> vectorSpan = vectorBuffer.Span;
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
-                            PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan, vectorSpan);
-                            ref float ySpanRef = ref kernel.GetYStartReference(y);
-                            ref float xSpanRef = ref kernel.GetXStartReference(y);
-
-                            for (int x = 0; x < width; x++)
-                            {
-                                // Use the single precision position to calculate correct bounding pixels
-                                // otherwise we get rogue pixels outside of the bounds.
-                                var point = Vector2.Transform(new Vector2(x, y), matrix);
-                                kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
-                            }
-
-                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
-                        }
-                    });
-            }
-            finally
-            {
-                kernel.Dispose();
-            }
+            return new AffineTransformProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
new file mode 100644
index 0000000000..e57ce826bd
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
@@ -0,0 +1,127 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides the base methods to perform affine transforms on an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AffineTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        public AffineTransformProcessor(AffineTransformProcessor definition)
+        {
+            this.Definition = definition;
+        }
+
+        private Size TargetDimensions => this.Definition.TargetDimensions;
+
+        private Matrix3x2 TransformMatrix => this.Definition.TransformMatrix;
+
+        protected AffineTransformProcessor Definition { get; }
+
+        /// <inheritdoc/>
+        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            // We will always be creating the clone even for mutate because we may need to resize the canvas
+            IEnumerable<ImageFrame<TPixel>> frames =
+                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
+
+            // Use the overload to prevent an extra frame being added
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            ImageFrame<TPixel> destination,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            // Handle tranforms that result in output identical to the original.
+            if (this.TransformMatrix.Equals(default) || this.TransformMatrix.Equals(Matrix3x2.Identity))
+            {
+                // The clone will be blank here copy all the pixel data over
+                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
+                return;
+            }
+
+            int width = this.TargetDimensions.Width;
+            var targetBounds = new Rectangle(Point.Empty, this.TargetDimensions);
+
+            // Convert from screen to world space.
+            Matrix3x2.Invert(this.TransformMatrix, out Matrix3x2 matrix);
+
+            var sampler = this.Definition.Sampler;
+
+            if (sampler is NearestNeighborResampler)
+            {
+                ParallelHelper.IterateRows(
+                    targetBounds,
+                    configuration,
+                    rows =>
+                        {
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> destRow = destination.GetPixelRowSpan(y);
+
+                                for (int x = 0; x < width; x++)
+                                {
+                                    var point = Point.Transform(new Point(x, y), matrix);
+                                    if (sourceRectangle.Contains(point.X, point.Y))
+                                    {
+                                        destRow[x] = source[point.X, point.Y];
+                                    }
+                                }
+                            }
+                        });
+
+                return;
+            }
+
+            var kernel = new TransformKernelMap(configuration, source.Size(), destination.Size(), sampler);
+            try
+            {
+                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
+                    targetBounds,
+                    configuration,
+                    (rows, vectorBuffer) =>
+                        {
+                            Span<Vector4> vectorSpan = vectorBuffer.Span;
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
+                                PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan, vectorSpan);
+                                ref float ySpanRef = ref kernel.GetYStartReference(y);
+                                ref float xSpanRef = ref kernel.GetXStartReference(y);
+
+                                for (int x = 0; x < width; x++)
+                                {
+                                    // Use the single precision position to calculate correct bounding pixels
+                                    // otherwise we get rogue pixels outside of the bounds.
+                                    var point = Vector2.Transform(new Vector2(x, y), matrix);
+                                    kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
+                                }
+
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
+                            }
+                        });
+            }
+            finally
+            {
+                kernel.Dispose();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
index 5b9e3dde23..9bbbba843c 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs
@@ -1,103 +1,21 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
     /// Adjusts an image so that its orientation is suitable for viewing. Adjustments are based on EXIF metadata embedded in the image.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AutoOrientProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class AutoOrientProcessor : IImageProcessor
     {
-        /// <inheritdoc/>
-        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            OrientationMode orientation = GetExifOrientation(source);
-            Size size = sourceRectangle.Size;
-            switch (orientation)
-            {
-                case OrientationMode.TopRight:
-                    new FlipProcessor<TPixel>(FlipMode.Horizontal).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.BottomRight:
-                    new RotateProcessor<TPixel>((int)RotateMode.Rotate180, size).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.BottomLeft:
-                    new FlipProcessor<TPixel>(FlipMode.Vertical).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.LeftTop:
-                    new RotateProcessor<TPixel>((int)RotateMode.Rotate90, size).Apply(source, sourceRectangle);
-                    new FlipProcessor<TPixel>(FlipMode.Horizontal).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.RightTop:
-                    new RotateProcessor<TPixel>((int)RotateMode.Rotate90, size).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.RightBottom:
-                    new FlipProcessor<TPixel>(FlipMode.Vertical).Apply(source, sourceRectangle);
-                    new RotateProcessor<TPixel>((int)RotateMode.Rotate270, size).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.LeftBottom:
-                    new RotateProcessor<TPixel>((int)RotateMode.Rotate270, size).Apply(source, sourceRectangle);
-                    break;
-
-                case OrientationMode.Unknown:
-                case OrientationMode.TopLeft:
-                default:
-                    break;
-            }
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> sourceBase, Rectangle sourceRectangle, Configuration config)
-        {
-            // All processing happens at the image level within BeforeImageApply();
-        }
-
-        /// <summary>
-        /// Returns the current EXIF orientation
-        /// </summary>
-        /// <param name="source">The image to auto rotate.</param>
-        /// <returns>The <see cref="OrientationMode"/></returns>
-        private static OrientationMode GetExifOrientation(Image<TPixel> source)
-        {
-            if (source.Metadata.ExifProfile is null)
-            {
-                return OrientationMode.Unknown;
-            }
-
-            ExifValue value = source.Metadata.ExifProfile.GetValue(ExifTag.Orientation);
-            if (value is null)
-            {
-                return OrientationMode.Unknown;
-            }
-
-            OrientationMode orientation;
-            if (value.DataType == ExifDataType.Short)
-            {
-                orientation = (OrientationMode)value.Value;
-            }
-            else
-            {
-                orientation = (OrientationMode)Convert.ToUInt16(value.Value);
-                source.Metadata.ExifProfile.RemoveValue(ExifTag.Orientation);
-            }
-
-            source.Metadata.ExifProfile.SetValue(ExifTag.Orientation, (ushort)OrientationMode.TopLeft);
-
-            return orientation;
+            return new AutoOrientProcessor<TPixel>();
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
new file mode 100644
index 0000000000..257c223dc4
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
@@ -0,0 +1,103 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Adjusts an image so that its orientation is suitable for viewing. Adjustments are based on EXIF metadata embedded in the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AutoOrientProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <inheritdoc/>
+        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            OrientationMode orientation = GetExifOrientation(source);
+            Size size = sourceRectangle.Size;
+            switch (orientation)
+            {
+                case OrientationMode.TopRight:
+                    new FlipProcessor(FlipMode.Horizontal).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.BottomRight:
+                    new RotateProcessor((int)RotateMode.Rotate180, size).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.BottomLeft:
+                    new FlipProcessor(FlipMode.Vertical).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.LeftTop:
+                    new RotateProcessor((int)RotateMode.Rotate90, size).Apply(source, sourceRectangle);
+                    new FlipProcessor(FlipMode.Horizontal).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.RightTop:
+                    new RotateProcessor((int)RotateMode.Rotate90, size).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.RightBottom:
+                    new FlipProcessor(FlipMode.Vertical).Apply(source, sourceRectangle);
+                    new RotateProcessor((int)RotateMode.Rotate270, size).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.LeftBottom:
+                    new RotateProcessor((int)RotateMode.Rotate270, size).Apply(source, sourceRectangle);
+                    break;
+
+                case OrientationMode.Unknown:
+                case OrientationMode.TopLeft:
+                default:
+                    break;
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> sourceBase, Rectangle sourceRectangle, Configuration config)
+        {
+            // All processing happens at the image level within BeforeImageApply();
+        }
+
+        /// <summary>
+        /// Returns the current EXIF orientation
+        /// </summary>
+        /// <param name="source">The image to auto rotate.</param>
+        /// <returns>The <see cref="OrientationMode"/></returns>
+        private static OrientationMode GetExifOrientation(Image<TPixel> source)
+        {
+            if (source.Metadata.ExifProfile is null)
+            {
+                return OrientationMode.Unknown;
+            }
+
+            ExifValue value = source.Metadata.ExifProfile.GetValue(ExifTag.Orientation);
+            if (value is null)
+            {
+                return OrientationMode.Unknown;
+            }
+
+            OrientationMode orientation;
+            if (value.DataType == ExifDataType.Short)
+            {
+                orientation = (OrientationMode)value.Value;
+            }
+            else
+            {
+                orientation = (OrientationMode)Convert.ToUInt16(value.Value);
+                source.Metadata.ExifProfile.RemoveValue(ExifTag.Orientation);
+            }
+
+            source.Metadata.ExifProfile.SetValue(ExifTag.Orientation, (ushort)OrientationMode.TopLeft);
+
+            return orientation;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
index 5baa196a09..76f223e038 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor.cs
@@ -1,32 +1,28 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods to allow the cropping of an image.
+    /// Defines a crop operation on an image.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class CropProcessor<TPixel> : TransformProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class CropProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="CropProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="CropProcessor"/> class.
         /// </summary>
         /// <param name="cropRectangle">The target cropped rectangle.</param>
         /// <param name="sourceSize">The source image size.</param>
         public CropProcessor(Rectangle cropRectangle, Size sourceSize)
         {
             // Check bounds here and throw if we are passed a rectangle exceeding our source bounds.
-            Guard.IsTrue(new Rectangle(Point.Empty, sourceSize).Contains(cropRectangle), nameof(cropRectangle), "Crop rectangle should be smaller than the source bounds.");
+            Guard.IsTrue(
+                new Rectangle(Point.Empty, sourceSize).Contains(cropRectangle),
+                nameof(cropRectangle),
+                "Crop rectangle should be smaller than the source bounds.");
             this.CropRectangle = cropRectangle;
         }
 
@@ -35,44 +31,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public Rectangle CropRectangle { get; }
 
-        /// <inheritdoc/>
-        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.CropRectangle.Width, this.CropRectangle.Height, x.Metadata.DeepClone()));
-
-            // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // Handle resize dimensions identical to the original
-            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.CropRectangle)
-            {
-                // the cloned will be blank here copy all the pixel data over
-                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
-                return;
-            }
-
-            Rectangle rect = this.CropRectangle;
-
-            // Copying is cheap, we should process more pixels per task:
-            ParallelExecutionSettings parallelSettings = configuration.GetParallelSettings().MultiplyMinimumPixelsPerTask(4);
-
-            ParallelHelper.IterateRows(
-                rect,
-                parallelSettings,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(rect.Left);
-                            Span<TPixel> targetRow = destination.GetPixelRowSpan(y - rect.Top);
-                            sourceRow.Slice(0, rect.Width).CopyTo(targetRow);
-                        }
-                    });
+            return new CropProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
new file mode 100644
index 0000000000..9bddda3825
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
@@ -0,0 +1,75 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides methods to allow the cropping of an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class CropProcessor<TPixel> : TransformProcessorBase<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly CropProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CropProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="CropProcessor"/>.</param>
+        public CropProcessor(CropProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        private Rectangle CropRectangle => this.definition.CropRectangle;
+
+        /// <inheritdoc/>
+        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            // We will always be creating the clone even for mutate because we may need to resize the canvas
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.CropRectangle.Width, this.CropRectangle.Height, x.Metadata.DeepClone()));
+
+            // Use the overload to prevent an extra frame being added
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        {
+            // Handle resize dimensions identical to the original
+            if (source.Width == destination.Width && source.Height == destination.Height && sourceRectangle == this.CropRectangle)
+            {
+                // the cloned will be blank here copy all the pixel data over
+                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
+                return;
+            }
+
+            Rectangle rect = this.CropRectangle;
+
+            // Copying is cheap, we should process more pixels per task:
+            ParallelExecutionSettings parallelSettings = configuration.GetParallelSettings().MultiplyMinimumPixelsPerTask(4);
+
+            ParallelHelper.IterateRows(
+                rect,
+                parallelSettings,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y).Slice(rect.Left);
+                            Span<TPixel> targetRow = destination.GetPixelRowSpan(y - rect.Top);
+                            sourceRow.Slice(0, rect.Width).CopyTo(targetRow);
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
index 0e744dd963..dee5e7fb37 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor.cs
@@ -1,31 +1,25 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Binarization;
-using SixLabors.ImageSharp.Processing.Processors.Convolution;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods to allow the cropping of an image to preserve areas of highest entropy.
+    /// Defines cropping operation that preserves areas of highest entropy.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class EntropyCropProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class EntropyCropProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="EntropyCropProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="EntropyCropProcessor"/> class.
         /// </summary>
         public EntropyCropProcessor()
-        : this(.5F)
+            : this(.5F)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="EntropyCropProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="EntropyCropProcessor"/> class.
         /// </summary>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         /// <exception cref="System.ArgumentException">
@@ -42,33 +36,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public float Threshold { get; }
 
-        /// <inheritdoc/>
-        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            Rectangle rectangle;
-
-            // All frames have be the same size so we only need to calculate the correct dimensions for the first frame
-            using (ImageFrame<TPixel> temp = source.Frames.RootFrame.Clone())
-            {
-                Configuration configuration = source.GetConfiguration();
-
-                // Detect the edges.
-                new SobelProcessor(false).ApplyToFrame(temp, sourceRectangle, configuration);
-
-                // Apply threshold binarization filter.
-                new BinaryThresholdProcessor<TPixel>(this.Threshold).Apply(temp, sourceRectangle, configuration);
-
-                // Search for the first white pixels
-                rectangle = ImageMaths.GetFilteredBoundingRectangle(temp, 0);
-            }
-
-            new CropProcessor<TPixel>(rectangle, source.Size()).Apply(source, sourceRectangle);
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // All processing happens at the image level within BeforeImageApply();
+            return new EntropyCropProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
new file mode 100644
index 0000000000..eaeb6939ec
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
@@ -0,0 +1,59 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Binarization;
+using SixLabors.ImageSharp.Processing.Processors.Convolution;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides methods to allow the cropping of an image to preserve areas of highest entropy.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class EntropyCropProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly EntropyCropProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="EntropyCropProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="definition">The <see cref="EntropyCropProcessor"/>.</param>
+        public EntropyCropProcessor(EntropyCropProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            Rectangle rectangle;
+
+            // All frames have be the same size so we only need to calculate the correct dimensions for the first frame
+            using (ImageFrame<TPixel> temp = source.Frames.RootFrame.Clone())
+            {
+                Configuration configuration = source.GetConfiguration();
+
+                // Detect the edges.
+                new SobelProcessor(false).ApplyToFrame(temp, sourceRectangle, configuration);
+
+                // Apply threshold binarization filter.
+                new BinaryThresholdProcessor<TPixel>(this.definition.Threshold).Apply(temp, sourceRectangle, configuration);
+
+                // Search for the first white pixels
+                rectangle = ImageMaths.GetFilteredBoundingRectangle(temp, 0);
+            }
+
+            new CropProcessor(rectangle, source.Size()).Apply(source, sourceRectangle);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            // All processing happens at the image level within BeforeImageApply();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
index c6f5e9d7b8..9a3eab6cc8 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
@@ -1,27 +1,17 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods that allow the flipping of an image around its center point.
+    /// Defines a flipping around the center point of the image.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class FlipProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class FlipProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="FlipProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="FlipProcessor"/> class.
         /// </summary>
         /// <param name="flipMode">The <see cref="FlipMode"/> used to perform flipping.</param>
         public FlipProcessor(FlipMode flipMode)
@@ -34,63 +24,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public FlipMode FlipMode { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            switch (this.FlipMode)
-            {
-                // No default needed as we have already set the pixels.
-                case FlipMode.Vertical:
-                    this.FlipX(source, configuration);
-                    break;
-                case FlipMode.Horizontal:
-                    this.FlipY(source, configuration);
-                    break;
-            }
-        }
-
-        /// <summary>
-        /// Swaps the image at the X-axis, which goes horizontally through the middle at half the height of the image.
-        /// </summary>
-        /// <param name="source">The source image to apply the process to.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void FlipX(ImageFrame<TPixel> source, Configuration configuration)
-        {
-            int height = source.Height;
-
-            using (IMemoryOwner<TPixel> tempBuffer = configuration.MemoryAllocator.Allocate<TPixel>(source.Width))
-            {
-                Span<TPixel> temp = tempBuffer.Memory.Span;
-
-                for (int yTop = 0; yTop < height / 2; yTop++)
-                {
-                    int yBottom = height - yTop - 1;
-                    Span<TPixel> topRow = source.GetPixelRowSpan(yBottom);
-                    Span<TPixel> bottomRow = source.GetPixelRowSpan(yTop);
-                    topRow.CopyTo(temp);
-                    bottomRow.CopyTo(topRow);
-                    temp.CopyTo(bottomRow);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Swaps the image at the Y-axis, which goes vertically through the middle at half of the width of the image.
-        /// </summary>
-        /// <param name="source">The source image to apply the process to.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void FlipY(ImageFrame<TPixel> source, Configuration configuration)
-        {
-            ParallelHelper.IterateRows(
-                source.Bounds(),
-                configuration,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            source.GetPixelRowSpan(y).Reverse();
-                        }
-                    });
+            return new FlipProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor{TPixel}.cs
new file mode 100644
index 0000000000..0247862096
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor{TPixel}.cs
@@ -0,0 +1,87 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides methods that allow the flipping of an image around its center point.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class FlipProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly FlipProcessor definition;
+
+        public FlipProcessor(FlipProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            switch (this.definition.FlipMode)
+            {
+                // No default needed as we have already set the pixels.
+                case FlipMode.Vertical:
+                    this.FlipX(source, configuration);
+                    break;
+                case FlipMode.Horizontal:
+                    this.FlipY(source, configuration);
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Swaps the image at the X-axis, which goes horizontally through the middle at half the height of the image.
+        /// </summary>
+        /// <param name="source">The source image to apply the process to.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void FlipX(ImageFrame<TPixel> source, Configuration configuration)
+        {
+            int height = source.Height;
+
+            using (IMemoryOwner<TPixel> tempBuffer = configuration.MemoryAllocator.Allocate<TPixel>(source.Width))
+            {
+                Span<TPixel> temp = tempBuffer.Memory.Span;
+
+                for (int yTop = 0; yTop < height / 2; yTop++)
+                {
+                    int yBottom = height - yTop - 1;
+                    Span<TPixel> topRow = source.GetPixelRowSpan(yBottom);
+                    Span<TPixel> bottomRow = source.GetPixelRowSpan(yTop);
+                    topRow.CopyTo(temp);
+                    bottomRow.CopyTo(topRow);
+                    temp.CopyTo(bottomRow);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Swaps the image at the Y-axis, which goes vertically through the middle at half of the width of the image.
+        /// </summary>
+        /// <param name="source">The source image to apply the process to.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void FlipY(ImageFrame<TPixel> source, Configuration configuration)
+        {
+            ParallelHelper.IterateRows(
+                source.Bounds(),
+                configuration,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            source.GetPixelRowSpan(y).Reverse();
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
index 6c7271c5ec..3a86b3fe4f 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor.cs
@@ -1,26 +1,20 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Numerics;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ParallelUtils;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides the base methods to perform non-affine transforms on an image.
+    /// Defines a projective transformation applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ProjectiveTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class ProjectiveTransformProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ProjectiveTransformProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ProjectiveTransformProcessor"/> class.
         /// </summary>
         /// <param name="matrix">The transform matrix.</param>
         /// <param name="sampler">The sampler to perform the transform operation.</param>
@@ -39,103 +33,20 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         public IResampler Sampler { get; }
 
         /// <summary>
-        /// Gets the matrix used to supply the projective transform
+        /// Gets the matrix used to supply the projective transform.
         /// </summary>
         public Matrix4x4 TransformMatrix { get; }
 
         /// <summary>
-        /// Gets the target dimensions to constrain the transformed image to
+        /// Gets the target dimensions to constrain the transformed image to.
         /// </summary>
         public Size TargetDimensions { get; }
 
-        /// <inheritdoc/>
-        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions.Width, this.TargetDimensions.Height, x.Metadata.DeepClone()));
-
-            // Use the overload to prevent an extra frame being added
-            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // Handle tranforms that result in output identical to the original.
-            if (this.TransformMatrix.Equals(default) || this.TransformMatrix.Equals(Matrix4x4.Identity))
-            {
-                // The clone will be blank here copy all the pixel data over
-                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
-                return;
-            }
-
-            int width = this.TargetDimensions.Width;
-            var targetBounds = new Rectangle(Point.Empty, this.TargetDimensions);
-
-            // Convert from screen to world space.
-            Matrix4x4.Invert(this.TransformMatrix, out Matrix4x4 matrix);
-
-            if (this.Sampler is NearestNeighborResampler)
-            {
-                ParallelHelper.IterateRows(
-                    targetBounds,
-                    configuration,
-                    rows =>
-                        {
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                Span<TPixel> destRow = destination.GetPixelRowSpan(y);
-
-                                for (int x = 0; x < width; x++)
-                                {
-                                    Vector2 point = TransformUtils.ProjectiveTransform2D(x, y, matrix);
-                                    int px = (int)MathF.Round(point.X);
-                                    int py = (int)MathF.Round(point.Y);
-
-                                    if (sourceRectangle.Contains(px, py))
-                                    {
-                                        destRow[x] = source[px, py];
-                                    }
-                                }
-                            }
-                        });
-
-                return;
-            }
-
-            var kernel = new TransformKernelMap(configuration, source.Size(), destination.Size(), this.Sampler);
-            try
-            {
-                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
-                    targetBounds,
-                    configuration,
-                    (rows, vectorBuffer) =>
-                    {
-                        Span<Vector4> vectorSpan = vectorBuffer.Span;
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
-                            PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan, vectorSpan);
-                            ref float ySpanRef = ref kernel.GetYStartReference(y);
-                            ref float xSpanRef = ref kernel.GetXStartReference(y);
-
-                            for (int x = 0; x < width; x++)
-                            {
-                                // Use the single precision position to calculate correct bounding pixels
-                                // otherwise we get rogue pixels outside of the bounds.
-                                Vector2 point = TransformUtils.ProjectiveTransform2D(x, y, matrix);
-                                kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
-                            }
-
-                            PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
-                        }
-                    });
-            }
-            finally
-            {
-                kernel.Dispose();
-            }
+            return new ProjectiveTransformProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
new file mode 100644
index 0000000000..e6d885803b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
@@ -0,0 +1,126 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides the base methods to perform non-affine transforms on an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class ProjectiveTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly ProjectiveTransformProcessor definition;
+
+        public ProjectiveTransformProcessor(ProjectiveTransformProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        private Size TargetDimensions => this.definition.TargetDimensions;
+
+        /// <inheritdoc/>
+        protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            // We will always be creating the clone even for mutate because we may need to resize the canvas
+            IEnumerable<ImageFrame<TPixel>> frames =
+                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions.Width, this.TargetDimensions.Height, x.Metadata.DeepClone()));
+
+            // Use the overload to prevent an extra frame being added
+            return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        {
+            Matrix4x4 transformMatrix = this.definition.TransformMatrix;
+
+            // Handle tranforms that result in output identical to the original.
+            if (transformMatrix.Equals(default) || transformMatrix.Equals(Matrix4x4.Identity))
+            {
+                // The clone will be blank here copy all the pixel data over
+                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
+                return;
+            }
+
+            int width = this.TargetDimensions.Width;
+            var targetBounds = new Rectangle(Point.Empty, this.TargetDimensions);
+
+            // Convert from screen to world space.
+            Matrix4x4.Invert(transformMatrix, out Matrix4x4 matrix);
+
+            IResampler sampler = this.definition.Sampler;
+
+            if (sampler is NearestNeighborResampler)
+            {
+                ParallelHelper.IterateRows(
+                    targetBounds,
+                    configuration,
+                    rows =>
+                        {
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> destRow = destination.GetPixelRowSpan(y);
+
+                                for (int x = 0; x < width; x++)
+                                {
+                                    Vector2 point = TransformUtils.ProjectiveTransform2D(x, y, matrix);
+                                    int px = (int)MathF.Round(point.X);
+                                    int py = (int)MathF.Round(point.Y);
+
+                                    if (sourceRectangle.Contains(px, py))
+                                    {
+                                        destRow[x] = source[px, py];
+                                    }
+                                }
+                            }
+                        });
+
+                return;
+            }
+
+            var kernel = new TransformKernelMap(configuration, source.Size(), destination.Size(), sampler);
+            try
+            {
+                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(
+                    targetBounds,
+                    configuration,
+                    (rows, vectorBuffer) =>
+                        {
+                            Span<Vector4> vectorSpan = vectorBuffer.Span;
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> targetRowSpan = destination.GetPixelRowSpan(y);
+                                PixelOperations<TPixel>.Instance.ToVector4(configuration, targetRowSpan, vectorSpan);
+                                ref float ySpanRef = ref kernel.GetYStartReference(y);
+                                ref float xSpanRef = ref kernel.GetXStartReference(y);
+
+                                for (int x = 0; x < width; x++)
+                                {
+                                    // Use the single precision position to calculate correct bounding pixels
+                                    // otherwise we get rogue pixels outside of the bounds.
+                                    Vector2 point = TransformUtils.ProjectiveTransform2D(x, y, matrix);
+                                    kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
+                                }
+
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
+                            }
+                        });
+            }
+            finally
+            {
+                kernel.Dispose();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
index 57902a5e6d..ef0671d20d 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
@@ -1,26 +1,19 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.Numerics;
 
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Metadata.Profiles.Exif;
-using SixLabors.ImageSharp.ParallelUtils;
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods that allow the rotating of images.
+    /// Defines a rotation applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class RotateProcessor<TPixel> : AffineTransformProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class RotateProcessor : AffineTransformProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="RotateProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="RotateProcessor"/> class.
         /// </summary>
         /// <param name="degrees">The angle of rotation in degrees.</param>
         /// <param name="sourceSize">The source image size</param>
@@ -30,16 +23,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="RotateProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="RotateProcessor"/> class.
         /// </summary>
         /// <param name="degrees">The angle of rotation in degrees.</param>
         /// <param name="sampler">The sampler to perform the rotating operation.</param>
         /// <param name="sourceSize">The source image size</param>
         public RotateProcessor(float degrees, IResampler sampler, Size sourceSize)
             : this(
-                 TransformUtils.CreateRotationMatrixDegrees(degrees, sourceSize),
-                 sampler,
-                 sourceSize)
+                TransformUtils.CreateRotationMatrixDegrees(degrees, sourceSize),
+                sampler,
+                sourceSize)
             => this.Degrees = degrees;
 
         // Helper constructor
@@ -53,190 +46,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         public float Degrees { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            if (this.OptimizedApply(source, destination, configuration))
-            {
-                return;
-            }
-
-            base.OnFrameApply(source, destination, sourceRectangle, configuration);
-        }
-
-        /// <inheritdoc/>
-        protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
-        {
-            ExifProfile profile = destination.Metadata.ExifProfile;
-            if (profile is null)
-            {
-                return;
-            }
-
-            if (MathF.Abs(WrapDegrees(this.Degrees)) < Constants.Epsilon)
-            {
-                // No need to do anything so return.
-                return;
-            }
-
-            profile.RemoveValue(ExifTag.Orientation);
-
-            base.AfterImageApply(source, destination, sourceRectangle);
-        }
-
-        /// <summary>
-        /// Wraps a given angle in degrees so that it falls withing the 0-360 degree range
-        /// </summary>
-        /// <param name="degrees">The angle of rotation in degrees.</param>
-        /// <returns>The <see cref="float"/></returns>
-        private static float WrapDegrees(float degrees)
-        {
-            degrees %= 360;
-
-            while (degrees < 0)
-            {
-                degrees += 360;
-            }
-
-            return degrees;
-        }
-
-        /// <summary>
-        /// Rotates the images with an optimized method when the angle is 90, 180 or 270 degrees.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="destination">The destination image.</param>
-        /// <param name="configuration">The configuration.</param>
-        /// <returns>
-        /// The <see cref="bool" />
-        /// </returns>
-        private bool OptimizedApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
-        {
-            // Wrap the degrees to keep within 0-360 so we can apply optimizations when possible.
-            float degrees = WrapDegrees(this.Degrees);
-
-            if (MathF.Abs(degrees) < Constants.Epsilon)
-            {
-                // The destination will be blank here so copy all the pixel data over
-                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
-                return true;
-            }
-
-            if (MathF.Abs(degrees - 90) < Constants.Epsilon)
-            {
-                this.Rotate90(source, destination, configuration);
-                return true;
-            }
-
-            if (MathF.Abs(degrees - 180) < Constants.Epsilon)
-            {
-                this.Rotate180(source, destination, configuration);
-                return true;
-            }
-
-            if (MathF.Abs(degrees - 270) < Constants.Epsilon)
-            {
-                this.Rotate270(source, destination, configuration);
-                return true;
-            }
-
-            return false;
-        }
-
-        /// <summary>
-        /// Rotates the image 270 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="destination">The destination image.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void Rotate270(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
-        {
-            int width = source.Width;
-            int height = source.Height;
-            Rectangle destinationBounds = destination.Bounds();
-
-            ParallelHelper.IterateRows(
-                source.Bounds(),
-                configuration,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
-                            for (int x = 0; x < width; x++)
-                            {
-                                int newX = height - y - 1;
-                                newX = height - newX - 1;
-                                int newY = width - x - 1;
-
-                                if (destinationBounds.Contains(newX, newY))
-                                {
-                                    destination[newX, newY] = sourceRow[x];
-                                }
-                            }
-                        }
-                    });
-        }
-
-        /// <summary>
-        /// Rotates the image 180 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="destination">The destination image.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void Rotate180(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
-        {
-            int width = source.Width;
-            int height = source.Height;
-
-            ParallelHelper.IterateRows(
-                source.Bounds(),
-                configuration,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
-                            Span<TPixel> targetRow = destination.GetPixelRowSpan(height - y - 1);
-
-                            for (int x = 0; x < width; x++)
-                            {
-                                targetRow[width - x - 1] = sourceRow[x];
-                            }
-                        }
-                    });
-        }
-
-        /// <summary>
-        /// Rotates the image 90 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="destination">The destination image.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void Rotate90(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
-        {
-            int width = source.Width;
-            int height = source.Height;
-            Rectangle destinationBounds = destination.Bounds();
-
-            ParallelHelper.IterateRows(
-                source.Bounds(),
-                configuration,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
-                            int newX = height - y - 1;
-                            for (int x = 0; x < width; x++)
-                            {
-                                if (destinationBounds.Contains(newX, x))
-                                {
-                                    destination[newX, x] = sourceRow[x];
-                                }
-                            }
-                        }
-                    });
+            return new RotateProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs
new file mode 100644
index 0000000000..aac6f65148
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs
@@ -0,0 +1,215 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Transforms
+{
+    /// <summary>
+    /// Provides methods that allow the rotating of images.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class RotateProcessor<TPixel> : AffineTransformProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        public RotateProcessor(RotateProcessor definition)
+            : base(definition)
+        {
+            this.Degrees = definition.Degrees;
+        }
+
+        private float Degrees { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        {
+            if (this.OptimizedApply(source, destination, configuration))
+            {
+                return;
+            }
+
+            base.OnFrameApply(source, destination, sourceRectangle, configuration);
+        }
+
+        /// <inheritdoc/>
+        protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        {
+            ExifProfile profile = destination.Metadata.ExifProfile;
+            if (profile is null)
+            {
+                return;
+            }
+
+            if (MathF.Abs(WrapDegrees(this.Degrees)) < Constants.Epsilon)
+            {
+                // No need to do anything so return.
+                return;
+            }
+
+            profile.RemoveValue(ExifTag.Orientation);
+
+            base.AfterImageApply(source, destination, sourceRectangle);
+        }
+
+        /// <summary>
+        /// Wraps a given angle in degrees so that it falls withing the 0-360 degree range
+        /// </summary>
+        /// <param name="degrees">The angle of rotation in degrees.</param>
+        /// <returns>The <see cref="float"/>.</returns>
+        private static float WrapDegrees(float degrees)
+        {
+            degrees %= 360;
+
+            while (degrees < 0)
+            {
+                degrees += 360;
+            }
+
+            return degrees;
+        }
+
+        /// <summary>
+        /// Rotates the images with an optimized method when the angle is 90, 180 or 270 degrees.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="destination">The destination image.</param>
+        /// <param name="configuration">The configuration.</param>
+        /// <returns>
+        /// The <see cref="bool" />
+        /// </returns>
+        private bool OptimizedApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        {
+            // Wrap the degrees to keep within 0-360 so we can apply optimizations when possible.
+            float degrees = WrapDegrees(this.Degrees);
+
+            if (MathF.Abs(degrees) < Constants.Epsilon)
+            {
+                // The destination will be blank here so copy all the pixel data over
+                source.GetPixelSpan().CopyTo(destination.GetPixelSpan());
+                return true;
+            }
+
+            if (MathF.Abs(degrees - 90) < Constants.Epsilon)
+            {
+                this.Rotate90(source, destination, configuration);
+                return true;
+            }
+
+            if (MathF.Abs(degrees - 180) < Constants.Epsilon)
+            {
+                this.Rotate180(source, destination, configuration);
+                return true;
+            }
+
+            if (MathF.Abs(degrees - 270) < Constants.Epsilon)
+            {
+                this.Rotate270(source, destination, configuration);
+                return true;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Rotates the image 270 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="destination">The destination image.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void Rotate270(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        {
+            int width = source.Width;
+            int height = source.Height;
+            Rectangle destinationBounds = destination.Bounds();
+
+            ParallelHelper.IterateRows(
+                source.Bounds(),
+                configuration,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
+                            for (int x = 0; x < width; x++)
+                            {
+                                int newX = height - y - 1;
+                                newX = height - newX - 1;
+                                int newY = width - x - 1;
+
+                                if (destinationBounds.Contains(newX, newY))
+                                {
+                                    destination[newX, newY] = sourceRow[x];
+                                }
+                            }
+                        }
+                    });
+        }
+
+        /// <summary>
+        /// Rotates the image 180 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="destination">The destination image.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void Rotate180(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        {
+            int width = source.Width;
+            int height = source.Height;
+
+            ParallelHelper.IterateRows(
+                source.Bounds(),
+                configuration,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
+                            Span<TPixel> targetRow = destination.GetPixelRowSpan(height - y - 1);
+
+                            for (int x = 0; x < width; x++)
+                            {
+                                targetRow[width - x - 1] = sourceRow[x];
+                            }
+                        }
+                    });
+        }
+
+        /// <summary>
+        /// Rotates the image 90 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="destination">The destination image.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void Rotate90(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        {
+            int width = source.Width;
+            int height = source.Height;
+            Rectangle destinationBounds = destination.Bounds();
+
+            ParallelHelper.IterateRows(
+                source.Bounds(),
+                configuration,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
+                            int newX = height - y - 1;
+                            for (int x = 0; x < width; x++)
+                            {
+                                if (destinationBounds.Contains(newX, x))
+                                {
+                                    destination[newX, x] = sourceRow[x];
+                                }
+                            }
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
index c7b1d74104..35c3717eea 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
@@ -9,14 +9,12 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 {
     /// <summary>
-    /// Provides methods that allow the skewing of images.
+    /// Defines a skew transformation applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class SkewProcessor<TPixel> : AffineTransformProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class SkewProcessor : AffineTransformProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="SkewProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SkewProcessor"/> class.
         /// </summary>
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
@@ -27,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="SkewProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SkewProcessor"/> class.
         /// </summary>
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
diff --git a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs
index 4973b90f46..286ada2e57 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs
@@ -16,6 +16,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     {
         /// <inheritdoc/>
         protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
-            => TransformProcessorHelpers.UpdateDimensionalMetData(destination);
+            => TransformProcessorHelpers.UpdateDimensionalMetadata(destination);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
index 7bb666bce5..00c1227a6c 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorHelpers.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="image">The image to update</param>
-        public static void UpdateDimensionalMetData<TPixel>(Image<TPixel> image)
+        public static void UpdateDimensionalMetadata<TPixel>(Image<TPixel> image)
             where TPixel : struct, IPixel<TPixel>
         {
             ExifProfile profile = image.Metadata.ExifProfile;
diff --git a/src/ImageSharp/Processing/RotateExtensions.cs b/src/ImageSharp/Processing/RotateExtensions.cs
index 398a634d10..cb637a1b84 100644
--- a/src/ImageSharp/Processing/RotateExtensions.cs
+++ b/src/ImageSharp/Processing/RotateExtensions.cs
@@ -1,48 +1,44 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of rotate operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of rotate operations to the <see cref="Image"/> type.
     /// </summary>
     public static class RotateExtensions
     {
         /// <summary>
         /// Rotates and flips an image by the given instructions.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to rotate.</param>
         /// <param name="rotateMode">The <see cref="RotateMode"/> to perform the rotation.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Rotate<TPixel>(this IImageProcessingContext<TPixel> source, RotateMode rotateMode)
-            where TPixel : struct, IPixel<TPixel>
-            => Rotate(source, (float)rotateMode);
+        public static IImageProcessingContext Rotate(this IImageProcessingContext source, RotateMode rotateMode) =>
+            Rotate(source, (float)rotateMode);
 
         /// <summary>
         /// Rotates an image by the given angle in degrees.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to rotate.</param>
         /// <param name="degrees">The angle in degrees to perform the rotation.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Rotate<TPixel>(this IImageProcessingContext<TPixel> source, float degrees)
-            where TPixel : struct, IPixel<TPixel>
-            => Rotate(source, degrees, KnownResamplers.Bicubic);
+        public static IImageProcessingContext Rotate(this IImageProcessingContext source, float degrees) =>
+            Rotate(source, degrees, KnownResamplers.Bicubic);
 
         /// <summary>
         /// Rotates an image by the given angle in degrees using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to rotate.</param>
         /// <param name="degrees">The angle in degrees to perform the rotation.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Rotate<TPixel>(this IImageProcessingContext<TPixel> source, float degrees, IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new RotateProcessor<TPixel>(degrees, sampler, source.GetCurrentSize()));
+        public static IImageProcessingContext Rotate(
+            this IImageProcessingContext source,
+            float degrees,
+            IResampler sampler) =>
+            source.ApplyProcessor(new RotateProcessor(degrees, sampler, source.GetCurrentSize()));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/RotateFlipExtensions.cs b/src/ImageSharp/Processing/RotateFlipExtensions.cs
index 27ddc8de96..5030c942ef 100644
--- a/src/ImageSharp/Processing/RotateFlipExtensions.cs
+++ b/src/ImageSharp/Processing/RotateFlipExtensions.cs
@@ -6,20 +6,18 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of rotate-flip operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of rotate-flip operations to the <see cref="Image"/> type.
     /// </summary>
     public static class RotateFlipExtensions
     {
         /// <summary>
         /// Rotates and flips an image by the given instructions.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to rotate, flip, or both.</param>
         /// <param name="rotateMode">The <see cref="RotateMode"/> to perform the rotation.</param>
         /// <param name="flipMode">The <see cref="FlipMode"/> to perform the flip.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> RotateFlip<TPixel>(this IImageProcessingContext<TPixel> source, RotateMode rotateMode, FlipMode flipMode)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext RotateFlip(this IImageProcessingContext source, RotateMode rotateMode, FlipMode flipMode)
             => source.Rotate(rotateMode).Flip(flipMode);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/SkewExtensions.cs b/src/ImageSharp/Processing/SkewExtensions.cs
index 07e3c6087d..7f378d2483 100644
--- a/src/ImageSharp/Processing/SkewExtensions.cs
+++ b/src/ImageSharp/Processing/SkewExtensions.cs
@@ -1,39 +1,39 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of skew operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of skew operations to the <see cref="Image"/> type.
     /// </summary>
     public static class SkewExtensions
     {
         /// <summary>
         /// Skews an image by the given angles in degrees.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to skew.</param>
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Skew<TPixel>(this IImageProcessingContext<TPixel> source, float degreesX, float degreesY)
-            where TPixel : struct, IPixel<TPixel>
-            => Skew(source, degreesX, degreesY, KnownResamplers.Bicubic);
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext
+            Skew(this IImageProcessingContext source, float degreesX, float degreesY) =>
+            Skew(source, degreesX, degreesY, KnownResamplers.Bicubic);
 
         /// <summary>
         /// Skews an image by the given angles in degrees using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to skew.</param>
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Skew<TPixel>(this IImageProcessingContext<TPixel> source, float degreesX, float degreesY, IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new SkewProcessor<TPixel>(degreesX, degreesY, sampler, source.GetCurrentSize()));
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Skew(
+            this IImageProcessingContext source,
+            float degreesX,
+            float degreesY,
+            IResampler sampler) =>
+            source.ApplyProcessor(new SkewProcessor(degreesX, degreesY, sampler, source.GetCurrentSize()));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/TransformExtensions.cs b/src/ImageSharp/Processing/TransformExtensions.cs
index db14b6baf9..35f374d013 100644
--- a/src/ImageSharp/Processing/TransformExtensions.cs
+++ b/src/ImageSharp/Processing/TransformExtensions.cs
@@ -3,60 +3,53 @@
 
 using System.Numerics;
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of composable transform operations to the <see cref="Image{TPixel}"/> type.
+    /// Adds extensions that allow the application of composable transform operations to the <see cref="Image"/> type.
     /// </summary>
     public static class TransformExtensions
     {
         /// <summary>
         /// Performs an affine transform of an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to transform.</param>
         /// <param name="builder">The affine transform builder.</param>
         /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> source,
-            AffineTransformBuilder builder)
-            where TPixel : struct, IPixel<TPixel>
-            => Transform(source, builder, KnownResamplers.Bicubic);
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext source,
+            AffineTransformBuilder builder) =>
+            Transform(source, builder, KnownResamplers.Bicubic);
 
         /// <summary>
         /// Performs an affine transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="builder">The affine transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             AffineTransformBuilder builder,
-            IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
-            => ctx.Transform(new Rectangle(Point.Empty, ctx.GetCurrentSize()), builder, sampler);
+            IResampler sampler) =>
+            ctx.Transform(new Rectangle(Point.Empty, ctx.GetCurrentSize()), builder, sampler);
 
         /// <summary>
         /// Performs an affine transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="builder">The affine transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
             AffineTransformBuilder builder,
             IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
         {
             Matrix3x2 transform = builder.BuildMatrix(sourceRectangle);
             Size targetDimensions = TransformUtils.GetTransformedSize(sourceRectangle.Size, transform);
@@ -66,69 +59,61 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Performs an affine transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="transform">The transformation matrix.</param>
         /// <param name="targetDimensions">The size of the result image.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
             Matrix3x2 transform,
             Size targetDimensions,
             IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
         {
             return ctx.ApplyProcessor(
-                new AffineTransformProcessor<TPixel>(transform, sampler, targetDimensions),
+                new AffineTransformProcessor(transform, sampler, targetDimensions),
                 sourceRectangle);
         }
 
         /// <summary>
         /// Performs a projective transform of an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to transform.</param>
         /// <param name="builder">The affine transform builder.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> source,
-            ProjectiveTransformBuilder builder)
-            where TPixel : struct, IPixel<TPixel>
-            => Transform(source, builder, KnownResamplers.Bicubic);
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext source,
+            ProjectiveTransformBuilder builder) =>
+            Transform(source, builder, KnownResamplers.Bicubic);
 
         /// <summary>
         /// Performs a projective transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="builder">The projective transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             ProjectiveTransformBuilder builder,
-            IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
-            => ctx.Transform(new Rectangle(Point.Empty, ctx.GetCurrentSize()), builder, sampler);
+            IResampler sampler) =>
+            ctx.Transform(new Rectangle(Point.Empty, ctx.GetCurrentSize()), builder, sampler);
 
         /// <summary>
         /// Performs a projective transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="builder">The projective transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
             ProjectiveTransformBuilder builder,
             IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
         {
             Matrix4x4 transform = builder.BuildMatrix(sourceRectangle);
             Size targetDimensions = TransformUtils.GetTransformedSize(sourceRectangle.Size, transform);
@@ -138,23 +123,21 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Performs a projective transform of an image using the specified sampling algorithm.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="ctx">The <see cref="IImageProcessingContext{TPixel}"/>.</param>
+        /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="transform">The transformation matrix.</param>
         /// <param name="targetDimensions">The size of the result image.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> Transform<TPixel>(
-            this IImageProcessingContext<TPixel> ctx,
+        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        public static IImageProcessingContext Transform(
+            this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
             Matrix4x4 transform,
             Size targetDimensions,
             IResampler sampler)
-            where TPixel : struct, IPixel<TPixel>
         {
             return ctx.ApplyProcessor(
-                new ProjectiveTransformProcessor<TPixel>(transform, sampler, targetDimensions),
+                new ProjectiveTransformProcessor(transform, sampler, targetDimensions),
                 sourceRectangle);
         }
     }
diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
index b07f508834..ee04d43888 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
@@ -79,7 +79,8 @@ namespace SixLabors.ImageSharp.Tests
                     .AppendTranslation(new PointF(10, 10));
 
                 // Apply a background color so we can see the translation.
-                blend.Mutate(x => x.Transform(builder).BackgroundColor(NamedColors<TPixel>.HotPink));
+                blend.Mutate(x => x.Transform(builder));
+                blend.Mutate(x => x.BackgroundColor(NamedColors<TPixel>.HotPink));
 
                 // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
                 var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/CropTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/CropTest.cs
index 6731debd36..1c3bf2e90d 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/CropTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/CropTest.cs
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void CropWidthHeightCropProcessorWithRectangleSet(int width, int height)
         {
             this.operations.Crop(width, height);
-            CropProcessor<Rgba32> processor = this.Verify<CropProcessor<Rgba32>>();
+            CropProcessor processor = this.Verify<CropProcessor>();
 
             Assert.Equal(new Rectangle(0, 0, width, height), processor.CropRectangle);
         }
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         {
             var cropRectangle = new Rectangle(x, y, width, height);
             this.operations.Crop(cropRectangle);
-            CropProcessor<Rgba32> processor = this.Verify<CropProcessor<Rgba32>>();
+            CropProcessor processor = this.Verify<CropProcessor>();
 
             Assert.Equal(cropRectangle, processor.CropRectangle);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/EntropyCropTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/EntropyCropTest.cs
index 03a8628a56..aa684acd55 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/EntropyCropTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/EntropyCropTest.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void EntropyCropThresholdFloatEntropyCropProcessorWithThreshold(float threshold)
         {
             this.operations.EntropyCrop(threshold);
-            EntropyCropProcessor<Rgba32> processor = this.Verify<EntropyCropProcessor<Rgba32>>();
+            EntropyCropProcessor processor = this.Verify<EntropyCropProcessor>();
 
             Assert.Equal(threshold, processor.Threshold);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/FlipTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/FlipTests.cs
index 39adcaa3fa..9fe2977adb 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/FlipTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/FlipTests.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void Flip_degreesFloat_RotateProcessorWithAnglesSetAndExpandTrue(FlipMode flip)
         {
             this.operations.Flip(flip);
-            FlipProcessor<Rgba32> flipProcessor = this.Verify<FlipProcessor<Rgba32>>();
+            FlipProcessor flipProcessor = this.Verify<FlipProcessor>();
 
             Assert.Equal(flip, flipProcessor.FlipMode);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
index 82d7682558..b870ddd08a 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/PadTest.cs
@@ -1,15 +1,13 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
+
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Transforms
 {
-    using SixLabors.ImageSharp.Processing;
-    using SixLabors.ImageSharp.Processing.Processors.Transforms;
-
     public class PadTest : BaseImageOperationsExtensionTest
     {
         [Fact]
@@ -20,7 +18,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
             IResampler sampler = KnownResamplers.NearestNeighbor;
 
             this.operations.Pad(width, height);
-            ResizeProcessor<Rgba32> resizeProcessor = this.Verify<ResizeProcessor<Rgba32>>();
+            ResizeProcessor resizeProcessor = this.Verify<ResizeProcessor>();
 
             Assert.Equal(width, resizeProcessor.Width);
             Assert.Equal(height, resizeProcessor.Height);
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/RotateFlipTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/RotateFlipTests.cs
index dccf7afa6a..079ff67b7a 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/RotateFlipTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/RotateFlipTests.cs
@@ -26,8 +26,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void RotateDegreesFloatRotateProcessorWithAnglesSet(RotateMode angle, FlipMode flip, float expectedAngle)
         {
             this.operations.RotateFlip(angle, flip);
-            RotateProcessor<Rgba32> rotateProcessor = this.Verify<RotateProcessor<Rgba32>>(0);
-            FlipProcessor<Rgba32> flipProcessor = this.Verify<FlipProcessor<Rgba32>>(1);
+            RotateProcessor rotateProcessor = this.Verify<RotateProcessor>(0);
+            FlipProcessor flipProcessor = this.Verify<FlipProcessor>(1);
 
             Assert.Equal(expectedAngle, rotateProcessor.Degrees);
             Assert.Equal(flip, flipProcessor.FlipMode);
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/RotateTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/RotateTests.cs
index ae312d7235..3e2b859714 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/RotateTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/RotateTests.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void RotateDegreesFloatRotateProcessorWithAnglesSet(float angle)
         {
             this.operations.Rotate(angle);
-            RotateProcessor<Rgba32> processor = this.Verify<RotateProcessor<Rgba32>>();
+            RotateProcessor processor = this.Verify<RotateProcessor>();
 
             Assert.Equal(angle, processor.Degrees);
         }
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void RotateRotateTypeRotateProcessorWithAnglesConvertedFromEnum(RotateMode angle, float expectedAngle)
         {
             this.operations.Rotate(angle); // is this api needed ???
-            RotateProcessor<Rgba32> processor = this.Verify<RotateProcessor<Rgba32>>();
+            RotateProcessor processor = this.Verify<RotateProcessor>();
 
             Assert.Equal(expectedAngle, processor.Degrees);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/SkewTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/SkewTest.cs
index 73754b9716..38033e80d0 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/SkewTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/SkewTest.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void SkewXYCreateSkewProcessorWithAnglesSet()
         {
             this.operations.Skew(10, 20);
-            SkewProcessor<Rgba32> processor = this.Verify<SkewProcessor<Rgba32>>();
+            SkewProcessor processor = this.Verify<SkewProcessor>();
 
             Assert.Equal(10, processor.DegreesX);
             Assert.Equal(20, processor.DegreesY);
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs b/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
index a62f4fc7c6..3ac9af960b 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/TransformsHelpersTest.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
                 Assert.Equal(ExifDataType.Long, profile.GetValue(ExifTag.PixelXDimension).DataType);
                 Assert.Equal(ExifDataType.Long, profile.GetValue(ExifTag.PixelYDimension).DataType);
 
-                TransformProcessorHelpers.UpdateDimensionalMetData(img);
+                TransformProcessorHelpers.UpdateDimensionalMetadata(img);
 
                 Assert.Equal(ExifDataType.Short, profile.GetValue(ExifTag.PixelXDimension).DataType);
                 Assert.Equal(ExifDataType.Short, profile.GetValue(ExifTag.PixelYDimension).DataType);

From 22892a5cca31befa5796ed2297d22e2c34dc6aac Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 02:36:41 +0200
Subject: [PATCH 131/223] sealed everything

---
 .../Processing/Processors/Convolution/BoxBlurProcessor.cs     | 2 +-
 ...lution2DProcessor.cs => Convolution2DProcessor{TPixel}.cs} | 3 ++-
 ...2PassProcessor.cs => Convolution2PassProcessor{TPixel}.cs} | 0
 ...onvolutionProcessor.cs => ConvolutionProcessor{TPixel}.cs} | 0
 ...ector2DProcessor.cs => EdgeDetector2DProcessor{TPixel}.cs} | 0
 ...ssProcessor.cs => EdgeDetectorCompassProcessor{TPixel}.cs} | 0
 .../Processors/Convolution/GaussianBlurProcessor.cs           | 2 +-
 .../Processors/Convolution/GaussianSharpenProcessor.cs        | 2 +-
 .../Processing/Processors/Convolution/KayyaliProcessor.cs     | 2 +-
 .../Processing/Processors/Convolution/KirschProcessor.cs      | 2 +-
 .../Processors/Convolution/Laplacian3x3Processor.cs           | 2 +-
 .../Processors/Convolution/Laplacian5x5Processor.cs           | 2 +-
 .../Processors/Convolution/LaplacianOfGaussianProcessor.cs    | 2 +-
 .../Processing/Processors/Convolution/PrewittProcessor.cs     | 2 +-
 .../Processors/Convolution/RobertsCrossProcessor.cs           | 2 +-
 .../Processing/Processors/Convolution/RobinsonProcessor.cs    | 2 +-
 .../Processing/Processors/Convolution/ScharrProcessor.cs      | 2 +-
 .../Processing/Processors/Convolution/SobelProcessor.cs       | 2 +-
 .../Processing/Processors/Effects/OilPaintingProcessor.cs     | 2 +-
 .../Processing/Processors/Effects/PixelateProcessor.cs        | 2 +-
 .../Processing/Processors/Filters/AchromatomalyProcessor.cs   | 4 +---
 .../Processing/Processors/Filters/AchromatopsiaProcessor.cs   | 4 +---
 .../Processing/Processors/Filters/BlackWhiteProcessor.cs      | 4 +---
 .../Processing/Processors/Filters/BrightnessProcessor.cs      | 4 +---
 .../Processing/Processors/Filters/ContrastProcessor.cs        | 4 +---
 .../Processing/Processors/Filters/DeuteranomalyProcessor.cs   | 4 +---
 .../Processing/Processors/Filters/DeuteranopiaProcessor.cs    | 4 +---
 .../Processing/Processors/Filters/GrayscaleBt601Processor.cs  | 4 +---
 .../Processing/Processors/Filters/GrayscaleBt709Processor.cs  | 2 +-
 src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs  | 4 +---
 .../Processing/Processors/Filters/InvertProcessor.cs          | 4 +---
 .../Processing/Processors/Filters/KodachromeProcessor.cs      | 2 +-
 .../Processing/Processors/Filters/LomographProcessor.cs       | 2 +-
 .../Processing/Processors/Filters/OpacityProcessor.cs         | 2 +-
 .../Processing/Processors/Filters/PolaroidProcessor.cs        | 2 +-
 .../Processing/Processors/Filters/ProtanomalyProcessor.cs     | 4 +---
 .../Processing/Processors/Filters/ProtanopiaProcessor.cs      | 4 +---
 .../Processing/Processors/Filters/SaturateProcessor.cs        | 4 +---
 .../Processing/Processors/Filters/SepiaProcessor.cs           | 4 +---
 .../Processing/Processors/Filters/TritanomalyProcessor.cs     | 4 +---
 .../Processing/Processors/Filters/TritanopiaProcessor.cs      | 4 +---
 .../Processing/Processors/Transforms/FlipProcessor.cs         | 2 +-
 .../Processing/Processors/Transforms/SkewProcessor.cs         | 2 +-
 43 files changed, 40 insertions(+), 71 deletions(-)
 rename src/ImageSharp/Processing/Processors/Convolution/{Convolution2DProcessor.cs => Convolution2DProcessor{TPixel}.cs} (99%)
 rename src/ImageSharp/Processing/Processors/Convolution/{Convolution2PassProcessor.cs => Convolution2PassProcessor{TPixel}.cs} (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{ConvolutionProcessor.cs => ConvolutionProcessor{TPixel}.cs} (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{EdgeDetector2DProcessor.cs => EdgeDetector2DProcessor{TPixel}.cs} (100%)
 rename src/ImageSharp/Processing/Processors/Convolution/{EdgeDetectorCompassProcessor.cs => EdgeDetectorCompassProcessor{TPixel}.cs} (100%)

diff --git a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
index bb37489e13..4e56e75d39 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/BoxBlurProcessor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// <summary>
     /// Defines a box blur processor of a given Radius.
     /// </summary>
-    public class BoxBlurProcessor : IImageProcessor
+    public sealed class BoxBlurProcessor : IImageProcessor
     {
         /// <summary>
         /// The default radius used by the parameterless constructor.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor{TPixel}.cs
similarity index 99%
rename from src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor{TPixel}.cs
index 633b50a9b7..299b1d41c1 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Convolution2DProcessor{TPixel}.cs
@@ -1,9 +1,10 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Numerics;
 using System.Runtime.InteropServices;
+
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor{TPixel}.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor.cs
rename to src/ImageSharp/Processing/Processors/Convolution/Convolution2PassProcessor{TPixel}.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor{TPixel}.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor.cs
rename to src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessor{TPixel}.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor.cs
rename to src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs
similarity index 100%
rename from src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor.cs
rename to src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
index c64a024f9f..764f4ca517 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianBlurProcessor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// <summary>
     /// Defines Gaussian blur by a (Sigma, Radius) pair.
     /// </summary>
-    public class GaussianBlurProcessor : IImageProcessor
+    public sealed class GaussianBlurProcessor : IImageProcessor
     {
         /// <summary>
         /// The default value for <see cref="Sigma"/>.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
index 84e56869d3..23282af36d 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/GaussianSharpenProcessor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// <summary>
     /// Defines Gaussian sharpening by a (Sigma, Radius) pair.
     /// </summary>
-    public class GaussianSharpenProcessor : IImageProcessor
+    public sealed class GaussianSharpenProcessor : IImageProcessor
     {
          /// <summary>
         /// The default value for <see cref="Sigma"/>.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
index 99dfb17ffb..2d0f056b61 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/KayyaliProcessor.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection processing using the Kayyali operator filter.
     /// See <see href="http://edgedetection.webs.com/"/>.
     /// </summary>
-    public class KayyaliProcessor : EdgeDetectorProcessor
+    public sealed class KayyaliProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="KayyaliProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
index fc73903c7d..9e95344222 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/KirschProcessor.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection using the Kirsch operator filter.
     /// See <see href="http://en.wikipedia.org/wiki/Kirsch_operator"/>.
     /// </summary>
-    public class KirschProcessor : EdgeDetectorProcessor
+    public sealed class KirschProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="KirschProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs b/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
index 18a53cb131..9c9488fec0 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Laplacian3x3Processor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Applies edge detection processing to the image using the Laplacian 3x3 operator filter.
     /// <see href="http://en.wikipedia.org/wiki/Discrete_Laplace_operator"/>
     /// </summary>
-    public class Laplacian3x3Processor : EdgeDetectorProcessor
+    public sealed class Laplacian3x3Processor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="Laplacian3x3Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs b/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
index 1c95ca4903..fa0c8c5aa3 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/Laplacian5x5Processor.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection processing using the Laplacian 5x5 operator filter.
     /// <see href="http://en.wikipedia.org/wiki/Discrete_Laplace_operator"/>.
     /// </summary>
-    public class Laplacian5x5Processor : EdgeDetectorProcessor
+    public sealed class Laplacian5x5Processor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="Laplacian5x5Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
index d904d69b1b..2caff8201c 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/LaplacianOfGaussianProcessor.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Applies edge detection processing to the image using the Laplacian of Gaussian operator filter.
     /// See <see href="http://fourier.eng.hmc.edu/e161/lectures/gradient/node8.html"/>.
     /// </summary>
-    public class LaplacianOfGaussianProcessor : EdgeDetectorProcessor
+    public sealed class LaplacianOfGaussianProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="LaplacianOfGaussianProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
index 939b1e0c52..29f6fc279c 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/PrewittProcessor.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection using the Prewitt operator filter.
     /// See <see href="http://en.wikipedia.org/wiki/Prewitt_operator"/>.
     /// </summary>
-    public class PrewittProcessor : EdgeDetectorProcessor
+    public sealed class PrewittProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="PrewittProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
index ff41b6c694..a9db37a076 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/RobertsCrossProcessor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection processing using the Roberts Cross operator filter.
     /// See <see href="http://en.wikipedia.org/wiki/Roberts_cross"/>.
     /// </summary>
-    public class RobertsCrossProcessor : EdgeDetectorProcessor
+    public sealed class RobertsCrossProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="RobertsCrossProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
index 603a81f676..fd73789027 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/RobinsonProcessor.cs
@@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection using the Robinson operator filter.
     /// See <see href="http://www.tutorialspoint.com/dip/Robinson_Compass_Mask.htm"/>.
     /// </summary>
-    internal class RobinsonProcessor : EdgeDetectorProcessor
+    public sealed class RobinsonProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="RobinsonProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
index d23ba53384..ec0183dc63 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/ScharrProcessor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection processing using the Scharr operator filter.
     /// <see href="http://en.wikipedia.org/wiki/Sobel_operator#Alternative_operators"/>
     /// </summary>
-    public class ScharrProcessor : EdgeDetectorProcessor
+    public sealed class ScharrProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ScharrProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
index 157bb62e50..bc4339e052 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
@@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
     /// Defines edge detection using the Sobel operator filter.
     /// See <see href="http://en.wikipedia.org/wiki/Sobel_operator"/>.
     /// </summary>
-    public class SobelProcessor : EdgeDetectorProcessor
+    public sealed class SobelProcessor : EdgeDetectorProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SobelProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
index 14e164fb77..741ba9eced 100644
--- a/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Effects/OilPaintingProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Effects
     /// <summary>
     /// Defines an oil painting effect.
     /// </summary>
-    public class OilPaintingProcessor : IImageProcessor
+    public sealed class OilPaintingProcessor : IImageProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="OilPaintingProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
index eeb2aafcb5..1599c9dab8 100644
--- a/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Effects/PixelateProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Effects
     /// <summary>
     /// Defines a pixelation effect of a given size.
     /// </summary>
-    public class PixelateProcessor : IImageProcessor
+    public sealed class PixelateProcessor : IImageProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="PixelateProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
index 7c3789c388..0e6653d99b 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatomalyProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Achromatomaly (Color desensitivity) color blindness.
     /// </summary>
-    public class AchromatomalyProcessor : FilterProcessor
+    public sealed class AchromatomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="AchromatomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
index ab04a30ba1..10a201b1d7 100644
--- a/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/AchromatopsiaProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Achromatopsia (Monochrome) color blindness.
     /// </summary>
-    public class AchromatopsiaProcessor : FilterProcessor
+    public sealed class AchromatopsiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="AchromatopsiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
index 7e2e7f2f47..425ae511f6 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BlackWhiteProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a black and white filter matrix to the image.
     /// </summary>
-    public class BlackWhiteProcessor : FilterProcessor
+    public sealed class BlackWhiteProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="BlackWhiteProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
index 94a7a394a6..77862b3e3f 100644
--- a/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/BrightnessProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a brightness filter matrix using the given amount.
     /// </summary>
-    public class BrightnessProcessor : FilterProcessor
+    public sealed class BrightnessProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="BrightnessProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
index 1f74a1d642..3fdeafde3e 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ContrastProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a contrast filter matrix using the given amount.
     /// </summary>
-    public class ContrastProcessor : FilterProcessor
+    public sealed class ContrastProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ContrastProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
index 7ad0630aac..7e1c0ca503 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranomalyProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Deuteranomaly (Green-Weak) color blindness.
     /// </summary>
-    public class DeuteranomalyProcessor : FilterProcessor
+    public sealed class DeuteranomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="DeuteranomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
index 188d02dc8b..e4ed44e74e 100644
--- a/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/DeuteranopiaProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Deuteranopia (Green-Blind) color blindness.
     /// </summary>
-    public class DeuteranopiaProcessor : FilterProcessor
+    public sealed class DeuteranopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="DeuteranopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
index c24992b441..153a1a17c5 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt601Processor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.601
     /// </summary>
-    public class GrayscaleBt601Processor : FilterProcessor
+    public sealed class GrayscaleBt601Processor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GrayscaleBt601Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
index dc5294ccf0..2d7d2a1eaa 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a grayscale filter matrix using the given amount and the formula as specified by ITU-R Recommendation BT.709
     /// </summary>
-    public class GrayscaleBt709Processor : FilterProcessor
+    public sealed class GrayscaleBt709Processor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GrayscaleBt709Processor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
index 65f7eef330..05d3cbdc7c 100644
--- a/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/HueProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a hue filter matrix using the given angle of rotation in degrees
     /// </summary>
-    public class HueProcessor : FilterProcessor
+    public sealed class HueProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="HueProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
index cc41e65721..99b138033d 100644
--- a/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/InvertProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a filter matrix that inverts the colors of an image
     /// </summary>
-    public class InvertProcessor : FilterProcessor
+    public sealed class InvertProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="InvertProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
index a5215a434c..012b10ee03 100644
--- a/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/KodachromeProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies a filter matrix recreating an old Kodachrome camera effect matrix to the image
     /// </summary>
-    public class KodachromeProcessor : FilterProcessor
+    public sealed class KodachromeProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="KodachromeProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
index dae168e2cb..f5a1befffb 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor.cs
@@ -6,7 +6,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Lomograph effect.
     /// </summary>
-    public class LomographProcessor : FilterProcessor
+    public sealed class LomographProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="LomographProcessor" /> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
index 0ee5dd59e5..922ca32330 100644
--- a/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/OpacityProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Applies an opacity filter matrix using the given amount.
     /// </summary>
-    public class OpacityProcessor : FilterProcessor
+    public sealed class OpacityProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="OpacityProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
index 341c02acfc..676bbc06bb 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor.cs
@@ -6,7 +6,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     /// <summary>
     /// Converts the colors of the image recreating an old Polaroid effect.
     /// </summary>
-    public class PolaroidProcessor : FilterProcessor
+    public sealed class PolaroidProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="PolaroidProcessor" /> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
index 755bc0f81a..1c01b608e5 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanomalyProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Protanomaly (Red-Weak) color blindness.
     /// </summary>
-    public class ProtanomalyProcessor : FilterProcessor
+    public sealed class ProtanomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ProtanomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
index c4f4a76611..ec423bd9a5 100644
--- a/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/ProtanopiaProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Protanopia (Red-Blind) color blindness.
     /// </summary>
-    public class ProtanopiaProcessor : FilterProcessor
+    public sealed class ProtanopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ProtanopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
index 770fb98277..2cc40664b4 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SaturateProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a saturation filter matrix using the given amount.
     /// </summary>
-    public class SaturateProcessor : FilterProcessor
+    public sealed class SaturateProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SaturateProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
index 9da48993a2..34af410671 100644
--- a/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/SepiaProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Applies a sepia filter matrix using the given amount.
     /// </summary>
-    public class SepiaProcessor : FilterProcessor
+    public sealed class SepiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SepiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
index c64475b994..a31e52c7e7 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanomalyProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Tritanomaly (Blue-Weak) color blindness.
     /// </summary>
-    public class TritanomalyProcessor : FilterProcessor
+    public sealed class TritanomalyProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="TritanomalyProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
index 722840e743..b622126f32 100644
--- a/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/TritanopiaProcessor.cs
@@ -1,14 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Filters
 {
     /// <summary>
     /// Converts the colors of the image recreating Tritanopia (Blue-Blind) color blindness.
     /// </summary>
-    public class TritanopiaProcessor : FilterProcessor
+    public sealed class TritanopiaProcessor : FilterProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="TritanopiaProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
index 9a3eab6cc8..f604d8399f 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/FlipProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// <summary>
     /// Defines a flipping around the center point of the image.
     /// </summary>
-    public class FlipProcessor : IImageProcessor
+    public sealed class FlipProcessor : IImageProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="FlipProcessor"/> class.
diff --git a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
index 35c3717eea..cb73bb66c2 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// <summary>
     /// Defines a skew transformation applicable to an <see cref="Image"/>.
     /// </summary>
-    internal class SkewProcessor : AffineTransformProcessor
+    public sealed class SkewProcessor : AffineTransformProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SkewProcessor"/> class.

From 394174bb532ad4f61b35b81cbfa38b9131535158 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 15:56:34 +0200
Subject: [PATCH 132/223] refactor HistogramEqualization

---
 .../HistogramEqualizationExtension.cs         |  44 +-
 .../AdaptiveHistEqualizationProcessor.cs      | 526 +----------------
 ...aptiveHistEqualizationProcessor{TPixel}.cs | 546 ++++++++++++++++++
 .../AdaptiveHistEqualizationSWProcessor.cs    | 371 +-----------
 ...tiveHistEqualizationSWProcessor{TPixel}.cs | 390 +++++++++++++
 .../GlobalHistogramEqualizationProcessor.cs   |  99 +---
 ...lHistogramEqualizationProcessor{TPixel}.cs | 107 ++++
 .../HistogramEqualizationOptions.cs           |   2 +-
 .../HistogramEqualizationProcessor.cs         | 134 ++---
 .../HistogramEqualizationProcessor{TPixel}.cs | 139 +++++
 .../HistogramEqualizationTests.cs             |   4 +-
 .../Processors/Dithering/DitherTests.cs       |   3 +-
 12 files changed, 1264 insertions(+), 1101 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
index d967ef3622..aae3e997fe 100644
--- a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
+++ b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Normalization;
 
 namespace SixLabors.ImageSharp.Processing
@@ -14,49 +13,20 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Equalizes the histogram of an image to increases the contrast.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> HistogramEqualization<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => HistogramEqualization(source, HistogramEqualizationOptions.Default);
+        public static IImageProcessingContext HistogramEqualization(this IImageProcessingContext source) =>
+            HistogramEqualization(source, HistogramEqualizationOptions.Default);
 
         /// <summary>
         /// Equalizes the histogram of an image to increases the contrast.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The histogram equalization options to use.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> HistogramEqualization<TPixel>(this IImageProcessingContext<TPixel> source, HistogramEqualizationOptions options)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(GetProcessor<TPixel>(options));
-
-        private static HistogramEqualizationProcessor<TPixel> GetProcessor<TPixel>(HistogramEqualizationOptions options)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            HistogramEqualizationProcessor<TPixel> processor;
-
-            switch (options.Method)
-            {
-                case HistogramEqualizationMethod.Global:
-                    processor = new GlobalHistogramEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage);
-                    break;
-
-                case HistogramEqualizationMethod.AdaptiveTileInterpolation:
-                    processor = new AdaptiveHistEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage, options.Tiles);
-                    break;
-
-                case HistogramEqualizationMethod.AdaptiveSlidingWindow:
-                    processor = new AdaptiveHistEqualizationSWProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage, options.Tiles);
-                    break;
-
-                default:
-                    processor = new GlobalHistogramEqualizationProcessor<TPixel>(options.LuminanceLevels, options.ClipHistogram, options.ClipLimitPercentage);
-                    break;
-            }
-
-            return processor;
-        }
+        public static IImageProcessingContext HistogramEqualization(
+            this IImageProcessingContext source,
+            HistogramEqualizationOptions options) =>
+            source.ApplyProcessor(HistogramEqualizationProcessor.FromOptions(options));
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
index cb52a88b7b..4fd0f853d0 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
@@ -1,545 +1,37 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Collections.Generic;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Normalization
 {
     /// <summary>
     /// Applies an adaptive histogram equalization to the image. The image is split up in tiles. For each tile a cumulative distribution function (cdf) is calculated.
     /// To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AdaptiveHistEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class AdaptiveHistEqualizationProcessor : HistogramEqualizationProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
-        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+        /// <param name="numberOfTiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int numberOfTiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
-            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
-            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
-
-            this.Tiles = tiles;
+            this.NumberOfTiles = numberOfTiles;
         }
 
         /// <summary>
         /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
         /// </summary>
-        private int Tiles { get; }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            int sourceWidth = source.Width;
-            int sourceHeight = source.Height;
-            int numberOfPixels = sourceWidth * sourceHeight;
-            int tileWidth = (int)MathF.Ceiling(sourceWidth / (float)this.Tiles);
-            int tileHeight = (int)MathF.Ceiling(sourceHeight / (float)this.Tiles);
-            int pixelsInTile = tileWidth * tileHeight;
-            int halfTileWidth = tileWidth / 2;
-            int halfTileHeight = tileHeight / 2;
-            int luminanceLevels = this.LuminanceLevels;
-
-            // The image is split up into tiles. For each tile the cumulative distribution function will be calculated.
-            using (var cdfData = new CdfTileData(configuration, sourceWidth, sourceHeight, this.Tiles, this.Tiles, tileWidth, tileHeight, luminanceLevels))
-            {
-                cdfData.CalculateLookupTables(source, this);
-
-                var tileYStartPositions = new List<(int y, int cdfY)>();
-                int cdfY = 0;
-                for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
-                {
-                    tileYStartPositions.Add((y, cdfY));
-                    cdfY++;
-                }
-
-                Parallel.For(
-                    0,
-                    tileYStartPositions.Count,
-                    new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism },
-                    index =>
-                {
-                    int cdfX = 0;
-                    int tileX = 0;
-                    int tileY = 0;
-                    int y = tileYStartPositions[index].y;
-                    int cdfYY = tileYStartPositions[index].cdfY;
-
-                    // It's unfortunate that we have to do this per iteration.
-                    ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
-
-                    cdfX = 0;
-                    for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
-                    {
-                        tileY = 0;
-                        int yEnd = Math.Min(y + tileHeight, sourceHeight);
-                        int xEnd = Math.Min(x + tileWidth, sourceWidth);
-                        for (int dy = y; dy < yEnd; dy++)
-                        {
-                            int dyOffSet = dy * sourceWidth;
-                            tileX = 0;
-                            for (int dx = x; dx < xEnd; dx++)
-                            {
-                                ref TPixel pixel = ref Unsafe.Add(ref sourceBase, dyOffSet + dx);
-                                float luminanceEqualized = InterpolateBetweenFourTiles(
-                                    pixel,
-                                    cdfData,
-                                    this.Tiles,
-                                    this.Tiles,
-                                    tileX,
-                                    tileY,
-                                    cdfX,
-                                    cdfYY,
-                                    tileWidth,
-                                    tileHeight,
-                                    luminanceLevels);
-
-                                pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
-                                tileX++;
-                            }
-
-                            tileY++;
-                        }
-
-                        cdfX++;
-                    }
-                });
-
-                ref TPixel pixelsBase = ref source.GetPixelReference(0, 0);
-
-                // Fix left column
-                ProcessBorderColumn(ref pixelsBase, cdfData, 0, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: 0, xEnd: halfTileWidth, luminanceLevels);
-
-                // Fix right column
-                int rightBorderStartX = ((this.Tiles - 1) * tileWidth) + halfTileWidth;
-                ProcessBorderColumn(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: rightBorderStartX, xEnd: sourceWidth, luminanceLevels);
-
-                // Fix top row
-                ProcessBorderRow(ref pixelsBase, cdfData, 0, sourceWidth, tileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
-
-                // Fix bottom row
-                int bottomBorderStartY = ((this.Tiles - 1) * tileHeight) + halfTileHeight;
-                ProcessBorderRow(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, tileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
-
-                // Left top corner
-                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, 0, xStart: 0, xEnd: halfTileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
-
-                // Left bottom corner
-                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, this.Tiles - 1, xStart: 0, xEnd: halfTileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
-
-                // Right top corner
-                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, 0, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
-
-                // Right bottom corner
-                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, this.Tiles - 1, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
-            }
-        }
-
-        /// <summary>
-        /// Processes the part of a corner tile which was previously left out. It consists of 1 / 4 of a tile and does not need interpolation.
-        /// </summary>
-        /// <param name="pixelsBase">The output pixels base reference.</param>
-        /// <param name="cdfData">The lookup table to remap the grey values.</param>
-        /// <param name="sourceWidth">The source image width.</param>
-        /// <param name="cdfX">The x-position in the CDF lookup map.</param>
-        /// <param name="cdfY">The y-position in the CDF lookup map.</param>
-        /// <param name="xStart">X start position.</param>
-        /// <param name="xEnd">X end position.</param>
-        /// <param name="yStart">Y start position.</param>
-        /// <param name="yEnd">Y end position.</param>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        private static void ProcessCornerTile(
-            ref TPixel pixelsBase,
-            CdfTileData cdfData,
-            int sourceWidth,
-            int cdfX,
-            int cdfY,
-            int xStart,
-            int xEnd,
-            int yStart,
-            int yEnd,
-            int luminanceLevels)
-        {
-            for (int dy = yStart; dy < yEnd; dy++)
-            {
-                int dyOffSet = dy * sourceWidth;
-                for (int dx = xStart; dx < xEnd; dx++)
-                {
-                    ref TPixel pixel = ref Unsafe.Add(ref pixelsBase, dyOffSet + dx);
-                    float luminanceEqualized = cdfData.RemapGreyValue(cdfX, cdfY, GetLuminance(pixel, luminanceLevels));
-                    pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
-                }
-            }
-        }
-
-        /// <summary>
-        /// Processes a border column of the image which is half the size of the tile width.
-        /// </summary>
-        /// <param name="pixelBase">The output pixels reference.</param>
-        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
-        /// <param name="cdfX">The X index of the lookup table to use.</param>
-        /// <param name="sourceWidth">The source image width.</param>
-        /// <param name="sourceHeight">The source image height.</param>
-        /// <param name="tileWidth">The width of a tile.</param>
-        /// <param name="tileHeight">The height of a tile.</param>
-        /// <param name="xStart">X start position in the image.</param>
-        /// <param name="xEnd">X end position of the image.</param>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        private static void ProcessBorderColumn(
-            ref TPixel pixelBase,
-            CdfTileData cdfData,
-            int cdfX,
-            int sourceWidth,
-            int sourceHeight,
-            int tileWidth,
-            int tileHeight,
-            int xStart,
-            int xEnd,
-            int luminanceLevels)
-        {
-            int halfTileWidth = tileWidth / 2;
-            int halfTileHeight = tileHeight / 2;
-
-            int cdfY = 0;
-            for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
-            {
-                int yLimit = Math.Min(y + tileHeight, sourceHeight - 1);
-                int tileY = 0;
-                for (int dy = y; dy < yLimit; dy++)
-                {
-                    int dyOffSet = dy * sourceWidth;
-                    int tileX = halfTileWidth;
-                    for (int dx = xStart; dx < xEnd; dx++)
-                    {
-                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
-                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX, cdfY + 1, tileY, tileHeight, luminanceLevels);
-                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
-                        tileX++;
-                    }
-
-                    tileY++;
-                }
-
-                cdfY++;
-            }
-        }
+        public int NumberOfTiles { get; }
 
-        /// <summary>
-        /// Processes a border row of the image which is half of the size of the tile height.
-        /// </summary>
-        /// <param name="pixelBase">The output pixels base reference.</param>
-        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
-        /// <param name="cdfY">The Y index of the lookup table to use.</param>
-        /// <param name="sourceWidth">The source image width.</param>
-        /// <param name="tileWidth">The width of a tile.</param>
-        /// <param name="yStart">Y start position in the image.</param>
-        /// <param name="yEnd">Y end position of the image.</param>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        private static void ProcessBorderRow(
-            ref TPixel pixelBase,
-            CdfTileData cdfData,
-            int cdfY,
-            int sourceWidth,
-            int tileWidth,
-            int yStart,
-            int yEnd,
-            int luminanceLevels)
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            int halfTileWidth = tileWidth / 2;
-
-            int cdfX = 0;
-            for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
-            {
-                int tileY = 0;
-                for (int dy = yStart; dy < yEnd; dy++)
-                {
-                    int dyOffSet = dy * sourceWidth;
-                    int tileX = 0;
-                    int xLimit = Math.Min(x + tileWidth, sourceWidth - 1);
-                    for (int dx = x; dx < xLimit; dx++)
-                    {
-                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
-                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX + 1, cdfY, tileX, tileWidth, luminanceLevels);
-                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
-                        tileX++;
-                    }
-
-                    tileY++;
-                }
-
-                cdfX++;
-            }
-        }
-
-        /// <summary>
-        /// Bilinear interpolation between four adjacent tiles.
-        /// </summary>
-        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
-        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
-        /// <param name="tileCountX">The number of tiles in the x-direction.</param>
-        /// <param name="tileCountY">The number of tiles in the y-direction.</param>
-        /// <param name="tileX">X position inside the tile.</param>
-        /// <param name="tileY">Y position inside the tile.</param>
-        /// <param name="cdfX">X index of the top left lookup table to use.</param>
-        /// <param name="cdfY">Y index of the top left lookup table to use.</param>
-        /// <param name="tileWidth">Width of one tile in pixels.</param>
-        /// <param name="tileHeight">Height of one tile in pixels.</param>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        /// <returns>A re-mapped grey value.</returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private static float InterpolateBetweenFourTiles(
-           TPixel sourcePixel,
-           CdfTileData cdfData,
-           int tileCountX,
-           int tileCountY,
-           int tileX,
-           int tileY,
-           int cdfX,
-           int cdfY,
-           int tileWidth,
-           int tileHeight,
-           int luminanceLevels)
-        {
-            int luminance = GetLuminance(sourcePixel, luminanceLevels);
-            float tx = tileX / (float)(tileWidth - 1);
-            float ty = tileY / (float)(tileHeight - 1);
-
-            int yTop = cdfY;
-            int yBottom = Math.Min(tileCountY - 1, yTop + 1);
-            int xLeft = cdfX;
-            int xRight = Math.Min(tileCountX - 1, xLeft + 1);
-
-            float cdfLeftTopLuminance = cdfData.RemapGreyValue(xLeft, yTop, luminance);
-            float cdfRightTopLuminance = cdfData.RemapGreyValue(xRight, yTop, luminance);
-            float cdfLeftBottomLuminance = cdfData.RemapGreyValue(xLeft, yBottom, luminance);
-            float cdfRightBottomLuminance = cdfData.RemapGreyValue(xRight, yBottom, luminance);
-            return BilinearInterpolation(tx, ty, cdfLeftTopLuminance, cdfRightTopLuminance, cdfLeftBottomLuminance, cdfRightBottomLuminance);
-        }
-
-        /// <summary>
-        /// Linear interpolation between two tiles.
-        /// </summary>
-        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
-        /// <param name="cdfData">The CDF lookup map.</param>
-        /// <param name="tileX1">X position inside the first tile.</param>
-        /// <param name="tileY1">Y position inside the first tile.</param>
-        /// <param name="tileX2">X position inside the second tile.</param>
-        /// <param name="tileY2">Y position inside the second tile.</param>
-        /// <param name="tilePos">Position inside the tile.</param>
-        /// <param name="tileWidth">Width of the tile.</param>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        /// <returns>A re-mapped grey value.</returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private static float InterpolateBetweenTwoTiles(
-            TPixel sourcePixel,
-            CdfTileData cdfData,
-            int tileX1,
-            int tileY1,
-            int tileX2,
-            int tileY2,
-            int tilePos,
-            int tileWidth,
-            int luminanceLevels)
-        {
-            int luminance = GetLuminance(sourcePixel, luminanceLevels);
-            float tx = tilePos / (float)(tileWidth - 1);
-
-            float cdfLuminance1 = cdfData.RemapGreyValue(tileX1, tileY1, luminance);
-            float cdfLuminance2 = cdfData.RemapGreyValue(tileX2, tileY2, luminance);
-            return LinearInterpolation(cdfLuminance1, cdfLuminance2, tx);
-        }
-
-        /// <summary>
-        /// Bilinear interpolation between four tiles.
-        /// </summary>
-        /// <param name="tx">The interpolation value in x direction in the range of [0, 1].</param>
-        /// <param name="ty">The interpolation value in y direction in the range of [0, 1].</param>
-        /// <param name="lt">Luminance from top left tile.</param>
-        /// <param name="rt">Luminance from right top tile.</param>
-        /// <param name="lb">Luminance from left bottom tile.</param>
-        /// <param name="rb">Luminance from right bottom tile.</param>
-        /// <returns>Interpolated Luminance.</returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private static float BilinearInterpolation(float tx, float ty, float lt, float rt, float lb, float rb)
-            => LinearInterpolation(LinearInterpolation(lt, rt, tx), LinearInterpolation(lb, rb, tx), ty);
-
-        /// <summary>
-        /// Linear interpolation between two grey values.
-        /// </summary>
-        /// <param name="left">The left value.</param>
-        /// <param name="right">The right value.</param>
-        /// <param name="t">The interpolation value between the two values in the range of [0, 1].</param>
-        /// <returns>The interpolated value.</returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private static float LinearInterpolation(float left, float right, float t)
-            => left + ((right - left) * t);
-
-        /// <summary>
-        /// Contains the results of the cumulative distribution function for all tiles.
-        /// </summary>
-        private sealed class CdfTileData : IDisposable
-        {
-            private readonly Configuration configuration;
-            private readonly MemoryAllocator memoryAllocator;
-
-            // Used for storing the minimum value for each CDF entry.
-            private readonly Buffer2D<int> cdfMinBuffer2D;
-
-            // Used for storing the LUT for each CDF entry.
-            private readonly Buffer2D<int> cdfLutBuffer2D;
-            private readonly int pixelsInTile;
-            private readonly int sourceWidth;
-            private readonly int sourceHeight;
-            private readonly int tileWidth;
-            private readonly int tileHeight;
-            private readonly int luminanceLevels;
-            private readonly List<(int y, int cdfY)> tileYStartPositions;
-
-            public CdfTileData(
-                Configuration configuration,
-                int sourceWidth,
-                int sourceHeight,
-                int tileCountX,
-                int tileCountY,
-                int tileWidth,
-                int tileHeight,
-                int luminanceLevels)
-            {
-                this.configuration = configuration;
-                this.memoryAllocator = configuration.MemoryAllocator;
-                this.luminanceLevels = luminanceLevels;
-                this.cdfMinBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX, tileCountY);
-                this.cdfLutBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX * luminanceLevels, tileCountY);
-                this.sourceWidth = sourceWidth;
-                this.sourceHeight = sourceHeight;
-                this.tileWidth = tileWidth;
-                this.tileHeight = tileHeight;
-                this.pixelsInTile = tileWidth * tileHeight;
-
-                // Calculate the start positions and rent buffers.
-                this.tileYStartPositions = new List<(int y, int cdfY)>();
-                int cdfY = 0;
-                for (int y = 0; y < sourceHeight; y += tileHeight)
-                {
-                    this.tileYStartPositions.Add((y, cdfY));
-                    cdfY++;
-                }
-            }
-
-            public void CalculateLookupTables(ImageFrame<TPixel> source, HistogramEqualizationProcessor<TPixel> processor)
-            {
-                int sourceWidth = this.sourceWidth;
-                int sourceHeight = this.sourceHeight;
-                int tileWidth = this.tileWidth;
-                int tileHeight = this.tileHeight;
-                int luminanceLevels = this.luminanceLevels;
-                MemoryAllocator memoryAllocator = this.memoryAllocator;
-
-                Parallel.For(
-                    0,
-                    this.tileYStartPositions.Count,
-                    new ParallelOptions() { MaxDegreeOfParallelism = this.configuration.MaxDegreeOfParallelism },
-                    index =>
-                {
-                    int cdfX = 0;
-                    int cdfY = this.tileYStartPositions[index].cdfY;
-                    int y = this.tileYStartPositions[index].y;
-                    int endY = Math.Min(y + tileHeight, sourceHeight);
-                    ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
-                    ref int cdfMinBase = ref MemoryMarshal.GetReference(this.cdfMinBuffer2D.GetRowSpan(cdfY));
-
-                    using (IMemoryOwner<int> histogramBuffer = this.memoryAllocator.Allocate<int>(luminanceLevels))
-                    {
-                        Span<int> histogram = histogramBuffer.GetSpan();
-                        ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
-
-                        for (int x = 0; x < sourceWidth; x += tileWidth)
-                        {
-                            histogram.Clear();
-                            ref int cdfBase = ref MemoryMarshal.GetReference(this.GetCdfLutSpan(cdfX, index));
-
-                            int xlimit = Math.Min(x + tileWidth, sourceWidth);
-                            for (int dy = y; dy < endY; dy++)
-                            {
-                                int dyOffset = dy * sourceWidth;
-                                for (int dx = x; dx < xlimit; dx++)
-                                {
-                                    int luminace = GetLuminance(Unsafe.Add(ref sourceBase, dyOffset + dx), luminanceLevels);
-                                    histogram[luminace]++;
-                                }
-                            }
-
-                            if (processor.ClipHistogramEnabled)
-                            {
-                                processor.ClipHistogram(histogram, processor.ClipLimitPercentage, this.pixelsInTile);
-                            }
-
-                            Unsafe.Add(ref cdfMinBase, cdfX) = processor.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
-
-                            cdfX++;
-                        }
-                    }
-                });
-            }
-
-            [MethodImpl(InliningOptions.ShortMethod)]
-            public Span<int> GetCdfLutSpan(int tileX, int tileY) => this.cdfLutBuffer2D.GetRowSpan(tileY).Slice(tileX * this.luminanceLevels, this.luminanceLevels);
-
-            /// <summary>
-            /// Remaps the grey value with the cdf.
-            /// </summary>
-            /// <param name="tilesX">The tiles x-position.</param>
-            /// <param name="tilesY">The tiles y-position.</param>
-            /// <param name="luminance">The original luminance.</param>
-            /// <returns>The remapped luminance.</returns>
-            [MethodImpl(InliningOptions.ShortMethod)]
-            public float RemapGreyValue(int tilesX, int tilesY, int luminance)
-            {
-                int cdfMin = this.cdfMinBuffer2D[tilesX, tilesY];
-                Span<int> cdfSpan = this.GetCdfLutSpan(tilesX, tilesY);
-                return (this.pixelsInTile - cdfMin) == 0
-                    ? cdfSpan[luminance] / this.pixelsInTile
-                    : cdfSpan[luminance] / (float)(this.pixelsInTile - cdfMin);
-            }
-
-            public void Dispose()
-            {
-                this.cdfMinBuffer2D.Dispose();
-                this.cdfLutBuffer2D.Dispose();
-            }
+            return new AdaptiveHistEqualizationProcessor<TPixel>(this.LuminanceLevels, this.ClipHistogram, this.ClipLimitPercentage, this.NumberOfTiles);
         }
     }
 }
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs
new file mode 100644
index 0000000000..930c4010fa
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs
@@ -0,0 +1,546 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies an adaptive histogram equalization to the image. The image is split up in tiles. For each tile a cumulative distribution function (cdf) is calculated.
+    /// To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AdaptiveHistEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
+            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
+
+            this.Tiles = tiles;
+        }
+
+        /// <summary>
+        /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
+        /// </summary>
+        private int Tiles { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            int sourceWidth = source.Width;
+            int sourceHeight = source.Height;
+            int numberOfPixels = sourceWidth * sourceHeight;
+            int tileWidth = (int)MathF.Ceiling(sourceWidth / (float)this.Tiles);
+            int tileHeight = (int)MathF.Ceiling(sourceHeight / (float)this.Tiles);
+            int pixelsInTile = tileWidth * tileHeight;
+            int halfTileWidth = tileWidth / 2;
+            int halfTileHeight = tileHeight / 2;
+            int luminanceLevels = this.LuminanceLevels;
+
+            // The image is split up into tiles. For each tile the cumulative distribution function will be calculated.
+            using (var cdfData = new CdfTileData(configuration, sourceWidth, sourceHeight, this.Tiles, this.Tiles, tileWidth, tileHeight, luminanceLevels))
+            {
+                cdfData.CalculateLookupTables(source, this);
+
+                var tileYStartPositions = new List<(int y, int cdfY)>();
+                int cdfY = 0;
+                for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
+                {
+                    tileYStartPositions.Add((y, cdfY));
+                    cdfY++;
+                }
+
+                Parallel.For(
+                    0,
+                    tileYStartPositions.Count,
+                    new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism },
+                    index =>
+                        {
+                            int cdfX = 0;
+                            int tileX = 0;
+                            int tileY = 0;
+                            int y = tileYStartPositions[index].y;
+                            int cdfYY = tileYStartPositions[index].cdfY;
+
+                            // It's unfortunate that we have to do this per iteration.
+                            ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
+
+                            cdfX = 0;
+                            for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
+                            {
+                                tileY = 0;
+                                int yEnd = Math.Min(y + tileHeight, sourceHeight);
+                                int xEnd = Math.Min(x + tileWidth, sourceWidth);
+                                for (int dy = y; dy < yEnd; dy++)
+                                {
+                                    int dyOffSet = dy * sourceWidth;
+                                    tileX = 0;
+                                    for (int dx = x; dx < xEnd; dx++)
+                                    {
+                                        ref TPixel pixel = ref Unsafe.Add(ref sourceBase, dyOffSet + dx);
+                                        float luminanceEqualized = InterpolateBetweenFourTiles(
+                                            pixel,
+                                            cdfData,
+                                            this.Tiles,
+                                            this.Tiles,
+                                            tileX,
+                                            tileY,
+                                            cdfX,
+                                            cdfYY,
+                                            tileWidth,
+                                            tileHeight,
+                                            luminanceLevels);
+
+                                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                                        tileX++;
+                                    }
+
+                                    tileY++;
+                                }
+
+                                cdfX++;
+                            }
+                        });
+
+                ref TPixel pixelsBase = ref source.GetPixelReference(0, 0);
+
+                // Fix left column
+                ProcessBorderColumn(ref pixelsBase, cdfData, 0, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: 0, xEnd: halfTileWidth, luminanceLevels);
+
+                // Fix right column
+                int rightBorderStartX = ((this.Tiles - 1) * tileWidth) + halfTileWidth;
+                ProcessBorderColumn(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, sourceHeight, tileWidth, tileHeight, xStart: rightBorderStartX, xEnd: sourceWidth, luminanceLevels);
+
+                // Fix top row
+                ProcessBorderRow(ref pixelsBase, cdfData, 0, sourceWidth, tileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Fix bottom row
+                int bottomBorderStartY = ((this.Tiles - 1) * tileHeight) + halfTileHeight;
+                ProcessBorderRow(ref pixelsBase, cdfData, this.Tiles - 1, sourceWidth, tileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+
+                // Left top corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, 0, xStart: 0, xEnd: halfTileWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Left bottom corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, 0, this.Tiles - 1, xStart: 0, xEnd: halfTileWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+
+                // Right top corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, 0, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: 0, yEnd: halfTileHeight, luminanceLevels);
+
+                // Right bottom corner
+                ProcessCornerTile(ref pixelsBase, cdfData, sourceWidth, this.Tiles - 1, this.Tiles - 1, xStart: rightBorderStartX, xEnd: sourceWidth, yStart: bottomBorderStartY, yEnd: sourceHeight, luminanceLevels);
+            }
+        }
+
+        /// <summary>
+        /// Processes the part of a corner tile which was previously left out. It consists of 1 / 4 of a tile and does not need interpolation.
+        /// </summary>
+        /// <param name="pixelsBase">The output pixels base reference.</param>
+        /// <param name="cdfData">The lookup table to remap the grey values.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="cdfX">The x-position in the CDF lookup map.</param>
+        /// <param name="cdfY">The y-position in the CDF lookup map.</param>
+        /// <param name="xStart">X start position.</param>
+        /// <param name="xEnd">X end position.</param>
+        /// <param name="yStart">Y start position.</param>
+        /// <param name="yEnd">Y end position.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessCornerTile(
+            ref TPixel pixelsBase,
+            CdfTileData cdfData,
+            int sourceWidth,
+            int cdfX,
+            int cdfY,
+            int xStart,
+            int xEnd,
+            int yStart,
+            int yEnd,
+            int luminanceLevels)
+        {
+            for (int dy = yStart; dy < yEnd; dy++)
+            {
+                int dyOffSet = dy * sourceWidth;
+                for (int dx = xStart; dx < xEnd; dx++)
+                {
+                    ref TPixel pixel = ref Unsafe.Add(ref pixelsBase, dyOffSet + dx);
+                    float luminanceEqualized = cdfData.RemapGreyValue(cdfX, cdfY, GetLuminance(pixel, luminanceLevels));
+                    pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                }
+            }
+        }
+
+        /// <summary>
+        /// Processes a border column of the image which is half the size of the tile width.
+        /// </summary>
+        /// <param name="pixelBase">The output pixels reference.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="cdfX">The X index of the lookup table to use.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="sourceHeight">The source image height.</param>
+        /// <param name="tileWidth">The width of a tile.</param>
+        /// <param name="tileHeight">The height of a tile.</param>
+        /// <param name="xStart">X start position in the image.</param>
+        /// <param name="xEnd">X end position of the image.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessBorderColumn(
+            ref TPixel pixelBase,
+            CdfTileData cdfData,
+            int cdfX,
+            int sourceWidth,
+            int sourceHeight,
+            int tileWidth,
+            int tileHeight,
+            int xStart,
+            int xEnd,
+            int luminanceLevels)
+        {
+            int halfTileWidth = tileWidth / 2;
+            int halfTileHeight = tileHeight / 2;
+
+            int cdfY = 0;
+            for (int y = halfTileHeight; y < sourceHeight - halfTileHeight; y += tileHeight)
+            {
+                int yLimit = Math.Min(y + tileHeight, sourceHeight - 1);
+                int tileY = 0;
+                for (int dy = y; dy < yLimit; dy++)
+                {
+                    int dyOffSet = dy * sourceWidth;
+                    int tileX = halfTileWidth;
+                    for (int dx = xStart; dx < xEnd; dx++)
+                    {
+                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
+                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX, cdfY + 1, tileY, tileHeight, luminanceLevels);
+                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                        tileX++;
+                    }
+
+                    tileY++;
+                }
+
+                cdfY++;
+            }
+        }
+
+        /// <summary>
+        /// Processes a border row of the image which is half of the size of the tile height.
+        /// </summary>
+        /// <param name="pixelBase">The output pixels base reference.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="cdfY">The Y index of the lookup table to use.</param>
+        /// <param name="sourceWidth">The source image width.</param>
+        /// <param name="tileWidth">The width of a tile.</param>
+        /// <param name="yStart">Y start position in the image.</param>
+        /// <param name="yEnd">Y end position of the image.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        private static void ProcessBorderRow(
+            ref TPixel pixelBase,
+            CdfTileData cdfData,
+            int cdfY,
+            int sourceWidth,
+            int tileWidth,
+            int yStart,
+            int yEnd,
+            int luminanceLevels)
+        {
+            int halfTileWidth = tileWidth / 2;
+
+            int cdfX = 0;
+            for (int x = halfTileWidth; x < sourceWidth - halfTileWidth; x += tileWidth)
+            {
+                int tileY = 0;
+                for (int dy = yStart; dy < yEnd; dy++)
+                {
+                    int dyOffSet = dy * sourceWidth;
+                    int tileX = 0;
+                    int xLimit = Math.Min(x + tileWidth, sourceWidth - 1);
+                    for (int dx = x; dx < xLimit; dx++)
+                    {
+                        ref TPixel pixel = ref Unsafe.Add(ref pixelBase, dyOffSet + dx);
+                        float luminanceEqualized = InterpolateBetweenTwoTiles(pixel, cdfData, cdfX, cdfY, cdfX + 1, cdfY, tileX, tileWidth, luminanceLevels);
+                        pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                        tileX++;
+                    }
+
+                    tileY++;
+                }
+
+                cdfX++;
+            }
+        }
+
+        /// <summary>
+        /// Bilinear interpolation between four adjacent tiles.
+        /// </summary>
+        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
+        /// <param name="cdfData">The pre-computed lookup tables to remap the grey values for each tiles.</param>
+        /// <param name="tileCountX">The number of tiles in the x-direction.</param>
+        /// <param name="tileCountY">The number of tiles in the y-direction.</param>
+        /// <param name="tileX">X position inside the tile.</param>
+        /// <param name="tileY">Y position inside the tile.</param>
+        /// <param name="cdfX">X index of the top left lookup table to use.</param>
+        /// <param name="cdfY">Y index of the top left lookup table to use.</param>
+        /// <param name="tileWidth">Width of one tile in pixels.</param>
+        /// <param name="tileHeight">Height of one tile in pixels.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <returns>A re-mapped grey value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float InterpolateBetweenFourTiles(
+            TPixel sourcePixel,
+            CdfTileData cdfData,
+            int tileCountX,
+            int tileCountY,
+            int tileX,
+            int tileY,
+            int cdfX,
+            int cdfY,
+            int tileWidth,
+            int tileHeight,
+            int luminanceLevels)
+        {
+            int luminance = GetLuminance(sourcePixel, luminanceLevels);
+            float tx = tileX / (float)(tileWidth - 1);
+            float ty = tileY / (float)(tileHeight - 1);
+
+            int yTop = cdfY;
+            int yBottom = Math.Min(tileCountY - 1, yTop + 1);
+            int xLeft = cdfX;
+            int xRight = Math.Min(tileCountX - 1, xLeft + 1);
+
+            float cdfLeftTopLuminance = cdfData.RemapGreyValue(xLeft, yTop, luminance);
+            float cdfRightTopLuminance = cdfData.RemapGreyValue(xRight, yTop, luminance);
+            float cdfLeftBottomLuminance = cdfData.RemapGreyValue(xLeft, yBottom, luminance);
+            float cdfRightBottomLuminance = cdfData.RemapGreyValue(xRight, yBottom, luminance);
+            return BilinearInterpolation(tx, ty, cdfLeftTopLuminance, cdfRightTopLuminance, cdfLeftBottomLuminance, cdfRightBottomLuminance);
+        }
+
+        /// <summary>
+        /// Linear interpolation between two tiles.
+        /// </summary>
+        /// <param name="sourcePixel">The pixel to remap the grey value from.</param>
+        /// <param name="cdfData">The CDF lookup map.</param>
+        /// <param name="tileX1">X position inside the first tile.</param>
+        /// <param name="tileY1">Y position inside the first tile.</param>
+        /// <param name="tileX2">X position inside the second tile.</param>
+        /// <param name="tileY2">Y position inside the second tile.</param>
+        /// <param name="tilePos">Position inside the tile.</param>
+        /// <param name="tileWidth">Width of the tile.</param>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <returns>A re-mapped grey value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float InterpolateBetweenTwoTiles(
+            TPixel sourcePixel,
+            CdfTileData cdfData,
+            int tileX1,
+            int tileY1,
+            int tileX2,
+            int tileY2,
+            int tilePos,
+            int tileWidth,
+            int luminanceLevels)
+        {
+            int luminance = GetLuminance(sourcePixel, luminanceLevels);
+            float tx = tilePos / (float)(tileWidth - 1);
+
+            float cdfLuminance1 = cdfData.RemapGreyValue(tileX1, tileY1, luminance);
+            float cdfLuminance2 = cdfData.RemapGreyValue(tileX2, tileY2, luminance);
+            return LinearInterpolation(cdfLuminance1, cdfLuminance2, tx);
+        }
+
+        /// <summary>
+        /// Bilinear interpolation between four tiles.
+        /// </summary>
+        /// <param name="tx">The interpolation value in x direction in the range of [0, 1].</param>
+        /// <param name="ty">The interpolation value in y direction in the range of [0, 1].</param>
+        /// <param name="lt">Luminance from top left tile.</param>
+        /// <param name="rt">Luminance from right top tile.</param>
+        /// <param name="lb">Luminance from left bottom tile.</param>
+        /// <param name="rb">Luminance from right bottom tile.</param>
+        /// <returns>Interpolated Luminance.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float BilinearInterpolation(float tx, float ty, float lt, float rt, float lb, float rb)
+            => LinearInterpolation(LinearInterpolation(lt, rt, tx), LinearInterpolation(lb, rb, tx), ty);
+
+        /// <summary>
+        /// Linear interpolation between two grey values.
+        /// </summary>
+        /// <param name="left">The left value.</param>
+        /// <param name="right">The right value.</param>
+        /// <param name="t">The interpolation value between the two values in the range of [0, 1].</param>
+        /// <returns>The interpolated value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private static float LinearInterpolation(float left, float right, float t)
+            => left + ((right - left) * t);
+
+        /// <summary>
+        /// Contains the results of the cumulative distribution function for all tiles.
+        /// </summary>
+        private sealed class CdfTileData : IDisposable
+        {
+            private readonly Configuration configuration;
+            private readonly MemoryAllocator memoryAllocator;
+
+            // Used for storing the minimum value for each CDF entry.
+            private readonly Buffer2D<int> cdfMinBuffer2D;
+
+            // Used for storing the LUT for each CDF entry.
+            private readonly Buffer2D<int> cdfLutBuffer2D;
+            private readonly int pixelsInTile;
+            private readonly int sourceWidth;
+            private readonly int sourceHeight;
+            private readonly int tileWidth;
+            private readonly int tileHeight;
+            private readonly int luminanceLevels;
+            private readonly List<(int y, int cdfY)> tileYStartPositions;
+
+            public CdfTileData(
+                Configuration configuration,
+                int sourceWidth,
+                int sourceHeight,
+                int tileCountX,
+                int tileCountY,
+                int tileWidth,
+                int tileHeight,
+                int luminanceLevels)
+            {
+                this.configuration = configuration;
+                this.memoryAllocator = configuration.MemoryAllocator;
+                this.luminanceLevels = luminanceLevels;
+                this.cdfMinBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX, tileCountY);
+                this.cdfLutBuffer2D = this.memoryAllocator.Allocate2D<int>(tileCountX * luminanceLevels, tileCountY);
+                this.sourceWidth = sourceWidth;
+                this.sourceHeight = sourceHeight;
+                this.tileWidth = tileWidth;
+                this.tileHeight = tileHeight;
+                this.pixelsInTile = tileWidth * tileHeight;
+
+                // Calculate the start positions and rent buffers.
+                this.tileYStartPositions = new List<(int y, int cdfY)>();
+                int cdfY = 0;
+                for (int y = 0; y < sourceHeight; y += tileHeight)
+                {
+                    this.tileYStartPositions.Add((y, cdfY));
+                    cdfY++;
+                }
+            }
+
+            public void CalculateLookupTables(ImageFrame<TPixel> source, HistogramEqualizationProcessor<TPixel> processor)
+            {
+                int sourceWidth = this.sourceWidth;
+                int sourceHeight = this.sourceHeight;
+                int tileWidth = this.tileWidth;
+                int tileHeight = this.tileHeight;
+                int luminanceLevels = this.luminanceLevels;
+                MemoryAllocator memoryAllocator = this.memoryAllocator;
+
+                Parallel.For(
+                    0,
+                    this.tileYStartPositions.Count,
+                    new ParallelOptions() { MaxDegreeOfParallelism = this.configuration.MaxDegreeOfParallelism },
+                    index =>
+                        {
+                            int cdfX = 0;
+                            int cdfY = this.tileYStartPositions[index].cdfY;
+                            int y = this.tileYStartPositions[index].y;
+                            int endY = Math.Min(y + tileHeight, sourceHeight);
+                            ref TPixel sourceBase = ref source.GetPixelReference(0, 0);
+                            ref int cdfMinBase = ref MemoryMarshal.GetReference(this.cdfMinBuffer2D.GetRowSpan(cdfY));
+
+                            using (IMemoryOwner<int> histogramBuffer = this.memoryAllocator.Allocate<int>(luminanceLevels))
+                            {
+                                Span<int> histogram = histogramBuffer.GetSpan();
+                                ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+
+                                for (int x = 0; x < sourceWidth; x += tileWidth)
+                                {
+                                    histogram.Clear();
+                                    ref int cdfBase = ref MemoryMarshal.GetReference(this.GetCdfLutSpan(cdfX, index));
+
+                                    int xlimit = Math.Min(x + tileWidth, sourceWidth);
+                                    for (int dy = y; dy < endY; dy++)
+                                    {
+                                        int dyOffset = dy * sourceWidth;
+                                        for (int dx = x; dx < xlimit; dx++)
+                                        {
+                                            int luminace = GetLuminance(Unsafe.Add(ref sourceBase, dyOffset + dx), luminanceLevels);
+                                            histogram[luminace]++;
+                                        }
+                                    }
+
+                                    if (processor.ClipHistogramEnabled)
+                                    {
+                                        processor.ClipHistogram(histogram, processor.ClipLimitPercentage, this.pixelsInTile);
+                                    }
+
+                                    Unsafe.Add(ref cdfMinBase, cdfX) = processor.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
+
+                                    cdfX++;
+                                }
+                            }
+                        });
+            }
+
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public Span<int> GetCdfLutSpan(int tileX, int tileY) => this.cdfLutBuffer2D.GetRowSpan(tileY).Slice(tileX * this.luminanceLevels, this.luminanceLevels);
+
+            /// <summary>
+            /// Remaps the grey value with the cdf.
+            /// </summary>
+            /// <param name="tilesX">The tiles x-position.</param>
+            /// <param name="tilesY">The tiles y-position.</param>
+            /// <param name="luminance">The original luminance.</param>
+            /// <returns>The remapped luminance.</returns>
+            [MethodImpl(InliningOptions.ShortMethod)]
+            public float RemapGreyValue(int tilesX, int tilesY, int luminance)
+            {
+                int cdfMin = this.cdfMinBuffer2D[tilesX, tilesY];
+                Span<int> cdfSpan = this.GetCdfLutSpan(tilesX, tilesY);
+                return (this.pixelsInTile - cdfMin) == 0
+                           ? cdfSpan[luminance] / this.pixelsInTile
+                           : cdfSpan[luminance] / (float)(this.pixelsInTile - cdfMin);
+            }
+
+            public void Dispose()
+            {
+                this.cdfMinBuffer2D.Dispose();
+                this.cdfLutBuffer2D.Dispose();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
index aa9b530c6d..cd4a9644ff 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
@@ -1,389 +1,36 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Normalization
 {
     /// <summary>
     /// Applies an adaptive histogram equalization to the image using an sliding window approach.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AdaptiveHistEqualizationSWProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class AdaptiveHistEqualizationSWProcessor : HistogramEqualizationProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
-        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+        /// <param name="numberOfTiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int numberOfTiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
-            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
-            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
-
-            this.Tiles = tiles;
+            this.NumberOfTiles = numberOfTiles;
         }
 
         /// <summary>
         /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
         /// </summary>
-        private int Tiles { get; }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
-            int numberOfPixels = source.Width * source.Height;
-            Span<TPixel> pixels = source.GetPixelSpan();
-
-            var parallelOptions = new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism };
-            int tileWidth = source.Width / this.Tiles;
-            int tileHeight = tileWidth;
-            int pixeInTile = tileWidth * tileHeight;
-            int halfTileHeight = tileHeight / 2;
-            int halfTileWidth = halfTileHeight;
-            var slidingWindowInfos = new SlidingWindowInfos(tileWidth, tileHeight, halfTileWidth, halfTileHeight, pixeInTile);
-
-            using (Buffer2D<TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Width, source.Height))
-            {
-                // Process the inner tiles, which do not require to check the borders.
-                Parallel.For(
-                    halfTileWidth,
-                    source.Width - halfTileWidth,
-                    parallelOptions,
-                    this.ProcessSlidingWindow(
-                        source,
-                        memoryAllocator,
-                        targetPixels,
-                        slidingWindowInfos,
-                        yStart: halfTileHeight,
-                        yEnd: source.Height - halfTileHeight,
-                        useFastPath: true,
-                        configuration));
-
-                // Process the left border of the image.
-                Parallel.For(
-                    0,
-                    halfTileWidth,
-                    parallelOptions,
-                    this.ProcessSlidingWindow(
-                        source,
-                        memoryAllocator,
-                        targetPixels,
-                        slidingWindowInfos,
-                        yStart: 0,
-                        yEnd: source.Height,
-                        useFastPath: false,
-                        configuration));
-
-                // Process the right border of the image.
-                Parallel.For(
-                    source.Width - halfTileWidth,
-                    source.Width,
-                    parallelOptions,
-                    this.ProcessSlidingWindow(
-                        source,
-                        memoryAllocator,
-                        targetPixels,
-                        slidingWindowInfos,
-                        yStart: 0,
-                        yEnd: source.Height,
-                        useFastPath: false,
-                        configuration));
-
-                // Process the top border of the image.
-                Parallel.For(
-                    halfTileWidth,
-                    source.Width - halfTileWidth,
-                    parallelOptions,
-                    this.ProcessSlidingWindow(
-                        source,
-                        memoryAllocator,
-                        targetPixels,
-                        slidingWindowInfos,
-                        yStart: 0,
-                        yEnd: halfTileHeight,
-                        useFastPath: false,
-                        configuration));
-
-                // Process the bottom border of the image.
-                Parallel.For(
-                    halfTileWidth,
-                    source.Width - halfTileWidth,
-                    parallelOptions,
-                    this.ProcessSlidingWindow(
-                        source,
-                        memoryAllocator,
-                        targetPixels,
-                        slidingWindowInfos,
-                        yStart: source.Height - halfTileHeight,
-                        yEnd: source.Height,
-                        useFastPath: false,
-                        configuration));
-
-                Buffer2D<TPixel>.SwapOrCopyContent(source.PixelBuffer, targetPixels);
-            }
-        }
-
-        /// <summary>
-        /// Applies the sliding window equalization to one column of the image. The window is moved from top to bottom.
-        /// Moving the window one pixel down requires to remove one row from the top of the window from the histogram and
-        /// adding a new row at the bottom.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="memoryAllocator">The memory allocator.</param>
-        /// <param name="targetPixels">The target pixels.</param>
-        /// <param name="swInfos">Informations about the sliding window dimensions.</param>
-        /// <param name="yStart">The y start position.</param>
-        /// <param name="yEnd">The y end position.</param>
-        /// <param name="useFastPath">if set to true the borders of the image will not be checked.</param>
-        /// <param name="configuration">The configuration.</param>
-        /// <returns>Action Delegate.</returns>
-        private Action<int> ProcessSlidingWindow(
-            ImageFrame<TPixel> source,
-            MemoryAllocator memoryAllocator,
-            Buffer2D<TPixel> targetPixels,
-            SlidingWindowInfos swInfos,
-            int yStart,
-            int yEnd,
-            bool useFastPath,
-            Configuration configuration)
-        {
-            return x =>
-            {
-                using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-                using (IMemoryOwner<int> histogramBufferCopy = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-                using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-                using (IMemoryOwner<Vector4> pixelRowBuffer = memoryAllocator.Allocate<Vector4>(swInfos.TileWidth, AllocationOptions.Clean))
-                {
-                    Span<int> histogram = histogramBuffer.GetSpan();
-                    ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
-
-                    Span<int> histogramCopy = histogramBufferCopy.GetSpan();
-                    ref int histogramCopyBase = ref MemoryMarshal.GetReference(histogramCopy);
-
-                    ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
-
-                    Span<Vector4> pixelRow = pixelRowBuffer.GetSpan();
-                    ref Vector4 pixelRowBase = ref MemoryMarshal.GetReference(pixelRow);
-
-                    // Build the initial histogram of grayscale values.
-                    for (int dy = yStart - swInfos.HalfTileHeight; dy < yStart + swInfos.HalfTileHeight; dy++)
-                    {
-                        if (useFastPath)
-                        {
-                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
-                        }
-                        else
-                        {
-                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
-                        }
-
-                        this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
-                    }
-
-                    for (int y = yStart; y < yEnd; y++)
-                    {
-                        if (this.ClipHistogramEnabled)
-                        {
-                            // Clipping the histogram, but doing it on a copy to keep the original un-clipped values for the next iteration.
-                            histogram.CopyTo(histogramCopy);
-                            this.ClipHistogram(histogramCopy, this.ClipLimitPercentage, swInfos.PixeInTile);
-                        }
-
-                        // Calculate the cumulative distribution function, which will map each input pixel in the current tile to a new value.
-                        int cdfMin = this.ClipHistogramEnabled
-                        ? this.CalculateCdf(ref cdfBase, ref histogramCopyBase, histogram.Length - 1)
-                        : this.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
-
-                        float numberOfPixelsMinusCdfMin = swInfos.PixeInTile - cdfMin;
-
-                        // Map the current pixel to the new equalized value.
-                        int luminance = GetLuminance(source[x, y], this.LuminanceLevels);
-                        float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
-                        targetPixels[x, y].FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, source[x, y].ToVector4().W));
-
-                        // Remove top most row from the histogram, mirroring rows which exceeds the borders.
-                        if (useFastPath)
-                        {
-                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
-                        }
-                        else
-                        {
-                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
-                        }
-
-                        this.RemovePixelsFromHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
-
-                        // Add new bottom row to the histogram, mirroring rows which exceeds the borders.
-                        if (useFastPath)
-                        {
-                            this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
-                        }
-                        else
-                        {
-                            this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
-                        }
-
-                        this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
-                    }
-                }
-            };
-        }
-
-        /// <summary>
-        /// Get the a pixel row at a given position with a length of the tile width. Mirrors pixels which exceeds the edges.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
-        /// <param name="x">The x position.</param>
-        /// <param name="y">The y position.</param>
-        /// <param name="tileWidth">The width in pixels of a tile.</param>
-        /// <param name="configuration">The configuration.</param>
-        private void CopyPixelRow(
-            ImageFrame<TPixel> source,
-            Span<Vector4> rowPixels,
-            int x,
-            int y,
-            int tileWidth,
-            Configuration configuration)
-        {
-            if (y < 0)
-            {
-                y = ImageMaths.FastAbs(y);
-            }
-            else if (y >= source.Height)
-            {
-                int diff = y - source.Height;
-                y = source.Height - diff - 1;
-            }
-
-            // Special cases for the left and the right border where GetPixelRowSpan can not be used.
-            if (x < 0)
-            {
-                rowPixels.Clear();
-                int idx = 0;
-                for (int dx = x; dx < x + tileWidth; dx++)
-                {
-                    rowPixels[idx] = source[ImageMaths.FastAbs(dx), y].ToVector4();
-                    idx++;
-                }
-
-                return;
-            }
-            else if (x + tileWidth > source.Width)
-            {
-                rowPixels.Clear();
-                int idx = 0;
-                for (int dx = x; dx < x + tileWidth; dx++)
-                {
-                    if (dx >= source.Width)
-                    {
-                        int diff = dx - source.Width;
-                        rowPixels[idx] = source[dx - diff - 1, y].ToVector4();
-                    }
-                    else
-                    {
-                        rowPixels[idx] = source[dx, y].ToVector4();
-                    }
-
-                    idx++;
-                }
+        public int NumberOfTiles { get; }
 
-                return;
-            }
-
-            this.CopyPixelRowFast(source, rowPixels, x, y, tileWidth, configuration);
-        }
-
-        /// <summary>
-        /// Get the a pixel row at a given position with a length of the tile width.
-        /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
-        /// <param name="x">The x position.</param>
-        /// <param name="y">The y position.</param>
-        /// <param name="tileWidth">The width in pixels of a tile.</param>
-        /// <param name="configuration">The configuration.</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private void CopyPixelRowFast(
-            ImageFrame<TPixel> source,
-            Span<Vector4> rowPixels,
-            int x,
-            int y,
-            int tileWidth,
-            Configuration configuration)
-            => PixelOperations<TPixel>.Instance.ToVector4(configuration, source.GetPixelRowSpan(y).Slice(start: x, length: tileWidth), rowPixels);
-
-        /// <summary>
-        /// Adds a column of grey values to the histogram.
-        /// </summary>
-        /// <param name="greyValuesBase">The reference to the span of grey values to add.</param>
-        /// <param name="histogramBase">The reference to the histogram span.</param>
-        /// <param name="luminanceLevels">The number of different luminance levels.</param>
-        /// <param name="length">The grey values span length.</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private void AddPixelsToHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
-        {
-            for (int idx = 0; idx < length; idx++)
-            {
-                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
-                Unsafe.Add(ref histogramBase, luminance)++;
-            }
-        }
-
-        /// <summary>
-        /// Removes a column of grey values from the histogram.
-        /// </summary>
-        /// <param name="greyValuesBase">The reference to the span of grey values to remove.</param>
-        /// <param name="histogramBase">The reference to the histogram span.</param>
-        /// <param name="luminanceLevels">The number of different luminance levels.</param>
-        /// <param name="length">The grey values span length.</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        private void RemovePixelsFromHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
-        {
-            for (int idx = 0; idx < length; idx++)
-            {
-                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
-                Unsafe.Add(ref histogramBase, luminance)--;
-            }
-        }
-
-        private class SlidingWindowInfos
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            public SlidingWindowInfos(int tileWidth, int tileHeight, int halfTileWidth, int halfTileHeight, int pixeInTile)
-            {
-                this.TileWidth = tileWidth;
-                this.TileHeight = tileHeight;
-                this.HalfTileWidth = halfTileWidth;
-                this.HalfTileHeight = halfTileHeight;
-                this.PixeInTile = pixeInTile;
-            }
-
-            public int TileWidth { get; private set; }
-
-            public int TileHeight { get; private set; }
-
-            public int PixeInTile { get; private set; }
-
-            public int HalfTileWidth { get; private set; }
-
-            public int HalfTileHeight { get; private set; }
+            return new AdaptiveHistEqualizationSWProcessor<TPixel>(this.LuminanceLevels, this.ClipHistogram, this.ClipLimitPercentage, this.NumberOfTiles);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs
new file mode 100644
index 0000000000..3584b1a88b
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs
@@ -0,0 +1,390 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies an adaptive histogram equalization to the image using an sliding window approach.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AdaptiveHistEqualizationSWProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
+        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+            Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
+            Guard.MustBeLessThanOrEqualTo(tiles, 100, nameof(tiles));
+
+            this.Tiles = tiles;
+        }
+
+        /// <summary>
+        /// Gets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization.
+        /// </summary>
+        private int Tiles { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
+            int numberOfPixels = source.Width * source.Height;
+            Span<TPixel> pixels = source.GetPixelSpan();
+
+            var parallelOptions = new ParallelOptions() { MaxDegreeOfParallelism = configuration.MaxDegreeOfParallelism };
+            int tileWidth = source.Width / this.Tiles;
+            int tileHeight = tileWidth;
+            int pixeInTile = tileWidth * tileHeight;
+            int halfTileHeight = tileHeight / 2;
+            int halfTileWidth = halfTileHeight;
+            var slidingWindowInfos = new SlidingWindowInfos(tileWidth, tileHeight, halfTileWidth, halfTileHeight, pixeInTile);
+
+            using (Buffer2D<TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D<TPixel>(source.Width, source.Height))
+            {
+                // Process the inner tiles, which do not require to check the borders.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: halfTileHeight,
+                        yEnd: source.Height - halfTileHeight,
+                        useFastPath: true,
+                        configuration));
+
+                // Process the left border of the image.
+                Parallel.For(
+                    0,
+                    halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the right border of the image.
+                Parallel.For(
+                    source.Width - halfTileWidth,
+                    source.Width,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the top border of the image.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: 0,
+                        yEnd: halfTileHeight,
+                        useFastPath: false,
+                        configuration));
+
+                // Process the bottom border of the image.
+                Parallel.For(
+                    halfTileWidth,
+                    source.Width - halfTileWidth,
+                    parallelOptions,
+                    this.ProcessSlidingWindow(
+                        source,
+                        memoryAllocator,
+                        targetPixels,
+                        slidingWindowInfos,
+                        yStart: source.Height - halfTileHeight,
+                        yEnd: source.Height,
+                        useFastPath: false,
+                        configuration));
+
+                Buffer2D<TPixel>.SwapOrCopyContent(source.PixelBuffer, targetPixels);
+            }
+        }
+
+        /// <summary>
+        /// Applies the sliding window equalization to one column of the image. The window is moved from top to bottom.
+        /// Moving the window one pixel down requires to remove one row from the top of the window from the histogram and
+        /// adding a new row at the bottom.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="memoryAllocator">The memory allocator.</param>
+        /// <param name="targetPixels">The target pixels.</param>
+        /// <param name="swInfos">Informations about the sliding window dimensions.</param>
+        /// <param name="yStart">The y start position.</param>
+        /// <param name="yEnd">The y end position.</param>
+        /// <param name="useFastPath">if set to true the borders of the image will not be checked.</param>
+        /// <param name="configuration">The configuration.</param>
+        /// <returns>Action Delegate.</returns>
+        private Action<int> ProcessSlidingWindow(
+            ImageFrame<TPixel> source,
+            MemoryAllocator memoryAllocator,
+            Buffer2D<TPixel> targetPixels,
+            SlidingWindowInfos swInfos,
+            int yStart,
+            int yEnd,
+            bool useFastPath,
+            Configuration configuration)
+        {
+            return x =>
+                {
+                    using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                    using (IMemoryOwner<int> histogramBufferCopy = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                    using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+                    using (IMemoryOwner<Vector4> pixelRowBuffer = memoryAllocator.Allocate<Vector4>(swInfos.TileWidth, AllocationOptions.Clean))
+                    {
+                        Span<int> histogram = histogramBuffer.GetSpan();
+                        ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+
+                        Span<int> histogramCopy = histogramBufferCopy.GetSpan();
+                        ref int histogramCopyBase = ref MemoryMarshal.GetReference(histogramCopy);
+
+                        ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
+
+                        Span<Vector4> pixelRow = pixelRowBuffer.GetSpan();
+                        ref Vector4 pixelRowBase = ref MemoryMarshal.GetReference(pixelRow);
+
+                        // Build the initial histogram of grayscale values.
+                        for (int dy = yStart - swInfos.HalfTileHeight; dy < yStart + swInfos.HalfTileHeight; dy++)
+                        {
+                            if (useFastPath)
+                            {
+                                this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
+                            }
+                            else
+                            {
+                                this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, dy, swInfos.TileWidth, configuration);
+                            }
+
+                            this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+                        }
+
+                        for (int y = yStart; y < yEnd; y++)
+                        {
+                            if (this.ClipHistogramEnabled)
+                            {
+                                // Clipping the histogram, but doing it on a copy to keep the original un-clipped values for the next iteration.
+                                histogram.CopyTo(histogramCopy);
+                                this.ClipHistogram(histogramCopy, this.ClipLimitPercentage, swInfos.PixeInTile);
+                            }
+
+                            // Calculate the cumulative distribution function, which will map each input pixel in the current tile to a new value.
+                            int cdfMin = this.ClipHistogramEnabled
+                                             ? this.CalculateCdf(ref cdfBase, ref histogramCopyBase, histogram.Length - 1)
+                                             : this.CalculateCdf(ref cdfBase, ref histogramBase, histogram.Length - 1);
+
+                            float numberOfPixelsMinusCdfMin = swInfos.PixeInTile - cdfMin;
+
+                            // Map the current pixel to the new equalized value.
+                            int luminance = GetLuminance(source[x, y], this.LuminanceLevels);
+                            float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
+                            targetPixels[x, y].FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, source[x, y].ToVector4().W));
+
+                            // Remove top most row from the histogram, mirroring rows which exceeds the borders.
+                            if (useFastPath)
+                            {
+                                this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                            }
+                            else
+                            {
+                                this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y - swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                            }
+
+                            this.RemovePixelsFromHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+
+                            // Add new bottom row to the histogram, mirroring rows which exceeds the borders.
+                            if (useFastPath)
+                            {
+                                this.CopyPixelRowFast(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                            }
+                            else
+                            {
+                                this.CopyPixelRow(source, pixelRow, x - swInfos.HalfTileWidth, y + swInfos.HalfTileWidth, swInfos.TileWidth, configuration);
+                            }
+
+                            this.AddPixelsToHistogram(ref pixelRowBase, ref histogramBase, this.LuminanceLevels, pixelRow.Length);
+                        }
+                    }
+                };
+        }
+
+        /// <summary>
+        /// Get the a pixel row at a given position with a length of the tile width. Mirrors pixels which exceeds the edges.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
+        /// <param name="x">The x position.</param>
+        /// <param name="y">The y position.</param>
+        /// <param name="tileWidth">The width in pixels of a tile.</param>
+        /// <param name="configuration">The configuration.</param>
+        private void CopyPixelRow(
+            ImageFrame<TPixel> source,
+            Span<Vector4> rowPixels,
+            int x,
+            int y,
+            int tileWidth,
+            Configuration configuration)
+        {
+            if (y < 0)
+            {
+                y = ImageMaths.FastAbs(y);
+            }
+            else if (y >= source.Height)
+            {
+                int diff = y - source.Height;
+                y = source.Height - diff - 1;
+            }
+
+            // Special cases for the left and the right border where GetPixelRowSpan can not be used.
+            if (x < 0)
+            {
+                rowPixels.Clear();
+                int idx = 0;
+                for (int dx = x; dx < x + tileWidth; dx++)
+                {
+                    rowPixels[idx] = source[ImageMaths.FastAbs(dx), y].ToVector4();
+                    idx++;
+                }
+
+                return;
+            }
+            else if (x + tileWidth > source.Width)
+            {
+                rowPixels.Clear();
+                int idx = 0;
+                for (int dx = x; dx < x + tileWidth; dx++)
+                {
+                    if (dx >= source.Width)
+                    {
+                        int diff = dx - source.Width;
+                        rowPixels[idx] = source[dx - diff - 1, y].ToVector4();
+                    }
+                    else
+                    {
+                        rowPixels[idx] = source[dx, y].ToVector4();
+                    }
+
+                    idx++;
+                }
+
+                return;
+            }
+
+            this.CopyPixelRowFast(source, rowPixels, x, y, tileWidth, configuration);
+        }
+
+        /// <summary>
+        /// Get the a pixel row at a given position with a length of the tile width.
+        /// </summary>
+        /// <param name="source">The source image.</param>
+        /// <param name="rowPixels">Pre-allocated pixel row span of the size of a the tile width.</param>
+        /// <param name="x">The x position.</param>
+        /// <param name="y">The y position.</param>
+        /// <param name="tileWidth">The width in pixels of a tile.</param>
+        /// <param name="configuration">The configuration.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void CopyPixelRowFast(
+            ImageFrame<TPixel> source,
+            Span<Vector4> rowPixels,
+            int x,
+            int y,
+            int tileWidth,
+            Configuration configuration)
+            => PixelOperations<TPixel>.Instance.ToVector4(configuration, source.GetPixelRowSpan(y).Slice(start: x, length: tileWidth), rowPixels);
+
+        /// <summary>
+        /// Adds a column of grey values to the histogram.
+        /// </summary>
+        /// <param name="greyValuesBase">The reference to the span of grey values to add.</param>
+        /// <param name="histogramBase">The reference to the histogram span.</param>
+        /// <param name="luminanceLevels">The number of different luminance levels.</param>
+        /// <param name="length">The grey values span length.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void AddPixelsToHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
+        {
+            for (int idx = 0; idx < length; idx++)
+            {
+                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
+                Unsafe.Add(ref histogramBase, luminance)++;
+            }
+        }
+
+        /// <summary>
+        /// Removes a column of grey values from the histogram.
+        /// </summary>
+        /// <param name="greyValuesBase">The reference to the span of grey values to remove.</param>
+        /// <param name="histogramBase">The reference to the histogram span.</param>
+        /// <param name="luminanceLevels">The number of different luminance levels.</param>
+        /// <param name="length">The grey values span length.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private void RemovePixelsFromHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
+        {
+            for (int idx = 0; idx < length; idx++)
+            {
+                int luminance = GetLuminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
+                Unsafe.Add(ref histogramBase, luminance)--;
+            }
+        }
+
+        private class SlidingWindowInfos
+        {
+            public SlidingWindowInfos(int tileWidth, int tileHeight, int halfTileWidth, int halfTileHeight, int pixeInTile)
+            {
+                this.TileWidth = tileWidth;
+                this.TileHeight = tileHeight;
+                this.HalfTileWidth = halfTileWidth;
+                this.HalfTileHeight = halfTileHeight;
+                this.PixeInTile = pixeInTile;
+            }
+
+            public int TileWidth { get; private set; }
+
+            public int TileHeight { get; private set; }
+
+            public int PixeInTile { get; private set; }
+
+            public int HalfTileWidth { get; private set; }
+
+            public int HalfTileHeight { get; private set; }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
index aadde2424b..62e0185950 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
@@ -1,106 +1,25 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
-
 namespace SixLabors.ImageSharp.Processing.Processors.Normalization
 {
     /// <summary>
-    /// Applies a global histogram equalization to the image.
+    /// Defines a global histogram equalization applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GlobalHistogramEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal class GlobalHistogramEqualizationProcessor : HistogramEqualizationProcessor
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GlobalHistogramEqualizationProcessor{TPixel}"/> class.
-        /// </summary>
-        /// <param name="luminanceLevels">
-        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
-        /// or 65536 for 16-bit grayscale images.
-        /// </param>
-        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
-        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels. Histogram bins which exceed this limit, will be capped at this value.</param>
         public GlobalHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
         }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
-            int numberOfPixels = source.Width * source.Height;
-            Span<TPixel> pixels = source.GetPixelSpan();
-            var workingRect = new Rectangle(0, 0, source.Width, source.Height);
-
-            using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-            using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
-            {
-                // Build the histogram of the grayscale levels.
-                ParallelHelper.IterateRows(
-                    workingRect,
-                    configuration,
-                    rows =>
-                    {
-                        ref int histogramBase = ref MemoryMarshal.GetReference(histogramBuffer.GetSpan());
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
-
-                            for (int x = 0; x < workingRect.Width; x++)
-                            {
-                                int luminance = GetLuminance(Unsafe.Add(ref pixelBase, x), this.LuminanceLevels);
-                                Unsafe.Add(ref histogramBase, luminance)++;
-                            }
-                        }
-                    });
-
-                Span<int> histogram = histogramBuffer.GetSpan();
-                if (this.ClipHistogramEnabled)
-                {
-                    this.ClipHistogram(histogram, this.ClipLimitPercentage, numberOfPixels);
-                }
-
-                // Calculate the cumulative distribution function, which will map each input pixel to a new value.
-                int cdfMin = this.CalculateCdf(
-                    ref MemoryMarshal.GetReference(cdfBuffer.GetSpan()),
-                    ref MemoryMarshal.GetReference(histogram),
-                    histogram.Length - 1);
-
-                float numberOfPixelsMinusCdfMin = numberOfPixels - cdfMin;
-
-                // Apply the cdf to each pixel of the image
-                ParallelHelper.IterateRows(
-                    workingRect,
-                    configuration,
-                    rows =>
-                    {
-                        ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
-
-                            for (int x = 0; x < workingRect.Width; x++)
-                            {
-                                ref TPixel pixel = ref Unsafe.Add(ref pixelBase, x);
-                                int luminance = GetLuminance(pixel, this.LuminanceLevels);
-                                float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
-                                pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
-                            }
-                        }
-                    });
-            }
+            return new GlobalHistogramEqualizationProcessor<TPixel>(
+                this.LuminanceLevels,
+                this.ClipHistogram,
+                this.ClipLimitPercentage);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor{TPixel}.cs
new file mode 100644
index 0000000000..b3a1603e6f
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor{TPixel}.cs
@@ -0,0 +1,107 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Applies a global histogram equalization to the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class GlobalHistogramEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GlobalHistogramEqualizationProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">
+        /// The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.
+        /// </param>
+        /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels. Histogram bins which exceed this limit, will be capped at this value.</param>
+        public GlobalHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
+            : base(luminanceLevels, clipHistogram, clipLimitPercentage)
+        {
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            MemoryAllocator memoryAllocator = configuration.MemoryAllocator;
+            int numberOfPixels = source.Width * source.Height;
+            Span<TPixel> pixels = source.GetPixelSpan();
+            var workingRect = new Rectangle(0, 0, source.Width, source.Height);
+
+            using (IMemoryOwner<int> histogramBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            using (IMemoryOwner<int> cdfBuffer = memoryAllocator.Allocate<int>(this.LuminanceLevels, AllocationOptions.Clean))
+            {
+                // Build the histogram of the grayscale levels.
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                        {
+                            ref int histogramBase = ref MemoryMarshal.GetReference(histogramBuffer.GetSpan());
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
+
+                                for (int x = 0; x < workingRect.Width; x++)
+                                {
+                                    int luminance = GetLuminance(Unsafe.Add(ref pixelBase, x), this.LuminanceLevels);
+                                    Unsafe.Add(ref histogramBase, luminance)++;
+                                }
+                            }
+                        });
+
+                Span<int> histogram = histogramBuffer.GetSpan();
+                if (this.ClipHistogramEnabled)
+                {
+                    this.ClipHistogram(histogram, this.ClipLimitPercentage, numberOfPixels);
+                }
+
+                // Calculate the cumulative distribution function, which will map each input pixel to a new value.
+                int cdfMin = this.CalculateCdf(
+                    ref MemoryMarshal.GetReference(cdfBuffer.GetSpan()),
+                    ref MemoryMarshal.GetReference(histogram),
+                    histogram.Length - 1);
+
+                float numberOfPixelsMinusCdfMin = numberOfPixels - cdfMin;
+
+                // Apply the cdf to each pixel of the image
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                        {
+                            ref int cdfBase = ref MemoryMarshal.GetReference(cdfBuffer.GetSpan());
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                ref TPixel pixelBase = ref MemoryMarshal.GetReference(source.GetPixelRowSpan(y));
+
+                                for (int x = 0; x < workingRect.Width; x++)
+                                {
+                                    ref TPixel pixel = ref Unsafe.Add(ref pixelBase, x);
+                                    int luminance = GetLuminance(pixel, this.LuminanceLevels);
+                                    float luminanceEqualized = Unsafe.Add(ref cdfBase, luminance) / numberOfPixelsMinusCdfMin;
+                                    pixel.FromVector4(new Vector4(luminanceEqualized, luminanceEqualized, luminanceEqualized, pixel.ToVector4().W));
+                                }
+                            }
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
index 0d1a378361..1d9d5c986a 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs
@@ -38,6 +38,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <summary>
         /// Gets or sets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization. Defaults to 10.
         /// </summary>
-        public int Tiles { get; set; } = 10;
+        public int NumberOfTiles { get; set; } = 10;
     }
 }
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
index fd1b6b9784..4aad1f564e 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
@@ -1,10 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Normalization
@@ -12,14 +8,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// <summary>
     /// Defines a processor that normalizes the histogram of an image.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class HistogramEqualizationProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    internal abstract class HistogramEqualizationProcessor : IImageProcessor
     {
-        private readonly float luminanceLevelsFloat;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="HistogramEqualizationProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="HistogramEqualizationProcessor"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
@@ -27,12 +19,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         protected HistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
         {
-            Guard.MustBeGreaterThan(luminanceLevels, 0, nameof(luminanceLevels));
-            Guard.MustBeGreaterThan(clipLimitPercentage, 0F, nameof(clipLimitPercentage));
-
             this.LuminanceLevels = luminanceLevels;
-            this.luminanceLevelsFloat = luminanceLevels;
-            this.ClipHistogramEnabled = clipHistogram;
+            this.ClipHistogram = clipHistogram;
             this.ClipLimitPercentage = clipLimitPercentage;
         }
 
@@ -44,95 +32,61 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <summary>
         /// Gets a value indicating whether to clip the histogram bins at a specific value.
         /// </summary>
-        public bool ClipHistogramEnabled { get; }
+        public bool ClipHistogram { get; }
 
         /// <summary>
         /// Gets the histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.
         /// </summary>
         public float ClipLimitPercentage { get; }
 
-        /// <summary>
-        /// Calculates the cumulative distribution function.
-        /// </summary>
-        /// <param name="cdfBase">The reference to the array holding the cdf.</param>
-        /// <param name="histogramBase">The reference to the histogram of the input image.</param>
-        /// <param name="maxIdx">Index of the maximum of the histogram.</param>
-        /// <returns>The first none zero value of the cdf.</returns>
-        public int CalculateCdf(ref int cdfBase, ref int histogramBase, int maxIdx)
-        {
-            int histSum = 0;
-            int cdfMin = 0;
-            bool cdfMinFound = false;
-
-            for (int i = 0; i <= maxIdx; i++)
-            {
-                histSum += Unsafe.Add(ref histogramBase, i);
-                if (!cdfMinFound && histSum != 0)
-                {
-                    cdfMin = histSum;
-                    cdfMinFound = true;
-                }
-
-                // Creating the lookup table: subtracting cdf min, so we do not need to do that inside the for loop.
-                Unsafe.Add(ref cdfBase, i) = Math.Max(0, histSum - cdfMin);
-            }
-
-            return cdfMin;
-        }
+        /// <inheritdoc />
+        public abstract IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>;
 
         /// <summary>
-        /// AHE tends to over amplify the contrast in near-constant regions of the image, since the histogram in such regions is highly concentrated.
-        /// Clipping the histogram is meant to reduce this effect, by cutting of histogram bin's which exceed a certain amount and redistribute
-        /// the values over the clip limit to all other bins equally.
+        /// Creates the <see cref="HistogramEqualizationProcessor"/> that implements the algorithm
+        /// defined by the given <see cref="HistogramEqualizationOptions"/>.
         /// </summary>
-        /// <param name="histogram">The histogram to apply the clipping.</param>
-        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
-        /// <param name="pixelCount">The numbers of pixels inside the tile.</param>
-        public void ClipHistogram(Span<int> histogram, float clipLimitPercentage, int pixelCount)
+        /// <param name="options">The <see cref="HistogramEqualizationOptions"/>.</param>
+        /// <returns>The <see cref="HistogramEqualizationProcessor"/>.</returns>
+        public static HistogramEqualizationProcessor FromOptions(HistogramEqualizationOptions options)
         {
-            int clipLimit = (int)MathF.Round(pixelCount * clipLimitPercentage);
-            int sumOverClip = 0;
-            ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+            HistogramEqualizationProcessor processor;
 
-            for (int i = 0; i < histogram.Length; i++)
+            switch (options.Method)
             {
-                ref int histogramLevel = ref Unsafe.Add(ref histogramBase, i);
-                if (histogramLevel > clipLimit)
-                {
-                    sumOverClip += histogramLevel - clipLimit;
-                    histogramLevel = clipLimit;
-                }
+                case HistogramEqualizationMethod.Global:
+                    processor = new GlobalHistogramEqualizationProcessor(
+                        options.LuminanceLevels,
+                        options.ClipHistogram,
+                        options.ClipLimitPercentage);
+                    break;
+
+                case HistogramEqualizationMethod.AdaptiveTileInterpolation:
+                    processor = new AdaptiveHistEqualizationProcessor(
+                        options.LuminanceLevels,
+                        options.ClipHistogram,
+                        options.ClipLimitPercentage,
+                        options.NumberOfTiles);
+                    break;
+
+                case HistogramEqualizationMethod.AdaptiveSlidingWindow:
+                    processor = new AdaptiveHistEqualizationSWProcessor(
+                        options.LuminanceLevels,
+                        options.ClipHistogram,
+                        options.ClipLimitPercentage,
+                        options.NumberOfTiles);
+                    break;
+
+                default:
+                    processor = new GlobalHistogramEqualizationProcessor(
+                        options.LuminanceLevels,
+                        options.ClipHistogram,
+                        options.ClipLimitPercentage);
+                    break;
             }
 
-            int addToEachBin = sumOverClip > 0 ? (int)MathF.Floor(sumOverClip / this.luminanceLevelsFloat) : 0;
-            if (addToEachBin > 0)
-            {
-                for (int i = 0; i < histogram.Length; i++)
-                {
-                    Unsafe.Add(ref histogramBase, i) += addToEachBin;
-                }
-            }
+            return processor;
         }
-
-        /// <summary>
-        /// Convert the pixel values to grayscale using ITU-R Recommendation BT.709.
-        /// </summary>
-        /// <param name="sourcePixel">The pixel to get the luminance from</param>
-        /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        public static int GetLuminance(TPixel sourcePixel, int luminanceLevels)
-        {
-            var vector = sourcePixel.ToVector4();
-            return GetLuminance(ref vector, luminanceLevels);
-        }
-
-        /// <summary>
-        /// Convert the pixel values to grayscale using ITU-R Recommendation BT.709.
-        /// </summary>
-        /// <param name="vector">The vector to get the luminance from</param>
-        /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        public static int GetLuminance(ref Vector4 vector, int luminanceLevels)
-            => (int)MathF.Round(((.2126F * vector.X) + (.7152F * vector.Y) + (.0722F * vector.Y)) * (luminanceLevels - 1));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor{TPixel}.cs
new file mode 100644
index 0000000000..8dbc903f29
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor{TPixel}.cs
@@ -0,0 +1,139 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Normalization
+{
+    /// <summary>
+    /// Defines a processor that normalizes the histogram of an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal abstract class HistogramEqualizationProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly float luminanceLevelsFloat;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HistogramEqualizationProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
+        /// or 65536 for 16-bit grayscale images.</param>
+        /// <param name="clipHistogram">Indicates, if histogram bins should be clipped.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        protected HistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
+        {
+            Guard.MustBeGreaterThan(luminanceLevels, 0, nameof(luminanceLevels));
+            Guard.MustBeGreaterThan(clipLimitPercentage, 0F, nameof(clipLimitPercentage));
+
+            this.LuminanceLevels = luminanceLevels;
+            this.luminanceLevelsFloat = luminanceLevels;
+            this.ClipHistogramEnabled = clipHistogram;
+            this.ClipLimitPercentage = clipLimitPercentage;
+        }
+
+        /// <summary>
+        /// Gets the number of luminance levels.
+        /// </summary>
+        public int LuminanceLevels { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether to clip the histogram bins at a specific value.
+        /// </summary>
+        public bool ClipHistogramEnabled { get; }
+
+        /// <summary>
+        /// Gets the histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.
+        /// </summary>
+        public float ClipLimitPercentage { get; }
+
+        /// <summary>
+        /// Calculates the cumulative distribution function.
+        /// </summary>
+        /// <param name="cdfBase">The reference to the array holding the cdf.</param>
+        /// <param name="histogramBase">The reference to the histogram of the input image.</param>
+        /// <param name="maxIdx">Index of the maximum of the histogram.</param>
+        /// <returns>The first none zero value of the cdf.</returns>
+        public int CalculateCdf(ref int cdfBase, ref int histogramBase, int maxIdx)
+        {
+            int histSum = 0;
+            int cdfMin = 0;
+            bool cdfMinFound = false;
+
+            for (int i = 0; i <= maxIdx; i++)
+            {
+                histSum += Unsafe.Add(ref histogramBase, i);
+                if (!cdfMinFound && histSum != 0)
+                {
+                    cdfMin = histSum;
+                    cdfMinFound = true;
+                }
+
+                // Creating the lookup table: subtracting cdf min, so we do not need to do that inside the for loop.
+                Unsafe.Add(ref cdfBase, i) = Math.Max(0, histSum - cdfMin);
+            }
+
+            return cdfMin;
+        }
+
+        /// <summary>
+        /// AHE tends to over amplify the contrast in near-constant regions of the image, since the histogram in such regions is highly concentrated.
+        /// Clipping the histogram is meant to reduce this effect, by cutting of histogram bin's which exceed a certain amount and redistribute
+        /// the values over the clip limit to all other bins equally.
+        /// </summary>
+        /// <param name="histogram">The histogram to apply the clipping.</param>
+        /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
+        /// <param name="pixelCount">The numbers of pixels inside the tile.</param>
+        public void ClipHistogram(Span<int> histogram, float clipLimitPercentage, int pixelCount)
+        {
+            int clipLimit = (int)MathF.Round(pixelCount * clipLimitPercentage);
+            int sumOverClip = 0;
+            ref int histogramBase = ref MemoryMarshal.GetReference(histogram);
+
+            for (int i = 0; i < histogram.Length; i++)
+            {
+                ref int histogramLevel = ref Unsafe.Add(ref histogramBase, i);
+                if (histogramLevel > clipLimit)
+                {
+                    sumOverClip += histogramLevel - clipLimit;
+                    histogramLevel = clipLimit;
+                }
+            }
+
+            int addToEachBin = sumOverClip > 0 ? (int)MathF.Floor(sumOverClip / this.luminanceLevelsFloat) : 0;
+            if (addToEachBin > 0)
+            {
+                for (int i = 0; i < histogram.Length; i++)
+                {
+                    Unsafe.Add(ref histogramBase, i) += addToEachBin;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Convert the pixel values to grayscale using ITU-R Recommendation BT.709.
+        /// </summary>
+        /// <param name="sourcePixel">The pixel to get the luminance from</param>
+        /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static int GetLuminance(TPixel sourcePixel, int luminanceLevels)
+        {
+            var vector = sourcePixel.ToVector4();
+            return GetLuminance(ref vector, luminanceLevels);
+        }
+
+        /// <summary>
+        /// Convert the pixel values to grayscale using ITU-R Recommendation BT.709.
+        /// </summary>
+        /// <param name="vector">The vector to get the luminance from</param>
+        /// <param name="luminanceLevels">The number of luminance levels (256 for 8 bit, 65536 for 16 bit grayscale images)</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static int GetLuminance(ref Vector4 vector, int luminanceLevels)
+            => (int)MathF.Round(((.2126F * vector.X) + (.7152F * vector.Y) + (.0722F * vector.Y)) * (luminanceLevels - 1));
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs b/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
index 84d592bd96..fc9a583dd1 100644
--- a/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Normalization
                     Method = HistogramEqualizationMethod.AdaptiveSlidingWindow,
                     LuminanceLevels = 256,
                     ClipHistogram = true,
-                    Tiles = 15
+                    NumberOfTiles = 15
                 };
                 image.Mutate(x => x.HistogramEqualization(options));
                 image.DebugSave(provider);
@@ -106,7 +106,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Normalization
                     Method = HistogramEqualizationMethod.AdaptiveTileInterpolation,
                     LuminanceLevels = 256,
                     ClipHistogram = true,
-                    Tiles = 10
+                    NumberOfTiles = 10
                 };
                 image.Mutate(x => x.HistogramEqualization(options));
                 image.DebugSave(provider);
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
index cb901c2a88..91422faaa1 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
@@ -50,8 +50,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         /// The output is visually correct old 32bit runtime,
         /// but it is very different because of floating point inaccuracies.
         /// </summary>
-        private static readonly bool SkipAllDitherTests =
-            !TestEnvironment.Is64BitProcess && string.IsNullOrEmpty(TestEnvironment.NetCoreVersion);
+        private static readonly bool SkipAllDitherTests = false;
 
         [Theory]
         [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]

From fa1e0baced645949989929db33a59683855c509e Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 17:43:06 +0200
Subject: [PATCH 133/223] cache Image dimensions into a field + re-enable all
 target frameworks

---
 .../ImageSharp.Drawing.csproj                 |  4 +-
 src/ImageSharp/Image.cs                       | 39 +++++++++++++---
 src/ImageSharp/ImageSharp.csproj              |  3 +-
 src/ImageSharp/Image{TPixel}.cs               | 45 +++++++++++++------
 4 files changed, 68 insertions(+), 23 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 1734c48de2..ac5d7fdea6 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -10,8 +10,8 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index d0a1c4319d..1566fd0eed 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -7,6 +7,7 @@ using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp
 {
@@ -17,19 +18,36 @@ namespace SixLabors.ImageSharp
     /// </summary>
     public abstract partial class Image : IImage, IConfigurable
     {
+        private Size size;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="Image"/> class.
         /// </summary>
         /// <param name="configuration">The <see cref="Configuration"/>.</param>
         /// <param name="pixelType">The <see cref="PixelTypeInfo"/>.</param>
         /// <param name="metadata">The <see cref="ImageMetadata"/>.</param>
-        protected Image(Configuration configuration, PixelTypeInfo pixelType, ImageMetadata metadata)
+        /// <param name="size">The <see cref="size"/>.</param>
+        protected Image(Configuration configuration, PixelTypeInfo pixelType, ImageMetadata metadata, Size size)
         {
             this.Configuration = configuration ?? Configuration.Default;
             this.PixelType = pixelType;
+            this.size = size;
             this.Metadata = metadata ?? new ImageMetadata();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Image"/> class.
+        /// </summary>
+        internal Image(
+            Configuration configuration,
+            PixelTypeInfo pixelType,
+            ImageMetadata metadata,
+            int width,
+            int height)
+            : this(configuration, pixelType, metadata, new Size(width, height))
+        {
+        }
+
         /// <summary>
         /// Gets the <see cref="Configuration"/>.
         /// </summary>
@@ -39,10 +57,10 @@ namespace SixLabors.ImageSharp
         public PixelTypeInfo PixelType { get; }
 
         /// <inheritdoc />
-        public abstract int Width { get; }
+        public int Width => this.size.Width;
 
         /// <inheritdoc />
-        public abstract int Height { get; }
+        public int Height => this.size.Height;
 
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
@@ -55,8 +73,6 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc />
         public abstract void Dispose();
 
-        internal abstract void AcceptVisitor(IImageVisitor visitor);
-
         /// <summary>
         /// Saves the image to the given stream using the given image encoder.
         /// </summary>
@@ -72,6 +88,19 @@ namespace SixLabors.ImageSharp
             this.AcceptVisitor(visitor);
         }
 
+        /// <summary>
+        /// Accept a <see cref="IImageVisitor"/>.
+        /// Implemented by <see cref="Image{TPixel}"/> invoking <see cref="IImageVisitor.Visit{TPixel}"/>
+        /// with the pixel type of the image.
+        /// </summary>
+        internal abstract void AcceptVisitor(IImageVisitor visitor);
+
+        /// <summary>
+        /// Update the size of the image after mutation.
+        /// </summary>
+        /// <param name="size">The <see cref="Size"/>.</param>
+        protected void UpdateSize(Size size) => this.size = size;
+
         private class EncodeVisitor : IImageVisitor
         {
             private readonly IImageEncoder encoder;
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index f780ca666a..e763b8ef1c 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -11,8 +11,7 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
       
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 243e2912be..27e2bc593c 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -3,14 +3,13 @@
 
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
-using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp
 {
@@ -67,14 +66,14 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, int width, int height, ImageMetadata metadata)
-            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, width, height)
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, default(TPixel));
         }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Image{TPixel}"/> class
-        /// wrapping an external <see cref="MemorySource{T}"/>
+        /// wrapping an external <see cref="MemorySource{T}"/>.
         /// </summary>
         /// <param name="configuration">The configuration providing initialization code which allows extending the library.</param>
         /// <param name="memorySource">The memory source.</param>
@@ -82,7 +81,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetadata metadata)
-            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, width, height)
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, memorySource);
         }
@@ -97,7 +96,7 @@ namespace SixLabors.ImageSharp
         /// <param name="backgroundColor">The color to initialize the pixels with.</param>
         /// <param name="metadata">The images metadata.</param>
         internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetadata metadata)
-            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, width, height)
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, backgroundColor);
         }
@@ -110,17 +109,11 @@ namespace SixLabors.ImageSharp
         /// <param name="metadata">The images metadata.</param>
         /// <param name="frames">The frames that will be owned by this image instance.</param>
         internal Image(Configuration configuration, ImageMetadata metadata, IEnumerable<ImageFrame<TPixel>> frames)
-            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata)
+            : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, ValidateFramesAndGetSize(frames))
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, frames);
         }
 
-        /// <inheritdoc/>
-        public override int Width => this.Frames.RootFrame.Width;
-
-        /// <inheritdoc/>
-        public override int Height => this.Frames.RootFrame.Height;
-
         /// <summary>
         /// Gets the frames.
         /// </summary>
@@ -173,7 +166,7 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <typeparam name="TPixel2">The pixel format.</typeparam>
         /// <param name="configuration">The configuration providing initialization code which allows extending the library.</param>
-        /// <returns>The <see cref="Image{TPixel2}"/></returns>
+        /// <returns>The <see cref="Image{TPixel2}"/>.</returns>
         public Image<TPixel2> CloneAs<TPixel2>(Configuration configuration)
             where TPixel2 : struct, IPixel<TPixel2>
         {
@@ -184,6 +177,7 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public override void Dispose() => this.Frames.Dispose();
 
+        /// <inheritdoc />
         internal override void AcceptVisitor(IImageVisitor visitor)
         {
             visitor.Visit(this);
@@ -204,6 +198,29 @@ namespace SixLabors.ImageSharp
             {
                 this.Frames[i].SwapOrCopyPixelsBufferFrom(pixelSource.Frames[i]);
             }
+
+            this.UpdateSize(pixelSource.Size());
+        }
+
+        private static Size ValidateFramesAndGetSize(IEnumerable<ImageFrame<TPixel>> frames)
+        {
+            Guard.NotNull(frames, nameof(frames));
+
+            ImageFrame<TPixel> rootFrame = frames.FirstOrDefault();
+
+            if (rootFrame == null)
+            {
+                throw new ArgumentException("Must not be empty.", nameof(frames));
+            }
+
+            Size rootSize = rootFrame.Size();
+
+            if (frames.Any(f => f.Size() != rootSize))
+            {
+                throw new ArgumentException("The provided frames must be of the same size.", nameof(frames));
+            }
+
+            return rootSize;
         }
     }
 }
\ No newline at end of file

From 5215a13cbba354ed0fe1e7fdf5e92e81a1d9912a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 19:33:34 +0200
Subject: [PATCH 134/223] fix Image.FromStream() + add tests

---
 src/ImageSharp/Formats/Bmp/ImageExtensions.cs |  19 +-
 src/ImageSharp/Formats/Gif/ImageExtensions.cs |  19 +-
 .../Formats/Jpeg/ImageExtensions.cs           |  19 +-
 src/ImageSharp/Formats/Png/ImageExtensions.cs |  18 +-
 src/ImageSharp/Image.FromBytes.cs             | 207 +++++++++++++-----
 src/ImageSharp/Image.FromFile.cs              |  16 +-
 src/ImageSharp/Image.FromStream.cs            |  50 +++--
 .../Drawing/RecolorImageTest.cs               |   4 +-
 .../Drawing/SolidPolygonTests.cs              |   2 +-
 .../Formats/Bmp/BmpEncoderTests.cs            |   4 +-
 .../Formats/GeneralFormatTests.cs             |   6 +-
 .../Formats/Gif/GifDecoderTests.cs            |   6 +-
 .../Formats/Gif/GifEncoderTests.cs            |   6 +-
 .../Formats/Jpg/JpegDecoderTests.MetaData.cs  |   2 +-
 .../Formats/Jpg/JpegEncoderTests.cs           |   8 +-
 .../Formats/Png/PngDecoderTests.cs            |   6 +-
 .../Formats/Png/PngEncoderTests.cs            |   6 +-
 .../Image/ImageTests.ImageLoadTestBase.cs     |  25 ++-
 .../Image/ImageTests.Load_FileSystemPath.cs   |   2 +-
 .../Image/ImageTests.Load_FromBytes.cs        | 120 ----------
 ...s.Load_FromBytes_PassLocalConfiguration.cs | 119 ++++++++++
 ...s.Load_FromBytes_UseGlobalConfiguration.cs | 101 +++++++++
 .../Image/ImageTests.Load_FromStream.cs       | 102 ---------
 ....Load_FromStream_PassLocalConfiguration.cs |  93 ++++++++
 ...Load_FromStream_UseDefaultConfiguration.cs |  95 ++++++++
 .../Profiles/Exif/ExifProfileTests.cs         |  12 +-
 .../MetaData/Profiles/Exif/ExifValueTests.cs  |   2 +-
 .../PorterDuffCompositorTests.cs              |   2 +-
 tests/ImageSharp.Tests/TestFile.cs            |   6 +-
 tests/ImageSharp.Tests/TestFileSystem.cs      |  31 +--
 tests/ImageSharp.Tests/TestFormat.cs          |  63 +++++-
 .../Tests/ReferenceDecoderBenchmarks.cs       |   2 +-
 32 files changed, 761 insertions(+), 412 deletions(-)
 delete mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_PassLocalConfiguration.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
 delete mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_PassLocalConfiguration.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs

diff --git a/src/ImageSharp/Formats/Bmp/ImageExtensions.cs b/src/ImageSharp/Formats/Bmp/ImageExtensions.cs
index aa1c353db2..0c37907c22 100644
--- a/src/ImageSharp/Formats/Bmp/ImageExtensions.cs
+++ b/src/ImageSharp/Formats/Bmp/ImageExtensions.cs
@@ -2,38 +2,35 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Bmp;
-using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Extension methods for the <see cref="Image{TPixel}"/> type.
+    /// Extension methods for the <see cref="Image"/> type.
     /// </summary>
     public static partial class ImageExtensions
     {
         /// <summary>
         /// Saves the image to the given stream with the bmp format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsBmp<TPixel>(this Image<TPixel> source, Stream stream)
-            where TPixel : struct, IPixel<TPixel>
-                        => source.SaveAsBmp(stream, null);
+        public static void SaveAsBmp(this Image source, Stream stream) => source.SaveAsBmp(stream, null);
 
         /// <summary>
         /// Saves the image to the given stream with the bmp format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsBmp<TPixel>(this Image<TPixel> source, Stream stream, BmpEncoder encoder)
-            where TPixel : struct, IPixel<TPixel>
-                        => source.Save(stream, encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
+        public static void SaveAsBmp(this Image source, Stream stream, BmpEncoder encoder) =>
+            source.Save(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance));
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Gif/ImageExtensions.cs b/src/ImageSharp/Formats/Gif/ImageExtensions.cs
index 8ddd4247e1..c7ac001ff5 100644
--- a/src/ImageSharp/Formats/Gif/ImageExtensions.cs
+++ b/src/ImageSharp/Formats/Gif/ImageExtensions.cs
@@ -2,38 +2,35 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Extension methods for the <see cref="Image{TPixel}"/> type.
+    /// Extension methods for the <see cref="Image"/> type.
     /// </summary>
     public static partial class ImageExtensions
     {
         /// <summary>
         /// Saves the image to the given stream in the gif format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsGif<TPixel>(this Image<TPixel> source, Stream stream)
-            where TPixel : struct, IPixel<TPixel>
-             => source.SaveAsGif(stream, null);
+        public static void SaveAsGif(this Image source, Stream stream) => source.SaveAsGif(stream, null);
 
         /// <summary>
         /// Saves the image to the given stream in the gif format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsGif<TPixel>(this Image<TPixel> source, Stream stream, GifEncoder encoder)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Save(stream, encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
+        public static void SaveAsGif(this Image source, Stream stream, GifEncoder encoder) =>
+            source.Save(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance));
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Jpeg/ImageExtensions.cs b/src/ImageSharp/Formats/Jpeg/ImageExtensions.cs
index cb7fc19446..7fec050b4a 100644
--- a/src/ImageSharp/Formats/Jpeg/ImageExtensions.cs
+++ b/src/ImageSharp/Formats/Jpeg/ImageExtensions.cs
@@ -2,38 +2,35 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats.Jpeg;
-using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Extension methods for the <see cref="Image{TPixel}"/> type.
+    /// Extension methods for the <see cref="Image"/> type.
     /// </summary>
     public static partial class ImageExtensions
     {
         /// <summary>
         /// Saves the image to the given stream with the jpeg format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsJpeg<TPixel>(this Image<TPixel> source, Stream stream)
-            where TPixel : struct, IPixel<TPixel>
-         => SaveAsJpeg(source, stream, null);
+        public static void SaveAsJpeg(this Image source, Stream stream) => SaveAsJpeg(source, stream, null);
 
         /// <summary>
         /// Saves the image to the given stream with the jpeg format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsJpeg<TPixel>(this Image<TPixel> source, Stream stream, JpegEncoder encoder)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Save(stream, encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
+        public static void SaveAsJpeg(this Image source, Stream stream, JpegEncoder encoder) =>
+            source.Save(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance));
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Png/ImageExtensions.cs b/src/ImageSharp/Formats/Png/ImageExtensions.cs
index c73ec6f57e..af56830f42 100644
--- a/src/ImageSharp/Formats/Png/ImageExtensions.cs
+++ b/src/ImageSharp/Formats/Png/ImageExtensions.cs
@@ -2,39 +2,35 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
+
 using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Png;
-using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Extension methods for the <see cref="Image{TPixel}"/> type.
+    /// Extension methods for the <see cref="Image"/> type.
     /// </summary>
     public static partial class ImageExtensions
     {
         /// <summary>
         /// Saves the image to the given stream with the png format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsPng<TPixel>(this Image<TPixel> source, Stream stream)
-            where TPixel : struct, IPixel<TPixel>
-                => SaveAsPng(source, stream, null);
+        public static void SaveAsPng(this Image source, Stream stream) => SaveAsPng(source, stream, null);
 
         /// <summary>
         /// Saves the image to the given stream with the png format.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The options for the encoder.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        public static void SaveAsPng<TPixel>(this Image<TPixel> source, Stream stream, PngEncoder encoder)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Save(stream, encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
+        public static void SaveAsPng(this Image source, Stream stream, PngEncoder encoder) =>
+            source.Save(
+                stream,
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image.FromBytes.cs b/src/ImageSharp/Image.FromBytes.cs
index 24a169f6e9..25dc5a1e0e 100644
--- a/src/ImageSharp/Image.FromBytes.cs
+++ b/src/ImageSharp/Image.FromBytes.cs
@@ -44,48 +44,6 @@ namespace SixLabors.ImageSharp
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
         public static Image<Rgba32> Load(byte[] data) => Load<Rgba32>(Configuration.Default, data);
 
-        /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
-        /// </summary>
-        /// <param name="data">The byte array containing encoded image data.</param>
-        /// <param name="format">The mime type of the decoded image.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(byte[] data, out IImageFormat format) => Load<Rgba32>(Configuration.Default, data, out format);
-
-        /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
-        /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="data">The byte array containing encoded image data.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, byte[] data) => Load<Rgba32>(config, data);
-
-        /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
-        /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="data">The byte array containing image data.</param>
-        /// <param name="format">The mime type of the decoded image.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, byte[] data, out IImageFormat format) => Load<Rgba32>(config, data, out format);
-
-        /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
-        /// </summary>
-        /// <param name="data">The byte array containing encoded image data.</param>
-        /// <param name="decoder">The decoder.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(byte[] data, IImageDecoder decoder) => Load<Rgba32>(data, decoder);
-
-        /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
-        /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="data">The byte array containing image data.</param>
-        /// <param name="decoder">The decoder.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, byte[] data, IImageDecoder decoder) => Load<Rgba32>(config, data, decoder);
-
         /// <summary>
         /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte array.
         /// </summary>
@@ -117,9 +75,9 @@ namespace SixLabors.ImageSharp
         public static Image<TPixel> Load<TPixel>(Configuration config, byte[] data)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (var steram = new MemoryStream(data))
+            using (var stream = new MemoryStream(data))
             {
-                return Load<TPixel>(config, steram);
+                return Load<TPixel>(config, stream);
             }
         }
 
@@ -211,29 +169,36 @@ namespace SixLabors.ImageSharp
         }
 
         /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte span.
+        /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte span.
         /// </summary>
-        /// <param name="data">The byte span containing image data.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(ReadOnlySpan<byte> data) => Load<Rgba32>(Configuration.Default, data);
+        /// <param name="data">The byte span containing encoded image data.</param>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
+        public static Image<TPixel> Load<TPixel>(ReadOnlySpan<byte> data)
+            where TPixel : struct, IPixel<TPixel>
+            => Load<TPixel>(Configuration.Default, data);
 
         /// <summary>
-        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte span.
+        /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte array.
         /// </summary>
-        /// <param name="config">The config for the decoder.</param>
-        /// <param name="data">The byte span containing encoded image data.</param>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image<Rgba32> Load(Configuration config, ReadOnlySpan<byte> data) => Load<Rgba32>(config, data);
+        /// <param name="data">The byte span containing image data.</param>
+        /// <param name="format">The mime type of the decoded image.</param>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
+        public static Image<TPixel> Load<TPixel>(ReadOnlySpan<byte> data, out IImageFormat format)
+            where TPixel : struct, IPixel<TPixel>
+            => Load<TPixel>(Configuration.Default, data, out format);
 
         /// <summary>
-        /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte span.
+        /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte array.
         /// </summary>
         /// <param name="data">The byte span containing encoded image data.</param>
+        /// <param name="decoder">The decoder.</param>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
-        public static Image<TPixel> Load<TPixel>(ReadOnlySpan<byte> data)
+        public static Image<TPixel> Load<TPixel>(ReadOnlySpan<byte> data, IImageDecoder decoder)
             where TPixel : struct, IPixel<TPixel>
-            => Load<TPixel>(Configuration.Default, data);
+            => Load<TPixel>(Configuration.Default, data, decoder);
 
         /// <summary>
         /// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte span.
@@ -299,5 +264,135 @@ namespace SixLabors.ImageSharp
                 }
             }
         }
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="data">The byte array containing image data.</param>
+        /// <param name="format">The detected format.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static Image Load(byte[] data, out IImageFormat format) =>
+            Load(Configuration.Default, data, out format);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="data">The byte array containing encoded image data.</param>
+        /// <param name="decoder">The decoder.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static Image Load(byte[] data, IImageDecoder decoder) => Load(Configuration.Default, data, decoder);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="config">The config for the decoder.</param>
+        /// <param name="data">The byte array containing encoded image data.</param>
+        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
+        public static Image Load(Configuration config, byte[] data) => Load(config, data, out _);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="config">The config for the decoder.</param>
+        /// <param name="data">The byte array containing image data.</param>
+        /// <param name="decoder">The decoder.</param>
+        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
+        public static Image Load(Configuration config, byte[] data, IImageDecoder decoder)
+        {
+            using (var stream = new MemoryStream(data))
+            {
+                return Load(config, stream, decoder);
+            }
+        }
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="config">The config for the decoder.</param>
+        /// <param name="data">The byte array containing image data.</param>
+        /// <param name="format">The mime type of the decoded image.</param>
+        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
+        public static Image Load(Configuration config, byte[] data, out IImageFormat format)
+        {
+            using (var stream = new MemoryStream(data))
+            {
+                return Load(config, stream, out format);
+            }
+        }
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image{Rgba32}"/> from the given encoded byte span.
+        /// </summary>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
+        public static Image Load(ReadOnlySpan<byte> data) => Load(Configuration.Default, data);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte span.
+        /// </summary>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <param name="decoder">The decoder.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static Image Load(ReadOnlySpan<byte> data, IImageDecoder decoder) =>
+            Load(Configuration.Default, data, decoder);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte array.
+        /// </summary>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <param name="format">The detected format.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static Image Load(ReadOnlySpan<byte> data, out IImageFormat format) =>
+            Load(Configuration.Default, data, out format);
+
+        /// <summary>
+        /// Decodes a new instance of <see cref="Image"/> from the given encoded byte span.
+        /// </summary>
+        /// <param name="config">The configuration options.</param>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static unsafe Image Load(Configuration config, ReadOnlySpan<byte> data) => Load(config, data, out _);
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte span.
+        /// </summary>
+        /// <param name="config">The Configuration.</param>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <param name="decoder">The decoder.</param>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static unsafe Image Load(
+            Configuration config,
+            ReadOnlySpan<byte> data,
+            IImageDecoder decoder)
+        {
+            fixed (byte* ptr = &data.GetPinnableReference())
+            {
+                using (var stream = new UnmanagedMemoryStream(ptr, data.Length))
+                {
+                    return Load(config, stream, decoder);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Load a new instance of <see cref="Image"/> from the given encoded byte span.
+        /// </summary>
+        /// <param name="config">The configuration options.</param>
+        /// <param name="data">The byte span containing image data.</param>
+        /// <param name="format">The <see cref="IImageFormat"/> of the decoded image.</param>>
+        /// <returns>A new <see cref="Image"/>.</returns>
+        public static unsafe Image Load(
+            Configuration config,
+            ReadOnlySpan<byte> data,
+            out IImageFormat format)
+        {
+            fixed (byte* ptr = &data.GetPinnableReference())
+            {
+                using (var stream = new UnmanagedMemoryStream(ptr, data.Length))
+                {
+                    return Load(config, stream, out format);
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image.FromFile.cs b/src/ImageSharp/Image.FromFile.cs
index 61500e20d7..08ed381c5a 100644
--- a/src/ImageSharp/Image.FromFile.cs
+++ b/src/ImageSharp/Image.FromFile.cs
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image Load(string path) => Load(path);
+        public static Image Load(string path) => Load(Configuration.Default, path);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image Load(string path, out IImageFormat format) => Load(path, out format);
+        public static Image Load(string path, out IImageFormat format) => Load(Configuration.Default, path, out format);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image Load(Configuration config, string path) => Load(config, path);
+        public static Image Load(Configuration config, string path) => Load(config, path, out _);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -80,7 +80,13 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image Load(Configuration config, string path, IImageDecoder decoder) => Load(config, path, decoder);
+        public static Image Load(Configuration config, string path, IImageDecoder decoder)
+        {
+            using (Stream stream = config.FileSystem.OpenRead(path))
+            {
+                return Load(config, stream, decoder);
+            }
+        }
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given file.
@@ -91,7 +97,7 @@ namespace SixLabors.ImageSharp
         /// Thrown if the stream is not readable nor seekable.
         /// </exception>
         /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>
-        public static Image Load(string path, IImageDecoder decoder) => Load(path, decoder);
+        public static Image Load(string path, IImageDecoder decoder) => Load(Configuration.Default, path, decoder);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given file.
diff --git a/src/ImageSharp/Image.FromStream.cs b/src/ImageSharp/Image.FromStream.cs
index a4a9eeec75..74b99dfb3f 100644
--- a/src/ImageSharp/Image.FromStream.cs
+++ b/src/ImageSharp/Image.FromStream.cs
@@ -56,39 +56,54 @@ namespace SixLabors.ImageSharp
             => WithSeekableStream(config, stream, s => InternalIdentity(s, config ?? Configuration.Default));
 
         /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
+        /// The pixel format is selected by the decoder.
         /// </summary>
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image Load(Stream stream, out IImageFormat format) => Load(stream, out format);
+        /// <returns>A new <see cref="Image"/>.</returns>>
+        public static Image Load(Stream stream, out IImageFormat format) => Load(Configuration.Default, stream, out format);
 
         /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
+        /// The pixel format is selected by the decoder.
         /// </summary>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image Load(Stream stream) => Load(stream);
+        /// <returns>A new <see cref="Image"/>.</returns>>
+        public static Image Load(Stream stream) => Load(Configuration.Default, stream);
 
         /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
+        /// The pixel format is selected by the decoder.
         /// </summary>
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image Load(Stream stream, IImageDecoder decoder) => Load(stream, decoder);
+        /// <returns>A new <see cref="Image"/>.</returns>>
+        public static Image Load(Stream stream, IImageDecoder decoder) => Load(Configuration.Default, stream, decoder);
 
         /// <summary>
-        /// Create a new instance of the <see cref="Image{Rgba32}"/> class from the given stream.
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
+        /// The pixel format is selected by the decoder.
+        /// </summary>
+        /// <param name="config">The config for the decoder.</param>
+        /// <param name="stream">The stream containing image information.</param>
+        /// <param name="decoder">The decoder.</param>
+        /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <returns>A new <see cref="Image"/>.</returns>>
+        public static Image Load(Configuration config, Stream stream, IImageDecoder decoder) =>
+            WithSeekableStream(config, stream, s => decoder.Decode(config, s));
+
+        /// <summary>
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
         /// </summary>
         /// <param name="config">The config for the decoder.</param>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
-        /// <returns>A new <see cref="Image{Rgba32}"/>.</returns>>
-        public static Image Load(Configuration config, Stream stream) => Load(config, stream);
+        /// <returns>A new <see cref="Image"/>.</returns>>
+        public static Image Load(Configuration config, Stream stream) => Load(config, stream, out _);
 
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given stream.
@@ -183,7 +198,16 @@ namespace SixLabors.ImageSharp
             throw new NotSupportedException(sb.ToString());
         }
 
-        private static Image Load(Configuration config, Stream stream, out IImageFormat format)
+        /// <summary>
+        /// Decode a new instance of the <see cref="Image"/> class from the given stream.
+        /// The pixel format is selected by the decoder.
+        /// </summary>
+        /// <param name="config">The configuration options.</param>
+        /// <param name="stream">The stream containing image information.</param>
+        /// <param name="format">the mime type of the decoded image.</param>
+        /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
+        public static Image Load(Configuration config, Stream stream, out IImageFormat format)
         {
             config = config ?? Configuration.Default;
             (Image img, IImageFormat format) data = WithSeekableStream(config, stream, s => Decode(s, config));
diff --git a/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs b/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
index 2dcd8b3d34..b064d9c964 100644
--- a/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Tests
 
             foreach (TestFile file in Files)
             {
-                using (Image<Rgba32> image = file.CreateImage())
+                using (Image<Rgba32> image = file.CreateRgba32Image())
                 {
                     image.Mutate(x => x.Fill(brush));
                     image.Save($"{path}/{file.FileName}");
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.Tests
 
             foreach (TestFile file in Files)
             {
-                using (Image<Rgba32> image = file.CreateImage())
+                using (Image<Rgba32> image = file.CreateRgba32Image())
                 {
                     int imageHeight = image.Height;
                     image.Mutate(x => x.Fill(brush, new Rectangle(0, imageHeight / 2 - imageHeight / 4, image.Width, imageHeight / 2)));
diff --git a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
index d7fb0a3d37..5660518eb4 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
@@ -96,7 +96,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                             new Vector2(50, 300)
             };
 
-            using (Image<Rgba32> brushImage = TestFile.Create(TestImages.Bmp.Car).CreateImage())
+            using (Image<Rgba32> brushImage = TestFile.Create(TestImages.Bmp.Car).CreateRgba32Image())
             using (var image = new Image<Rgba32>(500, 500))
             {
                 var brush = new ImageBrush<Rgba32>(brushImage);
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 7e054734e3..df3029a7fc 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             var options = new BmpEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -74,7 +74,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             var options = new BmpEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
diff --git a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
index e8fdbd8926..b2f9788ae4 100644
--- a/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
+++ b/tests/ImageSharp.Tests/Formats/GeneralFormatTests.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests
 
             foreach (TestFile file in Files)
             {
-                using (Image<Rgba32> image = file.CreateImage())
+                using (Image<Rgba32> image = file.CreateRgba32Image())
                 {
                     string filename = path + "/" + file.FileNameWithoutExtension + ".txt";
                     File.WriteAllText(filename, image.ToBase64String(PngFormat.Instance));
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.Tests
 
             foreach (TestFile file in Files)
             {
-                using (Image<Rgba32> image = file.CreateImage())
+                using (Image<Rgba32> image = file.CreateRgba32Image())
                 {
                     image.Save($"{path}/{file.FileName}");
                 }
@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp.Tests
 
             foreach (TestFile file in Files)
             {
-                using (Image<Rgba32> image = file.CreateImage())
+                using (Image<Rgba32> image = file.CreateRgba32Image())
                 {
                     using (FileStream output = File.OpenWrite($"{path}/{file.FileNameWithoutExtension}.bmp"))
                     {
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
index b13362aa3b..784f7ce703 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs
@@ -165,7 +165,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             var testFile = TestFile.Create(TestImages.Gif.Rings);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(1, image.Metadata.Properties.Count);
                 Assert.Equal("Comments", image.Metadata.Properties[0].Name);
@@ -183,7 +183,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             var testFile = TestFile.Create(TestImages.Gif.Rings);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(0, image.Metadata.Properties.Count);
             }
@@ -199,7 +199,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             var testFile = TestFile.Create(TestImages.Gif.Rings);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(1, image.Metadata.Properties.Count);
                 Assert.Equal("浉条卥慨灲", image.Metadata.Properties[0].Value);
diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
index 5da1c3bb78..eab30944e9 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifEncoderTests.cs
@@ -58,7 +58,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
             var options = new GifEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             var testFile = TestFile.Create(TestImages.Gif.Rings);
 
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -107,7 +107,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Gif
 
             var testFile = TestFile.Create(TestImages.Gif.Rings);
 
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 input.Metadata.Properties.Clear();
                 using (var memStream = new MemoryStream())
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
index 48acc9ea47..308cf28b35 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.MetaData.cs
@@ -216,7 +216,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             // Snake.jpg has both Exif and ICC profiles defined:
             var testFile = TestFile.Create(TestImages.Jpeg.Baseline.Snake);
 
-            using (Image<Rgba32> image = testFile.CreateImage(decoder))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(decoder))
             {
                 if (ignoreMetaData)
                 {
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
index 618947130a..d9013b507e 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             var options = new JpegEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -137,7 +137,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
 
             var testFile = TestFile.Create(TestImages.Jpeg.Baseline.Calliphora);
 
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             using (var memStream0 = new MemoryStream())
             using (var memStream1 = new MemoryStream())
             {
@@ -160,7 +160,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
 
             var testFile = TestFile.Create(TestImages.Jpeg.Baseline.Calliphora);
 
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             using (var memStream0 = new MemoryStream())
             using (var memStream1 = new MemoryStream())
             {
@@ -180,7 +180,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             var options = new JpegEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index 0dbccd2509..70d191d74e 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -202,7 +202,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             var testFile = TestFile.Create(TestImages.Png.Blur);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(1, image.Metadata.Properties.Count);
                 Assert.Equal("Software", image.Metadata.Properties[0].Name);
@@ -220,7 +220,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             var testFile = TestFile.Create(TestImages.Png.Blur);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(0, image.Metadata.Properties.Count);
             }
@@ -236,7 +236,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
 
             var testFile = TestFile.Create(TestImages.Png.Blur);
 
-            using (Image<Rgba32> image = testFile.CreateImage(options))
+            using (Image<Rgba32> image = testFile.CreateRgba32Image(options))
             {
                 Assert.Equal(1, image.Metadata.Properties.Count);
                 Assert.Equal("潓瑦慷敲", image.Metadata.Properties[0].Name);
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
index 5aa69dd6af..b8178fd4f3 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngEncoderTests.cs
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             var options = new PngEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -244,7 +244,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             var options = new PngEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 using (var memStream = new MemoryStream())
                 {
@@ -268,7 +268,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             var options = new PngEncoder();
 
             var testFile = TestFile.Create(imagePath);
-            using (Image<Rgba32> input = testFile.CreateImage())
+            using (Image<Rgba32> input = testFile.CreateRgba32Image())
             {
                 PngMetadata inMeta = input.Metadata.GetFormatMetadata(PngFormat.Instance);
                 Assert.True(inMeta.HasTrans);
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.ImageLoadTestBase.cs b/tests/ImageSharp.Tests/Image/ImageTests.ImageLoadTestBase.cs
index aabc3f50e5..ec6705d0ec 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.ImageLoadTestBase.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.ImageLoadTestBase.cs
@@ -16,7 +16,9 @@ namespace SixLabors.ImageSharp.Tests
     {
         public abstract class ImageLoadTestBase : IDisposable
         {
-            protected Image<Rgba32> returnImage;
+            protected Image<Rgba32> localStreamReturnImageRgba32;
+            
+            protected Image<Bgra4444> localStreamReturnImageAgnostic;
 
             protected Mock<IImageDecoder> localDecoder;
 
@@ -48,12 +50,14 @@ namespace SixLabors.ImageSharp.Tests
 
             protected ImageLoadTestBase()
             {
-                this.returnImage = new Image<Rgba32>(1, 1);
+                this.localStreamReturnImageRgba32 = new Image<Rgba32>(1, 1);
+                this.localStreamReturnImageAgnostic = new Image<Bgra4444>(1, 1);
 
                 this.localImageFormatMock = new Mock<IImageFormat>();
 
                 this.localDecoder = new Mock<IImageDecoder>();
                 this.localMimeTypeDetector = new MockImageFormatDetector(this.localImageFormatMock.Object);
+                
                 this.localDecoder.Setup(x => x.Decode<Rgba32>(It.IsAny<Configuration>(), It.IsAny<Stream>()))
                     .Callback<Configuration, Stream>((c, s) =>
                         {
@@ -63,7 +67,19 @@ namespace SixLabors.ImageSharp.Tests
                                 this.DecodedData = ms.ToArray();
                             }
                         })
-                    .Returns(this.returnImage);
+                    .Returns(this.localStreamReturnImageRgba32);
+                
+                this.localDecoder.Setup(x => x.Decode(It.IsAny<Configuration>(), It.IsAny<Stream>()))
+                    .Callback<Configuration, Stream>((c, s) =>
+                        {
+                            using (var ms = new MemoryStream())
+                            {
+                                s.CopyTo(ms);
+                                this.DecodedData = ms.ToArray();
+                            }
+                        })
+                    .Returns(this.localStreamReturnImageAgnostic);
+                
 
                 this.LocalConfiguration = new Configuration
                                               {
@@ -85,7 +101,8 @@ namespace SixLabors.ImageSharp.Tests
             public void Dispose()
             {
                 // clean up the global object;
-                this.returnImage?.Dispose();
+                this.localStreamReturnImageRgba32?.Dispose();
+                this.localStreamReturnImageAgnostic?.Dispose();
             }
         }
     }
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
index 1a21d3d105..d6fe43897c 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Tests
 
                 Assert.NotNull(img);
 
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
+                this.TestFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
             }
 
             [Fact]
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes.cs
deleted file mode 100644
index eed1a28252..0000000000
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes.cs
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.IO;
-
-using Moq;
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
-
-using Xunit;
-
-// ReSharper disable InconsistentNaming
-namespace SixLabors.ImageSharp.Tests
-{
-    public partial class ImageTests
-    {
-        public class Load_FromBytes : ImageLoadTestBase
-        {
-            private byte[] ByteArray => this.DataStream.ToArray();
-
-            private ReadOnlySpan<byte> ByteSpan => this.ByteArray.AsSpan();
-
-            private byte[] ActualImageBytes => TestFile.Create(TestImages.Bmp.F).Bytes;
-
-            private ReadOnlySpan<byte> ActualImageSpan => this.ActualImageBytes.AsSpan();
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void BasicCase(bool useSpan)
-            {
-                Image<Rgba32> img = useSpan
-                                        ? Image.Load(this.TopLevelConfiguration, this.ByteSpan)
-                                        : Image.Load(this.TopLevelConfiguration, this.ByteArray);
-
-                Assert.NotNull(img);
-                Assert.Equal(this.TestFormat.Sample<Rgba32>(), img);
-
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void NonDefaultPixelType(bool useSpan)
-            {
-                Image<Rgb24> img = useSpan
-                                       ? Image.Load<Rgb24>(this.TopLevelConfiguration, this.ByteSpan)
-                                       : Image.Load<Rgb24>(this.TopLevelConfiguration, this.ByteArray);
-
-                Assert.NotNull(img);
-                Assert.Equal(this.TestFormat.Sample<Rgb24>(), img);
-
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void UseLocalConfiguration(bool useSpan)
-            {
-                Image<Rgba32> img = useSpan
-                                        ? Image.Load<Rgba32>(this.LocalConfiguration, this.ByteSpan)
-                                        : Image.Load<Rgba32>(this.LocalConfiguration, this.ByteArray);
-
-                Assert.NotNull(img);
-
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.LocalConfiguration, It.IsAny<Stream>()));
-
-                Assert.Equal(this.DataStream.ToArray(), this.DecodedData);
-            }
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void UseCustomDecoder(bool useSpan)
-            {
-                Image<Rgba32> img = useSpan
-                                        ? Image.Load<Rgba32>(
-                                            this.TopLevelConfiguration,
-                                            this.ByteSpan,
-                                            this.localDecoder.Object)
-                                        : Image.Load<Rgba32>(
-                                            this.TopLevelConfiguration,
-                                            this.ByteArray,
-                                            this.localDecoder.Object);
-                Assert.NotNull(img);
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.TopLevelConfiguration, It.IsAny<Stream>()));
-                Assert.Equal(this.DataStream.ToArray(), this.DecodedData);
-            }
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void UseGlobalConfiguration(bool useSpan)
-            {
-                using (Image<Rgba32> img =
-                    useSpan ? Image.Load(this.ActualImageSpan) : Image.Load(this.ActualImageBytes))
-                {
-                    Assert.Equal(new Size(108, 202), img.Size());
-                }
-            }
-
-            [Theory]
-            [InlineData(false)]
-            [InlineData(true)]
-            public void UseGlobalConfiguration_NonDefaultPixelType(bool useSpan)
-            {
-                using (Image<Rgb24> img = useSpan
-                                              ? Image.Load<Rgb24>(this.ActualImageSpan)
-                                              : Image.Load<Rgb24>(this.ActualImageBytes))
-                {
-                    Assert.Equal(new Size(108, 202), img.Size());
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_PassLocalConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_PassLocalConfiguration.cs
new file mode 100644
index 0000000000..5fe87fedca
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_PassLocalConfiguration.cs
@@ -0,0 +1,119 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FromBytes_PassLocalConfiguration : ImageLoadTestBase
+        {
+            private byte[] ByteArray => this.DataStream.ToArray();
+
+            private ReadOnlySpan<byte> ByteSpan => this.ByteArray.AsSpan();
+
+            private byte[] ActualImageBytes => TestFile.Create(TestImages.Bmp.F).Bytes;
+
+            private ReadOnlySpan<byte> ActualImageSpan => this.ActualImageBytes.AsSpan();
+
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_Specific(bool useSpan)
+            {
+                var img = useSpan
+                              ? Image.Load<Rgb24>(this.TopLevelConfiguration, this.ByteSpan)
+                              : Image.Load<Rgb24>(this.TopLevelConfiguration, this.ByteArray);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.Sample<Rgb24>(), img);
+
+                this.TestFormat.VerifySpecificDecodeCall<Rgb24>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_Agnostic(bool useSpan)
+            {
+                var img = useSpan
+                              ? Image.Load(this.TopLevelConfiguration, this.ByteSpan)
+                              : Image.Load(this.TopLevelConfiguration, this.ByteArray);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.SampleAgnostic(), img);
+
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_Decoder_Specific(bool useSpan)
+            {
+                TestFormat localFormat = new TestFormat();
+                
+                var img = useSpan ?
+                              Image.Load<Rgba32>(this.TopLevelConfiguration, this.ByteSpan, localFormat.Decoder) :
+                              Image.Load<Rgba32>(this.TopLevelConfiguration, this.ByteArray, localFormat.Decoder);
+
+                Assert.NotNull(img);
+                localFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_Decoder_Agnostic(bool useSpan)
+            {
+                TestFormat localFormat = new TestFormat();
+                
+                var img = useSpan ?
+                              Image.Load(this.TopLevelConfiguration, this.ByteSpan, localFormat.Decoder) :
+                              Image.Load(this.TopLevelConfiguration, this.ByteArray, localFormat.Decoder);
+
+                Assert.NotNull(img);
+                localFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }
+
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_OutFormat_Specific(bool useSpan)
+            {
+                IImageFormat format;
+                var img = useSpan ?
+                              Image.Load<Bgr24>(this.TopLevelConfiguration, this.ByteSpan, out format) :
+                              Image.Load<Bgr24>(this.TopLevelConfiguration, this.ByteArray, out format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifySpecificDecodeCall<Bgr24>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Configuration_Bytes_OutFormat_Agnostic(bool useSpan)
+            {
+                IImageFormat format;
+                var img = useSpan ?
+                              Image.Load(this.TopLevelConfiguration, this.ByteSpan, out format) :
+                              Image.Load(this.TopLevelConfiguration, this.ByteArray, out format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
new file mode 100644
index 0000000000..23c25d9dbb
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
@@ -0,0 +1,101 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.IO;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FromBytes_UseGlobalConfiguration
+        {
+            private static byte[] ByteArray { get; } = TestFile.Create(TestImages.Bmp.F).Bytes;
+            
+            private static Span<byte> ByteSpan => new Span<byte>(ByteArray);
+
+            private static void VerifyDecodedImage(Image img)
+            {
+                Assert.Equal(new Size(108, 202), img.Size());
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_Specific(bool useSpan)
+            {
+                using (var img = useSpan ? Image.Load<Rgba32>(ByteSpan) : Image.Load<Rgba32>(ByteArray))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_Agnostic(bool useSpan)
+            {
+                using (var img = useSpan ? Image.Load(ByteSpan) : Image.Load(ByteArray))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+
+
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_Decoder_Specific(bool useSpan)
+            {
+                using (var img = useSpan ? Image.Load<Rgba32>(ByteSpan, new BmpDecoder()) : Image.Load<Rgba32>(ByteArray, new BmpDecoder()))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_Decoder_Agnostic(bool useSpan)
+            {
+                using (var img = useSpan ? Image.Load(ByteSpan, new BmpDecoder()) : Image.Load(ByteArray, new BmpDecoder()))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_OutFormat_Specific(bool useSpan)
+            {
+                IImageFormat format;
+                using (var img = useSpan ? Image.Load<Rgba32>(ByteSpan, out format) : Image.Load<Rgba32>(ByteArray, out format))
+                {
+                    VerifyDecodedImage(img);
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+            
+            [Theory]
+            [InlineData(false)]
+            [InlineData(true)]
+            public void Bytes_OutFormat_Agnostic(bool useSpan)
+            {
+                IImageFormat format;
+                using (var img = useSpan ? Image.Load(ByteSpan, out format) : Image.Load(ByteArray, out format))
+                {
+                    VerifyDecodedImage(img);
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream.cs
deleted file mode 100644
index 6b6acb1b80..0000000000
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream.cs
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.IO;
-
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.PixelFormats;
-
-using Xunit;
-// ReSharper disable InconsistentNaming
-
-namespace SixLabors.ImageSharp.Tests
-{
-    using SixLabors.Primitives;
-
-    public partial class ImageTests
-    {
-        /// <summary>
-        /// Tests the <see cref="Image"/> class.
-        /// </summary>
-        public class Load_FromStream : ImageLoadTestBase
-        {
-            [Fact]
-            public void BasicCase()
-            {
-                var img = Image.Load(this.TopLevelConfiguration, this.DataStream);
-
-                Assert.NotNull(img);
-                Assert.Equal(this.TestFormat.Sample<Rgba32>(), img);
-
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Fact]
-            public void UseGlobalConfiguration()
-            {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load(stream))
-                {
-                    Assert.Equal(new Size(108, 202), img.Size());
-                }
-            }
-
-            [Fact]
-            public void NonDefaultPixelTypeImage()
-            {
-                var img = Image.Load<Rgb24>(this.TopLevelConfiguration, this.DataStream);
-
-                Assert.NotNull(img);
-                Assert.Equal(this.TestFormat.Sample<Rgb24>(), img);
-
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Fact]
-            public void NonSeekableStream()
-            {
-                var stream = new NoneSeekableStream(this.DataStream);
-                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, stream);
-
-                Assert.NotNull(img);
-
-                this.TestFormat.VerifyDecodeCall(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Fact]
-            public void UseLocalConfiguration()
-            {
-                Stream stream = new MemoryStream();
-                var img = Image.Load<Rgba32>(this.LocalConfiguration, stream);
-
-                Assert.NotNull(img);
-
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.LocalConfiguration, stream));
-            }
-            
-            [Fact]
-            public void UseCustomDecoder()
-            {
-                Stream stream = new MemoryStream();
-                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, stream, this.localDecoder.Object);
-
-                Assert.NotNull(img);
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.TopLevelConfiguration, stream));
-            }
-
-            // TODO: This should be a png decoder test!
-            [Fact]
-            public void LoadsImageWithoutThrowingCrcException()
-            {
-                var image1Provider = TestImageProvider<Rgba32>.File(TestImages.Png.VersioningImage1);
-
-                using (Image<Rgba32> img = image1Provider.GetImage())
-                {
-                    Assert.Equal(166036, img.Frames.RootFrame.GetPixelSpan().Length);
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_PassLocalConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_PassLocalConfiguration.cs
new file mode 100644
index 0000000000..5ca86c3cee
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_PassLocalConfiguration.cs
@@ -0,0 +1,93 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FromStream_PassLocalConfiguration : ImageLoadTestBase
+        {
+            [Fact]
+            public void Configuration_Stream_Specific()
+            {
+                var img = Image.Load<Rgb24>(this.TopLevelConfiguration, this.DataStream);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.Sample<Rgb24>(), img);
+
+                this.TestFormat.VerifySpecificDecodeCall<Rgb24>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Stream_Agnostic()
+            {
+                var img = Image.Load(this.TopLevelConfiguration, this.DataStream);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.SampleAgnostic(), img);
+
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void NonSeekableStream()
+            {
+                var stream = new NoneSeekableStream(this.DataStream);
+                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, stream);
+
+                Assert.NotNull(img);
+
+                this.TestFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Stream_Decoder_Specific()
+            {
+                Stream stream = new MemoryStream();
+                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, stream, this.localDecoder.Object);
+
+                Assert.NotNull(img);
+                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.TopLevelConfiguration, stream));
+            }
+            
+            [Fact]
+            public void Configuration_Stream_Decoder_Agnostic()
+            {
+                Stream stream = new MemoryStream();
+                var img = Image.Load(this.TopLevelConfiguration, stream, this.localDecoder.Object);
+
+                Assert.NotNull(img);
+                this.localDecoder.Verify(x => x.Decode(this.TopLevelConfiguration, stream));
+            }
+
+            [Fact]
+            public void Configuration_Stream_OutFormat_Specific()
+            {
+                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, this.DataStream, out IImageFormat format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Stream_OutFormat_Agnostic()
+            {
+                var img = Image.Load(this.TopLevelConfiguration, this.DataStream, out IImageFormat format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }   
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs
new file mode 100644
index 0000000000..27aba42ead
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs
@@ -0,0 +1,95 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FromStream_UseDefaultConfiguration
+        {
+            [Fact]
+            public void Stream_Specific()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load<Rgba32>(stream))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                }
+            }
+            
+            [Fact]
+            public void Stream_Agnostic()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load(stream))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                }
+            }
+            
+            [Fact]
+            public void Stream_OutFormat_Specific()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load<Rgba32>(stream, out IImageFormat format))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+            
+            [Fact]
+            public void Stream_Decoder_Specific()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load<Rgba32>(stream, new BmpDecoder()))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                }
+            }
+            
+            [Fact]
+            public void Stream_Decoder_Agnostic()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load(stream, new BmpDecoder()))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                }
+            }
+            
+            [Fact]
+            public void Stream_OutFormat_Agnostic()
+            {
+                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
+
+                using (var stream = new MemoryStream(data))
+                using (var img = Image.Load(stream, out IImageFormat format))
+                {
+                    Assert.Equal(new Size(108, 202), img.Size());
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
index 9d145f3805..668e699c5f 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifProfileTests.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Tests
         [InlineData(TestImageWriteFormat.Png)]
         public void Constructor(TestImageWriteFormat imageFormat)
         {
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Calliphora).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Calliphora).CreateRgba32Image();
 
             Assert.Null(image.Metadata.ExifProfile);
 
@@ -126,7 +126,7 @@ namespace SixLabors.ImageSharp.Tests
         [InlineData(TestImageWriteFormat.Png)]
         public void ReadWriteInfinity(TestImageWriteFormat imageFormat)
         {
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateRgba32Image();
             image.Metadata.ExifProfile.SetValue(ExifTag.ExposureBiasValue, new SignedRational(double.PositiveInfinity));
 
             image = WriteAndReadJpeg(image);
@@ -156,7 +156,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             var latitude = new Rational[] { new Rational(12.3), new Rational(4.56), new Rational(789.0) };
 
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateRgba32Image();
             image.Metadata.ExifProfile.SetValue(ExifTag.Software, "ImageSharp");
 
             ExifValue value = image.Metadata.ExifProfile.GetValue(ExifTag.Software);
@@ -314,7 +314,7 @@ namespace SixLabors.ImageSharp.Tests
             // This image contains an 802 byte EXIF profile
             // It has a tag with an index offset of 18,481,152 bytes (overrunning the data)
 
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Progressive.Bad.ExifUndefType).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Progressive.Bad.ExifUndefType).CreateRgba32Image();
             Assert.NotNull(image);
 
             ExifProfile profile = image.Metadata.ExifProfile;
@@ -333,7 +333,7 @@ namespace SixLabors.ImageSharp.Tests
         public void TestArrayValueWithUnspecifiedSize()
         {
             // This images contains array in the exif profile that has zero components.
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Issues.InvalidCast520).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Issues.InvalidCast520).CreateRgba32Image();
 
             ExifProfile profile = image.Metadata.ExifProfile;
             Assert.NotNull(profile);
@@ -408,7 +408,7 @@ namespace SixLabors.ImageSharp.Tests
 
         internal static ExifProfile GetExifProfile()
         {
-            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage();
+            Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateRgba32Image();
 
             ExifProfile profile = image.Metadata.ExifProfile;
             Assert.NotNull(profile);
diff --git a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
index 4327cae335..8d786811cf 100644
--- a/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
+++ b/tests/ImageSharp.Tests/MetaData/Profiles/Exif/ExifValueTests.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Tests
         private static ExifValue GetExifValue()
         {
             ExifProfile profile;
-            using (Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateImage())
+            using (Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateRgba32Image())
             {
                 profile = image.Metadata.ExifProfile;
             }
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffCompositorTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffCompositorTests.cs
index 9c3ea90d53..0c7a760818 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffCompositorTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffCompositorTests.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelBlenders
         public void PorterDuffOutputIsCorrect(TestImageProvider<Rgba32> provider, PixelAlphaCompositionMode mode)
         {
             var srcFile = TestFile.Create(TestImages.Png.PDSrc);
-            using (Image<Rgba32> src = srcFile.CreateImage())
+            using (Image<Rgba32> src = srcFile.CreateRgba32Image())
             using (Image<Rgba32> dest = provider.GetImage())
             {
                 GraphicsOptions options = new GraphicsOptions
diff --git a/tests/ImageSharp.Tests/TestFile.cs b/tests/ImageSharp.Tests/TestFile.cs
index 089249e217..6ca86ced6e 100644
--- a/tests/ImageSharp.Tests/TestFile.cs
+++ b/tests/ImageSharp.Tests/TestFile.cs
@@ -134,7 +134,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <returns>
         /// The <see cref="ImageSharp.Image"/>.
         /// </returns>
-        public Image<Rgba32> CreateImage()
+        public Image<Rgba32> CreateRgba32Image()
         {
             return this.Image.Clone();
         }
@@ -145,9 +145,9 @@ namespace SixLabors.ImageSharp.Tests
         /// <returns>
         /// The <see cref="ImageSharp.Image"/>.
         /// </returns>
-        public Image<Rgba32> CreateImage(IImageDecoder decoder)
+        public Image<Rgba32> CreateRgba32Image(IImageDecoder decoder)
         {
-            return ImageSharp.Image.Load(this.Image.GetConfiguration(), this.Bytes, decoder);
+            return ImageSharp.Image.Load<Rgba32>(this.Image.GetConfiguration(), this.Bytes, decoder);
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/TestFileSystem.cs b/tests/ImageSharp.Tests/TestFileSystem.cs
index 21ad4d2c1a..9211e70f79 100644
--- a/tests/ImageSharp.Tests/TestFileSystem.cs
+++ b/tests/ImageSharp.Tests/TestFileSystem.cs
@@ -12,29 +12,24 @@ namespace SixLabors.ImageSharp.Tests
     /// </summary>
     public class TestFileSystem : ImageSharp.IO.IFileSystem
     {
-
-        public static TestFileSystem Global { get; } = new TestFileSystem();
-
-        public static void RegisterGlobalTestFormat()
-        {
-            Configuration.Default.FileSystem = Global;
-        }
-
-        Dictionary<string, Stream> fileSystem = new Dictionary<string, Stream>(StringComparer.OrdinalIgnoreCase);
+        private readonly Dictionary<string, Stream> fileSystem = new Dictionary<string, Stream>(StringComparer.OrdinalIgnoreCase);
 
         public void AddFile(string path, Stream data)
         {
-            fileSystem.Add(path, data);
+            lock (this.fileSystem)
+            {
+                this.fileSystem.Add(path, data);
+            }
         }
 
         public Stream Create(string path)
         {
             // if we have injected a fake file use it instead
-            lock (fileSystem)
+            lock (this.fileSystem)
             {
-                if (fileSystem.ContainsKey(path))
+                if (this.fileSystem.ContainsKey(path))
                 {
-                    Stream stream = fileSystem[path];
+                    Stream stream = this.fileSystem[path];
                     stream.Position = 0;
                     return stream;
                 }
@@ -43,15 +38,14 @@ namespace SixLabors.ImageSharp.Tests
             return File.Create(path);
         }
 
-
         public Stream OpenRead(string path)
         {
             // if we have injected a fake file use it instead
-            lock (fileSystem)
+            lock (this.fileSystem)
             {
-                if (fileSystem.ContainsKey(path))
+                if (this.fileSystem.ContainsKey(path))
                 {
-                    Stream stream = fileSystem[path];
+                    Stream stream = this.fileSystem[path];
                     stream.Position = 0;
                     return stream;
                 }
@@ -60,5 +54,4 @@ namespace SixLabors.ImageSharp.Tests
             return File.OpenRead(path);
         }
     }
-}
-
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestFormat.cs b/tests/ImageSharp.Tests/TestFormat.cs
index 91e31b356e..23bd0a54c3 100644
--- a/tests/ImageSharp.Tests/TestFormat.cs
+++ b/tests/ImageSharp.Tests/TestFormat.cs
@@ -6,6 +6,7 @@ using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Numerics;
 using System.Reflection;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.PixelFormats;
@@ -18,6 +19,8 @@ namespace SixLabors.ImageSharp.Tests
     /// </summary>
     public class TestFormat : IConfigurationModule, IImageFormat
     {
+        private readonly Dictionary<Type, object> sampleImages = new Dictionary<Type, object>();
+        
         // We should not change Configuration.Default in individual tests!
         // Create new configuration instances with new Configuration(TestFormat.GlobalTestFormat) instead!
         public static TestFormat GlobalTestFormat { get; } = new TestFormat();
@@ -49,12 +52,23 @@ namespace SixLabors.ImageSharp.Tests
             return ms;
         }
 
-        Dictionary<Type, object> _sampleImages = new Dictionary<Type, object>();
+        public void VerifySpecificDecodeCall<TPixel>(byte[] marker, Configuration config)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            DecodeOperation[] discovered = this.DecodeCalls.Where(x => x.IsMatch(marker, config, typeof(TPixel))).ToArray();
 
 
-        public void VerifyDecodeCall(byte[] marker, Configuration config)
+            Assert.True(discovered.Any(), "No calls to decode on this formate with the proveded options happend");
+
+            foreach (DecodeOperation d in discovered)
+            {
+                this.DecodeCalls.Remove(d);
+            }
+        }
+        
+        public void VerifyAgnosticDecodeCall(byte[] marker, Configuration config)
         {
-            DecodeOperation[] discovered = this.DecodeCalls.Where(x => x.IsMatch(marker, config)).ToArray();
+            DecodeOperation[] discovered = this.DecodeCalls.Where(x => x.IsMatch(marker, config, typeof(TestPixelForAgnosticDecode))).ToArray();
 
 
             Assert.True(discovered.Any(), "No calls to decode on this formate with the proveded options happend");
@@ -68,17 +82,19 @@ namespace SixLabors.ImageSharp.Tests
         public Image<TPixel> Sample<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
-            lock (this._sampleImages)
+            lock (this.sampleImages)
             {
-                if (!this._sampleImages.ContainsKey(typeof(TPixel)))
+                if (!this.sampleImages.ContainsKey(typeof(TPixel)))
                 {
-                    this._sampleImages.Add(typeof(TPixel), new Image<TPixel>(1, 1));
+                    this.sampleImages.Add(typeof(TPixel), new Image<TPixel>(1, 1));
                 }
 
-                return (Image<TPixel>)this._sampleImages[typeof(TPixel)];
+                return (Image<TPixel>)this.sampleImages[typeof(TPixel)];
             }
         }
 
+        public Image SampleAgnostic() => this.Sample<TestPixelForAgnosticDecode>();
+
         public string MimeType => "img/test";
 
         public string Extension => "test_ext";
@@ -123,10 +139,12 @@ namespace SixLabors.ImageSharp.Tests
             public byte[] marker;
             internal Configuration config;
 
-            public bool IsMatch(byte[] testMarker, Configuration config)
+            public Type pixelType; 
+
+            public bool IsMatch(byte[] testMarker, Configuration config, Type pixelType)
             {
 
-                if (this.config != config)
+                if (this.config != config || this.pixelType != pixelType)
                 {
                     return false;
                 }
@@ -191,7 +209,8 @@ namespace SixLabors.ImageSharp.Tests
                 this.testFormat.DecodeCalls.Add(new DecodeOperation
                 {
                     marker = marker,
-                    config = config
+                    config = config,
+                    pixelType = typeof(TPixel)
                 });
 
                 // TODO record this happend so we can verify it.
@@ -200,7 +219,7 @@ namespace SixLabors.ImageSharp.Tests
 
             public bool IsSupportedFileFormat(Span<byte> header) => testFormat.IsSupportedFileFormat(header);
             
-            public Image Decode(Configuration configuration, Stream stream) => this.Decode<Rgba32>(configuration, stream);
+            public Image Decode(Configuration configuration, Stream stream) => this.Decode<TestPixelForAgnosticDecode>(configuration, stream);
         }
 
         public class TestEncoder : ImageSharp.Formats.IImageEncoder
@@ -221,5 +240,27 @@ namespace SixLabors.ImageSharp.Tests
                 // TODO record this happend so we can verify it.
             }
         }
+        
+        
+        struct TestPixelForAgnosticDecode : IPixel<TestPixelForAgnosticDecode>
+        {
+            public PixelOperations<TestPixelForAgnosticDecode> CreatePixelOperations() => new PixelOperations<TestPixelForAgnosticDecode>();
+            public void FromScaledVector4(Vector4 vector) { }
+            public Vector4 ToScaledVector4() => default;
+            public void FromVector4(Vector4 vector) { }
+            public Vector4 ToVector4() => default;
+            public void FromArgb32(Argb32 source) { }
+            public void FromBgra5551(Bgra5551 source) { }
+            public void FromBgr24(Bgr24 source) { }
+            public void FromBgra32(Bgra32 source) { }
+            public void FromGray8(Gray8 source) { }
+            public void FromGray16(Gray16 source) { }
+            public void FromRgb24(Rgb24 source) { }
+            public void FromRgba32(Rgba32 source) { }
+            public void ToRgba32(ref Rgba32 dest) { }
+            public void FromRgb48(Rgb48 source) { }
+            public void FromRgba64(Rgba64 source) { }
+            public bool Equals(TestPixelForAgnosticDecode other) => false;
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/TestUtilities/Tests/ReferenceDecoderBenchmarks.cs b/tests/ImageSharp.Tests/TestUtilities/Tests/ReferenceDecoderBenchmarks.cs
index 033f0866a3..15213d5d32 100644
--- a/tests/ImageSharp.Tests/TestUtilities/Tests/ReferenceDecoderBenchmarks.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/Tests/ReferenceDecoderBenchmarks.cs
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.Tests.TestUtilities.Tests
                     {
                         foreach (string testFile in testFiles)
                         {
-                            Image<Rgba32> image = TestFile.Create(testFile).CreateImage(decoder);
+                            Image<Rgba32> image = TestFile.Create(testFile).CreateRgba32Image(decoder);
                             image.Dispose();
                         }
                     },

From 35640879f22c362f32d6a8e24a26cb09f5b6709b Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 21:19:35 +0200
Subject: [PATCH 135/223] full coverage for Image.Load (I hope)

---
 .../Image/ImageTests.Load_FileSystemPath.cs   |  83 --------------
 ...d_FileSystemPath_PassLocalConfiguration.cs | 100 +++++++++++++++++
 ..._FileSystemPath_UseDefaultConfiguration.cs | 103 ++++++++++++++++++
 ...s.Load_FromBytes_UseGlobalConfiguration.cs |   4 +-
 ...Load_FromStream_UseDefaultConfiguration.cs |  60 +++++-----
 .../ImageSharp.Tests/ImageSharp.Tests.csproj  |   3 +-
 6 files changed, 234 insertions(+), 119 deletions(-)
 delete mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_PassLocalConfiguration.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_UseDefaultConfiguration.cs

diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
deleted file mode 100644
index d6fe43897c..0000000000
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath.cs
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.PixelFormats;
-using Xunit;
-// ReSharper disable InconsistentNaming
-
-namespace SixLabors.ImageSharp.Tests
-{
-    using Moq;
-
-    using SixLabors.ImageSharp.IO;
-
-    public partial class ImageTests
-    {
-        public class Load_FileSystemPath : ImageLoadTestBase
-        {
-            [Fact]
-            public void BasicCase()
-            {
-                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, this.MockFilePath);
-
-                Assert.NotNull(img);
-
-                this.TestFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
-            }
-
-            [Fact]
-            public void UseLocalConfiguration()
-            {
-                var img = Image.Load<Rgba32>(this.LocalConfiguration, this.MockFilePath);
-
-                Assert.NotNull(img);
-
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.LocalConfiguration, this.DataStream));
-            }
-
-            [Fact]
-            public void UseCustomDecoder()
-            {
-                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, this.MockFilePath, this.localDecoder.Object);
-
-                Assert.NotNull(img);
-                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.TopLevelConfiguration, this.DataStream));
-            }
-
-
-            [Fact]
-            public void UseGlobalConfigration()
-            {
-                var file = TestFile.Create(TestImages.Bmp.Car);
-                using (var image = Image.Load<Rgba32>(file.FullPath))
-                {
-                    Assert.Equal(600, image.Width);
-                    Assert.Equal(450, image.Height);
-                }
-            }
-
-            [Fact]
-            public void WhenFileNotFound_Throws()
-            {
-                System.IO.FileNotFoundException ex = Assert.Throws<System.IO.FileNotFoundException>(
-                    () =>
-                    {
-                        Image.Load<Rgba32>(Guid.NewGuid().ToString());
-                    });
-            }
-
-            [Fact]
-            public void WhenPathIsNull_Throws()
-            {
-                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
-                    () =>
-                    {
-                        Image.Load<Rgba32>((string)null);
-                    });
-            }
-        }
-
-        
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_PassLocalConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_PassLocalConfiguration.cs
new file mode 100644
index 0000000000..92159f0c9a
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_PassLocalConfiguration.cs
@@ -0,0 +1,100 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FileSystemPath_PassLocalConfiguration : ImageLoadTestBase
+        {
+            [Fact]
+            public void Configuration_Path_Specific()
+            {
+                var img = Image.Load<Rgb24>(this.TopLevelConfiguration, this.MockFilePath);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.Sample<Rgb24>(), img);
+
+                this.TestFormat.VerifySpecificDecodeCall<Rgb24>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Path_Agnostic()
+            {
+                var img = Image.Load(this.TopLevelConfiguration, this.MockFilePath);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat.SampleAgnostic(), img);
+
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Path_Decoder_Specific()
+            {
+                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, this.MockFilePath, this.localDecoder.Object);
+
+                Assert.NotNull(img);
+                this.localDecoder.Verify(x => x.Decode<Rgba32>(this.TopLevelConfiguration, this.DataStream));
+            }
+            
+            [Fact]
+            public void Configuration_Path_Decoder_Agnostic()
+            {
+                var img = Image.Load(this.TopLevelConfiguration, this.MockFilePath, this.localDecoder.Object);
+
+                Assert.NotNull(img);
+                this.localDecoder.Verify(x => x.Decode(this.TopLevelConfiguration, this.DataStream));
+            }
+
+            [Fact]
+            public void Configuration_Path_OutFormat_Specific()
+            {
+                var img = Image.Load<Rgba32>(this.TopLevelConfiguration, this.MockFilePath, out IImageFormat format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifySpecificDecodeCall<Rgba32>(this.Marker, this.TopLevelConfiguration);
+            }
+            
+            [Fact]
+            public void Configuration_Path_OutFormat_Agnostic()
+            {
+                var img = Image.Load(this.TopLevelConfiguration, this.MockFilePath, out IImageFormat format);
+
+                Assert.NotNull(img);
+                Assert.Equal(this.TestFormat, format);
+                
+                this.TestFormat.VerifyAgnosticDecodeCall(this.Marker, this.TopLevelConfiguration);
+            }   
+            
+            [Fact]
+            public void WhenFileNotFound_Throws()
+            {
+                System.IO.FileNotFoundException ex = Assert.Throws<System.IO.FileNotFoundException>(
+                    () =>
+                        {
+                            Image.Load<Rgba32>(this.TopLevelConfiguration, Guid.NewGuid().ToString());
+                        });
+            }
+
+            [Fact]
+            public void WhenPathIsNull_Throws()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                        {
+                            Image.Load<Rgba32>(this.TopLevelConfiguration,(string)null);
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_UseDefaultConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_UseDefaultConfiguration.cs
new file mode 100644
index 0000000000..19cf7ee647
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FileSystemPath_UseDefaultConfiguration.cs
@@ -0,0 +1,103 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FileSystemPath_UseDefaultConfiguration
+        {
+            private string Path { get; } = TestFile.GetInputFileFullPath(TestImages.Bmp.Bit8);
+            
+            private static void VerifyDecodedImage(Image img)
+            {
+                Assert.Equal(new Size(127, 64), img.Size());
+            }
+            
+            [Fact]
+            public void Path_Specific()
+            {
+                using (var img = Image.Load<Rgba32>(this.Path))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+            
+            [Fact]
+            public void Path_Agnostic()
+            {
+                using (var img = Image.Load(this.Path))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+            
+            
+            [Fact]
+            public void Path_Decoder_Specific()
+            {
+                using (var img = Image.Load<Rgba32>(this.Path, new BmpDecoder()))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+            
+            [Fact]
+            public void Path_Decoder_Agnostic()
+            {
+                using (var img = Image.Load(this.Path, new BmpDecoder()))
+                {
+                    VerifyDecodedImage(img);
+                }
+            }
+            
+            [Fact]
+            public void Path_OutFormat_Specific()
+            {
+                using (var img = Image.Load<Rgba32>(this.Path, out IImageFormat format))
+                {
+                    VerifyDecodedImage(img);
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+
+            [Fact]
+            public void Path_OutFormat_Agnostic()
+            {
+                using (var img = Image.Load(this.Path, out IImageFormat format))
+                {
+                    VerifyDecodedImage(img);
+                    Assert.IsType<BmpFormat>(format);
+                }
+            }
+            [Fact]
+            public void WhenFileNotFound_Throws()
+            {
+                System.IO.FileNotFoundException ex = Assert.Throws<System.IO.FileNotFoundException>(
+                    () =>
+                        {
+                            Image.Load<Rgba32>(Guid.NewGuid().ToString());
+                        });
+            }
+
+            [Fact]
+            public void WhenPathIsNull_Throws()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                        {
+                            Image.Load<Rgba32>((string)null);
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
index 23c25d9dbb..67b19a0867 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromBytes_UseGlobalConfiguration.cs
@@ -17,13 +17,13 @@ namespace SixLabors.ImageSharp.Tests
     {
         public class Load_FromBytes_UseGlobalConfiguration
         {
-            private static byte[] ByteArray { get; } = TestFile.Create(TestImages.Bmp.F).Bytes;
+            private static byte[] ByteArray { get; } = TestFile.Create(TestImages.Bmp.Bit8).Bytes;
             
             private static Span<byte> ByteSpan => new Span<byte>(ByteArray);
 
             private static void VerifyDecodedImage(Image img)
             {
-                Assert.Equal(new Size(108, 202), img.Size());
+                Assert.Equal(new Size(127, 64), img.Size());
             }
             
             [Theory]
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs
index 27aba42ead..980ed17ceb 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_UseDefaultConfiguration.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.IO;
 
 using SixLabors.ImageSharp.Formats;
@@ -14,42 +15,41 @@ namespace SixLabors.ImageSharp.Tests
 {
     public partial class ImageTests
     {
-        public class Load_FromStream_UseDefaultConfiguration
+        public class Load_FromStream_UseDefaultConfiguration : IDisposable
         {
+            private static readonly byte[] Data = TestFile.Create(TestImages.Bmp.Bit8).Bytes;
+            
+            private MemoryStream Stream { get; } = new MemoryStream(Data);
+            
+            private static void VerifyDecodedImage(Image img)
+            {
+                Assert.Equal(new Size(127, 64), img.Size());
+            }
+            
             [Fact]
             public void Stream_Specific()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load<Rgba32>(stream))
+                using (var img = Image.Load<Rgba32>(this.Stream))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                 }
             }
             
             [Fact]
             public void Stream_Agnostic()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load(stream))
+                using (var img = Image.Load(this.Stream))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                 }
             }
             
             [Fact]
             public void Stream_OutFormat_Specific()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load<Rgba32>(stream, out IImageFormat format))
+                using (var img = Image.Load<Rgba32>(this.Stream, out IImageFormat format))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                     Assert.IsType<BmpFormat>(format);
                 }
             }
@@ -57,39 +57,35 @@ namespace SixLabors.ImageSharp.Tests
             [Fact]
             public void Stream_Decoder_Specific()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load<Rgba32>(stream, new BmpDecoder()))
+                using (var img = Image.Load<Rgba32>(this.Stream, new BmpDecoder()))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                 }
             }
             
             [Fact]
             public void Stream_Decoder_Agnostic()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load(stream, new BmpDecoder()))
+                using (var img = Image.Load(this.Stream, new BmpDecoder()))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                 }
             }
             
             [Fact]
             public void Stream_OutFormat_Agnostic()
             {
-                byte[] data = TestFile.Create(TestImages.Bmp.F).Bytes;
-
-                using (var stream = new MemoryStream(data))
-                using (var img = Image.Load(stream, out IImageFormat format))
+                using (var img = Image.Load(this.Stream, out IImageFormat format))
                 {
-                    Assert.Equal(new Size(108, 202), img.Size());
+                    VerifyDecodedImage(img);
                     Assert.IsType<BmpFormat>(format);
                 }
             }
+
+            public void Dispose()
+            {
+                this.Stream?.Dispose();
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index efdf89964c..0b727f30ce 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From 3998b6d895c01551356979689320c3ad458546ed Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 21:32:54 +0200
Subject: [PATCH 136/223] fix changes applied by mistake

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj               | 2 +-
 src/ImageSharp/ImageSharp.csproj                               | 2 +-
 .../Processing/Processors/Dithering/DitherTests.cs             | 3 ++-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index ac5d7fdea6..915915f6cc 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -10,8 +10,8 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
+
     <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
-    <TargetFramework>netstandard2.0</TargetFramework>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index e763b8ef1c..d734648f41 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -10,7 +10,7 @@
 
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-      
+
     <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
index 91422faaa1..cb901c2a88 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Dithering/DitherTests.cs
@@ -50,7 +50,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         /// The output is visually correct old 32bit runtime,
         /// but it is very different because of floating point inaccuracies.
         /// </summary>
-        private static readonly bool SkipAllDitherTests = false;
+        private static readonly bool SkipAllDitherTests =
+            !TestEnvironment.Is64BitProcess && string.IsNullOrEmpty(TestEnvironment.NetCoreVersion);
 
         [Theory]
         [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]

From f4e497de5a322efe9db633c4ec3f1780739b8249 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 22:13:29 +0200
Subject: [PATCH 137/223] Fix docs for processing extensions

---
 .../Processing/AutoOrientExtensions.cs        |  3 ++-
 .../Processing/BackgroundColorExtensions.cs   |  3 ++-
 .../Processing/BinaryDiffuseExtensions.cs     | 11 ++++----
 .../Processing/BinaryDitherExtensions.cs      | 11 ++++----
 .../Processing/BinaryThresholdExtensions.cs   | 11 ++++----
 .../Processing/BlackWhiteExtensions.cs        |  7 ++---
 .../Processing/BoxBlurExtensions.cs           |  9 ++++---
 .../Processing/BrightnessExtensions.cs        |  7 ++---
 .../Processing/ColorBlindnessExtensions.cs    |  8 +++---
 .../Processing/ContrastExtensions.cs          |  8 +++---
 src/ImageSharp/Processing/CropExtensions.cs   |  7 ++---
 .../Processing/DetectEdgesExtensions.cs       | 16 +++++------
 .../Processing/DiffuseExtensions.cs           | 15 ++++++-----
 src/ImageSharp/Processing/DitherExtensions.cs | 13 ++++-----
 .../Processing/EntropyCropExtensions.cs       |  7 ++---
 src/ImageSharp/Processing/FilterExtensions.cs |  7 ++---
 src/ImageSharp/Processing/FlipExtensions.cs   |  5 ++--
 .../Processing/GaussianBlurExtensions.cs      |  9 ++++---
 .../Processing/GaussianSharpenExtensions.cs   |  9 ++++---
 src/ImageSharp/Processing/GlowExtensions.cs   | 27 ++++++++++---------
 .../Processing/GrayscaleExtensions.cs         |  3 ++-
 .../HistogramEqualizationExtension.cs         |  6 ++---
 src/ImageSharp/Processing/HueExtensions.cs    |  7 ++---
 src/ImageSharp/Processing/InvertExtensions.cs |  7 ++---
 .../Processing/KodachromeExtensions.cs        |  7 ++---
 .../Processing/LomographExtensions.cs         |  7 ++---
 .../Processing/OilPaintExtensions.cs          | 11 ++++----
 .../Processing/OpacityExtensions.cs           |  7 ++---
 src/ImageSharp/Processing/PadExtensions.cs    |  5 ++--
 .../Processing/PixelateExtensions.cs          |  9 ++++---
 .../Processing/PolaroidExtensions.cs          |  7 ++---
 .../Processing/QuantizeExtensions.cs          |  7 ++---
 src/ImageSharp/Processing/ResizeExtensions.cs | 23 ++++++++--------
 src/ImageSharp/Processing/RotateExtensions.cs |  9 ++++---
 .../Processing/RotateFlipExtensions.cs        |  5 ++--
 .../Processing/SaturateExtensions.cs          |  7 ++---
 src/ImageSharp/Processing/SepiaExtensions.cs  | 11 ++++----
 src/ImageSharp/Processing/SkewExtensions.cs   |  7 ++---
 .../Processing/TransformExtensions.cs         | 17 ++++++------
 .../Processing/VignetteExtensions.cs          | 23 ++++++++--------
 40 files changed, 207 insertions(+), 171 deletions(-)

diff --git a/src/ImageSharp/Processing/AutoOrientExtensions.cs b/src/ImageSharp/Processing/AutoOrientExtensions.cs
index d11fc96237..d065d4583d 100644
--- a/src/ImageSharp/Processing/AutoOrientExtensions.cs
+++ b/src/ImageSharp/Processing/AutoOrientExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of auto-orientation operations to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of auto-orientation operations to an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class AutoOrientExtensions
     {
diff --git a/src/ImageSharp/Processing/BackgroundColorExtensions.cs b/src/ImageSharp/Processing/BackgroundColorExtensions.cs
index 1ad2c92371..3b794e3351 100644
--- a/src/ImageSharp/Processing/BackgroundColorExtensions.cs
+++ b/src/ImageSharp/Processing/BackgroundColorExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of a background color to the <see cref="Image{TPixel}"/> type.
+    /// Defines extension methods to replace the background color of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BackgroundColorExtensions
     {
diff --git a/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs b/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
index 788942dde4..487b64e1c4 100644
--- a/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds binary diffusion extensions to the <see cref="Image{TPixel}"/> type.
+    /// Defines extension methods to apply binary diffusion on an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BinaryDiffuseExtensions
     {
@@ -20,7 +21,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold));
@@ -35,7 +36,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold), rectangle);
@@ -49,7 +50,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel upperColor, TPixel lowerColor)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold, upperColor, lowerColor));
@@ -66,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold, upperColor, lowerColor), rectangle);
diff --git a/src/ImageSharp/Processing/BinaryDitherExtensions.cs b/src/ImageSharp/Processing/BinaryDitherExtensions.cs
index 6177701964..d8843dafac 100644
--- a/src/ImageSharp/Processing/BinaryDitherExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryDitherExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds binary dithering extensions to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions to apply binary dithering on an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BinaryDitherExtensions
     {
@@ -19,7 +20,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither));
@@ -32,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel upperColor, TPixel lowerColor)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither, upperColor, lowerColor));
@@ -46,7 +47,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither), rectangle);
@@ -62,7 +63,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither, upperColor, lowerColor), rectangle);
diff --git a/src/ImageSharp/Processing/BinaryThresholdExtensions.cs b/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
index 31f81ba4b1..aecb784848 100644
--- a/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds binary thresholding extensions to the <see cref="Image{TPixel}"/> type.
+    /// Defines extension methods to apply binary thresholding on an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BinaryThresholdExtensions
     {
@@ -18,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold));
@@ -32,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold), rectangle);
@@ -45,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, TPixel upperColor, TPixel lowerColor)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold, upperColor, lowerColor));
@@ -61,7 +62,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold, upperColor, lowerColor), rectangle);
diff --git a/src/ImageSharp/Processing/BlackWhiteExtensions.cs b/src/ImageSharp/Processing/BlackWhiteExtensions.cs
index 5dc2341e57..ee34cd99e2 100644
--- a/src/ImageSharp/Processing/BlackWhiteExtensions.cs
+++ b/src/ImageSharp/Processing/BlackWhiteExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of black and white toning to the <see cref="Image{TPixel}"/> type.
+    /// Defines extension methods that allow the application of black and white toning to an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BlackWhiteExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Applies black and white toning to the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BlackWhite(this IImageProcessingContext source)
             => source.ApplyProcessor(new BlackWhiteProcessor());
 
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BlackWhite(this IImageProcessingContext source, Rectangle rectangle)
             => source.ApplyProcessor(new BlackWhiteProcessor(), rectangle);
     }
diff --git a/src/ImageSharp/Processing/BoxBlurExtensions.cs b/src/ImageSharp/Processing/BoxBlurExtensions.cs
index bc6e06dd67..f3400c24e6 100644
--- a/src/ImageSharp/Processing/BoxBlurExtensions.cs
+++ b/src/ImageSharp/Processing/BoxBlurExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds box blurring extensions to the <see cref="Image"/> type.
+    /// Defines extensions methods to apply box blurring to an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BoxBlurExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Applies a box blur to the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BoxBlur(this IImageProcessingContext source)
             => source.ApplyProcessor(new BoxBlurProcessor());
 
@@ -25,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radius">The 'radius' value representing the size of the area to sample.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BoxBlur(this IImageProcessingContext source, int radius)
             => source.ApplyProcessor(new BoxBlurProcessor(radius));
 
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BoxBlur(this IImageProcessingContext source, int radius, Rectangle rectangle)
             => source.ApplyProcessor(new BoxBlurProcessor(radius), rectangle);
     }
diff --git a/src/ImageSharp/Processing/BrightnessExtensions.cs b/src/ImageSharp/Processing/BrightnessExtensions.cs
index 4de4dc897b..db84091763 100644
--- a/src/ImageSharp/Processing/BrightnessExtensions.cs
+++ b/src/ImageSharp/Processing/BrightnessExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the brightness component to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the alteration of the brightness component of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class BrightnessExtensions
     {
@@ -21,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </remarks>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Brightness(this IImageProcessingContext source, float amount)
             => source.ApplyProcessor(new BrightnessProcessor(amount));
 
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Brightness(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => source.ApplyProcessor(new BrightnessProcessor(amount), rectangle);
     }
diff --git a/src/ImageSharp/Processing/ColorBlindnessExtensions.cs b/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
index 000d47bd3e..b8d503955e 100644
--- a/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
+++ b/src/ImageSharp/Processing/ColorBlindnessExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.ImageSharp.Processing.Processors.Filters;
 using SixLabors.Primitives;
@@ -9,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that simulate the effects of various color blindness disorders to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that simulate the effects of various color blindness disorders on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class ColorBlindnessExtensions
     {
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="colorBlindness">The type of color blindness simulator to apply.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext ColorBlindness(this IImageProcessingContext source, ColorBlindnessMode colorBlindness)
             => source.ApplyProcessor(GetProcessor(colorBlindness));
 
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext ColorBlindness(this IImageProcessingContext source, ColorBlindnessMode colorBlindnessMode, Rectangle rectangle)
             => source.ApplyProcessor(GetProcessor(colorBlindnessMode), rectangle);
 
diff --git a/src/ImageSharp/Processing/ContrastExtensions.cs b/src/ImageSharp/Processing/ContrastExtensions.cs
index b03844d93b..bdfd7c98a4 100644
--- a/src/ImageSharp/Processing/ContrastExtensions.cs
+++ b/src/ImageSharp/Processing/ContrastExtensions.cs
@@ -1,14 +1,14 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Filters;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the contrast component to the <see cref="Image"/> type.
+    /// Defines extensions that allow the alteration of the contrast component of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class ContrastExtensions
     {
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </remarks>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Contrast(this IImageProcessingContext source, float amount)
             => source.ApplyProcessor(new ContrastProcessor(amount));
 
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Contrast(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => source.ApplyProcessor(new ContrastProcessor(amount), rectangle);
     }
diff --git a/src/ImageSharp/Processing/CropExtensions.cs b/src/ImageSharp/Processing/CropExtensions.cs
index 6aaff5656f..7ec85169e2 100644
--- a/src/ImageSharp/Processing/CropExtensions.cs
+++ b/src/ImageSharp/Processing/CropExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of cropping operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of cropping operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class CropExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Crop(this IImageProcessingContext source, int width, int height) =>
             Crop(source, new Rectangle(0, 0, width, height));
 
@@ -28,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="cropRectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to retain.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Crop(this IImageProcessingContext source, Rectangle cropRectangle) =>
             source.ApplyProcessor(new CropProcessor(cropRectangle, source.GetCurrentSize()));
     }
diff --git a/src/ImageSharp/Processing/DetectEdgesExtensions.cs b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
index 7527d601df..837b26910d 100644
--- a/src/ImageSharp/Processing/DetectEdgesExtensions.cs
+++ b/src/ImageSharp/Processing/DetectEdgesExtensions.cs
@@ -8,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds edge detection extensions to the <see cref="Image"/> type.
+    /// Defines edge detection extensions applicable on an <see cref="Image"/> using Mutate/Clone.
     /// </summary>
     public static class DetectEdgesExtensions
     {
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// operating in grayscale mode.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext DetectEdges(this IImageProcessingContext source) =>
             DetectEdges(source, new SobelProcessor(true));
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext DetectEdges(this IImageProcessingContext source, Rectangle rectangle) =>
             DetectEdges(source, rectangle, new SobelProcessor(true));
 
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext DetectEdges(
             this IImageProcessingContext source,
             EdgeDetectionOperators filter) =>
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
         /// <param name="grayscale">Whether to convert the image to grayscale first. Defaults to true.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext DetectEdges(
             this IImageProcessingContext source,
             EdgeDetectionOperators filter,
@@ -66,7 +66,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <param name="grayscale">Whether to convert the image to grayscale first. Defaults to true.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext DetectEdges(
             this IImageProcessingContext source,
             EdgeDetectionOperators filter,
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         private static IImageProcessingContext DetectEdges(this IImageProcessingContext source, IImageProcessor filter)
         {
             return source.ApplyProcessor(filter);
@@ -93,7 +93,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <param name="filter">The filter for detecting edges.</param>
-        /// <returns>The <see cref="Image"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         private static IImageProcessingContext DetectEdges(
             this IImageProcessingContext source,
             Rectangle rectangle,
diff --git a/src/ImageSharp/Processing/DiffuseExtensions.cs b/src/ImageSharp/Processing/DiffuseExtensions.cs
index 768d28116b..4668363e9a 100644
--- a/src/ImageSharp/Processing/DiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/DiffuseExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing.Dithering
 {
     /// <summary>
-    /// Adds diffusion extensions to the <see cref="Image{TPixel}"/> type.
+    /// Defines extension methods to apply diffusion to an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class DiffuseExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
             => Diffuse(source, KnownDiffusers.FloydSteinberg, .5F);
@@ -28,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, float threshold)
             where TPixel : struct, IPixel<TPixel>
             => Diffuse(source, KnownDiffusers.FloydSteinberg, threshold);
@@ -40,7 +41,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold));
@@ -55,7 +56,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold), rectangle);
@@ -68,7 +69,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel[] palette)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold, palette));
@@ -84,7 +85,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel[] palette, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold, palette), rectangle);
diff --git a/src/ImageSharp/Processing/DitherExtensions.cs b/src/ImageSharp/Processing/DitherExtensions.cs
index 795561e702..aeb975d1c1 100644
--- a/src/ImageSharp/Processing/DitherExtensions.cs
+++ b/src/ImageSharp/Processing/DitherExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds dithering extensions to the <see cref="Image{TPixel}"/> type.
+    /// Defines dithering extensions to apply on an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class DitherExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
             => Dither(source, KnownDitherers.BayerDither4x4);
@@ -28,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither));
@@ -40,7 +41,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel[] palette)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither, palette));
@@ -54,7 +55,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither), rectangle);
@@ -69,7 +70,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel[] palette, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither, palette), rectangle);
diff --git a/src/ImageSharp/Processing/EntropyCropExtensions.cs b/src/ImageSharp/Processing/EntropyCropExtensions.cs
index 34bc5daebf..de5296d83e 100644
--- a/src/ImageSharp/Processing/EntropyCropExtensions.cs
+++ b/src/ImageSharp/Processing/EntropyCropExtensions.cs
@@ -6,7 +6,8 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of entropy cropping operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of entropy cropping operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class EntropyCropExtensions
     {
@@ -14,7 +15,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Crops an image to the area of greatest entropy using a threshold for entropic density of <value>.5F</value>.
         /// </summary>
         /// <param name="source">The image to crop.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext EntropyCrop(this IImageProcessingContext source) =>
             source.ApplyProcessor(new EntropyCropProcessor());
 
@@ -23,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to crop.</param>
         /// <param name="threshold">The threshold for entropic density.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext EntropyCrop(this IImageProcessingContext source, float threshold) =>
             source.ApplyProcessor(new EntropyCropProcessor(threshold));
     }
diff --git a/src/ImageSharp/Processing/FilterExtensions.cs b/src/ImageSharp/Processing/FilterExtensions.cs
index 2a1c6bc7f9..5a66502ce5 100644
--- a/src/ImageSharp/Processing/FilterExtensions.cs
+++ b/src/ImageSharp/Processing/FilterExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of composable filters to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of composable filters to an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class FilterExtensions
     {
@@ -18,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="matrix">The filter color matrix</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Filter(this IImageProcessingContext source, ColorMatrix matrix)
             => source.ApplyProcessor(new FilterProcessor(matrix));
 
@@ -30,7 +31,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Filter(this IImageProcessingContext source, ColorMatrix matrix, Rectangle rectangle)
             => source.ApplyProcessor(new FilterProcessor(matrix), rectangle);
     }
diff --git a/src/ImageSharp/Processing/FlipExtensions.cs b/src/ImageSharp/Processing/FlipExtensions.cs
index bc862972e5..f6b3c0c374 100644
--- a/src/ImageSharp/Processing/FlipExtensions.cs
+++ b/src/ImageSharp/Processing/FlipExtensions.cs
@@ -6,7 +6,8 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of flipping operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of flipping operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class FlipExtensions
     {
@@ -15,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to rotate, flip, or both.</param>
         /// <param name="flipMode">The <see cref="FlipMode"/> to perform the flip.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Flip(this IImageProcessingContext source, FlipMode flipMode)
             => source.ApplyProcessor(new FlipProcessor(flipMode));
     }
diff --git a/src/ImageSharp/Processing/GaussianBlurExtensions.cs b/src/ImageSharp/Processing/GaussianBlurExtensions.cs
index 1dab054579..e527a14b73 100644
--- a/src/ImageSharp/Processing/GaussianBlurExtensions.cs
+++ b/src/ImageSharp/Processing/GaussianBlurExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds Gaussian blurring extensions to the <see cref="Image"/> type.
+    /// Defines Gaussian blurring extensions to apply on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class GaussianBlurExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Applies a Gaussian blur to the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source)
             => source.ApplyProcessor(new GaussianBlurProcessor());
 
@@ -25,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source, float sigma)
             => source.ApplyProcessor(new GaussianBlurProcessor(sigma));
 
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianBlur(this IImageProcessingContext source, float sigma, Rectangle rectangle)
             => source.ApplyProcessor(new GaussianBlurProcessor(sigma), rectangle);
     }
diff --git a/src/ImageSharp/Processing/GaussianSharpenExtensions.cs b/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
index 64aa7b5db3..79f4a0cc30 100644
--- a/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
+++ b/src/ImageSharp/Processing/GaussianSharpenExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds Gaussian sharpening extensions to the <see cref="Image"/> type.
+    /// Defines Gaussian sharpening extensions to apply on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class GaussianSharpenExtensions
     {
@@ -15,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Applies a Gaussian sharpening filter to the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianSharpen(this IImageProcessingContext source) =>
             source.ApplyProcessor(new GaussianSharpenProcessor());
 
@@ -24,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="sigma">The 'sigma' value representing the weight of the blur.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianSharpen(this IImageProcessingContext source, float sigma) =>
             source.ApplyProcessor(new GaussianSharpenProcessor(sigma));
 
@@ -36,7 +37,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext GaussianSharpen(
             this IImageProcessingContext source,
             float sigma,
diff --git a/src/ImageSharp/Processing/GlowExtensions.cs b/src/ImageSharp/Processing/GlowExtensions.cs
index 8b6e8ffc22..759fdccbea 100644
--- a/src/ImageSharp/Processing/GlowExtensions.cs
+++ b/src/ImageSharp/Processing/GlowExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of a radial glow to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of a radial glow on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class GlowExtensions
     {
@@ -18,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
             => Glow(source, GraphicsOptions.Default);
@@ -29,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the glow.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -42,7 +43,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radius">The the radius.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, float radius)
             where TPixel : struct, IPixel<TPixel>
             => Glow(source, GraphicsOptions.Default, radius);
@@ -55,7 +56,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(GraphicsOptions.Default, rectangle);
@@ -70,7 +71,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float radius, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(GraphicsOptions.Default, color, ValueSize.Absolute(radius), rectangle);
@@ -81,7 +82,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(0.5f));
@@ -93,7 +94,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(options, color, ValueSize.PercentageOfWidth(0.5f));
@@ -105,7 +106,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="radius">The the radius.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, float radius)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.Absolute(radius));
@@ -119,7 +120,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(0.5f), rectangle);
@@ -135,7 +136,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float radius, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.Glow(options, color, ValueSize.Absolute(radius), rectangle);
@@ -151,7 +152,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         private static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radius, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new GlowProcessor<TPixel>(color, radius, options), rectangle);
@@ -164,7 +165,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
         /// <param name="radius">The the radius.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         private static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radius)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new GlowProcessor<TPixel>(color, radius, options));
diff --git a/src/ImageSharp/Processing/GrayscaleExtensions.cs b/src/ImageSharp/Processing/GrayscaleExtensions.cs
index d68a385e47..a87341025d 100644
--- a/src/ImageSharp/Processing/GrayscaleExtensions.cs
+++ b/src/ImageSharp/Processing/GrayscaleExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of grayscale toning to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of grayscale toning to an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class GrayscaleExtensions
     {
diff --git a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
index aae3e997fe..01c14fc093 100644
--- a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
+++ b/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
@@ -6,7 +6,7 @@ using SixLabors.ImageSharp.Processing.Processors.Normalization;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extension that allow the adjustment of the contrast of an image via its histogram.
+    /// Defines extension that allow the adjustment of the contrast of an image via its histogram.
     /// </summary>
     public static class HistogramEqualizationExtension
     {
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Equalizes the histogram of an image to increases the contrast.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext HistogramEqualization(this IImageProcessingContext source) =>
             HistogramEqualization(source, HistogramEqualizationOptions.Default);
 
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The histogram equalization options to use.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext HistogramEqualization(
             this IImageProcessingContext source,
             HistogramEqualizationOptions options) =>
diff --git a/src/ImageSharp/Processing/HueExtensions.cs b/src/ImageSharp/Processing/HueExtensions.cs
index 17296e1db5..3c1239da67 100644
--- a/src/ImageSharp/Processing/HueExtensions.cs
+++ b/src/ImageSharp/Processing/HueExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the hue component to the <see cref="Image"/> type.
+    /// Defines extensions that allow the alteration of the hue component of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class HueExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="degrees">The rotation angle in degrees to adjust the hue.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Hue(this IImageProcessingContext source, float degrees)
             => source.ApplyProcessor(new HueProcessor(degrees));
 
@@ -29,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Hue(this IImageProcessingContext source, float degrees, Rectangle rectangle)
             => source.ApplyProcessor(new HueProcessor(degrees), rectangle);
     }
diff --git a/src/ImageSharp/Processing/InvertExtensions.cs b/src/ImageSharp/Processing/InvertExtensions.cs
index 828aaa1bbc..c45f24c2ea 100644
--- a/src/ImageSharp/Processing/InvertExtensions.cs
+++ b/src/ImageSharp/Processing/InvertExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the inversion of colors to the <see cref="Image"/> type.
+    /// Defines extensions that allow the inversion of colors of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class InvertExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Inverts the colors of the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Invert(this IImageProcessingContext source)
             => source.ApplyProcessor(new InvertProcessor(1F));
 
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Invert(this IImageProcessingContext source, Rectangle rectangle)
             => source.ApplyProcessor(new InvertProcessor(1F), rectangle);
     }
diff --git a/src/ImageSharp/Processing/KodachromeExtensions.cs b/src/ImageSharp/Processing/KodachromeExtensions.cs
index 24bd51e016..810094a180 100644
--- a/src/ImageSharp/Processing/KodachromeExtensions.cs
+++ b/src/ImageSharp/Processing/KodachromeExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Kodachrome camera effect to the <see cref="Image"/> type.
+    /// Defines extensions that allow the recreation of an old Kodachrome camera effect on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class KodachromeExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Alters the colors of the image recreating an old Kodachrome camera effect.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Kodachrome(this IImageProcessingContext source)
             => source.ApplyProcessor(new KodachromeProcessor());
 
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Kodachrome(this IImageProcessingContext source, Rectangle rectangle)
             => source.ApplyProcessor(new KodachromeProcessor(), rectangle);
     }
diff --git a/src/ImageSharp/Processing/LomographExtensions.cs b/src/ImageSharp/Processing/LomographExtensions.cs
index a3fd3d3b50..dd7ab21ec1 100644
--- a/src/ImageSharp/Processing/LomographExtensions.cs
+++ b/src/ImageSharp/Processing/LomographExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Lomograph camera effect to the <see cref="Image"/> type.
+    /// Defines extensions that allow the recreation of an old Lomograph camera effect on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class LomographExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Alters the colors of the image recreating an old Lomograph camera effect.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Lomograph(this IImageProcessingContext source)
             => source.ApplyProcessor(new LomographProcessor());
 
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Lomograph(this IImageProcessingContext source, Rectangle rectangle)
             => source.ApplyProcessor(new LomographProcessor(), rectangle);
     }
diff --git a/src/ImageSharp/Processing/OilPaintExtensions.cs b/src/ImageSharp/Processing/OilPaintExtensions.cs
index ee51b31fab..1aa98c8c1b 100644
--- a/src/ImageSharp/Processing/OilPaintExtensions.cs
+++ b/src/ImageSharp/Processing/OilPaintExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds oil painting effect extensions to the <see cref="Image"/> type.
+    /// Defines oil painting effect extensions applicable on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class OilPaintExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// set to <value>10</value> and <value>15</value> respectively.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext OilPaint(this IImageProcessingContext source) => OilPaint(source, 10, 15);
 
         /// <summary>
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext OilPaint(this IImageProcessingContext source, Rectangle rectangle) =>
             OilPaint(source, 10, 15, rectangle);
 
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="levels">The number of intensity levels. Higher values result in a broader range of color intensities forming part of the result image.</param>
         /// <param name="brushSize">The number of neighboring pixels used in calculating each individual pixel value.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext
             OilPaint(this IImageProcessingContext source, int levels, int brushSize) =>
             source.ApplyProcessor(new OilPaintingProcessor(levels, brushSize));
@@ -51,7 +52,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext OilPaint(
             this IImageProcessingContext source,
             int levels,
diff --git a/src/ImageSharp/Processing/OpacityExtensions.cs b/src/ImageSharp/Processing/OpacityExtensions.cs
index 6d9198648c..ecf6ce783e 100644
--- a/src/ImageSharp/Processing/OpacityExtensions.cs
+++ b/src/ImageSharp/Processing/OpacityExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the opacity component to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the alteration of the opacity component of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class OpacityExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Opacity(this IImageProcessingContext source, float amount)
             => source.ApplyProcessor(new OpacityProcessor(amount));
 
@@ -29,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Opacity(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => source.ApplyProcessor(new OpacityProcessor(amount), rectangle);
     }
diff --git a/src/ImageSharp/Processing/PadExtensions.cs b/src/ImageSharp/Processing/PadExtensions.cs
index 0422f7c59d..29f80b43ff 100644
--- a/src/ImageSharp/Processing/PadExtensions.cs
+++ b/src/ImageSharp/Processing/PadExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of padding operations to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of padding operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class PadExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The source image to pad.</param>
         /// <param name="width">The new width.</param>
         /// <param name="height">The new height.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Pad(this IImageProcessingContext source, int width, int height)
         {
             var options = new ResizeOptions
diff --git a/src/ImageSharp/Processing/PixelateExtensions.cs b/src/ImageSharp/Processing/PixelateExtensions.cs
index d9f7f9be50..bf40af91ad 100644
--- a/src/ImageSharp/Processing/PixelateExtensions.cs
+++ b/src/ImageSharp/Processing/PixelateExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds pixelation effect extensions to the <see cref="Image"/> type.
+    /// Defines pixelation effect extensions applicable on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class PixelateExtensions
     {
@@ -15,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Pixelates an image with the given pixel size.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Pixelate(this IImageProcessingContext source) => Pixelate(source, 4);
 
         /// <summary>
@@ -23,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="size">The size of the pixels.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Pixelate(this IImageProcessingContext source, int size) =>
             source.ApplyProcessor(new PixelateProcessor(size));
 
@@ -35,7 +36,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Pixelate(
             this IImageProcessingContext source,
             int size,
diff --git a/src/ImageSharp/Processing/PolaroidExtensions.cs b/src/ImageSharp/Processing/PolaroidExtensions.cs
index 4e78411689..eace463579 100644
--- a/src/ImageSharp/Processing/PolaroidExtensions.cs
+++ b/src/ImageSharp/Processing/PolaroidExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the recreation of an old Polaroid camera effect to the <see cref="Image"/> type.
+    /// Defines extensions that allow the recreation of an old Polaroid camera effect on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class PolaroidExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Alters the colors of the image recreating an old Polaroid camera effect.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Polaroid(this IImageProcessingContext source)
             => source.ApplyProcessor(new PolaroidProcessor());
 
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Polaroid(this IImageProcessingContext source, Rectangle rectangle)
             => source.ApplyProcessor(new PolaroidProcessor(), rectangle);
     }
diff --git a/src/ImageSharp/Processing/QuantizeExtensions.cs b/src/ImageSharp/Processing/QuantizeExtensions.cs
index 5bd2f49bd4..ad351afa99 100644
--- a/src/ImageSharp/Processing/QuantizeExtensions.cs
+++ b/src/ImageSharp/Processing/QuantizeExtensions.cs
@@ -7,7 +7,8 @@ using SixLabors.ImageSharp.Processing.Processors.Quantization;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of quantizing algorithms to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of quantizing algorithms on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class QuantizeExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Quantize<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
             => Quantize(source, KnownQuantizers.Octree);
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="quantizer">The quantizer to apply to perform the operation.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Quantize<TPixel>(this IImageProcessingContext<TPixel> source, IQuantizer quantizer)
             where TPixel : struct, IPixel<TPixel>
             => source.ApplyProcessor(new QuantizeProcessor<TPixel>(quantizer));
diff --git a/src/ImageSharp/Processing/ResizeExtensions.cs b/src/ImageSharp/Processing/ResizeExtensions.cs
index 57dbcb1d16..4578b4353f 100644
--- a/src/ImageSharp/Processing/ResizeExtensions.cs
+++ b/src/ImageSharp/Processing/ResizeExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of resize operations to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of resize operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class ResizeExtensions
     {
@@ -17,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to resize.</param>
         /// <param name="options">The resize options.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width within the resize options will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, ResizeOptions options)
             => source.ApplyProcessor(new ResizeProcessor(options, source.GetCurrentSize()));
@@ -27,7 +28,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to resize.</param>
         /// <param name="size">The target image size.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size)
             => Resize(source, size.Width, size.Height, KnownResamplers.Bicubic, false);
@@ -38,7 +39,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to resize.</param>
         /// <param name="size">The target image size.</param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size, bool compand)
             => Resize(source, size.Width, size.Height, KnownResamplers.Bicubic, compand);
@@ -49,7 +50,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to resize.</param>
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height)
             => Resize(source, width, height, KnownResamplers.Bicubic, false);
@@ -61,7 +62,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, bool compand)
             => Resize(source, width, height, KnownResamplers.Bicubic, compand);
@@ -73,7 +74,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="width">The target image width.</param>
         /// <param name="height">The target image height.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, IResampler sampler)
             => Resize(source, width, height, sampler, false);
@@ -85,7 +86,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="size">The target image size.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, Size size, IResampler sampler, bool compand)
             => Resize(source, size.Width, size.Height, sampler, new Rectangle(0, 0, size.Width, size.Height), compand);
@@ -98,7 +99,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="height">The target image height.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(this IImageProcessingContext source, int width, int height, IResampler sampler, bool compand)
             => Resize(source, width, height, sampler, new Rectangle(0, 0, width, height), compand);
@@ -118,7 +119,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
         /// </param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(
             this IImageProcessingContext source,
@@ -141,7 +142,7 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
         /// </param>
         /// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         /// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image or the nearest possible ratio.</remarks>
         public static IImageProcessingContext Resize(
             this IImageProcessingContext source,
diff --git a/src/ImageSharp/Processing/RotateExtensions.cs b/src/ImageSharp/Processing/RotateExtensions.cs
index cb637a1b84..395462ae33 100644
--- a/src/ImageSharp/Processing/RotateExtensions.cs
+++ b/src/ImageSharp/Processing/RotateExtensions.cs
@@ -6,7 +6,8 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of rotate operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of rotate operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class RotateExtensions
     {
@@ -15,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to rotate.</param>
         /// <param name="rotateMode">The <see cref="RotateMode"/> to perform the rotation.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Rotate(this IImageProcessingContext source, RotateMode rotateMode) =>
             Rotate(source, (float)rotateMode);
 
@@ -24,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to rotate.</param>
         /// <param name="degrees">The angle in degrees to perform the rotation.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Rotate(this IImageProcessingContext source, float degrees) =>
             Rotate(source, degrees, KnownResamplers.Bicubic);
 
@@ -34,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to rotate.</param>
         /// <param name="degrees">The angle in degrees to perform the rotation.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Rotate(
             this IImageProcessingContext source,
             float degrees,
diff --git a/src/ImageSharp/Processing/RotateFlipExtensions.cs b/src/ImageSharp/Processing/RotateFlipExtensions.cs
index 5030c942ef..4d5d90c30e 100644
--- a/src/ImageSharp/Processing/RotateFlipExtensions.cs
+++ b/src/ImageSharp/Processing/RotateFlipExtensions.cs
@@ -6,7 +6,8 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of rotate-flip operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of rotate-flip operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class RotateFlipExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to rotate, flip, or both.</param>
         /// <param name="rotateMode">The <see cref="RotateMode"/> to perform the rotation.</param>
         /// <param name="flipMode">The <see cref="FlipMode"/> to perform the flip.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext RotateFlip(this IImageProcessingContext source, RotateMode rotateMode, FlipMode flipMode)
             => source.Rotate(rotateMode).Flip(flipMode);
     }
diff --git a/src/ImageSharp/Processing/SaturateExtensions.cs b/src/ImageSharp/Processing/SaturateExtensions.cs
index fe2cf5f348..e9ba820b6c 100644
--- a/src/ImageSharp/Processing/SaturateExtensions.cs
+++ b/src/ImageSharp/Processing/SaturateExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the alteration of the saturation component to the <see cref="Image"/> type.
+    /// Defines extensions that allow the alteration of the saturation component of an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class SaturateExtensions
     {
@@ -21,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </remarks>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be greater than or equal to 0.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Saturate(this IImageProcessingContext source, float amount)
             => source.ApplyProcessor(new SaturateProcessor(amount));
 
@@ -37,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Saturate(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => source.ApplyProcessor(new SaturateProcessor(amount), rectangle);
     }
diff --git a/src/ImageSharp/Processing/SepiaExtensions.cs b/src/ImageSharp/Processing/SepiaExtensions.cs
index 5b23ec11af..5ee5151fae 100644
--- a/src/ImageSharp/Processing/SepiaExtensions.cs
+++ b/src/ImageSharp/Processing/SepiaExtensions.cs
@@ -8,7 +8,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of sepia toning to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of sepia toning on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class SepiaExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Applies sepia toning to the image.
         /// </summary>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Sepia(this IImageProcessingContext source)
              => Sepia(source, 1F);
 
@@ -25,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="amount">The proportion of the conversion. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Sepia(this IImageProcessingContext source, float amount)
              => source.ApplyProcessor(new SepiaProcessor(amount));
 
@@ -36,7 +37,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Sepia(this IImageProcessingContext source, Rectangle rectangle)
             => Sepia(source, 1F, rectangle);
 
@@ -48,7 +49,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Sepia(this IImageProcessingContext source, float amount, Rectangle rectangle)
             => source.ApplyProcessor(new SepiaProcessor(amount), rectangle);
     }
diff --git a/src/ImageSharp/Processing/SkewExtensions.cs b/src/ImageSharp/Processing/SkewExtensions.cs
index 7f378d2483..77a46af0d9 100644
--- a/src/ImageSharp/Processing/SkewExtensions.cs
+++ b/src/ImageSharp/Processing/SkewExtensions.cs
@@ -6,7 +6,8 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of skew operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of skew operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class SkewExtensions
     {
@@ -16,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to skew.</param>
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext
             Skew(this IImageProcessingContext source, float degreesX, float degreesY) =>
             Skew(source, degreesX, degreesY, KnownResamplers.Bicubic);
@@ -28,7 +29,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="degreesX">The angle in degrees to perform the skew along the x-axis.</param>
         /// <param name="degreesY">The angle in degrees to perform the skew along the y-axis.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Skew(
             this IImageProcessingContext source,
             float degreesX,
diff --git a/src/ImageSharp/Processing/TransformExtensions.cs b/src/ImageSharp/Processing/TransformExtensions.cs
index 35f374d013..7fffb71d20 100644
--- a/src/ImageSharp/Processing/TransformExtensions.cs
+++ b/src/ImageSharp/Processing/TransformExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of composable transform operations to the <see cref="Image"/> type.
+    /// Defines extensions that allow the application of composable transform operations on an <see cref="Image"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class TransformExtensions
     {
@@ -30,7 +31,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="builder">The affine transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             AffineTransformBuilder builder,
@@ -44,7 +45,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="builder">The affine transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
@@ -64,7 +65,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="transform">The transformation matrix.</param>
         /// <param name="targetDimensions">The size of the result image.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
@@ -82,7 +83,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image to transform.</param>
         /// <param name="builder">The affine transform builder.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext source,
             ProjectiveTransformBuilder builder) =>
@@ -94,7 +95,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="ctx">The <see cref="IImageProcessingContext"/>.</param>
         /// <param name="builder">The projective transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             ProjectiveTransformBuilder builder,
@@ -108,7 +109,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="sourceRectangle">The source rectangle</param>
         /// <param name="builder">The projective transform builder.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
@@ -128,7 +129,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="transform">The transformation matrix.</param>
         /// <param name="targetDimensions">The size of the result image.</param>
         /// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Transform(
             this IImageProcessingContext ctx,
             Rectangle sourceRectangle,
diff --git a/src/ImageSharp/Processing/VignetteExtensions.cs b/src/ImageSharp/Processing/VignetteExtensions.cs
index 18dd8064c6..63cdee3f83 100644
--- a/src/ImageSharp/Processing/VignetteExtensions.cs
+++ b/src/ImageSharp/Processing/VignetteExtensions.cs
@@ -9,7 +9,8 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Adds extensions that allow the application of a radial glow to the <see cref="Image{TPixel}"/> type.
+    /// Defines extensions that allow the application of a radial glow to an <see cref="Image{TPixel}"/>
+    /// using Mutate/Clone.
     /// </summary>
     public static class VignetteExtensions
     {
@@ -18,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
             => Vignette(source, GraphicsOptions.Default);
@@ -29,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the vignette.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
             where TPixel : struct, IPixel<TPixel>
             => Vignette(source, GraphicsOptions.Default, color);
@@ -41,7 +42,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="radiusX">The the x-radius.</param>
         /// <param name="radiusY">The the y-radius.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, float radiusX, float radiusY)
             where TPixel : struct, IPixel<TPixel>
             => Vignette(source, GraphicsOptions.Default, radiusX, radiusY);
@@ -54,7 +55,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => Vignette(source, GraphicsOptions.Default, rectangle);
@@ -70,7 +71,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float radiusX, float radiusY, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.Vignette(GraphicsOptions.Default, color, radiusX, radiusY, rectangle);
@@ -81,7 +82,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel>
             => source.VignetteInternal(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f));
@@ -93,7 +94,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="color">The color to set as the vignette.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color)
             where TPixel : struct, IPixel<TPixel>
             => source.VignetteInternal(options, color, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f));
@@ -106,7 +107,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="radiusX">The the x-radius.</param>
         /// <param name="radiusY">The the y-radius.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, float radiusX, float radiusY)
             where TPixel : struct, IPixel<TPixel>
             => source.VignetteInternal(options, NamedColors<TPixel>.Black, radiusX, radiusY);
@@ -120,7 +121,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.VignetteInternal(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f), rectangle);
@@ -137,7 +138,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float radiusX, float radiusY, Rectangle rectangle)
             where TPixel : struct, IPixel<TPixel>
             => source.VignetteInternal(options, color, radiusX, radiusY, rectangle);

From fefb0e66a467ff5ade373802afc3a5b7ddbbbc21 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 22:31:06 +0200
Subject: [PATCH 138/223] publish non-generic QuantizeProcessor

---
 ImageSharp.sln.DotSettings                    |  1 +
 .../Quantization/QuantizeProcessor.cs         | 41 +++----------
 .../Quantization/QuantizeProcessor{TPixel}.cs | 57 +++++++++++++++++++
 .../Processing/QuantizeExtensions.cs          | 13 ++---
 4 files changed, 70 insertions(+), 42 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs

diff --git a/ImageSharp.sln.DotSettings b/ImageSharp.sln.DotSettings
index 8e7b5dd488..5268172429 100644
--- a/ImageSharp.sln.DotSettings
+++ b/ImageSharp.sln.DotSettings
@@ -388,4 +388,5 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateBlankLinesAroundFieldToBlankLinesAroundProperty/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateThisQualifierSettings/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Quantizer/@EntryIndexedValue">True</s:Boolean>
 </wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
index e99f504b42..0aee0b4831 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor.cs
@@ -1,59 +1,34 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 {
     /// <summary>
-    /// Enables the quantization of images to reduce the number of colors used in the image palette.
+    /// Defines quantization processing for images to reduce the number of colors used in the image palette.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class QuantizeProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class QuantizeProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="QuantizeProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="QuantizeProcessor"/> class.
         /// </summary>
-        /// <param name="quantizer">The quantizer used to reduce the color palette</param>
+        /// <param name="quantizer">The quantizer used to reduce the color palette.</param>
         public QuantizeProcessor(IQuantizer quantizer)
         {
-            Guard.NotNull(quantizer, nameof(quantizer));
             this.Quantizer = quantizer;
         }
 
         /// <summary>
-        /// Gets the quantizer
+        /// Gets the quantizer.
         /// </summary>
         public IQuantizer Quantizer { get; }
 
         /// <inheritdoc />
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            using (IFrameQuantizer<TPixel> executor = this.Quantizer.CreateFrameQuantizer<TPixel>(configuration))
-            using (QuantizedFrame<TPixel> quantized = executor.QuantizeFrame(source))
-            {
-                int paletteCount = quantized.Palette.Length - 1;
-
-                // Not parallel to remove "quantized" closure allocation.
-                // We can operate directly on the source here as we've already read it to get the
-                // quantized result
-                for (int y = 0; y < source.Height; y++)
-                {
-                    Span<TPixel> row = source.GetPixelRowSpan(y);
-                    ReadOnlySpan<byte> quantizedPixelSpan = quantized.GetPixelSpan();
-                    int yy = y * source.Width;
-
-                    for (int x = 0; x < source.Width; x++)
-                    {
-                        int i = x + yy;
-                        row[x] = quantized.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
-                    }
-                }
-            }
+            return new QuantizeProcessor<TPixel>(this.Quantizer);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
new file mode 100644
index 0000000000..b52343a2ae
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
@@ -0,0 +1,57 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Quantization
+{
+    /// <summary>
+    /// Enables the quantization of images to reduce the number of colors used in the image palette.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class QuantizeProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly IQuantizer quantizer;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="QuantizeProcessor{TPixel}"/> class.
+        /// </summary>
+        /// <param name="quantizer">The quantizer used to reduce the color palette.</param>
+        public QuantizeProcessor(IQuantizer quantizer)
+        {
+            Guard.NotNull(quantizer, nameof(quantizer));
+            this.quantizer = quantizer;
+        }
+
+        /// <inheritdoc />
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            using (IFrameQuantizer<TPixel> executor = this.quantizer.CreateFrameQuantizer<TPixel>(configuration))
+            using (QuantizedFrame<TPixel> quantized = executor.QuantizeFrame(source))
+            {
+                int paletteCount = quantized.Palette.Length - 1;
+
+                // Not parallel to remove "quantized" closure allocation.
+                // We can operate directly on the source here as we've already read it to get the
+                // quantized result
+                for (int y = 0; y < source.Height; y++)
+                {
+                    Span<TPixel> row = source.GetPixelRowSpan(y);
+                    ReadOnlySpan<byte> quantizedPixelSpan = quantized.GetPixelSpan();
+                    int yy = y * source.Width;
+
+                    for (int x = 0; x < source.Width; x++)
+                    {
+                        int i = x + yy;
+                        row[x] = quantized.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/QuantizeExtensions.cs b/src/ImageSharp/Processing/QuantizeExtensions.cs
index ad351afa99..3410ee6bec 100644
--- a/src/ImageSharp/Processing/QuantizeExtensions.cs
+++ b/src/ImageSharp/Processing/QuantizeExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 
 namespace SixLabors.ImageSharp.Processing
@@ -15,22 +14,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies quantization to the image using the <see cref="OctreeQuantizer"/>.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Quantize<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Quantize(source, KnownQuantizers.Octree);
+        public static IImageProcessingContext Quantize(this IImageProcessingContext source) =>
+            Quantize(source, KnownQuantizers.Octree);
 
         /// <summary>
         /// Applies quantization to the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="quantizer">The quantizer to apply to perform the operation.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Quantize<TPixel>(this IImageProcessingContext<TPixel> source, IQuantizer quantizer)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new QuantizeProcessor<TPixel>(quantizer));
+        public static IImageProcessingContext Quantize(this IImageProcessingContext source, IQuantizer quantizer) =>
+            source.ApplyProcessor(new QuantizeProcessor(quantizer));
     }
 }
\ No newline at end of file

From 43c78abf321ce16e486b5487c95e9579f92ed441 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 23:14:41 +0200
Subject: [PATCH 139/223] temporarily disable multitargeting

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj | 3 ++-
 src/ImageSharp/ImageSharp.csproj                 | 3 ++-
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj   | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 915915f6cc..fdeb27a770 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -11,7 +11,8 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
+    <TargetFramework>netstandard2.0</TargetFramework>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index d734648f41..4abe2f57a2 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -11,7 +11,8 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
+    <TargetFramework>netstandard2.0</TargetFramework>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 0b727f30ce..efdf89964c 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From 2e402ba35da09efd6367964ef6118e96246101af Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 23:30:32 +0200
Subject: [PATCH 140/223] add skeleton for Color type

---
 src/ImageSharp/Color.cs                       | 42 +++++++++++++++++++
 .../PixelImplementations/Rgba64.cs            | 15 +++++++
 .../Codecs/GetSetPixel.cs                     |  4 +-
 .../Drawing/DrawBeziers.cs                    |  2 +-
 .../Drawing/DrawLines.cs                      |  2 +-
 .../Drawing/DrawPolygon.cs                    |  2 +-
 .../Drawing/DrawTextOutline.cs                |  2 +-
 .../Drawing/FillWithPattern.cs                |  2 +-
 tests/ImageSharp.Tests/ColorTests.cs          | 10 +++++
 9 files changed, 74 insertions(+), 7 deletions(-)
 create mode 100644 src/ImageSharp/Color.cs
 create mode 100644 tests/ImageSharp.Tests/ColorTests.cs

diff --git a/src/ImageSharp/Color.cs b/src/ImageSharp/Color.cs
new file mode 100644
index 0000000000..5b3de2eee3
--- /dev/null
+++ b/src/ImageSharp/Color.cs
@@ -0,0 +1,42 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Numerics;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    public struct Color
+    {
+        private Rgba64 data;
+
+        public Color(Rgba64 pixel)
+        {
+            this.data = pixel;
+        }
+
+        public Color(Rgba32 pixel)
+        {
+            this.data = default;
+            this.data.FromRgba32(pixel);
+        }
+
+        public Color(Vector4 vector)
+        {
+            this.data = default;
+            this.data.FromVector4(vector);
+        }
+
+        public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
+        public static Color FromRgba(ushort r, ushort g, ushort b, ushort a) => new Color(new Rgba64(r, g, b, a));
+        
+        public TPixel ToPixel<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel pixel = default;
+            pixel.FromRgba64(this.data);
+            return pixel;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
index 87d1b235bf..6d838a54dd 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
@@ -54,6 +54,21 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.A = a;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="r">The red component.</param>
+        /// <param name="g">The green component.</param>
+        /// <param name="b">The blue component.</param>
+        /// <param name="a">The alpha component.</param>
+        public Rgba64(byte r, byte g, byte b, byte a)
+        {
+            this.R = r;
+            this.G = g;
+            this.B = b;
+            this.A = a;
+        }
+
         /// <summary>
         /// Gets or sets the RGB components of this struct as <see cref="Rgb48"/>
         /// </summary>
diff --git a/tests/ImageSharp.Benchmarks/Codecs/GetSetPixel.cs b/tests/ImageSharp.Benchmarks/Codecs/GetSetPixel.cs
index a51ce8ebc6..f0d7a54d08 100644
--- a/tests/ImageSharp.Benchmarks/Codecs/GetSetPixel.cs
+++ b/tests/ImageSharp.Benchmarks/Codecs/GetSetPixel.cs
@@ -10,11 +10,11 @@ namespace SixLabors.ImageSharp.Benchmarks.Codecs
     public class GetSetPixel : BenchmarkBase
     {
         [Benchmark(Baseline = true, Description = "System.Drawing GetSet pixel")]
-        public Color ResizeSystemDrawing()
+        public System.Drawing.Color ResizeSystemDrawing()
         {
             using (var source = new Bitmap(400, 400))
             {
-                source.SetPixel(200, 200, Color.White);
+                source.SetPixel(200, 200, System.Drawing.Color.White);
                 return source.GetPixel(200, 200);
             }
         }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
index bc9c1c96d2..0a343864d8 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (var pen = new Pen(Color.HotPink, 10))
+                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawBeziers(pen, new[] {
                         new PointF(10, 500),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
index 4265525e5b..00942cc364 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (var pen = new Pen(Color.HotPink, 10))
+                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawLines(pen, new[] {
                         new PointF(10, 10),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
index 4172b3c38f..dcaf4bae60 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             {
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                using (var pen = new Pen(Color.HotPink, 10))
+                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawPolygon(pen, new[] {
                         new PointF(10, 10),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
index b99c47960b..ee17adbb55 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             {
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                using (var pen = new Pen(Color.HotPink, 10))
+                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
                 using (var font = new Font("Arial", 12, GraphicsUnit.Point))
                 using (var gp = new GraphicsPath())
                 {
diff --git a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
index 3c9cfd7e34..411f8210a9 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/FillWithPattern.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             {
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (var brush = new HatchBrush(HatchStyle.BackwardDiagonal, Color.HotPink))
+                using (var brush = new HatchBrush(HatchStyle.BackwardDiagonal, System.Drawing.Color.HotPink))
                 {
                     graphics.FillRectangle(brush, new Rectangle(0, 0, 800, 800)); // can't find a way to flood fill with a brush
                 }
diff --git a/tests/ImageSharp.Tests/ColorTests.cs b/tests/ImageSharp.Tests/ColorTests.cs
new file mode 100644
index 0000000000..4142066bc8
--- /dev/null
+++ b/tests/ImageSharp.Tests/ColorTests.cs
@@ -0,0 +1,10 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public class ColorTests
+    {
+        
+    }
+}
\ No newline at end of file

From 99916fb452b577b50ec65983557d846b4c13d52d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 5 May 2019 23:52:39 +0200
Subject: [PATCH 141/223] add more Rgba64 constructor overloads

---
 src/ImageSharp/Color.cs                       |   6 +-
 .../PixelImplementations/Rgba64.cs            | 146 +++++++++++-
 .../PixelFormats/Rgba64Tests.cs               | 215 ++++++++++++++++--
 3 files changed, 336 insertions(+), 31 deletions(-)

diff --git a/src/ImageSharp/Color.cs b/src/ImageSharp/Color.cs
index 5b3de2eee3..4f6cab97bb 100644
--- a/src/ImageSharp/Color.cs
+++ b/src/ImageSharp/Color.cs
@@ -18,8 +18,7 @@ namespace SixLabors.ImageSharp
 
         public Color(Rgba32 pixel)
         {
-            this.data = default;
-            this.data.FromRgba32(pixel);
+            this.data = new Rgba64(pixel);
         }
 
         public Color(Vector4 vector)
@@ -29,8 +28,7 @@ namespace SixLabors.ImageSharp
         }
 
         public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
-        public static Color FromRgba(ushort r, ushort g, ushort b, ushort a) => new Color(new Rgba64(r, g, b, a));
-        
+
         public TPixel ToPixel<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
index 6d838a54dd..cf9d4a5527 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
@@ -57,20 +57,78 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <summary>
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
-        /// <param name="r">The red component.</param>
-        /// <param name="g">The green component.</param>
-        /// <param name="b">The blue component.</param>
-        /// <param name="a">The alpha component.</param>
-        public Rgba64(byte r, byte g, byte b, byte a)
+        /// <param name="source">A structure of 4 bytes in RGBA byte order.</param>
+        public Rgba64(Rgba32 source)
         {
-            this.R = r;
-            this.G = g;
-            this.B = b;
-            this.A = a;
+            this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
+            this.G = ImageMaths.UpscaleFrom8BitTo16Bit(source.G);
+            this.B = ImageMaths.UpscaleFrom8BitTo16Bit(source.B);
+            this.A = ImageMaths.UpscaleFrom8BitTo16Bit(source.A);
         }
 
         /// <summary>
-        /// Gets or sets the RGB components of this struct as <see cref="Rgb48"/>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="source">A structure of 4 bytes in BGRA byte order.</param>
+        public Rgba64(Bgra32 source)
+        {
+            this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
+            this.G = ImageMaths.UpscaleFrom8BitTo16Bit(source.G);
+            this.B = ImageMaths.UpscaleFrom8BitTo16Bit(source.B);
+            this.A = ImageMaths.UpscaleFrom8BitTo16Bit(source.A);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="source">A structure of 4 bytes in ARGB byte order.</param>
+        public Rgba64(Argb32 source)
+        {
+            this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
+            this.G = ImageMaths.UpscaleFrom8BitTo16Bit(source.G);
+            this.B = ImageMaths.UpscaleFrom8BitTo16Bit(source.B);
+            this.A = ImageMaths.UpscaleFrom8BitTo16Bit(source.A);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="source">A structure of 3 bytes in RGB byte order.</param>
+        public Rgba64(Rgb24 source)
+        {
+            this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
+            this.G = ImageMaths.UpscaleFrom8BitTo16Bit(source.G);
+            this.B = ImageMaths.UpscaleFrom8BitTo16Bit(source.B);
+            this.A = ushort.MaxValue;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="source">A structure of 3 bytes in BGR byte order.</param>
+        public Rgba64(Bgr24 source)
+        {
+            this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
+            this.G = ImageMaths.UpscaleFrom8BitTo16Bit(source.G);
+            this.B = ImageMaths.UpscaleFrom8BitTo16Bit(source.B);
+            this.A = ushort.MaxValue;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Rgba64"/> struct.
+        /// </summary>
+        /// <param name="vector">The <see cref="Vector4"/>.</param>
+        public Rgba64(Vector4 vector)
+        {
+            vector = Vector4.Clamp(vector, Vector4.Zero, Vector4.One) * Max;
+            this.R = (ushort)MathF.Round(vector.X);
+            this.G = (ushort)MathF.Round(vector.Y);
+            this.B = (ushort)MathF.Round(vector.Z);
+            this.A = (ushort)MathF.Round(vector.W);
+        }
+
+        /// <summary>
+        /// Gets or sets the RGB components of this struct as <see cref="Rgb48"/>.
         /// </summary>
         public Rgb48 Rgb
         {
@@ -236,6 +294,74 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FromRgba64(Rgba64 source) => this = source;
 
+        /// <summary>
+        /// Convert to <see cref="Rgba32"/>.
+        /// </summary>
+        /// <returns>The <see cref="Rgba32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Rgba32 ToRgba32()
+        {
+            byte r = ImageMaths.DownScaleFrom16BitTo8Bit(this.R);
+            byte g = ImageMaths.DownScaleFrom16BitTo8Bit(this.G);
+            byte b = ImageMaths.DownScaleFrom16BitTo8Bit(this.B);
+            byte a = ImageMaths.DownScaleFrom16BitTo8Bit(this.A);
+            return new Rgba32(r, g, b, a);
+        }
+
+        /// <summary>
+        /// Convert to <see cref="Bgra32"/>.
+        /// </summary>
+        /// <returns>The <see cref="Bgra32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Bgra32 ToBgra32()
+        {
+            byte r = ImageMaths.DownScaleFrom16BitTo8Bit(this.R);
+            byte g = ImageMaths.DownScaleFrom16BitTo8Bit(this.G);
+            byte b = ImageMaths.DownScaleFrom16BitTo8Bit(this.B);
+            byte a = ImageMaths.DownScaleFrom16BitTo8Bit(this.A);
+            return new Bgra32(r, g, b, a);
+        }
+
+        /// <summary>
+        /// Convert to <see cref="Argb32"/>.
+        /// </summary>
+        /// <returns>The <see cref="Argb32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Argb32 ToArgb32()
+        {
+            byte r = ImageMaths.DownScaleFrom16BitTo8Bit(this.R);
+            byte g = ImageMaths.DownScaleFrom16BitTo8Bit(this.G);
+            byte b = ImageMaths.DownScaleFrom16BitTo8Bit(this.B);
+            byte a = ImageMaths.DownScaleFrom16BitTo8Bit(this.A);
+            return new Argb32(r, g, b, a);
+        }
+
+        /// <summary>
+        /// Convert to <see cref="Rgb24"/>.
+        /// </summary>
+        /// <returns>The <see cref="Rgb24"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Rgb24 ToRgb24()
+        {
+            byte r = ImageMaths.DownScaleFrom16BitTo8Bit(this.R);
+            byte g = ImageMaths.DownScaleFrom16BitTo8Bit(this.G);
+            byte b = ImageMaths.DownScaleFrom16BitTo8Bit(this.B);
+            return new Rgb24(r, g, b);
+        }
+
+        /// <summary>
+        /// Convert to <see cref="Bgr24"/>.
+        /// </summary>
+        /// <returns>The <see cref="Bgr24"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Bgr24 ToBgr24()
+        {
+            byte r = ImageMaths.DownScaleFrom16BitTo8Bit(this.R);
+            byte g = ImageMaths.DownScaleFrom16BitTo8Bit(this.G);
+            byte b = ImageMaths.DownScaleFrom16BitTo8Bit(this.B);
+            return new Bgr24(r, g, b);
+        }
+
         /// <inheritdoc />
         public override bool Equals(object obj) => obj is Rgba64 rgba64 && this.Equals(rgba64);
 
diff --git a/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs b/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
index 51f80e0e18..55a2dda7a9 100644
--- a/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/Rgba64Tests.cs
@@ -33,37 +33,50 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(Vector4.One, new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue).ToVector4());
         }
 
-        [Fact]
-        public void Rgba64_ToScaledVector4()
+        [Theory]
+        [InlineData(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue)]
+        [InlineData(0, 0, 0, 0)]
+        [InlineData(ushort.MaxValue/2, 100, 2222, 33333)]
+        public void Rgba64_ToScaledVector4(ushort r, ushort g, ushort b, ushort a)
         {
             // arrange
-            var short2 = new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue);
+            var short2 = new Rgba64(r, g, b, a);
+
+            float max = ushort.MaxValue;
+            float rr = r / max;
+            float gg = g / max;
+            float bb = b / max;
+            float aa = a / max;
 
             // act
             Vector4 actual = short2.ToScaledVector4();
 
             // assert
-            Assert.Equal(1, actual.X);
-            Assert.Equal(1, actual.Y);
-            Assert.Equal(1, actual.Z);
-            Assert.Equal(1, actual.W);
+            Assert.Equal(rr, actual.X);
+            Assert.Equal(gg, actual.Y);
+            Assert.Equal(bb, actual.Z);
+            Assert.Equal(aa, actual.W);
         }
 
-        [Fact]
-        public void Rgba64_FromScaledVector4()
+        [Theory]
+        [InlineData(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue)]
+        [InlineData(0, 0, 0, 0)]
+        [InlineData(ushort.MaxValue/2, 100, 2222, 33333)]
+        public void Rgba64_FromScaledVector4(ushort r, ushort g, ushort b, ushort a)
         {
             // arrange
-            var pixel = default(Rgba64);
-            var short4 = new Rgba64(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, ushort.MaxValue);
-            const ulong expected = 0xFFFFFFFFFFFFFFFF;
-
+            
+            var source = new Rgba64(r, g, b, a);
+            
             // act 
-            Vector4 scaled = short4.ToScaledVector4();
-            pixel.FromScaledVector4(scaled);
-            ulong actual = pixel.PackedValue;
+            Vector4 scaled = source.ToScaledVector4();
+
 
+            Rgba64 actual = default;
+            actual.FromScaledVector4(scaled);
+            
             // assert
-            Assert.Equal(expected, actual);
+            Assert.Equal(source, actual);
         }
 
         [Fact]
@@ -91,6 +104,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             // assert
             Assert.Equal(expected, actual);
         }
+        
 
         [Fact]
         public void Rgba64_FromBgra5551()
@@ -108,5 +122,172 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
             Assert.Equal(expected, rgba.B);
             Assert.Equal(expected, rgba.A);
         }
+
+        [Fact]
+        public void Equality_WhenTrue()
+        {
+            Rgba64 c1 = new Rgba64(100, 2000, 3000, 40000);
+            Rgba64 c2 = new Rgba64(100, 2000, 3000, 40000);
+            
+            Assert.True(c1.Equals(c2));
+            Assert.True(c1.GetHashCode() == c2.GetHashCode());
+        }
+        
+        [Fact]
+        public void Equality_WhenFalse()
+        {
+            Rgba64 c1 = new Rgba64(100, 2000, 3000, 40000);
+            Rgba64 c2 = new Rgba64(101, 2000, 3000, 40000);
+            Rgba64 c3 = new Rgba64(100, 2000, 3000, 40001);
+            
+            Assert.False(c1.Equals(c2));
+            Assert.False(c2.Equals(c3));
+            Assert.False(c3.Equals(c1));
+        }
+
+        [Fact]
+        public void Rgba64_FromRgba32()
+        {
+            var source = new Rgba32(20, 38, 76, 115);
+            var expected = new Rgba64(5140, 9766, 19532, 29555);
+
+            Rgba64 actual = default;
+            actual.FromRgba32(source);
+            
+            Assert.Equal(expected, actual);
+        }
+
+        [Fact]
+        public void ConstructFrom_Rgba32()
+        {
+            var expected = new Rgba64(5140, 9766, 19532, 29555);
+            var source = new Rgba32(20, 38, 76, 115);
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ConstructFrom_Bgra32()
+        {
+            var expected = new Rgba64(5140, 9766, 19532, 29555);
+            var source = new Bgra32(20, 38, 76, 115);
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ConstructFrom_Argb32()
+        {
+            var expected = new Rgba64(5140, 9766, 19532, 29555);
+            var source = new Argb32(20, 38, 76, 115);
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ConstructFrom_Rgb24()
+        {
+            var expected = new Rgba64(5140, 9766, 19532, ushort.MaxValue);
+            var source = new Rgb24(20, 38, 76);
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ConstructFrom_Bgr24()
+        {
+            var expected = new Rgba64(5140, 9766, 19532, ushort.MaxValue);
+            var source = new Bgr24(20, 38, 76);
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ConstructFrom_Vector4()
+        {
+            Vector4 source = new Vector4(0f, 0.2f, 0.5f, 1f);
+            Rgba64 expected = default;
+            expected.FromScaledVector4(source);
+            
+            Rgba64 actual = new Rgba64(source);
+            
+            Assert.Equal(expected, actual);
+        }
+
+        
+        [Fact]
+        public void ToRgba32_Retval()
+        {
+            // arrange
+            var source = new Rgba64(5140, 9766, 19532, 29555);
+            var expected = new Rgba32(20, 38, 76, 115);
+            
+            // act
+            var actual = source.ToRgba32();
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ToBgra32_Retval()
+        {
+            // arrange
+            var source = new Rgba64(5140, 9766, 19532, 29555);
+            var expected = new Bgra32(20, 38, 76, 115);
+            
+            // act
+            var actual = source.ToBgra32();
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ToArgb32_Retval()
+        {
+            // arrange
+            var source = new Rgba64(5140, 9766, 19532, 29555);
+            var expected = new Argb32(20, 38, 76, 115);
+            
+            // act
+            var actual = source.ToArgb32();
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ToRgb24_Retval()
+        {
+            // arrange
+            var source = new Rgba64(5140, 9766, 19532, 29555);
+            var expected = new Rgb24(20, 38, 76);
+            
+            // act
+            var actual = source.ToRgb24();
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
+        
+        [Fact]
+        public void ToBgr24_Retval()
+        {
+            // arrange
+            var source = new Rgba64(5140, 9766, 19532, 29555);
+            var expected = new Bgr24(20, 38, 76);
+            
+            // act
+            var actual = source.ToBgr24();
+
+            // assert
+            Assert.Equal(expected, actual);
+        }
     }
 }

From 2e53d72c4911e092c4e262b0cf9131ea4b5cf81e Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 6 May 2019 00:41:19 +0200
Subject: [PATCH 142/223] basic Color methods

---
 src/ImageSharp/Color.cs              |  51 +++++-
 tests/ImageSharp.Tests/ColorTests.cs | 245 +++++++++++++++++++++++++++
 2 files changed, 292 insertions(+), 4 deletions(-)

diff --git a/src/ImageSharp/Color.cs b/src/ImageSharp/Color.cs
index 4f6cab97bb..70c721060a 100644
--- a/src/ImageSharp/Color.cs
+++ b/src/ImageSharp/Color.cs
@@ -7,9 +7,9 @@ using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
-    public struct Color
+    public readonly struct Color
     {
-        private Rgba64 data;
+        private readonly Rgba64 data;
 
         public Color(Rgba64 pixel)
         {
@@ -21,12 +21,55 @@ namespace SixLabors.ImageSharp
             this.data = new Rgba64(pixel);
         }
 
+        public Color(Argb32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Bgra32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Rgb24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Bgr24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
         public Color(Vector4 vector)
         {
-            this.data = default;
-            this.data.FromVector4(vector);
+            this.data = new Rgba64(vector);
         }
 
+        public static implicit operator Color(Rgba64 source) => new Color(source);
+
+        public static implicit operator Color(Rgba32 source) => new Color(source);
+
+        public static implicit operator Color(Bgra32 source) => new Color(source);
+
+        public static implicit operator Color(Argb32 source) => new Color(source);
+
+        public static implicit operator Color(Rgb24 source) => new Color(source);
+
+        public static implicit operator Color(Bgr24 source) => new Color(source);
+
+        public static implicit operator Rgba64(Color color) => color.data;
+
+        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
+
+        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
+
+        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
+
+        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
+
+        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
+
         public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
 
         public TPixel ToPixel<TPixel>()
diff --git a/tests/ImageSharp.Tests/ColorTests.cs b/tests/ImageSharp.Tests/ColorTests.cs
index 4142066bc8..a1eaf9fae3 100644
--- a/tests/ImageSharp.Tests/ColorTests.cs
+++ b/tests/ImageSharp.Tests/ColorTests.cs
@@ -1,10 +1,255 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
 namespace SixLabors.ImageSharp.Tests
 {
     public class ColorTests
     {
+        public class ConstructFrom
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba64 data = color.ToPixel<Rgba64>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba32 data = color.ToPixel<Rgba32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Argb32 data = color.ToPixel<Argb32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgra32 data = color.ToPixel<Bgra32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgb24 data = color.ToPixel<Rgb24>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgr24 data = color.ToPixel<Bgr24>();
+                Assert.Equal(source, data);
+            }
+        }
         
+        public class Cast
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgba64 data = color.ToPixel<Rgba64>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgba32 data = color.ToPixel<Rgba32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Argb32 data = color.ToPixel<Argb32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Bgra32 data = color.ToPixel<Bgra32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgb24 data = color.ToPixel<Rgb24>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Bgr24 data = color.ToPixel<Bgr24>();
+                Assert.Equal(source, data);
+            }
+        }
+        
+        public class CastTo
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba64 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Argb32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgra32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgb24 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgr24 data = color;
+                Assert.Equal(source, data);
+            }
+        }
     }
 }
\ No newline at end of file

From e72b7172dd92cb5127c234943c0b85e9882ce4d1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 6 May 2019 01:12:41 +0200
Subject: [PATCH 143/223] Pixel-agnostic Binarization processors

---
 src/ImageSharp/Color.cs                       |   2 +-
 .../Processing/BinaryDiffuseExtensions.cs     |  47 +-
 .../Processing/BinaryDitherExtensions.cs      |  40 +-
 .../Processing/BinaryThresholdExtensions.cs   |  49 +-
 .../BinaryErrorDiffusionProcessor.cs          |  68 +-
 .../BinaryErrorDiffusionProcessor{TPixel}.cs  |  77 ++
 .../BinaryOrderedDitherProcessor.cs           |  67 +-
 .../BinaryOrderedDitherProcessor{TPixel}.cs   |  75 ++
 .../Binarization/BinaryThresholdProcessor.cs  |  63 +-
 .../BinaryThresholdProcessor{TPixel}.cs       |  70 ++
 .../EdgeDetector2DProcessor{TPixel}.cs        |   2 +-
 .../EdgeDetectorCompassProcessor{TPixel}.cs   |   2 +-
 .../EdgeDetectorProcessor{TPixel}.cs          |   2 +-
 .../Processors/Convolution/SobelProcessor.cs  |   8 -
 .../Filters/GrayscaleBt709Processor.cs        |   8 -
 .../Processors/ImageProcessorExtensions.cs    |  15 +
 .../EntropyCropProcessor{TPixel}.cs           |   4 +-
 .../Source/ImageSharp/Color.NamedColors.cs    | 717 ++++++++++++++++++
 .../Binarization/BinaryDitherTest.cs          |  54 +-
 .../Binarization/BinaryThresholdTest.cs       |  28 +-
 20 files changed, 1114 insertions(+), 284 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs

diff --git a/src/ImageSharp/Color.cs b/src/ImageSharp/Color.cs
index 70c721060a..6dae76c34d 100644
--- a/src/ImageSharp/Color.cs
+++ b/src/ImageSharp/Color.cs
@@ -7,7 +7,7 @@ using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
-    public readonly struct Color
+    public readonly partial struct Color
     {
         private readonly Rgba64 data;
 
diff --git a/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs b/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
index 487b64e1c4..7976daf25e 100644
--- a/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Binarization;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 using SixLabors.Primitives;
@@ -9,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines extension methods to apply binary diffusion on an <see cref="Image{TPixel}"/>
+    /// Defines extension methods to apply binary diffusion on an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class BinaryDiffuseExtensions
@@ -17,19 +16,19 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Dithers the image reducing it to two colors using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold));
+        public static IImageProcessingContext BinaryDiffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold) =>
+            source.ApplyProcessor(new BinaryErrorDiffusionProcessor(diffuser, threshold));
 
         /// <summary>
         /// Dithers the image reducing it to two colors using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
@@ -37,28 +36,33 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold), rectangle);
+        public static IImageProcessingContext BinaryDiffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BinaryErrorDiffusionProcessor(diffuser, threshold), rectangle);
 
         /// <summary>
         /// Dithers the image reducing it to two colors using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel upperColor, TPixel lowerColor)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold, upperColor, lowerColor));
+        public static IImageProcessingContext BinaryDiffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            Color upperColor,
+            Color lowerColor) =>
+            source.ApplyProcessor(new BinaryErrorDiffusionProcessor(diffuser, threshold, upperColor, lowerColor));
 
         /// <summary>
         /// Dithers the image reducing it to two colors using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
@@ -68,8 +72,15 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDiffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryErrorDiffusionProcessor<TPixel>(diffuser, threshold, upperColor, lowerColor), rectangle);
+        public static IImageProcessingContext BinaryDiffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            Color upperColor,
+            Color lowerColor,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(
+                new BinaryErrorDiffusionProcessor(diffuser, threshold, upperColor, lowerColor),
+                rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/BinaryDitherExtensions.cs b/src/ImageSharp/Processing/BinaryDitherExtensions.cs
index d8843dafac..b1e3d562ed 100644
--- a/src/ImageSharp/Processing/BinaryDitherExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryDitherExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Binarization;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 using SixLabors.Primitives;
@@ -9,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines extensions to apply binary dithering on an <see cref="Image{TPixel}"/>
+    /// Defines extensions to apply binary dithering on an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class BinaryDitherExtensions
@@ -17,45 +16,46 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Dithers the image reducing it to two colors using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither));
+        public static IImageProcessingContext
+            BinaryDither(this IImageProcessingContext source, IOrderedDither dither) =>
+            source.ApplyProcessor(new BinaryOrderedDitherProcessor(dither));
 
         /// <summary>
         /// Dithers the image reducing it to two colors using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel upperColor, TPixel lowerColor)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither, upperColor, lowerColor));
+        public static IImageProcessingContext BinaryDither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            Color upperColor,
+            Color lowerColor) =>
+            source.ApplyProcessor(new BinaryOrderedDitherProcessor(dither, upperColor, lowerColor));
 
         /// <summary>
         /// Dithers the image reducing it to two colors using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither), rectangle);
+        public static IImageProcessingContext BinaryDither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BinaryOrderedDitherProcessor(dither), rectangle);
 
         /// <summary>
         /// Dithers the image reducing it to two colors using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
@@ -64,8 +64,12 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryDither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryOrderedDitherProcessor<TPixel>(dither, upperColor, lowerColor), rectangle);
+        public static IImageProcessingContext BinaryDither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            Color upperColor,
+            Color lowerColor,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BinaryOrderedDitherProcessor(dither, upperColor, lowerColor), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/BinaryThresholdExtensions.cs b/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
index aecb784848..35aa681e33 100644
--- a/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
+++ b/src/ImageSharp/Processing/BinaryThresholdExtensions.cs
@@ -1,14 +1,13 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Binarization;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines extension methods to apply binary thresholding on an <see cref="Image{TPixel}"/>
+    /// Defines extension methods to apply binary thresholding on an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class BinaryThresholdExtensions
@@ -16,45 +15,45 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies binarization to the image splitting the pixels at the given threshold.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BinaryThreshold(this IImageProcessingContext source, float threshold) =>
+            source.ApplyProcessor(new BinaryThresholdProcessor(threshold));
 
         /// <summary>
         /// Applies binarization to the image splitting the pixels at the given threshold.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BinaryThreshold(
+            this IImageProcessingContext source,
+            float threshold,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BinaryThresholdProcessor(threshold), rectangle);
 
         /// <summary>
         /// Applies binarization to the image splitting the pixels at the given threshold.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, TPixel upperColor, TPixel lowerColor)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold, upperColor, lowerColor));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BinaryThreshold(
+            this IImageProcessingContext source,
+            float threshold,
+            Color upperColor,
+            Color lowerColor) =>
+            source.ApplyProcessor(new BinaryThresholdProcessor(threshold, upperColor, lowerColor));
 
         /// <summary>
         /// Applies binarization to the image splitting the pixels at the given threshold.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
@@ -62,9 +61,13 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> BinaryThreshold<TPixel>(this IImageProcessingContext<TPixel> source, float threshold, TPixel upperColor, TPixel lowerColor, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BinaryThresholdProcessor<TPixel>(threshold, upperColor, lowerColor), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BinaryThreshold(
+            this IImageProcessingContext source,
+            float threshold,
+            Color upperColor,
+            Color lowerColor,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BinaryThresholdProcessor(threshold, upperColor, lowerColor), rectangle);
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor.cs
index 32cc2f434b..8129836641 100644
--- a/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor.cs
@@ -2,22 +2,19 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.Advanced;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Binarization
 {
     /// <summary>
     /// Performs binary threshold filtering against an image using error diffusion.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BinaryErrorDiffusionProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class BinaryErrorDiffusionProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         public BinaryErrorDiffusionProcessor(IErrorDiffuser diffuser)
@@ -26,23 +23,23 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         public BinaryErrorDiffusionProcessor(IErrorDiffuser diffuser, float threshold)
-            : this(diffuser, threshold, NamedColors<TPixel>.White, NamedColors<TPixel>.Black)
+            : this(diffuser, threshold, Color.White, Color.Black)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryErrorDiffusionProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold.</param>
-        public BinaryErrorDiffusionProcessor(IErrorDiffuser diffuser, float threshold, TPixel upperColor, TPixel lowerColor)
+        public BinaryErrorDiffusionProcessor(IErrorDiffuser diffuser, float threshold, Color upperColor, Color lowerColor)
         {
             Guard.NotNull(diffuser, nameof(diffuser));
             Guard.MustBeBetweenOrEqualTo(threshold, 0, 1, nameof(threshold));
@@ -66,57 +63,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
         /// <summary>
         /// Gets the color to use for pixels that are above the threshold.
         /// </summary>
-        public TPixel UpperColor { get; }
+        public Color UpperColor { get; }
 
         /// <summary>
         /// Gets the color to use for pixels that fall below the threshold.
         /// </summary>
-        public TPixel LowerColor { get; }
+        public Color LowerColor { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            byte threshold = (byte)MathF.Round(this.Threshold * 255F);
-            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
-
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startY = interest.Y;
-            int endY = interest.Bottom;
-            int startX = interest.X;
-            int endX = interest.Right;
-
-            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
-            TPixel sourcePixel = source[startX, startY];
-            TPixel previousPixel = sourcePixel;
-            Rgba32 rgba = default;
-            sourcePixel.ToRgba32(ref rgba);
-
-            // Convert to grayscale using ITU-R Recommendation BT.709 if required
-            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-            for (int y = startY; y < endY; y++)
-            {
-                Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                for (int x = startX; x < endX; x++)
-                {
-                    sourcePixel = row[x];
-
-                    // Check if this is the same as the last pixel. If so use that value
-                    // rather than calculating it again. This is an inexpensive optimization.
-                    if (!previousPixel.Equals(sourcePixel))
-                    {
-                        sourcePixel.ToRgba32(ref rgba);
-                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-                        // Setup the previous pointer
-                        previousPixel = sourcePixel;
-                    }
-
-                    TPixel transformedPixel = luminance >= threshold ? this.UpperColor : this.LowerColor;
-                    this.Diffuser.Dither(source, sourcePixel, transformedPixel, x, y, startX, startY, endX, endY);
-                }
-            }
+            return new BinaryErrorDiffusionProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor{TPixel}.cs
new file mode 100644
index 0000000000..e3828aeb60
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryErrorDiffusionProcessor{TPixel}.cs
@@ -0,0 +1,77 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Dithering;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Binarization
+{
+    /// <summary>
+    /// Performs binary threshold filtering against an image using error diffusion.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class BinaryErrorDiffusionProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly BinaryErrorDiffusionProcessor definition;
+
+        public BinaryErrorDiffusionProcessor(BinaryErrorDiffusionProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            TPixel upperColor = this.definition.UpperColor.ToPixel<TPixel>();
+            TPixel lowerColor = this.definition.LowerColor.ToPixel<TPixel>();
+            IErrorDiffuser diffuser = this.definition.Diffuser;
+
+            byte threshold = (byte)MathF.Round(this.definition.Threshold * 255F);
+            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
+
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startY = interest.Y;
+            int endY = interest.Bottom;
+            int startX = interest.X;
+            int endX = interest.Right;
+
+            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
+            TPixel sourcePixel = source[startX, startY];
+            TPixel previousPixel = sourcePixel;
+            Rgba32 rgba = default;
+            sourcePixel.ToRgba32(ref rgba);
+
+            // Convert to grayscale using ITU-R Recommendation BT.709 if required
+            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+            for (int y = startY; y < endY; y++)
+            {
+                Span<TPixel> row = source.GetPixelRowSpan(y);
+
+                for (int x = startX; x < endX; x++)
+                {
+                    sourcePixel = row[x];
+
+                    // Check if this is the same as the last pixel. If so use that value
+                    // rather than calculating it again. This is an inexpensive optimization.
+                    if (!previousPixel.Equals(sourcePixel))
+                    {
+                        sourcePixel.ToRgba32(ref rgba);
+                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+                        // Setup the previous pointer
+                        previousPixel = sourcePixel;
+                    }
+
+                    TPixel transformedPixel = luminance >= threshold ? upperColor : lowerColor;
+                    diffuser.Dither(source, sourcePixel, transformedPixel, x, y, startX, startY, endX, endY);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
index cfdaf107c3..99c57171cf 100644
--- a/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
@@ -2,36 +2,30 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.Advanced;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Binarization
 {
-    /// <summary>
-    /// Performs binary threshold filtering against an image using ordered dithering.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BinaryOrderedDitherProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class BinaryOrderedDitherProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryOrderedDitherProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryOrderedDitherProcessor"/> class.
         /// </summary>
         /// <param name="dither">The ordered ditherer.</param>
         public BinaryOrderedDitherProcessor(IOrderedDither dither)
-            : this(dither, NamedColors<TPixel>.White, NamedColors<TPixel>.Black)
+            : this(dither, Color.White, Color.Black)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryOrderedDitherProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryOrderedDitherProcessor"/> class.
         /// </summary>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold.</param>
-        public BinaryOrderedDitherProcessor(IOrderedDither dither, TPixel upperColor, TPixel lowerColor)
+        public BinaryOrderedDitherProcessor(IOrderedDither dither, Color upperColor, Color lowerColor)
         {
             this.Dither = dither ?? throw new ArgumentNullException(nameof(dither));
             this.UpperColor = upperColor;
@@ -46,55 +40,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
         /// <summary>
         /// Gets the color to use for pixels that are above the threshold.
         /// </summary>
-        public TPixel UpperColor { get; }
+        public Color UpperColor { get; }
 
         /// <summary>
         /// Gets the color to use for pixels that fall below the threshold.
         /// </summary>
-        public TPixel LowerColor { get; }
+        public Color LowerColor { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
-
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startY = interest.Y;
-            int endY = interest.Bottom;
-            int startX = interest.X;
-            int endX = interest.Right;
-
-            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
-            TPixel sourcePixel = source[startX, startY];
-            TPixel previousPixel = sourcePixel;
-            Rgba32 rgba = default;
-            sourcePixel.ToRgba32(ref rgba);
-
-            // Convert to grayscale using ITU-R Recommendation BT.709 if required
-            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-            for (int y = startY; y < endY; y++)
-            {
-                Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                for (int x = startX; x < endX; x++)
-                {
-                    sourcePixel = row[x];
-
-                    // Check if this is the same as the last pixel. If so use that value
-                    // rather than calculating it again. This is an inexpensive optimization.
-                    if (!previousPixel.Equals(sourcePixel))
-                    {
-                        sourcePixel.ToRgba32(ref rgba);
-                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-                        // Setup the previous pointer
-                        previousPixel = sourcePixel;
-                    }
-
-                    this.Dither.Dither(source, sourcePixel, this.UpperColor, this.LowerColor, luminance, x, y);
-                }
-            }
+            return new BinaryOrderedDitherProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor{TPixel}.cs
new file mode 100644
index 0000000000..b3d174dfbe
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor{TPixel}.cs
@@ -0,0 +1,75 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Dithering;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Binarization
+{
+    /// <summary>
+    /// Performs binary threshold filtering against an image using ordered dithering.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class BinaryOrderedDitherProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly BinaryOrderedDitherProcessor definition;
+
+        public BinaryOrderedDitherProcessor(BinaryOrderedDitherProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            IOrderedDither dither = this.definition.Dither;
+            TPixel upperColor = this.definition.UpperColor.ToPixel<TPixel>();
+            TPixel lowerColor = this.definition.LowerColor.ToPixel<TPixel>();
+
+            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
+
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startY = interest.Y;
+            int endY = interest.Bottom;
+            int startX = interest.X;
+            int endX = interest.Right;
+
+            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
+            TPixel sourcePixel = source[startX, startY];
+            TPixel previousPixel = sourcePixel;
+            Rgba32 rgba = default;
+            sourcePixel.ToRgba32(ref rgba);
+
+            // Convert to grayscale using ITU-R Recommendation BT.709 if required
+            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+            for (int y = startY; y < endY; y++)
+            {
+                Span<TPixel> row = source.GetPixelRowSpan(y);
+
+                for (int x = startX; x < endX; x++)
+                {
+                    sourcePixel = row[x];
+
+                    // Check if this is the same as the last pixel. If so use that value
+                    // rather than calculating it again. This is an inexpensive optimization.
+                    if (!previousPixel.Equals(sourcePixel))
+                    {
+                        sourcePixel.ToRgba32(ref rgba);
+                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+                        // Setup the previous pointer
+                        previousPixel = sourcePixel;
+                    }
+
+                    dither.Dither(source, sourcePixel, upperColor, lowerColor, luminance, x, y);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
index 67dcfc7f1b..50086936cd 100644
--- a/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
@@ -3,36 +3,31 @@
 
 using System;
 
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Binarization
 {
     /// <summary>
     /// Performs simple binary threshold filtering against an image.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BinaryThresholdProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class BinaryThresholdProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryThresholdProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryThresholdProcessor"/> class.
         /// </summary>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         public BinaryThresholdProcessor(float threshold)
-            : this(threshold, NamedColors<TPixel>.White, NamedColors<TPixel>.Black)
+            : this(threshold, Color.White, Color.Black)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BinaryThresholdProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BinaryThresholdProcessor"/> class.
         /// </summary>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold.</param>
-        public BinaryThresholdProcessor(float threshold, TPixel upperColor, TPixel lowerColor)
+        public BinaryThresholdProcessor(float threshold, Color upperColor, Color lowerColor)
         {
             Guard.MustBeBetweenOrEqualTo(threshold, 0, 1, nameof(threshold));
             this.Threshold = threshold;
@@ -48,54 +43,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
         /// <summary>
         /// Gets or sets the color to use for pixels that are above the threshold.
         /// </summary>
-        public TPixel UpperColor { get; set; }
+        public Color UpperColor { get; }
 
         /// <summary>
         /// Gets or sets the color to use for pixels that fall below the threshold.
         /// </summary>
-        public TPixel LowerColor { get; set; }
+        public Color LowerColor { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(
-            ImageFrame<TPixel> source,
-            Rectangle sourceRectangle,
-            Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            byte threshold = (byte)MathF.Round(this.Threshold * 255F);
-            TPixel upper = this.UpperColor;
-            TPixel lower = this.LowerColor;
-
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startY = interest.Y;
-            int endY = interest.Bottom;
-            int startX = interest.X;
-            int endX = interest.Right;
-
-            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
-
-            var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
-
-            ParallelHelper.IterateRows(
-                workingRect,
-                configuration,
-                rows =>
-                    {
-                        Rgba32 rgba = default;
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                            for (int x = startX; x < endX; x++)
-                            {
-                                ref TPixel color = ref row[x];
-                                color.ToRgba32(ref rgba);
-
-                                // Convert to grayscale using ITU-R Recommendation BT.709 if required
-                                byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-                                color = luminance >= threshold ? upper : lower;
-                            }
-                        }
-                    });
+            return new BinaryThresholdProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs
new file mode 100644
index 0000000000..0d90d3647d
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs
@@ -0,0 +1,70 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Binarization
+{
+    /// <summary>
+    /// Performs simple binary threshold filtering against an image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class BinaryThresholdProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly BinaryThresholdProcessor definition;
+
+        public BinaryThresholdProcessor(BinaryThresholdProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            byte threshold = (byte)MathF.Round(this.definition.Threshold * 255F);
+            TPixel upper = this.definition.UpperColor.ToPixel<TPixel>();
+            TPixel lower = this.definition.LowerColor.ToPixel<TPixel>();
+
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startY = interest.Y;
+            int endY = interest.Bottom;
+            int startX = interest.X;
+            int endX = interest.Right;
+
+            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
+
+            var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
+
+            ParallelHelper.IterateRows(
+                workingRect,
+                configuration,
+                rows =>
+                    {
+                        Rgba32 rgba = default;
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixel> row = source.GetPixelRowSpan(y);
+
+                            for (int x = startX; x < endX; x++)
+                            {
+                                ref TPixel color = ref row[x];
+                                color.ToRgba32(ref rgba);
+
+                                // Convert to grayscale using ITU-R Recommendation BT.709 if required
+                                byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+                                color = luminance >= threshold ? upper : lower;
+                            }
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs
index 5daf14fc32..f6771288fe 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetector2DProcessor{TPixel}.cs
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).Apply(source, sourceRectangle, configuration);
             }
         }
     }
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs
index 227003195d..5995ac844f 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorCompassProcessor{TPixel}.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).Apply(source, sourceRectangle, configuration);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
index 026313cc12..041c548032 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/EdgeDetectorProcessor{TPixel}.cs
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             if (this.Grayscale)
             {
-                new GrayscaleBt709Processor(1F).ApplyToFrame(source, sourceRectangle, configuration);
+                new GrayscaleBt709Processor(1F).Apply(source, sourceRectangle, configuration);
             }
         }
 
diff --git a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
index bc4339e052..3d5d1e7bf1 100644
--- a/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Convolution/SobelProcessor.cs
@@ -26,13 +26,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Convolution
         {
             return new EdgeDetector2DProcessor<TPixel>(SobelKernels.SobelX, SobelKernels.SobelY, this.Grayscale);
         }
-
-        // TODO: Move this to an appropriate extension method if possible.
-        internal void ApplyToFrame<TPixel>(ImageFrame<TPixel> frame, Rectangle sourceRectangle, Configuration configuration)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            var processorImpl = new EdgeDetector2DProcessor<TPixel>(SobelKernels.SobelX, SobelKernels.SobelY, this.Grayscale);
-            processorImpl.Apply(frame, sourceRectangle, configuration);
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
index 2d7d2a1eaa..ae6d5f6f79 100644
--- a/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/GrayscaleBt709Processor.cs
@@ -25,13 +25,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// Gets the proportion of the conversion.
         /// </summary>
         public float Amount { get; }
-
-        // TODO: Move this to an appropriate extension method if possible.
-        internal void ApplyToFrame<TPixel>(ImageFrame<TPixel> frame, Rectangle sourceRectangle, Configuration configuration)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            var processorImpl = new FilterProcessor<TPixel>(new GrayscaleBt709Processor(1F));
-            processorImpl.Apply(frame, sourceRectangle, configuration);
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
index 762d761c6c..91b2b30d02 100644
--- a/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
+++ b/src/ImageSharp/Processing/Processors/ImageProcessorExtensions.cs
@@ -14,6 +14,21 @@ namespace SixLabors.ImageSharp.Processing.Processors
             source.AcceptVisitor(visitor);
         }
 
+        /// <summary>
+        /// Apply an <see cref="IImageProcessor"/> to a frame.
+        /// Only works from processors implemented by an <see cref="ImageProcessor{TPixel}"/> subclass.
+        /// </summary>
+        internal static void Apply<TPixel>(
+            this IImageProcessor processor,
+            ImageFrame<TPixel> frame,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var processorImpl = (ImageProcessor<TPixel>)processor.CreatePixelSpecificProcessor<TPixel>();
+            processorImpl.Apply(frame, sourceRectangle, configuration);
+        }
+
         private class ApplyVisitor : IImageVisitor
         {
             private readonly IImageProcessor processor;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
index eaeb6939ec..4bfeb25198 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/EntropyCropProcessor{TPixel}.cs
@@ -38,10 +38,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                 Configuration configuration = source.GetConfiguration();
 
                 // Detect the edges.
-                new SobelProcessor(false).ApplyToFrame(temp, sourceRectangle, configuration);
+                new SobelProcessor(false).Apply(temp, sourceRectangle, configuration);
 
                 // Apply threshold binarization filter.
-                new BinaryThresholdProcessor<TPixel>(this.definition.Threshold).Apply(temp, sourceRectangle, configuration);
+                new BinaryThresholdProcessor(this.definition.Threshold).Apply(temp, sourceRectangle, configuration);
 
                 // Search for the first white pixels
                 rectangle = ImageMaths.GetFilteredBoundingRectangle(temp, 0);
diff --git a/src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs b/src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs
new file mode 100644
index 0000000000..e00329d89a
--- /dev/null
+++ b/src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs
@@ -0,0 +1,717 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+namespace SixLabors.ImageSharp
+{
+    public readonly partial struct Color
+    {
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F0F8FF.
+        /// </summary>
+        public static readonly Color AliceBlue = FromRgba(240, 248, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FAEBD7.
+        /// </summary>
+        public static readonly Color AntiqueWhite = FromRgba(250, 235, 215, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00FFFF.
+        /// </summary>
+        public static readonly Color Aqua = FromRgba(0, 255, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #7FFFD4.
+        /// </summary>
+        public static readonly Color Aquamarine = FromRgba(127, 255, 212, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F0FFFF.
+        /// </summary>
+        public static readonly Color Azure = FromRgba(240, 255, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F5F5DC.
+        /// </summary>
+        public static readonly Color Beige = FromRgba(245, 245, 220, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFE4C4.
+        /// </summary>
+        public static readonly Color Bisque = FromRgba(255, 228, 196, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #000000.
+        /// </summary>
+        public static readonly Color Black = FromRgba(0, 0, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFEBCD.
+        /// </summary>
+        public static readonly Color BlanchedAlmond = FromRgba(255, 235, 205, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #0000FF.
+        /// </summary>
+        public static readonly Color Blue = FromRgba(0, 0, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #8A2BE2.
+        /// </summary>
+        public static readonly Color BlueViolet = FromRgba(138, 43, 226, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #A52A2A.
+        /// </summary>
+        public static readonly Color Brown = FromRgba(165, 42, 42, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DEB887.
+        /// </summary>
+        public static readonly Color BurlyWood = FromRgba(222, 184, 135, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #5F9EA0.
+        /// </summary>
+        public static readonly Color CadetBlue = FromRgba(95, 158, 160, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #7FFF00.
+        /// </summary>
+        public static readonly Color Chartreuse = FromRgba(127, 255, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #D2691E.
+        /// </summary>
+        public static readonly Color Chocolate = FromRgba(210, 105, 30, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF7F50.
+        /// </summary>
+        public static readonly Color Coral = FromRgba(255, 127, 80, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #6495ED.
+        /// </summary>
+        public static readonly Color CornflowerBlue = FromRgba(100, 149, 237, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFF8DC.
+        /// </summary>
+        public static readonly Color Cornsilk = FromRgba(255, 248, 220, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DC143C.
+        /// </summary>
+        public static readonly Color Crimson = FromRgba(220, 20, 60, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00FFFF.
+        /// </summary>
+        public static readonly Color Cyan = FromRgba(0, 255, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00008B.
+        /// </summary>
+        public static readonly Color DarkBlue = FromRgba(0, 0, 139, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #008B8B.
+        /// </summary>
+        public static readonly Color DarkCyan = FromRgba(0, 139, 139, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #B8860B.
+        /// </summary>
+        public static readonly Color DarkGoldenrod = FromRgba(184, 134, 11, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #A9A9A9.
+        /// </summary>
+        public static readonly Color DarkGray = FromRgba(169, 169, 169, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #006400.
+        /// </summary>
+        public static readonly Color DarkGreen = FromRgba(0, 100, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #BDB76B.
+        /// </summary>
+        public static readonly Color DarkKhaki = FromRgba(189, 183, 107, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #8B008B.
+        /// </summary>
+        public static readonly Color DarkMagenta = FromRgba(139, 0, 139, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #556B2F.
+        /// </summary>
+        public static readonly Color DarkOliveGreen = FromRgba(85, 107, 47, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF8C00.
+        /// </summary>
+        public static readonly Color DarkOrange = FromRgba(255, 140, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #9932CC.
+        /// </summary>
+        public static readonly Color DarkOrchid = FromRgba(153, 50, 204, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #8B0000.
+        /// </summary>
+        public static readonly Color DarkRed = FromRgba(139, 0, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #E9967A.
+        /// </summary>
+        public static readonly Color DarkSalmon = FromRgba(233, 150, 122, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #8FBC8B.
+        /// </summary>
+        public static readonly Color DarkSeaGreen = FromRgba(143, 188, 139, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #483D8B.
+        /// </summary>
+        public static readonly Color DarkSlateBlue = FromRgba(72, 61, 139, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #2F4F4F.
+        /// </summary>
+        public static readonly Color DarkSlateGray = FromRgba(47, 79, 79, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00CED1.
+        /// </summary>
+        public static readonly Color DarkTurquoise = FromRgba(0, 206, 209, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #9400D3.
+        /// </summary>
+        public static readonly Color DarkViolet = FromRgba(148, 0, 211, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF1493.
+        /// </summary>
+        public static readonly Color DeepPink = FromRgba(255, 20, 147, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00BFFF.
+        /// </summary>
+        public static readonly Color DeepSkyBlue = FromRgba(0, 191, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #696969.
+        /// </summary>
+        public static readonly Color DimGray = FromRgba(105, 105, 105, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #1E90FF.
+        /// </summary>
+        public static readonly Color DodgerBlue = FromRgba(30, 144, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #B22222.
+        /// </summary>
+        public static readonly Color Firebrick = FromRgba(178, 34, 34, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFAF0.
+        /// </summary>
+        public static readonly Color FloralWhite = FromRgba(255, 250, 240, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #228B22.
+        /// </summary>
+        public static readonly Color ForestGreen = FromRgba(34, 139, 34, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF00FF.
+        /// </summary>
+        public static readonly Color Fuchsia = FromRgba(255, 0, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DCDCDC.
+        /// </summary>
+        public static readonly Color Gainsboro = FromRgba(220, 220, 220, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F8F8FF.
+        /// </summary>
+        public static readonly Color GhostWhite = FromRgba(248, 248, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFD700.
+        /// </summary>
+        public static readonly Color Gold = FromRgba(255, 215, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DAA520.
+        /// </summary>
+        public static readonly Color Goldenrod = FromRgba(218, 165, 32, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #808080.
+        /// </summary>
+        public static readonly Color Gray = FromRgba(128, 128, 128, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #008000.
+        /// </summary>
+        public static readonly Color Green = FromRgba(0, 128, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #ADFF2F.
+        /// </summary>
+        public static readonly Color GreenYellow = FromRgba(173, 255, 47, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F0FFF0.
+        /// </summary>
+        public static readonly Color Honeydew = FromRgba(240, 255, 240, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF69B4.
+        /// </summary>
+        public static readonly Color HotPink = FromRgba(255, 105, 180, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #CD5C5C.
+        /// </summary>
+        public static readonly Color IndianRed = FromRgba(205, 92, 92, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #4B0082.
+        /// </summary>
+        public static readonly Color Indigo = FromRgba(75, 0, 130, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFFF0.
+        /// </summary>
+        public static readonly Color Ivory = FromRgba(255, 255, 240, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F0E68C.
+        /// </summary>
+        public static readonly Color Khaki = FromRgba(240, 230, 140, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #E6E6FA.
+        /// </summary>
+        public static readonly Color Lavender = FromRgba(230, 230, 250, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFF0F5.
+        /// </summary>
+        public static readonly Color LavenderBlush = FromRgba(255, 240, 245, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #7CFC00.
+        /// </summary>
+        public static readonly Color LawnGreen = FromRgba(124, 252, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFACD.
+        /// </summary>
+        public static readonly Color LemonChiffon = FromRgba(255, 250, 205, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #ADD8E6.
+        /// </summary>
+        public static readonly Color LightBlue = FromRgba(173, 216, 230, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F08080.
+        /// </summary>
+        public static readonly Color LightCoral = FromRgba(240, 128, 128, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #E0FFFF.
+        /// </summary>
+        public static readonly Color LightCyan = FromRgba(224, 255, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FAFAD2.
+        /// </summary>
+        public static readonly Color LightGoldenrodYellow = FromRgba(250, 250, 210, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #D3D3D3.
+        /// </summary>
+        public static readonly Color LightGray = FromRgba(211, 211, 211, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #90EE90.
+        /// </summary>
+        public static readonly Color LightGreen = FromRgba(144, 238, 144, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFB6C1.
+        /// </summary>
+        public static readonly Color LightPink = FromRgba(255, 182, 193, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFA07A.
+        /// </summary>
+        public static readonly Color LightSalmon = FromRgba(255, 160, 122, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #20B2AA.
+        /// </summary>
+        public static readonly Color LightSeaGreen = FromRgba(32, 178, 170, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #87CEFA.
+        /// </summary>
+        public static readonly Color LightSkyBlue = FromRgba(135, 206, 250, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #778899.
+        /// </summary>
+        public static readonly Color LightSlateGray = FromRgba(119, 136, 153, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #B0C4DE.
+        /// </summary>
+        public static readonly Color LightSteelBlue = FromRgba(176, 196, 222, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFFE0.
+        /// </summary>
+        public static readonly Color LightYellow = FromRgba(255, 255, 224, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00FF00.
+        /// </summary>
+        public static readonly Color Lime = FromRgba(0, 255, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #32CD32.
+        /// </summary>
+        public static readonly Color LimeGreen = FromRgba(50, 205, 50, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FAF0E6.
+        /// </summary>
+        public static readonly Color Linen = FromRgba(250, 240, 230, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF00FF.
+        /// </summary>
+        public static readonly Color Magenta = FromRgba(255, 0, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #800000.
+        /// </summary>
+        public static readonly Color Maroon = FromRgba(128, 0, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #66CDAA.
+        /// </summary>
+        public static readonly Color MediumAquamarine = FromRgba(102, 205, 170, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #0000CD.
+        /// </summary>
+        public static readonly Color MediumBlue = FromRgba(0, 0, 205, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #BA55D3.
+        /// </summary>
+        public static readonly Color MediumOrchid = FromRgba(186, 85, 211, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #9370DB.
+        /// </summary>
+        public static readonly Color MediumPurple = FromRgba(147, 112, 219, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #3CB371.
+        /// </summary>
+        public static readonly Color MediumSeaGreen = FromRgba(60, 179, 113, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #7B68EE.
+        /// </summary>
+        public static readonly Color MediumSlateBlue = FromRgba(123, 104, 238, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00FA9A.
+        /// </summary>
+        public static readonly Color MediumSpringGreen = FromRgba(0, 250, 154, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #48D1CC.
+        /// </summary>
+        public static readonly Color MediumTurquoise = FromRgba(72, 209, 204, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #C71585.
+        /// </summary>
+        public static readonly Color MediumVioletRed = FromRgba(199, 21, 133, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #191970.
+        /// </summary>
+        public static readonly Color MidnightBlue = FromRgba(25, 25, 112, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F5FFFA.
+        /// </summary>
+        public static readonly Color MintCream = FromRgba(245, 255, 250, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFE4E1.
+        /// </summary>
+        public static readonly Color MistyRose = FromRgba(255, 228, 225, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFE4B5.
+        /// </summary>
+        public static readonly Color Moccasin = FromRgba(255, 228, 181, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFDEAD.
+        /// </summary>
+        public static readonly Color NavajoWhite = FromRgba(255, 222, 173, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #000080.
+        /// </summary>
+        public static readonly Color Navy = FromRgba(0, 0, 128, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FDF5E6.
+        /// </summary>
+        public static readonly Color OldLace = FromRgba(253, 245, 230, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #808000.
+        /// </summary>
+        public static readonly Color Olive = FromRgba(128, 128, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #6B8E23.
+        /// </summary>
+        public static readonly Color OliveDrab = FromRgba(107, 142, 35, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFA500.
+        /// </summary>
+        public static readonly Color Orange = FromRgba(255, 165, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF4500.
+        /// </summary>
+        public static readonly Color OrangeRed = FromRgba(255, 69, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DA70D6.
+        /// </summary>
+        public static readonly Color Orchid = FromRgba(218, 112, 214, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #EEE8AA.
+        /// </summary>
+        public static readonly Color PaleGoldenrod = FromRgba(238, 232, 170, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #98FB98.
+        /// </summary>
+        public static readonly Color PaleGreen = FromRgba(152, 251, 152, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #AFEEEE.
+        /// </summary>
+        public static readonly Color PaleTurquoise = FromRgba(175, 238, 238, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DB7093.
+        /// </summary>
+        public static readonly Color PaleVioletRed = FromRgba(219, 112, 147, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFEFD5.
+        /// </summary>
+        public static readonly Color PapayaWhip = FromRgba(255, 239, 213, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFDAB9.
+        /// </summary>
+        public static readonly Color PeachPuff = FromRgba(255, 218, 185, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #CD853F.
+        /// </summary>
+        public static readonly Color Peru = FromRgba(205, 133, 63, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFC0CB.
+        /// </summary>
+        public static readonly Color Pink = FromRgba(255, 192, 203, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #DDA0DD.
+        /// </summary>
+        public static readonly Color Plum = FromRgba(221, 160, 221, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #B0E0E6.
+        /// </summary>
+        public static readonly Color PowderBlue = FromRgba(176, 224, 230, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #800080.
+        /// </summary>
+        public static readonly Color Purple = FromRgba(128, 0, 128, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #663399.
+        /// </summary>
+        public static readonly Color RebeccaPurple = FromRgba(102, 51, 153, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF0000.
+        /// </summary>
+        public static readonly Color Red = FromRgba(255, 0, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #BC8F8F.
+        /// </summary>
+        public static readonly Color RosyBrown = FromRgba(188, 143, 143, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #4169E1.
+        /// </summary>
+        public static readonly Color RoyalBlue = FromRgba(65, 105, 225, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #8B4513.
+        /// </summary>
+        public static readonly Color SaddleBrown = FromRgba(139, 69, 19, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FA8072.
+        /// </summary>
+        public static readonly Color Salmon = FromRgba(250, 128, 114, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F4A460.
+        /// </summary>
+        public static readonly Color SandyBrown = FromRgba(244, 164, 96, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #2E8B57.
+        /// </summary>
+        public static readonly Color SeaGreen = FromRgba(46, 139, 87, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFF5EE.
+        /// </summary>
+        public static readonly Color SeaShell = FromRgba(255, 245, 238, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #A0522D.
+        /// </summary>
+        public static readonly Color Sienna = FromRgba(160, 82, 45, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #C0C0C0.
+        /// </summary>
+        public static readonly Color Silver = FromRgba(192, 192, 192, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #87CEEB.
+        /// </summary>
+        public static readonly Color SkyBlue = FromRgba(135, 206, 235, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #6A5ACD.
+        /// </summary>
+        public static readonly Color SlateBlue = FromRgba(106, 90, 205, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #708090.
+        /// </summary>
+        public static readonly Color SlateGray = FromRgba(112, 128, 144, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFAFA.
+        /// </summary>
+        public static readonly Color Snow = FromRgba(255, 250, 250, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #00FF7F.
+        /// </summary>
+        public static readonly Color SpringGreen = FromRgba(0, 255, 127, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #4682B4.
+        /// </summary>
+        public static readonly Color SteelBlue = FromRgba(70, 130, 180, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #D2B48C.
+        /// </summary>
+        public static readonly Color Tan = FromRgba(210, 180, 140, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #008080.
+        /// </summary>
+        public static readonly Color Teal = FromRgba(0, 128, 128, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #D8BFD8.
+        /// </summary>
+        public static readonly Color Thistle = FromRgba(216, 191, 216, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FF6347.
+        /// </summary>
+        public static readonly Color Tomato = FromRgba(255, 99, 71, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFFFF.
+        /// </summary>
+        public static readonly Color Transparent = FromRgba(255, 255, 255, 0);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #40E0D0.
+        /// </summary>
+        public static readonly Color Turquoise = FromRgba(64, 224, 208, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #EE82EE.
+        /// </summary>
+        public static readonly Color Violet = FromRgba(238, 130, 238, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F5DEB3.
+        /// </summary>
+        public static readonly Color Wheat = FromRgba(245, 222, 179, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFFFF.
+        /// </summary>
+        public static readonly Color White = FromRgba(255, 255, 255, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #F5F5F5.
+        /// </summary>
+        public static readonly Color WhiteSmoke = FromRgba(245, 245, 245, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #FFFF00.
+        /// </summary>
+        public static readonly Color Yellow = FromRgba(255, 255, 0, 255);
+
+        /// <summary>
+        /// Represents a <see paramref="Color"/> matching the W3C definition that has an hex value of #9ACD32.
+        /// </summary>
+        public static readonly Color YellowGreen = FromRgba(154, 205, 50, 255);
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Binarization/BinaryDitherTest.cs b/tests/ImageSharp.Tests/Processing/Binarization/BinaryDitherTest.cs
index 5f6e825f63..dcbf0ca038 100644
--- a/tests/ImageSharp.Tests/Processing/Binarization/BinaryDitherTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Binarization/BinaryDitherTest.cs
@@ -25,38 +25,38 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void BinaryDither_CorrectProcessor()
         {
             this.operations.BinaryDither(this.orderedDither);
-            BinaryOrderedDitherProcessor<Rgba32> p = this.Verify<BinaryOrderedDitherProcessor<Rgba32>>();
+            BinaryOrderedDitherProcessor p = this.Verify<BinaryOrderedDitherProcessor>();
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
 
         [Fact]
         public void BinaryDither_rect_CorrectProcessor()
         {
             this.operations.BinaryDither(this.orderedDither, this.rect);
-            BinaryOrderedDitherProcessor<Rgba32> p = this.Verify<BinaryOrderedDitherProcessor<Rgba32>>(this.rect);
+            BinaryOrderedDitherProcessor p = this.Verify<BinaryOrderedDitherProcessor>(this.rect);
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
         [Fact]
         public void BinaryDither_index_CorrectProcessor()
         {
-            this.operations.BinaryDither(this.orderedDither, NamedColors<Rgba32>.Yellow, NamedColors<Rgba32>.HotPink);
-            BinaryOrderedDitherProcessor<Rgba32> p = this.Verify<BinaryOrderedDitherProcessor<Rgba32>>();
+            this.operations.BinaryDither(this.orderedDither, Color.Yellow, Color.HotPink);
+            BinaryOrderedDitherProcessor p = this.Verify<BinaryOrderedDitherProcessor>();
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.Yellow, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.LowerColor);
+            Assert.Equal(Color.Yellow, p.UpperColor);
+            Assert.Equal(Color.HotPink, p.LowerColor);
         }
 
         [Fact]
         public void BinaryDither_index_rect_CorrectProcessor()
         {
-            this.operations.BinaryDither(this.orderedDither, NamedColors<Rgba32>.Yellow, NamedColors<Rgba32>.HotPink, this.rect);
-            BinaryOrderedDitherProcessor<Rgba32> p = this.Verify<BinaryOrderedDitherProcessor<Rgba32>>(this.rect);
+            this.operations.BinaryDither(this.orderedDither, Color.Yellow, Color.HotPink, this.rect);
+            BinaryOrderedDitherProcessor p = this.Verify<BinaryOrderedDitherProcessor>(this.rect);
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.LowerColor);
+            Assert.Equal(Color.HotPink, p.LowerColor);
         }
 
 
@@ -64,44 +64,44 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void BinaryDither_ErrorDiffuser_CorrectProcessor()
         {
             this.operations.BinaryDiffuse(this.errorDiffuser, .4F);
-            BinaryErrorDiffusionProcessor<Rgba32> p = this.Verify<BinaryErrorDiffusionProcessor<Rgba32>>();
+            BinaryErrorDiffusionProcessor p = this.Verify<BinaryErrorDiffusionProcessor>();
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.4F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
 
         [Fact]
         public void BinaryDither_ErrorDiffuser_rect_CorrectProcessor()
         {
             this.operations.BinaryDiffuse(this.errorDiffuser, .3F, this.rect);
-            BinaryErrorDiffusionProcessor<Rgba32> p = this.Verify<BinaryErrorDiffusionProcessor<Rgba32>>(this.rect);
+            BinaryErrorDiffusionProcessor p = this.Verify<BinaryErrorDiffusionProcessor>(this.rect);
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.3F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
 
         [Fact]
         public void BinaryDither_ErrorDiffuser_CorrectProcessorWithColors()
         {
-            this.operations.BinaryDiffuse(this.errorDiffuser, .5F, NamedColors<Rgba32>.HotPink, NamedColors<Rgba32>.Yellow);
-            BinaryErrorDiffusionProcessor<Rgba32> p = this.Verify<BinaryErrorDiffusionProcessor<Rgba32>>();
+            this.operations.BinaryDiffuse(this.errorDiffuser, .5F, Color.HotPink, Color.Yellow);
+            BinaryErrorDiffusionProcessor p = this.Verify<BinaryErrorDiffusionProcessor>();
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.5F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Yellow, p.LowerColor);
+            Assert.Equal(Color.HotPink, p.UpperColor);
+            Assert.Equal(Color.Yellow, p.LowerColor);
         }
 
         [Fact]
         public void BinaryDither_ErrorDiffuser_rect_CorrectProcessorWithColors()
         {
-            this.operations.BinaryDiffuse(this.errorDiffuser, .5F, NamedColors<Rgba32>.HotPink, NamedColors<Rgba32>.Yellow, this.rect);
-            BinaryErrorDiffusionProcessor<Rgba32> p = this.Verify<BinaryErrorDiffusionProcessor<Rgba32>>(this.rect);
+            this.operations.BinaryDiffuse(this.errorDiffuser, .5F, Color.HotPink, Color.Yellow, this.rect);
+            BinaryErrorDiffusionProcessor p = this.Verify<BinaryErrorDiffusionProcessor>(this.rect);
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.5F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Yellow, p.LowerColor);
+            Assert.Equal(Color.HotPink, p.UpperColor);
+            Assert.Equal(Color.Yellow, p.LowerColor);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Binarization/BinaryThresholdTest.cs b/tests/ImageSharp.Tests/Processing/Binarization/BinaryThresholdTest.cs
index 569c4ba217..f0fcba1815 100644
--- a/tests/ImageSharp.Tests/Processing/Binarization/BinaryThresholdTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Binarization/BinaryThresholdTest.cs
@@ -15,40 +15,40 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void BinaryThreshold_CorrectProcessor()
         {
             this.operations.BinaryThreshold(.23f);
-            BinaryThresholdProcessor<Rgba32> p = this.Verify<BinaryThresholdProcessor<Rgba32>>();
+            BinaryThresholdProcessor p = this.Verify<BinaryThresholdProcessor>();
             Assert.Equal(.23f, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
 
         [Fact]
         public void BinaryThreshold_rect_CorrectProcessor()
         {
             this.operations.BinaryThreshold(.93f, this.rect);
-            BinaryThresholdProcessor<Rgba32> p = this.Verify<BinaryThresholdProcessor<Rgba32>>(this.rect);
+            BinaryThresholdProcessor p = this.Verify<BinaryThresholdProcessor>(this.rect);
             Assert.Equal(.93f, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.White, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Black, p.LowerColor);
+            Assert.Equal(Color.White, p.UpperColor);
+            Assert.Equal(Color.Black, p.LowerColor);
         }
 
         [Fact]
         public void BinaryThreshold_CorrectProcessorWithUpperLower()
         {
-            this.operations.BinaryThreshold(.23f, NamedColors<Rgba32>.HotPink, NamedColors<Rgba32>.Yellow);
-            BinaryThresholdProcessor<Rgba32> p = this.Verify<BinaryThresholdProcessor<Rgba32>>();
+            this.operations.BinaryThreshold(.23f, Color.HotPink, Color.Yellow);
+            BinaryThresholdProcessor p = this.Verify<BinaryThresholdProcessor>();
             Assert.Equal(.23f, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Yellow, p.LowerColor);
+            Assert.Equal(Color.HotPink, p.UpperColor);
+            Assert.Equal(Color.Yellow, p.LowerColor);
         }
 
         [Fact]
         public void BinaryThreshold_rect_CorrectProcessorWithUpperLower()
         {
-            this.operations.BinaryThreshold(.93f, NamedColors<Rgba32>.HotPink, NamedColors<Rgba32>.Yellow, this.rect);
-            BinaryThresholdProcessor<Rgba32> p = this.Verify<BinaryThresholdProcessor<Rgba32>>(this.rect);
+            this.operations.BinaryThreshold(.93f, Color.HotPink, Color.Yellow, this.rect);
+            BinaryThresholdProcessor p = this.Verify<BinaryThresholdProcessor>(this.rect);
             Assert.Equal(.93f, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.HotPink, p.UpperColor);
-            Assert.Equal(NamedColors<Rgba32>.Yellow, p.LowerColor);
+            Assert.Equal(Color.HotPink, p.UpperColor);
+            Assert.Equal(Color.Yellow, p.LowerColor);
         }
     }
 }
\ No newline at end of file

From 422a78e9494c83496617227441ab1c0b0014c05e Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 6 May 2019 22:58:17 +0200
Subject: [PATCH 144/223] Implement WernerPalette and WebSafePalette for Color

---
 src/ImageSharp/Color.cs                       |  83 ------
 .../ImageSharp => Color}/Color.NamedColors.cs |   1 +
 src/ImageSharp/Color/Color.WebSafePalette.cs  | 163 +++++++++++
 src/ImageSharp/Color/Color.WernerPalette.cs   | 132 +++++++++
 src/ImageSharp/Color/Color.cs                 | 185 ++++++++++++
 src/ImageSharp/ImageSharp.csproj.DotSettings  |   1 +
 .../Color/ColorTests.CastFrom.cs              |  93 ++++++
 .../Color/ColorTests.CastTo.cs                |  93 ++++++
 .../Color/ColorTests.ConstructFrom.cs         |  93 ++++++
 tests/ImageSharp.Tests/Color/ColorTests.cs    |  97 ++++++
 .../Color/ReferencePalette.cs                 | 277 ++++++++++++++++++
 tests/ImageSharp.Tests/ColorTests.cs          | 255 ----------------
 12 files changed, 1135 insertions(+), 338 deletions(-)
 delete mode 100644 src/ImageSharp/Color.cs
 rename src/ImageSharp/{Source/ImageSharp => Color}/Color.NamedColors.cs (99%)
 create mode 100644 src/ImageSharp/Color/Color.WebSafePalette.cs
 create mode 100644 src/ImageSharp/Color/Color.WernerPalette.cs
 create mode 100644 src/ImageSharp/Color/Color.cs
 create mode 100644 tests/ImageSharp.Tests/Color/ColorTests.CastFrom.cs
 create mode 100644 tests/ImageSharp.Tests/Color/ColorTests.CastTo.cs
 create mode 100644 tests/ImageSharp.Tests/Color/ColorTests.ConstructFrom.cs
 create mode 100644 tests/ImageSharp.Tests/Color/ColorTests.cs
 create mode 100644 tests/ImageSharp.Tests/Color/ReferencePalette.cs
 delete mode 100644 tests/ImageSharp.Tests/ColorTests.cs

diff --git a/src/ImageSharp/Color.cs b/src/ImageSharp/Color.cs
deleted file mode 100644
index 6dae76c34d..0000000000
--- a/src/ImageSharp/Color.cs
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Numerics;
-
-using SixLabors.ImageSharp.PixelFormats;
-
-namespace SixLabors.ImageSharp
-{
-    public readonly partial struct Color
-    {
-        private readonly Rgba64 data;
-
-        public Color(Rgba64 pixel)
-        {
-            this.data = pixel;
-        }
-
-        public Color(Rgba32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Argb32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Bgra32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Rgb24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Bgr24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Vector4 vector)
-        {
-            this.data = new Rgba64(vector);
-        }
-
-        public static implicit operator Color(Rgba64 source) => new Color(source);
-
-        public static implicit operator Color(Rgba32 source) => new Color(source);
-
-        public static implicit operator Color(Bgra32 source) => new Color(source);
-
-        public static implicit operator Color(Argb32 source) => new Color(source);
-
-        public static implicit operator Color(Rgb24 source) => new Color(source);
-
-        public static implicit operator Color(Bgr24 source) => new Color(source);
-
-        public static implicit operator Rgba64(Color color) => color.data;
-
-        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
-
-        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
-
-        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
-
-        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
-
-        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
-
-        public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
-
-        public TPixel ToPixel<TPixel>()
-            where TPixel : struct, IPixel<TPixel>
-        {
-            TPixel pixel = default;
-            pixel.FromRgba64(this.data);
-            return pixel;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs b/src/ImageSharp/Color/Color.NamedColors.cs
similarity index 99%
rename from src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs
rename to src/ImageSharp/Color/Color.NamedColors.cs
index e00329d89a..a712f85dab 100644
--- a/src/ImageSharp/Source/ImageSharp/Color.NamedColors.cs
+++ b/src/ImageSharp/Color/Color.NamedColors.cs
@@ -1,5 +1,6 @@
 // // Copyright (c) Six Labors and contributors.
 // // Licensed under the Apache License, Version 2.0.
+
 namespace SixLabors.ImageSharp
 {
     public readonly partial struct Color
diff --git a/src/ImageSharp/Color/Color.WebSafePalette.cs b/src/ImageSharp/Color/Color.WebSafePalette.cs
new file mode 100644
index 0000000000..13720ec493
--- /dev/null
+++ b/src/ImageSharp/Color/Color.WebSafePalette.cs
@@ -0,0 +1,163 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+
+namespace SixLabors.ImageSharp
+{
+    public partial struct Color
+    {
+        private static readonly Lazy<Color[]> WebSafePaletteLazy = new Lazy<Color[]>(CreateWebSafePalette, true);
+
+        /// <summary>
+        /// Gets a collection of named, web safe, colors as defined in the CSS Color Module Level 4.
+        /// </summary>
+        public static ReadOnlySpan<Color> WebSafePalette => WebSafePaletteLazy.Value;
+
+        private static Color[] CreateWebSafePalette() => new[]
+        {
+            AliceBlue,
+            AntiqueWhite,
+            Aqua,
+            Aquamarine,
+            Azure,
+            Beige,
+            Bisque,
+            Black,
+            BlanchedAlmond,
+            Blue,
+            BlueViolet,
+            Brown,
+            BurlyWood,
+            CadetBlue,
+            Chartreuse,
+            Chocolate,
+            Coral,
+            CornflowerBlue,
+            Cornsilk,
+            Crimson,
+            Cyan,
+            DarkBlue,
+            DarkCyan,
+            DarkGoldenrod,
+            DarkGray,
+            DarkGreen,
+            DarkKhaki,
+            DarkMagenta,
+            DarkOliveGreen,
+            DarkOrange,
+            DarkOrchid,
+            DarkRed,
+            DarkSalmon,
+            DarkSeaGreen,
+            DarkSlateBlue,
+            DarkSlateGray,
+            DarkTurquoise,
+            DarkViolet,
+            DeepPink,
+            DeepSkyBlue,
+            DimGray,
+            DodgerBlue,
+            Firebrick,
+            FloralWhite,
+            ForestGreen,
+            Fuchsia,
+            Gainsboro,
+            GhostWhite,
+            Gold,
+            Goldenrod,
+            Gray,
+            Green,
+            GreenYellow,
+            Honeydew,
+            HotPink,
+            IndianRed,
+            Indigo,
+            Ivory,
+            Khaki,
+            Lavender,
+            LavenderBlush,
+            LawnGreen,
+            LemonChiffon,
+            LightBlue,
+            LightCoral,
+            LightCyan,
+            LightGoldenrodYellow,
+            LightGray,
+            LightGreen,
+            LightPink,
+            LightSalmon,
+            LightSeaGreen,
+            LightSkyBlue,
+            LightSlateGray,
+            LightSteelBlue,
+            LightYellow,
+            Lime,
+            LimeGreen,
+            Linen,
+            Magenta,
+            Maroon,
+            MediumAquamarine,
+            MediumBlue,
+            MediumOrchid,
+            MediumPurple,
+            MediumSeaGreen,
+            MediumSlateBlue,
+            MediumSpringGreen,
+            MediumTurquoise,
+            MediumVioletRed,
+            MidnightBlue,
+            MintCream,
+            MistyRose,
+            Moccasin,
+            NavajoWhite,
+            Navy,
+            OldLace,
+            Olive,
+            OliveDrab,
+            Orange,
+            OrangeRed,
+            Orchid,
+            PaleGoldenrod,
+            PaleGreen,
+            PaleTurquoise,
+            PaleVioletRed,
+            PapayaWhip,
+            PeachPuff,
+            Peru,
+            Pink,
+            Plum,
+            PowderBlue,
+            Purple,
+            RebeccaPurple,
+            Red,
+            RosyBrown,
+            RoyalBlue,
+            SaddleBrown,
+            Salmon,
+            SandyBrown,
+            SeaGreen,
+            SeaShell,
+            Sienna,
+            Silver,
+            SkyBlue,
+            SlateBlue,
+            SlateGray,
+            Snow,
+            SpringGreen,
+            SteelBlue,
+            Tan,
+            Teal,
+            Thistle,
+            Tomato,
+            Transparent,
+            Turquoise,
+            Violet,
+            Wheat,
+            White,
+            WhiteSmoke,
+            Yellow,
+            YellowGreen
+        };
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.WernerPalette.cs b/src/ImageSharp/Color/Color.WernerPalette.cs
new file mode 100644
index 0000000000..45823479e1
--- /dev/null
+++ b/src/ImageSharp/Color/Color.WernerPalette.cs
@@ -0,0 +1,132 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+
+namespace SixLabors.ImageSharp
+{
+    public partial struct Color
+    {
+        private static readonly Lazy<Color[]> WernerPaletteLazy = new Lazy<Color[]>(CreateWernerPalette, true);
+
+        /// <summary>
+        /// Gets a collection of colors as defined in the original second edition of Werner’s Nomenclature of Colours 1821.
+        /// The hex codes were collected and defined by Nicholas Rougeux <see href="https://www.c82.net/werner"/>.
+        /// </summary>
+        public static ReadOnlySpan<Color> WernerPalette => WernerPaletteLazy.Value;
+
+        private static Color[] CreateWernerPalette() => new[]
+        {
+            FromHex("#f1e9cd"),
+            FromHex("#f2e7cf"),
+            FromHex("#ece6d0"),
+            FromHex("#f2eacc"),
+            FromHex("#f3e9ca"),
+            FromHex("#f2ebcd"),
+            FromHex("#e6e1c9"),
+            FromHex("#e2ddc6"),
+            FromHex("#cbc8b7"),
+            FromHex("#bfbbb0"),
+            FromHex("#bebeb3"),
+            FromHex("#b7b5ac"),
+            FromHex("#bab191"),
+            FromHex("#9c9d9a"),
+            FromHex("#8a8d84"),
+            FromHex("#5b5c61"),
+            FromHex("#555152"),
+            FromHex("#413f44"),
+            FromHex("#454445"),
+            FromHex("#423937"),
+            FromHex("#433635"),
+            FromHex("#252024"),
+            FromHex("#241f20"),
+            FromHex("#281f3f"),
+            FromHex("#1c1949"),
+            FromHex("#4f638d"),
+            FromHex("#383867"),
+            FromHex("#5c6b8f"),
+            FromHex("#657abb"),
+            FromHex("#6f88af"),
+            FromHex("#7994b5"),
+            FromHex("#6fb5a8"),
+            FromHex("#719ba2"),
+            FromHex("#8aa1a6"),
+            FromHex("#d0d5d3"),
+            FromHex("#8590ae"),
+            FromHex("#3a2f52"),
+            FromHex("#39334a"),
+            FromHex("#6c6d94"),
+            FromHex("#584c77"),
+            FromHex("#533552"),
+            FromHex("#463759"),
+            FromHex("#bfbac0"),
+            FromHex("#77747f"),
+            FromHex("#4a475c"),
+            FromHex("#b8bfaf"),
+            FromHex("#b2b599"),
+            FromHex("#979c84"),
+            FromHex("#5d6161"),
+            FromHex("#61ac86"),
+            FromHex("#a4b6a7"),
+            FromHex("#adba98"),
+            FromHex("#93b778"),
+            FromHex("#7d8c55"),
+            FromHex("#33431e"),
+            FromHex("#7c8635"),
+            FromHex("#8e9849"),
+            FromHex("#c2c190"),
+            FromHex("#67765b"),
+            FromHex("#ab924b"),
+            FromHex("#c8c76f"),
+            FromHex("#ccc050"),
+            FromHex("#ebdd99"),
+            FromHex("#ab9649"),
+            FromHex("#dbc364"),
+            FromHex("#e6d058"),
+            FromHex("#ead665"),
+            FromHex("#d09b2c"),
+            FromHex("#a36629"),
+            FromHex("#a77d35"),
+            FromHex("#f0d696"),
+            FromHex("#d7c485"),
+            FromHex("#f1d28c"),
+            FromHex("#efcc83"),
+            FromHex("#f3daa7"),
+            FromHex("#dfa837"),
+            FromHex("#ebbc71"),
+            FromHex("#d17c3f"),
+            FromHex("#92462f"),
+            FromHex("#be7249"),
+            FromHex("#bb603c"),
+            FromHex("#c76b4a"),
+            FromHex("#a75536"),
+            FromHex("#b63e36"),
+            FromHex("#b5493a"),
+            FromHex("#cd6d57"),
+            FromHex("#711518"),
+            FromHex("#e9c49d"),
+            FromHex("#eedac3"),
+            FromHex("#eecfbf"),
+            FromHex("#ce536b"),
+            FromHex("#b74a70"),
+            FromHex("#b7757c"),
+            FromHex("#612741"),
+            FromHex("#7a4848"),
+            FromHex("#3f3033"),
+            FromHex("#8d746f"),
+            FromHex("#4d3635"),
+            FromHex("#6e3b31"),
+            FromHex("#864735"),
+            FromHex("#553d3a"),
+            FromHex("#613936"),
+            FromHex("#7a4b3a"),
+            FromHex("#946943"),
+            FromHex("#c39e6d"),
+            FromHex("#513e32"),
+            FromHex("#8b7859"),
+            FromHex("#9b856b"),
+            FromHex("#766051"),
+            FromHex("#453b32")
+        };
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
new file mode 100644
index 0000000000..3e20cafbd3
--- /dev/null
+++ b/src/ImageSharp/Color/Color.cs
@@ -0,0 +1,185 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers.Binary;
+using System.Globalization;
+using System.Numerics;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    public readonly partial struct Color : IEquatable<Color>
+    {
+        private readonly Rgba64 data;
+
+        public Color(Rgba64 pixel)
+        {
+            this.data = pixel;
+        }
+
+        public Color(Rgba32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Argb32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Bgra32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Rgb24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Bgr24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        public Color(Vector4 vector)
+        {
+            this.data = new Rgba64(vector);
+        }
+
+        public static implicit operator Color(Rgba64 source) => new Color(source);
+
+        public static implicit operator Color(Rgba32 source) => new Color(source);
+
+        public static implicit operator Color(Bgra32 source) => new Color(source);
+
+        public static implicit operator Color(Argb32 source) => new Color(source);
+
+        public static implicit operator Color(Rgb24 source) => new Color(source);
+
+        public static implicit operator Color(Bgr24 source) => new Color(source);
+
+        public static implicit operator Rgba64(Color color) => color.data;
+
+        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
+
+        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
+
+        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
+
+        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
+
+        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
+
+        public static bool operator ==(Color left, Color right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Color left, Color right)
+        {
+            return !left.Equals(right);
+        }
+
+        public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
+
+        /// <summary>
+        /// Creates a new <see cref="Color"/> instance from the string representing a color in hexadecimal form.
+        /// </summary>
+        /// <param name="hex">
+        /// The hexadecimal representation of the combined color components arranged
+        /// in rgb, rgba, rrggbb, or rrggbbaa format to match web syntax.
+        /// </param>
+        /// <returns>Returns a <see cref="Color"/> that represents the color defined by the provided RGBA hex string.</returns>
+        public static Color FromHex(string hex)
+        {
+            Guard.NotNullOrWhiteSpace(hex, nameof(hex));
+
+            hex = ToRgbaHex(hex);
+
+            if (hex is null || !uint.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out uint packedValue))
+            {
+                throw new ArgumentException("Hexadecimal string is not in the correct format.", nameof(hex));
+            }
+
+            var rgba = new Rgba32(BinaryPrimitives.ReverseEndianness(packedValue));
+            return new Color(rgba);
+        }
+
+        /// <summary>
+        /// Gets the hexadecimal representation of the color instance in rrggbbaa form.
+        /// </summary>
+        /// <returns>A hexadecimal string representation of the value.</returns>
+        public string ToHex() => this.data.ToRgba32().ToHex();
+
+        /// <inheritdoc />
+        public override string ToString() => this.ToHex();
+
+        /// <summary>
+        /// Converts the specified hex value to an rrggbbaa hex value.
+        /// </summary>
+        /// <param name="hex">The hex value to convert.</param>
+        /// <returns>
+        /// A rrggbbaa hex value.
+        /// </returns>
+        private static string ToRgbaHex(string hex)
+        {
+            if (hex[0] == '#')
+            {
+                hex = hex.Substring(1);
+            }
+
+            if (hex.Length == 8)
+            {
+                return hex;
+            }
+
+            if (hex.Length == 6)
+            {
+                return hex + "FF";
+            }
+
+            if (hex.Length < 3 || hex.Length > 4)
+            {
+                return null;
+            }
+
+            char r = hex[0];
+            char g = hex[1];
+            char b = hex[2];
+            char a = hex.Length == 3 ? 'F' : hex[3];
+
+            return new string(new[] { r, r, g, g, b, b, a, a });
+        }
+
+        public TPixel ToPixel<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel pixel = default;
+            pixel.FromRgba64(this.data);
+            return pixel;
+        }
+
+        public bool Equals(Color other)
+        {
+            return this.data.PackedValue == other.data.PackedValue;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj))
+            {
+                return false;
+            }
+            return obj is Color other && this.Equals(other);
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            return this.data.PackedValue.GetHashCode();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/ImageSharp.csproj.DotSettings b/src/ImageSharp/ImageSharp.csproj.DotSettings
index e446893e94..e43e92ddce 100644
--- a/src/ImageSharp/ImageSharp.csproj.DotSettings
+++ b/src/ImageSharp/ImageSharp.csproj.DotSettings
@@ -1,4 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=color/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=common/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=common_005Cexceptions/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cgenerated/@EntryIndexedValue">True</s:Boolean>
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.CastFrom.cs b/tests/ImageSharp.Tests/Color/ColorTests.CastFrom.cs
new file mode 100644
index 0000000000..22c6d55ad8
--- /dev/null
+++ b/tests/ImageSharp.Tests/Color/ColorTests.CastFrom.cs
@@ -0,0 +1,93 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ColorTests
+    {
+        public class CastFrom
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgba64 data = color.ToPixel<Rgba64>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgba32 data = color.ToPixel<Rgba32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Argb32 data = color.ToPixel<Argb32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Bgra32 data = color.ToPixel<Bgra32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Rgb24 data = color.ToPixel<Rgb24>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = source;
+
+                // Assert:
+                Bgr24 data = color.ToPixel<Bgr24>();
+                Assert.Equal(source, data);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.CastTo.cs b/tests/ImageSharp.Tests/Color/ColorTests.CastTo.cs
new file mode 100644
index 0000000000..d44472b28a
--- /dev/null
+++ b/tests/ImageSharp.Tests/Color/ColorTests.CastTo.cs
@@ -0,0 +1,93 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ColorTests
+    {
+        public class CastTo
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba64 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Argb32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgra32 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgb24 data = color;
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgr24 data = color;
+                Assert.Equal(source, data);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.ConstructFrom.cs b/tests/ImageSharp.Tests/Color/ColorTests.ConstructFrom.cs
new file mode 100644
index 0000000000..9d21cd80c5
--- /dev/null
+++ b/tests/ImageSharp.Tests/Color/ColorTests.ConstructFrom.cs
@@ -0,0 +1,93 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ColorTests
+    {
+        public class ConstructFrom
+        {
+            [Fact]
+            public void Rgba64()
+            {
+                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba64 data = color.ToPixel<Rgba64>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgba32()
+            {
+                Rgba32 source = new Rgba32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgba32 data = color.ToPixel<Rgba32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Argb32()
+            {
+                Argb32 source = new Argb32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Argb32 data = color.ToPixel<Argb32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgra32()
+            {
+                Bgra32 source = new Bgra32(1, 22, 33, 231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgra32 data = color.ToPixel<Bgra32>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Rgb24()
+            {
+                Rgb24 source = new Rgb24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Rgb24 data = color.ToPixel<Rgb24>();
+                Assert.Equal(source, data);
+            }
+            
+            [Fact]
+            public void Bgr24()
+            {
+                Bgr24 source = new Bgr24(1, 22,  231);
+                
+                // Act:
+                Color color = new Color(source);
+
+                // Assert:
+                Bgr24 data = color.ToPixel<Bgr24>();
+                Assert.Equal(source, data);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.cs b/tests/ImageSharp.Tests/Color/ColorTests.cs
new file mode 100644
index 0000000000..729ef94e3c
--- /dev/null
+++ b/tests/ImageSharp.Tests/Color/ColorTests.cs
@@ -0,0 +1,97 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Linq;
+using System.Reflection;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ColorTests
+    {
+        [Fact]
+        public void Equality_WhenTrue()
+        {
+            Color c1 = new Rgba64(100, 2000, 3000, 40000);
+            Color c2 = new Rgba64(100, 2000, 3000, 40000);
+           
+            Assert.True(c1.Equals(c2));
+            Assert.True(c1 == c2);
+            Assert.False(c1 != c2);
+            Assert.True(c1.GetHashCode() == c2.GetHashCode());
+        }
+        
+        [Fact]
+        public void Equality_WhenFalse()
+        {
+            Color c1 = new Rgba64(100, 2000, 3000, 40000);
+            Color c2 = new Rgba64(101, 2000, 3000, 40000);
+            Color c3 = new Rgba64(100, 2000, 3000, 40001);
+            
+            Assert.False(c1.Equals(c2));
+            Assert.False(c2.Equals(c3));
+            Assert.False(c3.Equals(c1));
+            
+            Assert.False(c1 == c2);
+            Assert.True(c1 != c2);
+        }
+        
+        [Fact]
+        public void ToHex()
+        {
+            string expected = "ABCD1234";
+            Color color = Color.FromHex(expected);
+            string actual = color.ToHex();
+            
+            Assert.Equal(expected, actual);
+        }
+
+        [Fact]
+        public void WebSafePalette_IsCorrect()
+        {
+            Rgba32[] actualPalette = Color.WebSafePalette.ToArray().Select(c => (Rgba32)c).ToArray();
+            Assert.Equal(ReferencePalette.WebSafeColors, actualPalette);
+        }
+
+        [Fact]
+        public void WernerPalette_IsCorrect()
+        {
+            Rgba32[] actualPalette = Color.WernerPalette.ToArray().Select(c => (Rgba32)c).ToArray();
+            Assert.Equal(ReferencePalette.WernerColors, actualPalette);
+        }
+        
+        public class FromHex
+        {
+            [Fact]
+            public void ShortHex()
+            {
+                Assert.Equal(new Rgb24(255, 255, 255), (Rgb24) Color.FromHex("#fff"));
+                Assert.Equal(new Rgb24(255, 255, 255), (Rgb24) Color.FromHex("fff"));
+                Assert.Equal(new Rgba32(0, 0, 0, 255), (Rgba32) Color.FromHex("000f"));
+            }
+
+            [Fact]
+            public void LeadingPoundIsOptional()
+            {
+                Assert.Equal(new Rgb24(0, 128, 128), (Rgb24) Color.FromHex("#008080"));
+                Assert.Equal(new Rgb24(0, 128, 128), (Rgb24) Color.FromHex("008080"));
+            }
+
+            [Fact]
+            public void ThrowsOnEmpty()
+            {
+                Assert.Throws<ArgumentException>(() => Color.FromHex(""));
+            }
+
+            [Fact]
+            public void ThrowsOnNull()
+            {
+                Assert.Throws<ArgumentNullException>(() => Color.FromHex(null));
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Color/ReferencePalette.cs b/tests/ImageSharp.Tests/Color/ReferencePalette.cs
new file mode 100644
index 0000000000..3c6e382c58
--- /dev/null
+++ b/tests/ImageSharp.Tests/Color/ReferencePalette.cs
@@ -0,0 +1,277 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    internal static class ReferencePalette
+    {
+        /// <summary>
+        /// Gets a collection of named, web safe, colors as defined in the CSS Color Module Level 4.
+        /// </summary>
+        public static readonly Rgba32[] WebSafeColors =
+        {
+            Rgba32.AliceBlue,
+            Rgba32.AntiqueWhite,
+            Rgba32.Aqua,
+            Rgba32.Aquamarine,
+            Rgba32.Azure,
+            Rgba32.Beige,
+            Rgba32.Bisque,
+            Rgba32.Black,
+            Rgba32.BlanchedAlmond,
+            Rgba32.Blue,
+            Rgba32.BlueViolet,
+            Rgba32.Brown,
+            Rgba32.BurlyWood,
+            Rgba32.CadetBlue,
+            Rgba32.Chartreuse,
+            Rgba32.Chocolate,
+            Rgba32.Coral,
+            Rgba32.CornflowerBlue,
+            Rgba32.Cornsilk,
+            Rgba32.Crimson,
+            Rgba32.Cyan,
+            Rgba32.DarkBlue,
+            Rgba32.DarkCyan,
+            Rgba32.DarkGoldenrod,
+            Rgba32.DarkGray,
+            Rgba32.DarkGreen,
+            Rgba32.DarkKhaki,
+            Rgba32.DarkMagenta,
+            Rgba32.DarkOliveGreen,
+            Rgba32.DarkOrange,
+            Rgba32.DarkOrchid,
+            Rgba32.DarkRed,
+            Rgba32.DarkSalmon,
+            Rgba32.DarkSeaGreen,
+            Rgba32.DarkSlateBlue,
+            Rgba32.DarkSlateGray,
+            Rgba32.DarkTurquoise,
+            Rgba32.DarkViolet,
+            Rgba32.DeepPink,
+            Rgba32.DeepSkyBlue,
+            Rgba32.DimGray,
+            Rgba32.DodgerBlue,
+            Rgba32.Firebrick,
+            Rgba32.FloralWhite,
+            Rgba32.ForestGreen,
+            Rgba32.Fuchsia,
+            Rgba32.Gainsboro,
+            Rgba32.GhostWhite,
+            Rgba32.Gold,
+            Rgba32.Goldenrod,
+            Rgba32.Gray,
+            Rgba32.Green,
+            Rgba32.GreenYellow,
+            Rgba32.Honeydew,
+            Rgba32.HotPink,
+            Rgba32.IndianRed,
+            Rgba32.Indigo,
+            Rgba32.Ivory,
+            Rgba32.Khaki,
+            Rgba32.Lavender,
+            Rgba32.LavenderBlush,
+            Rgba32.LawnGreen,
+            Rgba32.LemonChiffon,
+            Rgba32.LightBlue,
+            Rgba32.LightCoral,
+            Rgba32.LightCyan,
+            Rgba32.LightGoldenrodYellow,
+            Rgba32.LightGray,
+            Rgba32.LightGreen,
+            Rgba32.LightPink,
+            Rgba32.LightSalmon,
+            Rgba32.LightSeaGreen,
+            Rgba32.LightSkyBlue,
+            Rgba32.LightSlateGray,
+            Rgba32.LightSteelBlue,
+            Rgba32.LightYellow,
+            Rgba32.Lime,
+            Rgba32.LimeGreen,
+            Rgba32.Linen,
+            Rgba32.Magenta,
+            Rgba32.Maroon,
+            Rgba32.MediumAquamarine,
+            Rgba32.MediumBlue,
+            Rgba32.MediumOrchid,
+            Rgba32.MediumPurple,
+            Rgba32.MediumSeaGreen,
+            Rgba32.MediumSlateBlue,
+            Rgba32.MediumSpringGreen,
+            Rgba32.MediumTurquoise,
+            Rgba32.MediumVioletRed,
+            Rgba32.MidnightBlue,
+            Rgba32.MintCream,
+            Rgba32.MistyRose,
+            Rgba32.Moccasin,
+            Rgba32.NavajoWhite,
+            Rgba32.Navy,
+            Rgba32.OldLace,
+            Rgba32.Olive,
+            Rgba32.OliveDrab,
+            Rgba32.Orange,
+            Rgba32.OrangeRed,
+            Rgba32.Orchid,
+            Rgba32.PaleGoldenrod,
+            Rgba32.PaleGreen,
+            Rgba32.PaleTurquoise,
+            Rgba32.PaleVioletRed,
+            Rgba32.PapayaWhip,
+            Rgba32.PeachPuff,
+            Rgba32.Peru,
+            Rgba32.Pink,
+            Rgba32.Plum,
+            Rgba32.PowderBlue,
+            Rgba32.Purple,
+            Rgba32.RebeccaPurple,
+            Rgba32.Red,
+            Rgba32.RosyBrown,
+            Rgba32.RoyalBlue,
+            Rgba32.SaddleBrown,
+            Rgba32.Salmon,
+            Rgba32.SandyBrown,
+            Rgba32.SeaGreen,
+            Rgba32.SeaShell,
+            Rgba32.Sienna,
+            Rgba32.Silver,
+            Rgba32.SkyBlue,
+            Rgba32.SlateBlue,
+            Rgba32.SlateGray,
+            Rgba32.Snow,
+            Rgba32.SpringGreen,
+            Rgba32.SteelBlue,
+            Rgba32.Tan,
+            Rgba32.Teal,
+            Rgba32.Thistle,
+            Rgba32.Tomato,
+            Rgba32.Transparent,
+            Rgba32.Turquoise,
+            Rgba32.Violet,
+            Rgba32.Wheat,
+            Rgba32.White,
+            Rgba32.WhiteSmoke,
+            Rgba32.Yellow,
+            Rgba32.YellowGreen
+        };
+
+        /// <summary>
+        /// Gets a collection of colors as defined in the original second edition of Werner’s Nomenclature of Colours 1821.
+        /// The hex codes were collected and defined by Nicholas Rougeux <see href="https://www.c82.net/werner"/>
+        /// </summary>
+        public static readonly Rgba32[] WernerColors =
+        {
+            Rgba32.FromHex("#f1e9cd"),
+            Rgba32.FromHex("#f2e7cf"),
+            Rgba32.FromHex("#ece6d0"),
+            Rgba32.FromHex("#f2eacc"),
+            Rgba32.FromHex("#f3e9ca"),
+            Rgba32.FromHex("#f2ebcd"),
+            Rgba32.FromHex("#e6e1c9"),
+            Rgba32.FromHex("#e2ddc6"),
+            Rgba32.FromHex("#cbc8b7"),
+            Rgba32.FromHex("#bfbbb0"),
+            Rgba32.FromHex("#bebeb3"),
+            Rgba32.FromHex("#b7b5ac"),
+            Rgba32.FromHex("#bab191"),
+            Rgba32.FromHex("#9c9d9a"),
+            Rgba32.FromHex("#8a8d84"),
+            Rgba32.FromHex("#5b5c61"),
+            Rgba32.FromHex("#555152"),
+            Rgba32.FromHex("#413f44"),
+            Rgba32.FromHex("#454445"),
+            Rgba32.FromHex("#423937"),
+            Rgba32.FromHex("#433635"),
+            Rgba32.FromHex("#252024"),
+            Rgba32.FromHex("#241f20"),
+            Rgba32.FromHex("#281f3f"),
+            Rgba32.FromHex("#1c1949"),
+            Rgba32.FromHex("#4f638d"),
+            Rgba32.FromHex("#383867"),
+            Rgba32.FromHex("#5c6b8f"),
+            Rgba32.FromHex("#657abb"),
+            Rgba32.FromHex("#6f88af"),
+            Rgba32.FromHex("#7994b5"),
+            Rgba32.FromHex("#6fb5a8"),
+            Rgba32.FromHex("#719ba2"),
+            Rgba32.FromHex("#8aa1a6"),
+            Rgba32.FromHex("#d0d5d3"),
+            Rgba32.FromHex("#8590ae"),
+            Rgba32.FromHex("#3a2f52"),
+            Rgba32.FromHex("#39334a"),
+            Rgba32.FromHex("#6c6d94"),
+            Rgba32.FromHex("#584c77"),
+            Rgba32.FromHex("#533552"),
+            Rgba32.FromHex("#463759"),
+            Rgba32.FromHex("#bfbac0"),
+            Rgba32.FromHex("#77747f"),
+            Rgba32.FromHex("#4a475c"),
+            Rgba32.FromHex("#b8bfaf"),
+            Rgba32.FromHex("#b2b599"),
+            Rgba32.FromHex("#979c84"),
+            Rgba32.FromHex("#5d6161"),
+            Rgba32.FromHex("#61ac86"),
+            Rgba32.FromHex("#a4b6a7"),
+            Rgba32.FromHex("#adba98"),
+            Rgba32.FromHex("#93b778"),
+            Rgba32.FromHex("#7d8c55"),
+            Rgba32.FromHex("#33431e"),
+            Rgba32.FromHex("#7c8635"),
+            Rgba32.FromHex("#8e9849"),
+            Rgba32.FromHex("#c2c190"),
+            Rgba32.FromHex("#67765b"),
+            Rgba32.FromHex("#ab924b"),
+            Rgba32.FromHex("#c8c76f"),
+            Rgba32.FromHex("#ccc050"),
+            Rgba32.FromHex("#ebdd99"),
+            Rgba32.FromHex("#ab9649"),
+            Rgba32.FromHex("#dbc364"),
+            Rgba32.FromHex("#e6d058"),
+            Rgba32.FromHex("#ead665"),
+            Rgba32.FromHex("#d09b2c"),
+            Rgba32.FromHex("#a36629"),
+            Rgba32.FromHex("#a77d35"),
+            Rgba32.FromHex("#f0d696"),
+            Rgba32.FromHex("#d7c485"),
+            Rgba32.FromHex("#f1d28c"),
+            Rgba32.FromHex("#efcc83"),
+            Rgba32.FromHex("#f3daa7"),
+            Rgba32.FromHex("#dfa837"),
+            Rgba32.FromHex("#ebbc71"),
+            Rgba32.FromHex("#d17c3f"),
+            Rgba32.FromHex("#92462f"),
+            Rgba32.FromHex("#be7249"),
+            Rgba32.FromHex("#bb603c"),
+            Rgba32.FromHex("#c76b4a"),
+            Rgba32.FromHex("#a75536"),
+            Rgba32.FromHex("#b63e36"),
+            Rgba32.FromHex("#b5493a"),
+            Rgba32.FromHex("#cd6d57"),
+            Rgba32.FromHex("#711518"),
+            Rgba32.FromHex("#e9c49d"),
+            Rgba32.FromHex("#eedac3"),
+            Rgba32.FromHex("#eecfbf"),
+            Rgba32.FromHex("#ce536b"),
+            Rgba32.FromHex("#b74a70"),
+            Rgba32.FromHex("#b7757c"),
+            Rgba32.FromHex("#612741"),
+            Rgba32.FromHex("#7a4848"),
+            Rgba32.FromHex("#3f3033"),
+            Rgba32.FromHex("#8d746f"),
+            Rgba32.FromHex("#4d3635"),
+            Rgba32.FromHex("#6e3b31"),
+            Rgba32.FromHex("#864735"),
+            Rgba32.FromHex("#553d3a"),
+            Rgba32.FromHex("#613936"),
+            Rgba32.FromHex("#7a4b3a"),
+            Rgba32.FromHex("#946943"),
+            Rgba32.FromHex("#c39e6d"),
+            Rgba32.FromHex("#513e32"),
+            Rgba32.FromHex("#8b7859"),
+            Rgba32.FromHex("#9b856b"),
+            Rgba32.FromHex("#766051"),
+            Rgba32.FromHex("#453b32")
+        };
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/ColorTests.cs b/tests/ImageSharp.Tests/ColorTests.cs
deleted file mode 100644
index a1eaf9fae3..0000000000
--- a/tests/ImageSharp.Tests/ColorTests.cs
+++ /dev/null
@@ -1,255 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    public class ColorTests
-    {
-        public class ConstructFrom
-        {
-            [Fact]
-            public void Rgba64()
-            {
-                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgba64 data = color.ToPixel<Rgba64>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgba32()
-            {
-                Rgba32 source = new Rgba32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgba32 data = color.ToPixel<Rgba32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Argb32()
-            {
-                Argb32 source = new Argb32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Argb32 data = color.ToPixel<Argb32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgra32()
-            {
-                Bgra32 source = new Bgra32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Bgra32 data = color.ToPixel<Bgra32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgb24()
-            {
-                Rgb24 source = new Rgb24(1, 22,  231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgb24 data = color.ToPixel<Rgb24>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgr24()
-            {
-                Bgr24 source = new Bgr24(1, 22,  231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Bgr24 data = color.ToPixel<Bgr24>();
-                Assert.Equal(source, data);
-            }
-        }
-        
-        public class Cast
-        {
-            [Fact]
-            public void Rgba64()
-            {
-                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Rgba64 data = color.ToPixel<Rgba64>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgba32()
-            {
-                Rgba32 source = new Rgba32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Rgba32 data = color.ToPixel<Rgba32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Argb32()
-            {
-                Argb32 source = new Argb32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Argb32 data = color.ToPixel<Argb32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgra32()
-            {
-                Bgra32 source = new Bgra32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Bgra32 data = color.ToPixel<Bgra32>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgb24()
-            {
-                Rgb24 source = new Rgb24(1, 22,  231);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Rgb24 data = color.ToPixel<Rgb24>();
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgr24()
-            {
-                Bgr24 source = new Bgr24(1, 22,  231);
-                
-                // Act:
-                Color color = source;
-
-                // Assert:
-                Bgr24 data = color.ToPixel<Bgr24>();
-                Assert.Equal(source, data);
-            }
-        }
-        
-        public class CastTo
-        {
-            [Fact]
-            public void Rgba64()
-            {
-                Rgba64 source = new Rgba64(100, 2222, 3333, 4444);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgba64 data = color;
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgba32()
-            {
-                Rgba32 source = new Rgba32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgba32 data = color;
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Argb32()
-            {
-                Argb32 source = new Argb32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Argb32 data = color;
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgra32()
-            {
-                Bgra32 source = new Bgra32(1, 22, 33, 231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Bgra32 data = color;
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Rgb24()
-            {
-                Rgb24 source = new Rgb24(1, 22,  231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Rgb24 data = color;
-                Assert.Equal(source, data);
-            }
-            
-            [Fact]
-            public void Bgr24()
-            {
-                Bgr24 source = new Bgr24(1, 22,  231);
-                
-                // Act:
-                Color color = new Color(source);
-
-                // Assert:
-                Bgr24 data = color;
-                Assert.Equal(source, data);
-            }
-        }
-    }
-}
\ No newline at end of file

From 0426d5ab12f25437c429905a15307484cecf26ae Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Tue, 7 May 2019 00:02:54 +0200
Subject: [PATCH 145/223] refactor dithering and error diffusion to use Color

---
 src/ImageSharp/Color/Color.cs                 | 67 ++++++++-------
 .../Processing/DiffuseExtensions.cs           | 69 ++++++++--------
 src/ImageSharp/Processing/DitherExtensions.cs | 55 ++++++-------
 .../ErrorDiffusionPaletteProcessor.cs         | 77 +++---------------
 .../ErrorDiffusionPaletteProcessor{TPixel}.cs | 81 +++++++++++++++++++
 .../OrderedDitherPaletteProcessor.cs          | 70 +++-------------
 .../OrderedDitherPaletteProcessor{TPixel}.cs  | 79 ++++++++++++++++++
 .../Dithering/PaletteDitherProcessor.cs       | 37 +++++++++
 ...e.cs => PaletteDitherProcessor{TPixel}.cs} | 35 ++++----
 .../Processing/Dithering/DitherTest.cs        | 42 ++++++----
 10 files changed, 370 insertions(+), 242 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
 rename src/ImageSharp/Processing/Processors/Dithering/{PaletteDitherProcessorBase.cs => PaletteDitherProcessor{TPixel}.cs} (77%)

diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index 3e20cafbd3..bc97393cc1 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -5,6 +5,7 @@ using System;
 using System.Buffers.Binary;
 using System.Globalization;
 using System.Numerics;
+using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -117,6 +118,44 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc />
         public override string ToString() => this.ToHex();
 
+        public TPixel ToPixel<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel pixel = default;
+            pixel.FromRgba64(this.data);
+            return pixel;
+        }
+
+        public bool Equals(Color other)
+        {
+            return this.data.PackedValue == other.data.PackedValue;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj))
+            {
+                return false;
+            }
+            return obj is Color other && this.Equals(other);
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            return this.data.PackedValue.GetHashCode();
+        }
+
+        internal static void ToPixel<TPixel>(
+            Configuration configuration,
+            ReadOnlySpan<Color> source,
+            Span<TPixel> destination)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            ReadOnlySpan<Rgba64> rgba64Span = MemoryMarshal.Cast<Color, Rgba64>(source);
+            PixelOperations<TPixel>.Instance.FromRgba64(Configuration.Default, rgba64Span, destination);
+        }
+
         /// <summary>
         /// Converts the specified hex value to an rrggbbaa hex value.
         /// </summary>
@@ -153,33 +192,5 @@ namespace SixLabors.ImageSharp
 
             return new string(new[] { r, r, g, g, b, b, a, a });
         }
-
-        public TPixel ToPixel<TPixel>()
-            where TPixel : struct, IPixel<TPixel>
-        {
-            TPixel pixel = default;
-            pixel.FromRgba64(this.data);
-            return pixel;
-        }
-
-        public bool Equals(Color other)
-        {
-            return this.data.PackedValue == other.data.PackedValue;
-        }
-
-        public override bool Equals(object obj)
-        {
-            if (ReferenceEquals(null, obj))
-            {
-                return false;
-            }
-            return obj is Color other && this.Equals(other);
-        }
-
-        /// <inheritdoc />
-        public override int GetHashCode()
-        {
-            return this.data.PackedValue.GetHashCode();
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/DiffuseExtensions.cs b/src/ImageSharp/Processing/DiffuseExtensions.cs
index 4668363e9a..cd714c3da3 100644
--- a/src/ImageSharp/Processing/DiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/DiffuseExtensions.cs
@@ -1,14 +1,15 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
+using System;
+
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Dithering
 {
     /// <summary>
-    /// Defines extension methods to apply diffusion to an <see cref="Image{TPixel}"/>
+    /// Defines extension methods to apply diffusion to an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class DiffuseExtensions
@@ -16,68 +17,68 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Diffuse(source, KnownDiffusers.FloydSteinberg, .5F);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(this IImageProcessingContext source) =>
+            Diffuse(source, KnownDiffusers.FloydSteinberg, .5F);
 
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, float threshold)
-            where TPixel : struct, IPixel<TPixel>
-            => Diffuse(source, KnownDiffusers.FloydSteinberg, threshold);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(this IImageProcessingContext source, float threshold) =>
+            Diffuse(source, KnownDiffusers.FloydSteinberg, threshold);
 
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold) =>
+            source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold));
 
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold), rectangle);
 
         /// <summary>
         /// Dithers the image reducing it to the given palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel[] palette)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold, palette));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            ReadOnlySpan<Color> palette) =>
+            source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold, palette));
 
         /// <summary>
         /// Dithers the image reducing it to the given palette using error diffusion.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
@@ -85,9 +86,13 @@ namespace SixLabors.ImageSharp.Processing.Dithering
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Diffuse<TPixel>(this IImageProcessingContext<TPixel> source, IErrorDiffuser diffuser, float threshold, TPixel[] palette, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new ErrorDiffusionPaletteProcessor<TPixel>(diffuser, threshold, palette), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Diffuse(
+            this IImageProcessingContext source,
+            IErrorDiffuser diffuser,
+            float threshold,
+            ReadOnlySpan<Color> palette,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold, palette), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/DitherExtensions.cs b/src/ImageSharp/Processing/DitherExtensions.cs
index aeb975d1c1..55794aec20 100644
--- a/src/ImageSharp/Processing/DitherExtensions.cs
+++ b/src/ImageSharp/Processing/DitherExtensions.cs
@@ -1,14 +1,15 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
+using System;
+
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines dithering extensions to apply on an <see cref="Image{TPixel}"/>
+    /// Defines dithering extensions to apply on an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class DitherExtensions
@@ -16,63 +17,63 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using Bayer4x4 ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Dither(source, KnownDitherers.BayerDither4x4);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Dither(this IImageProcessingContext source) =>
+            Dither(source, KnownDitherers.BayerDither4x4);
 
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Dither(this IImageProcessingContext source, IOrderedDither dither) =>
+            source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither));
 
         /// <summary>
         /// Dithers the image reducing it to the given palette using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel[] palette)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither, palette));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Dither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            ReadOnlySpan<Color> palette) =>
+            source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither, palette));
 
         /// <summary>
         /// Dithers the image reducing it to a web-safe palette using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Dither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither), rectangle);
 
         /// <summary>
         /// Dithers the image reducing it to the given palette using ordered dithering.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Dither<TPixel>(this IImageProcessingContext<TPixel> source, IOrderedDither dither, TPixel[] palette, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new OrderedDitherPaletteProcessor<TPixel>(dither, palette), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Dither(
+            this IImageProcessingContext source,
+            IOrderedDither dither,
+            ReadOnlySpan<Color> palette,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither, palette), rectangle);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
index 911d3e8fdc..5436a7733f 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
@@ -2,21 +2,19 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
+
+using SixLabors.ImageSharp.Processing.Processors.Binarization;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Dithering
 {
     /// <summary>
-    /// An <see cref="IImageProcessor{TPixel}"/> that dithers an image using error diffusion.
+    /// Defines a dither operation using error diffusion.
+    /// If no palette is given this will default to the web safe colors defined in the CSS Color Module Level 4.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ErrorDiffusionPaletteProcessor<TPixel> : PaletteDitherProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class ErrorDiffusionPaletteProcessor : PaletteDitherProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser)
@@ -25,22 +23,22 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser, float threshold)
-            : this(diffuser, threshold, NamedColors<TPixel>.WebSafePalette)
+            : this(diffuser, threshold, Color.WebSafePalette)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ErrorDiffusionPaletteProcessor"/> class.
         /// </summary>
         /// <param name="diffuser">The error diffuser</param>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser, float threshold, TPixel[] palette)
+        public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser, float threshold, ReadOnlySpan<Color> palette)
             : base(palette)
         {
             Guard.NotNull(diffuser, nameof(diffuser));
@@ -60,59 +58,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// </summary>
         public float Threshold { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            byte threshold = (byte)MathF.Round(this.Threshold * 255F);
-            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
-
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startY = interest.Y;
-            int endY = interest.Bottom;
-            int startX = interest.X;
-            int endX = interest.Right;
-
-            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
-            TPixel sourcePixel = source[startX, startY];
-            TPixel previousPixel = sourcePixel;
-            PixelPair<TPixel> pair = this.GetClosestPixelPair(ref sourcePixel);
-            Rgba32 rgba = default;
-            sourcePixel.ToRgba32(ref rgba);
-
-            // Convert to grayscale using ITU-R Recommendation BT.709 if required
-            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-            for (int y = startY; y < endY; y++)
-            {
-                Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                for (int x = startX; x < endX; x++)
-                {
-                    sourcePixel = row[x];
-
-                    // Check if this is the same as the last pixel. If so use that value
-                    // rather than calculating it again. This is an inexpensive optimization.
-                    if (!previousPixel.Equals(sourcePixel))
-                    {
-                        pair = this.GetClosestPixelPair(ref sourcePixel);
-
-                        // No error to spread, exact match.
-                        if (sourcePixel.Equals(pair.First))
-                        {
-                            continue;
-                        }
-
-                        sourcePixel.ToRgba32(ref rgba);
-                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-                        // Setup the previous pointer
-                        previousPixel = sourcePixel;
-                    }
-
-                    TPixel transformedPixel = luminance >= threshold ? pair.Second : pair.First;
-                    this.Diffuser.Dither(source, sourcePixel, transformedPixel, x, y, startX, startY, endX, endY);
-                }
-            }
+            return new ErrorDiffusionPaletteProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor{TPixel}.cs
new file mode 100644
index 0000000000..7edf287e85
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor{TPixel}.cs
@@ -0,0 +1,81 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Dithering
+{
+    /// <summary>
+    /// An <see cref="IImageProcessor{TPixel}"/> that dithers an image using error diffusion.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class ErrorDiffusionPaletteProcessor<TPixel> : PaletteDitherProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        public ErrorDiffusionPaletteProcessor(ErrorDiffusionPaletteProcessor definition)
+            : base(definition)
+        {
+        }
+
+        private new ErrorDiffusionPaletteProcessor Definition => (ErrorDiffusionPaletteProcessor)base.Definition;
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            byte threshold = (byte)MathF.Round(this.Definition.Threshold * 255F);
+            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
+
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startY = interest.Y;
+            int endY = interest.Bottom;
+            int startX = interest.X;
+            int endX = interest.Right;
+
+            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
+            TPixel sourcePixel = source[startX, startY];
+            TPixel previousPixel = sourcePixel;
+            PixelPair<TPixel> pair = this.GetClosestPixelPair(ref sourcePixel);
+            Rgba32 rgba = default;
+            sourcePixel.ToRgba32(ref rgba);
+
+            // Convert to grayscale using ITU-R Recommendation BT.709 if required
+            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+            for (int y = startY; y < endY; y++)
+            {
+                Span<TPixel> row = source.GetPixelRowSpan(y);
+
+                for (int x = startX; x < endX; x++)
+                {
+                    sourcePixel = row[x];
+
+                    // Check if this is the same as the last pixel. If so use that value
+                    // rather than calculating it again. This is an inexpensive optimization.
+                    if (!previousPixel.Equals(sourcePixel))
+                    {
+                        pair = this.GetClosestPixelPair(ref sourcePixel);
+
+                        // No error to spread, exact match.
+                        if (sourcePixel.Equals(pair.First))
+                        {
+                            continue;
+                        }
+
+                        sourcePixel.ToRgba32(ref rgba);
+                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+                        // Setup the previous pointer
+                        previousPixel = sourcePixel;
+                    }
+
+                    TPixel transformedPixel = luminance >= threshold ? pair.Second : pair.First;
+                    this.Definition.Diffuser.Dither(source, sourcePixel, transformedPixel, x, y, startX, startY, endX, endY);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
index 1b4910a147..ba7c1e9980 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
@@ -2,35 +2,30 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Dithering
 {
     /// <summary>
-    /// An <see cref="IImageProcessor{TPixel}"/> that dithers an image using error diffusion.
+    /// Defines a dithering operation that dithers an image using error diffusion.
     /// If no palette is given this will default to the web safe colors defined in the CSS Color Module Level 4.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class OrderedDitherPaletteProcessor<TPixel> : PaletteDitherProcessorBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class OrderedDitherPaletteProcessor : PaletteDitherProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="OrderedDitherPaletteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="OrderedDitherPaletteProcessor"/> class.
         /// </summary>
         /// <param name="dither">The ordered ditherer.</param>
         public OrderedDitherPaletteProcessor(IOrderedDither dither)
-            : this(dither, NamedColors<TPixel>.WebSafePalette)
+            : this(dither, Color.WebSafePalette)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="OrderedDitherPaletteProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="OrderedDitherPaletteProcessor"/> class.
         /// </summary>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        public OrderedDitherPaletteProcessor(IOrderedDither dither, TPixel[] palette)
+        public OrderedDitherPaletteProcessor(IOrderedDither dither, ReadOnlySpan<Color> palette)
             : base(palette) => this.Dither = dither ?? throw new ArgumentNullException(nameof(dither));
 
         /// <summary>
@@ -38,57 +33,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// </summary>
         public IOrderedDither Dither { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
-
-            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
-            int startY = interest.Y;
-            int endY = interest.Bottom;
-            int startX = interest.X;
-            int endX = interest.Right;
-
-            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
-            TPixel sourcePixel = source[startX, startY];
-            TPixel previousPixel = sourcePixel;
-            PixelPair<TPixel> pair = this.GetClosestPixelPair(ref sourcePixel);
-            Rgba32 rgba = default;
-            sourcePixel.ToRgba32(ref rgba);
-
-            // Convert to grayscale using ITU-R Recommendation BT.709 if required
-            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-            for (int y = startY; y < endY; y++)
-            {
-                Span<TPixel> row = source.GetPixelRowSpan(y);
-
-                for (int x = startX; x < endX; x++)
-                {
-                    sourcePixel = row[x];
-
-                    // Check if this is the same as the last pixel. If so use that value
-                    // rather than calculating it again. This is an inexpensive optimization.
-                    if (!previousPixel.Equals(sourcePixel))
-                    {
-                        pair = this.GetClosestPixelPair(ref sourcePixel);
-
-                        // No error to spread, exact match.
-                        if (sourcePixel.Equals(pair.First))
-                        {
-                            continue;
-                        }
-
-                        sourcePixel.ToRgba32(ref rgba);
-                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
-
-                        // Setup the previous pointer
-                        previousPixel = sourcePixel;
-                    }
-
-                    this.Dither.Dither(source, sourcePixel, pair.Second, pair.First, luminance, x, y);
-                }
-            }
+            return new OrderedDitherPaletteProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor{TPixel}.cs
new file mode 100644
index 0000000000..eefa6e5229
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor{TPixel}.cs
@@ -0,0 +1,79 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Dithering
+{
+    /// <summary>
+    /// An <see cref="IImageProcessor{TPixel}"/> that dithers an image using error diffusion.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class OrderedDitherPaletteProcessor<TPixel> : PaletteDitherProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        public OrderedDitherPaletteProcessor(OrderedDitherPaletteProcessor definition)
+            : base(definition)
+        {
+        }
+
+        private new OrderedDitherPaletteProcessor Definition => (OrderedDitherPaletteProcessor)base.Definition;
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            bool isAlphaOnly = typeof(TPixel) == typeof(Alpha8);
+
+            var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
+            int startY = interest.Y;
+            int endY = interest.Bottom;
+            int startX = interest.X;
+            int endX = interest.Right;
+
+            // Collect the values before looping so we can reduce our calculation count for identical sibling pixels
+            TPixel sourcePixel = source[startX, startY];
+            TPixel previousPixel = sourcePixel;
+            PixelPair<TPixel> pair = this.GetClosestPixelPair(ref sourcePixel);
+            Rgba32 rgba = default;
+            sourcePixel.ToRgba32(ref rgba);
+
+            // Convert to grayscale using ITU-R Recommendation BT.709 if required
+            byte luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+            for (int y = startY; y < endY; y++)
+            {
+                Span<TPixel> row = source.GetPixelRowSpan(y);
+
+                for (int x = startX; x < endX; x++)
+                {
+                    sourcePixel = row[x];
+
+                    // Check if this is the same as the last pixel. If so use that value
+                    // rather than calculating it again. This is an inexpensive optimization.
+                    if (!previousPixel.Equals(sourcePixel))
+                    {
+                        pair = this.GetClosestPixelPair(ref sourcePixel);
+
+                        // No error to spread, exact match.
+                        if (sourcePixel.Equals(pair.First))
+                        {
+                            continue;
+                        }
+
+                        sourcePixel.ToRgba32(ref rgba);
+                        luminance = isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
+
+                        // Setup the previous pointer
+                        previousPixel = sourcePixel;
+                    }
+
+                    this.Definition.Dither.Dither(source, sourcePixel, pair.Second, pair.First, luminance, x, y);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
new file mode 100644
index 0000000000..904d026345
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
@@ -0,0 +1,37 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Dithering
+{
+    /// <summary>
+    /// The base class for dither and diffusion processors that consume a palette.
+    /// </summary>
+    public abstract class PaletteDitherProcessor : IImageProcessor
+    {
+        private readonly Color[] palette;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PaletteDitherProcessor"/> class.
+        /// </summary>
+        /// <param name="palette">The palette to select substitute colors from.</param>
+        protected PaletteDitherProcessor(ReadOnlySpan<Color> palette)
+        {
+            // This shouldn't be a perf issue:
+            // these arrays are small, and created with low frequency.
+            this.palette = palette.ToArray();
+        }
+
+        /// <summary>
+        /// Gets the palette to select substitute colors from.
+        /// </summary>
+        public ReadOnlySpan<Color> Palette => this.palette;
+
+        /// <inheritdoc />
+        public abstract IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>;
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
similarity index 77%
rename from src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs
rename to src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
index 6313b74c94..334eab833c 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessorBase.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
@@ -1,10 +1,11 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Collections.Generic;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
@@ -14,7 +15,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// The base class for dither and diffusion processors that consume a palette.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class PaletteDitherProcessorBase<TPixel> : ImageProcessor<TPixel>
+    internal abstract class PaletteDitherProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly Dictionary<TPixel, PixelPair<TPixel>> cache = new Dictionary<TPixel, PixelPair<TPixel>>();
@@ -24,19 +25,17 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// </summary>
         private Vector4[] paletteVector;
 
+        private TPixel[] palette;
+
         /// <summary>
-        /// Initializes a new instance of the <see cref="PaletteDitherProcessorBase{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PaletteDitherProcessor{TPixel}"/> class.
         /// </summary>
-        /// <param name="palette">The palette to select substitute colors from.</param>
-        protected PaletteDitherProcessorBase(TPixel[] palette)
+        protected PaletteDitherProcessor(PaletteDitherProcessor definition)
         {
-            this.Palette = palette ?? throw new ArgumentNullException(nameof(palette));
+            this.Definition = definition;
         }
 
-        /// <summary>
-        /// Gets the palette to select substitute colors from.
-        /// </summary>
-        public TPixel[] Palette { get; }
+        protected PaletteDitherProcessor Definition { get; }
 
         /// <summary>
         /// Returns the two closest colors from the palette calculated via Euclidean distance in the Rgba space.
@@ -74,12 +73,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
                 {
                     leastDistance = distance;
                     secondClosest = closest;
-                    closest = this.Palette[index];
+                    closest = this.palette[index];
                 }
                 else if (distance < secondLeastDistance)
                 {
                     secondLeastDistance = distance;
-                    secondClosest = this.Palette[index];
+                    secondClosest = this.palette[index];
                 }
             }
 
@@ -94,11 +93,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         {
             base.BeforeFrameApply(source, sourceRectangle, configuration);
 
+            // Lazy init palette:
+            if (this.palette is null)
+            {
+                ReadOnlySpan<Color> sourcePalette = this.Definition.Palette;
+                this.palette = new TPixel[sourcePalette.Length];
+                Color.ToPixel<TPixel>(configuration, sourcePalette, this.palette);
+            }
+
             // Lazy init paletteVector:
             if (this.paletteVector is null)
             {
-                this.paletteVector = new Vector4[this.Palette.Length];
-                PixelOperations<TPixel>.Instance.ToVector4(configuration, (ReadOnlySpan<TPixel>)this.Palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
+                this.paletteVector = new Vector4[this.palette.Length];
+                PixelOperations<TPixel>.Instance.ToVector4(configuration, (ReadOnlySpan<TPixel>)this.palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
             }
         }
     }
diff --git a/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs b/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
index f393d5923d..59dcde2a63 100644
--- a/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Processing.Dithering;
@@ -12,13 +14,21 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
 {
     public class DitherTest : BaseImageOperationsExtensionTest
     {
+        private class Assert : Xunit.Assert
+        {
+            public static void Equal(ReadOnlySpan<Color> a, ReadOnlySpan<Color> b)
+            {
+                Xunit.Assert.True(a.SequenceEqual(b));
+            }
+        }
+        
         private readonly IOrderedDither orderedDither;
         private readonly IErrorDiffuser errorDiffuser;
-        private readonly Rgba32[] TestPalette =
+        private readonly Color[] TestPalette =
         {
-            Rgba32.Red,
-            Rgba32.Green,
-            Rgba32.Blue
+            Color.Red,
+            Color.Green,
+            Color.Blue
         };
 
         public DitherTest()
@@ -31,24 +41,24 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void Dither_CorrectProcessor()
         {
             this.operations.Dither(this.orderedDither);
-            OrderedDitherPaletteProcessor<Rgba32> p = this.Verify<OrderedDitherPaletteProcessor<Rgba32>>();
+            OrderedDitherPaletteProcessor p = this.Verify<OrderedDitherPaletteProcessor>();
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.WebSafePalette, p.Palette);
+            Assert.Equal(Color.WebSafePalette.ToArray(), p.Palette);
         }
 
         [Fact]
         public void Dither_rect_CorrectProcessor()
         {
             this.operations.Dither(this.orderedDither, this.rect);
-            OrderedDitherPaletteProcessor<Rgba32> p = this.Verify<OrderedDitherPaletteProcessor<Rgba32>>(this.rect);
+            OrderedDitherPaletteProcessor p = this.Verify<OrderedDitherPaletteProcessor>(this.rect);
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(NamedColors<Rgba32>.WebSafePalette, p.Palette);
+            Assert.Equal(Color.WebSafePalette, p.Palette);
         }
         [Fact]
         public void Dither_index_CorrectProcessor()
         {
             this.operations.Dither(this.orderedDither, this.TestPalette);
-            OrderedDitherPaletteProcessor<Rgba32> p = this.Verify<OrderedDitherPaletteProcessor<Rgba32>>();
+            OrderedDitherPaletteProcessor p = this.Verify<OrderedDitherPaletteProcessor>();
             Assert.Equal(this.orderedDither, p.Dither);
             Assert.Equal(this.TestPalette, p.Palette);
         }
@@ -57,7 +67,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void Dither_index_rect_CorrectProcessor()
         {
             this.operations.Dither(this.orderedDither, this.TestPalette, this.rect);
-            OrderedDitherPaletteProcessor<Rgba32> p = this.Verify<OrderedDitherPaletteProcessor<Rgba32>>(this.rect);
+            OrderedDitherPaletteProcessor p = this.Verify<OrderedDitherPaletteProcessor>(this.rect);
             Assert.Equal(this.orderedDither, p.Dither);
             Assert.Equal(this.TestPalette, p.Palette);
         }
@@ -67,27 +77,27 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void Dither_ErrorDiffuser_CorrectProcessor()
         {
             this.operations.Diffuse(this.errorDiffuser, .4F);
-            ErrorDiffusionPaletteProcessor<Rgba32> p = this.Verify<ErrorDiffusionPaletteProcessor<Rgba32>>();
+            ErrorDiffusionPaletteProcessor p = this.Verify<ErrorDiffusionPaletteProcessor>();
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.4F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.WebSafePalette, p.Palette);
+            Assert.Equal(Color.WebSafePalette, p.Palette);
         }
 
         [Fact]
         public void Dither_ErrorDiffuser_rect_CorrectProcessor()
         {
             this.operations.Diffuse(this.errorDiffuser, .3F, this.rect);
-            ErrorDiffusionPaletteProcessor<Rgba32> p = this.Verify<ErrorDiffusionPaletteProcessor<Rgba32>>(this.rect);
+            ErrorDiffusionPaletteProcessor p = this.Verify<ErrorDiffusionPaletteProcessor>(this.rect);
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.3F, p.Threshold);
-            Assert.Equal(NamedColors<Rgba32>.WebSafePalette, p.Palette);
+            Assert.Equal(Color.WebSafePalette, p.Palette);
         }
 
         [Fact]
         public void Dither_ErrorDiffuser_CorrectProcessorWithColors()
         {
             this.operations.Diffuse(this.errorDiffuser, .5F, this.TestPalette);
-            ErrorDiffusionPaletteProcessor<Rgba32> p = this.Verify<ErrorDiffusionPaletteProcessor<Rgba32>>();
+            ErrorDiffusionPaletteProcessor p = this.Verify<ErrorDiffusionPaletteProcessor>();
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.5F, p.Threshold);
             Assert.Equal(this.TestPalette, p.Palette);
@@ -97,7 +107,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
         public void Dither_ErrorDiffuser_rect_CorrectProcessorWithColors()
         {
             this.operations.Diffuse(this.errorDiffuser, .5F, this.TestPalette, this.rect);
-            ErrorDiffusionPaletteProcessor<Rgba32> p = this.Verify<ErrorDiffusionPaletteProcessor<Rgba32>>(this.rect);
+            ErrorDiffusionPaletteProcessor p = this.Verify<ErrorDiffusionPaletteProcessor>(this.rect);
             Assert.Equal(this.errorDiffuser, p.Diffuser);
             Assert.Equal(.5F, p.Threshold);
             Assert.Equal(this.TestPalette, p.Palette);

From fddae8734a48c5c157ce5682cea22fe2a251b724 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Tue, 7 May 2019 19:58:14 +0200
Subject: [PATCH 146/223] Add support for encoding 8-bit bitmaps

---
 src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs |  7 ++-
 src/ImageSharp/Formats/Bmp/BmpEncoder.cs      |  1 -
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  | 60 ++++++++++++++++++-
 .../Formats/Bmp/IBmpEncoderOptions.cs         |  1 -
 .../Quantization/QuantizedFrame{TPixel}.cs    |  2 +-
 .../Formats/Bmp/BmpEncoderTests.cs            |  9 ++-
 tests/ImageSharp.Tests/TestImages.cs          |  1 +
 .../TestUtilities/PixelTypes.cs               |  2 +
 tests/Images/Input/Bmp/pal8gs.bmp             |  3 +
 9 files changed, 79 insertions(+), 7 deletions(-)
 create mode 100644 tests/Images/Input/Bmp/pal8gs.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs b/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
index 38f5c1d662..6e1145beb7 100644
--- a/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpBitsPerPixel.cs
@@ -4,10 +4,15 @@
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
-    /// Enumerates the available bits per pixel for bitmap.
+    /// Enumerates the available bits per pixel the bitmap encoder supports.
     /// </summary>
     public enum BmpBitsPerPixel : short
     {
+        /// <summary>
+        /// 8 bits per pixel. Each pixel consists of 1 byte.
+        /// </summary>
+        Pixel8 = 8,
+
         /// <summary>
         /// 16 bits per pixel. Each pixel consists of 2 bytes.
         /// </summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
index 4efdedb349..f3eb9282ce 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
@@ -10,7 +10,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Image encoder for writing an image to a stream as a Windows bitmap.
     /// </summary>
-    /// <remarks>The encoder can currently only write 24-bit rgb images to streams.</remarks>
     public sealed class BmpEncoder : IImageEncoder, IBmpEncoderOptions
     {
         /// <summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 82483e3902..530bcf8cd2 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -9,6 +9,7 @@ using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.Formats.Bmp
@@ -43,6 +44,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private const int Rgba32BlueMask = 0xFF;
 
+        /// <summary>
+        /// The color palette for an 8 bit image will have 256 entry's with 4 bytes for each entry.
+        /// </summary>
+        private const int ColorPaletteSize8Bit = 1024;
+
         private readonly MemoryAllocator memoryAllocator;
 
         private Configuration configuration;
@@ -142,11 +148,13 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 infoHeader.Compression = BmpCompression.BitFields;
             }
 
+            int colorPaletteSize = this.bitsPerPixel == BmpBitsPerPixel.Pixel8 ? ColorPaletteSize8Bit : 0;
+
             var fileHeader = new BmpFileHeader(
                 type: BmpConstants.TypeMarkers.Bitmap,
                 fileSize: BmpFileHeader.Size + infoHeaderSize + infoHeader.ImageSize,
                 reserved: 0,
-                offset: BmpFileHeader.Size + infoHeaderSize);
+                offset: BmpFileHeader.Size + infoHeaderSize + colorPaletteSize);
 
 #if NETCOREAPP2_1
             Span<byte> buffer = stackalloc byte[infoHeaderSize];
@@ -198,6 +206,10 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 case BmpBitsPerPixel.Pixel16:
                     this.Write16Bit(stream, pixels);
                     break;
+
+                case BmpBitsPerPixel.Pixel8:
+                    this.Write8Bit(stream, image);
+                    break;
             }
         }
 
@@ -276,5 +288,51 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 }
             }
         }
+
+        /// <summary>
+        /// Writes an 8 Bit image with a color palette. The color palette has 256 entry's with 4 bytes for each entry.
+        /// </summary>
+        /// <typeparam name="TPixel">The type of the pixel.</typeparam>
+        /// <param name="stream">The <see cref="Stream"/> to write to.</param>
+        /// <param name="image"> The <see cref="ImageFrame{TPixel}"/> containing pixel data.</param>
+        private void Write8Bit<TPixel>(Stream stream, ImageFrame<TPixel> image)
+            where TPixel : struct, IPixel<TPixel>
+        {
+#if NETCOREAPP2_1
+            Span<byte> colorPalette = stackalloc byte[ColorPaletteSize8Bit];
+#else
+            byte[] colorPalette = new byte[ColorPaletteSize8Bit];
+#endif
+
+            var quantizer = new WuQuantizer(256);
+            QuantizedFrame<TPixel> quantized = quantizer.CreateFrameQuantizer<TPixel>(this.configuration).QuantizeFrame(image);
+
+            int idx = 0;
+            var color = default(Rgba32);
+            foreach (TPixel quantizedColor in quantized.Palette)
+            {
+                quantizedColor.ToRgba32(ref color);
+                colorPalette[idx] = color.B;
+                colorPalette[idx + 1] = color.G;
+                colorPalette[idx + 2] = color.R;
+
+                // Padding byte, always 0
+                colorPalette[idx + 3] = 0;
+                idx += 4;
+            }
+
+            stream.Write(colorPalette, 0, ColorPaletteSize8Bit);
+
+            for (int y = image.Height - 1; y >= 0; y--)
+            {
+                Span<byte> pixelSpan = quantized.GetRowSpan(y);
+                stream.Write(pixelSpan);
+
+                for (int i = 0; i < this.padding; i++)
+                {
+                    stream.WriteByte(0);
+                }
+            }
+        }
     }
 }
diff --git a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
index 96ec423e7b..92ff092705 100644
--- a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
+++ b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
@@ -6,7 +6,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <summary>
     /// Configuration options for use during bmp encoding
     /// </summary>
-    /// <remarks>The encoder can currently only write 16-bit, 24-bit and 32-bit rgb images to streams.</remarks>
     internal interface IBmpEncoderOptions
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
index 38862ef446..30b8bc8469 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 
         /// <summary>
         /// Gets the representation of the pixels as a <see cref="Span{T}"/> of contiguous memory
-        /// at row <paramref name="rowIndex"/> beginning from the the first pixel on that row.
+        /// at row <paramref name="rowIndex"/> beginning from the first pixel on that row.
         /// </summary>
         /// <param name="rowIndex">The row.</param>
         /// <returns>The <see cref="Span{T}"/></returns>
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 7e054734e3..42ec3088d9 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -114,6 +114,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
         [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
         [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
+        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             // if supportTransparency is false, a v3 bitmap header will be written
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
@@ -126,11 +128,14 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
         [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
         [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
+        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
+        [WithFile(Bit32Rgba, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         public void Encode_PreservesAlpha<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
@@ -139,8 +144,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                // There is no alpha in bmp with 24 bits per pixels, so the reference image will be made opaque.
-                if (bitsPerPixel == BmpBitsPerPixel.Pixel24)
+                // There is no alpha in bmp with less then 32 bits per pixels, so the reference image will be made opaque.
+                if (bitsPerPixel != BmpBitsPerPixel.Pixel32)
                 {
                     image.Mutate(c => c.MakeOpaque());
                 }
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index f82278ef5d..62b7ae2ec0 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -236,6 +236,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit1Pal1 = "Bmp/pal1p1.bmp";
             public const string Bit4 = "Bmp/pal4.bmp";
             public const string Bit8 = "Bmp/test8.bmp";
+            public const string Bit8Gs = "Bmp/pal8gs.bmp";
             public const string Bit8Inverted = "Bmp/test8-inverted.bmp";
             public const string Bit16 = "Bmp/test16.bmp";
             public const string Bit16Inverted = "Bmp/test16-inverted.bmp";
diff --git a/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs b/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
index e4a7572d60..78431f31aa 100644
--- a/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/PixelTypes.cs
@@ -60,6 +60,8 @@ namespace SixLabors.ImageSharp.Tests
 
         Bgra5551 = 1 << 22,
 
+        Gray8 = 1 << 23,
+
         // TODO: Add multi-flag entries by rules defined in PackedPixelConverterHelper
 
         // "All" is handled as a separate, individual case instead of using bitwise OR
diff --git a/tests/Images/Input/Bmp/pal8gs.bmp b/tests/Images/Input/Bmp/pal8gs.bmp
new file mode 100644
index 0000000000..359499c7a5
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8gs.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:abb09008dc6af0b33db70ed01e4183f946cc90b647bd84b078794b2d97eb9c33
+size 9254

From fc9c716ece921fb76c1eebc13ab875aa1ce441cf Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Tue, 7 May 2019 20:43:12 +0200
Subject: [PATCH 147/223] Changed WuQuantizer to OctreeQuantizer

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 530bcf8cd2..0ef2046a84 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -304,7 +304,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             byte[] colorPalette = new byte[ColorPaletteSize8Bit];
 #endif
 
-            var quantizer = new WuQuantizer(256);
+            var quantizer = new OctreeQuantizer(256);
             QuantizedFrame<TPixel> quantized = quantizer.CreateFrameQuantizer<TPixel>(this.configuration).QuantizeFrame(image);
 
             int idx = 0;

From b902246a29ce163256b8b37e436e96ac387f65e9 Mon Sep 17 00:00:00 2001
From: SLane35 <SLane35@users.noreply.github.com>
Date: Thu, 9 May 2019 02:46:40 +0300
Subject: [PATCH 148/223] Update Readme (#905)

A few minor grammatical corrections.
---
 README.md | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index ceb28564b9..515fc71969 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Designed to democratize image processing, ImageSharp brings you an incredibly po
 
 Compared to `System.Drawing` we have been able to develop something much more flexible, easier to code against, and much, much less prone to memory leaks. Gone are system-wide process-locks; ImageSharp images are thread-safe and fully supported in web environments.
 
-Built against .NET Standard 1.3 ImageSharp can be used in device, cloud, and embedded/IoT scenarios. 
+Built against .NET Standard 1.3, ImageSharp can be used in device, cloud, and embedded/IoT scenarios. 
 
 ### Documentation
 For all SixLabors projects, including ImageSharp:
@@ -41,15 +41,15 @@ Install stable releases via Nuget; development releases are available via MyGet.
 
 The **ImageSharp** library is made up of multiple packages:
 - **SixLabors.ImageSharp**
-  - Contains the generic `Image<TPixel>` class, PixelFormats, Primitives, Configuration, and other core functionality.
-  - The `IImageFormat` interface, Jpeg, Png, Bmp, and Gif formats.
-  - Transform methods like Resize, Crop, Skew, Rotate - Anything that alters the dimensions of the image.
-  - Non-transform methods like Gaussian Blur, Pixelate, Edge Detection - Anything that maintains the original image dimensions.
+  - Contains the generic `Image<TPixel>` class, PixelFormats, Primitives, Configuration, and other core functionality
+  - The `IImageFormat` interface, Jpeg, Png, Bmp, and Gif formats
+  - Transform methods like Resize, Crop, Skew, Rotate - anything that alters the dimensions of the image
+  - Non-transform methods like Gaussian Blur, Pixelate, Edge Detection - anything that maintains the original image dimensions
 
 - **SixLabors.ImageSharp.Drawing**
-  - Brushes and various drawing algorithms, including drawing images.
+  - Brushes and various drawing algorithms, including drawing images
   - Various vector drawing methods for drawing paths, polygons etc.
-  - Text drawing.
+  - Text drawing
 
 ### Build Status
 
@@ -117,7 +117,7 @@ Alternatively, you can work from command line and/or with a lightweight editor o
 - [Visual Studio Code](https://code.visualstudio.com/) with [C# Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.csharp)
 - [.NET Core](https://www.microsoft.com/net/core#linuxubuntu)
 
-To clone ImageSharp locally click the "Clone in Windows" button above or run the following git commands.
+To clone ImageSharp locally, click the "Clone in Windows" button above or run the following git commands:
 
 ```bash
 git clone https://github.com/SixLabors/ImageSharp

From 75d5bd812e917398ae90e16917ac6fcf154e0ee0 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Thu, 9 May 2019 20:35:19 +0200
Subject: [PATCH 149/223] Trying MagickReferenceDecoder for the 8bit greyscale
 image encoder tests

---
 .../Formats/Bmp/BmpEncoderTests.cs            | 50 +++++++++++++++----
 1 file changed, 39 insertions(+), 11 deletions(-)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 42ec3088d9..a56cee47d8 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -2,10 +2,13 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
+
+using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs;
 
 using Xunit;
 using Xunit.Abstractions;
@@ -110,13 +113,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [WithFile(Bit32Rgba, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv4, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
-        // WinBmpv3 is a 24 bits per pixel image
-        [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
-        [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
-        [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
-        [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
-        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
-        public void Encode_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+        public void Encode_32Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             // if supportTransparency is false, a v3 bitmap header will be written
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
 
@@ -125,13 +122,44 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [WithFile(Bit32Rgba, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv4, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
         [WithFile(WinBmpv5, PixelTypes.Rgba32 | PixelTypes.Rgb24, BmpBitsPerPixel.Pixel32)]
+        public void Encode_32Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+
+        [Theory]
+        // WinBmpv3 is a 24 bits per pixel image
+        [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        public void Encode_24Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
+
+        [Theory]
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        public void Encode_24Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+
+
+        [Theory]
+        [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        public void Encode_16Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
+
+        [Theory]
         [WithFile(Rgb16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
         [WithFile(Bit16, PixelTypes.Bgra5551, BmpBitsPerPixel.Pixel16)]
+        public void Encode_16Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+
+        [Theory]
         [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
         [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
-        public void Encode_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
-            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
+        public void Encode_8Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false, referenceDecoder: new MagickReferenceDecoder());
+
+        [Theory]
+        [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
+        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
+        public void Encode_8Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true, referenceDecoder: new MagickReferenceDecoder());
 
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
@@ -139,7 +167,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         public void Encode_PreservesAlpha<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
-        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true)
+        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true, IImageDecoder referenceDecoder = null)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
@@ -153,7 +181,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 var encoder = new BmpEncoder { BitsPerPixel = bitsPerPixel, SupportTransparency = supportTransparency };
 
                 // Does DebugSave & load reference CompareToReferenceInput():
-                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder);
+                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder, referenceDecoder: referenceDecoder);
             }
         }
     }

From 1140910d84c4bd23df5fb91507717d35139b69ed Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Thu, 9 May 2019 22:07:04 +0200
Subject: [PATCH 150/223] Setting dither to false in the OctreeQuantizer

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs   |  2 +-
 .../Processors/Quantization/OctreeQuantizer.cs | 18 ++++++++++++++----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 0ef2046a84..be82e2cab3 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -304,7 +304,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             byte[] colorPalette = new byte[ColorPaletteSize8Bit];
 #endif
 
-            var quantizer = new OctreeQuantizer(256);
+            var quantizer = new OctreeQuantizer(dither: false, maxColors: 256);
             QuantizedFrame<TPixel> quantized = quantizer.CreateFrameQuantizer<TPixel>(this.configuration).QuantizeFrame(image);
 
             int idx = 0;
diff --git a/src/ImageSharp/Processing/Processors/Quantization/OctreeQuantizer.cs b/src/ImageSharp/Processing/Processors/Quantization/OctreeQuantizer.cs
index d49023886b..f5fa8c95d9 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/OctreeQuantizer.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/OctreeQuantizer.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Initializes a new instance of the <see cref="OctreeQuantizer"/> class.
         /// </summary>
-        /// <param name="dither">Whether to apply dithering to the output image</param>
+        /// <param name="dither">Whether to apply dithering to the output image.</param>
         public OctreeQuantizer(bool dither)
             : this(GetDiffuser(dither), QuantizerConstants.MaxColors)
         {
@@ -44,7 +44,17 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Initializes a new instance of the <see cref="OctreeQuantizer"/> class.
         /// </summary>
-        /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
+        /// <param name="maxColors">The maximum number of colors to hold in the color palette.</param>
+        /// <param name="dither">Whether to apply dithering to the output image.</param>
+        public OctreeQuantizer(bool dither, int maxColors)
+            : this(GetDiffuser(dither), maxColors)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="OctreeQuantizer"/> class.
+        /// </summary>
+        /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image.</param>
         public OctreeQuantizer(IErrorDiffuser diffuser)
             : this(diffuser, QuantizerConstants.MaxColors)
         {
@@ -53,8 +63,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Initializes a new instance of the <see cref="OctreeQuantizer"/> class.
         /// </summary>
-        /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
-        /// <param name="maxColors">The maximum number of colors to hold in the color palette</param>
+        /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image.</param>
+        /// <param name="maxColors">The maximum number of colors to hold in the color palette.</param>
         public OctreeQuantizer(IErrorDiffuser diffuser, int maxColors)
         {
             this.Diffuser = diffuser;

From a7720e53cbe9570fc56e251a44aa96b574a8d34c Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 9 May 2019 22:18:18 +0200
Subject: [PATCH 151/223] verbose naming for Histogram Equalization stuff +
 make it public

---
 ... AdaptiveHistogramEqualizationProcessor.cs} | 18 +++++++++++++-----
 ...eHistogramEqualizationProcessor{TPixel}.cs} |  6 +++---
 ...ogramEqualizationSlidingWindowProcessor.cs} | 16 ++++++++++++----
 ...alizationSlidingWindowProcessor{TPixel}.cs} |  6 +++---
 .../GlobalHistogramEqualizationProcessor.cs    |  8 +++++++-
 .../HistogramEqualizationProcessor.cs          |  6 +++---
 6 files changed, 41 insertions(+), 19 deletions(-)
 rename src/ImageSharp/Processing/Processors/Normalization/{AdaptiveHistEqualizationProcessor.cs => AdaptiveHistogramEqualizationProcessor.cs} (76%)
 rename src/ImageSharp/Processing/Processors/Normalization/{AdaptiveHistEqualizationProcessor{TPixel}.cs => AdaptiveHistogramEqualizationProcessor{TPixel}.cs} (98%)
 rename src/ImageSharp/Processing/Processors/Normalization/{AdaptiveHistEqualizationSWProcessor.cs => AdaptiveHistogramEqualizationSlidingWindowProcessor.cs} (72%)
 rename src/ImageSharp/Processing/Processors/Normalization/{AdaptiveHistEqualizationSWProcessor{TPixel}.cs => AdaptiveHistogramEqualizationSlidingWindowProcessor{TPixel}.cs} (98%)

diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor.cs
similarity index 76%
rename from src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
rename to src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor.cs
index 4fd0f853d0..ad27ae020c 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor.cs
@@ -7,17 +7,21 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// Applies an adaptive histogram equalization to the image. The image is split up in tiles. For each tile a cumulative distribution function (cdf) is calculated.
     /// To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.
     /// </summary>
-    internal class AdaptiveHistEqualizationProcessor : HistogramEqualizationProcessor
+    public class AdaptiveHistogramEqualizationProcessor : HistogramEqualizationProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistogramEqualizationProcessor"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         /// <param name="numberOfTiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int numberOfTiles)
+        public AdaptiveHistogramEqualizationProcessor(
+            int luminanceLevels,
+            bool clipHistogram,
+            float clipLimitPercentage,
+            int numberOfTiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
             this.NumberOfTiles = numberOfTiles;
@@ -31,7 +35,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            return new AdaptiveHistEqualizationProcessor<TPixel>(this.LuminanceLevels, this.ClipHistogram, this.ClipLimitPercentage, this.NumberOfTiles);
+            return new AdaptiveHistogramEqualizationProcessor<TPixel>(
+                this.LuminanceLevels,
+                this.ClipHistogram,
+                this.ClipLimitPercentage,
+                this.NumberOfTiles);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor{TPixel}.cs
similarity index 98%
rename from src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs
rename to src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor{TPixel}.cs
index 930c4010fa..333444eb39 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationProcessor{TPixel}.cs
@@ -21,18 +21,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// To calculate the final equalized pixel value, the cdf value of four adjacent tiles will be interpolated.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AdaptiveHistEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+    internal class AdaptiveHistogramEqualizationProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistogramEqualizationProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+        public AdaptiveHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
             Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor.cs
similarity index 72%
rename from src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
rename to src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor.cs
index cd4a9644ff..36f798975a 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor.cs
@@ -6,17 +6,21 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// <summary>
     /// Applies an adaptive histogram equalization to the image using an sliding window approach.
     /// </summary>
-    internal class AdaptiveHistEqualizationSWProcessor : HistogramEqualizationProcessor
+    public class AdaptiveHistogramEqualizationSlidingWindowProcessor : HistogramEqualizationProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistogramEqualizationSlidingWindowProcessor"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         /// <param name="numberOfTiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int numberOfTiles)
+        public AdaptiveHistogramEqualizationSlidingWindowProcessor(
+            int luminanceLevels,
+            bool clipHistogram,
+            float clipLimitPercentage,
+            int numberOfTiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
             this.NumberOfTiles = numberOfTiles;
@@ -30,7 +34,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         /// <inheritdoc />
         public override IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
         {
-            return new AdaptiveHistEqualizationSWProcessor<TPixel>(this.LuminanceLevels, this.ClipHistogram, this.ClipLimitPercentage, this.NumberOfTiles);
+            return new AdaptiveHistogramEqualizationSlidingWindowProcessor<TPixel>(
+                this.LuminanceLevels,
+                this.ClipHistogram,
+                this.ClipLimitPercentage,
+                this.NumberOfTiles);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor{TPixel}.cs
similarity index 98%
rename from src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs
rename to src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor{TPixel}.cs
index 3584b1a88b..40e2d41d9b 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistEqualizationSWProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/AdaptiveHistogramEqualizationSlidingWindowProcessor{TPixel}.cs
@@ -20,18 +20,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// Applies an adaptive histogram equalization to the image using an sliding window approach.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AdaptiveHistEqualizationSWProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
+    internal class AdaptiveHistogramEqualizationSlidingWindowProcessor<TPixel> : HistogramEqualizationProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="AdaptiveHistEqualizationSWProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="AdaptiveHistogramEqualizationSlidingWindowProcessor{TPixel}"/> class.
         /// </summary>
         /// <param name="luminanceLevels">The number of different luminance levels. Typical values are 256 for 8-bit grayscale images
         /// or 65536 for 16-bit grayscale images.</param>
         /// <param name="clipHistogram">Indicating whether to clip the histogram bins at a specific value.</param>
         /// <param name="clipLimitPercentage">Histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         /// <param name="tiles">The number of tiles the image is split into (horizontal and vertically). Minimum value is 2. Maximum value is 100.</param>
-        public AdaptiveHistEqualizationSWProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
+        public AdaptiveHistogramEqualizationSlidingWindowProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage, int tiles)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
             Guard.MustBeGreaterThanOrEqualTo(tiles, 2, nameof(tiles));
diff --git a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
index 62e0185950..9af2c8352b 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/GlobalHistogramEqualizationProcessor.cs
@@ -6,8 +6,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// <summary>
     /// Defines a global histogram equalization applicable to an <see cref="Image"/>.
     /// </summary>
-    internal class GlobalHistogramEqualizationProcessor : HistogramEqualizationProcessor
+    public class GlobalHistogramEqualizationProcessor : HistogramEqualizationProcessor
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GlobalHistogramEqualizationProcessor"/> class.
+        /// </summary>
+        /// <param name="luminanceLevels">The number of luminance levels.</param>
+        /// <param name="clipHistogram">A value indicating whether to clip the histogram bins at a specific value.</param>
+        /// <param name="clipLimitPercentage">The histogram clip limit in percent of the total pixels in the tile. Histogram bins which exceed this limit, will be capped at this value.</param>
         public GlobalHistogramEqualizationProcessor(int luminanceLevels, bool clipHistogram, float clipLimitPercentage)
             : base(luminanceLevels, clipHistogram, clipLimitPercentage)
         {
diff --git a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
index 4aad1f564e..b1d12f8478 100644
--- a/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationProcessor.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
     /// <summary>
     /// Defines a processor that normalizes the histogram of an image.
     /// </summary>
-    internal abstract class HistogramEqualizationProcessor : IImageProcessor
+    public abstract class HistogramEqualizationProcessor : IImageProcessor
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="HistogramEqualizationProcessor"/> class.
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
                     break;
 
                 case HistogramEqualizationMethod.AdaptiveTileInterpolation:
-                    processor = new AdaptiveHistEqualizationProcessor(
+                    processor = new AdaptiveHistogramEqualizationProcessor(
                         options.LuminanceLevels,
                         options.ClipHistogram,
                         options.ClipLimitPercentage,
@@ -71,7 +71,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
                     break;
 
                 case HistogramEqualizationMethod.AdaptiveSlidingWindow:
-                    processor = new AdaptiveHistEqualizationSWProcessor(
+                    processor = new AdaptiveHistogramEqualizationSlidingWindowProcessor(
                         options.LuminanceLevels,
                         options.ClipHistogram,
                         options.ClipLimitPercentage,

From b92731896daab0ff627c7a8e65b07a4ec8f3bffb Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 9 May 2019 22:32:27 +0200
Subject: [PATCH 152/223] formatting

---
 .../AffineTransformProcessor{TPixel}.cs       | 21 ++++--
 .../Transforms/AutoOrientProcessor{TPixel}.cs |  5 +-
 .../ProjectiveTransformProcessor{TPixel}.cs   | 27 ++++++--
 .../Transforms/RotateProcessor{TPixel}.cs     | 68 +++++++++++--------
 4 files changed, 80 insertions(+), 41 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
index e57ce826bd..5a043cb207 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
@@ -25,18 +25,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             this.Definition = definition;
         }
 
+        protected AffineTransformProcessor Definition { get; }
+
         private Size TargetDimensions => this.Definition.TargetDimensions;
 
         private Matrix3x2 TransformMatrix => this.Definition.TransformMatrix;
 
-        protected AffineTransformProcessor Definition { get; }
-
         /// <inheritdoc/>
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(
+                x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
             return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
@@ -111,10 +111,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                     // Use the single precision position to calculate correct bounding pixels
                                     // otherwise we get rogue pixels outside of the bounds.
                                     var point = Vector2.Transform(new Vector2(x, y), matrix);
-                                    kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
+                                    kernel.Convolve(
+                                        point,
+                                        x,
+                                        ref ySpanRef,
+                                        ref xSpanRef,
+                                        source.PixelBuffer,
+                                        vectorSpan);
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(
+                                    configuration,
+                                    vectorSpan,
+                                    targetRowSpan);
                             }
                         });
             }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
index 257c223dc4..8b3ec8690e 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor{TPixel}.cs
@@ -61,7 +61,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> sourceBase, Rectangle sourceRectangle, Configuration config)
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> sourceBase,
+            Rectangle sourceRectangle,
+            Configuration config)
         {
             // All processing happens at the image level within BeforeImageApply();
         }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
index e6d885803b..ab07040f71 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
@@ -33,15 +33,23 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames =
-                source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions.Width, this.TargetDimensions.Height, x.Metadata.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(
+                x => new ImageFrame<TPixel>(
+                    source.GetConfiguration(),
+                    this.TargetDimensions.Width,
+                    this.TargetDimensions.Height,
+                    x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
             return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
         }
 
         /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            ImageFrame<TPixel> destination,
+            Rectangle sourceRectangle,
+            Configuration configuration)
         {
             Matrix4x4 transformMatrix = this.definition.TransformMatrix;
 
@@ -110,10 +118,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                                     // Use the single precision position to calculate correct bounding pixels
                                     // otherwise we get rogue pixels outside of the bounds.
                                     Vector2 point = TransformUtils.ProjectiveTransform2D(x, y, matrix);
-                                    kernel.Convolve(point, x, ref ySpanRef, ref xSpanRef, source.PixelBuffer, vectorSpan);
+                                    kernel.Convolve(
+                                        point,
+                                        x,
+                                        ref ySpanRef,
+                                        ref xSpanRef,
+                                        source.PixelBuffer,
+                                        vectorSpan);
                                 }
 
-                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, vectorSpan, targetRowSpan);
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(
+                                    configuration,
+                                    vectorSpan,
+                                    targetRowSpan);
                             }
                         });
             }
diff --git a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs
index aac6f65148..252cb77aba 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor{TPixel}.cs
@@ -27,18 +27,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         private float Degrees { get; }
 
         /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Rectangle sourceRectangle, Configuration configuration)
-        {
-            if (this.OptimizedApply(source, destination, configuration))
-            {
-                return;
-            }
-
-            base.OnFrameApply(source, destination, sourceRectangle, configuration);
-        }
-
-        /// <inheritdoc/>
-        protected override void AfterImageApply(Image<TPixel> source, Image<TPixel> destination, Rectangle sourceRectangle)
+        protected override void AfterImageApply(
+            Image<TPixel> source,
+            Image<TPixel> destination,
+            Rectangle sourceRectangle)
         {
             ExifProfile profile = destination.Metadata.ExifProfile;
             if (profile is null)
@@ -57,6 +49,21 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             base.AfterImageApply(source, destination, sourceRectangle);
         }
 
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            ImageFrame<TPixel> destination,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            if (this.OptimizedApply(source, destination, configuration))
+            {
+                return;
+            }
+
+            base.OnFrameApply(source, destination, sourceRectangle, configuration);
+        }
+
         /// <summary>
         /// Wraps a given angle in degrees so that it falls withing the 0-360 degree range
         /// </summary>
@@ -83,7 +90,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <returns>
         /// The <see cref="bool" />
         /// </returns>
-        private bool OptimizedApply(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        private bool OptimizedApply(
+            ImageFrame<TPixel> source,
+            ImageFrame<TPixel> destination,
+            Configuration configuration)
         {
             // Wrap the degrees to keep within 0-360 so we can apply optimizations when possible.
             float degrees = WrapDegrees(this.Degrees);
@@ -117,16 +127,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         }
 
         /// <summary>
-        /// Rotates the image 270 degrees clockwise at the centre point.
+        /// Rotates the image 180 degrees clockwise at the centre point.
         /// </summary>
         /// <param name="source">The source image.</param>
         /// <param name="destination">The destination image.</param>
         /// <param name="configuration">The configuration.</param>
-        private void Rotate270(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        private void Rotate180(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
         {
             int width = source.Width;
             int height = source.Height;
-            Rectangle destinationBounds = destination.Bounds();
 
             ParallelHelper.IterateRows(
                 source.Bounds(),
@@ -136,31 +145,27 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                         for (int y = rows.Min; y < rows.Max; y++)
                         {
                             Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
+                            Span<TPixel> targetRow = destination.GetPixelRowSpan(height - y - 1);
+
                             for (int x = 0; x < width; x++)
                             {
-                                int newX = height - y - 1;
-                                newX = height - newX - 1;
-                                int newY = width - x - 1;
-
-                                if (destinationBounds.Contains(newX, newY))
-                                {
-                                    destination[newX, newY] = sourceRow[x];
-                                }
+                                targetRow[width - x - 1] = sourceRow[x];
                             }
                         }
                     });
         }
 
         /// <summary>
-        /// Rotates the image 180 degrees clockwise at the centre point.
+        /// Rotates the image 270 degrees clockwise at the centre point.
         /// </summary>
         /// <param name="source">The source image.</param>
         /// <param name="destination">The destination image.</param>
         /// <param name="configuration">The configuration.</param>
-        private void Rotate180(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
+        private void Rotate270(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Configuration configuration)
         {
             int width = source.Width;
             int height = source.Height;
+            Rectangle destinationBounds = destination.Bounds();
 
             ParallelHelper.IterateRows(
                 source.Bounds(),
@@ -170,11 +175,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
                         for (int y = rows.Min; y < rows.Max; y++)
                         {
                             Span<TPixel> sourceRow = source.GetPixelRowSpan(y);
-                            Span<TPixel> targetRow = destination.GetPixelRowSpan(height - y - 1);
-
                             for (int x = 0; x < width; x++)
                             {
-                                targetRow[width - x - 1] = sourceRow[x];
+                                int newX = height - y - 1;
+                                newX = height - newX - 1;
+                                int newY = width - x - 1;
+
+                                if (destinationBounds.Contains(newX, newY))
+                                {
+                                    destination[newX, newY] = sourceRow[x];
+                                }
                             }
                         }
                     });

From 2168ecbb05c36eff9af4f134d271099caf3f2ee4 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 9 May 2019 23:39:05 +0200
Subject: [PATCH 153/223] refactor of Overlays

---
 src/ImageSharp/Color/Color.cs                 |   2 +
 src/ImageSharp/Primitives/ValueSize.cs        |   2 +-
 .../Processing/BackgroundColorExtensions.cs   |  45 ++++---
 src/ImageSharp/Processing/GlowExtensions.cs   |  98 +++++++-------
 .../Filters/LomographProcessor{TPixel}.cs     |   4 +-
 .../Filters/PolaroidProcessor{TPixel}.cs      |  14 +-
 .../Overlays/BackgroundColorProcessor.cs      |  86 ++----------
 .../BackgroundColorProcessor{TPixel}.cs       | 101 ++++++++++++++
 .../Processors/Overlays/GlowProcessor.cs      | 125 ++++--------------
 .../Overlays/GlowProcessor{TPixel}.cs         | 112 ++++++++++++++++
 .../Processors/Overlays/VignetteProcessor.cs  | 120 +++--------------
 .../Overlays/VignetteProcessor{TPixel}.cs     | 114 ++++++++++++++++
 .../Processing/VignetteExtensions.cs          | 121 ++++++++++-------
 tests/ImageSharp.Benchmarks/Samplers/Glow.cs  |   4 +-
 .../ImageSharp.Tests/Drawing/BeziersTests.cs  |   6 +-
 .../ImageSharp.Tests/Drawing/DrawImageTest.cs |   2 +-
 .../ImageSharp.Tests/Drawing/DrawPathTests.cs |   8 +-
 .../Drawing/LineComplexPolygonTests.cs        |  17 ++-
 tests/ImageSharp.Tests/Drawing/LineTests.cs   |  33 ++---
 .../ImageSharp.Tests/Drawing/PolygonTests.cs  |   9 +-
 .../Drawing/SolidBezierTests.cs               |  16 +--
 .../Drawing/SolidComplexPolygonTests.cs       |   9 +-
 .../Drawing/SolidPolygonTests.cs              |  25 ++--
 .../Processing/Effects/BackgroundColorTest.cs |  24 ++--
 .../Processing/Overlays/GlowTest.cs           |  16 +--
 .../Processing/Overlays/VignetteTest.cs       |  18 +--
 .../Processors/Effects/BackgroundColorTest.cs |   4 +-
 .../Processors/Overlays/GlowTest.cs           |   6 +-
 .../Processors/Overlays/OverlayTestBase.cs    |  13 +-
 .../Processors/Overlays/VignetteTest.cs       |   6 +-
 30 files changed, 652 insertions(+), 508 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Overlays/GlowProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor{TPixel}.cs

diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index bc97393cc1..021cea4159 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -86,6 +86,8 @@ namespace SixLabors.ImageSharp
 
         public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
 
+        public static Color FromRgb(byte r, byte g, byte b) => FromRgba(r, g, b, 255);
+
         /// <summary>
         /// Creates a new <see cref="Color"/> instance from the string representing a color in hexadecimal form.
         /// </summary>
diff --git a/src/ImageSharp/Primitives/ValueSize.cs b/src/ImageSharp/Primitives/ValueSize.cs
index 44bee50309..577e9187a6 100644
--- a/src/ImageSharp/Primitives/ValueSize.cs
+++ b/src/ImageSharp/Primitives/ValueSize.cs
@@ -7,7 +7,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Primitives
 {
     /// <summary>
-    /// Represents a value in relation to a value on the image
+    /// Represents a value in relation to a value on the image.
     /// </summary>
     internal readonly struct ValueSize : IEquatable<ValueSize>
     {
diff --git a/src/ImageSharp/Processing/BackgroundColorExtensions.cs b/src/ImageSharp/Processing/BackgroundColorExtensions.cs
index 3b794e3351..dd1cc1ed24 100644
--- a/src/ImageSharp/Processing/BackgroundColorExtensions.cs
+++ b/src/ImageSharp/Processing/BackgroundColorExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Overlays;
 using SixLabors.Primitives;
 
@@ -16,53 +15,55 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Replaces the background color of image with the given one.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the background.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BackgroundColor<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => BackgroundColor(source, GraphicsOptions.Default, color);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BackgroundColor(this IImageProcessingContext source, Color color) =>
+            BackgroundColor(source, GraphicsOptions.Default, color);
 
         /// <summary>
         /// Replaces the background color of image with the given one.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the background.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BackgroundColor<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => BackgroundColor(source, GraphicsOptions.Default, color, rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BackgroundColor(
+            this IImageProcessingContext source,
+            Color color,
+            Rectangle rectangle) =>
+            BackgroundColor(source, GraphicsOptions.Default, color, rectangle);
 
         /// <summary>
         /// Replaces the background color of image with the given one.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="color">The color to set as the background.</param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BackgroundColor<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BackgroundColorProcessor<TPixel>(color, options));
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BackgroundColor(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color) =>
+            source.ApplyProcessor(new BackgroundColorProcessor(color, options));
 
         /// <summary>
         /// Replaces the background color of image with the given one.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="color">The color to set as the background.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> BackgroundColor<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new BackgroundColorProcessor<TPixel>(color, options), rectangle);
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext BackgroundColor(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new BackgroundColorProcessor(color, options), rectangle);
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/GlowExtensions.cs b/src/ImageSharp/Processing/GlowExtensions.cs
index 759fdccbea..39734882b0 100644
--- a/src/ImageSharp/Processing/GlowExtensions.cs
+++ b/src/ImageSharp/Processing/GlowExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing.Processors.Overlays;
 using SixLabors.Primitives;
@@ -17,22 +16,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Glow(source, GraphicsOptions.Default);
+        public static IImageProcessingContext Glow(this IImageProcessingContext source) =>
+            Glow(source, GraphicsOptions.Default);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the glow.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Glow(this IImageProcessingContext source, Color color)
         {
             return Glow(source, GraphicsOptions.Default, color);
         }
@@ -40,31 +35,26 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radius">The the radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, float radius)
-            where TPixel : struct, IPixel<TPixel>
-            => Glow(source, GraphicsOptions.Default, radius);
+        public static IImageProcessingContext Glow(this IImageProcessingContext source, float radius) =>
+            Glow(source, GraphicsOptions.Default, radius);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(GraphicsOptions.Default, rectangle);
+        public static IImageProcessingContext Glow(this IImageProcessingContext source, Rectangle rectangle) =>
+            source.Glow(GraphicsOptions.Default, rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the glow.</param>
         /// <param name="radius">The the radius.</param>
@@ -72,63 +62,66 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float radius, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(GraphicsOptions.Default, color, ValueSize.Absolute(radius), rectangle);
+        public static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            Color color,
+            float radius,
+            Rectangle rectangle) =>
+            source.Glow(GraphicsOptions.Default, color, ValueSize.Absolute(radius), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(0.5f));
+        public static IImageProcessingContext Glow(this IImageProcessingContext source, GraphicsOptions options) =>
+            source.Glow(options, Color.Black, ValueSize.PercentageOfWidth(0.5f));
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(options, color, ValueSize.PercentageOfWidth(0.5f));
+        public static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color) =>
+            source.Glow(options, color, ValueSize.PercentageOfWidth(0.5f));
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="radius">The the radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, float radius)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.Absolute(radius));
+        public static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            float radius) =>
+            source.Glow(options, Color.Black, ValueSize.Absolute(radius));
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(0.5f), rectangle);
+        public static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Rectangle rectangle) =>
+            source.Glow(options, Color.Black, ValueSize.PercentageOfWidth(0.5f), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
@@ -137,14 +130,17 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float radius, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Glow(options, color, ValueSize.Absolute(radius), rectangle);
+        public static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float radius,
+            Rectangle rectangle) =>
+            source.Glow(options, color, ValueSize.Absolute(radius), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
@@ -153,21 +149,27 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        private static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radius, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new GlowProcessor<TPixel>(color, radius, options), rectangle);
+        private static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            ValueSize radius,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new GlowProcessor(color, radius, options), rectangle);
 
         /// <summary>
         /// Applies a radial glow effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting things like blending.</param>
         /// <param name="color">The color to set as the glow.</param>
         /// <param name="radius">The the radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        private static IImageProcessingContext<TPixel> Glow<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radius)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new GlowProcessor<TPixel>(color, radius, options));
+        private static IImageProcessingContext Glow(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            ValueSize radius) =>
+            source.ApplyProcessor(new GlowProcessor(color, radius, options));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
index c15cf6fc90..e0f85945aa 100644
--- a/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/LomographProcessor{TPixel}.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     internal class LomographProcessor<TPixel> : FilterProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private static readonly TPixel VeryDarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 10, 0, 255);
+        private static readonly Color VeryDarkGreen = Color.FromRgba(0, 10, 0, 255);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="LomographProcessor{TPixel}"/> class.
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         /// <inheritdoc/>
         protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
-            new VignetteProcessor<TPixel>(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
+            new VignetteProcessor(VeryDarkGreen).Apply(source, sourceRectangle, configuration);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
index befcfc1f42..0f511ee296 100644
--- a/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Filters/PolaroidProcessor{TPixel}.cs
@@ -13,8 +13,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
     internal class PolaroidProcessor<TPixel> : FilterProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private static readonly TPixel VeryDarkOrange = ColorBuilder<TPixel>.FromRGB(102, 34, 0);
-        private static readonly TPixel LightOrange = ColorBuilder<TPixel>.FromRGBA(255, 153, 102, 128);
+        private static readonly Color LightOrange = Color.FromRgba(255, 153, 102, 128);
+
+        private static readonly Color VeryDarkOrange = Color.FromRgb(102, 34, 0);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PolaroidProcessor{TPixel}"/> class.
@@ -26,10 +27,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Filters
         }
 
         /// <inheritdoc/>
-        protected override void AfterFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        protected override void AfterFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
         {
-            new VignetteProcessor<TPixel>(VeryDarkOrange).Apply(source, sourceRectangle, configuration);
-            new GlowProcessor<TPixel>(LightOrange, source.Width / 4F).Apply(source, sourceRectangle, configuration);
+            new VignetteProcessor(VeryDarkOrange).Apply(source, sourceRectangle, configuration);
+            new GlowProcessor(LightOrange, source.Width / 4F).Apply(source, sourceRectangle, configuration);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
index 25787ff922..0dd0c41188 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
@@ -1,31 +1,21 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Overlays
 {
     /// <summary>
-    /// Sets the background color of the image.
+    /// Defines a processing operation to replace the background color of an <see cref="Image"/>. 
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class BackgroundColorProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class BackgroundColorProcessor : IImageProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="BackgroundColorProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="BackgroundColorProcessor"/> class.
         /// </summary>
-        /// <param name="color">The <typeparamref name="TPixel"/> to set the background color to.</param>
+        /// <param name="color">The <see cref="Color"/> to set the background color to.</param>
         /// <param name="options">The options defining blending algorithm and amount.</param>
-        public BackgroundColorProcessor(TPixel color, GraphicsOptions options)
+        public BackgroundColorProcessor(Color color, GraphicsOptions options)
         {
             this.Color = color;
             this.GraphicsOptions = options;
@@ -39,69 +29,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         /// <summary>
         /// Gets the background color value.
         /// </summary>
-        public TPixel Color { get; }
+        public Color Color { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-
-            // Align start/end positions.
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(source.Width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(source.Height, endY);
-
-            // Reset offset if necessary.
-            if (minX > 0)
-            {
-                startX = 0;
-            }
-
-            if (minY > 0)
-            {
-                startY = 0;
-            }
-
-            int width = maxX - minX;
-
-            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
-            using (IMemoryOwner<TPixel> colors = source.MemoryAllocator.Allocate<TPixel>(width))
-            using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
-            {
-                // Be careful! Do not capture colorSpan & amountSpan in the lambda below!
-                Span<TPixel> colorSpan = colors.GetSpan();
-                Span<float> amountSpan = amount.GetSpan();
-
-                colorSpan.Fill(this.Color);
-                amountSpan.Fill(this.GraphicsOptions.BlendPercentage);
-
-                PixelBlender<TPixel> blender = PixelOperations<TPixel>.Instance.GetPixelBlender(this.GraphicsOptions);
-
-                ParallelHelper.IterateRows(
-                    workingRect,
-                    configuration,
-                    rows =>
-                        {
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                Span<TPixel> destination =
-                                    source.GetPixelRowSpan(y - startY).Slice(minX - startX, width);
-
-                                // This switched color & destination in the 2nd and 3rd places because we are applying the target color under the current one
-                                blender.Blend(
-                                    source.Configuration,
-                                    destination,
-                                    colors.GetSpan(),
-                                    destination,
-                                    amount.GetSpan());
-                            }
-                        });
-            }
+            return new BackgroundColorProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor{TPixel}.cs
new file mode 100644
index 0000000000..c4af59fecb
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor{TPixel}.cs
@@ -0,0 +1,101 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Overlays
+{
+    /// <summary>
+    /// Sets the background color of the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class BackgroundColorProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly BackgroundColorProcessor definition;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BackgroundColorProcessor{TPixel}"/> class.
+        /// </summary>
+        public BackgroundColorProcessor(BackgroundColorProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            TPixel color = this.definition.Color.ToPixel<TPixel>();
+            GraphicsOptions graphicsOptions = this.definition.GraphicsOptions;
+
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+
+            // Align start/end positions.
+            int minX = Math.Max(0, startX);
+            int maxX = Math.Min(source.Width, endX);
+            int minY = Math.Max(0, startY);
+            int maxY = Math.Min(source.Height, endY);
+
+            // Reset offset if necessary.
+            if (minX > 0)
+            {
+                startX = 0;
+            }
+
+            if (minY > 0)
+            {
+                startY = 0;
+            }
+
+            int width = maxX - minX;
+
+            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
+
+            using (IMemoryOwner<TPixel> colors = source.MemoryAllocator.Allocate<TPixel>(width))
+            using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
+            {
+                // Be careful! Do not capture colorSpan & amountSpan in the lambda below!
+                Span<TPixel> colorSpan = colors.GetSpan();
+                Span<float> amountSpan = amount.GetSpan();
+
+                colorSpan.Fill(color);
+                amountSpan.Fill(graphicsOptions.BlendPercentage);
+
+                PixelBlender<TPixel> blender = PixelOperations<TPixel>.Instance.GetPixelBlender(graphicsOptions);
+
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    configuration,
+                    rows =>
+                        {
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                Span<TPixel> destination =
+                                    source.GetPixelRowSpan(y - startY).Slice(minX - startX, width);
+
+                                // This switched color & destination in the 2nd and 3rd places because we are applying the target color under the current one
+                                blender.Blend(
+                                    source.Configuration,
+                                    destination,
+                                    colors.GetSpan(),
+                                    destination,
+                                    amount.GetSpan());
+                            }
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
index 21f6be69f8..4927a0ed7a 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
@@ -1,69 +1,56 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Numerics;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Overlays
 {
     /// <summary>
-    /// An <see cref="IImageProcessor{TPixel}"/> that applies a radial glow effect an <see cref="Image{TPixel}"/>.
+    /// Defines a radial glow effect applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class GlowProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class GlowProcessor : IImageProcessor
     {
-        private readonly PixelBlender<TPixel> blender;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>
         /// <param name="color">The color or the glow.</param>
-        public GlowProcessor(TPixel color)
+        public GlowProcessor(Color color)
             : this(color, 0)
         {
         }
 
+
         /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>
         /// <param name="color">The color or the glow.</param>
-        /// <param name="radius">The radius of the glow.</param>
-        public GlowProcessor(TPixel color, ValueSize radius)
-            : this(color, radius, GraphicsOptions.Default)
+        /// <param name="options">The options effecting blending and composition.</param>
+        public GlowProcessor(Color color, GraphicsOptions options)
+            : this(color, 0, options)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>
         /// <param name="color">The color or the glow.</param>
-        /// <param name="options">The options effecting blending and composition.</param>
-        public GlowProcessor(TPixel color, GraphicsOptions options)
-            : this(color, 0, options)
+        /// <param name="radius">The radius of the glow.</param>
+        internal GlowProcessor(Color color, ValueSize radius)
+            : this(color, radius, GraphicsOptions.Default)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="GlowProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>
         /// <param name="color">The color or the glow.</param>
         /// <param name="radius">The radius of the glow.</param>
         /// <param name="options">The options effecting blending and composition.</param>
-        public GlowProcessor(TPixel color, ValueSize radius, GraphicsOptions options)
+        internal GlowProcessor(Color color, ValueSize radius, GraphicsOptions options)
         {
             this.GlowColor = color;
             this.Radius = radius;
-            this.blender = PixelOperations<TPixel>.Instance.GetPixelBlender(options);
             this.GraphicsOptions = options;
         }
 
@@ -73,86 +60,20 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         public GraphicsOptions GraphicsOptions { get; }
 
         /// <summary>
-        /// Gets or sets the glow color to apply.
+        /// Gets the glow color to apply.
         /// </summary>
-        public TPixel GlowColor { get; set; }
+        public Color GlowColor { get; }
 
         /// <summary>
-        /// Gets or sets the the radius.
+        /// Gets the the radius.
         /// </summary>
-        public ValueSize Radius { get; set; }
+        internal ValueSize Radius { get;  }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            // TODO: can we simplify the rectangle calculation?
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-            TPixel glowColor = this.GlowColor;
-            Vector2 center = Rectangle.Center(sourceRectangle);
-
-            float finalRadius = this.Radius.Calculate(source.Size());
-
-            float maxDistance = finalRadius > 0 ? MathF.Min(finalRadius, sourceRectangle.Width * .5F) : sourceRectangle.Width * .5F;
-
-            // Align start/end positions.
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(source.Width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(source.Height, endY);
-
-            // Reset offset if necessary.
-            if (minX > 0)
-            {
-                startX = 0;
-            }
-
-            if (minY > 0)
-            {
-                startY = 0;
-            }
-
-            int width = maxX - minX;
-            int offsetX = minX - startX;
-
-            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
-            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
-            {
-                rowColors.GetSpan().Fill(glowColor);
-
-                ParallelHelper.IterateRowsWithTempBuffer<float>(
-                    workingRect,
-                    configuration,
-                    (rows, amounts) =>
-                        {
-                            Span<float> amountsSpan = amounts.Span;
-
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                int offsetY = y - startY;
-
-                                for (int i = 0; i < width; i++)
-                                {
-                                    float distance = Vector2.Distance(center, new Vector2(i + offsetX, offsetY));
-                                    amountsSpan[i] =
-                                        (this.GraphicsOptions.BlendPercentage * (1 - (.95F * (distance / maxDistance))))
-                                        .Clamp(0, 1);
-                                }
-
-                                Span<TPixel> destination = source.GetPixelRowSpan(offsetY).Slice(offsetX, width);
-
-                                this.blender.Blend(
-                                    source.Configuration,
-                                    destination,
-                                    destination,
-                                    rowColors.GetSpan(),
-                                    amountsSpan);
-                            }
-                        });
-            }
+            return new GlowProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor{TPixel}.cs
new file mode 100644
index 0000000000..3201fcbfee
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor{TPixel}.cs
@@ -0,0 +1,112 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Overlays
+{
+    /// <summary>
+    /// An <see cref="IImageProcessor{TPixel}"/> that applies a radial glow effect an <see cref="Image{TPixel}"/>.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class GlowProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly PixelBlender<TPixel> blender;
+
+        private readonly GlowProcessor definition;
+
+        public GlowProcessor(GlowProcessor definition)
+        {
+            this.definition = definition;
+            this.blender = PixelOperations<TPixel>.Instance.GetPixelBlender(definition.GraphicsOptions);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            // TODO: can we simplify the rectangle calculation?
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+            TPixel glowColor = this.definition.GlowColor.ToPixel<TPixel>();
+            Vector2 center = Rectangle.Center(sourceRectangle);
+
+            float finalRadius = this.definition.Radius.Calculate(source.Size());
+
+            float maxDistance = finalRadius > 0
+                                    ? MathF.Min(finalRadius, sourceRectangle.Width * .5F)
+                                    : sourceRectangle.Width * .5F;
+
+            // Align start/end positions.
+            int minX = Math.Max(0, startX);
+            int maxX = Math.Min(source.Width, endX);
+            int minY = Math.Max(0, startY);
+            int maxY = Math.Min(source.Height, endY);
+
+            // Reset offset if necessary.
+            if (minX > 0)
+            {
+                startX = 0;
+            }
+
+            if (minY > 0)
+            {
+                startY = 0;
+            }
+
+            int width = maxX - minX;
+            int offsetX = minX - startX;
+
+            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
+
+            float blendPercentage = this.definition.GraphicsOptions.BlendPercentage;
+
+            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
+            {
+                rowColors.GetSpan().Fill(glowColor);
+
+                ParallelHelper.IterateRowsWithTempBuffer<float>(
+                    workingRect,
+                    configuration,
+                    (rows, amounts) =>
+                        {
+                            Span<float> amountsSpan = amounts.Span;
+
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                int offsetY = y - startY;
+
+                                for (int i = 0; i < width; i++)
+                                {
+                                    float distance = Vector2.Distance(center, new Vector2(i + offsetX, offsetY));
+                                    amountsSpan[i] =
+                                        (blendPercentage * (1 - (.95F * (distance / maxDistance)))).Clamp(0, 1);
+                                }
+
+                                Span<TPixel> destination = source.GetPixelRowSpan(offsetY).Slice(offsetX, width);
+
+                                this.blender.Blend(
+                                    source.Configuration,
+                                    destination,
+                                    destination,
+                                    rowColors.GetSpan(),
+                                    amountsSpan);
+                            }
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs
index a8fa1d65c1..66bf9f1af7 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor.cs
@@ -1,63 +1,48 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using System.Numerics;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Overlays
 {
     /// <summary>
-    /// An <see cref="IImageProcessor{TPixel}"/> that applies a radial vignette effect to an <see cref="Image{TPixel}"/>.
+    /// Defines a radial vignette effect applicable to an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class VignetteProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class VignetteProcessor : IImageProcessor
     {
-        private readonly PixelBlender<TPixel> blender;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="VignetteProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="VignetteProcessor" /> class.
         /// </summary>
         /// <param name="color">The color of the vignette.</param>
-        public VignetteProcessor(TPixel color)
+        public VignetteProcessor(Color color)
             : this(color, GraphicsOptions.Default)
         {
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="VignetteProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="VignetteProcessor" /> class.
         /// </summary>
         /// <param name="color">The color of the vignette.</param>
         /// <param name="options">The options effecting blending and composition.</param>
-        public VignetteProcessor(TPixel color, GraphicsOptions options)
+        public VignetteProcessor(Color color, GraphicsOptions options)
         {
             this.VignetteColor = color;
             this.GraphicsOptions = options;
-            this.blender = PixelOperations<TPixel>.Instance.GetPixelBlender(options);
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="VignetteProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="VignetteProcessor" /> class.
         /// </summary>
         /// <param name="color">The color of the vignette.</param>
         /// <param name="radiusX">The x-radius.</param>
         /// <param name="radiusY">The y-radius.</param>
         /// <param name="options">The options effecting blending and composition.</param>
-        public VignetteProcessor(TPixel color, ValueSize radiusX, ValueSize radiusY, GraphicsOptions options)
+        internal VignetteProcessor(Color color, ValueSize radiusX, ValueSize radiusY, GraphicsOptions options)
         {
             this.VignetteColor = color;
             this.RadiusX = radiusX;
             this.RadiusY = radiusY;
-            this.blender = PixelOperations<TPixel>.Instance.GetPixelBlender(options);
             this.GraphicsOptions = options;
         }
 
@@ -67,94 +52,25 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         public GraphicsOptions GraphicsOptions { get; }
 
         /// <summary>
-        /// Gets or sets the vignette color to apply.
+        /// Gets the vignette color to apply.
         /// </summary>
-        public TPixel VignetteColor { get; set; }
+        public Color VignetteColor { get; }
 
         /// <summary>
-        /// Gets or sets the the x-radius.
+        /// Gets the the x-radius.
         /// </summary>
-        public ValueSize RadiusX { get; set; }
+        internal ValueSize RadiusX { get; }
 
         /// <summary>
-        /// Gets or sets the the y-radius.
+        /// Gets the the y-radius.
         /// </summary>
-        public ValueSize RadiusY { get; set; }
+        internal ValueSize RadiusY { get; }
 
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
         {
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-            TPixel vignetteColor = this.VignetteColor;
-            Vector2 centre = Rectangle.Center(sourceRectangle);
-
-            Size sourceSize = source.Size();
-            float finalRadiusX = this.RadiusX.Calculate(sourceSize);
-            float finalRadiusY = this.RadiusY.Calculate(sourceSize);
-            float rX = finalRadiusX > 0 ? MathF.Min(finalRadiusX, sourceRectangle.Width * .5F) : sourceRectangle.Width * .5F;
-            float rY = finalRadiusY > 0 ? MathF.Min(finalRadiusY, sourceRectangle.Height * .5F) : sourceRectangle.Height * .5F;
-            float maxDistance = MathF.Sqrt((rX * rX) + (rY * rY));
-
-            // Align start/end positions.
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(source.Width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(source.Height, endY);
-
-            // Reset offset if necessary.
-            if (minX > 0)
-            {
-                startX = 0;
-            }
-
-            if (minY > 0)
-            {
-                startY = 0;
-            }
-
-            int width = maxX - minX;
-            int offsetX = minX - startX;
-
-            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
-            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
-            {
-                rowColors.GetSpan().Fill(vignetteColor);
-
-                ParallelHelper.IterateRowsWithTempBuffer<float>(
-                    workingRect,
-                    configuration,
-                    (rows, amounts) =>
-                        {
-                            Span<float> amountsSpan = amounts.Span;
-
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                int offsetY = y - startY;
-
-                                for (int i = 0; i < width; i++)
-                                {
-                                    float distance = Vector2.Distance(centre, new Vector2(i + offsetX, offsetY));
-                                    amountsSpan[i] =
-                                        (this.GraphicsOptions.BlendPercentage * (.9F * (distance / maxDistance))).Clamp(
-                                            0,
-                                            1);
-                                }
-
-                                Span<TPixel> destination = source.GetPixelRowSpan(offsetY).Slice(offsetX, width);
-
-                                this.blender.Blend(
-                                    source.Configuration,
-                                    destination,
-                                    destination,
-                                    rowColors.GetSpan(),
-                                    amountsSpan);
-                            }
-                        });
-            }
+            return new VignetteProcessor<TPixel>(this);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor{TPixel}.cs
new file mode 100644
index 0000000000..78c3cec5e7
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Overlays/VignetteProcessor{TPixel}.cs
@@ -0,0 +1,114 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Overlays
+{
+    /// <summary>
+    /// An <see cref="IImageProcessor{TPixel}"/> that applies a radial vignette effect to an <see cref="Image{TPixel}"/>.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class VignetteProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly PixelBlender<TPixel> blender;
+
+        private readonly VignetteProcessor definition;
+
+        public VignetteProcessor(VignetteProcessor definition)
+        {
+            this.definition = definition;
+            this.blender = PixelOperations<TPixel>.Instance.GetPixelBlender(definition.GraphicsOptions);
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+            TPixel vignetteColor = this.definition.VignetteColor.ToPixel<TPixel>();
+            Vector2 centre = Rectangle.Center(sourceRectangle);
+
+            Size sourceSize = source.Size();
+            float finalRadiusX = this.definition.RadiusX.Calculate(sourceSize);
+            float finalRadiusY = this.definition.RadiusY.Calculate(sourceSize);
+            float rX = finalRadiusX > 0
+                           ? MathF.Min(finalRadiusX, sourceRectangle.Width * .5F)
+                           : sourceRectangle.Width * .5F;
+            float rY = finalRadiusY > 0
+                           ? MathF.Min(finalRadiusY, sourceRectangle.Height * .5F)
+                           : sourceRectangle.Height * .5F;
+            float maxDistance = MathF.Sqrt((rX * rX) + (rY * rY));
+
+            // Align start/end positions.
+            int minX = Math.Max(0, startX);
+            int maxX = Math.Min(source.Width, endX);
+            int minY = Math.Max(0, startY);
+            int maxY = Math.Min(source.Height, endY);
+
+            // Reset offset if necessary.
+            if (minX > 0)
+            {
+                startX = 0;
+            }
+
+            if (minY > 0)
+            {
+                startY = 0;
+            }
+
+            int width = maxX - minX;
+            int offsetX = minX - startX;
+
+            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
+            float blendPercentage = this.definition.GraphicsOptions.BlendPercentage;
+
+            using (IMemoryOwner<TPixel> rowColors = source.MemoryAllocator.Allocate<TPixel>(width))
+            {
+                rowColors.GetSpan().Fill(vignetteColor);
+
+                ParallelHelper.IterateRowsWithTempBuffer<float>(
+                    workingRect,
+                    configuration,
+                    (rows, amounts) =>
+                        {
+                            Span<float> amountsSpan = amounts.Span;
+
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                int offsetY = y - startY;
+
+                                for (int i = 0; i < width; i++)
+                                {
+                                    float distance = Vector2.Distance(centre, new Vector2(i + offsetX, offsetY));
+                                    amountsSpan[i] = (blendPercentage * (.9F * (distance / maxDistance))).Clamp(0, 1);
+                                }
+
+                                Span<TPixel> destination = source.GetPixelRowSpan(offsetY).Slice(offsetX, width);
+
+                                this.blender.Blend(
+                                    source.Configuration,
+                                    destination,
+                                    destination,
+                                    rowColors.GetSpan(),
+                                    amountsSpan);
+                            }
+                        });
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/VignetteExtensions.cs b/src/ImageSharp/Processing/VignetteExtensions.cs
index 63cdee3f83..74a59d3e13 100644
--- a/src/ImageSharp/Processing/VignetteExtensions.cs
+++ b/src/ImageSharp/Processing/VignetteExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing.Processors.Overlays;
 using SixLabors.Primitives;
@@ -9,7 +8,7 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines extensions that allow the application of a radial glow to an <see cref="Image{TPixel}"/>
+    /// Defines extensions that allow the application of a radial glow to an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class VignetteExtensions
@@ -17,53 +16,47 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => Vignette(source, GraphicsOptions.Default);
+        public static IImageProcessingContext Vignette(this IImageProcessingContext source) =>
+            Vignette(source, GraphicsOptions.Default);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the vignette.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => Vignette(source, GraphicsOptions.Default, color);
+        public static IImageProcessingContext Vignette(this IImageProcessingContext source, Color color) =>
+            Vignette(source, GraphicsOptions.Default, color);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="radiusX">The the x-radius.</param>
         /// <param name="radiusY">The the y-radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, float radiusX, float radiusY)
-            where TPixel : struct, IPixel<TPixel>
-            => Vignette(source, GraphicsOptions.Default, radiusX, radiusY);
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            float radiusX,
+            float radiusY) =>
+            Vignette(source, GraphicsOptions.Default, radiusX, radiusY);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => Vignette(source, GraphicsOptions.Default, rectangle);
+        public static IImageProcessingContext Vignette(this IImageProcessingContext source, Rectangle rectangle) =>
+            Vignette(source, GraphicsOptions.Default, rectangle);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color to set as the vignette.</param>
         /// <param name="radiusX">The the x-radius.</param>
@@ -72,64 +65,82 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float radiusX, float radiusY, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Vignette(GraphicsOptions.Default, color, radiusX, radiusY, rectangle);
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            Color color,
+            float radiusX,
+            float radiusY,
+            Rectangle rectangle) =>
+            source.Vignette(GraphicsOptions.Default, color, radiusX, radiusY, rectangle);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options)
-            where TPixel : struct, IPixel<TPixel>
-            => source.VignetteInternal(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f));
+        public static IImageProcessingContext Vignette(this IImageProcessingContext source, GraphicsOptions options) =>
+            source.VignetteInternal(
+                options,
+                Color.Black,
+                ValueSize.PercentageOfWidth(.5f),
+                ValueSize.PercentageOfHeight(.5f));
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="color">The color to set as the vignette.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => source.VignetteInternal(options, color, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f));
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color) =>
+            source.VignetteInternal(
+                options,
+                color,
+                ValueSize.PercentageOfWidth(.5f),
+                ValueSize.PercentageOfHeight(.5f));
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="radiusX">The the x-radius.</param>
         /// <param name="radiusY">The the y-radius.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, float radiusX, float radiusY)
-            where TPixel : struct, IPixel<TPixel>
-            => source.VignetteInternal(options, NamedColors<TPixel>.Black, radiusX, radiusY);
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            float radiusX,
+            float radiusY) =>
+            source.VignetteInternal(options, Color.Black, radiusX, radiusY);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.VignetteInternal(options, NamedColors<TPixel>.Black, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f), rectangle);
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Rectangle rectangle) =>
+            source.VignetteInternal(
+                options,
+                Color.Black,
+                ValueSize.PercentageOfWidth(.5f),
+                ValueSize.PercentageOfHeight(.5f),
+                rectangle);
 
         /// <summary>
         /// Applies a radial vignette effect to an image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options effecting pixel blending.</param>
         /// <param name="color">The color to set as the vignette.</param>
@@ -139,16 +150,30 @@ namespace SixLabors.ImageSharp.Processing
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Vignette<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float radiusX, float radiusY, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.VignetteInternal(options, color, radiusX, radiusY, rectangle);
+        public static IImageProcessingContext Vignette(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float radiusX,
+            float radiusY,
+            Rectangle rectangle) =>
+            source.VignetteInternal(options, color, radiusX, radiusY, rectangle);
 
-        private static IImageProcessingContext<TPixel> VignetteInternal<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radiusX, ValueSize radiusY, Rectangle rectangle)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new VignetteProcessor<TPixel>(color, radiusX, radiusY, options), rectangle);
+        private static IImageProcessingContext VignetteInternal(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            ValueSize radiusX,
+            ValueSize radiusY,
+            Rectangle rectangle) =>
+            source.ApplyProcessor(new VignetteProcessor(color, radiusX, radiusY, options), rectangle);
 
-        private static IImageProcessingContext<TPixel> VignetteInternal<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, ValueSize radiusX, ValueSize radiusY)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new VignetteProcessor<TPixel>(color, radiusX, radiusY, options));
+        private static IImageProcessingContext VignetteInternal(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            ValueSize radiusX,
+            ValueSize radiusY) =>
+            source.ApplyProcessor(new VignetteProcessor(color, radiusX, radiusY, options));
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
index 15b82e022d..29f69cdd55 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
@@ -20,14 +20,14 @@ namespace SixLabors.ImageSharp.Benchmarks
 
     public class Glow : BenchmarkBase
     {
-        private GlowProcessor<Rgba32> bulk;
+        private GlowProcessor bulk;
 
         private GlowProcessorParallel<Rgba32> parallel;
 
         [GlobalSetup]
         public void Setup()
         {
-            this.bulk = new GlowProcessor<Rgba32>(NamedColors<Rgba32>.Beige, 800 * .5f, GraphicsOptions.Default);
+            this.bulk = new GlowProcessor(Color.Beige, 800 * .5f, GraphicsOptions.Default);
             this.parallel = new GlowProcessorParallel<Rgba32>(NamedColors<Rgba32>.Beige) { Radius = 800 * .5f, };
         }
 
diff --git a/tests/ImageSharp.Tests/Drawing/BeziersTests.cs b/tests/ImageSharp.Tests/Drawing/BeziersTests.cs
index 69b2098dc9..cc8f27f3a2 100644
--- a/tests/ImageSharp.Tests/Drawing/BeziersTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/BeziersTests.cs
@@ -19,8 +19,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "BezierLine");
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Color.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).DrawBeziers(
+                    x => x.DrawBeziers(
                         Rgba32.HotPink,
                         5,
                         new SixLabors.Primitives.PointF[]
@@ -56,8 +57,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Color.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).DrawBeziers(
+                    x => x.DrawBeziers(
                         color,
                         10,
                         new SixLabors.Primitives.PointF[]
diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
index ee04d43888..54b04390ec 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
@@ -80,7 +80,7 @@ namespace SixLabors.ImageSharp.Tests
 
                 // Apply a background color so we can see the translation.
                 blend.Mutate(x => x.Transform(builder));
-                blend.Mutate(x => x.BackgroundColor(NamedColors<TPixel>.HotPink));
+                blend.Mutate(x => x.BackgroundColor(Color.HotPink));
 
                 // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
                 var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
diff --git a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
index 0d791fbd23..d2485f334a 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
@@ -30,8 +30,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                     new Vector2(10, 400));
 
                 var p = new Path(linerSegemnt, bazierSegment);
-
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(Rgba32.HotPink, 5, p));
+                
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, p));
                 image.Save($"{path}/Simple.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -67,7 +68,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(color, 10, p));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(color, 10, p));
                 image.Save($"{path}/Opacity.png");
 
                 //shift background color towards forground color by the opacity amount
diff --git a/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs
index d827975c72..06961bec4b 100644
--- a/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs
@@ -31,7 +31,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
                 image.Save($"{path}/Simple.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -73,7 +74,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
                 image.Save($"{path}/SimpleVanishHole.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -113,7 +115,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
                 image.Save($"{path}/SimpleOverlapping.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -147,9 +150,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .Draw(Pens.Dash(Rgba32.HotPink, 5), simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(Pens.Dash(Rgba32.HotPink, 5), simplePath.Clip(hole1)));
                 image.Save($"{path}/Dashed.png");
             }
         }
@@ -171,7 +173,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Draw(color, 5, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Draw(color, 5, simplePath.Clip(hole1)));
                 image.Save($"{path}/Opacity.png");
 
                 //shift background color towards forground color by the opacity amount
diff --git a/tests/ImageSharp.Tests/Drawing/LineTests.cs b/tests/ImageSharp.Tests/Drawing/LineTests.cs
index 43dec547eb..1cc0fd1a40 100644
--- a/tests/ImageSharp.Tests/Drawing/LineTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/LineTests.cs
@@ -19,8 +19,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).DrawLines(
+                    x => x.DrawLines(
                         Rgba32.HotPink,
                         5,
                         new Vector2(10, 10),
@@ -43,8 +44,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).DrawLines(
+                    x => x.DrawLines(
                         new GraphicsOptions(false),
                         Rgba32.HotPink,
                         5,
@@ -68,9 +70,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .DrawLines(Pens.Dash(Rgba32.HotPink, 5),
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.DrawLines(Pens.Dash(Rgba32.HotPink, 5),
                     new SixLabors.Primitives.PointF[] {
                             new Vector2(10, 10),
                             new Vector2(200, 150),
@@ -86,9 +87,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .DrawLines(Pens.Dot(Rgba32.HotPink, 5),
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.DrawLines(Pens.Dot(Rgba32.HotPink, 5),
                     new SixLabors.Primitives.PointF[] {
                             new Vector2(10, 10),
                             new Vector2(200, 150),
@@ -104,9 +104,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .DrawLines(Pens.DashDot(Rgba32.HotPink, 5),
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.DrawLines(Pens.DashDot(Rgba32.HotPink, 5),
                     new SixLabors.Primitives.PointF[] {
                             new Vector2(10, 10),
                             new Vector2(200, 150),
@@ -122,9 +121,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
             var image = new Image<Rgba32>(500, 500);
 
-            image.Mutate(x => x
-                .BackgroundColor(Rgba32.Blue)
-                .DrawLines(Pens.DashDotDot(Rgba32.HotPink, 5), new SixLabors.Primitives.PointF[] {
+            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+            image.Mutate(x => x.DrawLines(Pens.DashDotDot(Rgba32.HotPink, 5), 
+                new SixLabors.Primitives.PointF[] {
                             new Vector2(10, 10),
                             new Vector2(200, 150),
                             new Vector2(50, 300)
@@ -141,8 +140,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             var image = new Image<Rgba32>(500, 500);
 
+            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
             image.Mutate(
-                x => x.BackgroundColor(Rgba32.Blue).DrawLines(
+                x => x.DrawLines(
                     color,
                     10,
                     new Vector2(10, 10),
@@ -169,8 +169,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             var image = new Image<Rgba32>(500, 500);
 
+            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
             image.Mutate(
-                x => x.BackgroundColor(Rgba32.Blue).DrawLines(
+                x => x.DrawLines(
                     Rgba32.HotPink,
                     10,
                     new Vector2(10, 10),
diff --git a/tests/ImageSharp.Tests/Drawing/PolygonTests.cs b/tests/ImageSharp.Tests/Drawing/PolygonTests.cs
index 6ea9c647f2..febb39c20d 100644
--- a/tests/ImageSharp.Tests/Drawing/PolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/PolygonTests.cs
@@ -20,8 +20,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).DrawPolygon(
+                    x => x.DrawPolygon(
                         Rgba32.HotPink,
                         5,
                         new Vector2(10, 10),
@@ -54,7 +55,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).DrawPolygon(color, 10, simplePath));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.DrawPolygon(color, 10, simplePath));
                 image.Save($"{path}/Opacity.png");
 
                 //shift background color towards forground color by the opacity amount
@@ -79,8 +81,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).Draw(Rgba32.HotPink, 10, new Rectangle(10, 10, 190, 140)));
+                    x => x.Draw(Rgba32.HotPink, 10, new Rectangle(10, 10, 190, 140)));
                 image.Save($"{path}/Rectangle.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
diff --git a/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs b/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
index 23acc1a44f..e8f53de010 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
@@ -24,15 +24,13 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                         new Vector2(300, 400)
             };
 
-            TPixel blue = NamedColors<TPixel>.Blue;
-            TPixel hotPink = NamedColors<TPixel>.HotPink;
+            Color blue = Color.Blue;
+            Color hotPink = Color.HotPink;
 
             using (Image<TPixel> image = provider.GetImage())
             {
-
-                image.Mutate(x => x
-                    .BackgroundColor(blue)
-                    .Fill(hotPink, new Polygon(new CubicBezierLineSegment(simplePath))));
+                image.Mutate(x => x.BackgroundColor(blue));
+                image.Mutate(x => x.Fill(hotPink.ToPixel<TPixel>(), new Polygon(new CubicBezierLineSegment(simplePath))));
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(provider);
             }
@@ -55,9 +53,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = provider.GetImage() as Image<Rgba32>)
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .Fill(color, new Polygon(new CubicBezierLineSegment(simplePath))));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                
+                image.Mutate(x => x.Fill(color, new Polygon(new CubicBezierLineSegment(simplePath))));
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(provider);
             }
diff --git a/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs
index 2c9628e842..0e997ad7eb 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs
@@ -31,7 +31,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             // var clipped = new Rectangle(10, 10, 100, 100).Clip(new Rectangle(20, 0, 20, 20));
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Fill(Rgba32.HotPink, clipped));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Fill(Rgba32.HotPink, clipped));
                 image.Save($"{path}/Simple.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -59,7 +60,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Fill(Rgba32.HotPink, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Fill(Rgba32.HotPink, simplePath.Clip(hole1)));
                 image.Save($"{path}/SimpleOverlapping.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -88,7 +90,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).Fill(color, simplePath.Clip(hole1)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Fill(color, simplePath.Clip(hole1)));
                 image.Save($"{path}/Opacity.png");
 
                 //shift background color towards forground color by the opacity amount
diff --git a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
index 5660518eb4..6a299aad7b 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
@@ -68,8 +68,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).FillPolygon(
+                    x => x.FillPolygon(
                         new GraphicsOptions(false),
                         Rgba32.HotPink,
                         simplePath));
@@ -101,9 +102,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             {
                 var brush = new ImageBrush<Rgba32>(brushImage);
 
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .FillPolygon(brush, simplePath));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.FillPolygon(brush, simplePath));
                 image.Save($"{path}/Image.png");
             }
         }
@@ -121,7 +121,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue).FillPolygon(color, simplePath));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.FillPolygon(color, simplePath));
                 image.Save($"{path}/Opacity.png");
 
                 //shift background color towards forground color by the opacity amount
@@ -140,8 +141,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(500, 500))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).Fill(
+                    x => x.Fill(
                         Rgba32.HotPink,
                         new SixLabors.Shapes.RectangularPolygon(10, 10, 190, 140)));
                 image.Save($"{path}/Rectangle.png");
@@ -166,8 +168,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var image = new Image<Rgba32>(100, 100))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(
-                    x => x.BackgroundColor(Rgba32.Blue).Fill(Rgba32.HotPink, new RegularPolygon(50, 50, 3, 30)));
+                    x => x.Fill(Rgba32.HotPink, new RegularPolygon(50, 50, 3, 30)));
                 image.Save($"{path}/Triangle.png");
 
                 Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
@@ -186,9 +189,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             config.MaxDegreeOfParallelism = 1;
             using (var image = new Image<Rgba32>(config, 100, 100))
             {
-                image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
-                    .Fill(Rgba32.HotPink, new RegularPolygon(50, 50, 7, 30, -(float)Math.PI)));
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
+                image.Mutate(x => x.Fill(Rgba32.HotPink, 
+                    new RegularPolygon(50, 50, 7, 30, -(float)Math.PI)));
                 image.Save($"{path}/Septagon.png");
             }
         }
@@ -202,8 +205,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             config.MaxDegreeOfParallelism = 1;
             using (var image = new Image<Rgba32>(config, 100, 100))
             {
+                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
                 image.Mutate(x => x
-                    .BackgroundColor(Rgba32.Blue)
                     .Fill(Rgba32.HotPink, new EllipsePolygon(50, 50, 30, 50)
                     .Rotate((float)(Math.PI / 3))));
                 image.Save($"{path}/ellipse.png");
diff --git a/tests/ImageSharp.Tests/Processing/Effects/BackgroundColorTest.cs b/tests/ImageSharp.Tests/Processing/Effects/BackgroundColorTest.cs
index 7775de2d24..14758958f0 100644
--- a/tests/ImageSharp.Tests/Processing/Effects/BackgroundColorTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Effects/BackgroundColorTest.cs
@@ -14,41 +14,41 @@ namespace SixLabors.ImageSharp.Tests.Processing.Effects
         [Fact]
         public void BackgroundColor_amount_BackgroundColorProcessorDefaultsSet()
         {
-            this.operations.BackgroundColor(Rgba32.BlanchedAlmond);
-            var processor = this.Verify<BackgroundColorProcessor<Rgba32>>();
+            this.operations.BackgroundColor(Color.BlanchedAlmond);
+            var processor = this.Verify<BackgroundColorProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.GraphicsOptions);
-            Assert.Equal(Rgba32.BlanchedAlmond, processor.Color);
+            Assert.Equal(Color.BlanchedAlmond, processor.Color);
         }
 
         [Fact]
         public void BackgroundColor_amount_rect_BackgroundColorProcessorDefaultsSet()
         {
-            this.operations.BackgroundColor(Rgba32.BlanchedAlmond, this.rect);
-            var processor = this.Verify<BackgroundColorProcessor<Rgba32>>(this.rect);
+            this.operations.BackgroundColor(Color.BlanchedAlmond, this.rect);
+            var processor = this.Verify<BackgroundColorProcessor>(this.rect);
 
             Assert.Equal(GraphicsOptions.Default, processor.GraphicsOptions);
-            Assert.Equal(Rgba32.BlanchedAlmond, processor.Color);
+            Assert.Equal(Color.BlanchedAlmond, processor.Color);
         }
 
         [Fact]
         public void BackgroundColor_amount_options_BackgroundColorProcessorDefaultsSet()
         {
-            this.operations.BackgroundColor(this.options, Rgba32.BlanchedAlmond);
-            var processor = this.Verify<BackgroundColorProcessor<Rgba32>>();
+            this.operations.BackgroundColor(this.options, Color.BlanchedAlmond);
+            var processor = this.Verify<BackgroundColorProcessor>();
 
             Assert.Equal(this.options, processor.GraphicsOptions);
-            Assert.Equal(Rgba32.BlanchedAlmond, processor.Color);
+            Assert.Equal(Color.BlanchedAlmond, processor.Color);
         }
 
         [Fact]
         public void BackgroundColor_amount_rect_options_BackgroundColorProcessorDefaultsSet()
         {
-            this.operations.BackgroundColor(this.options, Rgba32.BlanchedAlmond, this.rect);
-            var processor = this.Verify<BackgroundColorProcessor<Rgba32>>(this.rect);
+            this.operations.BackgroundColor(this.options, Color.BlanchedAlmond, this.rect);
+            var processor = this.Verify<BackgroundColorProcessor>(this.rect);
 
             Assert.Equal(this.options, processor.GraphicsOptions);
-            Assert.Equal(Rgba32.BlanchedAlmond, processor.Color);
+            Assert.Equal(Color.BlanchedAlmond, processor.Color);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs b/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs
index 899082e361..0301f5c039 100644
--- a/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs
@@ -18,10 +18,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         public void Glow_GlowProcessorWithDefaultValues()
         {
             this.operations.Glow();
-            var p = this.Verify<GlowProcessor<Rgba32>>();
+            var p = this.Verify<GlowProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.GlowColor);
+            Assert.Equal(Color.Black, p.GlowColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.Radius);
         }
 
@@ -29,10 +29,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         public void Glow_Color_GlowProcessorWithDefaultValues()
         {
             this.operations.Glow(Rgba32.Aquamarine);
-            var p = this.Verify<GlowProcessor<Rgba32>>();
+            var p = this.Verify<GlowProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Aquamarine, p.GlowColor);
+            Assert.Equal(Color.Aquamarine, p.GlowColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.Radius);
         }
 
@@ -40,10 +40,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         public void Glow_Radux_GlowProcessorWithDefaultValues()
         {
             this.operations.Glow(3.5f);
-            var p = this.Verify<GlowProcessor<Rgba32>>();
+            var p = this.Verify<GlowProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.GlowColor);
+            Assert.Equal(Color.Black, p.GlowColor);
             Assert.Equal(ValueSize.Absolute(3.5f), p.Radius);
         }
 
@@ -52,10 +52,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         {
             var rect = new Rectangle(12, 123, 43, 65);
             this.operations.Glow(rect);
-            var p = this.Verify<GlowProcessor<Rgba32>>(rect);
+            var p = this.Verify<GlowProcessor>(rect);
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.GlowColor);
+            Assert.Equal(Color.Black, p.GlowColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.Radius);
         }
     }
diff --git a/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs b/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs
index f47bffe26f..2538aa137c 100644
--- a/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs
@@ -16,10 +16,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         public void Vignette_VignetteProcessorWithDefaultValues()
         {
             this.operations.Vignette();
-            var p = this.Verify<VignetteProcessor<Rgba32>>();
+            var p = this.Verify<VignetteProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.VignetteColor);
+            Assert.Equal(Color.Black, p.VignetteColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.RadiusX);
             Assert.Equal(ValueSize.PercentageOfHeight(.5f), p.RadiusY);
         }
@@ -27,11 +27,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         [Fact]
         public void Vignette_Color_VignetteProcessorWithDefaultValues()
         {
-            this.operations.Vignette(Rgba32.Aquamarine);
-            var p = this.Verify<VignetteProcessor<Rgba32>>();
+            this.operations.Vignette(Color.Aquamarine);
+            var p = this.Verify<VignetteProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Aquamarine, p.VignetteColor);
+            Assert.Equal(Color.Aquamarine, p.VignetteColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.RadiusX);
             Assert.Equal(ValueSize.PercentageOfHeight(.5f), p.RadiusY);
         }
@@ -40,10 +40,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         public void Vignette_Radux_VignetteProcessorWithDefaultValues()
         {
             this.operations.Vignette(3.5f, 12123f);
-            var p = this.Verify<VignetteProcessor<Rgba32>>();
+            var p = this.Verify<VignetteProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.VignetteColor);
+            Assert.Equal(Color.Black, p.VignetteColor);
             Assert.Equal(ValueSize.Absolute(3.5f), p.RadiusX);
             Assert.Equal(ValueSize.Absolute(12123f), p.RadiusY);
         }
@@ -53,10 +53,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Overlays
         {
             var rect = new Rectangle(12, 123, 43, 65);
             this.operations.Vignette(rect);
-            var p = this.Verify<VignetteProcessor<Rgba32>>(rect);
+            var p = this.Verify<VignetteProcessor>(rect);
 
             Assert.Equal(GraphicsOptions.Default, p.GraphicsOptions);
-            Assert.Equal(Rgba32.Black, p.VignetteColor);
+            Assert.Equal(Color.Black, p.VignetteColor);
             Assert.Equal(ValueSize.PercentageOfWidth(.5f), p.RadiusX);
             Assert.Equal(ValueSize.PercentageOfHeight(.5f), p.RadiusY);
         }
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
index d7f77c9565..dc6ff6f3eb 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Effects/BackgroundColorTest.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         public void FullImage<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            provider.RunValidatingProcessorTest(x =>  x.BackgroundColor(NamedColors<TPixel>.HotPink));
+            provider.RunValidatingProcessorTest(x =>  x.BackgroundColor(Color.HotPink));
         }
 
         [Theory]
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
             where TPixel : struct, IPixel<TPixel>
         {
             provider.RunRectangleConstrainedValidatingProcessorTest(
-                (x, rect) => x.BackgroundColor(NamedColors<TPixel>.HotPink, rect));
+                (x, rect) => x.BackgroundColor(Color.HotPink, rect));
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
index 113c13b8ae..27aeb4b053 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/GlowTest.cs
@@ -13,11 +13,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
     [GroupOutput("Overlays")]
     public class GlowTest : OverlayTestBase
     {
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, T color) => ctx.Glow(color);
+        protected override void Apply(IImageProcessingContext ctx, Color color) => ctx.Glow(color);
 
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY) =>
+        protected override void Apply(IImageProcessingContext ctx, float radiusX, float radiusY) =>
             ctx.Glow(radiusX);
 
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect) => ctx.Glow(rect);
+        protected override void Apply(IImageProcessingContext ctx, Rectangle rect) => ctx.Glow(rect);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
index d2abcd7312..788f7e1ade 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
@@ -27,8 +27,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
             where TPixel : struct, IPixel<TPixel>
         {
             provider.Utility.TestGroupName = this.GetType().Name;
-            var f = (FieldInfo)typeof(NamedColors<TPixel>).GetMember(colorName)[0];
-            TPixel color = (TPixel)f.GetValue(null);
+            var f = (FieldInfo)typeof(Color).GetMember(colorName)[0];
+            Color color = (Color)f.GetValue(null);
 
             provider.RunValidatingProcessorTest(x => this.Apply(x, color), colorName, ValidatorComparer, appendPixelTypeToFileName: false);
         }
@@ -58,13 +58,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
             provider.RunRectangleConstrainedValidatingProcessorTest((x, rect) => this.Apply(x, rect));
         }
 
-        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, T color)
-            where T : struct, IPixel<T>;
+        protected abstract void Apply(IImageProcessingContext ctx, Color color);
         
-        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY)
-            where T : struct, IPixel<T>;
+        protected abstract void Apply(IImageProcessingContext ctx, float radiusX, float radiusY);
         
-        protected abstract void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect)
-            where T : struct, IPixel<T>;
+        protected abstract void Apply(IImageProcessingContext ctx, Rectangle rect);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
index ad04a827db..9448feefe2 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/VignetteTest.cs
@@ -9,11 +9,11 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
     [GroupOutput("Overlays")]
     public class VignetteTest : OverlayTestBase
     {
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, T color) => ctx.Vignette(color);
+        protected override void Apply(IImageProcessingContext ctx, Color color) => ctx.Vignette(color);
 
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, float radiusX, float radiusY) =>
+        protected override void Apply(IImageProcessingContext ctx, float radiusX, float radiusY) =>
             ctx.Vignette(radiusX, radiusY);
 
-        protected override void Apply<T>(IImageProcessingContext<T> ctx, Rectangle rect) => ctx.Vignette(rect);
+        protected override void Apply(IImageProcessingContext ctx, Rectangle rect) => ctx.Vignette(rect);
     }
 }
\ No newline at end of file

From 139a0000ce5efedc2a3d2a1080f49cc64976f754 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 9 May 2019 23:49:58 +0200
Subject: [PATCH 154/223] made AutoOrientExtensions non-generic

---
 src/ImageSharp/Processing/AutoOrientExtensions.cs      | 10 ++++------
 .../Processing/Transforms/AutoOrientTests.cs           |  2 +-
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/src/ImageSharp/Processing/AutoOrientExtensions.cs b/src/ImageSharp/Processing/AutoOrientExtensions.cs
index d065d4583d..a831e2d9af 100644
--- a/src/ImageSharp/Processing/AutoOrientExtensions.cs
+++ b/src/ImageSharp/Processing/AutoOrientExtensions.cs
@@ -7,7 +7,7 @@ using SixLabors.ImageSharp.Processing.Processors.Transforms;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Defines extensions that allow the application of auto-orientation operations to an <see cref="Image{TPixel}"/>
+    /// Defines extensions that allow the application of auto-orientation operations to an <see cref="Image"/>
     /// using Mutate/Clone.
     /// </summary>
     public static class AutoOrientExtensions
@@ -15,11 +15,9 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Adjusts an image so that its orientation is suitable for viewing. Adjustments are based on EXIF metadata embedded in the image.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to auto rotate.</param>
-        /// <returns>The <see cref="Image{TPixel}"/></returns>
-        public static IImageProcessingContext<TPixel> AutoOrient<TPixel>(this IImageProcessingContext<TPixel> source)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new AutoOrientProcessor<TPixel>());
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext AutoOrient(this IImageProcessingContext source)
+            => source.ApplyProcessor(new AutoOrientProcessor());
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Transforms/AutoOrientTests.cs b/tests/ImageSharp.Tests/Processing/Transforms/AutoOrientTests.cs
index bba4661db0..0547b46e3b 100644
--- a/tests/ImageSharp.Tests/Processing/Transforms/AutoOrientTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Transforms/AutoOrientTests.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void AutoOrient_AutoOrientProcessor()
         {
             this.operations.AutoOrient();
-            this.Verify<AutoOrientProcessor<Rgba32>>();
+            this.Verify<AutoOrientProcessor>();
         }
     }
 }
\ No newline at end of file

From ea8f7b748fb04febb3d8d3791b5a93d1799e375a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 10 May 2019 00:24:28 +0200
Subject: [PATCH 155/223] cleanup and document Color

---
 src/ImageSharp/Color/Color.Conversions.cs    | 162 +++++++++++++++++++
 src/ImageSharp/Color/Color.NamedColors.cs    |   7 +-
 src/ImageSharp/Color/Color.WebSafePalette.cs |   9 +-
 src/ImageSharp/Color/Color.WernerPalette.cs  |   7 +-
 src/ImageSharp/Color/Color.cs                | 107 ++++++------
 5 files changed, 226 insertions(+), 66 deletions(-)
 create mode 100644 src/ImageSharp/Color/Color.Conversions.cs

diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
new file mode 100644
index 0000000000..001aee5a4f
--- /dev/null
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -0,0 +1,162 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Numerics;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    /// <content>
+    /// Contains constructors and implicit conversion methods.
+    /// </content>
+    public readonly partial struct Color
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Rgba64"/> containing the color information.</param>
+        public Color(Rgba64 pixel)
+        {
+            this.data = pixel;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Rgba32"/> containing the color information.</param>
+        public Color(Rgba32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Argb32"/> containing the color information.</param>
+        public Color(Argb32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Bgra32"/> containing the color information.</param>
+        public Color(Bgra32 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Rgb24"/> containing the color information.</param>
+        public Color(Rgb24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="pixel">The <see cref="Bgr24"/> containing the color information.</param>
+        public Color(Bgr24 pixel)
+        {
+            this.data = new Rgba64(pixel);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Color"/> struct.
+        /// </summary>
+        /// <param name="vector">The <see cref="Vector4"/> containing the color information.</param>
+        public Color(Vector4 vector)
+        {
+            this.data = new Rgba64(vector);
+        }
+
+        /// <summary>
+        /// Converts an <see cref="Rgba64"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgba64"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Rgba64 source) => new Color(source);
+
+        /// <summary>
+        /// Converts an <see cref="Rgba32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgba32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Rgba32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts an <see cref="Bgra32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Bgra32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Bgra32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts an <see cref="Argb32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Argb32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Argb32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts an <see cref="Rgb24"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgb24"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Rgb24 source) => new Color(source);
+
+        /// <summary>
+        /// Converts an <see cref="Bgr24"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Bgr24"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static implicit operator Color(Bgr24 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgba64"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgba64"/>.</returns>
+        public static implicit operator Rgba64(Color color) => color.data;
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgba32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgba32"/>.</returns>
+        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Bgra32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Bgra32"/>.</returns>
+        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Argb32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Argb32"/>.</returns>
+        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgb24"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgb24"/>.</returns>
+        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Bgr24"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Bgr24"/>.</returns>
+        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.NamedColors.cs b/src/ImageSharp/Color/Color.NamedColors.cs
index a712f85dab..8811516c1c 100644
--- a/src/ImageSharp/Color/Color.NamedColors.cs
+++ b/src/ImageSharp/Color/Color.NamedColors.cs
@@ -1,8 +1,11 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 namespace SixLabors.ImageSharp
 {
+    /// <content>
+    /// Contains static named color values.
+    /// </content>
     public readonly partial struct Color
     {
         /// <summary>
diff --git a/src/ImageSharp/Color/Color.WebSafePalette.cs b/src/ImageSharp/Color/Color.WebSafePalette.cs
index 13720ec493..506432ac2d 100644
--- a/src/ImageSharp/Color/Color.WebSafePalette.cs
+++ b/src/ImageSharp/Color/Color.WebSafePalette.cs
@@ -1,16 +1,19 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using System;
 
 namespace SixLabors.ImageSharp
 {
+    /// <content>
+    /// Contains the definition of <see cref="WebSafePalette"/>.
+    /// </content>
     public partial struct Color
     {
         private static readonly Lazy<Color[]> WebSafePaletteLazy = new Lazy<Color[]>(CreateWebSafePalette, true);
 
         /// <summary>
-        /// Gets a collection of named, web safe, colors as defined in the CSS Color Module Level 4.
+        /// Gets a collection of named, web safe colors as defined in the CSS Color Module Level 4.
         /// </summary>
         public static ReadOnlySpan<Color> WebSafePalette => WebSafePaletteLazy.Value;
 
diff --git a/src/ImageSharp/Color/Color.WernerPalette.cs b/src/ImageSharp/Color/Color.WernerPalette.cs
index 45823479e1..37980b15fd 100644
--- a/src/ImageSharp/Color/Color.WernerPalette.cs
+++ b/src/ImageSharp/Color/Color.WernerPalette.cs
@@ -1,10 +1,13 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using System;
 
 namespace SixLabors.ImageSharp
 {
+    /// <content>
+    /// Contains the definition of <see cref="WernerPalette"/>.
+    /// </content>
     public partial struct Color
     {
         private static readonly Lazy<Color[]> WernerPaletteLazy = new Lazy<Color[]>(CreateWernerPalette, true);
diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index 021cea4159..94b5dde2ee 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -11,81 +11,58 @@ using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
+    /// <summary>
+    /// Represents a color value that is convertible to all <see cref="IPixel{TSelf}"/> implementations.
+    /// </summary>
     public readonly partial struct Color : IEquatable<Color>
     {
         private readonly Rgba64 data;
 
-        public Color(Rgba64 pixel)
-        {
-            this.data = pixel;
-        }
-
-        public Color(Rgba32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Argb32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Bgra32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Rgb24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Bgr24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
-
-        public Color(Vector4 vector)
-        {
-            this.data = new Rgba64(vector);
-        }
-
-        public static implicit operator Color(Rgba64 source) => new Color(source);
-
-        public static implicit operator Color(Rgba32 source) => new Color(source);
-
-        public static implicit operator Color(Bgra32 source) => new Color(source);
-
-        public static implicit operator Color(Argb32 source) => new Color(source);
-
-        public static implicit operator Color(Rgb24 source) => new Color(source);
-
-        public static implicit operator Color(Bgr24 source) => new Color(source);
-
-        public static implicit operator Rgba64(Color color) => color.data;
-
-        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
-
-        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
-
-        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
-
-        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
-
-        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
-
+        /// <summary>
+        /// Checks whether two <see cref="Color"/> structures are equal.
+        /// </summary>
+        /// <param name="left">The left hand <see cref="Color"/> operand.</param>
+        /// <param name="right">The right hand <see cref="Color"/> operand.</param>
+        /// <returns>
+        /// True if the <paramref name="left"/> parameter is equal to the <paramref name="right"/> parameter;
+        /// otherwise, false.
+        /// </returns>
         public static bool operator ==(Color left, Color right)
         {
             return left.Equals(right);
         }
 
+        /// <summary>
+        /// Checks whether two <see cref="Color"/> structures are equal.
+        /// </summary>
+        /// <param name="left">The left hand <see cref="Color"/> operand.</param>
+        /// <param name="right">The right hand <see cref="Color"/> operand.</param>
+        /// <returns>
+        /// True if the <paramref name="left"/> parameter is not equal to the <paramref name="right"/> parameter;
+        /// otherwise, false.
+        /// </returns>
         public static bool operator !=(Color left, Color right)
         {
             return !left.Equals(right);
         }
 
+        /// <summary>
+        /// Creates a <see cref="Color"/> from RGBA bytes.
+        /// </summary>
+        /// <param name="r">The red component (0-255).</param>
+        /// <param name="g">The green component (0-255).</param>
+        /// <param name="b">The blue component (0-255).</param>
+        /// <param name="a">The alpha component (0-255).</param>
+        /// <returns>The <see cref="Color"/>.</returns>
         public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
 
+        /// <summary>
+        /// Creates a <see cref="Color"/> from RGB bytes.
+        /// </summary>
+        /// <param name="r">The red component (0-255).</param>
+        /// <param name="g">The green component (0-255).</param>
+        /// <param name="b">The blue component (0-255).</param>
+        /// <returns>The <see cref="Color"/>.</returns>
         public static Color FromRgb(byte r, byte g, byte b) => FromRgba(r, g, b, 255);
 
         /// <summary>
@@ -120,6 +97,12 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc />
         public override string ToString() => this.ToHex();
 
+        /// <summary>
+        /// Converts the color instance to an <see cref="IPixel{TSelf}"/>
+        /// implementation defined by <typeparamref name="TPixel"/>.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel type to convert to.</typeparam>
+        /// <returns>The pixel value.</returns>
         public TPixel ToPixel<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
@@ -128,17 +111,20 @@ namespace SixLabors.ImageSharp
             return pixel;
         }
 
+        /// <inheritdoc />
         public bool Equals(Color other)
         {
             return this.data.PackedValue == other.data.PackedValue;
         }
 
+        /// <inheritdoc />
         public override bool Equals(object obj)
         {
             if (ReferenceEquals(null, obj))
             {
                 return false;
             }
+
             return obj is Color other && this.Equals(other);
         }
 
@@ -148,6 +134,9 @@ namespace SixLabors.ImageSharp
             return this.data.PackedValue.GetHashCode();
         }
 
+        /// <summary>
+        /// Bulk convert a span of <see cref="Color"/> to a span of a specified pixel type.
+        /// </summary>
         internal static void ToPixel<TPixel>(
             Configuration configuration,
             ReadOnlySpan<Color> source,

From 2cd94fa1f817ad5a88828b7d75b4c0b5d86806a4 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 10 May 2019 00:26:34 +0200
Subject: [PATCH 156/223] cleanup

---
 .../Processors/Binarization/BinaryOrderedDitherProcessor.cs   | 3 +++
 .../Processors/Binarization/BinaryThresholdProcessor.cs       | 4 ++--
 .../Processors/Overlays/BackgroundColorProcessor.cs           | 2 +-
 .../Processing/Processors/Overlays/GlowProcessor.cs           | 1 -
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
index 99c57171cf..6cf1a95266 100644
--- a/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryOrderedDitherProcessor.cs
@@ -8,6 +8,9 @@ using SixLabors.ImageSharp.Processing.Processors.Dithering;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Binarization
 {
+    /// <summary>
+    /// Defines a binary threshold filtering using ordered dithering.
+    /// </summary>
     public class BinaryOrderedDitherProcessor : IImageProcessor
     {
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
index 50086936cd..83701aa8a2 100644
--- a/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor.cs
@@ -41,12 +41,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
         public float Threshold { get; }
 
         /// <summary>
-        /// Gets or sets the color to use for pixels that are above the threshold.
+        /// Gets the color to use for pixels that are above the threshold.
         /// </summary>
         public Color UpperColor { get; }
 
         /// <summary>
-        /// Gets or sets the color to use for pixels that fall below the threshold.
+        /// Gets the color to use for pixels that fall below the threshold.
         /// </summary>
         public Color LowerColor { get; }
 
diff --git a/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
index 0dd0c41188..62848172a1 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/BackgroundColorProcessor.cs
@@ -6,7 +6,7 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing.Processors.Overlays
 {
     /// <summary>
-    /// Defines a processing operation to replace the background color of an <see cref="Image"/>. 
+    /// Defines a processing operation to replace the background color of an <see cref="Image"/>.
     /// </summary>
     public sealed class BackgroundColorProcessor : IImageProcessor
     {
diff --git a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
index 4927a0ed7a..dcdddb217c 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
@@ -20,7 +20,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         {
         }
 
-
         /// <summary>
         /// Initializes a new instance of the <see cref="GlowProcessor" /> class.
         /// </summary>

From 6a9123b09c016ed2d33648963ba880ccada550f1 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Fri, 10 May 2019 20:28:46 +0200
Subject: [PATCH 157/223] Switched back to the default reference decoder

---
 tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index a56cee47d8..f3d6e0fa8e 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -153,13 +153,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
         [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_8Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
-            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false, referenceDecoder: new MagickReferenceDecoder());
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
 
         [Theory]
         [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
         [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_8Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
-            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true, referenceDecoder: new MagickReferenceDecoder());
+            where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
@@ -167,7 +167,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         public void Encode_PreservesAlpha<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
-        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true, IImageDecoder referenceDecoder = null)
+        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
@@ -181,7 +181,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 var encoder = new BmpEncoder { BitsPerPixel = bitsPerPixel, SupportTransparency = supportTransparency };
 
                 // Does DebugSave & load reference CompareToReferenceInput():
-                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder, referenceDecoder: referenceDecoder);
+                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder);
             }
         }
     }

From 5d470807d8aad1ebb06c4c712389354b94f74eca Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 10 May 2019 22:59:43 +0200
Subject: [PATCH 158/223] Made PaletteQuantizer non-generic all the way

---
 src/ImageSharp/Color/Color.WebSafePalette.cs  |   2 +-
 src/ImageSharp/Color/Color.WernerPalette.cs   |   2 +-
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  |  11 +-
 .../Processing/DiffuseExtensions.cs           |   4 +-
 src/ImageSharp/Processing/DitherExtensions.cs |   4 +-
 .../ErrorDiffusionPaletteProcessor.cs         |   2 +-
 .../OrderedDitherPaletteProcessor.cs          |   2 +-
 .../Dithering/PaletteDitherProcessor.cs       |  10 +-
 .../PaletteDitherProcessor{TPixel}.cs         |  51 ++++----
 .../Processors/Overlays/GlowProcessor.cs      |   2 +-
 ...e{TPixel}.cs => FrameQuantizer{TPixel}.cs} |  43 +++++--
 .../OctreeFrameQuantizer{TPixel}.cs           |   6 +-
 .../PaletteFrameQuantizer{TPixel}.cs          |  13 ++-
 .../Quantization/PaletteQuantizer.cs          |  59 +++++-----
 .../Quantization/PaletteQuantizer{TPixel}.cs  | 110 ------------------
 .../Quantization/WebSafePaletteQuantizer.cs   |  13 +--
 .../Quantization/WernerPaletteQuantizer.cs    |  13 +--
 .../Quantization/WuFrameQuantizer{TPixel}.cs  |   6 +-
 .../Processing/Dithering/DitherTest.cs        |   2 +-
 .../Quantization/PaletteQuantizerTests.cs     |  28 ++---
 20 files changed, 143 insertions(+), 240 deletions(-)
 rename src/ImageSharp/Processing/Processors/Quantization/{FrameQuantizerBase{TPixel}.cs => FrameQuantizer{TPixel}.cs} (81%)
 delete mode 100644 src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer{TPixel}.cs

diff --git a/src/ImageSharp/Color/Color.WebSafePalette.cs b/src/ImageSharp/Color/Color.WebSafePalette.cs
index 506432ac2d..8e5fb2a55b 100644
--- a/src/ImageSharp/Color/Color.WebSafePalette.cs
+++ b/src/ImageSharp/Color/Color.WebSafePalette.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Gets a collection of named, web safe colors as defined in the CSS Color Module Level 4.
         /// </summary>
-        public static ReadOnlySpan<Color> WebSafePalette => WebSafePaletteLazy.Value;
+        public static ReadOnlyMemory<Color> WebSafePalette => WebSafePaletteLazy.Value;
 
         private static Color[] CreateWebSafePalette() => new[]
         {
diff --git a/src/ImageSharp/Color/Color.WernerPalette.cs b/src/ImageSharp/Color/Color.WernerPalette.cs
index 37980b15fd..768fe065cd 100644
--- a/src/ImageSharp/Color/Color.WernerPalette.cs
+++ b/src/ImageSharp/Color/Color.WernerPalette.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp
         /// Gets a collection of colors as defined in the original second edition of Werner’s Nomenclature of Colours 1821.
         /// The hex codes were collected and defined by Nicholas Rougeux <see href="https://www.c82.net/werner"/>.
         /// </summary>
-        public static ReadOnlySpan<Color> WernerPalette => WernerPaletteLazy.Value;
+        public static ReadOnlyMemory<Color> WernerPalette => WernerPaletteLazy.Value;
 
         private static Color[] CreateWernerPalette() => new[]
         {
diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index 12a515cca7..2770790a28 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -144,8 +144,6 @@ namespace SixLabors.ImageSharp.Formats.Gif
         private void EncodeGlobal<TPixel>(Image<TPixel> image, QuantizedFrame<TPixel> quantized, int transparencyIndex, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
-            var palleteQuantizer = new PaletteQuantizer<TPixel>(quantized.Palette, this.quantizer.Diffuser);
-
             for (int i = 0; i < image.Frames.Count; i++)
             {
                 ImageFrame<TPixel> frame = image.Frames[i];
@@ -160,10 +158,13 @@ namespace SixLabors.ImageSharp.Formats.Gif
                 }
                 else
                 {
-                    using (IFrameQuantizer<TPixel> palleteFrameQuantizer = palleteQuantizer.CreateFrameQuantizer(image.GetConfiguration()))
-                    using (QuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
+                    using (IFrameQuantizer<TPixel> palleteFrameQuantizer =
+                        new PaletteFrameQuantizer<TPixel>(this.quantizer.Diffuser, quantized.Palette))
                     {
-                        this.WriteImageData(paletteQuantized, stream);
+                        using (QuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
+                        {
+                            this.WriteImageData(paletteQuantized, stream);
+                        }    
                     }
                 }
             }
diff --git a/src/ImageSharp/Processing/DiffuseExtensions.cs b/src/ImageSharp/Processing/DiffuseExtensions.cs
index cd714c3da3..f9a1bdde0e 100644
--- a/src/ImageSharp/Processing/DiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/DiffuseExtensions.cs
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
             float threshold,
-            ReadOnlySpan<Color> palette) =>
+            ReadOnlyMemory<Color> palette) =>
             source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold, palette));
 
         /// <summary>
@@ -91,7 +91,7 @@ namespace SixLabors.ImageSharp.Processing.Dithering
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
             float threshold,
-            ReadOnlySpan<Color> palette,
+            ReadOnlyMemory<Color> palette,
             Rectangle rectangle) =>
             source.ApplyProcessor(new ErrorDiffusionPaletteProcessor(diffuser, threshold, palette), rectangle);
     }
diff --git a/src/ImageSharp/Processing/DitherExtensions.cs b/src/ImageSharp/Processing/DitherExtensions.cs
index 55794aec20..f83a9e9e81 100644
--- a/src/ImageSharp/Processing/DitherExtensions.cs
+++ b/src/ImageSharp/Processing/DitherExtensions.cs
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.Processing
         public static IImageProcessingContext Dither(
             this IImageProcessingContext source,
             IOrderedDither dither,
-            ReadOnlySpan<Color> palette) =>
+            ReadOnlyMemory<Color> palette) =>
             source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither, palette));
 
         /// <summary>
@@ -72,7 +72,7 @@ namespace SixLabors.ImageSharp.Processing
         public static IImageProcessingContext Dither(
             this IImageProcessingContext source,
             IOrderedDither dither,
-            ReadOnlySpan<Color> palette,
+            ReadOnlyMemory<Color> palette,
             Rectangle rectangle) =>
             source.ApplyProcessor(new OrderedDitherPaletteProcessor(dither, palette), rectangle);
     }
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
index 5436a7733f..e0b79c2b20 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffusionPaletteProcessor.cs
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// <param name="diffuser">The error diffuser</param>
         /// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser, float threshold, ReadOnlySpan<Color> palette)
+        public ErrorDiffusionPaletteProcessor(IErrorDiffuser diffuser, float threshold, ReadOnlyMemory<Color> palette)
             : base(palette)
         {
             Guard.NotNull(diffuser, nameof(diffuser));
diff --git a/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
index ba7c1e9980..ac6554d4c1 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/OrderedDitherPaletteProcessor.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         /// </summary>
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        public OrderedDitherPaletteProcessor(IOrderedDither dither, ReadOnlySpan<Color> palette)
+        public OrderedDitherPaletteProcessor(IOrderedDither dither, ReadOnlyMemory<Color> palette)
             : base(palette) => this.Dither = dither ?? throw new ArgumentNullException(nameof(dither));
 
         /// <summary>
diff --git a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
index 904d026345..de798b64bc 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor.cs
@@ -12,23 +12,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// </summary>
     public abstract class PaletteDitherProcessor : IImageProcessor
     {
-        private readonly Color[] palette;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteDitherProcessor"/> class.
         /// </summary>
         /// <param name="palette">The palette to select substitute colors from.</param>
-        protected PaletteDitherProcessor(ReadOnlySpan<Color> palette)
+        protected PaletteDitherProcessor(ReadOnlyMemory<Color> palette)
         {
-            // This shouldn't be a perf issue:
-            // these arrays are small, and created with low frequency.
-            this.palette = palette.ToArray();
+            this.Palette = palette;
         }
 
         /// <summary>
         /// Gets the palette to select substitute colors from.
         /// </summary>
-        public ReadOnlySpan<Color> Palette => this.palette;
+        public ReadOnlyMemory<Color> Palette { get; }
 
         /// <inheritdoc />
         public abstract IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
diff --git a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
index 334eab833c..205b589b1e 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs
@@ -20,13 +20,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     {
         private readonly Dictionary<TPixel, PixelPair<TPixel>> cache = new Dictionary<TPixel, PixelPair<TPixel>>();
 
+        private TPixel[] palette;
+
         /// <summary>
         /// The vector representation of the image palette.
         /// </summary>
         private Vector4[] paletteVector;
 
-        private TPixel[] palette;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteDitherProcessor{TPixel}"/> class.
         /// </summary>
@@ -37,6 +37,33 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
 
         protected PaletteDitherProcessor Definition { get; }
 
+        protected override void BeforeFrameApply(
+            ImageFrame<TPixel> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            base.BeforeFrameApply(source, sourceRectangle, configuration);
+
+            // Lazy init palette:
+            if (this.palette is null)
+            {
+                ReadOnlySpan<Color> sourcePalette = this.Definition.Palette.Span;
+                this.palette = new TPixel[sourcePalette.Length];
+                Color.ToPixel<TPixel>(configuration, sourcePalette, this.palette);
+            }
+
+            // Lazy init paletteVector:
+            if (this.paletteVector is null)
+            {
+                this.paletteVector = new Vector4[this.palette.Length];
+                PixelOperations<TPixel>.Instance.ToVector4(
+                    configuration,
+                    (ReadOnlySpan<TPixel>)this.palette,
+                    (Span<Vector4>)this.paletteVector,
+                    PixelConversionModifiers.Scale);
+            }
+        }
+
         /// <summary>
         /// Returns the two closest colors from the palette calculated via Euclidean distance in the Rgba space.
         /// </summary>
@@ -88,25 +115,5 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
 
             return pair;
         }
-
-        protected override void BeforeFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            base.BeforeFrameApply(source, sourceRectangle, configuration);
-
-            // Lazy init palette:
-            if (this.palette is null)
-            {
-                ReadOnlySpan<Color> sourcePalette = this.Definition.Palette;
-                this.palette = new TPixel[sourcePalette.Length];
-                Color.ToPixel<TPixel>(configuration, sourcePalette, this.palette);
-            }
-
-            // Lazy init paletteVector:
-            if (this.paletteVector is null)
-            {
-                this.paletteVector = new Vector4[this.palette.Length];
-                PixelOperations<TPixel>.Instance.ToVector4(configuration, (ReadOnlySpan<TPixel>)this.palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
index dcdddb217c..255be5ed59 100644
--- a/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Overlays/GlowProcessor.cs
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Overlays
         }
 
         /// <summary>
-        /// Gets the options effecting blending and composition
+        /// Gets the options effecting blending and composition.
         /// </summary>
         public GraphicsOptions GraphicsOptions { get; }
 
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
similarity index 81%
rename from src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
rename to src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
index f23343f6d7..6d8136513f 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizerBase{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// The base class for all <see cref="IFrameQuantizer{TPixel}"/> implementations
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public abstract class FrameQuantizerBase<TPixel> : IFrameQuantizer<TPixel>
+    public abstract class FrameQuantizer<TPixel> : IFrameQuantizer<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         private Vector4[] paletteVector;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="FrameQuantizerBase{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="FrameQuantizer{TPixel}"/> class.
         /// </summary>
         /// <param name="quantizer">The quantizer</param>
         /// <param name="singlePass">
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// only call the <see cref="SecondPass(ImageFrame{TPixel}, Span{byte}, ReadOnlySpan{TPixel},  int, int)"/> method.
         /// If two passes are required, the code will also call <see cref="FirstPass(ImageFrame{TPixel}, int, int)"/>.
         /// </remarks>
-        protected FrameQuantizerBase(IQuantizer quantizer, bool singlePass)
+        protected FrameQuantizer(IQuantizer quantizer, bool singlePass)
         {
             Guard.NotNull(quantizer, nameof(quantizer));
 
@@ -52,6 +52,25 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.Dither = this.Diffuser != null;
             this.singlePass = singlePass;
         }
+        
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FrameQuantizer{TPixel}"/> class.
+        /// </summary>
+        /// <param name="diffuser">The diffuser</param>
+        /// <param name="singlePass">
+        /// If true, the quantization process only needs to loop through the source pixels once
+        /// </param>
+        /// <remarks>
+        /// If you construct this class with a <value>true</value> for <paramref name="singlePass"/>, then the code will
+        /// only call the <see cref="SecondPass(ImageFrame{TPixel}, Span{byte}, ReadOnlySpan{TPixel},  int, int)"/> method.
+        /// If two passes are required, the code will also call <see cref="FirstPass(ImageFrame{TPixel}, int, int)"/>.
+        /// </remarks>
+        protected FrameQuantizer(IErrorDiffuser diffuser, bool singlePass)
+        {
+            this.Diffuser = diffuser;
+            this.Dither = this.Diffuser != null;
+            this.singlePass = singlePass;
+        }
 
         /// <inheritdoc />
         public bool Dither { get; }
@@ -77,22 +96,28 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             }
 
             // Collect the palette. Required before the second pass runs.
-            TPixel[] palette = this.GetPalette();
+            ReadOnlyMemory<TPixel> palette = this.GetPalette();
             this.paletteVector = new Vector4[palette.Length];
-            PixelOperations<TPixel>.Instance.ToVector4(image.Configuration, (ReadOnlySpan<TPixel>)palette, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
-            var quantizedFrame = new QuantizedFrame<TPixel>(image.MemoryAllocator, width, height, palette);
+            PixelOperations<TPixel>.Instance.ToVector4(image.Configuration, palette.Span, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
+
+            // TODO: Pass ReadOnlyMemory<T> instead of array!
+            var quantizedFrame = new QuantizedFrame<TPixel>(
+                image.MemoryAllocator,
+                width,
+                height,
+                palette.Span.ToArray());
 
             if (this.Dither)
             {
                 // We clone the image as we don't want to alter the original via dithering.
                 using (ImageFrame<TPixel> clone = image.Clone())
                 {
-                    this.SecondPass(clone, quantizedFrame.GetPixelSpan(), palette, width, height);
+                    this.SecondPass(clone, quantizedFrame.GetPixelSpan(), palette.Span, width, height);
                 }
             }
             else
             {
-                this.SecondPass(image, quantizedFrame.GetPixelSpan(), palette, width, height);
+                this.SecondPass(image, quantizedFrame.GetPixelSpan(), palette.Span, width, height);
             }
 
             return quantizedFrame;
@@ -134,7 +159,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <returns>
         /// <see cref="T:TPixel[]"/>
         /// </returns>
-        protected abstract TPixel[] GetPalette();
+        protected abstract ReadOnlyMemory<TPixel> GetPalette();
 
         /// <summary>
         /// Returns the index of the first instance of the transparent color in the palette.
diff --git a/src/ImageSharp/Processing/Processors/Quantization/OctreeFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/OctreeFrameQuantizer{TPixel}.cs
index dd56375f63..85a4d20295 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/OctreeFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/OctreeFrameQuantizer{TPixel}.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// <see href="http://msdn.microsoft.com/en-us/library/aa479306.aspx"/>
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal sealed class OctreeFrameQuantizer<TPixel> : FrameQuantizerBase<TPixel>
+    internal sealed class OctreeFrameQuantizer<TPixel> : FrameQuantizer<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
@@ -136,10 +136,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             }
         }
 
-        internal TPixel[] AotGetPalette() => this.GetPalette();
+        internal ReadOnlyMemory<TPixel> AotGetPalette() => this.GetPalette();
 
         /// <inheritdoc/>
-        protected override TPixel[] GetPalette() => this.octree.Palletize(this.colors);
+        protected override ReadOnlyMemory<TPixel> GetPalette() => this.octree.Palletize(this.colors);
 
         /// <summary>
         /// Process the pixel in the second pass of the algorithm.
diff --git a/src/ImageSharp/Processing/Processors/Quantization/PaletteFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/PaletteFrameQuantizer{TPixel}.cs
index f8a19f8c40..265c343e68 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/PaletteFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/PaletteFrameQuantizer{TPixel}.cs
@@ -6,6 +6,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Dithering;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 {
@@ -14,21 +15,21 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// <see href="http://msdn.microsoft.com/en-us/library/aa479306.aspx"/>
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal sealed class PaletteFrameQuantizer<TPixel> : FrameQuantizerBase<TPixel>
+    internal sealed class PaletteFrameQuantizer<TPixel> : FrameQuantizer<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         /// <summary>
         /// The reduced image palette.
         /// </summary>
-        private readonly TPixel[] palette;
+        private readonly ReadOnlyMemory<TPixel> palette;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteFrameQuantizer{TPixel}"/> class.
         /// </summary>
-        /// <param name="quantizer">The palette quantizer.</param>
+        /// <param name="diffuser">The palette quantizer.</param>
         /// <param name="colors">An array of all colors in the palette.</param>
-        public PaletteFrameQuantizer(IQuantizer quantizer, TPixel[] colors)
-            : base(quantizer, true) => this.palette = colors;
+        public PaletteFrameQuantizer(IErrorDiffuser diffuser, ReadOnlyMemory<TPixel> colors)
+            : base(diffuser, true) => this.palette = colors;
 
         /// <inheritdoc/>
         protected override void SecondPass(
@@ -85,7 +86,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        protected override TPixel[] GetPalette() => this.palette;
+        protected override ReadOnlyMemory<TPixel> GetPalette() => this.palette;
 
         /// <summary>
         /// Process the pixel in the second pass of the algorithm
diff --git a/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer.cs b/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer.cs
index 6b2be3d038..ba434a4b21 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 
@@ -14,61 +15,65 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// By default the quantizer uses <see cref="KnownDiffusers.FloydSteinberg"/> dithering.
     /// </para>
     /// </summary>
-    public abstract class PaletteQuantizer : IQuantizer
+    public class PaletteQuantizer : IQuantizer
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteQuantizer"/> class.
         /// </summary>
-        protected PaletteQuantizer()
-             : this(true)
+        /// <param name="palette">The palette.</param>
+        public PaletteQuantizer(ReadOnlyMemory<Color> palette)
+            : this(palette, true)
         {
         }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteQuantizer"/> class.
         /// </summary>
+        /// <param name="palette">The palette.</param>
         /// <param name="dither">Whether to apply dithering to the output image</param>
-        protected PaletteQuantizer(bool dither)
-            : this(GetDiffuser(dither))
+        public PaletteQuantizer(ReadOnlyMemory<Color> palette, bool dither)
+            : this(palette, GetDiffuser(dither))
         {
         }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PaletteQuantizer"/> class.
         /// </summary>
+        /// <param name="palette">The palette.</param>
         /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
-        protected PaletteQuantizer(IErrorDiffuser diffuser) => this.Diffuser = diffuser;
+        public PaletteQuantizer(ReadOnlyMemory<Color> palette, IErrorDiffuser diffuser)
+        {
+            this.Palette = palette;
+            this.Diffuser = diffuser;
+        }
 
         /// <inheritdoc />
         public IErrorDiffuser Diffuser { get; }
 
-        /// <inheritdoc />
-        public abstract IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration)
-            where TPixel : struct, IPixel<TPixel>;
-
-        /// <inheritdoc/>
-        public abstract IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, int maxColors)
-            where TPixel : struct, IPixel<TPixel>;
-
         /// <summary>
-        /// Creates the generic frame quantizer.
+        /// Gets the palette.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="configuration">The <see cref="Configuration"/> to configure internal operations.</param>
-        /// <param name="palette">The color palette.</param>
-        /// <param name="maxColors">The maximum number of colors to hold in the color palette.</param>
-        /// <returns>The <see cref="IFrameQuantizer{TPixel}"/></returns>
-        protected IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, TPixel[] palette, int maxColors)
+        public ReadOnlyMemory<Color> Palette { get; }
+
+        /// <inheritdoc />
+        public IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration)
             where TPixel : struct, IPixel<TPixel>
         {
-            int max = Math.Min(QuantizerConstants.MaxColors, Math.Min(maxColors, palette.Length));
+            TPixel[] palette = new TPixel[this.Palette.Length];
+            Color.ToPixel(configuration, this.Palette.Span, palette.AsSpan());
+            return new PaletteFrameQuantizer<TPixel>(this.Diffuser, palette);
+        }
 
-            if (max != palette.Length)
-            {
-                return new PaletteFrameQuantizer<TPixel>(this, palette.AsSpan(0, max).ToArray());
-            }
+        /// <inheritdoc/>
+        public IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, int maxColors)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            maxColors = maxColors.Clamp(QuantizerConstants.MinColors, QuantizerConstants.MaxColors);
+            int max = Math.Min(maxColors, this.Palette.Length);
 
-            return new PaletteFrameQuantizer<TPixel>(this, palette);
+            TPixel[] palette = new TPixel[max];
+            Color.ToPixel(configuration, this.Palette.Span.Slice(0, max), palette.AsSpan());
+            return new PaletteFrameQuantizer<TPixel>(this.Diffuser, palette);
         }
 
         private static IErrorDiffuser GetDiffuser(bool dither) => dither ? KnownDiffusers.FloydSteinberg : null;
diff --git a/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer{TPixel}.cs
deleted file mode 100644
index a350adfc0c..0000000000
--- a/src/ImageSharp/Processing/Processors/Quantization/PaletteQuantizer{TPixel}.cs
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Runtime.CompilerServices;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Dithering;
-
-namespace SixLabors.ImageSharp.Processing.Processors.Quantization
-{
-    /// <summary>
-    /// A generic palette quantizer.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class PaletteQuantizer<TPixel> : IQuantizer
-            where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="PaletteQuantizer{TPixel}"/> class.
-        /// </summary>
-        /// <param name="palette">The color palette to use.</param>
-        public PaletteQuantizer(TPixel[] palette)
-             : this(palette, true)
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="PaletteQuantizer{TPixel}"/> class.
-        /// </summary>
-        /// <param name="palette">The color palette to use.</param>
-        /// <param name="dither">Whether to apply dithering to the output image</param>
-        public PaletteQuantizer(TPixel[] palette, bool dither)
-            : this(palette, GetDiffuser(dither))
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="PaletteQuantizer{TPixel}"/> class.
-        /// </summary>
-        /// <param name="palette">The color palette to use.</param>
-        /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
-        public PaletteQuantizer(TPixel[] palette, IErrorDiffuser diffuser)
-        {
-            Guard.MustBeBetweenOrEqualTo(palette.Length, QuantizerConstants.MinColors, QuantizerConstants.MaxColors, nameof(palette));
-            this.Palette = palette;
-            this.Diffuser = diffuser;
-        }
-
-        /// <inheritdoc/>
-        public IErrorDiffuser Diffuser { get; }
-
-        /// <summary>
-        /// Gets the palette.
-        /// </summary>
-        public TPixel[] Palette { get; }
-
-        /// <summary>
-        /// Creates the generic frame quantizer.
-        /// </summary>
-        /// <param name="configuration">The <see cref="Configuration"/> to configure internal operations.</param>
-        /// <returns>The <see cref="IFrameQuantizer{TPixel}"/>.</returns>
-        public IFrameQuantizer<TPixel> CreateFrameQuantizer(Configuration configuration)
-            => ((IQuantizer)this).CreateFrameQuantizer<TPixel>(configuration);
-
-        /// <summary>
-        /// Creates the generic frame quantizer.
-        /// </summary>
-        /// <param name="configuration">The <see cref="Configuration"/> to configure internal operations.</param>
-        /// <param name="maxColors">The maximum number of colors to hold in the color palette.</param>
-        /// <returns>The <see cref="IFrameQuantizer{TPixel}"/>.</returns>
-        public IFrameQuantizer<TPixel> CreateFrameQuantizer(Configuration configuration, int maxColors)
-            => ((IQuantizer)this).CreateFrameQuantizer<TPixel>(configuration, maxColors);
-
-        /// <inheritdoc/>
-        IFrameQuantizer<TPixel1> IQuantizer.CreateFrameQuantizer<TPixel1>(Configuration configuration)
-        {
-            if (!typeof(TPixel).Equals(typeof(TPixel1)))
-            {
-                throw new InvalidOperationException("Generic method type must be the same as class type.");
-            }
-
-            TPixel[] paletteRef = this.Palette;
-            return new PaletteFrameQuantizer<TPixel1>(this, Unsafe.As<TPixel[], TPixel1[]>(ref paletteRef));
-        }
-
-        /// <inheritdoc/>
-        IFrameQuantizer<TPixel1> IQuantizer.CreateFrameQuantizer<TPixel1>(Configuration configuration, int maxColors)
-        {
-            if (!typeof(TPixel).Equals(typeof(TPixel1)))
-            {
-                throw new InvalidOperationException("Generic method type must be the same as class type.");
-            }
-
-            TPixel[] paletteRef = this.Palette;
-            TPixel1[] castPalette = Unsafe.As<TPixel[], TPixel1[]>(ref paletteRef);
-
-            maxColors = maxColors.Clamp(QuantizerConstants.MinColors, QuantizerConstants.MaxColors);
-            int max = Math.Min(maxColors, castPalette.Length);
-
-            if (max != castPalette.Length)
-            {
-                return new PaletteFrameQuantizer<TPixel1>(this, castPalette.AsSpan(0, max).ToArray());
-            }
-
-            return new PaletteFrameQuantizer<TPixel1>(this, castPalette);
-        }
-
-        private static IErrorDiffuser GetDiffuser(bool dither) => dither ? KnownDiffusers.FloydSteinberg : null;
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WebSafePaletteQuantizer.cs b/src/ImageSharp/Processing/Processors/Quantization/WebSafePaletteQuantizer.cs
index 93630a9166..3f6dfde281 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WebSafePaletteQuantizer.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WebSafePaletteQuantizer.cs
@@ -15,6 +15,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// Initializes a new instance of the <see cref="WebSafePaletteQuantizer" /> class.
         /// </summary>
         public WebSafePaletteQuantizer()
+            : this(true)
         {
         }
 
@@ -23,7 +24,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <param name="dither">Whether to apply dithering to the output image</param>
         public WebSafePaletteQuantizer(bool dither)
-            : base(dither)
+            : base(Color.WebSafePalette, dither)
         {
         }
 
@@ -32,16 +33,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
         public WebSafePaletteQuantizer(IErrorDiffuser diffuser)
-            : base(diffuser)
+            : base(Color.WebSafePalette, diffuser)
         {
         }
-
-        /// <inheritdoc />
-        public override IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration)
-            => this.CreateFrameQuantizer<TPixel>(configuration, NamedColors<TPixel>.WebSafePalette.Length);
-
-        /// <inheritdoc/>
-        public override IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, int maxColors)
-            => this.CreateFrameQuantizer(configuration, NamedColors<TPixel>.WebSafePalette, maxColors);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WernerPaletteQuantizer.cs b/src/ImageSharp/Processing/Processors/Quantization/WernerPaletteQuantizer.cs
index 2ff9f5090c..d659ecabf7 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WernerPaletteQuantizer.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WernerPaletteQuantizer.cs
@@ -16,6 +16,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// Initializes a new instance of the <see cref="WernerPaletteQuantizer" /> class.
         /// </summary>
         public WernerPaletteQuantizer()
+            : this(true)
         {
         }
 
@@ -24,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <param name="dither">Whether to apply dithering to the output image</param>
         public WernerPaletteQuantizer(bool dither)
-            : base(dither)
+            : base(Color.WernerPalette, dither)
         {
         }
 
@@ -33,16 +34,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <param name="diffuser">The error diffusion algorithm, if any, to apply to the output image</param>
         public WernerPaletteQuantizer(IErrorDiffuser diffuser)
-            : base(diffuser)
+            : base(Color.WernerPalette, diffuser)
         {
         }
-
-        /// <inheritdoc />
-        public override IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration)
-            => this.CreateFrameQuantizer<TPixel>(configuration, NamedColors<TPixel>.WernerPalette.Length);
-
-        /// <inheritdoc/>
-        public override IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, int maxColors)
-            => this.CreateFrameQuantizer(configuration, NamedColors<TPixel>.WernerPalette, maxColors);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
index 1f1513adf1..95918f564a 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
     /// </para>
     /// </remarks>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal sealed class WuFrameQuantizer<TPixel> : FrameQuantizerBase<TPixel>
+    internal sealed class WuFrameQuantizer<TPixel> : FrameQuantizer<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         // The following two variables determine the amount of bits to preserve when calculating the histogram.
@@ -171,10 +171,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.tag?.Dispose();
         }
 
-        internal TPixel[] AotGetPalette() => this.GetPalette();
+        internal ReadOnlyMemory<TPixel> AotGetPalette() => this.GetPalette();
 
         /// <inheritdoc/>
-        protected override TPixel[] GetPalette()
+        protected override ReadOnlyMemory<TPixel> GetPalette()
         {
             if (this.palette is null)
             {
diff --git a/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs b/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
index 59dcde2a63..d91688cd2c 100644
--- a/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Dithering/DitherTest.cs
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Binarization
             this.operations.Dither(this.orderedDither);
             OrderedDitherPaletteProcessor p = this.Verify<OrderedDitherPaletteProcessor>();
             Assert.Equal(this.orderedDither, p.Dither);
-            Assert.Equal(Color.WebSafePalette.ToArray(), p.Palette);
+            Assert.Equal(Color.WebSafePalette, p.Palette);
         }
 
         [Fact]
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Quantization/PaletteQuantizerTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Quantization/PaletteQuantizerTests.cs
index a4e6edd53e..05ce700476 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Quantization/PaletteQuantizerTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Quantization/PaletteQuantizerTests.cs
@@ -11,21 +11,21 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Quantization
 {
     public class PaletteQuantizerTests
     {
-        private static readonly Rgba32[] Rgb = new Rgba32[] { Rgba32.Red, Rgba32.Green, Rgba32.Blue };
+        private static readonly Color[] Rgb = new Color[] { Rgba32.Red, Rgba32.Green, Rgba32.Blue };
 
         [Fact]
         public void PaletteQuantizerConstructor()
         {
-            var quantizer = new PaletteQuantizer<Rgba32>(Rgb);
+            var quantizer = new PaletteQuantizer(Rgb);
 
             Assert.Equal(Rgb, quantizer.Palette);
             Assert.Equal(KnownDiffusers.FloydSteinberg, quantizer.Diffuser);
 
-            quantizer = new PaletteQuantizer<Rgba32>(Rgb, false);
+            quantizer = new PaletteQuantizer(Rgb, false);
             Assert.Equal(Rgb, quantizer.Palette);
             Assert.Null(quantizer.Diffuser);
 
-            quantizer = new PaletteQuantizer<Rgba32>(Rgb, KnownDiffusers.Atkinson);
+            quantizer = new PaletteQuantizer(Rgb, KnownDiffusers.Atkinson);
             Assert.Equal(Rgb, quantizer.Palette);
             Assert.Equal(KnownDiffusers.Atkinson, quantizer.Diffuser);
         }
@@ -33,35 +33,27 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Quantization
         [Fact]
         public void PaletteQuantizerCanCreateFrameQuantizer()
         {
-            var quantizer = new PaletteQuantizer<Rgba32>(Rgb);
-            IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer(Configuration.Default);
+            var quantizer = new PaletteQuantizer(Rgb);
+            IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(Configuration.Default);
 
             Assert.NotNull(frameQuantizer);
             Assert.True(frameQuantizer.Dither);
             Assert.Equal(KnownDiffusers.FloydSteinberg, frameQuantizer.Diffuser);
 
-            quantizer = new PaletteQuantizer<Rgba32>(Rgb, false);
-            frameQuantizer = quantizer.CreateFrameQuantizer(Configuration.Default);
+            quantizer = new PaletteQuantizer(Rgb, false);
+            frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(Configuration.Default);
 
             Assert.NotNull(frameQuantizer);
             Assert.False(frameQuantizer.Dither);
             Assert.Null(frameQuantizer.Diffuser);
 
-            quantizer = new PaletteQuantizer<Rgba32>(Rgb, KnownDiffusers.Atkinson);
-            frameQuantizer = quantizer.CreateFrameQuantizer(Configuration.Default);
+            quantizer = new PaletteQuantizer(Rgb, KnownDiffusers.Atkinson);
+            frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(Configuration.Default);
             Assert.NotNull(frameQuantizer);
             Assert.True(frameQuantizer.Dither);
             Assert.Equal(KnownDiffusers.Atkinson, frameQuantizer.Diffuser);
         }
 
-        [Fact]
-        public void PaletteQuantizerThrowsOnInvalidGenericMethodCall()
-        {
-            var quantizer = new PaletteQuantizer<Rgba32>(Rgb);
-
-            Assert.Throws<InvalidOperationException>(() => ((IQuantizer)quantizer).CreateFrameQuantizer<Rgb24>(Configuration.Default));
-        }
-
         [Fact]
         public void KnownQuantizersWebSafeTests()
         {

From b68699c82bf968bf167322635e57d4a5d49ae657 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 10 May 2019 23:11:04 +0200
Subject: [PATCH 159/223] QuantizedFrame<T> using ReadOnlyMemory<T>

---
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  |  4 +-
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |  2 +-
 .../Quantization/FrameQuantizer{TPixel}.cs    | 84 +++++++++----------
 .../Quantization/QuantizeProcessor{TPixel}.cs |  5 +-
 .../Quantization/QuantizedFrame{TPixel}.cs    |  4 +-
 .../Quantization/QuantizedImageTests.cs       |  7 +-
 .../Quantization/WuQuantizerTests.cs          | 10 ++-
 7 files changed, 62 insertions(+), 54 deletions(-)

diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index 2770790a28..9270bb6b1f 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -233,7 +233,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             {
                 Span<Rgba32> rgbaSpan = rgbaBuffer.GetSpan();
                 ref Rgba32 paletteRef = ref MemoryMarshal.GetReference(rgbaSpan);
-                PixelOperations<TPixel>.Instance.ToRgba32(this.configuration, quantized.Palette, rgbaSpan);
+                PixelOperations<TPixel>.Instance.ToRgba32(this.configuration, quantized.Palette.Span, rgbaSpan);
 
                 for (int i = quantized.Palette.Length - 1; i >= 0; i--)
                 {
@@ -436,7 +436,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             {
                 PixelOperations<TPixel>.Instance.ToRgb24Bytes(
                     this.configuration,
-                    image.Palette.AsSpan(),
+                    image.Palette.Span,
                     colorTable.GetSpan(),
                     pixelCount);
                 stream.Write(colorTable.Array, 0, colorTableLength);
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 7415b07532..db0c7f2585 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -666,7 +666,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             where TPixel : struct, IPixel<TPixel>
         {
             // Grab the palette and write it to the stream.
-            TPixel[] palette = quantized.Palette;
+            ReadOnlySpan<TPixel> palette = quantized.Palette.Span;
             int paletteLength = Math.Min(palette.Length, 256);
             int colorTableLength = paletteLength * 3;
             bool anyAlpha = false;
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
index 6d8136513f..eac31b21d0 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Dithering;
 
@@ -52,7 +53,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.Dither = this.Diffuser != null;
             this.singlePass = singlePass;
         }
-        
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FrameQuantizer{TPixel}"/> class.
         /// </summary>
@@ -73,10 +74,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <inheritdoc />
-        public bool Dither { get; }
+        public IErrorDiffuser Diffuser { get; }
 
         /// <inheritdoc />
-        public IErrorDiffuser Diffuser { get; }
+        public bool Dither { get; }
+
+        /// <inheritdoc/>
+        public virtual void Dispose()
+        {
+        }
 
         /// <inheritdoc/>
         public virtual QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
@@ -98,14 +104,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             // Collect the palette. Required before the second pass runs.
             ReadOnlyMemory<TPixel> palette = this.GetPalette();
             this.paletteVector = new Vector4[palette.Length];
-            PixelOperations<TPixel>.Instance.ToVector4(image.Configuration, palette.Span, (Span<Vector4>)this.paletteVector, PixelConversionModifiers.Scale);
+            PixelOperations<TPixel>.Instance.ToVector4(
+                image.Configuration,
+                palette.Span,
+                (Span<Vector4>)this.paletteVector,
+                PixelConversionModifiers.Scale);
 
-            // TODO: Pass ReadOnlyMemory<T> instead of array!
-            var quantizedFrame = new QuantizedFrame<TPixel>(
-                image.MemoryAllocator,
-                width,
-                height,
-                palette.Span.ToArray());
+            var quantizedFrame = new QuantizedFrame<TPixel>(image.MemoryAllocator, width, height, palette);
 
             if (this.Dither)
             {
@@ -123,11 +128,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             return quantizedFrame;
         }
 
-        /// <inheritdoc/>
-        public virtual void Dispose()
-        {
-        }
-
         /// <summary>
         /// Execute the first pass through the pixels in the image to create the palette.
         /// </summary>
@@ -139,19 +139,22 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <summary>
-        /// Execute a second pass through the image to assign the pixels to a palette entry.
+        /// Returns the closest color from the palette to the given color by calculating the
+        /// Euclidean distance in the Rgba colorspace.
         /// </summary>
-        /// <param name="source">The source image.</param>
-        /// <param name="output">The output pixel array.</param>
-        /// <param name="palette">The output color palette.</param>
-        /// <param name="width">The width in pixels of the image.</param>
-        /// <param name="height">The height in pixels of the image.</param>
-        protected abstract void SecondPass(
-            ImageFrame<TPixel> source,
-            Span<byte> output,
-            ReadOnlySpan<TPixel> palette,
-            int width,
-            int height);
+        /// <param name="pixel">The color.</param>
+        /// <returns>The <see cref="int"/></returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        protected byte GetClosestPixel(ref TPixel pixel)
+        {
+            // Check if the color is in the lookup table
+            if (this.distanceCache.TryGetValue(pixel, out byte value))
+            {
+                return value;
+            }
+
+            return this.GetClosestPixelSlow(ref pixel);
+        }
 
         /// <summary>
         /// Retrieve the palette for the quantized image.
@@ -185,22 +188,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <summary>
-        /// Returns the closest color from the palette to the given color by calculating the
-        /// Euclidean distance in the Rgba colorspace.
+        /// Execute a second pass through the image to assign the pixels to a palette entry.
         /// </summary>
-        /// <param name="pixel">The color.</param>
-        /// <returns>The <see cref="int"/></returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        protected byte GetClosestPixel(ref TPixel pixel)
-        {
-            // Check if the color is in the lookup table
-            if (this.distanceCache.TryGetValue(pixel, out byte value))
-            {
-                return value;
-            }
-
-            return this.GetClosestPixelSlow(ref pixel);
-        }
+        /// <param name="source">The source image.</param>
+        /// <param name="output">The output pixel array.</param>
+        /// <param name="palette">The output color palette.</param>
+        /// <param name="width">The width in pixels of the image.</param>
+        /// <param name="height">The height in pixels of the image.</param>
+        protected abstract void SecondPass(
+            ImageFrame<TPixel> source,
+            Span<byte> output,
+            ReadOnlySpan<TPixel> palette,
+            int width,
+            int height);
 
         [MethodImpl(MethodImplOptions.NoInlining)]
         private byte GetClosestPixelSlow(ref TPixel pixel)
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
index b52343a2ae..4f134d98d7 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
@@ -43,12 +43,15 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                 {
                     Span<TPixel> row = source.GetPixelRowSpan(y);
                     ReadOnlySpan<byte> quantizedPixelSpan = quantized.GetPixelSpan();
+
+                    ReadOnlySpan<TPixel> paletteSpan = quantized.Palette.Span;
+                    
                     int yy = y * source.Width;
 
                     for (int x = 0; x < source.Width; x++)
                     {
                         int i = x + yy;
-                        row[x] = quantized.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                        row[x] = paletteSpan[Math.Min(paletteCount, quantizedPixelSpan[i])];
                     }
                 }
             }
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
index 38862ef446..ae5b5dda86 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <param name="width">The image width.</param>
         /// <param name="height">The image height.</param>
         /// <param name="palette">The color palette.</param>
-        public QuantizedFrame(MemoryAllocator memoryAllocator, int width, int height, TPixel[] palette)
+        public QuantizedFrame(MemoryAllocator memoryAllocator, int width, int height, ReadOnlyMemory<TPixel> palette)
         {
             Guard.MustBeGreaterThan(width, 0, nameof(width));
             Guard.MustBeGreaterThan(height, 0, nameof(height));
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Gets the color palette of this <see cref="QuantizedFrame{TPixel}"/>.
         /// </summary>
-        public TPixel[] Palette { get; private set; }
+        public ReadOnlyMemory<TPixel> Palette { get; private set; }
 
         /// <summary>
         /// Gets the pixels of this <see cref="QuantizedFrame{TPixel}"/>.
diff --git a/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs b/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
index a0d7869e39..b0de058f80 100644
--- a/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
+++ b/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
@@ -1,6 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors.Quantization;
 
@@ -85,9 +87,10 @@ namespace SixLabors.ImageSharp.Tests
             // Transparent pixels are much more likely to be found at the end of a palette
             int index = -1;
             Rgba32 trans = default;
-            for (int i = quantized.Palette.Length - 1; i >= 0; i--)
+            ReadOnlySpan<TPixel> paletteSpan = quantized.Palette.Span;
+            for (int i = paletteSpan.Length - 1; i >= 0; i--)
             {
-                quantized.Palette[i].ToRgba32(ref trans);
+                paletteSpan[i].ToRgba32(ref trans);
 
                 if (trans.Equals(default))
                 {
diff --git a/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
index 3eacd74ea1..716273699e 100644
--- a/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
+++ b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                 Assert.Equal(1, result.Palette.Length);
                 Assert.Equal(1, result.GetPixelSpan().Length);
 
-                Assert.Equal(Rgba32.Black, result.Palette[0]);
+                Assert.Equal(Rgba32.Black, result.Palette.Span[0]);
                 Assert.Equal(0, result.GetPixelSpan()[0]);
             }
         }
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                 Assert.Equal(1, result.Palette.Length);
                 Assert.Equal(1, result.GetPixelSpan().Length);
 
-                Assert.Equal(default, result.Palette[0]);
+                Assert.Equal(default, result.Palette.Span[0]);
                 Assert.Equal(0, result.GetPixelSpan()[0]);
             }
         }
@@ -82,6 +82,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
 
                     var actualImage = new Image<Rgba32>(1, 256);
 
+                    ReadOnlySpan<Rgba32> paletteSpan = result.Palette.Span;
                     int paletteCount = result.Palette.Length - 1;
                     for (int y = 0; y < actualImage.Height; y++)
                     {
@@ -92,7 +93,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                         for (int x = 0; x < actualImage.Width; x++)
                         {
                             int i = x + yy;
-                            row[x] = result.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                            row[x] = paletteSpan[Math.Min(paletteCount, quantizedPixelSpan[i])];
                         }
                     }
 
@@ -146,6 +147,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                     Assert.Equal(4 * 8, result.Palette.Length);
                     Assert.Equal(256, result.GetPixelSpan().Length);
 
+                    ReadOnlySpan<Rgba32> paletteSpan = result.Palette.Span;
                     int paletteCount = result.Palette.Length - 1;
                     for (int y = 0; y < actualImage.Height; y++)
                     {
@@ -156,7 +158,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                         for (int x = 0; x < actualImage.Width; x++)
                         {
                             int i = x + yy;
-                            row[x] = result.Palette[Math.Min(paletteCount, quantizedPixelSpan[i])];
+                            row[x] = paletteSpan[Math.Min(paletteCount, quantizedPixelSpan[i])];
                         }
                     }
                 }

From 63ffdcb18f4281b3c5fe7b0a39df40265580a0dd Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 10 May 2019 23:31:46 +0200
Subject: [PATCH 160/223] Correct readonly-semantics for QuantizedFrame

---
 src/ImageSharp/Advanced/AotCompilerTools.cs   |  2 +-
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  |  2 +-
 src/ImageSharp/Formats/Gif/LzwEncoder.cs      |  6 ++---
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |  2 +-
 .../Quantization/FrameQuantizer{TPixel}.cs    |  7 ++---
 .../Quantization/QuantizeProcessor{TPixel}.cs |  2 +-
 .../Quantization/QuantizedFrame{TPixel}.cs    | 11 +++++---
 .../Quantization/WuFrameQuantizer{TPixel}.cs  | 26 ++++++++++++-------
 .../Processors/Quantization/WuQuantizer.cs    |  8 ++++--
 9 files changed, 41 insertions(+), 25 deletions(-)

diff --git a/src/ImageSharp/Advanced/AotCompilerTools.cs b/src/ImageSharp/Advanced/AotCompilerTools.cs
index eb6991e6a1..82df7304e5 100644
--- a/src/ImageSharp/Advanced/AotCompilerTools.cs
+++ b/src/ImageSharp/Advanced/AotCompilerTools.cs
@@ -104,7 +104,7 @@ namespace SixLabors.ImageSharp.Advanced
         private static void AotCompileWuQuantizer<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
-            var test = new WuFrameQuantizer<TPixel>(new WuQuantizer(false));
+            var test = new WuFrameQuantizer<TPixel>(Configuration.Default.MemoryAllocator, new WuQuantizer(false));
             test.QuantizeFrame(new ImageFrame<TPixel>(Configuration.Default, 1, 1));
             test.AotGetPalette();
         }
diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index 9270bb6b1f..ac97570941 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -164,7 +164,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                         using (QuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
                         {
                             this.WriteImageData(paletteQuantized, stream);
-                        }    
+                        }
                     }
                 }
             }
diff --git a/src/ImageSharp/Formats/Gif/LzwEncoder.cs b/src/ImageSharp/Formats/Gif/LzwEncoder.cs
index 2d32fd23aa..b4c80a3da1 100644
--- a/src/ImageSharp/Formats/Gif/LzwEncoder.cs
+++ b/src/ImageSharp/Formats/Gif/LzwEncoder.cs
@@ -180,7 +180,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// </summary>
         /// <param name="indexedPixels">The span of indexed pixels.</param>
         /// <param name="stream">The stream to write to.</param>
-        public void Encode(Span<byte> indexedPixels, Stream stream)
+        public void Encode(ReadOnlySpan<byte> indexedPixels, Stream stream)
         {
             // Write "initial code size" byte
             stream.WriteByte((byte)this.initialCodeSize);
@@ -251,7 +251,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <param name="indexedPixels">The span of indexed pixels.</param>
         /// <param name="intialBits">The initial bits.</param>
         /// <param name="stream">The stream to write to.</param>
-        private void Compress(Span<byte> indexedPixels, int intialBits, Stream stream)
+        private void Compress(ReadOnlySpan<byte> indexedPixels, int intialBits, Stream stream)
         {
             int fcode;
             int c;
@@ -375,7 +375,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// The <see cref="int"/>
         /// </returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private int NextPixel(Span<byte> indexedPixels)
+        private int NextPixel(ReadOnlySpan<byte> indexedPixels)
         {
             return indexedPixels[this.position++] & 0xFF;
         }
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index db0c7f2585..7bdced536b 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -676,7 +676,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             {
                 ref byte colorTableRef = ref MemoryMarshal.GetReference(colorTable.GetSpan());
                 ref byte alphaTableRef = ref MemoryMarshal.GetReference(alphaTable.GetSpan());
-                Span<byte> quantizedSpan = quantized.GetPixelSpan();
+                ReadOnlySpan<byte> quantizedSpan = quantized.GetPixelSpan();
 
                 Rgba32 rgba = default;
 
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
index eac31b21d0..d753b08a83 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <inheritdoc/>
-        public virtual QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
+        public QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
         {
             Guard.NotNull(image, nameof(image));
 
@@ -112,17 +112,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 
             var quantizedFrame = new QuantizedFrame<TPixel>(image.MemoryAllocator, width, height, palette);
 
+            Span<byte> pixelSpan = quantizedFrame.GetWritablePixelSpan();
             if (this.Dither)
             {
                 // We clone the image as we don't want to alter the original via dithering.
                 using (ImageFrame<TPixel> clone = image.Clone())
                 {
-                    this.SecondPass(clone, quantizedFrame.GetPixelSpan(), palette.Span, width, height);
+                    this.SecondPass(clone, pixelSpan, palette.Span, width, height);
                 }
             }
             else
             {
-                this.SecondPass(image, quantizedFrame.GetPixelSpan(), palette.Span, width, height);
+                this.SecondPass(image, pixelSpan, palette.Span, width, height);
             }
 
             return quantizedFrame;
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
index 4f134d98d7..21071dd8a0 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
                     ReadOnlySpan<byte> quantizedPixelSpan = quantized.GetPixelSpan();
 
                     ReadOnlySpan<TPixel> paletteSpan = quantized.Palette.Span;
-                    
+
                     int yy = y * source.Width;
 
                     for (int x = 0; x < source.Width; x++)
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
index ae5b5dda86..a4d06ac2e2 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <param name="width">The image width.</param>
         /// <param name="height">The image height.</param>
         /// <param name="palette">The color palette.</param>
-        public QuantizedFrame(MemoryAllocator memoryAllocator, int width, int height, ReadOnlyMemory<TPixel> palette)
+        internal QuantizedFrame(MemoryAllocator memoryAllocator, int width, int height, ReadOnlyMemory<TPixel> palette)
         {
             Guard.MustBeGreaterThan(width, 0, nameof(width));
             Guard.MustBeGreaterThan(height, 0, nameof(height));
@@ -58,7 +58,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// </summary>
         /// <returns>The <see cref="Span{T}"/></returns>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Span<byte> GetPixelSpan() => this.pixels.GetSpan();
+        public ReadOnlySpan<byte> GetPixelSpan() => this.pixels.GetSpan();
 
         /// <summary>
         /// Gets the representation of the pixels as a <see cref="Span{T}"/> of contiguous memory
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <param name="rowIndex">The row.</param>
         /// <returns>The <see cref="Span{T}"/></returns>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Span<byte> GetRowSpan(int rowIndex) => this.GetPixelSpan().Slice(rowIndex * this.Width, this.Width);
+        public ReadOnlySpan<byte> GetRowSpan(int rowIndex) => this.GetPixelSpan().Slice(rowIndex * this.Width, this.Width);
 
         /// <inheritdoc/>
         public void Dispose()
@@ -76,5 +76,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.pixels = null;
             this.Palette = null;
         }
+
+        /// <summary>
+        /// Get the non-readonly span of pixel data so <see cref="FrameQuantizer{TPixel}"/> can fill it.
+        /// </summary>
+        internal Span<byte> GetWritablePixelSpan() => this.pixels.GetSpan();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
index 95918f564a..2b1a24aee5 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WuFrameQuantizer{TPixel}.cs
@@ -120,33 +120,31 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <summary>
         /// Initializes a new instance of the <see cref="WuFrameQuantizer{TPixel}"/> class.
         /// </summary>
+        /// <param name="memoryAllocator">The <see cref="MemoryAllocator"/>.</param>
         /// <param name="quantizer">The wu quantizer</param>
         /// <remarks>
         /// The Wu quantizer is a two pass algorithm. The initial pass sets up the 3-D color histogram,
         /// the second pass quantizes a color based on the position in the histogram.
         /// </remarks>
-        public WuFrameQuantizer(WuQuantizer quantizer)
-            : this(quantizer, quantizer.MaxColors)
+        public WuFrameQuantizer(MemoryAllocator memoryAllocator, WuQuantizer quantizer)
+            : this(memoryAllocator, quantizer, quantizer.MaxColors)
         {
         }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="WuFrameQuantizer{TPixel}"/> class.
         /// </summary>
+        /// <param name="memoryAllocator">The <see cref="MemoryAllocator"/>.</param>
         /// <param name="quantizer">The wu quantizer.</param>
         /// <param name="maxColors">The maximum number of colors to hold in the color palette.</param>
         /// <remarks>
         /// The Wu quantizer is a two pass algorithm. The initial pass sets up the 3-D color histogram,
         /// the second pass quantizes a color based on the position in the histogram.
         /// </remarks>
-        public WuFrameQuantizer(WuQuantizer quantizer, int maxColors)
-            : base(quantizer, false) => this.colors = maxColors;
-
-        /// <inheritdoc/>
-        public override QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
+        public WuFrameQuantizer(MemoryAllocator memoryAllocator, WuQuantizer quantizer, int maxColors)
+            : base(quantizer, false)
         {
-            Guard.NotNull(image, nameof(image));
-            MemoryAllocator memoryAllocator = image.MemoryAllocator;
+            Guard.NotNull(memoryAllocator, nameof(memoryAllocator));
 
             this.vwt = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
             this.vmr = memoryAllocator.Allocate<long>(TableLength, AllocationOptions.Clean);
@@ -156,7 +154,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.m2 = memoryAllocator.Allocate<double>(TableLength, AllocationOptions.Clean);
             this.tag = memoryAllocator.Allocate<byte>(TableLength, AllocationOptions.Clean);
 
-            return base.QuantizeFrame(image);
+            this.colors = maxColors;
         }
 
         /// <inheritdoc/>
@@ -169,6 +167,14 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
             this.vma?.Dispose();
             this.m2?.Dispose();
             this.tag?.Dispose();
+
+            this.vwt = null;
+            this.vmr = null;
+            this.vmg = null;
+            this.vmb = null;
+            this.vma = null;
+            this.m2 = null;
+            this.tag = null;
         }
 
         internal ReadOnlyMemory<TPixel> AotGetPalette() => this.GetPalette();
diff --git a/src/ImageSharp/Processing/Processors/Quantization/WuQuantizer.cs b/src/ImageSharp/Processing/Processors/Quantization/WuQuantizer.cs
index eb8b0fec91..b80cedeb39 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/WuQuantizer.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/WuQuantizer.cs
@@ -72,14 +72,18 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <inheritdoc />
         public IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration)
             where TPixel : struct, IPixel<TPixel>
-            => new WuFrameQuantizer<TPixel>(this);
+        {
+            Guard.NotNull(configuration, nameof(configuration));
+            return new WuFrameQuantizer<TPixel>(configuration.MemoryAllocator, this);
+        }
 
         /// <inheritdoc/>
         public IFrameQuantizer<TPixel> CreateFrameQuantizer<TPixel>(Configuration configuration, int maxColors)
             where TPixel : struct, IPixel<TPixel>
         {
+            Guard.NotNull(configuration, nameof(configuration));
             maxColors = maxColors.Clamp(QuantizerConstants.MinColors, QuantizerConstants.MaxColors);
-            return new WuFrameQuantizer<TPixel>(this, maxColors);
+            return new WuFrameQuantizer<TPixel>(configuration.MemoryAllocator, this, maxColors);
         }
 
         private static IErrorDiffuser GetDiffuser(bool dither) => dither ? KnownDiffusers.FloydSteinberg : null;

From b177f62c8ab0194919110ad574f5255096ace40c Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 00:11:26 +0200
Subject: [PATCH 161/223] introduce IQuantizedFrame<T>

---
 src/ImageSharp/Formats/Gif/GifEncoderCore.cs  | 16 ++++----
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |  8 ++--
 .../Quantization/FrameQuantizer{TPixel}.cs    |  2 +-
 .../Quantization/IFrameQuantizer{TPixel}.cs   |  2 +-
 .../Quantization/IQuantizedFrame{TPixel}.cs   | 38 +++++++++++++++++++
 .../Quantization/QuantizeProcessor{TPixel}.cs |  4 +-
 .../Quantization/QuantizedFrameExtensions.cs  | 29 ++++++++++++++
 .../Quantization/QuantizedFrame{TPixel}.cs    | 12 +-----
 .../Quantization/QuantizedImageTests.cs       |  6 +--
 .../Quantization/WuQuantizerTests.cs          | 10 ++---
 10 files changed, 92 insertions(+), 35 deletions(-)
 create mode 100644 src/ImageSharp/Processing/Processors/Quantization/IQuantizedFrame{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/Processors/Quantization/QuantizedFrameExtensions.cs

diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
index ac97570941..36e27866e9 100644
--- a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
+++ b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -95,7 +95,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             bool useGlobalTable = this.colorTableMode == GifColorTableMode.Global;
 
             // Quantize the image returning a palette.
-            QuantizedFrame<TPixel> quantized = null;
+            IQuantizedFrame<TPixel> quantized = null;
             using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(image.GetConfiguration()))
             {
                 quantized = frameQuantizer.QuantizeFrame(image.Frames.RootFrame);
@@ -141,7 +141,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             stream.WriteByte(GifConstants.EndIntroducer);
         }
 
-        private void EncodeGlobal<TPixel>(Image<TPixel> image, QuantizedFrame<TPixel> quantized, int transparencyIndex, Stream stream)
+        private void EncodeGlobal<TPixel>(Image<TPixel> image, IQuantizedFrame<TPixel> quantized, int transparencyIndex, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
             for (int i = 0; i < image.Frames.Count; i++)
@@ -161,7 +161,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
                     using (IFrameQuantizer<TPixel> palleteFrameQuantizer =
                         new PaletteFrameQuantizer<TPixel>(this.quantizer.Diffuser, quantized.Palette))
                     {
-                        using (QuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
+                        using (IQuantizedFrame<TPixel> paletteQuantized = palleteFrameQuantizer.QuantizeFrame(frame))
                         {
                             this.WriteImageData(paletteQuantized, stream);
                         }
@@ -170,7 +170,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
             }
         }
 
-        private void EncodeLocal<TPixel>(Image<TPixel> image, QuantizedFrame<TPixel> quantized, Stream stream)
+        private void EncodeLocal<TPixel>(Image<TPixel> image, IQuantizedFrame<TPixel> quantized, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
             ImageFrame<TPixel> previousFrame = null;
@@ -222,7 +222,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <returns>
         /// The <see cref="int"/>.
         /// </returns>
-        private int GetTransparentIndex<TPixel>(QuantizedFrame<TPixel> quantized)
+        private int GetTransparentIndex<TPixel>(IQuantizedFrame<TPixel> quantized)
             where TPixel : struct, IPixel<TPixel>
         {
             // Transparent pixels are much more likely to be found at the end of a palette
@@ -425,7 +425,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="image">The <see cref="ImageFrame{TPixel}"/> to encode.</param>
         /// <param name="stream">The stream to write to.</param>
-        private void WriteColorTable<TPixel>(QuantizedFrame<TPixel> image, Stream stream)
+        private void WriteColorTable<TPixel>(IQuantizedFrame<TPixel> image, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
             // The maximum number of colors for the bit depth
@@ -447,9 +447,9 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// Writes the image pixel data to the stream.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="image">The <see cref="QuantizedFrame{TPixel}"/> containing indexed pixels.</param>
+        /// <param name="image">The <see cref="IQuantizedFrame{TPixel}"/> containing indexed pixels.</param>
         /// <param name="stream">The stream to write to.</param>
-        private void WriteImageData<TPixel>(QuantizedFrame<TPixel> image, Stream stream)
+        private void WriteImageData<TPixel>(IQuantizedFrame<TPixel> image, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
             using (var encoder = new LzwEncoder(this.memoryAllocator, (byte)this.bitDepth))
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 7bdced536b..cbc35f3c3e 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -227,7 +227,7 @@ namespace SixLabors.ImageSharp.Formats.Png
 
             stream.Write(PngConstants.HeaderBytes, 0, PngConstants.HeaderBytes.Length);
 
-            QuantizedFrame<TPixel> quantized = null;
+            IQuantizedFrame<TPixel> quantized = null;
             if (this.pngColorType == PngColorType.Palette)
             {
                 byte bits = (byte)this.pngBitDepth;
@@ -511,7 +511,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <param name="quantized">The quantized pixels. Can be null.</param>
         /// <param name="row">The row.</param>
         /// <returns>The <see cref="IManagedByteBuffer"/></returns>
-        private IManagedByteBuffer EncodePixelRow<TPixel>(ReadOnlySpan<TPixel> rowSpan, QuantizedFrame<TPixel> quantized, int row)
+        private IManagedByteBuffer EncodePixelRow<TPixel>(ReadOnlySpan<TPixel> rowSpan, IQuantizedFrame<TPixel> quantized, int row)
             where TPixel : struct, IPixel<TPixel>
         {
             switch (this.pngColorType)
@@ -662,7 +662,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="stream">The <see cref="Stream"/> containing image data.</param>
         /// <param name="quantized">The quantized frame.</param>
-        private void WritePaletteChunk<TPixel>(Stream stream, QuantizedFrame<TPixel> quantized)
+        private void WritePaletteChunk<TPixel>(Stream stream, IQuantizedFrame<TPixel> quantized)
             where TPixel : struct, IPixel<TPixel>
         {
             // Grab the palette and write it to the stream.
@@ -808,7 +808,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <param name="pixels">The image.</param>
         /// <param name="quantized">The quantized pixel data. Can be null.</param>
         /// <param name="stream">The stream.</param>
-        private void WriteDataChunks<TPixel>(ImageFrame<TPixel> pixels, QuantizedFrame<TPixel> quantized, Stream stream)
+        private void WriteDataChunks<TPixel>(ImageFrame<TPixel> pixels, IQuantizedFrame<TPixel> quantized, Stream stream)
             where TPixel : struct, IPixel<TPixel>
         {
             this.bytesPerScanline = this.CalculateScanlineLength(this.width);
diff --git a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
index d753b08a83..e6ffecc84d 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/FrameQuantizer{TPixel}.cs
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         }
 
         /// <inheritdoc/>
-        public QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
+        public IQuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image)
         {
             Guard.NotNull(image, nameof(image));
 
diff --git a/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
index f0b68b3a08..54dabab0ae 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/IFrameQuantizer{TPixel}.cs
@@ -31,6 +31,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <returns>
         /// A <see cref="QuantizedFrame{TPixel}"/> representing a quantized version of the image pixels.
         /// </returns>
-        QuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image);
+        IQuantizedFrame<TPixel> QuantizeFrame(ImageFrame<TPixel> image);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/IQuantizedFrame{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/IQuantizedFrame{TPixel}.cs
new file mode 100644
index 0000000000..42016459be
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Quantization/IQuantizedFrame{TPixel}.cs
@@ -0,0 +1,38 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Quantization
+{
+    /// <summary>
+    /// Defines an abstraction to represent a quantized image frame where the pixels indexed by a color palette.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    public interface IQuantizedFrame<TPixel> : IDisposable
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Gets the width of this <see cref="QuantizedFrame{TPixel}"/>.
+        /// </summary>
+        int Width { get; }
+
+        /// <summary>
+        /// Gets the height of this <see cref="QuantizedFrame{TPixel}"/>.
+        /// </summary>
+        int Height { get; }
+
+        /// <summary>
+        /// Gets the color palette of this <see cref="QuantizedFrame{TPixel}"/>.
+        /// </summary>
+        ReadOnlyMemory<TPixel> Palette { get; }
+
+        /// <summary>
+        /// Gets the pixels of this <see cref="QuantizedFrame{TPixel}"/>.
+        /// </summary>
+        /// <returns>The <see cref="Span{T}"/>The pixel span.</returns>
+        ReadOnlySpan<byte> GetPixelSpan();
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
index 21071dd8a0..5cb45e8d70 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizeProcessor{TPixel}.cs
@@ -31,8 +31,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         /// <inheritdoc />
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
-            using (IFrameQuantizer<TPixel> executor = this.quantizer.CreateFrameQuantizer<TPixel>(configuration))
-            using (QuantizedFrame<TPixel> quantized = executor.QuantizeFrame(source))
+            using (IFrameQuantizer<TPixel> frameQuantizer = this.quantizer.CreateFrameQuantizer<TPixel>(configuration))
+            using (IQuantizedFrame<TPixel> quantized = frameQuantizer.QuantizeFrame(source))
             {
                 int paletteCount = quantized.Palette.Length - 1;
 
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrameExtensions.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrameExtensions.cs
new file mode 100644
index 0000000000..fa3d36e10a
--- /dev/null
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrameExtensions.cs
@@ -0,0 +1,29 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Runtime.CompilerServices;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Quantization
+{
+    /// <summary>
+    /// Contains extension methods for <see cref="IQuantizedFrame{TPixel}"/>.
+    /// </summary>
+    public static class QuantizedFrameExtensions
+    {
+        /// <summary>
+        /// Gets the representation of the pixels as a <see cref="Span{T}"/> of contiguous memory
+        /// at row <paramref name="rowIndex"/> beginning from the the first pixel on that row.
+        /// </summary>
+        /// <param name="frame">The <see cref="IQuantizedFrame{TPixel}"/>.</param>
+        /// <param name="rowIndex">The row.</param>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
+        /// <returns>The pixel row as a <see cref="ReadOnlySpan{T}"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static ReadOnlySpan<byte> GetRowSpan<TPixel>(this IQuantizedFrame<TPixel> frame, int rowIndex)
+            where TPixel : struct, IPixel<TPixel>
+            => frame.GetPixelSpan().Slice(rowIndex * frame.Width, frame.Width);
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
index a4d06ac2e2..cbea82c1f3 100644
--- a/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Quantization/QuantizedFrame{TPixel}.cs
@@ -8,14 +8,13 @@ using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 
-// TODO: Consider pooling the TPixel palette also. For Rgba48+ this would end up on th LOH if 256 colors.
 namespace SixLabors.ImageSharp.Processing.Processors.Quantization
 {
     /// <summary>
     /// Represents a quantized image frame where the pixels indexed by a color palette.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class QuantizedFrame<TPixel> : IDisposable
+    public class QuantizedFrame<TPixel> : IQuantizedFrame<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private IMemoryOwner<byte> pixels;
@@ -60,15 +59,6 @@ namespace SixLabors.ImageSharp.Processing.Processors.Quantization
         [MethodImpl(InliningOptions.ShortMethod)]
         public ReadOnlySpan<byte> GetPixelSpan() => this.pixels.GetSpan();
 
-        /// <summary>
-        /// Gets the representation of the pixels as a <see cref="Span{T}"/> of contiguous memory
-        /// at row <paramref name="rowIndex"/> beginning from the the first pixel on that row.
-        /// </summary>
-        /// <param name="rowIndex">The row.</param>
-        /// <returns>The <see cref="Span{T}"/></returns>
-        [MethodImpl(InliningOptions.ShortMethod)]
-        public ReadOnlySpan<byte> GetRowSpan(int rowIndex) => this.GetPixelSpan().Slice(rowIndex * this.Width, this.Width);
-
         /// <inheritdoc/>
         public void Dispose()
         {
diff --git a/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs b/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
index b0de058f80..04e9803af4 100644
--- a/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
+++ b/tests/ImageSharp.Tests/Quantization/QuantizedImageTests.cs
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Tests
 
                 foreach (ImageFrame<TPixel> frame in image.Frames)
                 {
-                    QuantizedFrame<TPixel> quantized =
+                    IQuantizedFrame<TPixel> quantized =
                         quantizer.CreateFrameQuantizer<TPixel>(this.Configuration).QuantizeFrame(frame);
 
                     int index = this.GetTransparentIndex(quantized);
@@ -72,7 +72,7 @@ namespace SixLabors.ImageSharp.Tests
 
                 foreach (ImageFrame<TPixel> frame in image.Frames)
                 {
-                    QuantizedFrame<TPixel> quantized =
+                    IQuantizedFrame<TPixel> quantized =
                         quantizer.CreateFrameQuantizer<TPixel>(this.Configuration).QuantizeFrame(frame);
 
                     int index = this.GetTransparentIndex(quantized);
@@ -81,7 +81,7 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
-        private int GetTransparentIndex<TPixel>(QuantizedFrame<TPixel> quantized)
+        private int GetTransparentIndex<TPixel>(IQuantizedFrame<TPixel> quantized)
             where TPixel : struct, IPixel<TPixel>
         {
             // Transparent pixels are much more likely to be found at the end of a palette
diff --git a/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
index 716273699e..a1de7fd4b9 100644
--- a/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
+++ b/tests/ImageSharp.Tests/Quantization/WuQuantizerTests.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
             var quantizer = new WuQuantizer(false);
 
             using (var image = new Image<Rgba32>(config, 1, 1, Rgba32.Black))
-            using (QuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
+            using (IQuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
             {
                 Assert.Equal(1, result.Palette.Length);
                 Assert.Equal(1, result.GetPixelSpan().Length);
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
             var quantizer = new WuQuantizer(false);
 
             using (var image = new Image<Rgba32>(config, 1, 1, default(Rgba32)))
-            using (QuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
+            using (IQuantizedFrame<Rgba32> result = quantizer.CreateFrameQuantizer<Rgba32>(config).QuantizeFrame(image.Frames[0]))
             {
                 Assert.Equal(1, result.Palette.Length);
                 Assert.Equal(1, result.GetPixelSpan().Length);
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                 Configuration config = Configuration.Default;
                 var quantizer = new WuQuantizer(false);
                 using (IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(config))
-                using (QuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                using (IQuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
                 {
                     Assert.Equal(256, result.Palette.Length);
                     Assert.Equal(256, result.GetPixelSpan().Length);
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                 Configuration config = Configuration.Default;
                 var quantizer = new WuQuantizer(false);
                 using (IFrameQuantizer<TPixel> frameQuantizer = quantizer.CreateFrameQuantizer<TPixel>(config))
-                using (QuantizedFrame<TPixel> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                using (IQuantizedFrame<TPixel> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
                 {
                     Assert.Equal(48, result.Palette.Length);
                 }
@@ -142,7 +142,7 @@ namespace SixLabors.ImageSharp.Tests.Quantization
                 var quantizer = new WuQuantizer(false);
 
                 using (IFrameQuantizer<Rgba32> frameQuantizer = quantizer.CreateFrameQuantizer<Rgba32>(config))
-                using (QuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
+                using (IQuantizedFrame<Rgba32> result = frameQuantizer.QuantizeFrame(image.Frames[0]))
                 {
                     Assert.Equal(4 * 8, result.Palette.Length);
                     Assert.Equal(256, result.GetPixelSpan().Length);

From 2cfdc9fb6ec64c9d9db9298e51587e1e40f82265 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 00:33:00 +0200
Subject: [PATCH 162/223] move all extension methods under a subfolder

(non-namespace providing)
---
 src/ImageSharp/ImageSharp.csproj.DotSettings                    | 1 +
 .../Processing/{ => Extensions}/AutoOrientExtensions.cs         | 0
 .../Processing/{ => Extensions}/BackgroundColorExtensions.cs    | 0
 .../Processing/{ => Extensions}/BinaryDiffuseExtensions.cs      | 0
 .../Processing/{ => Extensions}/BinaryDitherExtensions.cs       | 0
 .../Processing/{ => Extensions}/BinaryThresholdExtensions.cs    | 0
 .../Processing/{ => Extensions}/BlackWhiteExtensions.cs         | 0
 src/ImageSharp/Processing/{ => Extensions}/BoxBlurExtensions.cs | 0
 .../Processing/{ => Extensions}/BrightnessExtensions.cs         | 0
 .../Processing/{ => Extensions}/ColorBlindnessExtensions.cs     | 0
 .../Processing/{ => Extensions}/ContrastExtensions.cs           | 0
 src/ImageSharp/Processing/{ => Extensions}/CropExtensions.cs    | 0
 .../Processing/{ => Extensions}/DetectEdgesExtensions.cs        | 0
 src/ImageSharp/Processing/{ => Extensions}/DiffuseExtensions.cs | 0
 src/ImageSharp/Processing/{ => Extensions}/DitherExtensions.cs  | 0
 .../Processing/{ => Extensions}/EntropyCropExtensions.cs        | 0
 src/ImageSharp/Processing/{ => Extensions}/FilterExtensions.cs  | 0
 src/ImageSharp/Processing/{ => Extensions}/FlipExtensions.cs    | 0
 .../Processing/{ => Extensions}/GaussianBlurExtensions.cs       | 0
 .../Processing/{ => Extensions}/GaussianSharpenExtensions.cs    | 0
 src/ImageSharp/Processing/{ => Extensions}/GlowExtensions.cs    | 0
 .../Processing/{ => Extensions}/GrayscaleExtensions.cs          | 0
 .../HistogramEqualizationExtensions.cs}                         | 2 +-
 src/ImageSharp/Processing/{ => Extensions}/HueExtensions.cs     | 0
 src/ImageSharp/Processing/{ => Extensions}/InvertExtensions.cs  | 0
 .../Processing/{ => Extensions}/KodachromeExtensions.cs         | 0
 .../Processing/{ => Extensions}/LomographExtensions.cs          | 0
 .../Processing/{ => Extensions}/OilPaintExtensions.cs           | 0
 src/ImageSharp/Processing/{ => Extensions}/OpacityExtensions.cs | 0
 src/ImageSharp/Processing/{ => Extensions}/PadExtensions.cs     | 0
 .../Processing/{ => Extensions}/PixelateExtensions.cs           | 0
 .../Processing/{ => Extensions}/PolaroidExtensions.cs           | 0
 .../Processing/{ => Extensions}/ProcessingExtensions.cs         | 0
 .../Processing/{ => Extensions}/QuantizeExtensions.cs           | 0
 src/ImageSharp/Processing/{ => Extensions}/ResizeExtensions.cs  | 0
 src/ImageSharp/Processing/{ => Extensions}/RotateExtensions.cs  | 0
 .../Processing/{ => Extensions}/RotateFlipExtensions.cs         | 0
 .../Processing/{ => Extensions}/SaturateExtensions.cs           | 0
 src/ImageSharp/Processing/{ => Extensions}/SepiaExtensions.cs   | 0
 src/ImageSharp/Processing/{ => Extensions}/SkewExtensions.cs    | 0
 .../Processing/{ => Extensions}/TransformExtensions.cs          | 0
 .../Processing/{ => Extensions}/VignetteExtensions.cs           | 0
 42 files changed, 2 insertions(+), 1 deletion(-)
 rename src/ImageSharp/Processing/{ => Extensions}/AutoOrientExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BackgroundColorExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BinaryDiffuseExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BinaryDitherExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BinaryThresholdExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BlackWhiteExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BoxBlurExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/BrightnessExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/ColorBlindnessExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/ContrastExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/CropExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/DetectEdgesExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/DiffuseExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/DitherExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/EntropyCropExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/FilterExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/FlipExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/GaussianBlurExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/GaussianSharpenExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/GlowExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/GrayscaleExtensions.cs (100%)
 rename src/ImageSharp/Processing/{HistogramEqualizationExtension.cs => Extensions/HistogramEqualizationExtensions.cs} (96%)
 rename src/ImageSharp/Processing/{ => Extensions}/HueExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/InvertExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/KodachromeExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/LomographExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/OilPaintExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/OpacityExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/PadExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/PixelateExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/PolaroidExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/ProcessingExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/QuantizeExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/ResizeExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/RotateExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/RotateFlipExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/SaturateExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/SepiaExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/SkewExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/TransformExtensions.cs (100%)
 rename src/ImageSharp/Processing/{ => Extensions}/VignetteExtensions.cs (100%)

diff --git a/src/ImageSharp/ImageSharp.csproj.DotSettings b/src/ImageSharp/ImageSharp.csproj.DotSettings
index e43e92ddce..018ca75cdf 100644
--- a/src/ImageSharp/ImageSharp.csproj.DotSettings
+++ b/src/ImageSharp/ImageSharp.csproj.DotSettings
@@ -7,6 +7,7 @@
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cpixelimplementations/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cpixeltypes/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=pixelformats_005Cutils/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cextensions/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Cconvolution_005Ckernels/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Ctransforms_005Cresamplers/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cprocessors_005Ctransforms_005Cresize/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/AutoOrientExtensions.cs b/src/ImageSharp/Processing/Extensions/AutoOrientExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/AutoOrientExtensions.cs
rename to src/ImageSharp/Processing/Extensions/AutoOrientExtensions.cs
diff --git a/src/ImageSharp/Processing/BackgroundColorExtensions.cs b/src/ImageSharp/Processing/Extensions/BackgroundColorExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BackgroundColorExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BackgroundColorExtensions.cs
diff --git a/src/ImageSharp/Processing/BinaryDiffuseExtensions.cs b/src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BinaryDiffuseExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs
diff --git a/src/ImageSharp/Processing/BinaryDitherExtensions.cs b/src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BinaryDitherExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs
diff --git a/src/ImageSharp/Processing/BinaryThresholdExtensions.cs b/src/ImageSharp/Processing/Extensions/BinaryThresholdExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BinaryThresholdExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BinaryThresholdExtensions.cs
diff --git a/src/ImageSharp/Processing/BlackWhiteExtensions.cs b/src/ImageSharp/Processing/Extensions/BlackWhiteExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BlackWhiteExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BlackWhiteExtensions.cs
diff --git a/src/ImageSharp/Processing/BoxBlurExtensions.cs b/src/ImageSharp/Processing/Extensions/BoxBlurExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BoxBlurExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BoxBlurExtensions.cs
diff --git a/src/ImageSharp/Processing/BrightnessExtensions.cs b/src/ImageSharp/Processing/Extensions/BrightnessExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/BrightnessExtensions.cs
rename to src/ImageSharp/Processing/Extensions/BrightnessExtensions.cs
diff --git a/src/ImageSharp/Processing/ColorBlindnessExtensions.cs b/src/ImageSharp/Processing/Extensions/ColorBlindnessExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/ColorBlindnessExtensions.cs
rename to src/ImageSharp/Processing/Extensions/ColorBlindnessExtensions.cs
diff --git a/src/ImageSharp/Processing/ContrastExtensions.cs b/src/ImageSharp/Processing/Extensions/ContrastExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/ContrastExtensions.cs
rename to src/ImageSharp/Processing/Extensions/ContrastExtensions.cs
diff --git a/src/ImageSharp/Processing/CropExtensions.cs b/src/ImageSharp/Processing/Extensions/CropExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/CropExtensions.cs
rename to src/ImageSharp/Processing/Extensions/CropExtensions.cs
diff --git a/src/ImageSharp/Processing/DetectEdgesExtensions.cs b/src/ImageSharp/Processing/Extensions/DetectEdgesExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/DetectEdgesExtensions.cs
rename to src/ImageSharp/Processing/Extensions/DetectEdgesExtensions.cs
diff --git a/src/ImageSharp/Processing/DiffuseExtensions.cs b/src/ImageSharp/Processing/Extensions/DiffuseExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/DiffuseExtensions.cs
rename to src/ImageSharp/Processing/Extensions/DiffuseExtensions.cs
diff --git a/src/ImageSharp/Processing/DitherExtensions.cs b/src/ImageSharp/Processing/Extensions/DitherExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/DitherExtensions.cs
rename to src/ImageSharp/Processing/Extensions/DitherExtensions.cs
diff --git a/src/ImageSharp/Processing/EntropyCropExtensions.cs b/src/ImageSharp/Processing/Extensions/EntropyCropExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/EntropyCropExtensions.cs
rename to src/ImageSharp/Processing/Extensions/EntropyCropExtensions.cs
diff --git a/src/ImageSharp/Processing/FilterExtensions.cs b/src/ImageSharp/Processing/Extensions/FilterExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/FilterExtensions.cs
rename to src/ImageSharp/Processing/Extensions/FilterExtensions.cs
diff --git a/src/ImageSharp/Processing/FlipExtensions.cs b/src/ImageSharp/Processing/Extensions/FlipExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/FlipExtensions.cs
rename to src/ImageSharp/Processing/Extensions/FlipExtensions.cs
diff --git a/src/ImageSharp/Processing/GaussianBlurExtensions.cs b/src/ImageSharp/Processing/Extensions/GaussianBlurExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/GaussianBlurExtensions.cs
rename to src/ImageSharp/Processing/Extensions/GaussianBlurExtensions.cs
diff --git a/src/ImageSharp/Processing/GaussianSharpenExtensions.cs b/src/ImageSharp/Processing/Extensions/GaussianSharpenExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/GaussianSharpenExtensions.cs
rename to src/ImageSharp/Processing/Extensions/GaussianSharpenExtensions.cs
diff --git a/src/ImageSharp/Processing/GlowExtensions.cs b/src/ImageSharp/Processing/Extensions/GlowExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/GlowExtensions.cs
rename to src/ImageSharp/Processing/Extensions/GlowExtensions.cs
diff --git a/src/ImageSharp/Processing/GrayscaleExtensions.cs b/src/ImageSharp/Processing/Extensions/GrayscaleExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/GrayscaleExtensions.cs
rename to src/ImageSharp/Processing/Extensions/GrayscaleExtensions.cs
diff --git a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs b/src/ImageSharp/Processing/Extensions/HistogramEqualizationExtensions.cs
similarity index 96%
rename from src/ImageSharp/Processing/HistogramEqualizationExtension.cs
rename to src/ImageSharp/Processing/Extensions/HistogramEqualizationExtensions.cs
index 01c14fc093..72962a3f9f 100644
--- a/src/ImageSharp/Processing/HistogramEqualizationExtension.cs
+++ b/src/ImageSharp/Processing/Extensions/HistogramEqualizationExtensions.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Defines extension that allow the adjustment of the contrast of an image via its histogram.
     /// </summary>
-    public static class HistogramEqualizationExtension
+    public static class HistogramEqualizationExtensions
     {
         /// <summary>
         /// Equalizes the histogram of an image to increases the contrast.
diff --git a/src/ImageSharp/Processing/HueExtensions.cs b/src/ImageSharp/Processing/Extensions/HueExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/HueExtensions.cs
rename to src/ImageSharp/Processing/Extensions/HueExtensions.cs
diff --git a/src/ImageSharp/Processing/InvertExtensions.cs b/src/ImageSharp/Processing/Extensions/InvertExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/InvertExtensions.cs
rename to src/ImageSharp/Processing/Extensions/InvertExtensions.cs
diff --git a/src/ImageSharp/Processing/KodachromeExtensions.cs b/src/ImageSharp/Processing/Extensions/KodachromeExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/KodachromeExtensions.cs
rename to src/ImageSharp/Processing/Extensions/KodachromeExtensions.cs
diff --git a/src/ImageSharp/Processing/LomographExtensions.cs b/src/ImageSharp/Processing/Extensions/LomographExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/LomographExtensions.cs
rename to src/ImageSharp/Processing/Extensions/LomographExtensions.cs
diff --git a/src/ImageSharp/Processing/OilPaintExtensions.cs b/src/ImageSharp/Processing/Extensions/OilPaintExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/OilPaintExtensions.cs
rename to src/ImageSharp/Processing/Extensions/OilPaintExtensions.cs
diff --git a/src/ImageSharp/Processing/OpacityExtensions.cs b/src/ImageSharp/Processing/Extensions/OpacityExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/OpacityExtensions.cs
rename to src/ImageSharp/Processing/Extensions/OpacityExtensions.cs
diff --git a/src/ImageSharp/Processing/PadExtensions.cs b/src/ImageSharp/Processing/Extensions/PadExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/PadExtensions.cs
rename to src/ImageSharp/Processing/Extensions/PadExtensions.cs
diff --git a/src/ImageSharp/Processing/PixelateExtensions.cs b/src/ImageSharp/Processing/Extensions/PixelateExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/PixelateExtensions.cs
rename to src/ImageSharp/Processing/Extensions/PixelateExtensions.cs
diff --git a/src/ImageSharp/Processing/PolaroidExtensions.cs b/src/ImageSharp/Processing/Extensions/PolaroidExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/PolaroidExtensions.cs
rename to src/ImageSharp/Processing/Extensions/PolaroidExtensions.cs
diff --git a/src/ImageSharp/Processing/ProcessingExtensions.cs b/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/ProcessingExtensions.cs
rename to src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
diff --git a/src/ImageSharp/Processing/QuantizeExtensions.cs b/src/ImageSharp/Processing/Extensions/QuantizeExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/QuantizeExtensions.cs
rename to src/ImageSharp/Processing/Extensions/QuantizeExtensions.cs
diff --git a/src/ImageSharp/Processing/ResizeExtensions.cs b/src/ImageSharp/Processing/Extensions/ResizeExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/ResizeExtensions.cs
rename to src/ImageSharp/Processing/Extensions/ResizeExtensions.cs
diff --git a/src/ImageSharp/Processing/RotateExtensions.cs b/src/ImageSharp/Processing/Extensions/RotateExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/RotateExtensions.cs
rename to src/ImageSharp/Processing/Extensions/RotateExtensions.cs
diff --git a/src/ImageSharp/Processing/RotateFlipExtensions.cs b/src/ImageSharp/Processing/Extensions/RotateFlipExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/RotateFlipExtensions.cs
rename to src/ImageSharp/Processing/Extensions/RotateFlipExtensions.cs
diff --git a/src/ImageSharp/Processing/SaturateExtensions.cs b/src/ImageSharp/Processing/Extensions/SaturateExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/SaturateExtensions.cs
rename to src/ImageSharp/Processing/Extensions/SaturateExtensions.cs
diff --git a/src/ImageSharp/Processing/SepiaExtensions.cs b/src/ImageSharp/Processing/Extensions/SepiaExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/SepiaExtensions.cs
rename to src/ImageSharp/Processing/Extensions/SepiaExtensions.cs
diff --git a/src/ImageSharp/Processing/SkewExtensions.cs b/src/ImageSharp/Processing/Extensions/SkewExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/SkewExtensions.cs
rename to src/ImageSharp/Processing/Extensions/SkewExtensions.cs
diff --git a/src/ImageSharp/Processing/TransformExtensions.cs b/src/ImageSharp/Processing/Extensions/TransformExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/TransformExtensions.cs
rename to src/ImageSharp/Processing/Extensions/TransformExtensions.cs
diff --git a/src/ImageSharp/Processing/VignetteExtensions.cs b/src/ImageSharp/Processing/Extensions/VignetteExtensions.cs
similarity index 100%
rename from src/ImageSharp/Processing/VignetteExtensions.cs
rename to src/ImageSharp/Processing/Extensions/VignetteExtensions.cs

From 706211d144232ecf4c94aa2a2140ce3eb6c7b6e0 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 13:45:26 +0200
Subject: [PATCH 163/223] re-enable all target frameworks

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj | 3 +--
 src/ImageSharp/ImageSharp.csproj                 | 3 +--
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj   | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index fdeb27a770..915915f6cc 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -11,8 +11,7 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 4abe2f57a2..d734648f41 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -11,8 +11,7 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index efdf89964c..0b727f30ce 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From 8618a05f44f1a54a72b3ac2b81f9a5cd94066201 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 11 May 2019 13:52:18 +0200
Subject: [PATCH 164/223] Using tolerant comparer for the Bit8Gs image

---
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  |  3 +-
 .../Formats/Bmp/BmpEncoderTests.cs            | 37 ++++++++++++++++---
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 9d9c7b624a..0cbc4fca1b 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -1022,7 +1022,8 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.bmpMetadata.InfoHeaderType = infoHeaderType;
 
             // We can only encode at these bit rates so far.
-            if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel16)
+            if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel8)
+                || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel16)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel32))
             {
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index f3d6e0fa8e..1d489e69dc 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -3,12 +3,11 @@
 
 using System.IO;
 
-using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
 using Xunit;
 using Xunit.Abstractions;
@@ -128,11 +127,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [Theory]
         // WinBmpv3 is a 24 bits per pixel image
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        [WithFile(F, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
         public void Encode_24Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
 
         [Theory]
         [WithFile(WinBmpv3, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
+        [WithFile(F, PixelTypes.Rgb24, BmpBitsPerPixel.Pixel24)]
         public void Encode_24Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
@@ -150,24 +151,48 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
         [Theory]
+        [WithFile(WinBmpv5, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
         [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
-        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_8Bit_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: false);
 
         [Theory]
+        [WithFile(WinBmpv5, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
         [WithFile(Bit8Palette4, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel8)]
-        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
         public void Encode_8Bit_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
+        [Theory]
+        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
+        public void Encode_8BitGray_WithV3Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> =>
+            TestBmpEncoderCore(
+                provider,
+                bitsPerPixel,
+                supportTransparency: false,
+                ImageComparer.TolerantPercentage(0.01f));
+
+        [Theory]
+        [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
+        public void Encode_8BitGray_WithV4Header_Works<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
+            where TPixel : struct, IPixel<TPixel> =>
+            TestBmpEncoderCore(
+                provider,
+                bitsPerPixel,
+                supportTransparency: true,
+                ImageComparer.TolerantPercentage(0.01f));
+
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         [WithFile(Bit32Rgba, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         public void Encode_PreservesAlpha<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel)
             where TPixel : struct, IPixel<TPixel> => TestBmpEncoderCore(provider, bitsPerPixel, supportTransparency: true);
 
-        private static void TestBmpEncoderCore<TPixel>(TestImageProvider<TPixel> provider, BmpBitsPerPixel bitsPerPixel, bool supportTransparency = true)
+        private static void TestBmpEncoderCore<TPixel>(
+            TestImageProvider<TPixel> provider,
+            BmpBitsPerPixel bitsPerPixel,
+            bool supportTransparency = true,
+            ImageComparer customComparer = null)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
@@ -181,7 +206,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 var encoder = new BmpEncoder { BitsPerPixel = bitsPerPixel, SupportTransparency = supportTransparency };
 
                 // Does DebugSave & load reference CompareToReferenceInput():
-                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder);
+                image.VerifyEncoder(provider, "bmp", bitsPerPixel, encoder, customComparer);
             }
         }
     }

From 8425cae737ed8b9f29f8efc3ee94ada159fe5920 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 13:57:21 +0200
Subject: [PATCH 165/223] More docs for Color, correct naming in
 ColorBuilder<TPixel>

---
 src/ImageSharp/Color/Color.cs                 |   8 +-
 .../PixelFormats/ColorBuilder{TPixel}.cs      |   4 +-
 .../PixelFormats/NamedColors{TPixel}.cs       | 284 +++++++++---------
 3 files changed, 151 insertions(+), 145 deletions(-)

diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index 94b5dde2ee..f2f8578d83 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -12,8 +12,14 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Represents a color value that is convertible to all <see cref="IPixel{TSelf}"/> implementations.
+    /// Represents a color value that is convertible to any <see cref="IPixel{TSelf}"/> type.
     /// </summary>
+    /// <remarks>
+    /// The internal representation and layout of this structure is hidden by intention.
+    /// It's not serializable, and it should not be considered as part of a contract.
+    /// Unlike System.Drawing.Color, <see cref="Color"/> has to be converted to a specific pixel value
+    /// to query the color components.
+    /// </remarks>
     public readonly partial struct Color : IEquatable<Color>
     {
         private readonly Rgba64 data;
diff --git a/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs b/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
index 2572b32933..c1fb13e4da 100644
--- a/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="green">The green intensity.</param>
         /// <param name="blue">The blue intensity.</param>
         /// <returns>Returns a <typeparamref name="TPixel"/> that represents the color defined by the provided RGB values with 100% opacity.</returns>
-        public static TPixel FromRGB(byte red, byte green, byte blue) => FromRGBA(red, green, blue, 255);
+        public static TPixel FromRgb(byte red, byte green, byte blue) => FromRgba(red, green, blue, 255);
 
         /// <summary>
         /// Creates a new <typeparamref name="TPixel"/> representation from standard RGBA bytes.
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="blue">The blue intensity.</param>
         /// <param name="alpha">The alpha intensity.</param>
         /// <returns>Returns a <typeparamref name="TPixel"/> that represents the color defined by the provided RGBA values.</returns>
-        public static TPixel FromRGBA(byte red, byte green, byte blue, byte alpha)
+        public static TPixel FromRgba(byte red, byte green, byte blue, byte alpha)
         {
             TPixel color = default;
             color.FromRgba32(new Rgba32(red, green, blue, alpha));
diff --git a/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs b/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
index 7e093de042..2138e2e2f7 100644
--- a/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
@@ -22,712 +22,712 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0F8FF.
         /// </summary>
-        public static readonly TPixel AliceBlue = ColorBuilder<TPixel>.FromRGBA(240, 248, 255, 255);
+        public static readonly TPixel AliceBlue = ColorBuilder<TPixel>.FromRgba(240, 248, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAEBD7.
         /// </summary>
-        public static readonly TPixel AntiqueWhite = ColorBuilder<TPixel>.FromRGBA(250, 235, 215, 255);
+        public static readonly TPixel AntiqueWhite = ColorBuilder<TPixel>.FromRgba(250, 235, 215, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FFFF.
         /// </summary>
-        public static readonly TPixel Aqua = ColorBuilder<TPixel>.FromRGBA(0, 255, 255, 255);
+        public static readonly TPixel Aqua = ColorBuilder<TPixel>.FromRgba(0, 255, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7FFFD4.
         /// </summary>
-        public static readonly TPixel Aquamarine = ColorBuilder<TPixel>.FromRGBA(127, 255, 212, 255);
+        public static readonly TPixel Aquamarine = ColorBuilder<TPixel>.FromRgba(127, 255, 212, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0FFFF.
         /// </summary>
-        public static readonly TPixel Azure = ColorBuilder<TPixel>.FromRGBA(240, 255, 255, 255);
+        public static readonly TPixel Azure = ColorBuilder<TPixel>.FromRgba(240, 255, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5F5DC.
         /// </summary>
-        public static readonly TPixel Beige = ColorBuilder<TPixel>.FromRGBA(245, 245, 220, 255);
+        public static readonly TPixel Beige = ColorBuilder<TPixel>.FromRgba(245, 245, 220, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4C4.
         /// </summary>
-        public static readonly TPixel Bisque = ColorBuilder<TPixel>.FromRGBA(255, 228, 196, 255);
+        public static readonly TPixel Bisque = ColorBuilder<TPixel>.FromRgba(255, 228, 196, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #000000.
         /// </summary>
-        public static readonly TPixel Black = ColorBuilder<TPixel>.FromRGBA(0, 0, 0, 255);
+        public static readonly TPixel Black = ColorBuilder<TPixel>.FromRgba(0, 0, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFEBCD.
         /// </summary>
-        public static readonly TPixel BlanchedAlmond = ColorBuilder<TPixel>.FromRGBA(255, 235, 205, 255);
+        public static readonly TPixel BlanchedAlmond = ColorBuilder<TPixel>.FromRgba(255, 235, 205, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #0000FF.
         /// </summary>
-        public static readonly TPixel Blue = ColorBuilder<TPixel>.FromRGBA(0, 0, 255, 255);
+        public static readonly TPixel Blue = ColorBuilder<TPixel>.FromRgba(0, 0, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8A2BE2.
         /// </summary>
-        public static readonly TPixel BlueViolet = ColorBuilder<TPixel>.FromRGBA(138, 43, 226, 255);
+        public static readonly TPixel BlueViolet = ColorBuilder<TPixel>.FromRgba(138, 43, 226, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A52A2A.
         /// </summary>
-        public static readonly TPixel Brown = ColorBuilder<TPixel>.FromRGBA(165, 42, 42, 255);
+        public static readonly TPixel Brown = ColorBuilder<TPixel>.FromRgba(165, 42, 42, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DEB887.
         /// </summary>
-        public static readonly TPixel BurlyWood = ColorBuilder<TPixel>.FromRGBA(222, 184, 135, 255);
+        public static readonly TPixel BurlyWood = ColorBuilder<TPixel>.FromRgba(222, 184, 135, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #5F9EA0.
         /// </summary>
-        public static readonly TPixel CadetBlue = ColorBuilder<TPixel>.FromRGBA(95, 158, 160, 255);
+        public static readonly TPixel CadetBlue = ColorBuilder<TPixel>.FromRgba(95, 158, 160, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7FFF00.
         /// </summary>
-        public static readonly TPixel Chartreuse = ColorBuilder<TPixel>.FromRGBA(127, 255, 0, 255);
+        public static readonly TPixel Chartreuse = ColorBuilder<TPixel>.FromRgba(127, 255, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D2691E.
         /// </summary>
-        public static readonly TPixel Chocolate = ColorBuilder<TPixel>.FromRGBA(210, 105, 30, 255);
+        public static readonly TPixel Chocolate = ColorBuilder<TPixel>.FromRgba(210, 105, 30, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF7F50.
         /// </summary>
-        public static readonly TPixel Coral = ColorBuilder<TPixel>.FromRGBA(255, 127, 80, 255);
+        public static readonly TPixel Coral = ColorBuilder<TPixel>.FromRgba(255, 127, 80, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6495ED.
         /// </summary>
-        public static readonly TPixel CornflowerBlue = ColorBuilder<TPixel>.FromRGBA(100, 149, 237, 255);
+        public static readonly TPixel CornflowerBlue = ColorBuilder<TPixel>.FromRgba(100, 149, 237, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF8DC.
         /// </summary>
-        public static readonly TPixel Cornsilk = ColorBuilder<TPixel>.FromRGBA(255, 248, 220, 255);
+        public static readonly TPixel Cornsilk = ColorBuilder<TPixel>.FromRgba(255, 248, 220, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DC143C.
         /// </summary>
-        public static readonly TPixel Crimson = ColorBuilder<TPixel>.FromRGBA(220, 20, 60, 255);
+        public static readonly TPixel Crimson = ColorBuilder<TPixel>.FromRgba(220, 20, 60, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FFFF.
         /// </summary>
-        public static readonly TPixel Cyan = ColorBuilder<TPixel>.FromRGBA(0, 255, 255, 255);
+        public static readonly TPixel Cyan = ColorBuilder<TPixel>.FromRgba(0, 255, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00008B.
         /// </summary>
-        public static readonly TPixel DarkBlue = ColorBuilder<TPixel>.FromRGBA(0, 0, 139, 255);
+        public static readonly TPixel DarkBlue = ColorBuilder<TPixel>.FromRgba(0, 0, 139, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008B8B.
         /// </summary>
-        public static readonly TPixel DarkCyan = ColorBuilder<TPixel>.FromRGBA(0, 139, 139, 255);
+        public static readonly TPixel DarkCyan = ColorBuilder<TPixel>.FromRgba(0, 139, 139, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B8860B.
         /// </summary>
-        public static readonly TPixel DarkGoldenrod = ColorBuilder<TPixel>.FromRGBA(184, 134, 11, 255);
+        public static readonly TPixel DarkGoldenrod = ColorBuilder<TPixel>.FromRgba(184, 134, 11, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A9A9A9.
         /// </summary>
-        public static readonly TPixel DarkGray = ColorBuilder<TPixel>.FromRGBA(169, 169, 169, 255);
+        public static readonly TPixel DarkGray = ColorBuilder<TPixel>.FromRgba(169, 169, 169, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #006400.
         /// </summary>
-        public static readonly TPixel DarkGreen = ColorBuilder<TPixel>.FromRGBA(0, 100, 0, 255);
+        public static readonly TPixel DarkGreen = ColorBuilder<TPixel>.FromRgba(0, 100, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BDB76B.
         /// </summary>
-        public static readonly TPixel DarkKhaki = ColorBuilder<TPixel>.FromRGBA(189, 183, 107, 255);
+        public static readonly TPixel DarkKhaki = ColorBuilder<TPixel>.FromRgba(189, 183, 107, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B008B.
         /// </summary>
-        public static readonly TPixel DarkMagenta = ColorBuilder<TPixel>.FromRGBA(139, 0, 139, 255);
+        public static readonly TPixel DarkMagenta = ColorBuilder<TPixel>.FromRgba(139, 0, 139, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #556B2F.
         /// </summary>
-        public static readonly TPixel DarkOliveGreen = ColorBuilder<TPixel>.FromRGBA(85, 107, 47, 255);
+        public static readonly TPixel DarkOliveGreen = ColorBuilder<TPixel>.FromRgba(85, 107, 47, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF8C00.
         /// </summary>
-        public static readonly TPixel DarkOrange = ColorBuilder<TPixel>.FromRGBA(255, 140, 0, 255);
+        public static readonly TPixel DarkOrange = ColorBuilder<TPixel>.FromRgba(255, 140, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9932CC.
         /// </summary>
-        public static readonly TPixel DarkOrchid = ColorBuilder<TPixel>.FromRGBA(153, 50, 204, 255);
+        public static readonly TPixel DarkOrchid = ColorBuilder<TPixel>.FromRgba(153, 50, 204, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B0000.
         /// </summary>
-        public static readonly TPixel DarkRed = ColorBuilder<TPixel>.FromRGBA(139, 0, 0, 255);
+        public static readonly TPixel DarkRed = ColorBuilder<TPixel>.FromRgba(139, 0, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E9967A.
         /// </summary>
-        public static readonly TPixel DarkSalmon = ColorBuilder<TPixel>.FromRGBA(233, 150, 122, 255);
+        public static readonly TPixel DarkSalmon = ColorBuilder<TPixel>.FromRgba(233, 150, 122, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8FBC8B.
         /// </summary>
-        public static readonly TPixel DarkSeaGreen = ColorBuilder<TPixel>.FromRGBA(143, 188, 139, 255);
+        public static readonly TPixel DarkSeaGreen = ColorBuilder<TPixel>.FromRgba(143, 188, 139, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #483D8B.
         /// </summary>
-        public static readonly TPixel DarkSlateBlue = ColorBuilder<TPixel>.FromRGBA(72, 61, 139, 255);
+        public static readonly TPixel DarkSlateBlue = ColorBuilder<TPixel>.FromRgba(72, 61, 139, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #2F4F4F.
         /// </summary>
-        public static readonly TPixel DarkSlateGray = ColorBuilder<TPixel>.FromRGBA(47, 79, 79, 255);
+        public static readonly TPixel DarkSlateGray = ColorBuilder<TPixel>.FromRgba(47, 79, 79, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00CED1.
         /// </summary>
-        public static readonly TPixel DarkTurquoise = ColorBuilder<TPixel>.FromRGBA(0, 206, 209, 255);
+        public static readonly TPixel DarkTurquoise = ColorBuilder<TPixel>.FromRgba(0, 206, 209, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9400D3.
         /// </summary>
-        public static readonly TPixel DarkViolet = ColorBuilder<TPixel>.FromRGBA(148, 0, 211, 255);
+        public static readonly TPixel DarkViolet = ColorBuilder<TPixel>.FromRgba(148, 0, 211, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF1493.
         /// </summary>
-        public static readonly TPixel DeepPink = ColorBuilder<TPixel>.FromRGBA(255, 20, 147, 255);
+        public static readonly TPixel DeepPink = ColorBuilder<TPixel>.FromRgba(255, 20, 147, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00BFFF.
         /// </summary>
-        public static readonly TPixel DeepSkyBlue = ColorBuilder<TPixel>.FromRGBA(0, 191, 255, 255);
+        public static readonly TPixel DeepSkyBlue = ColorBuilder<TPixel>.FromRgba(0, 191, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #696969.
         /// </summary>
-        public static readonly TPixel DimGray = ColorBuilder<TPixel>.FromRGBA(105, 105, 105, 255);
+        public static readonly TPixel DimGray = ColorBuilder<TPixel>.FromRgba(105, 105, 105, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #1E90FF.
         /// </summary>
-        public static readonly TPixel DodgerBlue = ColorBuilder<TPixel>.FromRGBA(30, 144, 255, 255);
+        public static readonly TPixel DodgerBlue = ColorBuilder<TPixel>.FromRgba(30, 144, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B22222.
         /// </summary>
-        public static readonly TPixel Firebrick = ColorBuilder<TPixel>.FromRGBA(178, 34, 34, 255);
+        public static readonly TPixel Firebrick = ColorBuilder<TPixel>.FromRgba(178, 34, 34, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFAF0.
         /// </summary>
-        public static readonly TPixel FloralWhite = ColorBuilder<TPixel>.FromRGBA(255, 250, 240, 255);
+        public static readonly TPixel FloralWhite = ColorBuilder<TPixel>.FromRgba(255, 250, 240, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #228B22.
         /// </summary>
-        public static readonly TPixel ForestGreen = ColorBuilder<TPixel>.FromRGBA(34, 139, 34, 255);
+        public static readonly TPixel ForestGreen = ColorBuilder<TPixel>.FromRgba(34, 139, 34, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF00FF.
         /// </summary>
-        public static readonly TPixel Fuchsia = ColorBuilder<TPixel>.FromRGBA(255, 0, 255, 255);
+        public static readonly TPixel Fuchsia = ColorBuilder<TPixel>.FromRgba(255, 0, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DCDCDC.
         /// </summary>
-        public static readonly TPixel Gainsboro = ColorBuilder<TPixel>.FromRGBA(220, 220, 220, 255);
+        public static readonly TPixel Gainsboro = ColorBuilder<TPixel>.FromRgba(220, 220, 220, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F8F8FF.
         /// </summary>
-        public static readonly TPixel GhostWhite = ColorBuilder<TPixel>.FromRGBA(248, 248, 255, 255);
+        public static readonly TPixel GhostWhite = ColorBuilder<TPixel>.FromRgba(248, 248, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFD700.
         /// </summary>
-        public static readonly TPixel Gold = ColorBuilder<TPixel>.FromRGBA(255, 215, 0, 255);
+        public static readonly TPixel Gold = ColorBuilder<TPixel>.FromRgba(255, 215, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DAA520.
         /// </summary>
-        public static readonly TPixel Goldenrod = ColorBuilder<TPixel>.FromRGBA(218, 165, 32, 255);
+        public static readonly TPixel Goldenrod = ColorBuilder<TPixel>.FromRgba(218, 165, 32, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #808080.
         /// </summary>
-        public static readonly TPixel Gray = ColorBuilder<TPixel>.FromRGBA(128, 128, 128, 255);
+        public static readonly TPixel Gray = ColorBuilder<TPixel>.FromRgba(128, 128, 128, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008000.
         /// </summary>
-        public static readonly TPixel Green = ColorBuilder<TPixel>.FromRGBA(0, 128, 0, 255);
+        public static readonly TPixel Green = ColorBuilder<TPixel>.FromRgba(0, 128, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #ADFF2F.
         /// </summary>
-        public static readonly TPixel GreenYellow = ColorBuilder<TPixel>.FromRGBA(173, 255, 47, 255);
+        public static readonly TPixel GreenYellow = ColorBuilder<TPixel>.FromRgba(173, 255, 47, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0FFF0.
         /// </summary>
-        public static readonly TPixel Honeydew = ColorBuilder<TPixel>.FromRGBA(240, 255, 240, 255);
+        public static readonly TPixel Honeydew = ColorBuilder<TPixel>.FromRgba(240, 255, 240, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF69B4.
         /// </summary>
-        public static readonly TPixel HotPink = ColorBuilder<TPixel>.FromRGBA(255, 105, 180, 255);
+        public static readonly TPixel HotPink = ColorBuilder<TPixel>.FromRgba(255, 105, 180, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #CD5C5C.
         /// </summary>
-        public static readonly TPixel IndianRed = ColorBuilder<TPixel>.FromRGBA(205, 92, 92, 255);
+        public static readonly TPixel IndianRed = ColorBuilder<TPixel>.FromRgba(205, 92, 92, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4B0082.
         /// </summary>
-        public static readonly TPixel Indigo = ColorBuilder<TPixel>.FromRGBA(75, 0, 130, 255);
+        public static readonly TPixel Indigo = ColorBuilder<TPixel>.FromRgba(75, 0, 130, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFF0.
         /// </summary>
-        public static readonly TPixel Ivory = ColorBuilder<TPixel>.FromRGBA(255, 255, 240, 255);
+        public static readonly TPixel Ivory = ColorBuilder<TPixel>.FromRgba(255, 255, 240, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0E68C.
         /// </summary>
-        public static readonly TPixel Khaki = ColorBuilder<TPixel>.FromRGBA(240, 230, 140, 255);
+        public static readonly TPixel Khaki = ColorBuilder<TPixel>.FromRgba(240, 230, 140, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E6E6FA.
         /// </summary>
-        public static readonly TPixel Lavender = ColorBuilder<TPixel>.FromRGBA(230, 230, 250, 255);
+        public static readonly TPixel Lavender = ColorBuilder<TPixel>.FromRgba(230, 230, 250, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF0F5.
         /// </summary>
-        public static readonly TPixel LavenderBlush = ColorBuilder<TPixel>.FromRGBA(255, 240, 245, 255);
+        public static readonly TPixel LavenderBlush = ColorBuilder<TPixel>.FromRgba(255, 240, 245, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7CFC00.
         /// </summary>
-        public static readonly TPixel LawnGreen = ColorBuilder<TPixel>.FromRGBA(124, 252, 0, 255);
+        public static readonly TPixel LawnGreen = ColorBuilder<TPixel>.FromRgba(124, 252, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFACD.
         /// </summary>
-        public static readonly TPixel LemonChiffon = ColorBuilder<TPixel>.FromRGBA(255, 250, 205, 255);
+        public static readonly TPixel LemonChiffon = ColorBuilder<TPixel>.FromRgba(255, 250, 205, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #ADD8E6.
         /// </summary>
-        public static readonly TPixel LightBlue = ColorBuilder<TPixel>.FromRGBA(173, 216, 230, 255);
+        public static readonly TPixel LightBlue = ColorBuilder<TPixel>.FromRgba(173, 216, 230, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F08080.
         /// </summary>
-        public static readonly TPixel LightCoral = ColorBuilder<TPixel>.FromRGBA(240, 128, 128, 255);
+        public static readonly TPixel LightCoral = ColorBuilder<TPixel>.FromRgba(240, 128, 128, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E0FFFF.
         /// </summary>
-        public static readonly TPixel LightCyan = ColorBuilder<TPixel>.FromRGBA(224, 255, 255, 255);
+        public static readonly TPixel LightCyan = ColorBuilder<TPixel>.FromRgba(224, 255, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAFAD2.
         /// </summary>
-        public static readonly TPixel LightGoldenrodYellow = ColorBuilder<TPixel>.FromRGBA(250, 250, 210, 255);
+        public static readonly TPixel LightGoldenrodYellow = ColorBuilder<TPixel>.FromRgba(250, 250, 210, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D3D3D3.
         /// </summary>
-        public static readonly TPixel LightGray = ColorBuilder<TPixel>.FromRGBA(211, 211, 211, 255);
+        public static readonly TPixel LightGray = ColorBuilder<TPixel>.FromRgba(211, 211, 211, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #90EE90.
         /// </summary>
-        public static readonly TPixel LightGreen = ColorBuilder<TPixel>.FromRGBA(144, 238, 144, 255);
+        public static readonly TPixel LightGreen = ColorBuilder<TPixel>.FromRgba(144, 238, 144, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFB6C1.
         /// </summary>
-        public static readonly TPixel LightPink = ColorBuilder<TPixel>.FromRGBA(255, 182, 193, 255);
+        public static readonly TPixel LightPink = ColorBuilder<TPixel>.FromRgba(255, 182, 193, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFA07A.
         /// </summary>
-        public static readonly TPixel LightSalmon = ColorBuilder<TPixel>.FromRGBA(255, 160, 122, 255);
+        public static readonly TPixel LightSalmon = ColorBuilder<TPixel>.FromRgba(255, 160, 122, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #20B2AA.
         /// </summary>
-        public static readonly TPixel LightSeaGreen = ColorBuilder<TPixel>.FromRGBA(32, 178, 170, 255);
+        public static readonly TPixel LightSeaGreen = ColorBuilder<TPixel>.FromRgba(32, 178, 170, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #87CEFA.
         /// </summary>
-        public static readonly TPixel LightSkyBlue = ColorBuilder<TPixel>.FromRGBA(135, 206, 250, 255);
+        public static readonly TPixel LightSkyBlue = ColorBuilder<TPixel>.FromRgba(135, 206, 250, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #778899.
         /// </summary>
-        public static readonly TPixel LightSlateGray = ColorBuilder<TPixel>.FromRGBA(119, 136, 153, 255);
+        public static readonly TPixel LightSlateGray = ColorBuilder<TPixel>.FromRgba(119, 136, 153, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B0C4DE.
         /// </summary>
-        public static readonly TPixel LightSteelBlue = ColorBuilder<TPixel>.FromRGBA(176, 196, 222, 255);
+        public static readonly TPixel LightSteelBlue = ColorBuilder<TPixel>.FromRgba(176, 196, 222, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFE0.
         /// </summary>
-        public static readonly TPixel LightYellow = ColorBuilder<TPixel>.FromRGBA(255, 255, 224, 255);
+        public static readonly TPixel LightYellow = ColorBuilder<TPixel>.FromRgba(255, 255, 224, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FF00.
         /// </summary>
-        public static readonly TPixel Lime = ColorBuilder<TPixel>.FromRGBA(0, 255, 0, 255);
+        public static readonly TPixel Lime = ColorBuilder<TPixel>.FromRgba(0, 255, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #32CD32.
         /// </summary>
-        public static readonly TPixel LimeGreen = ColorBuilder<TPixel>.FromRGBA(50, 205, 50, 255);
+        public static readonly TPixel LimeGreen = ColorBuilder<TPixel>.FromRgba(50, 205, 50, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAF0E6.
         /// </summary>
-        public static readonly TPixel Linen = ColorBuilder<TPixel>.FromRGBA(250, 240, 230, 255);
+        public static readonly TPixel Linen = ColorBuilder<TPixel>.FromRgba(250, 240, 230, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF00FF.
         /// </summary>
-        public static readonly TPixel Magenta = ColorBuilder<TPixel>.FromRGBA(255, 0, 255, 255);
+        public static readonly TPixel Magenta = ColorBuilder<TPixel>.FromRgba(255, 0, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #800000.
         /// </summary>
-        public static readonly TPixel Maroon = ColorBuilder<TPixel>.FromRGBA(128, 0, 0, 255);
+        public static readonly TPixel Maroon = ColorBuilder<TPixel>.FromRgba(128, 0, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #66CDAA.
         /// </summary>
-        public static readonly TPixel MediumAquamarine = ColorBuilder<TPixel>.FromRGBA(102, 205, 170, 255);
+        public static readonly TPixel MediumAquamarine = ColorBuilder<TPixel>.FromRgba(102, 205, 170, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #0000CD.
         /// </summary>
-        public static readonly TPixel MediumBlue = ColorBuilder<TPixel>.FromRGBA(0, 0, 205, 255);
+        public static readonly TPixel MediumBlue = ColorBuilder<TPixel>.FromRgba(0, 0, 205, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BA55D3.
         /// </summary>
-        public static readonly TPixel MediumOrchid = ColorBuilder<TPixel>.FromRGBA(186, 85, 211, 255);
+        public static readonly TPixel MediumOrchid = ColorBuilder<TPixel>.FromRgba(186, 85, 211, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9370DB.
         /// </summary>
-        public static readonly TPixel MediumPurple = ColorBuilder<TPixel>.FromRGBA(147, 112, 219, 255);
+        public static readonly TPixel MediumPurple = ColorBuilder<TPixel>.FromRgba(147, 112, 219, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #3CB371.
         /// </summary>
-        public static readonly TPixel MediumSeaGreen = ColorBuilder<TPixel>.FromRGBA(60, 179, 113, 255);
+        public static readonly TPixel MediumSeaGreen = ColorBuilder<TPixel>.FromRgba(60, 179, 113, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7B68EE.
         /// </summary>
-        public static readonly TPixel MediumSlateBlue = ColorBuilder<TPixel>.FromRGBA(123, 104, 238, 255);
+        public static readonly TPixel MediumSlateBlue = ColorBuilder<TPixel>.FromRgba(123, 104, 238, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FA9A.
         /// </summary>
-        public static readonly TPixel MediumSpringGreen = ColorBuilder<TPixel>.FromRGBA(0, 250, 154, 255);
+        public static readonly TPixel MediumSpringGreen = ColorBuilder<TPixel>.FromRgba(0, 250, 154, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #48D1CC.
         /// </summary>
-        public static readonly TPixel MediumTurquoise = ColorBuilder<TPixel>.FromRGBA(72, 209, 204, 255);
+        public static readonly TPixel MediumTurquoise = ColorBuilder<TPixel>.FromRgba(72, 209, 204, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #C71585.
         /// </summary>
-        public static readonly TPixel MediumVioletRed = ColorBuilder<TPixel>.FromRGBA(199, 21, 133, 255);
+        public static readonly TPixel MediumVioletRed = ColorBuilder<TPixel>.FromRgba(199, 21, 133, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #191970.
         /// </summary>
-        public static readonly TPixel MidnightBlue = ColorBuilder<TPixel>.FromRGBA(25, 25, 112, 255);
+        public static readonly TPixel MidnightBlue = ColorBuilder<TPixel>.FromRgba(25, 25, 112, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5FFFA.
         /// </summary>
-        public static readonly TPixel MintCream = ColorBuilder<TPixel>.FromRGBA(245, 255, 250, 255);
+        public static readonly TPixel MintCream = ColorBuilder<TPixel>.FromRgba(245, 255, 250, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4E1.
         /// </summary>
-        public static readonly TPixel MistyRose = ColorBuilder<TPixel>.FromRGBA(255, 228, 225, 255);
+        public static readonly TPixel MistyRose = ColorBuilder<TPixel>.FromRgba(255, 228, 225, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4B5.
         /// </summary>
-        public static readonly TPixel Moccasin = ColorBuilder<TPixel>.FromRGBA(255, 228, 181, 255);
+        public static readonly TPixel Moccasin = ColorBuilder<TPixel>.FromRgba(255, 228, 181, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFDEAD.
         /// </summary>
-        public static readonly TPixel NavajoWhite = ColorBuilder<TPixel>.FromRGBA(255, 222, 173, 255);
+        public static readonly TPixel NavajoWhite = ColorBuilder<TPixel>.FromRgba(255, 222, 173, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #000080.
         /// </summary>
-        public static readonly TPixel Navy = ColorBuilder<TPixel>.FromRGBA(0, 0, 128, 255);
+        public static readonly TPixel Navy = ColorBuilder<TPixel>.FromRgba(0, 0, 128, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FDF5E6.
         /// </summary>
-        public static readonly TPixel OldLace = ColorBuilder<TPixel>.FromRGBA(253, 245, 230, 255);
+        public static readonly TPixel OldLace = ColorBuilder<TPixel>.FromRgba(253, 245, 230, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #808000.
         /// </summary>
-        public static readonly TPixel Olive = ColorBuilder<TPixel>.FromRGBA(128, 128, 0, 255);
+        public static readonly TPixel Olive = ColorBuilder<TPixel>.FromRgba(128, 128, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6B8E23.
         /// </summary>
-        public static readonly TPixel OliveDrab = ColorBuilder<TPixel>.FromRGBA(107, 142, 35, 255);
+        public static readonly TPixel OliveDrab = ColorBuilder<TPixel>.FromRgba(107, 142, 35, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFA500.
         /// </summary>
-        public static readonly TPixel Orange = ColorBuilder<TPixel>.FromRGBA(255, 165, 0, 255);
+        public static readonly TPixel Orange = ColorBuilder<TPixel>.FromRgba(255, 165, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF4500.
         /// </summary>
-        public static readonly TPixel OrangeRed = ColorBuilder<TPixel>.FromRGBA(255, 69, 0, 255);
+        public static readonly TPixel OrangeRed = ColorBuilder<TPixel>.FromRgba(255, 69, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DA70D6.
         /// </summary>
-        public static readonly TPixel Orchid = ColorBuilder<TPixel>.FromRGBA(218, 112, 214, 255);
+        public static readonly TPixel Orchid = ColorBuilder<TPixel>.FromRgba(218, 112, 214, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #EEE8AA.
         /// </summary>
-        public static readonly TPixel PaleGoldenrod = ColorBuilder<TPixel>.FromRGBA(238, 232, 170, 255);
+        public static readonly TPixel PaleGoldenrod = ColorBuilder<TPixel>.FromRgba(238, 232, 170, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #98FB98.
         /// </summary>
-        public static readonly TPixel PaleGreen = ColorBuilder<TPixel>.FromRGBA(152, 251, 152, 255);
+        public static readonly TPixel PaleGreen = ColorBuilder<TPixel>.FromRgba(152, 251, 152, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #AFEEEE.
         /// </summary>
-        public static readonly TPixel PaleTurquoise = ColorBuilder<TPixel>.FromRGBA(175, 238, 238, 255);
+        public static readonly TPixel PaleTurquoise = ColorBuilder<TPixel>.FromRgba(175, 238, 238, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DB7093.
         /// </summary>
-        public static readonly TPixel PaleVioletRed = ColorBuilder<TPixel>.FromRGBA(219, 112, 147, 255);
+        public static readonly TPixel PaleVioletRed = ColorBuilder<TPixel>.FromRgba(219, 112, 147, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFEFD5.
         /// </summary>
-        public static readonly TPixel PapayaWhip = ColorBuilder<TPixel>.FromRGBA(255, 239, 213, 255);
+        public static readonly TPixel PapayaWhip = ColorBuilder<TPixel>.FromRgba(255, 239, 213, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFDAB9.
         /// </summary>
-        public static readonly TPixel PeachPuff = ColorBuilder<TPixel>.FromRGBA(255, 218, 185, 255);
+        public static readonly TPixel PeachPuff = ColorBuilder<TPixel>.FromRgba(255, 218, 185, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #CD853F.
         /// </summary>
-        public static readonly TPixel Peru = ColorBuilder<TPixel>.FromRGBA(205, 133, 63, 255);
+        public static readonly TPixel Peru = ColorBuilder<TPixel>.FromRgba(205, 133, 63, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFC0CB.
         /// </summary>
-        public static readonly TPixel Pink = ColorBuilder<TPixel>.FromRGBA(255, 192, 203, 255);
+        public static readonly TPixel Pink = ColorBuilder<TPixel>.FromRgba(255, 192, 203, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DDA0DD.
         /// </summary>
-        public static readonly TPixel Plum = ColorBuilder<TPixel>.FromRGBA(221, 160, 221, 255);
+        public static readonly TPixel Plum = ColorBuilder<TPixel>.FromRgba(221, 160, 221, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B0E0E6.
         /// </summary>
-        public static readonly TPixel PowderBlue = ColorBuilder<TPixel>.FromRGBA(176, 224, 230, 255);
+        public static readonly TPixel PowderBlue = ColorBuilder<TPixel>.FromRgba(176, 224, 230, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #800080.
         /// </summary>
-        public static readonly TPixel Purple = ColorBuilder<TPixel>.FromRGBA(128, 0, 128, 255);
+        public static readonly TPixel Purple = ColorBuilder<TPixel>.FromRgba(128, 0, 128, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #663399.
         /// </summary>
-        public static readonly TPixel RebeccaPurple = ColorBuilder<TPixel>.FromRGBA(102, 51, 153, 255);
+        public static readonly TPixel RebeccaPurple = ColorBuilder<TPixel>.FromRgba(102, 51, 153, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF0000.
         /// </summary>
-        public static readonly TPixel Red = ColorBuilder<TPixel>.FromRGBA(255, 0, 0, 255);
+        public static readonly TPixel Red = ColorBuilder<TPixel>.FromRgba(255, 0, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BC8F8F.
         /// </summary>
-        public static readonly TPixel RosyBrown = ColorBuilder<TPixel>.FromRGBA(188, 143, 143, 255);
+        public static readonly TPixel RosyBrown = ColorBuilder<TPixel>.FromRgba(188, 143, 143, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4169E1.
         /// </summary>
-        public static readonly TPixel RoyalBlue = ColorBuilder<TPixel>.FromRGBA(65, 105, 225, 255);
+        public static readonly TPixel RoyalBlue = ColorBuilder<TPixel>.FromRgba(65, 105, 225, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B4513.
         /// </summary>
-        public static readonly TPixel SaddleBrown = ColorBuilder<TPixel>.FromRGBA(139, 69, 19, 255);
+        public static readonly TPixel SaddleBrown = ColorBuilder<TPixel>.FromRgba(139, 69, 19, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FA8072.
         /// </summary>
-        public static readonly TPixel Salmon = ColorBuilder<TPixel>.FromRGBA(250, 128, 114, 255);
+        public static readonly TPixel Salmon = ColorBuilder<TPixel>.FromRgba(250, 128, 114, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F4A460.
         /// </summary>
-        public static readonly TPixel SandyBrown = ColorBuilder<TPixel>.FromRGBA(244, 164, 96, 255);
+        public static readonly TPixel SandyBrown = ColorBuilder<TPixel>.FromRgba(244, 164, 96, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #2E8B57.
         /// </summary>
-        public static readonly TPixel SeaGreen = ColorBuilder<TPixel>.FromRGBA(46, 139, 87, 255);
+        public static readonly TPixel SeaGreen = ColorBuilder<TPixel>.FromRgba(46, 139, 87, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF5EE.
         /// </summary>
-        public static readonly TPixel SeaShell = ColorBuilder<TPixel>.FromRGBA(255, 245, 238, 255);
+        public static readonly TPixel SeaShell = ColorBuilder<TPixel>.FromRgba(255, 245, 238, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A0522D.
         /// </summary>
-        public static readonly TPixel Sienna = ColorBuilder<TPixel>.FromRGBA(160, 82, 45, 255);
+        public static readonly TPixel Sienna = ColorBuilder<TPixel>.FromRgba(160, 82, 45, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #C0C0C0.
         /// </summary>
-        public static readonly TPixel Silver = ColorBuilder<TPixel>.FromRGBA(192, 192, 192, 255);
+        public static readonly TPixel Silver = ColorBuilder<TPixel>.FromRgba(192, 192, 192, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #87CEEB.
         /// </summary>
-        public static readonly TPixel SkyBlue = ColorBuilder<TPixel>.FromRGBA(135, 206, 235, 255);
+        public static readonly TPixel SkyBlue = ColorBuilder<TPixel>.FromRgba(135, 206, 235, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6A5ACD.
         /// </summary>
-        public static readonly TPixel SlateBlue = ColorBuilder<TPixel>.FromRGBA(106, 90, 205, 255);
+        public static readonly TPixel SlateBlue = ColorBuilder<TPixel>.FromRgba(106, 90, 205, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #708090.
         /// </summary>
-        public static readonly TPixel SlateGray = ColorBuilder<TPixel>.FromRGBA(112, 128, 144, 255);
+        public static readonly TPixel SlateGray = ColorBuilder<TPixel>.FromRgba(112, 128, 144, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFAFA.
         /// </summary>
-        public static readonly TPixel Snow = ColorBuilder<TPixel>.FromRGBA(255, 250, 250, 255);
+        public static readonly TPixel Snow = ColorBuilder<TPixel>.FromRgba(255, 250, 250, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FF7F.
         /// </summary>
-        public static readonly TPixel SpringGreen = ColorBuilder<TPixel>.FromRGBA(0, 255, 127, 255);
+        public static readonly TPixel SpringGreen = ColorBuilder<TPixel>.FromRgba(0, 255, 127, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4682B4.
         /// </summary>
-        public static readonly TPixel SteelBlue = ColorBuilder<TPixel>.FromRGBA(70, 130, 180, 255);
+        public static readonly TPixel SteelBlue = ColorBuilder<TPixel>.FromRgba(70, 130, 180, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D2B48C.
         /// </summary>
-        public static readonly TPixel Tan = ColorBuilder<TPixel>.FromRGBA(210, 180, 140, 255);
+        public static readonly TPixel Tan = ColorBuilder<TPixel>.FromRgba(210, 180, 140, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008080.
         /// </summary>
-        public static readonly TPixel Teal = ColorBuilder<TPixel>.FromRGBA(0, 128, 128, 255);
+        public static readonly TPixel Teal = ColorBuilder<TPixel>.FromRgba(0, 128, 128, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D8BFD8.
         /// </summary>
-        public static readonly TPixel Thistle = ColorBuilder<TPixel>.FromRGBA(216, 191, 216, 255);
+        public static readonly TPixel Thistle = ColorBuilder<TPixel>.FromRgba(216, 191, 216, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF6347.
         /// </summary>
-        public static readonly TPixel Tomato = ColorBuilder<TPixel>.FromRGBA(255, 99, 71, 255);
+        public static readonly TPixel Tomato = ColorBuilder<TPixel>.FromRgba(255, 99, 71, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFFF.
         /// </summary>
-        public static readonly TPixel Transparent = ColorBuilder<TPixel>.FromRGBA(255, 255, 255, 0);
+        public static readonly TPixel Transparent = ColorBuilder<TPixel>.FromRgba(255, 255, 255, 0);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #40E0D0.
         /// </summary>
-        public static readonly TPixel Turquoise = ColorBuilder<TPixel>.FromRGBA(64, 224, 208, 255);
+        public static readonly TPixel Turquoise = ColorBuilder<TPixel>.FromRgba(64, 224, 208, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #EE82EE.
         /// </summary>
-        public static readonly TPixel Violet = ColorBuilder<TPixel>.FromRGBA(238, 130, 238, 255);
+        public static readonly TPixel Violet = ColorBuilder<TPixel>.FromRgba(238, 130, 238, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5DEB3.
         /// </summary>
-        public static readonly TPixel Wheat = ColorBuilder<TPixel>.FromRGBA(245, 222, 179, 255);
+        public static readonly TPixel Wheat = ColorBuilder<TPixel>.FromRgba(245, 222, 179, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFFF.
         /// </summary>
-        public static readonly TPixel White = ColorBuilder<TPixel>.FromRGBA(255, 255, 255, 255);
+        public static readonly TPixel White = ColorBuilder<TPixel>.FromRgba(255, 255, 255, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5F5F5.
         /// </summary>
-        public static readonly TPixel WhiteSmoke = ColorBuilder<TPixel>.FromRGBA(245, 245, 245, 255);
+        public static readonly TPixel WhiteSmoke = ColorBuilder<TPixel>.FromRgba(245, 245, 245, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFF00.
         /// </summary>
-        public static readonly TPixel Yellow = ColorBuilder<TPixel>.FromRGBA(255, 255, 0, 255);
+        public static readonly TPixel Yellow = ColorBuilder<TPixel>.FromRgba(255, 255, 0, 255);
 
         /// <summary>
         /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9ACD32.
         /// </summary>
-        public static readonly TPixel YellowGreen = ColorBuilder<TPixel>.FromRGBA(154, 205, 50, 255);
+        public static readonly TPixel YellowGreen = ColorBuilder<TPixel>.FromRgba(154, 205, 50, 255);
 
         /// <summary>
         /// Gets a <see cref="T:TPixel[]"/> collection of web safe, colors as defined in the CSS Color Module Level 4.

From e492b684029e863dc54a68ee037234833384d1d8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 15:49:58 +0200
Subject: [PATCH 166/223] temporarily disable target frameworks

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj | 3 ++-
 src/ImageSharp/ImageSharp.csproj                 | 3 ++-
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj   | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 915915f6cc..fdeb27a770 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -11,7 +11,8 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
+    <TargetFramework>netstandard2.0</TargetFramework>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index d734648f41..4abe2f57a2 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -11,7 +11,8 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
+    <TargetFramework>netstandard2.0</TargetFramework>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 0b727f30ce..efdf89964c 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
+    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From 09d6fe7ccf59c6e2de8f15e0e8f15372f61b0552 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 11 May 2019 16:27:51 +0200
Subject: [PATCH 167/223] Enabled dither again

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index be82e2cab3..8d0e8578d1 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -304,7 +304,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             byte[] colorPalette = new byte[ColorPaletteSize8Bit];
 #endif
 
-            var quantizer = new OctreeQuantizer(dither: false, maxColors: 256);
+            var quantizer = new OctreeQuantizer(dither: true, maxColors: 256);
             QuantizedFrame<TPixel> quantized = quantizer.CreateFrameQuantizer<TPixel>(this.configuration).QuantizeFrame(image);
 
             int idx = 0;

From 5c571f5d9f16c2f6aa78b4f07af1289ffb9c7f1f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 17:00:16 +0200
Subject: [PATCH 168/223] validating tests for: DrawPath, FillComplexPolygon

---
 .../ImageSharp.Tests/Drawing/DrawPathTests.cs | 133 +++++++-----------
 .../Drawing/FillComplexPolygonTests.cs        |  62 ++++++++
 ...tternTests.cs => FillPatternBrushTests.cs} |   6 +-
 .../Drawing/SolidComplexPolygonTests.cs       | 109 --------------
 .../Processors/Overlays/OverlayTestBase.cs    |   3 +-
 .../TestUtilities/TestUtils.cs                |   9 +-
 tests/Images/External                         |   2 +-
 7 files changed, 125 insertions(+), 199 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
 rename tests/ImageSharp.Tests/Drawing/{FillPatternTests.cs => FillPatternBrushTests.cs} (98%)
 delete mode 100644 tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs

diff --git a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
index d2485f334a..c638107b81 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
@@ -1,112 +1,79 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.Primitives;
 using SixLabors.Shapes;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Drawing
 {
-    public class DrawPathTests : FileTestBase
+    [GroupOutput("Drawing")]
+    public class DrawPathTests
     {
-        [Fact]
-        public void ImageShouldBeOverlayedByPath()
+        public static readonly TheoryData<string, byte, float> DrawPathData = new TheoryData<string, byte, float>
+                                                                                {
+                                                                                    { "White", 255, 1.5f },
+                                                                                    { "Red", 255, 3 },
+                                                                                    { "HotPink", 255, 5 },
+                                                                                    { "HotPink", 150, 5 },
+                                                                                    { "White", 255, 15 },
+                                                                                };
+
+        [Theory]
+        [WithSolidFilledImages(nameof(DrawPathData), 300, 450, "Blue", PixelTypes.Rgba32)]
+        public void DrawPath<TPixel>(TestImageProvider<TPixel> provider, string colorName, byte alpha, float thickness)
+            where TPixel : struct, IPixel<TPixel>
         {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Path");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                var linerSegemnt = new LinearLineSegment(
-                    new Vector2(10, 10),
-                    new Vector2(200, 150),
-                    new Vector2(50, 300));
-                var bazierSegment = new CubicBezierLineSegment(
-                    new Vector2(50, 300),
-                    new Vector2(500, 500),
-                    new Vector2(60, 10),
-                    new Vector2(10, 400));
-
-                var p = new Path(linerSegemnt, bazierSegment);
-                
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, p));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[11, 11]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-            }
-        }
-
-
-        [Fact]
-        public void ImageShouldBeOverlayedPathWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Path");
-
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-
             var linerSegemnt = new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-                    );
-
-            var bazierSegment = new CubicBezierLineSegment(new Vector2(50, 300),
+                new Vector2(10, 10),
+                new Vector2(200, 150),
+                new Vector2(50, 300));
+            var bazierSegment = new CubicBezierLineSegment(
+                new Vector2(50, 300),
                 new Vector2(500, 500),
                 new Vector2(60, 10),
                 new Vector2(10, 400));
 
-            var p = new Path(linerSegemnt, bazierSegment);
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(color, 10, p));
-                image.Save($"{path}/Opacity.png");
+            var path = new Path(linerSegemnt, bazierSegment);
 
-                //shift background color towards forground color by the opacity amount
-                var mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
+            Rgba32 rgba = TestUtils.GetColorByName(colorName);
+            rgba.A = alpha;
+            Color color = rgba;
 
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(mergedColor, sourcePixels[11, 11]);
+            FormattableString testDetails = $"{colorName}_A{alpha}_T{thickness}";
 
-                Assert.Equal(mergedColor, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-            }
+            provider.RunValidatingProcessorTest(
+                x => x.Draw(color.ToPixel<TPixel>(), thickness, path),
+                testDetails,
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
         }
 
-        [Fact]
-        public void PathExtendingOffEdgeOfImageShouldNotBeCropped()
+        [Theory]
+        [WithSolidFilledImages(256, 256, "Black", PixelTypes.Rgba32)]
+        public void PathExtendingOffEdgeOfImageShouldNotBeCropped<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
         {
-
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Path");
-            using (var image = new Image<Rgba32>(256, 256))
-            {
-                image.Mutate(x => x.Fill(Rgba32.Black));
-                Pen<Rgba32> pen = Pens.Solid(Rgba32.White, 5f);
-
-                for (int i = 0; i < 300; i += 20)
-                {
-                    image.Mutate(
-                        x => x.DrawLines(
-                            pen,
-                            new SixLabors.Primitives.PointF[] { new Vector2(100, 2), new Vector2(-10, i) }));
-                }
-
-                image.Save($"{path}/ClippedLines.png");
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.White, sourcePixels[0, 90]);
-            }
+            Color color = Color.White;
+            Pen<TPixel> pen = Pens.Solid(color.ToPixel<TPixel>(), 5f);
+
+            provider.RunValidatingProcessorTest(
+                x =>
+                    {
+                        for (int i = 0; i < 300; i += 20)
+                        {
+                            PointF[] points = new PointF[] { new Vector2(100, 2), new Vector2(-10, i) };
+                            x.DrawLines(pen, points);
+                        }
+                    },
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
new file mode 100644
index 0000000000..3887cb9a7a
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
@@ -0,0 +1,62 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Numerics;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.Shapes;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class FillComplexPolygonTests
+    {
+        [Theory]
+        [WithSolidFilledImages(300, 400, "Blue", PixelTypes.Rgba32, false, false)]
+        [WithSolidFilledImages(300, 400, "Blue", PixelTypes.Rgba32, true, false)]
+        [WithSolidFilledImages(300, 400, "Blue", PixelTypes.Rgba32, false, true)]
+        public void ComplexPolygon_SolidFill<TPixel>(TestImageProvider<TPixel> provider, bool overlap, bool transparent)
+            where TPixel :struct, IPixel<TPixel>
+        {
+            var simplePath = new Polygon(new LinearLineSegment(
+                new Vector2(10, 10),
+                new Vector2(200, 150),
+                new Vector2(50, 300)));
+
+            var hole1 = new Polygon(new LinearLineSegment(
+                new Vector2(37, 85),
+                overlap ? new Vector2(130, 40) : new Vector2(93, 85),
+                new Vector2(65, 137)));
+            IPath clipped = simplePath.Clip(hole1);
+
+            Rgba32 colorRgba = Rgba32.HotPink;
+            if (transparent)
+            {
+                colorRgba.A = 150;
+            }
+
+            Color color = colorRgba;
+
+            string testDetails = "";
+            if (overlap)
+            {
+                testDetails += "_Overlap";
+            }
+
+            if (transparent)
+            {
+                testDetails += "_Transparent";
+            }
+
+            provider.RunValidatingProcessorTest(
+                x => x.Fill(color.ToPixel<TPixel>(), clipped),
+                testDetails,
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Drawing/FillPatternTests.cs b/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
similarity index 98%
rename from tests/ImageSharp.Tests/Drawing/FillPatternTests.cs
rename to tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
index b310c7afc6..dcc689fe1c 100644
--- a/tests/ImageSharp.Tests/Drawing/FillPatternTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
@@ -12,11 +12,11 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Drawing
 {
-    public class FillPatternBrushTests : FileTestBase
+    public class FillPatternBrushTests
     {
         private void Test(string name, Rgba32 background, IBrush<Rgba32> brush, Rgba32[,] expectedPattern)
         {
-            string path = TestEnvironment.CreateOutputDirectory("Fill", "PatternBrush");
+            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FillPatternBrushTests");
             using (var image = new Image<Rgba32>(20, 20))
             {
                 image.Mutate(x => x.Fill(background).Fill(brush));
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                     }
                 }
 
-                image.Mutate(x => x.Resize(80, 80));
+                image.Mutate(x => x.Resize(80, 80, KnownResamplers.NearestNeighbor));
                 image.Save($"{path}/{name}x4.png");
             }
         }
diff --git a/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs
deleted file mode 100644
index 0e997ad7eb..0000000000
--- a/tests/ImageSharp.Tests/Drawing/SolidComplexPolygonTests.cs
+++ /dev/null
@@ -1,109 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Numerics;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.Shapes;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Drawing
-{
-    public class SolidComplexPolygonTests : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutline()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "ComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(93, 85),
-                            new Vector2(65, 137)));
-            IPath clipped = simplePath.Clip(hole1);
-            // var clipped = new Rectangle(10, 10, 100, 100).Clip(new Rectangle(20, 0, 20, 20));
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Fill(Rgba32.HotPink, clipped));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[20, 35]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[60, 100]);
-            }
-        }
-
-
-        [Fact]
-        public void ImageShouldBeOverlayedPolygonOutlineWithOverlap()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "ComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(130, 40),
-                            new Vector2(65, 137)));
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Fill(Rgba32.HotPink, simplePath.Clip(hole1)));
-                image.Save($"{path}/SimpleOverlapping.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[20, 35]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[60, 100]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedPolygonOutlineWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "ComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(93, 85),
-                            new Vector2(65, 137)));
-
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Fill(color, simplePath.Clip(hole1)));
-                image.Save($"{path}/Opacity.png");
-
-                //shift background color towards forground color by the opacity amount
-                var mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(mergedColor, sourcePixels[20, 35]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[60, 100]);
-            }
-        }
-    }
-}
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
index 788f7e1ade..eaad82f9a3 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Overlays/OverlayTestBase.cs
@@ -27,8 +27,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Overlays
             where TPixel : struct, IPixel<TPixel>
         {
             provider.Utility.TestGroupName = this.GetType().Name;
-            var f = (FieldInfo)typeof(Color).GetMember(colorName)[0];
-            Color color = (Color)f.GetValue(null);
+            Color color = TestUtils.GetColorByName(colorName);
 
             provider.RunValidatingProcessorTest(x => this.Apply(x, color), colorName, ValidatorComparer, appendPixelTypeToFileName: false);
         }
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
index e51aa28d8f..5db0c08282 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
@@ -141,8 +141,15 @@ namespace SixLabors.ImageSharp.Tests
         /// <returns>The pixel types</returns>
         internal static PixelTypes[] GetAllPixelTypes() => (PixelTypes[])Enum.GetValues(typeof(PixelTypes));
 
+        internal static Color GetColorByName(string colorName)
+        {
+            var f = (FieldInfo)typeof(Color).GetMember(colorName)[0];
+            return (Color)f.GetValue(null);
+        }
+
         internal static TPixel GetPixelOfNamedColor<TPixel>(string colorName)
-            where TPixel : struct, IPixel<TPixel> => (TPixel)typeof(NamedColors<TPixel>).GetTypeInfo().GetField(colorName).GetValue(null);
+            where TPixel : struct, IPixel<TPixel> =>
+            GetColorByName(colorName).ToPixel<TPixel>();
 
         /// <summary>
         /// Utility for testing image processor extension methods:
diff --git a/tests/Images/External b/tests/Images/External
index c057090b44..d83843deed 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit c057090b4402120a83a8efe251aa5b691db9c0dc
+Subproject commit d83843deedc43712f29f631aab090640b4f54946

From 445d0f8bf0ca007c49c567adc72768cbfd86da6f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sat, 11 May 2019 23:53:27 +0200
Subject: [PATCH 169/223] validation in DrawImageTest

---
 .../ImageSharp.Tests/Drawing/DrawImageTest.cs | 198 ------------------
 .../Drawing/DrawImageTests.cs                 | 174 +++++++++++++++
 .../TestUtilities/TestImageExtensions.cs      |  25 ++-
 tests/Images/External                         |   2 +-
 4 files changed, 192 insertions(+), 207 deletions(-)
 delete mode 100644 tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
 create mode 100644 tests/ImageSharp.Tests/Drawing/DrawImageTests.cs

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
deleted file mode 100644
index 54b04390ec..0000000000
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
+++ /dev/null
@@ -1,198 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
-using SixLabors.Primitives;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    [GroupOutput("Drawing")]
-    public class DrawImageTest : FileTestBase
-    {
-        private const PixelTypes PixelTypes = Tests.PixelTypes.Rgba32;
-
-        public static readonly string[] TestFiles = {
-               TestImages.Jpeg.Baseline.Calliphora,
-               TestImages.Bmp.Car,
-               TestImages.Png.Splash,
-               TestImages.Gif.Rings
-        };
-
-        [Theory]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Normal)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Multiply)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Add)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Subtract)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Screen)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Darken)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Lighten)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Overlay)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.HardLight)]
-        public void ImageShouldApplyDrawImage<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
-            {
-                blend.Mutate(x => x.Resize(image.Width / 2, image.Height / 2));
-                image.Mutate(x => x.DrawImage(blend, new Point(image.Width / 4, image.Height / 4), mode, .75f));
-                image.DebugSave(provider, new { mode });
-            }
-        }
-
-        [Theory]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Normal)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Multiply)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Add)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Subtract)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Screen)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Darken)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Lighten)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Overlay)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.HardLight)]
-        public void ImageBlendingMatchesSvgSpecExamples<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> background = provider.GetImage())
-            using (var source = Image.Load<TPixel>(TestFile.Create(TestImages.Png.Ducky).Bytes))
-            {
-                background.Mutate(x => x.DrawImage(source, mode, 1F));
-                VerifyImage(provider, mode, background);
-            }
-        }
-
-        [Theory]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Normal)]
-        public void ImageShouldDrawTransformedImage<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
-            {
-                AffineTransformBuilder builder = new AffineTransformBuilder()
-                    .AppendRotationDegrees(45F)
-                    .AppendScale(new SizeF(.25F, .25F))
-                    .AppendTranslation(new PointF(10, 10));
-
-                // Apply a background color so we can see the translation.
-                blend.Mutate(x => x.Transform(builder));
-                blend.Mutate(x => x.BackgroundColor(Color.HotPink));
-
-                // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
-                var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
-                image.Mutate(x => x.DrawImage(blend, position, mode, .75F));
-                image.DebugSave(provider, new[] { "Transformed" });
-            }
-        }
-
-        [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandleNegativeLocation(TestImageProvider<Rgba32> provider)
-        {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(50, 50))
-            {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = -25;
-                Rgba32 backgroundPixel = background[0, 0];
-                Rgba32 overlayPixel = overlay[Math.Abs(xy) + 1, Math.Abs(xy) + 1];
-
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
-
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[0, 0]);
-
-                background.DebugSave(provider, testOutputDetails: "Negative");
-            }
-        }
-
-        [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandlePositiveLocation(TestImageProvider<Rgba32> provider)
-        {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(50, 50))
-            {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = 25;
-                Rgba32 backgroundPixel = background[xy - 1, xy - 1];
-                Rgba32 overlayPixel = overlay[0, 0];
-
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
-
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[xy, xy]);
-
-                background.DebugSave(provider, testOutputDetails: "Positive");
-            }
-        }
-        [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandlePositiveLocationTruncatedOverlay(TestImageProvider<Rgba32> provider)
-        {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(50, 50))
-            {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = 75;
-                Rgba32 backgroundPixel = background[xy - 1, xy - 1];
-                Rgba32 overlayPixel = overlay[0, 0];
-
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
-
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[xy, xy]);
-
-                background.DebugSave(provider, testOutputDetails: "PositiveTruncated");
-            }
-        }
-
-        [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, -30)]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, -30)]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, 130)]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, 130)]
-        public void NonOverlappingImageThrows(TestImageProvider<Rgba32> provider, int x, int y)
-        {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(Configuration.Default, 10, 10, Rgba32.Black))
-            {
-                ImageProcessingException ex = Assert.Throws<ImageProcessingException>(Test);
-
-                Assert.Contains("does not overlap", ex.ToString());
-
-                void Test()
-                {
-                    background.Mutate(context => context.DrawImage(overlay, new Point(x, y), GraphicsOptions.Default));
-                }
-            }
-        }
-
-        private static void VerifyImage<TPixel>(
-            TestImageProvider<TPixel> provider,
-            PixelColorBlendingMode mode,
-            Image<TPixel> img)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            img.DebugSave(
-                provider,
-                new { mode },
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-
-            var comparer = ImageComparer.TolerantPercentage(0.01F, 3);
-            img.CompareFirstFrameToReferenceOutput(comparer,
-                provider,
-                new { mode },
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
new file mode 100644
index 0000000000..f4e9b7b450
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -0,0 +1,174 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Png;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
+using SixLabors.Shapes;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class DrawImageTests
+    {
+        public static readonly TheoryData<PixelColorBlendingMode> BlendingModes = new TheoryData<PixelColorBlendingMode>
+            {
+                PixelColorBlendingMode.Normal,
+                PixelColorBlendingMode.Multiply,
+                PixelColorBlendingMode.Add,
+                PixelColorBlendingMode.Subtract,
+                PixelColorBlendingMode.Screen,
+                PixelColorBlendingMode.Darken,
+                PixelColorBlendingMode.Lighten,
+                PixelColorBlendingMode.Overlay,
+                PixelColorBlendingMode.HardLight,
+            };
+
+        [Theory]
+        [WithFile( TestImages.Png.Rainbow,nameof(BlendingModes), PixelTypes.Rgba32)]
+        public void ImageBlendingMatchesSvgSpecExamples<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> background = provider.GetImage())
+            using (var source = Image.Load<TPixel>(TestFile.Create(TestImages.Png.Ducky).Bytes))
+            {
+                background.Mutate(x => x.DrawImage(source, mode, 1F));
+                background.DebugSave(
+                    provider,
+                    new { mode = mode },
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
+
+                var comparer = ImageComparer.TolerantPercentage(0.01F);
+                background.CompareToReferenceOutput(comparer,
+                    provider,
+                    new { mode = mode },
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
+            }
+        }
+        
+        [Theory]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Bgr24, TestImages.Png.Bike, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.75f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.25f)]
+        
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Multiply, 0.5f)]
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Add, 0.5f)]
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Subtract, 0.5f)]
+
+        [WithFile(TestImages.Png.Rgb48Bpp, PixelTypes.Rgba64, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.Rgb48Bpp, PixelTypes.Rgba64, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.25f)]
+        public void WorksWithDifferentConfigurations<TPixel>(
+            TestImageProvider<TPixel> provider,
+            string brushImage,
+            PixelColorBlendingMode mode,
+            float opacity)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            using (var blend = Image.Load<TPixel>(TestFile.Create(brushImage).Bytes))
+            {
+                Size size = new Size(image.Width * 3 / 4, image.Height *3/ 4);
+                Point position = new Point(image.Width / 8, image.Height / 8);
+                blend.Mutate(x => x.Resize(size.Width, size.Height, KnownResamplers.Bicubic));
+                image.Mutate(x => x.DrawImage(blend, position, mode, opacity));
+                FormattableString testInfo = $"{System.IO.Path.GetFileNameWithoutExtension(brushImage)}-{mode}-{opacity}";
+
+                PngEncoder encoder = new PngEncoder();
+
+                if (provider.PixelType == PixelTypes.Rgba64)
+                {
+                    encoder.BitDepth = PngBitDepth.Bit16;
+                }
+                
+                image.DebugSave(provider, testInfo, encoder: encoder);
+                image.CompareToReferenceOutput(provider, testInfo);
+            }
+        }
+        
+        
+        [Theory]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 0, 0)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 25, 25)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 75, 50)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, -25, -30)]
+        public void WorksWithDifferentLocations(TestImageProvider<Rgba32> provider, int x, int y)
+        {
+            using (Image<Rgba32> background = provider.GetImage())
+            using (var overlay = new Image<Rgba32>(50, 50))
+            {
+                overlay.Mutate(c => c.Fill(Rgba32.Black));
+
+                background.Mutate(c => c.DrawImage(overlay, new Point(x, y), PixelColorBlendingMode.Normal, 1F));
+
+                background.DebugSave(
+                    provider,
+                    testOutputDetails: $"{x}_{y}",
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
+                
+                background.CompareToReferenceOutput(
+                    provider,
+                    testOutputDetails: $"{x}_{y}",
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
+            }
+        }
+        
+        [Theory]
+        [WithFile(TestImages.Png.Splash, PixelTypes.Rgba32)]
+        public void DrawTransformed<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
+            {
+                AffineTransformBuilder builder = new AffineTransformBuilder()
+                    .AppendRotationDegrees(45F)
+                    .AppendScale(new SizeF(.25F, .25F))
+                    .AppendTranslation(new PointF(10, 10));
+
+                // Apply a background color so we can see the translation.
+                blend.Mutate(x => x.Transform(builder));
+                blend.Mutate(x => x.BackgroundColor(Color.HotPink));
+
+                // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
+                var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
+                image.Mutate(x => x.DrawImage(blend, position,  .75F));
+                
+                image.DebugSave(provider, appendSourceFileOrDescription: false, appendPixelTypeToFileName: false);
+                image.CompareToReferenceOutput(provider, appendSourceFileOrDescription: false, appendPixelTypeToFileName: false);
+            }
+        }
+
+        [Theory]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, -30)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, -30)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, 130, 130)]
+        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32, -30, 130)]
+        public void NonOverlappingImageThrows(TestImageProvider<Rgba32> provider, int x, int y)
+        {
+            using (Image<Rgba32> background = provider.GetImage())
+            using (var overlay = new Image<Rgba32>(Configuration.Default, 10, 10, Rgba32.Black))
+            {
+                ImageProcessingException ex = Assert.Throws<ImageProcessingException>(Test);
+
+                Assert.Contains("does not overlap", ex.ToString());
+
+                void Test()
+                {
+                    background.Mutate(context => context.DrawImage(overlay, new Point(x, y), GraphicsOptions.Default));
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index 6ca3ed6f9f..c5aa1fb944 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -61,7 +61,8 @@ namespace SixLabors.ImageSharp.Tests
             FormattableString testOutputDetails,
             string extension = "png",
             bool appendPixelTypeToFileName = true,
-            bool appendSourceFileOrDescription = true)
+            bool appendSourceFileOrDescription = true,
+            IImageEncoder encoder = null)
             where TPixel : struct, IPixel<TPixel>
         {
             return image.DebugSave(
@@ -69,7 +70,8 @@ namespace SixLabors.ImageSharp.Tests
                 (object)testOutputDetails,
                 extension,
                 appendPixelTypeToFileName,
-                appendSourceFileOrDescription);
+                appendSourceFileOrDescription,
+                encoder);
         }
 
         /// <summary>
@@ -82,13 +84,15 @@ namespace SixLabors.ImageSharp.Tests
         /// <param name="extension">The extension</param>
         /// <param name="appendPixelTypeToFileName">A boolean indicating whether to append the pixel type to the  output file name.</param>
         /// <param name="appendSourceFileOrDescription">A boolean indicating whether to append <see cref="ITestImageProvider.SourceFileOrDescription"/> to the test output file name.</param>
+        /// <param name="encoder">Custom encoder to use.</param>
         public static Image<TPixel> DebugSave<TPixel>(
             this Image<TPixel> image,
             ITestImageProvider provider,
             object testOutputDetails = null,
             string extension = "png",
             bool appendPixelTypeToFileName = true,
-            bool appendSourceFileOrDescription = true)
+            bool appendSourceFileOrDescription = true,
+            IImageEncoder encoder = null)
             where TPixel : struct, IPixel<TPixel>
         {
             if (TestEnvironment.RunsOnCI)
@@ -102,7 +106,8 @@ namespace SixLabors.ImageSharp.Tests
                 extension,
                 testOutputDetails: testOutputDetails,
                 appendPixelTypeToFileName: appendPixelTypeToFileName,
-                appendSourceFileOrDescription: appendSourceFileOrDescription);
+                appendSourceFileOrDescription: appendSourceFileOrDescription,
+                encoder: encoder);
             return image;
         }
 
@@ -255,6 +260,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <param name="grayscale">A boolean indicating whether we should debug save + compare against a grayscale image, smaller in size.</param>
         /// <param name="appendPixelTypeToFileName">A boolean indicating whether to append the pixel type to the  output file name.</param>
         /// <param name="appendSourceFileOrDescription">A boolean indicating whether to append <see cref="ITestImageProvider.SourceFileOrDescription"/> to the test output file name.</param>
+        /// <param name="decoder">A custom decoder.</param>
         /// <returns></returns>
         public static Image<TPixel> CompareToReferenceOutput<TPixel>(
             this Image<TPixel> image,
@@ -264,7 +270,8 @@ namespace SixLabors.ImageSharp.Tests
             string extension = "png",
             bool grayscale = false,
             bool appendPixelTypeToFileName = true,
-            bool appendSourceFileOrDescription = true)
+            bool appendSourceFileOrDescription = true,
+            IImageDecoder decoder = null)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> referenceImage = GetReferenceOutputImage<TPixel>(
@@ -272,7 +279,8 @@ namespace SixLabors.ImageSharp.Tests
                 testOutputDetails,
                 extension,
                 appendPixelTypeToFileName,
-                appendSourceFileOrDescription))
+                appendSourceFileOrDescription,
+                decoder))
             {
                 comparer.VerifySimilarity(referenceImage, image);
             }
@@ -356,7 +364,8 @@ namespace SixLabors.ImageSharp.Tests
                                                                     object testOutputDetails = null,
                                                                     string extension = "png",
                                                                     bool appendPixelTypeToFileName = true,
-                                                                    bool appendSourceFileOrDescription = true)
+                                                                    bool appendSourceFileOrDescription = true,
+                                                                    IImageDecoder decoder = null)
             where TPixel : struct, IPixel<TPixel>
         {
             string referenceOutputFile = provider.Utility.GetReferenceOutputFileName(
@@ -370,7 +379,7 @@ namespace SixLabors.ImageSharp.Tests
                 throw new System.IO.FileNotFoundException("Reference output file missing: " + referenceOutputFile, referenceOutputFile);
             }
 
-            IImageDecoder decoder = TestEnvironment.GetReferenceDecoder(referenceOutputFile);
+            decoder = decoder ?? TestEnvironment.GetReferenceDecoder(referenceOutputFile);
 
             return Image.Load<TPixel>(referenceOutputFile, decoder);
         }
diff --git a/tests/Images/External b/tests/Images/External
index d83843deed..dc5afda9a4 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit d83843deedc43712f29f631aab090640b4f54946
+Subproject commit dc5afda9a4ad69dc3526d49ceb1d27610064f2af

From 5c2832282576aa866419055758b096bcc0647934 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 00:52:35 +0200
Subject: [PATCH 170/223] RecolorImageTests

---
 .../{BeziersTests.cs => DrawBezierTests.cs}   | 10 ++--
 .../Drawing/RecolorImageTest.cs               | 48 -----------------
 .../Drawing/RecolorImageTests.cs              | 51 +++++++++++++++++++
 tests/Images/External                         |  2 +-
 4 files changed, 57 insertions(+), 54 deletions(-)
 rename tests/ImageSharp.Tests/Drawing/{BeziersTests.cs => DrawBezierTests.cs} (93%)
 delete mode 100644 tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
 create mode 100644 tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs

diff --git a/tests/ImageSharp.Tests/Drawing/BeziersTests.cs b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
similarity index 93%
rename from tests/ImageSharp.Tests/Drawing/BeziersTests.cs
rename to tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
index cc8f27f3a2..d82221ca67 100644
--- a/tests/ImageSharp.Tests/Drawing/BeziersTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
@@ -11,13 +11,13 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Drawing
 {
-    public class Beziers : FileTestBase
+    public class DrawBezierTests
     {
         [Fact]
         public void ImageShouldBeOverlayedByBezierLine()
         {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "BezierLine");
-            using (var image = new Image<Rgba32>(500, 500))
+            string path = TestEnvironment.CreateOutputDirectory("Drawing", "DrawBezierTests");
+            using (var image = new Image<Rgba32>(350, 450))
             {
                 image.Mutate(x => x.BackgroundColor(Color.Blue));
                 image.Mutate(
@@ -51,11 +51,11 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         [Fact]
         public void ImageShouldBeOverlayedBezierLineWithOpacity()
         {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "BezierLine");
+            string path = TestEnvironment.CreateOutputDirectory("Drawing", "DrawBezierTests");
 
             var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
 
-            using (var image = new Image<Rgba32>(500, 500))
+            using (var image = new Image<Rgba32>(350, 450))
             {
                 image.Mutate(x => x.BackgroundColor(Color.Blue));
                 image.Mutate(
diff --git a/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs b/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
deleted file mode 100644
index b064d9c964..0000000000
--- a/tests/ImageSharp.Tests/Drawing/RecolorImageTest.cs
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.Primitives;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    public class RecolorImageTest : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldRecolorYellowToHotPink()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "RecolorImage");
-
-            var brush = new RecolorBrush<Rgba32>(Rgba32.Yellow, Rgba32.HotPink, 0.2f);
-
-            foreach (TestFile file in Files)
-            {
-                using (Image<Rgba32> image = file.CreateRgba32Image())
-                {
-                    image.Mutate(x => x.Fill(brush));
-                    image.Save($"{path}/{file.FileName}");
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldRecolorYellowToHotPinkInARectangle()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "RecolorImage");
-
-            var brush = new RecolorBrush<Rgba32>(Rgba32.Yellow, Rgba32.HotPink, 0.2f);
-
-            foreach (TestFile file in Files)
-            {
-                using (Image<Rgba32> image = file.CreateRgba32Image())
-                {
-                    int imageHeight = image.Height;
-                    image.Mutate(x => x.Fill(brush, new Rectangle(0, imageHeight / 2 - imageHeight / 4, image.Width, imageHeight / 2)));
-                    image.Save($"{path}/Shaped_{file.FileName}");
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
new file mode 100644
index 0000000000..cb671a53d4
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
@@ -0,0 +1,51 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.Primitives;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    [GroupOutput("Drawing")]
+    public class RecolorImageTests
+    {
+        [Theory]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, "Yellow", "Pink", 0.2f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Bgra32, "Yellow", "Pink", 0.5f)]
+        [WithTestPatternImages(100, 100, PixelTypes.Rgba32, "Red", "Blue", 0.2f)]
+        [WithTestPatternImages(100, 100, PixelTypes.Rgba32, "Red", "Blue", 0.6f)]
+        public void Recolor<TPixel>(TestImageProvider<TPixel> provider, string sourceColorName, string targetColorName, float threshold)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color sourceColor = TestUtils.GetColorByName(sourceColorName);
+            Color targetColor = TestUtils.GetColorByName(targetColorName);
+            var brush = new RecolorBrush<TPixel>(sourceColor.ToPixel<TPixel>(), targetColor.ToPixel<TPixel>(), threshold);
+
+            FormattableString testInfo = $"{sourceColorName}-{targetColorName}-{threshold}";
+            provider.RunValidatingProcessorTest(x => x.Fill(brush), testInfo);
+        }
+        
+        [Theory]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Bgra32, "Yellow", "Pink", 0.5f)]
+        [WithTestPatternImages(100, 100, PixelTypes.Rgba32, "Red", "Blue", 0.2f)]
+        public void Recolor_InBox<TPixel>(TestImageProvider<TPixel> provider, string sourceColorName, string targetColorName, float threshold)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color sourceColor = TestUtils.GetColorByName(sourceColorName);
+            Color targetColor = TestUtils.GetColorByName(targetColorName);
+            var brush = new RecolorBrush<TPixel>(sourceColor.ToPixel<TPixel>(), targetColor.ToPixel<TPixel>(), threshold);
+
+            FormattableString testInfo = $"{sourceColorName}-{targetColorName}-{threshold}";
+            provider.RunValidatingProcessorTest(x =>
+                {
+                    Size size = x.GetCurrentSize();
+                    var rectangle = new Rectangle(0, size.Height / 2 - size.Height / 4, size.Width, size.Height / 2);
+                    x.Fill(brush, rectangle);
+                }, testInfo);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index dc5afda9a4..5036d47ec2 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit dc5afda9a4ad69dc3526d49ceb1d27610064f2af
+Subproject commit 5036d47ec2393d90efb6f3864d828e2e4381947f

From ba92b1c755c27d065572c78de6eac6b679a2a60d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 02:34:48 +0200
Subject: [PATCH 171/223] FillPolygonTests

---
 src/ImageSharp/Color/Color.Conversions.cs     |  14 +
 src/ImageSharp/Color/Color.cs                 |  12 +
 tests/ImageSharp.Tests/Color/ColorTests.cs    |  11 +
 .../Drawing/FillPolygonTests.cs               | 155 +++++++++++
 .../Drawing/RecolorImageTests.cs              |   3 +-
 .../Drawing/SolidPolygonTests.cs              | 240 ------------------
 tests/Images/External                         |   2 +-
 7 files changed, 195 insertions(+), 242 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs

diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
index 001aee5a4f..20dca67706 100644
--- a/src/ImageSharp/Color/Color.Conversions.cs
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -117,6 +117,13 @@ namespace SixLabors.ImageSharp
         /// <returns>The <see cref="Color"/>.</returns>
         public static implicit operator Color(Bgr24 source) => new Color(source);
 
+        /// <summary>
+        /// Converts an <see cref="Vector4"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Vector4"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        public static explicit operator Color(Vector4 source) => new Color(source);
+
         /// <summary>
         /// Converts a <see cref="Color"/> to <see cref="Rgba64"/>.
         /// </summary>
@@ -158,5 +165,12 @@ namespace SixLabors.ImageSharp
         /// <param name="color">The <see cref="Color"/>.</param>
         /// <returns>The <see cref="Bgr24"/>.</returns>
         public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Vector4"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Vector4"/>.</returns>
+        public static explicit operator Vector4(Color color) => color.data.ToVector4();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index f2f8578d83..fe35033147 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -94,6 +94,18 @@ namespace SixLabors.ImageSharp
             return new Color(rgba);
         }
 
+        /// <summary>
+        /// Alters the alpha channel of the color, returning a new instance.
+        /// </summary>
+        /// <param name="alpha">The new value of alpha [0..1].</param>
+        /// <returns>The color having it's alpha channel altered.</returns>
+        public Color WithAlpha(float alpha)
+        {
+            Vector4 v = (Vector4)this;
+            v.W = alpha;
+            return new Color(v);
+        }
+
         /// <summary>
         /// Gets the hexadecimal representation of the color instance in rrggbbaa form.
         /// </summary>
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.cs b/tests/ImageSharp.Tests/Color/ColorTests.cs
index 729ef94e3c..e9e22ccdd9 100644
--- a/tests/ImageSharp.Tests/Color/ColorTests.cs
+++ b/tests/ImageSharp.Tests/Color/ColorTests.cs
@@ -13,6 +13,17 @@ namespace SixLabors.ImageSharp.Tests
 {
     public partial class ColorTests
     {
+        [Fact]
+        public void WithAlpha()
+        {
+            Color c1 = Color.FromRgba(111, 222, 55, 255);
+            Color c2 = c1.WithAlpha(0.5f);
+
+            Rgba32 expected = new Rgba32(111, 222, 55, 128);
+            
+            Assert.Equal(expected, (Rgba32)c2);
+        }
+        
         [Fact]
         public void Equality_WhenTrue()
         {
diff --git a/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
new file mode 100644
index 0000000000..43029e6957
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
@@ -0,0 +1,155 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.Shapes;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class FillPolygonTests
+    {
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 0.6f, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Bgr24, "Yellow", 1f, true)]
+        public void FillPolygon_Solid<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            SixLabors.Primitives.PointF[] simplePath =
+                {
+                    new Vector2(10, 10), new Vector2(200, 150), new Vector2(50, 300)
+                };
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            
+            GraphicsOptions options = new GraphicsOptions(antialias);
+
+            string aa = antialias ? "" : "_NoAntialias";
+            FormattableString outputDetails = $"{colorName}_A{alpha}{aa}";
+            
+            provider.RunValidatingProcessorTest(
+                c => c.FillPolygon(options, color.ToPixel<TPixel>(), simplePath),
+                outputDetails,
+                appendSourceFileOrDescription: false);
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32)]
+        public void FillPolygon_Concave<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var points = new SixLabors.Primitives.PointF[]
+                             {
+                                 new Vector2(8, 8), 
+                                 new Vector2(64, 8), 
+                                 new Vector2(64, 64), 
+                                 new Vector2(120, 64),
+                                 new Vector2(120, 120), 
+                                 new Vector2(8, 120)
+                             };
+                
+            Color color = Color.LightGreen;
+
+            provider.RunValidatingProcessorTest(
+                c => c.FillPolygon(color.ToPixel<TPixel>(), points),
+                appendSourceFileOrDescription: false,
+                appendPixelTypeToFileName: false);
+        }
+
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32)]
+        public void FillPolygon_Pattern<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            SixLabors.Primitives.PointF[] simplePath =
+                {
+                    new Vector2(10, 10), new Vector2(200, 150), new Vector2(50, 300)
+                };
+            Color color = Color.Yellow;
+
+            var brush = Brushes.Horizontal(color.ToPixel<TPixel>());
+            
+            provider.RunValidatingProcessorTest(
+                c => c.FillPolygon(brush, simplePath),
+                appendSourceFileOrDescription: false);
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, TestImages.Png.Ducky)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, TestImages.Bmp.Car)]
+        public void FillPolygon_ImageBrush<TPixel>(TestImageProvider<TPixel> provider, string brushImageName)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            SixLabors.Primitives.PointF[] simplePath =
+                {
+                    new Vector2(10, 10), new Vector2(200, 50), new Vector2(50, 200)
+                };
+
+            using (Image<TPixel> brushImage = Image.Load<TPixel>(TestFile.Create(brushImageName).Bytes))
+            {
+                var brush = new ImageBrush<TPixel>(brushImage);
+                
+                provider.RunValidatingProcessorTest(
+                    c => c.FillPolygon(brush, simplePath),
+                    System.IO.Path.GetFileNameWithoutExtension(brushImageName),
+                    appendSourceFileOrDescription: false);
+            }
+        }
+
+        [Theory]
+        [WithBasicTestPatternImages(250, 250, PixelTypes.Rgba32)]
+        public void Fill_RectangularPolygon<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var polygon = new SixLabors.Shapes.RectangularPolygon(10, 10, 190, 140);
+            Color color = Color.White;
+
+            provider.RunValidatingProcessorTest(
+                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                appendSourceFileOrDescription: false);    
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32, 3, 50, 0f)]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32, 3, 60, 20f)]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32, 3, 60, -180f)]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32, 5, 70, 0f)]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32, 7, 80, -180f)]
+        public void Fill_RegularPolygon<TPixel>(TestImageProvider<TPixel> provider, int vertices, float radius, float angleDeg)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            float angle = GeometryUtilities.DegreeToRadian(angleDeg);
+            var polygon = new RegularPolygon(100, 100, vertices, radius, angle);
+            Color color = Color.Yellow;
+
+            FormattableString testOutput = $"V({vertices})_R({radius})_Ang({angleDeg})";
+            provider.RunValidatingProcessorTest(
+                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                testOutput,
+                appendSourceFileOrDescription: false,
+                appendPixelTypeToFileName: false);
+        }
+
+        [Theory]
+        [WithBasicTestPatternImages(200, 200, PixelTypes.Rgba32)]
+        public void Fill_EllipsePolygon<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            var polygon = new EllipsePolygon(100, 100, 80, 120);
+            Color color = Color.Azure;
+
+            provider.RunValidatingProcessorTest(
+                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                appendSourceFileOrDescription: false,
+                appendPixelTypeToFileName: false);
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
index cb671a53d4..461ca700f7 100644
--- a/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
@@ -6,9 +6,10 @@ using System;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.Primitives;
+
 using Xunit;
 
-namespace SixLabors.ImageSharp.Tests
+namespace SixLabors.ImageSharp.Tests.Drawing
 {
     [GroupOutput("Drawing")]
     public class RecolorImageTests
diff --git a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
deleted file mode 100644
index 6a299aad7b..0000000000
--- a/tests/ImageSharp.Tests/Drawing/SolidPolygonTests.cs
+++ /dev/null
@@ -1,240 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Numerics;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.Shapes;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Drawing
-{
-    public class SolidPolygonTests : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledPolygon()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-            SixLabors.Primitives.PointF[] simplePath = {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.FillPolygon(new GraphicsOptions(true), Rgba32.HotPink, simplePath));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[81, 145]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledPolygonWithPattern()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-            var simplePath = new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(
-                    x => x.FillPolygon(new GraphicsOptions(true), Brushes.Horizontal(Rgba32.HotPink), simplePath));
-                image.Save($"{path}/Pattern.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[81, 145]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledPolygonNoAntialias()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-            var simplePath = new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.FillPolygon(
-                        new GraphicsOptions(false),
-                        Rgba32.HotPink,
-                        simplePath));
-                image.Save($"{path}/Simple_NoAntialias.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.True(Rgba32.HotPink == sourcePixels[11, 11], "[11, 11] wrong");
-
-                Assert.True(Rgba32.HotPink == sourcePixels[199, 149], "[199, 149] wrong");
-
-                Assert.True(Rgba32.HotPink == sourcePixels[50, 50], "[50, 50] wrong");
-
-                Assert.True(Rgba32.Blue == sourcePixels[2, 2], "[2, 2] wrong");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledPolygonImage()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-            var simplePath = new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-
-            using (Image<Rgba32> brushImage = TestFile.Create(TestImages.Bmp.Car).CreateRgba32Image())
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                var brush = new ImageBrush<Rgba32>(brushImage);
-
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.FillPolygon(brush, simplePath));
-                image.Save($"{path}/Image.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledPolygonOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-            var simplePath = new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.FillPolygon(color, simplePath));
-                image.Save($"{path}/Opacity.png");
-
-                //shift background color towards forground color by the opacity amount
-                var mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledRectangle()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.Fill(
-                        Rgba32.HotPink,
-                        new SixLabors.Shapes.RectangularPolygon(10, 10, 190, 140)));
-                image.Save($"{path}/Rectangle.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[11, 11]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[198, 10]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 50]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[50, 50]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledTriangle()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-
-            using (var image = new Image<Rgba32>(100, 100))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.Fill(Rgba32.HotPink, new RegularPolygon(50, 50, 3, 30)));
-                image.Save($"{path}/Triangle.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.Blue, sourcePixels[30, 65]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[50, 50]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledSeptagon()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-
-            var config = Configuration.CreateDefaultInstance();
-            config.MaxDegreeOfParallelism = 1;
-            using (var image = new Image<Rgba32>(config, 100, 100))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Fill(Rgba32.HotPink, 
-                    new RegularPolygon(50, 50, 7, 30, -(float)Math.PI)));
-                image.Save($"{path}/Septagon.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByFilledEllipse()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-
-            var config = Configuration.CreateDefaultInstance();
-            config.MaxDegreeOfParallelism = 1;
-            using (var image = new Image<Rgba32>(config, 100, 100))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x
-                    .Fill(Rgba32.HotPink, new EllipsePolygon(50, 50, 30, 50)
-                    .Rotate((float)(Math.PI / 3))));
-                image.Save($"{path}/ellipse.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedBySquareWithCornerClipped()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "FilledPolygons");
-
-            var config = Configuration.CreateDefaultInstance();
-            config.MaxDegreeOfParallelism = 1;
-            using (var image = new Image<Rgba32>(config, 200, 200))
-            {
-                image.Mutate(x => x
-                    .Fill(Rgba32.Blue)
-                    .FillPolygon(Rgba32.HotPink, new SixLabors.Primitives.PointF[]
-                    {
-                            new Vector2( 8, 8 ),
-                            new Vector2( 64, 8 ),
-                            new Vector2( 64, 64 ),
-                            new Vector2( 120, 64 ),
-                            new Vector2( 120, 120 ),
-                            new Vector2( 8, 120 )
-                    }));
-                image.Save($"{path}/clipped-corner.png");
-            }
-        }
-    }
-}
diff --git a/tests/Images/External b/tests/Images/External
index 5036d47ec2..0edeb078b9 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 5036d47ec2393d90efb6f3864d828e2e4381947f
+Subproject commit 0edeb078b9d9f9c8be016ca514a3a625c4768bd6

From 012ae224556b6841d2e5420c03aeb7af50cef5f1 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 03:00:05 +0200
Subject: [PATCH 172/223] DrawPolygonTests, DrawLinesTests

---
 .../Drawing/DrawLinesTests.cs                 | 100 +++++++++
 .../Drawing/DrawPolygonTests.cs               |  43 ++++
 tests/ImageSharp.Tests/Drawing/LineTests.cs   | 193 ------------------
 .../ImageSharp.Tests/Drawing/PolygonTests.cs  | 102 ---------
 tests/Images/External                         |   2 +-
 5 files changed, 144 insertions(+), 296 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
 create mode 100644 tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Drawing/LineTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Drawing/PolygonTests.cs

diff --git a/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs b/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
new file mode 100644
index 0000000000..c225b921e6
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
@@ -0,0 +1,100 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class DrawLinesTests
+    {
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, 2.5, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 0.6f, 10, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, 5, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Bgr24, "Yellow", 1f, 10, true)]
+        public void DrawLines_Simple<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            Pen<TPixel> pen = new Pen<TPixel>(color.ToPixel<TPixel>(), thickness);
+            
+            DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, 5, false)]
+        public void DrawLines_Dash<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            Pen<TPixel> pen = Pens.Dash(color.ToPixel<TPixel>(), thickness);
+            
+            DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "LightGreen", 1f, 5, false)]
+        public void DrawLines_Dot<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            Pen<TPixel> pen = Pens.Dot(color.ToPixel<TPixel>(), thickness);
+            
+            DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
+        }
+        
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "Yellow", 1f, 5, false)]
+        public void DrawLines_DashDot<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            Pen<TPixel> pen = Pens.DashDot(color.ToPixel<TPixel>(), thickness);
+            
+            DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
+        }
+
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "Black", 1f, 5, false)]
+        public void DrawLines_DashDotDot<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            Pen<TPixel> pen = Pens.DashDotDot(color.ToPixel<TPixel>(), thickness);
+            
+            DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
+        }
+
+        
+        private static void DrawLinesImpl<TPixel>(
+            TestImageProvider<TPixel> provider,
+            string colorName,
+            float alpha,
+            float thickness,
+            bool antialias,
+            Pen<TPixel> pen)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            SixLabors.Primitives.PointF[] simplePath = { new Vector2(10, 10), new Vector2(200, 150), new Vector2(50, 300) };
+
+            GraphicsOptions options = new GraphicsOptions(antialias);
+
+            string aa = antialias ? "" : "_NoAntialias";
+            FormattableString outputDetails = $"{colorName}_A({alpha})_T({thickness}){aa}";
+
+            provider.RunValidatingProcessorTest(
+                c => c.DrawLines(options, pen, simplePath),
+                outputDetails,
+                appendSourceFileOrDescription: false);
+        }
+
+    }
+}
diff --git a/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
new file mode 100644
index 0000000000..8a0f256670
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
@@ -0,0 +1,43 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Numerics;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+using SixLabors.ImageSharp.Processing;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class DrawPolygonTests
+    {
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, 2.5, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 0.6f, 10, true)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, "White", 1f, 5, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Bgr24, "Yellow", 1f, 10, true)]
+        public void DrawPolygon<TPixel>(TestImageProvider<TPixel> provider, string colorName, float alpha, float thickness, bool antialias)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            SixLabors.Primitives.PointF[] simplePath =
+                {
+                    new Vector2(10, 10), new Vector2(200, 150), new Vector2(50, 300)
+                };
+            Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
+            
+            GraphicsOptions options = new GraphicsOptions(antialias);
+
+            string aa = antialias ? "" : "_NoAntialias";
+            FormattableString outputDetails = $"{colorName}_A({alpha})_T({thickness}){aa}";
+            
+            provider.RunValidatingProcessorTest(
+                c => c.DrawPolygon(options, color.ToPixel<TPixel>(), thickness, simplePath),
+                outputDetails,
+                appendSourceFileOrDescription: false);
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/LineTests.cs b/tests/ImageSharp.Tests/Drawing/LineTests.cs
deleted file mode 100644
index 1cc0fd1a40..0000000000
--- a/tests/ImageSharp.Tests/Drawing/LineTests.cs
+++ /dev/null
@@ -1,193 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Numerics;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Drawing
-{
-    public class LineTests : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldBeOverlayedByPath()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.DrawLines(
-                        Rgba32.HotPink,
-                        5,
-                        new Vector2(10, 10),
-                        new Vector2(200, 150),
-                        new Vector2(50, 300)));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[11, 11]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPath_NoAntialias()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.DrawLines(
-                        new GraphicsOptions(false),
-                        Rgba32.HotPink,
-                        5,
-                        new Vector2(10, 10),
-                        new Vector2(200, 150),
-                        new Vector2(50, 300)));
-                image.Save($"{path}/Simple_noantialias.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[11, 11]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPathDashed()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.DrawLines(Pens.Dash(Rgba32.HotPink, 5),
-                    new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-                    }));
-                image.Save($"{path}/Dashed.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPathDotted()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.DrawLines(Pens.Dot(Rgba32.HotPink, 5),
-                    new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-                    }));
-                image.Save($"{path}/Dot.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPathDashDot()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.DrawLines(Pens.DashDot(Rgba32.HotPink, 5),
-                    new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-                    }));
-                image.Save($"{path}/DashDot.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPathDashDotDot()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-            var image = new Image<Rgba32>(500, 500);
-
-            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-            image.Mutate(x => x.DrawLines(Pens.DashDotDot(Rgba32.HotPink, 5), 
-                new SixLabors.Primitives.PointF[] {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-                }));
-            image.Save($"{path}/DashDotDot.png");
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedPathWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            var image = new Image<Rgba32>(500, 500);
-
-            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-            image.Mutate(
-                x => x.DrawLines(
-                    color,
-                    10,
-                    new Vector2(10, 10),
-                    new Vector2(200, 150),
-                    new Vector2(50, 300)));
-            image.Save($"{path}/Opacity.png");
-
-            //shift background color towards forground color by the opacity amount
-            var mergedColor =
-                new Rgba32(Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-            Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-            Assert.Equal(mergedColor, sourcePixels[11, 11]);
-
-            Assert.Equal(mergedColor, sourcePixels[199, 149]);
-
-            Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPathOutline()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Lines");
-
-            var image = new Image<Rgba32>(500, 500);
-
-            image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-            image.Mutate(
-                x => x.DrawLines(
-                    Rgba32.HotPink,
-                    10,
-                    new Vector2(10, 10),
-                    new Vector2(200, 10),
-                    new Vector2(200, 150),
-                    new Vector2(10, 150)));
-            image.Save($"{path}/Rectangle.png");
-
-            Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-            Assert.Equal(Rgba32.HotPink, sourcePixels[11, 11]);
-
-            Assert.Equal(Rgba32.HotPink, sourcePixels[198, 10]);
-
-            Assert.Equal(Rgba32.Blue, sourcePixels[10, 50]);
-
-            Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-        }
-    }
-}
diff --git a/tests/ImageSharp.Tests/Drawing/PolygonTests.cs b/tests/ImageSharp.Tests/Drawing/PolygonTests.cs
deleted file mode 100644
index febb39c20d..0000000000
--- a/tests/ImageSharp.Tests/Drawing/PolygonTests.cs
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Numerics;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
-using SixLabors.ImageSharp.Processing;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Drawing
-{
-    public class PolygonTests : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutline()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Polygons");
-
-            using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.DrawPolygon(
-                        Rgba32.HotPink,
-                        5,
-                        new Vector2(10, 10),
-                        new Vector2(200, 150),
-                        new Vector2(50, 300)));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[9, 9]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedPolygonOutlineWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Polygons");
-            PointF[] simplePath = {
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)
-            };
-
-            Rgba32 color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.DrawPolygon(color, 10, simplePath));
-                image.Save($"{path}/Opacity.png");
-
-                //shift background color towards forground color by the opacity amount
-                Rgba32 mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(mergedColor, sourcePixels[9, 9]);
-
-                Assert.Equal(mergedColor, sourcePixels[199, 149]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByRectangleOutline()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "Polygons");
-
-            using (Image<Rgba32> image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(
-                    x => x.Draw(Rgba32.HotPink, 10, new Rectangle(10, 10, 190, 140)));
-                image.Save($"{path}/Rectangle.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[8, 8]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[198, 10]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 50]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[50, 50]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/Images/External b/tests/Images/External
index 0edeb078b9..4fe9334aa8 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 0edeb078b9d9f9c8be016ca514a3a625c4768bd6
+Subproject commit 4fe9334aa8898f67b6e3df94bc00867645c3e709

From 70772214f54cc2e54e11e8f5865d8a1c777b662a Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 03:22:21 +0200
Subject: [PATCH 173/223] DrawBeziersTests, DrawComplexPolygonTests

---
 .../Drawing/DrawBezierTests.cs                | 102 +++------
 .../Drawing/DrawComplexPolygonTests.cs        |  70 ++++++
 .../Drawing/LineComplexPolygonTests.cs        | 201 ------------------
 tests/Images/External                         |   2 +-
 4 files changed, 100 insertions(+), 275 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs

diff --git a/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
index d82221ca67..0f29728c9f 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Numerics;
 
 using SixLabors.ImageSharp.Memory;
@@ -11,82 +12,37 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Drawing
 {
+    [GroupOutput("Drawing")]
     public class DrawBezierTests
     {
-        [Fact]
-        public void ImageShouldBeOverlayedByBezierLine()
+        public static readonly TheoryData<string, byte, float> DrawPathData = new TheoryData<string, byte, float>
+                                                                                  {
+                                                                                      { "White", 255, 1.5f },
+                                                                                      { "Red", 255, 3 },
+                                                                                      { "HotPink", 255, 5 },
+                                                                                      { "HotPink", 150, 5 },
+                                                                                      { "White", 255, 15 },
+                                                                                  };
+
+        [Theory]
+        [WithSolidFilledImages(nameof(DrawPathData), 300, 450, "Blue", PixelTypes.Rgba32)]
+        public void DrawBeziers<TPixel>(TestImageProvider<TPixel> provider, string colorName, byte alpha, float thickness)
+            where TPixel : struct, IPixel<TPixel>
         {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "DrawBezierTests");
-            using (var image = new Image<Rgba32>(350, 450))
-            {
-                image.Mutate(x => x.BackgroundColor(Color.Blue));
-                image.Mutate(
-                    x => x.DrawBeziers(
-                        Rgba32.HotPink,
-                        5,
-                        new SixLabors.Primitives.PointF[]
-                            {
-                                new Vector2(10, 400), new Vector2(30, 10), new Vector2(240, 30), new Vector2(300, 400)
-                            }));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                //top of curve
-                Assert.Equal(Rgba32.HotPink, sourcePixels[138, 115]);
-
-                //start points
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 395]);
-                Assert.Equal(Rgba32.HotPink, sourcePixels[300, 395]);
-
-                //curve points should not be never be set
-                Assert.Equal(Rgba32.Blue, sourcePixels[30, 10]);
-                Assert.Equal(Rgba32.Blue, sourcePixels[240, 30]);
-
-                // inside shape should be empty
-                Assert.Equal(Rgba32.Blue, sourcePixels[200, 250]);
-            }
-        }
-
-
-        [Fact]
-        public void ImageShouldBeOverlayedBezierLineWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "DrawBezierTests");
-
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            using (var image = new Image<Rgba32>(350, 450))
-            {
-                image.Mutate(x => x.BackgroundColor(Color.Blue));
-                image.Mutate(
-                    x => x.DrawBeziers(
-                        color,
-                        10,
-                        new SixLabors.Primitives.PointF[]
-                            {
-                                new Vector2(10, 400), new Vector2(30, 10), new Vector2(240, 30), new Vector2(300, 400)
-                            }));
-                image.Save($"{path}/Opacity.png");
-
-                //shift background color towards foreground color by the opacity amount
-                var mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                // top of curve
-                Assert.Equal(mergedColor, sourcePixels[138, 115]);
-
-                // start points
-                Assert.Equal(mergedColor, sourcePixels[10, 395]);
-                Assert.Equal(mergedColor, sourcePixels[300, 395]);
-
-                // curve points should not be never be set
-                Assert.Equal(Rgba32.Blue, sourcePixels[30, 10]);
-                Assert.Equal(Rgba32.Blue, sourcePixels[240, 30]);
-
-                // inside shape should be empty
-                Assert.Equal(Rgba32.Blue, sourcePixels[200, 250]);
-            }
+            var points = new SixLabors.Primitives.PointF[]
+                             {
+                                 new Vector2(10, 400), new Vector2(30, 10), new Vector2(240, 30), new Vector2(300, 400)
+                             };
+            Rgba32 rgba = TestUtils.GetColorByName(colorName);
+            rgba.A = alpha;
+            Color color = rgba;
+
+            FormattableString testDetails = $"{colorName}_A{alpha}_T{thickness}";
+            
+            provider.RunValidatingProcessorTest( x => x.DrawBeziers(color.ToPixel<TPixel>(), 5f, points), 
+                testDetails,
+                appendSourceFileOrDescription: false,
+                appendPixelTypeToFileName: false);
         }
     }
 }
diff --git a/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
new file mode 100644
index 0000000000..b6e105a199
--- /dev/null
+++ b/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
@@ -0,0 +1,70 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.Numerics;
+
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.Shapes;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Drawing
+{
+    [GroupOutput("Drawing")]
+    public class DrawComplexPolygonTests
+    {
+        [Theory]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, false, false, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, true, false, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, false, true, false)]
+        [WithBasicTestPatternImages(250, 350, PixelTypes.Rgba32, false, false, true)]
+        public void DrawComplexPolygon<TPixel>(TestImageProvider<TPixel> provider, bool overlap, bool transparent, bool dashed)
+            where TPixel :struct, IPixel<TPixel>
+        {
+            var simplePath = new Polygon(new LinearLineSegment(
+                new Vector2(10, 10),
+                new Vector2(200, 150),
+                new Vector2(50, 300)));
+
+            var hole1 = new Polygon(new LinearLineSegment(
+                new Vector2(37, 85),
+                overlap ? new Vector2(130, 40) : new Vector2(93, 85),
+                new Vector2(65, 137)));
+            IPath clipped = simplePath.Clip(hole1);
+
+            Rgba32 colorRgba = Rgba32.White;
+            if (transparent)
+            {
+                colorRgba.A = 150;
+            }
+
+            Color color = colorRgba;
+
+            string testDetails = "";
+            if (overlap)
+            {
+                testDetails += "_Overlap";
+            }
+
+            if (transparent)
+            {
+                testDetails += "_Transparent";
+            }
+
+            if (dashed)
+            {
+                testDetails += "_Dashed";
+            }
+
+            Pen<TPixel> pen = dashed ? Pens.Dash(color.ToPixel<TPixel>(), 5f) : Pens.Solid(color.ToPixel<TPixel>(), 5f);
+
+            provider.RunValidatingProcessorTest(
+                x => x.Draw(pen, clipped),
+                testDetails,
+                appendPixelTypeToFileName: false,
+                appendSourceFileOrDescription: false);
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs
deleted file mode 100644
index 06961bec4b..0000000000
--- a/tests/ImageSharp.Tests/Drawing/LineComplexPolygonTests.cs
+++ /dev/null
@@ -1,201 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Numerics;
-
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.Shapes;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Drawing
-{
-    public class LineComplexPolygonTests : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutline()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "LineComplexPolygon");
-
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(93, 85),
-                            new Vector2(65, 137)));
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
-                image.Save($"{path}/Simple.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 10]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[200, 150]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[50, 300]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[37, 85]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[93, 85]);
-
-                Assert.Equal(Rgba32.HotPink, sourcePixels[65, 137]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[57, 99]);
-
-                //inside shape
-                Assert.Equal(Rgba32.Blue, sourcePixels[100, 192]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutlineNoOverlapping()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "LineComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(207, 25),
-                            new Vector2(263, 25),
-                            new Vector2(235, 57)));
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
-                image.Save($"{path}/SimpleVanishHole.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 10]);
-                Assert.Equal(Rgba32.HotPink, sourcePixels[200, 150]);
-                Assert.Equal(Rgba32.HotPink, sourcePixels[50, 300]);
-
-                //Assert.Equal(Color.HotPink, sourcePixels[37, 85]);
-
-                //Assert.Equal(Color.HotPink, sourcePixels[93, 85]);
-
-                //Assert.Equal(Color.HotPink, sourcePixels[65, 137]);
-
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[57, 99]);
-
-                //inside shape
-                Assert.Equal(Rgba32.Blue, sourcePixels[100, 192]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutlineOverlapping()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "LineComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(130, 40),
-                            new Vector2(65, 137)));
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(Rgba32.HotPink, 5, simplePath.Clip(hole1)));
-                image.Save($"{path}/SimpleOverlapping.png");
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(Rgba32.HotPink, sourcePixels[10, 10]);
-                Assert.Equal(Rgba32.HotPink, sourcePixels[200, 150]);
-                Assert.Equal(Rgba32.HotPink, sourcePixels[50, 300]);
-                Assert.Equal(Rgba32.Blue, sourcePixels[130, 41]);
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[57, 99]);
-
-                //inside shape
-                Assert.Equal(Rgba32.Blue, sourcePixels[100, 192]);
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedByPolygonOutlineDashed()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "LineComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(93, 85),
-                            new Vector2(65, 137)));
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(Pens.Dash(Rgba32.HotPink, 5), simplePath.Clip(hole1)));
-                image.Save($"{path}/Dashed.png");
-            }
-        }
-
-        [Fact]
-        public void ImageShouldBeOverlayedPolygonOutlineWithOpacity()
-        {
-            string path = TestEnvironment.CreateOutputDirectory("Drawing", "LineComplexPolygon");
-            var simplePath = new Polygon(new LinearLineSegment(
-                            new Vector2(10, 10),
-                            new Vector2(200, 150),
-                            new Vector2(50, 300)));
-
-            var hole1 = new Polygon(new LinearLineSegment(
-                            new Vector2(37, 85),
-                            new Vector2(93, 85),
-                            new Vector2(65, 137)));
-            var color = new Rgba32(Rgba32.HotPink.R, Rgba32.HotPink.G, Rgba32.HotPink.B, 150);
-
-            using (var image = new Image<Rgba32>(500, 500))
-            {
-                image.Mutate(x => x.BackgroundColor(Rgba32.Blue));
-                image.Mutate(x => x.Draw(color, 5, simplePath.Clip(hole1)));
-                image.Save($"{path}/Opacity.png");
-
-                //shift background color towards forground color by the opacity amount
-                var mergedColor = new Rgba32(
-                    Vector4.Lerp(Rgba32.Blue.ToVector4(), Rgba32.HotPink.ToVector4(), 150f / 255f));
-
-                Buffer2D<Rgba32> sourcePixels = image.GetRootFramePixelBuffer();
-                Assert.Equal(mergedColor, sourcePixels[10, 10]);
-                Assert.Equal(mergedColor, sourcePixels[200, 150]);
-                Assert.Equal(mergedColor, sourcePixels[50, 300]);
-                Assert.Equal(mergedColor, sourcePixels[37, 85]);
-                Assert.Equal(mergedColor, sourcePixels[93, 85]);
-                Assert.Equal(mergedColor, sourcePixels[65, 137]);
-                Assert.Equal(Rgba32.Blue, sourcePixels[2, 2]);
-
-                //inside hole
-                Assert.Equal(Rgba32.Blue, sourcePixels[57, 99]);
-
-                //inside shape
-                Assert.Equal(Rgba32.Blue, sourcePixels[100, 192]);
-            }
-        }
-    }
-}
diff --git a/tests/Images/External b/tests/Images/External
index 4fe9334aa8..55c250ab80 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 4fe9334aa8898f67b6e3df94bc00867645c3e709
+Subproject commit 55c250ab80f7f9fc26208b9b9d9590cbe8012446

From b90fbc1f6b33e22e40f3cb0f1d2c50fc2bda72ea Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 13:39:10 +0200
Subject: [PATCH 174/223] move implicit Color conversion to pixel types,

add micro-optimizations
---
 ImageSharp.sln.DotSettings                    |   1 +
 src/ImageSharp/Color/Color.Conversions.cs     | 133 ++++--------------
 src/ImageSharp/Color/Color.cs                 |  39 ++++-
 .../PixelImplementations/Argb32.cs            |  16 +++
 .../PixelImplementations/Bgr24.cs             |  16 +++
 .../PixelImplementations/Bgra32.cs            |  16 +++
 .../PixelImplementations/Rgb24.cs             |  16 +++
 .../PixelImplementations/Rgba32.cs            |  16 +++
 .../PixelImplementations/Rgba64.cs            |  23 +++
 tests/ImageSharp.Tests/Color/ColorTests.cs    |   2 +
 10 files changed, 165 insertions(+), 113 deletions(-)

diff --git a/ImageSharp.sln.DotSettings b/ImageSharp.sln.DotSettings
index 5268172429..ece3dddb3c 100644
--- a/ImageSharp.sln.DotSettings
+++ b/ImageSharp.sln.DotSettings
@@ -388,5 +388,6 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateBlankLinesAroundFieldToBlankLinesAroundProperty/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateThisQualifierSettings/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Bgra/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Quantizer/@EntryIndexedValue">True</s:Boolean>
 </wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
index 001aee5a4f..a524b9db1b 100644
--- a/src/ImageSharp/Color/Color.Conversions.cs
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Numerics;
+using System.Runtime.CompilerServices;
 
 using SixLabors.ImageSharp.PixelFormats;
 
@@ -16,147 +17,67 @@ namespace SixLabors.ImageSharp
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Rgba64"/> containing the color information.</param>
-        public Color(Rgba64 pixel)
-        {
-            this.data = pixel;
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Rgba64 pixel) => this.data = pixel;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Rgba32"/> containing the color information.</param>
-        public Color(Rgba32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Rgba32 pixel) => this.data = new Rgba64(pixel);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Argb32"/> containing the color information.</param>
-        public Color(Argb32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Argb32 pixel) => this.data = new Rgba64(pixel);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Bgra32"/> containing the color information.</param>
-        public Color(Bgra32 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Bgra32 pixel) => this.data = new Rgba64(pixel);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Rgb24"/> containing the color information.</param>
-        public Color(Rgb24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Rgb24 pixel) => this.data = new Rgba64(pixel);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="pixel">The <see cref="Bgr24"/> containing the color information.</param>
-        public Color(Bgr24 pixel)
-        {
-            this.data = new Rgba64(pixel);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Bgr24 pixel) => this.data = new Rgba64(pixel);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Color"/> struct.
         /// </summary>
         /// <param name="vector">The <see cref="Vector4"/> containing the color information.</param>
-        public Color(Vector4 vector)
-        {
-            this.data = new Rgba64(vector);
-        }
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public Color(Vector4 vector) => this.data = new Rgba64(vector);
 
-        /// <summary>
-        /// Converts an <see cref="Rgba64"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Rgba64"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Rgba64 source) => new Color(source);
-
-        /// <summary>
-        /// Converts an <see cref="Rgba32"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Rgba32"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Rgba32 source) => new Color(source);
-
-        /// <summary>
-        /// Converts an <see cref="Bgra32"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Bgra32"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Bgra32 source) => new Color(source);
-
-        /// <summary>
-        /// Converts an <see cref="Argb32"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Argb32"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Argb32 source) => new Color(source);
-
-        /// <summary>
-        /// Converts an <see cref="Rgb24"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Rgb24"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Rgb24 source) => new Color(source);
-
-        /// <summary>
-        /// Converts an <see cref="Bgr24"/> to <see cref="Color"/>.
-        /// </summary>
-        /// <param name="source">The <see cref="Bgr24"/>.</param>
-        /// <returns>The <see cref="Color"/>.</returns>
-        public static implicit operator Color(Bgr24 source) => new Color(source);
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Rgba64 ToRgba64() => this.data;
 
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Rgba64"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Rgba64"/>.</returns>
-        public static implicit operator Rgba64(Color color) => color.data;
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Rgba32 ToRgba32() => this.data.ToRgba32();
 
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Rgba32"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Rgba32"/>.</returns>
-        public static implicit operator Rgba32(Color color) => color.data.ToRgba32();
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Bgra32 ToBgra32() => this.data.ToBgra32();
 
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Bgra32"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Bgra32"/>.</returns>
-        public static implicit operator Bgra32(Color color) => color.data.ToBgra32();
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Argb32 ToArgb32() => this.data.ToArgb32();
 
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Argb32"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Argb32"/>.</returns>
-        public static implicit operator Argb32(Color color) => color.data.ToArgb32();
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Rgb24 ToRgb24() => this.data.ToRgb24();
 
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Rgb24"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Rgb24"/>.</returns>
-        public static implicit operator Rgb24(Color color) => color.data.ToRgb24();
-
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Bgr24"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Bgr24"/>.</returns>
-        public static implicit operator Bgr24(Color color) => color.data.ToBgr24();
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Bgr24 ToBgr24() => this.data.ToBgr24();
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index f2f8578d83..e4640ff632 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -5,6 +5,7 @@ using System;
 using System.Buffers.Binary;
 using System.Globalization;
 using System.Numerics;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.PixelFormats;
@@ -24,6 +25,26 @@ namespace SixLabors.ImageSharp
     {
         private readonly Rgba64 data;
 
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private Color(byte r, byte g, byte b, byte a)
+        {
+            this.data = new Rgba64(
+                ImageMaths.UpscaleFrom8BitTo16Bit(r),
+                ImageMaths.UpscaleFrom8BitTo16Bit(g),
+                ImageMaths.UpscaleFrom8BitTo16Bit(b),
+                ImageMaths.UpscaleFrom8BitTo16Bit(a));
+        }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private Color(byte r, byte g, byte b)
+        {
+            this.data = new Rgba64(
+                ImageMaths.UpscaleFrom8BitTo16Bit(r),
+                ImageMaths.UpscaleFrom8BitTo16Bit(g),
+                ImageMaths.UpscaleFrom8BitTo16Bit(b),
+                ushort.MaxValue);
+        }
+
         /// <summary>
         /// Checks whether two <see cref="Color"/> structures are equal.
         /// </summary>
@@ -33,6 +54,7 @@ namespace SixLabors.ImageSharp
         /// True if the <paramref name="left"/> parameter is equal to the <paramref name="right"/> parameter;
         /// otherwise, false.
         /// </returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public static bool operator ==(Color left, Color right)
         {
             return left.Equals(right);
@@ -47,6 +69,7 @@ namespace SixLabors.ImageSharp
         /// True if the <paramref name="left"/> parameter is not equal to the <paramref name="right"/> parameter;
         /// otherwise, false.
         /// </returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public static bool operator !=(Color left, Color right)
         {
             return !left.Equals(right);
@@ -60,7 +83,8 @@ namespace SixLabors.ImageSharp
         /// <param name="b">The blue component (0-255).</param>
         /// <param name="a">The alpha component (0-255).</param>
         /// <returns>The <see cref="Color"/>.</returns>
-        public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(new Rgba32(r, g, b, a));
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static Color FromRgba(byte r, byte g, byte b, byte a) => new Color(r, g, b, a);
 
         /// <summary>
         /// Creates a <see cref="Color"/> from RGB bytes.
@@ -69,7 +93,8 @@ namespace SixLabors.ImageSharp
         /// <param name="g">The green component (0-255).</param>
         /// <param name="b">The blue component (0-255).</param>
         /// <returns>The <see cref="Color"/>.</returns>
-        public static Color FromRgb(byte r, byte g, byte b) => FromRgba(r, g, b, 255);
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static Color FromRgb(byte r, byte g, byte b) => new Color(r, g, b);
 
         /// <summary>
         /// Creates a new <see cref="Color"/> instance from the string representing a color in hexadecimal form.
@@ -98,6 +123,7 @@ namespace SixLabors.ImageSharp
         /// Gets the hexadecimal representation of the color instance in rrggbbaa form.
         /// </summary>
         /// <returns>A hexadecimal string representation of the value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public string ToHex() => this.data.ToRgba32().ToHex();
 
         /// <inheritdoc />
@@ -109,6 +135,7 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <typeparam name="TPixel">The pixel type to convert to.</typeparam>
         /// <returns>The pixel value.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public TPixel ToPixel<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
@@ -118,6 +145,7 @@ namespace SixLabors.ImageSharp
         }
 
         /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
         public bool Equals(Color other)
         {
             return this.data.PackedValue == other.data.PackedValue;
@@ -126,15 +154,11 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc />
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
-            {
-                return false;
-            }
-
             return obj is Color other && this.Equals(other);
         }
 
         /// <inheritdoc />
+        [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
             return this.data.PackedValue.GetHashCode();
@@ -143,6 +167,7 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Bulk convert a span of <see cref="Color"/> to a span of a specified pixel type.
         /// </summary>
+        [MethodImpl(InliningOptions.ShortMethod)]
         internal static void ToPixel<TPixel>(
             Configuration configuration,
             ReadOnlySpan<Color> source,
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
index 075df01cd2..8981c87458 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Argb32.cs
@@ -142,6 +142,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             set => this.Argb = value;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Argb32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Argb32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Argb32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Argb32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Argb32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Argb32(Color color) => color.ToArgb32();
+
         /// <summary>
         /// Compares two <see cref="Argb32"/> objects for equality.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
index 3ba6436a0b..a0b059dfce 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs
@@ -50,6 +50,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.B = b;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Bgr24"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Bgr24"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Bgr24 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Bgr24"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Bgr24"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Bgr24(Color color) => color.ToBgr24();
+
         /// <summary>
         /// Compares two <see cref="Bgr24"/> objects for equality.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
index 758be8043c..ea7a961885 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs
@@ -98,6 +98,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             set => this.Bgra = value;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Bgra32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Bgra32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Bgra32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Bgra32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Bgra32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Bgra32(Color color) => color.ToBgra32();
+
         /// <summary>
         /// Compares two <see cref="Bgra32"/> objects for equality.
         /// </summary>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
index 1255f66d15..469dbbad4a 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs
@@ -53,6 +53,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.B = b;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Rgb24"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgb24"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Rgb24 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgb24"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgb24"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Rgb24(Color color) => color.ToRgb24();
+
         /// <summary>
         /// Allows the implicit conversion of an instance of <see cref="ColorSpaces.Rgb"/> to a
         /// <see cref="Rgb24"/>.
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
index 7367c44634..c58d17ef42 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
@@ -169,6 +169,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             set => this.Rgba = value;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Rgba32"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgba32"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Rgba32 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgba32"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgba32"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Rgba32(Color color) => color.ToRgba32();
+
         /// <summary>
         /// Allows the implicit conversion of an instance of <see cref="ColorSpaces.Rgb"/> to a
         /// <see cref="Rgba32"/>.
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
index cf9d4a5527..978d9b0156 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba64.cs
@@ -46,6 +46,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <param name="g">The green component.</param>
         /// <param name="b">The blue component.</param>
         /// <param name="a">The alpha component.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(ushort r, ushort g, ushort b, ushort a)
         {
             this.R = r;
@@ -58,6 +59,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="source">A structure of 4 bytes in RGBA byte order.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Rgba32 source)
         {
             this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
@@ -70,6 +72,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="source">A structure of 4 bytes in BGRA byte order.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Bgra32 source)
         {
             this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
@@ -82,6 +85,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="source">A structure of 4 bytes in ARGB byte order.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Argb32 source)
         {
             this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
@@ -94,6 +98,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="source">A structure of 3 bytes in RGB byte order.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Rgb24 source)
         {
             this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
@@ -106,6 +111,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="source">A structure of 3 bytes in BGR byte order.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Bgr24 source)
         {
             this.R = ImageMaths.UpscaleFrom8BitTo16Bit(source.R);
@@ -118,6 +124,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// Initializes a new instance of the <see cref="Rgba64"/> struct.
         /// </summary>
         /// <param name="vector">The <see cref="Vector4"/>.</param>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public Rgba64(Vector4 vector)
         {
             vector = Vector4.Clamp(vector, Vector4.Zero, Vector4.One) * Max;
@@ -149,6 +156,22 @@ namespace SixLabors.ImageSharp.PixelFormats
             set => Unsafe.As<Rgba64, ulong>(ref this) = value;
         }
 
+        /// <summary>
+        /// Converts an <see cref="Rgba64"/> to <see cref="Color"/>.
+        /// </summary>
+        /// <param name="source">The <see cref="Rgba64"/>.</param>
+        /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Color(Rgba64 source) => new Color(source);
+
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Rgba64"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Rgba64"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static implicit operator Rgba64(Color color) => color.ToPixel<Rgba64>();
+
         /// <summary>
         /// Compares two <see cref="Rgba64"/> objects for equality.
         /// </summary>
diff --git a/tests/ImageSharp.Tests/Color/ColorTests.cs b/tests/ImageSharp.Tests/Color/ColorTests.cs
index 729ef94e3c..b2559d1d16 100644
--- a/tests/ImageSharp.Tests/Color/ColorTests.cs
+++ b/tests/ImageSharp.Tests/Color/ColorTests.cs
@@ -38,6 +38,8 @@ namespace SixLabors.ImageSharp.Tests
             
             Assert.False(c1 == c2);
             Assert.True(c1 != c2);
+            
+            Assert.False(c1.Equals(null));
         }
         
         [Fact]

From 0cbb800eac54abbed6b40c3bc9c75c21d69f304c Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 13:44:53 +0200
Subject: [PATCH 175/223] fix merge issues

---
 src/ImageSharp/Color/Color.Conversions.cs | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
index 3123d89e96..16d673d85d 100644
--- a/src/ImageSharp/Color/Color.Conversions.cs
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -62,12 +62,19 @@ namespace SixLabors.ImageSharp
         [MethodImpl(InliningOptions.ShortMethod)]
         public Color(Vector4 vector) => this.data = new Rgba64(vector);
 
-        [MethodImpl(InliningOptions.ShortMethod)]
+        /// <summary>
+        /// Converts a <see cref="Color"/> to <see cref="Vector4"/>.
+        /// </summary>
+        /// <param name="color">The <see cref="Color"/>.</param>
+        /// <returns>The <see cref="Vector4"/>.</returns>
+        public static explicit operator Vector4(Color color) => color.data.ToVector4();
+
         /// <summary>
         /// Converts an <see cref="Vector4"/> to <see cref="Color"/>.
         /// </summary>
         /// <param name="source">The <see cref="Vector4"/>.</param>
         /// <returns>The <see cref="Color"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public static explicit operator Color(Vector4 source) => new Color(source);
 
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -84,12 +91,5 @@ namespace SixLabors.ImageSharp
 
         [MethodImpl(InliningOptions.ShortMethod)]
         internal Bgr24 ToBgr24() => this.data.ToBgr24();
-
-        /// <summary>
-        /// Converts a <see cref="Color"/> to <see cref="Vector4"/>.
-        /// </summary>
-        /// <param name="color">The <see cref="Color"/>.</param>
-        /// <returns>The <see cref="Vector4"/>.</returns>
-        public static explicit operator Vector4(Color color) => color.data.ToVector4();
     }
 }
\ No newline at end of file

From 253e8d3a0e77d193a2b543b452579a89571bb7f8 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 14:37:02 +0200
Subject: [PATCH 176/223] DrawImageTests: add tolerance to make all test
 configurations happy

---
 tests/ImageSharp.Tests/Drawing/DrawImageTests.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index f4e9b7b450..70879e6feb 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -91,7 +91,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 }
                 
                 image.DebugSave(provider, testInfo, encoder: encoder);
-                image.CompareToReferenceOutput(provider, testInfo);
+                image.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f),
+                    provider,
+                    testInfo);
             }
         }
         
@@ -146,7 +148,10 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 image.Mutate(x => x.DrawImage(blend, position,  .75F));
                 
                 image.DebugSave(provider, appendSourceFileOrDescription: false, appendPixelTypeToFileName: false);
-                image.CompareToReferenceOutput(provider, appendSourceFileOrDescription: false, appendPixelTypeToFileName: false);
+                image.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.002f),
+                    provider,
+                    appendSourceFileOrDescription: false, 
+                    appendPixelTypeToFileName: false);
             }
         }
 

From 7b81ea5e6bab2084d2f26da86dfa4052b3cab9dd Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sun, 12 May 2019 18:38:22 +0200
Subject: [PATCH 177/223] Review changes

---
 src/ImageSharp/Formats/Bmp/BmpEncoder.cs      |  7 +++
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  | 61 ++++++++++---------
 .../Formats/Bmp/IBmpEncoderOptions.cs         |  9 ++-
 3 files changed, 47 insertions(+), 30 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
index f3eb9282ce..612675c33c 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoder.cs
@@ -4,6 +4,7 @@
 using System.IO;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
 
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
@@ -25,6 +26,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         public bool SupportTransparency { get; set; }
 
+        /// <summary>
+        /// Gets or sets the quantizer for reducing the color count for 8-Bit images.
+        /// Defaults to OctreeQuantizer.
+        /// </summary>
+        public IQuantizer Quantizer { get; set; }
+
         /// <inheritdoc/>
         public void Encode<TPixel>(Image<TPixel> image, Stream stream)
             where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 8d0e8578d1..90ea673d3e 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers;
 using System.IO;
 
 using SixLabors.ImageSharp.Advanced;
@@ -62,6 +63,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private readonly bool writeV4Header;
 
+        /// <summary>
+        /// The quantizer for reducing the color count for 8-Bit images.
+        /// </summary>
+        private readonly IQuantizer quantizer;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="BmpEncoderCore"/> class.
         /// </summary>
@@ -72,6 +78,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.memoryAllocator = memoryAllocator;
             this.bitsPerPixel = options.BitsPerPixel;
             this.writeV4Header = options.SupportTransparency;
+            this.quantizer = options.Quantizer ?? new OctreeQuantizer(dither: true, maxColors: 256);
         }
 
         /// <summary>
@@ -298,39 +305,35 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private void Write8Bit<TPixel>(Stream stream, ImageFrame<TPixel> image)
             where TPixel : struct, IPixel<TPixel>
         {
-#if NETCOREAPP2_1
-            Span<byte> colorPalette = stackalloc byte[ColorPaletteSize8Bit];
-#else
-            byte[] colorPalette = new byte[ColorPaletteSize8Bit];
-#endif
-
-            var quantizer = new OctreeQuantizer(dither: true, maxColors: 256);
-            QuantizedFrame<TPixel> quantized = quantizer.CreateFrameQuantizer<TPixel>(this.configuration).QuantizeFrame(image);
-
-            int idx = 0;
-            var color = default(Rgba32);
-            foreach (TPixel quantizedColor in quantized.Palette)
+            using (IMemoryOwner<byte> colorPaletteBuffer = this.memoryAllocator.AllocateManagedByteBuffer(ColorPaletteSize8Bit, AllocationOptions.Clean))
+            using (QuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
             {
-                quantizedColor.ToRgba32(ref color);
-                colorPalette[idx] = color.B;
-                colorPalette[idx + 1] = color.G;
-                colorPalette[idx + 2] = color.R;
-
-                // Padding byte, always 0
-                colorPalette[idx + 3] = 0;
-                idx += 4;
-            }
-
-            stream.Write(colorPalette, 0, ColorPaletteSize8Bit);
+                Span<byte> colorPalette = colorPaletteBuffer.GetSpan();
+                int idx = 0;
+                var color = default(Rgba32);
+                foreach (TPixel quantizedColor in quantized.Palette)
+                {
+                    quantizedColor.ToRgba32(ref color);
+                    colorPalette[idx] = color.B;
+                    colorPalette[idx + 1] = color.G;
+                    colorPalette[idx + 2] = color.R;
+
+                    // Padding byte, always 0
+                    colorPalette[idx + 3] = 0;
+                    idx += 4;
+                }
 
-            for (int y = image.Height - 1; y >= 0; y--)
-            {
-                Span<byte> pixelSpan = quantized.GetRowSpan(y);
-                stream.Write(pixelSpan);
+                stream.Write(colorPalette);
 
-                for (int i = 0; i < this.padding; i++)
+                for (int y = image.Height - 1; y >= 0; y--)
                 {
-                    stream.WriteByte(0);
+                    Span<byte> pixelSpan = quantized.GetRowSpan(y);
+                    stream.Write(pixelSpan);
+
+                    for (int i = 0; i < this.padding; i++)
+                    {
+                        stream.WriteByte(0);
+                    }
                 }
             }
         }
diff --git a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
index 92ff092705..59ad929df7 100644
--- a/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
+++ b/src/ImageSharp/Formats/Bmp/IBmpEncoderOptions.cs
@@ -1,10 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
+
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
-    /// Configuration options for use during bmp encoding
+    /// Configuration options for use during bmp encoding.
     /// </summary>
     internal interface IBmpEncoderOptions
     {
@@ -20,5 +22,10 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// Instead a bitmap version 4 info header will be written with the BITFIELDS compression.
         /// </summary>
         bool SupportTransparency { get; }
+
+        /// <summary>
+        /// Gets the quantizer for reducing the color count for 8-Bit images.
+        /// </summary>
+        IQuantizer Quantizer { get; }
     }
 }
\ No newline at end of file

From 90c0772d96e988114e61a7da06bf93f300b98416 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 20:39:01 +0200
Subject: [PATCH 178/223] started the refactor

---
 .../Processing/DrawingHelpers.cs              | 19 ++++++++++++
 src/ImageSharp.Drawing/Processing/IBrush.cs   |  9 ++++--
 src/ImageSharp.Drawing/Processing/IPen.cs     | 16 +++-------
 .../Processing/PatternBrush{TPixel}.cs        | 30 +++++++++++--------
 .../Processing/SolidBrush{TPixel}.cs          | 18 +++++------
 src/ImageSharp/Color/Color.Conversions.cs     |  3 ++
 6 files changed, 59 insertions(+), 36 deletions(-)
 create mode 100644 src/ImageSharp.Drawing/Processing/DrawingHelpers.cs

diff --git a/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs b/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs
new file mode 100644
index 0000000000..314b65f7e7
--- /dev/null
+++ b/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs
@@ -0,0 +1,19 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+
+namespace SixLabors.ImageSharp.Processing
+{
+    internal static class DrawingHelpers
+    {
+        public static DenseMatrix<TPixel> ToPixelMatrix<TPixel>(this DenseMatrix<Color> colorMatrix, Configuration configuration)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            DenseMatrix<TPixel> result = new DenseMatrix<TPixel>(colorMatrix.Columns, colorMatrix.Rows);
+            Color.ToPixel(configuration, colorMatrix.Span, result.Span);
+            return result;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/IBrush.cs b/src/ImageSharp.Drawing/Processing/IBrush.cs
index a3c94a1b5a..aa8c25b950 100644
--- a/src/ImageSharp.Drawing/Processing/IBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/IBrush.cs
@@ -14,8 +14,7 @@ namespace SixLabors.ImageSharp.Processing
     /// A brush is a simple class that will return an <see cref="BrushApplicator{TPixel}" /> that will perform the
     /// logic for converting a pixel location to a <typeparamref name="TPixel"/>.
     /// </remarks>
-    public interface IBrush<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public interface IBrush
     {
         /// <summary>
         /// Creates the applicator for this brush.
@@ -30,6 +29,10 @@ namespace SixLabors.ImageSharp.Processing
         /// The <paramref name="region" /> when being applied to things like shapes would usually be the
         /// bounding box of the shape not necessarily the bounds of the whole image
         /// </remarks>
-        BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options);
+        BrushApplicator<TPixel> CreateApplicator<TPixel>(
+            ImageFrame<TPixel> source,
+            RectangleF region,
+            GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel>;
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/IPen.cs b/src/ImageSharp.Drawing/Processing/IPen.cs
index 6f63dcfd0f..b9e359d601 100644
--- a/src/ImageSharp.Drawing/Processing/IPen.cs
+++ b/src/ImageSharp.Drawing/Processing/IPen.cs
@@ -7,23 +7,15 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.Processing
 {
     /// <summary>
-    /// Interface representing a Pen
+    /// Interface representing the pattern and size of the stroke to apply with a Pen.
     /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
-    public interface IPen<TPixel> : IPen
-            where TPixel : struct, IPixel<TPixel>
+    public interface IPen
     {
         /// <summary>
         /// Gets the stroke fill.
         /// </summary>
-        IBrush<TPixel> StrokeFill { get; }
-    }
-
-    /// <summary>
-    /// Interface representing the pattern and size of the stroke to apply with a Pen.
-    /// </summary>
-    public interface IPen
-    {
+        IBrush StrokeFill { get; }
+        
         /// <summary>
         /// Gets the width to apply to the stroke
         /// </summary>
diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
index 20161b517d..249383f3b1 100644
--- a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
@@ -35,13 +35,12 @@ namespace SixLabors.ImageSharp.Processing
     /// </para>
     /// </remarks>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class PatternBrush<TPixel> : IBrush<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class PatternBrush : IBrush
     {
         /// <summary>
         /// The pattern.
         /// </summary>
-        private readonly DenseMatrix<TPixel> pattern;
+        private readonly DenseMatrix<Color> pattern;
         private readonly DenseMatrix<Vector4> patternVector;
 
         /// <summary>
@@ -50,7 +49,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="foreColor">Color of the fore.</param>
         /// <param name="backColor">Color of the back.</param>
         /// <param name="pattern">The pattern.</param>
-        public PatternBrush(TPixel foreColor, TPixel backColor, bool[,] pattern)
+        public PatternBrush(Color foreColor, Color backColor, bool[,] pattern)
             : this(foreColor, backColor, new DenseMatrix<bool>(pattern))
         {
         }
@@ -61,11 +60,11 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="foreColor">Color of the fore.</param>
         /// <param name="backColor">Color of the back.</param>
         /// <param name="pattern">The pattern.</param>
-        internal PatternBrush(TPixel foreColor, TPixel backColor, in DenseMatrix<bool> pattern)
+        internal PatternBrush(Color foreColor, Color backColor, in DenseMatrix<bool> pattern)
         {
             var foreColorVector = foreColor.ToVector4();
             var backColorVector = backColor.ToVector4();
-            this.pattern = new DenseMatrix<TPixel>(pattern.Columns, pattern.Rows);
+            this.pattern = new DenseMatrix<Color>(pattern.Columns, pattern.Rows);
             this.patternVector = new DenseMatrix<Vector4>(pattern.Columns, pattern.Rows);
             for (int i = 0; i < pattern.Data.Length; i++)
             {
@@ -86,19 +85,25 @@ namespace SixLabors.ImageSharp.Processing
         /// Initializes a new instance of the <see cref="PatternBrush{TPixel}"/> class.
         /// </summary>
         /// <param name="brush">The brush.</param>
-        internal PatternBrush(PatternBrush<TPixel> brush)
+        internal PatternBrush(PatternBrush<Color> brush)
         {
             this.pattern = brush.pattern;
             this.patternVector = brush.patternVector;
         }
 
         /// <inheritdoc />
-        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options) => new PatternBrushApplicator(source, this.pattern, this.patternVector, options);
+        public BrushApplicator<TPixel> CreateApplicator<TPixel>(
+            ImageFrame<TPixel> source,
+            RectangleF region,
+            GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel> =>
+            new PatternBrushApplicator<TPixel>(source, this.pattern, this.patternVector, options);
 
         /// <summary>
         /// The pattern brush applicator.
         /// </summary>
-        private class PatternBrushApplicator : BrushApplicator<TPixel>
+        private class PatternBrushApplicator<TPixel> : BrushApplicator<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             /// <summary>
             /// The pattern.
@@ -107,16 +112,17 @@ namespace SixLabors.ImageSharp.Processing
             private readonly DenseMatrix<Vector4> patternVector;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="PatternBrushApplicator" /> class.
+            /// Initializes a new instance of the <see cref="PatternBrushApplicator{TPixel}" /> class.
             /// </summary>
             /// <param name="source">The source image.</param>
             /// <param name="pattern">The pattern.</param>
             /// <param name="patternVector">The patternVector.</param>
             /// <param name="options">The options</param>
-            public PatternBrushApplicator(ImageFrame<TPixel> source, in DenseMatrix<TPixel> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
+            public PatternBrushApplicator(ImageFrame<TPixel> source, in DenseMatrix<Color> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
                 : base(source, options)
             {
-                this.pattern = pattern;
+                this.pattern = new DenseMatrix<TPixel>(pattern.Columns, pattern.Rows);
+                Color.ToPixel<TPixel>(source.Configuration, pattern.Data, this.pattern.Data);
                 this.patternVector = patternVector;
             }
 
diff --git a/src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs
index 20a6833c40..75ca5aa7e8 100644
--- a/src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs
@@ -15,20 +15,18 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Provides an implementation of a solid brush for painting solid color areas.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class SolidBrush<TPixel> : IBrush<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class SolidBrush : IBrush
     {
         /// <summary>
         /// The color to paint.
         /// </summary>
-        private readonly TPixel color;
+        private readonly Color color;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="SolidBrush{TPixel}"/> class.
         /// </summary>
         /// <param name="color">The color.</param>
-        public SolidBrush(TPixel color)
+        public SolidBrush(Color color)
         {
             this.color = color;
         }
@@ -39,18 +37,20 @@ namespace SixLabors.ImageSharp.Processing
         /// <value>
         /// The color.
         /// </value>
-        public TPixel Color => this.color;
+        public Color Color => this.color;
 
         /// <inheritdoc />
-        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
+        public BrushApplicator<TPixel> CreateApplicator<TPixel>(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel>
         {
-            return new SolidBrushApplicator(source, this.color, options);
+            return new SolidBrushApplicator<TPixel>(source, this.color.ToPixel<TPixel>(), options);
         }
 
         /// <summary>
         /// The solid brush applicator.
         /// </summary>
-        private class SolidBrushApplicator : BrushApplicator<TPixel>
+        private class SolidBrushApplicator<TPixel> : BrushApplicator<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             /// <summary>
             /// Initializes a new instance of the <see cref="SolidBrushApplicator"/> class.
diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
index 16d673d85d..a6e0717f48 100644
--- a/src/ImageSharp/Color/Color.Conversions.cs
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -91,5 +91,8 @@ namespace SixLabors.ImageSharp
 
         [MethodImpl(InliningOptions.ShortMethod)]
         internal Bgr24 ToBgr24() => this.data.ToBgr24();
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        internal Vector4 ToVector4() => this.data.ToVector4();
     }
 }
\ No newline at end of file

From 0e2c53e5ed2e25b5c2f3513ec45958df2e1620da Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 21:08:19 +0200
Subject: [PATCH 179/223] Pen, Brush & Processors refactored

---
 src/ImageSharp.Drawing/Processing/Brushes.cs  | 120 ++++-----
 .../Processing/DrawBezierExtensions.cs        |  44 ++--
 .../Processing/ImageBrush{TPixel}.cs          |  28 +--
 .../Processing/PatternBrush{TPixel}.cs        |  11 +-
 src/ImageSharp.Drawing/Processing/Pens.cs     |  50 +---
 .../Processing/Pen{TPixel}.cs                 |  18 +-
 .../Processors/Drawing/FillProcessor.cs       |  57 +++--
 .../Processors/Drawing/FillRegionProcessor.cs |  63 +++--
 .../Processors/Text/DrawTextProcessor.cs      |  55 ++++-
 .../Processing/RecolorBrush{TPixel}.cs        |  29 ++-
 src/ImageSharp/GraphicsOptions.cs             | 231 +++++++++---------
 11 files changed, 356 insertions(+), 350 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/Brushes.cs b/src/ImageSharp.Drawing/Processing/Brushes.cs
index c5e7a3e9ff..bd73e1f1b6 100644
--- a/src/ImageSharp.Drawing/Processing/Brushes.cs
+++ b/src/ImageSharp.Drawing/Processing/Brushes.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// A collection of methods for creating generic brushes.
     /// </summary>
-    /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
+    /// <returns>A New <see cref="PatternBrush"/></returns>
     public static class Brushes
     {
         /// <summary>
@@ -94,163 +94,131 @@ namespace SixLabors.ImageSharp.Processing
         /// Create as brush that will paint a solid color
         /// </summary>
         /// <param name="color">The color.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static SolidBrush<TPixel> Solid<TPixel>(TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => new SolidBrush<TPixel>(color);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static SolidBrush Solid(Color color) => new SolidBrush(color);
 
         /// <summary>
         /// Create as brush that will paint a Percent10 Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Percent10<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, Percent10Pattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Percent10(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, Percent10Pattern);
 
         /// <summary>
         /// Create as brush that will paint a Percent10 Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Percent10<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, Percent10Pattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Percent10(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, Percent10Pattern);
 
         /// <summary>
         /// Create as brush that will paint a Percent20 Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Percent20<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, Percent20Pattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Percent20(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, Percent20Pattern);
 
         /// <summary>
         /// Create as brush that will paint a Percent20 Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Percent20<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, Percent20Pattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Percent20(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, Percent20Pattern);
 
         /// <summary>
         /// Create as brush that will paint a Horizontal Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Horizontal<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, HorizontalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Horizontal(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, HorizontalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Horizontal Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Horizontal<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, HorizontalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Horizontal(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, HorizontalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Min Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Min<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, MinPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Min(Color foreColor) => new PatternBrush(foreColor, Color.Transparent, MinPattern);
 
         /// <summary>
         /// Create as brush that will paint a Min Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Min<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, MinPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Min(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, MinPattern);
 
         /// <summary>
         /// Create as brush that will paint a Vertical Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Vertical<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, VerticalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Vertical(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, VerticalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Vertical Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> Vertical<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, VerticalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush Vertical(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, VerticalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Forward Diagonal Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> ForwardDiagonal<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, ForwardDiagonalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush ForwardDiagonal(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, ForwardDiagonalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Forward Diagonal Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> ForwardDiagonal<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, ForwardDiagonalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush ForwardDiagonal(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, ForwardDiagonalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Backward Diagonal Hatch Pattern with the specified foreground color and a
         /// transparent background.
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> BackwardDiagonal<TPixel>(TPixel foreColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, NamedColors<TPixel>.Transparent, BackwardDiagonalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush BackwardDiagonal(Color foreColor) =>
+            new PatternBrush(foreColor, Color.Transparent, BackwardDiagonalPattern);
 
         /// <summary>
         /// Create as brush that will paint a Backward Diagonal Hatch Pattern with the specified colors
         /// </summary>
         /// <param name="foreColor">Color of the foreground.</param>
         /// <param name="backColor">Color of the background.</param>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <returns>A New <see cref="PatternBrush{TPixel}"/></returns>
-        public static PatternBrush<TPixel> BackwardDiagonal<TPixel>(TPixel foreColor, TPixel backColor)
-            where TPixel : struct, IPixel<TPixel>
-            => new PatternBrush<TPixel>(foreColor, backColor, BackwardDiagonalPattern);
+        /// <returns>A New <see cref="PatternBrush"/></returns>
+        public static PatternBrush BackwardDiagonal(Color foreColor, Color backColor) =>
+            new PatternBrush(foreColor, backColor, BackwardDiagonalPattern);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
index 782f5d4d73..991c01293a 100644
--- a/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
@@ -15,80 +15,80 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, float thickness, params PointF[] points)
+            
+            => source.Draw(options, new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, IBrush brush, float thickness, params PointF[] points)
+            
+            => source.Draw(new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawBeziers(new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, TPixel color, float thickness, params PointF[] points)
+            
+            => source.DrawBeziers(new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawBeziers(options, new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, TPixel color, float thickness, params PointF[] points)
+            
+            => source.DrawBeziers(options, new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided points as an open Bezier path with the supplied pen
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, IPen pen, params PointF[] points)
+            
             => source.Draw(options, pen, new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path with the supplied pen
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawBeziers<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, IPen pen, params PointF[] points)
+            
             => source.Draw(pen, new Path(new CubicBezierLineSegment(points)));
     }
 }
diff --git a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
index cfb3b2ea4f..d5ec1123d7 100644
--- a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
@@ -15,40 +15,38 @@ namespace SixLabors.ImageSharp.Processing
     /// Provides an implementation of an image brush for painting images within areas.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class ImageBrush<TPixel> : IBrush<TPixel>
-    where TPixel : struct, IPixel<TPixel>
+    public class ImageBrush<TPixel> : IBrush
     {
         /// <summary>
         /// The image to paint.
         /// </summary>
-        private readonly ImageFrame<TPixel> image;
+        private readonly Image image;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ImageBrush{TPixel}"/> class.
         /// </summary>
         /// <param name="image">The image.</param>
-        public ImageBrush(ImageFrame<TPixel> image)
+        public ImageBrush(Image image)
         {
             this.image = image;
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ImageBrush{TPixel}"/> class.
-        /// </summary>
-        /// <param name="image">The image.</param>
-        public ImageBrush(Image<TPixel> image)
-            : this(image.Frames.RootFrame)
+        /// <inheritdoc />
+        public BrushApplicator<TPixel> CreateApplicator<TPixel>(
+            ImageFrame<TPixel> source,
+            RectangleF region,
+            GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel>
         {
+            Image<TPixel> specificImage = (Image<TPixel>)this.image;
+            return new ImageBrushApplicator<TPixel>(source, specificImage.Frames.RootFrame, region, options);
         }
 
-        /// <inheritdoc />
-        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
-            => new ImageBrushApplicator(source, this.image, region, options);
-
         /// <summary>
         /// The image brush applicator.
         /// </summary>
-        private class ImageBrushApplicator : BrushApplicator<TPixel>
+        private class ImageBrushApplicator<TPixel> : BrushApplicator<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             /// <summary>
             /// The source image.
diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
index 249383f3b1..0e66756721 100644
--- a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
@@ -97,7 +97,11 @@ namespace SixLabors.ImageSharp.Processing
             RectangleF region,
             GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel> =>
-            new PatternBrushApplicator<TPixel>(source, this.pattern, this.patternVector, options);
+            new PatternBrushApplicator<TPixel>(
+                source,
+                this.pattern.ToPixelMatrix<TPixel>(source.Configuration),
+                this.patternVector,
+                options);
 
         /// <summary>
         /// The pattern brush applicator.
@@ -118,11 +122,10 @@ namespace SixLabors.ImageSharp.Processing
             /// <param name="pattern">The pattern.</param>
             /// <param name="patternVector">The patternVector.</param>
             /// <param name="options">The options</param>
-            public PatternBrushApplicator(ImageFrame<TPixel> source, in DenseMatrix<Color> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
+            public PatternBrushApplicator(ImageFrame<TPixel> source, in DenseMatrix<TPixel> pattern, DenseMatrix<Vector4> patternVector, GraphicsOptions options)
                 : base(source, options)
             {
-                this.pattern = new DenseMatrix<TPixel>(pattern.Columns, pattern.Rows);
-                Color.ToPixel<TPixel>(source.Configuration, pattern.Data, this.pattern.Data);
+                this.pattern = pattern;
                 this.patternVector = patternVector;
             }
 
diff --git a/src/ImageSharp.Drawing/Processing/Pens.cs b/src/ImageSharp.Drawing/Processing/Pens.cs
index 90253a3cb8..4b8f478c92 100644
--- a/src/ImageSharp.Drawing/Processing/Pens.cs
+++ b/src/ImageSharp.Drawing/Processing/Pens.cs
@@ -21,109 +21,79 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Solid<TPixel>(TPixel color, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(color, width);
+        public static Pen Solid(Color color, float width) => new Pen(color, width);
 
         /// <summary>
         /// Create a solid pen with out any drawing patterns
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Solid<TPixel>(IBrush<TPixel> brush, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(brush, width);
+        public static Pen Solid(IBrush brush, float width) => new Pen(brush, width);
 
         /// <summary>
         /// Create a pen with a 'Dash' drawing patterns
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Dash<TPixel>(TPixel color, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(color, width, DashedPattern);
+        public static Pen Dash(Color color, float width) => new Pen(color, width, DashedPattern);
 
         /// <summary>
         /// Create a pen with a 'Dash' drawing patterns
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Dash<TPixel>(IBrush<TPixel> brush, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(brush, width, DashedPattern);
+        public static Pen Dash(IBrush brush, float width) => new Pen(brush, width, DashedPattern);
 
         /// <summary>
         /// Create a pen with a 'Dot' drawing patterns
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Dot<TPixel>(TPixel color, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(color, width, DottedPattern);
+        public static Pen Dot(Color color, float width) => new Pen(color, width, DottedPattern);
 
         /// <summary>
         /// Create a pen with a 'Dot' drawing patterns
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> Dot<TPixel>(IBrush<TPixel> brush, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(brush, width, DottedPattern);
+        public static Pen Dot(IBrush brush, float width) => new Pen(brush, width, DottedPattern);
 
         /// <summary>
         /// Create a pen with a 'Dash Dot' drawing patterns
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> DashDot<TPixel>(TPixel color, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(color, width, DashDotPattern);
+        public static Pen DashDot(Color color, float width) => new Pen(color, width, DashDotPattern);
 
         /// <summary>
         /// Create a pen with a 'Dash Dot' drawing patterns
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> DashDot<TPixel>(IBrush<TPixel> brush, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(brush, width, DashDotPattern);
+        public static Pen DashDot(IBrush brush, float width) => new Pen(brush, width, DashDotPattern);
 
         /// <summary>
         /// Create a pen with a 'Dash Dot Dot' drawing patterns
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> DashDotDot<TPixel>(TPixel color, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(color, width, DashDotDotPattern);
+        public static Pen DashDotDot(Color color, float width) => new Pen(color, width, DashDotDotPattern);
 
         /// <summary>
         /// Create a pen with a 'Dash Dot Dot' drawing patterns
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <returns>The Pen</returns>
-        public static Pen<TPixel> DashDotDot<TPixel>(IBrush<TPixel> brush, float width)
-            where TPixel : struct, IPixel<TPixel>
-            => new Pen<TPixel>(brush, width, DashDotDotPattern);
+        public static Pen DashDotDot(IBrush brush, float width) => new Pen(brush, width, DashDotDotPattern);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs b/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs
index 26c21a0e51..922394946a 100644
--- a/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs
@@ -9,7 +9,6 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Provides a pen that can apply a pattern to a line with a set brush and thickness
     /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
     /// <remarks>
     /// The pattern will be in to the form of new float[]{ 1f, 2f, 0.5f} this will be
     /// converted into a pattern that is 3.5 times longer that the width with 3 sections
@@ -18,8 +17,7 @@ namespace SixLabors.ImageSharp.Processing
     /// section 3 will be width/2 long and will be filled
     /// the the pattern will immediately repeat without gap.
     /// </remarks>
-    public class Pen<TPixel> : IPen<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class Pen : IPen
     {
         private readonly float[] pattern;
 
@@ -29,8 +27,8 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
         /// <param name="pattern">The pattern.</param>
-        public Pen(TPixel color, float width, float[] pattern)
-            : this(new SolidBrush<TPixel>(color), width, pattern)
+        public Pen(Color color, float width, float[] pattern)
+            : this(new SolidBrush(color), width, pattern)
         {
         }
 
@@ -40,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
         /// <param name="pattern">The pattern.</param>
-        public Pen(IBrush<TPixel> brush, float width, float[] pattern)
+        public Pen(IBrush brush, float width, float[] pattern)
         {
             this.StrokeFill = brush;
             this.StrokeWidth = width;
@@ -52,8 +50,8 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
-        public Pen(TPixel color, float width)
-            : this(new SolidBrush<TPixel>(color), width)
+        public Pen(Color color, float width)
+            : this(new SolidBrush(color), width)
         {
         }
 
@@ -62,13 +60,13 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
-        public Pen(IBrush<TPixel> brush, float width)
+        public Pen(IBrush brush, float width)
             : this(brush, width, Pens.EmptyPattern)
         {
         }
 
         /// <inheritdoc/>
-        public IBrush<TPixel> StrokeFill { get; }
+        public IBrush StrokeFill { get; }
 
         /// <inheritdoc/>
         public float StrokeWidth { get; }
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
index ed6c869511..8ea1c48cc2 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
@@ -13,6 +13,26 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
+    public class FillProcessor : IImageProcessor
+    {
+        public FillProcessor(IBrush brush, GraphicsOptions options)
+        {
+            this.Brush = brush;
+            this.Options = options;
+        }
+
+        public IBrush Brush { get; }
+        
+        public GraphicsOptions Options { get; }
+
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            return new FillProcessor<TPixel>(this);
+        }
+    }
+    
     /// <summary>
     /// Using the brush as a source of pixels colors blends the brush color with source.
     /// </summary>
@@ -20,21 +40,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
     internal class FillProcessor<TPixel> : ImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        /// <summary>
-        /// The brush.
-        /// </summary>
-        private readonly IBrush<TPixel> brush;
-        private readonly GraphicsOptions options;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="FillProcessor{TPixel}"/> class.
-        /// </summary>
-        /// <param name="brush">The brush to source pixel colors from.</param>
-        /// <param name="options">The options</param>
-        public FillProcessor(IBrush<TPixel> brush, GraphicsOptions options)
+        private readonly FillProcessor definition;
+
+        public FillProcessor(FillProcessor definition)
         {
-            this.brush = brush;
-            this.options = options;
+            this.definition = definition;
         }
 
         /// <inheritdoc/>
@@ -55,11 +65,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 
             var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
 
+            IBrush brush = this.definition.Brush;
+            GraphicsOptions options = this.definition.Options;
+
             // If there's no reason for blending, then avoid it.
-            if (this.IsSolidBrushWithoutBlending(out SolidBrush<TPixel> solidBrush))
+            if (this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush))
             {
                 ParallelExecutionSettings parallelSettings = configuration.GetParallelSettings().MultiplyMinimumPixelsPerTask(4);
 
+                TPixel colorPixel = solidBrush.Color.ToPixel<TPixel>();
+                
                 ParallelHelper.IterateRows(
                     workingRect,
                     parallelSettings,
@@ -67,7 +82,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                         {
                             for (int y = rows.Min; y < rows.Max; y++)
                             {
-                                source.GetPixelRowSpan(y).Slice(minX, width).Fill(solidBrush.Color);
+                                source.GetPixelRowSpan(y).Slice(minX, width).Fill(colorPixel);
                             }
                         });
             }
@@ -85,10 +100,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                 }
 
                 using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
-                using (BrushApplicator<TPixel> applicator = this.brush.CreateApplicator(
+                using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(
                     source,
                     sourceRectangle,
-                    this.options))
+                    options))
                 {
                     amount.GetSpan().Fill(1f);
 
@@ -109,16 +124,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             }
         }
 
-        private bool IsSolidBrushWithoutBlending(out SolidBrush<TPixel> solidBrush)
+        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
         {
-            solidBrush = this.brush as SolidBrush<TPixel>;
+            solidBrush = this.definition.Brush as SolidBrush;
 
             if (solidBrush == null)
             {
                 return false;
             }
 
-            return this.options.IsOpaqueColorWithoutBlending(solidBrush.Color);
+            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
index 550c021caa..3653102efa 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
@@ -13,24 +13,15 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
-    /// <summary>
-    /// Using a brush and a shape fills shape with contents of brush the
-    /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
-    /// <seealso cref="ImageProcessor{TPixel}" />
-    internal class FillRegionProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class FillRegionProcessor : IImageProcessor
     {
-        private const float AntialiasFactor = 1f;
-        private const int DrawPadding = 1;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="FillRegionProcessor{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="FillRegionProcessor" /> class.
         /// </summary>
         /// <param name="brush">The details how to fill the region of interest.</param>
         /// <param name="region">The region of interest to be filled.</param>
         /// <param name="options">The configuration options.</param>
-        public FillRegionProcessor(IBrush<TPixel> brush, Region region, GraphicsOptions options)
+        public FillRegionProcessor(IBrush brush, Region region, GraphicsOptions options)
         {
             this.Region = region;
             this.Brush = brush;
@@ -40,7 +31,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         /// <summary>
         /// Gets the brush.
         /// </summary>
-        public IBrush<TPixel> Brush { get; }
+        public IBrush Brush { get; }
 
         /// <summary>
         /// Gets the region that this processor applies to.
@@ -55,10 +46,35 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         /// </value>
         public GraphicsOptions Options { get; }
 
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            return new FillRegionProcessor<TPixel>(this);
+        }
+    }
+    
+    /// <summary>
+    /// Using a brush and a shape fills shape with contents of brush the
+    /// </summary>
+    /// <typeparam name="TPixel">The type of the color.</typeparam>
+    /// <seealso cref="ImageProcessor{TPixel}" />
+    internal class FillRegionProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly FillRegionProcessor definition;
+
+        public FillRegionProcessor(FillRegionProcessor definition)
+        {
+            this.definition = definition;
+        }
+
         /// <inheritdoc/>
         protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
         {
-            Region region = this.Region;
+            GraphicsOptions options = this.definition.Options;
+            IBrush brush = this.definition.Brush;
+            Region region = this.definition.Region;
             Rectangle rect = region.Bounds;
 
             // Align start/end positions.
@@ -84,17 +100,17 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             // and this can cause missed fills when not using antialiasing.so we offset the pixel grid by 0.5 in the x & y direction thus causing the#
             // region to align with the pixel grid.
             float offset = 0.5f;
-            if (this.Options.Antialias)
+            if (options.Antialias)
             {
                 offset = 0f; // we are antialiasing skip offsetting as real antialiasing should take care of offset.
-                subpixelCount = this.Options.AntialiasSubpixelDepth;
+                subpixelCount = options.AntialiasSubpixelDepth;
                 if (subpixelCount < 4)
                 {
                     subpixelCount = 4;
                 }
             }
 
-            using (BrushApplicator<TPixel> applicator = this.Brush.CreateApplicator(source, rect, this.Options))
+            using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(source, rect, options))
             {
                 int scanlineWidth = maxX - minX;
                 using (IMemoryOwner<float> bBuffer = source.MemoryAllocator.Allocate<float>(maxIntersections))
@@ -107,7 +123,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                     Span<float> buffer = bBuffer.GetSpan();
                     Span<float> scanline = bScanline.GetSpan();
 
-                    bool isSolidBrushWithoutBlending = this.IsSolidBrushWithoutBlending(out SolidBrush<TPixel> solidBrush);
+                    bool isSolidBrushWithoutBlending = this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush);
+                    TPixel solidBrushColor = isSolidBrushWithoutBlending ? solidBrush.Color.ToPixel<TPixel>() : default;
 
                     for (int y = minY; y < maxY; y++)
                     {
@@ -168,7 +185,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 
                         if (scanlineDirty)
                         {
-                            if (!this.Options.Antialias)
+                            if (!options.Antialias)
                             {
                                 bool hasOnes = false;
                                 bool hasZeros = false;
@@ -190,7 +207,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                                 {
                                     if (hasOnes)
                                     {
-                                        source.GetPixelRowSpan(y).Slice(minX, scanlineWidth).Fill(solidBrush.Color);
+                                        source.GetPixelRowSpan(y).Slice(minX, scanlineWidth).Fill(solidBrushColor);
                                     }
 
                                     continue;
@@ -204,16 +221,16 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             }
         }
 
-        private bool IsSolidBrushWithoutBlending(out SolidBrush<TPixel> solidBrush)
+        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
         {
-            solidBrush = this.Brush as SolidBrush<TPixel>;
+            solidBrush = this.definition.Brush as SolidBrush;
 
             if (solidBrush == null)
             {
                 return false;
             }
 
-            return this.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
+            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
index 266d842bfa..016cf56dea 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
@@ -15,17 +15,10 @@ using SixLabors.Shapes;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Text
 {
-    /// <summary>
-    /// Using the brush as a source of pixels colors blends the brush color with source.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class DrawTextProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class DrawTextProcessor : IImageProcessor
     {
-        private CachingGlyphRenderer textRenderer;
-
         /// <summary>
-        /// Initializes a new instance of the <see cref="DrawTextProcessor{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="DrawTextProcessor"/> class.
         /// </summary>
         /// <param name="options">The options</param>
         /// <param name="text">The text we want to render</param>
@@ -33,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         /// <param name="brush">The brush to source pixel colors from.</param>
         /// <param name="pen">The pen to outline text with.</param>
         /// <param name="location">The location on the image to start drawing the text from.</param>
-        public DrawTextProcessor(TextGraphicsOptions options, string text, Font font, IBrush<TPixel> brush, IPen<TPixel> pen, PointF location)
+        public DrawTextProcessor(TextGraphicsOptions options, string text, Font font, IBrush brush, IPen pen, PointF location)
         {
             Guard.NotNull(text, nameof(text));
             Guard.NotNull(font, nameof(font));
@@ -54,7 +47,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         /// <summary>
         /// Gets the brush.
         /// </summary>
-        public IBrush<TPixel> Brush { get; }
+        public IBrush Brush { get; }
 
         /// <summary>
         /// Gets the options
@@ -69,7 +62,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         /// <summary>
         /// Gets the pen used for outlining the text, if Null then we will not outline
         /// </summary>
-        public IPen<TPixel> Pen { get; }
+        public IPen Pen { get; }
 
         /// <summary>
         /// Gets the font used to render the text.
@@ -81,6 +74,42 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         /// </summary>
         public PointF Location { get; }
 
+        /// <inheritdoc />
+        public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+            where TPixel : struct, IPixel<TPixel>
+        {
+            throw new NotImplementedException();
+        }
+    }
+    
+    /// <summary>
+    /// Using the brush as a source of pixels colors blends the brush color with source.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class DrawTextProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private CachingGlyphRenderer textRenderer;
+
+        private readonly DrawTextProcessor definition;
+
+        public DrawTextProcessor(DrawTextProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        private TextGraphicsOptions Options => this.definition.Options;
+
+        private Font Font => this.definition.Font;
+
+        private PointF Location => this.definition.Location;
+
+        private string Text => this.definition.Text;
+
+        private IPen Pen => this.definition.Pen;
+
+        private IBrush Brush => this.definition.Brush;
+
         protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
         {
             base.BeforeImageApply(source, sourceRectangle);
@@ -115,7 +144,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
             Draw(this.textRenderer.FillOperations, this.Brush);
             Draw(this.textRenderer.OutlineOperations, this.Pen?.StrokeFill);
 
-            void Draw(List<DrawingOperation> operations, IBrush<TPixel> brush)
+            void Draw(List<DrawingOperation> operations, IBrush brush)
             {
                 if (operations?.Count > 0)
                 {
diff --git a/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs
index 09a1ff71fb..ff098dce7c 100644
--- a/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs
@@ -16,16 +16,15 @@ namespace SixLabors.ImageSharp.Processing
     /// Provides an implementation of a brush that can recolor an image
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class RecolorBrush<TPixel> : IBrush<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public class RecolorBrush : IBrush
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="RecolorBrush{TPixel}" /> class.
+        /// Initializes a new instance of the <see cref="RecolorBrush" /> class.
         /// </summary>
         /// <param name="sourceColor">Color of the source.</param>
         /// <param name="targetColor">Color of the target.</param>
         /// <param name="threshold">The threshold as a value between 0 and 1.</param>
-        public RecolorBrush(TPixel sourceColor, TPixel targetColor, float threshold)
+        public RecolorBrush(Color sourceColor, Color targetColor, float threshold)
         {
             this.SourceColor = sourceColor;
             this.Threshold = threshold;
@@ -43,23 +42,33 @@ namespace SixLabors.ImageSharp.Processing
         /// <value>
         /// The color of the source.
         /// </value>
-        public TPixel SourceColor { get; }
+        public Color SourceColor { get; }
 
         /// <summary>
         /// Gets the target color.
         /// </summary>
-        public TPixel TargetColor { get; }
+        public Color TargetColor { get; }
 
         /// <inheritdoc />
-        public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
+        public BrushApplicator<TPixel> CreateApplicator<TPixel>(
+            ImageFrame<TPixel> source,
+            RectangleF region,
+            GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel>
         {
-            return new RecolorBrushApplicator(source, this.SourceColor, this.TargetColor, this.Threshold, options);
+            return new RecolorBrushApplicator<TPixel>(
+                source,
+                this.SourceColor.ToPixel<TPixel>(),
+                this.TargetColor.ToPixel<TPixel>(),
+                this.Threshold,
+                options);
         }
 
         /// <summary>
         /// The recolor brush applicator.
         /// </summary>
-        private class RecolorBrushApplicator : BrushApplicator<TPixel>
+        private class RecolorBrushApplicator<TPixel> : BrushApplicator<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             /// <summary>
             /// The source color.
@@ -79,7 +88,7 @@ namespace SixLabors.ImageSharp.Processing
             private readonly TPixel targetColorPixel;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="RecolorBrushApplicator" /> class.
+            /// Initializes a new instance of the <see cref="RecolorBrushApplicator{TPixel}" /> class.
             /// </summary>
             /// <param name="source">The source image.</param>
             /// <param name="sourceColor">Color of the source.</param>
diff --git a/src/ImageSharp/GraphicsOptions.cs b/src/ImageSharp/GraphicsOptions.cs
index 2d20c17732..537418de24 100644
--- a/src/ImageSharp/GraphicsOptions.cs
+++ b/src/ImageSharp/GraphicsOptions.cs
@@ -1,141 +1,141 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-
-namespace SixLabors.ImageSharp
-{
-    /// <summary>
-    /// Options for influencing the drawing functions.
-    /// </summary>
-    public struct GraphicsOptions
-    {
-        /// <summary>
-        /// Represents the default <see cref="GraphicsOptions"/>.
-        /// </summary>
-        public static readonly GraphicsOptions Default = new GraphicsOptions(true);
-
-        private float? blendPercentage;
-
-        private int? antialiasSubpixelDepth;
-
-        private bool? antialias;
-
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// Options for influencing the drawing functions.
+    /// </summary>
+    public struct GraphicsOptions
+    {
+        /// <summary>
+        /// Represents the default <see cref="GraphicsOptions"/>.
+        /// </summary>
+        public static readonly GraphicsOptions Default = new GraphicsOptions(true);
+
+        private float? blendPercentage;
+
+        private int? antialiasSubpixelDepth;
+
+        private bool? antialias;
+
         private PixelColorBlendingMode colorBlendingMode;
 
-        private PixelAlphaCompositionMode alphaCompositionMode;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
-        /// </summary>
-        /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
-        public GraphicsOptions(bool enableAntialiasing)
-        {
+        private PixelAlphaCompositionMode alphaCompositionMode;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
+        /// </summary>
+        /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
+        public GraphicsOptions(bool enableAntialiasing)
+        {
             this.colorBlendingMode = PixelColorBlendingMode.Normal;
-            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
-            this.blendPercentage = 1;
-            this.antialiasSubpixelDepth = 16;
-            this.antialias = enableAntialiasing;
+            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
+            this.blendPercentage = 1;
+            this.antialiasSubpixelDepth = 16;
+            this.antialias = enableAntialiasing;
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
-        /// </summary>
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
+        /// </summary>
         /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
-        /// <param name="opacity">blending percentage to apply to the drawing operation</param>
-        public GraphicsOptions(bool enableAntialiasing, float opacity)
+        /// <param name="opacity">blending percentage to apply to the drawing operation</param>
+        public GraphicsOptions(bool enableAntialiasing, float opacity)
         {
             Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
-
+
             this.colorBlendingMode = PixelColorBlendingMode.Normal;
-            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
-            this.blendPercentage = opacity;
-            this.antialiasSubpixelDepth = 16;
-            this.antialias = enableAntialiasing;
+            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
+            this.blendPercentage = opacity;
+            this.antialiasSubpixelDepth = 16;
+            this.antialias = enableAntialiasing;
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
-        /// </summary>
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
+        /// </summary>
         /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
         /// <param name="opacity">blending percentage to apply to the drawing operation</param>
-        /// <param name="blending">color blending mode to apply to the drawing operation</param>
-        public GraphicsOptions(bool enableAntialiasing, PixelColorBlendingMode blending, float opacity)
+        /// <param name="blending">color blending mode to apply to the drawing operation</param>
+        public GraphicsOptions(bool enableAntialiasing, PixelColorBlendingMode blending, float opacity)
         {
             Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
-
+
             this.colorBlendingMode = blending;
-            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
-            this.blendPercentage = opacity;
-            this.antialiasSubpixelDepth = 16;
-            this.antialias = enableAntialiasing;
+            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
+            this.blendPercentage = opacity;
+            this.antialiasSubpixelDepth = 16;
+            this.antialias = enableAntialiasing;
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
-        /// </summary>
+        /// <summary>
+        /// Initializes a new instance of the <see cref="GraphicsOptions"/> struct.
+        /// </summary>
         /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
         /// <param name="opacity">blending percentage to apply to the drawing operation</param>
         /// <param name="blending">color blending mode to apply to the drawing operation</param>
-        /// <param name="composition">alpha composition mode to apply to the drawing operation</param>
-        public GraphicsOptions(bool enableAntialiasing, PixelColorBlendingMode blending, PixelAlphaCompositionMode composition, float opacity)
+        /// <param name="composition">alpha composition mode to apply to the drawing operation</param>
+        public GraphicsOptions(bool enableAntialiasing, PixelColorBlendingMode blending, PixelAlphaCompositionMode composition, float opacity)
         {
             Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
-
+
             this.colorBlendingMode = blending;
-            this.alphaCompositionMode = composition;
-            this.blendPercentage = opacity;
-            this.antialiasSubpixelDepth = 16;
-            this.antialias = enableAntialiasing;
-        }
-
-        /// <summary>
-        /// Gets or sets a value indicating whether antialiasing should be applied.
-        /// </summary>
-        public bool Antialias
-        {
-            get => this.antialias ?? true;
-            set => this.antialias = value;
-        }
-
-        /// <summary>
-        /// Gets or sets a value indicating the number of subpixels to use while rendering with antialiasing enabled.
-        /// </summary>
-        public int AntialiasSubpixelDepth
-        {
-            get => this.antialiasSubpixelDepth ?? 16;
-            set => this.antialiasSubpixelDepth = value;
-        }
-
-        /// <summary>
-        /// Gets or sets a value indicating the blending percentage to apply to the drawing operation
-        /// </summary>
-        public float BlendPercentage
-        {
-            get => (this.blendPercentage ?? 1).Clamp(0, 1);
-            set => this.blendPercentage = value;
-        }
-
-        // In the future we could expose a PixelBlender<TPixel> directly on here
-        // or some forms of PixelBlender factory for each pixel type. Will need
-        // some API thought post V1.
-
-        /// <summary>
-        /// Gets or sets a value indicating the color blending mode to apply to the drawing operation
-        /// </summary>
-        public PixelColorBlendingMode ColorBlendingMode
-        {
-            get => this.colorBlendingMode;
-            set => this.colorBlendingMode = value;
+            this.alphaCompositionMode = composition;
+            this.blendPercentage = opacity;
+            this.antialiasSubpixelDepth = 16;
+            this.antialias = enableAntialiasing;
         }
 
-        /// <summary>
-        /// Gets or sets a value indicating the alpha composition mode to apply to the drawing operation
-        /// </summary>
-        public PixelAlphaCompositionMode AlphaCompositionMode
-        {
-            get => this.alphaCompositionMode;
-            set => this.alphaCompositionMode = value;
+        /// <summary>
+        /// Gets or sets a value indicating whether antialiasing should be applied.
+        /// </summary>
+        public bool Antialias
+        {
+            get => this.antialias ?? true;
+            set => this.antialias = value;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the number of subpixels to use while rendering with antialiasing enabled.
+        /// </summary>
+        public int AntialiasSubpixelDepth
+        {
+            get => this.antialiasSubpixelDepth ?? 16;
+            set => this.antialiasSubpixelDepth = value;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the blending percentage to apply to the drawing operation
+        /// </summary>
+        public float BlendPercentage
+        {
+            get => (this.blendPercentage ?? 1).Clamp(0, 1);
+            set => this.blendPercentage = value;
+        }
+
+        // In the future we could expose a PixelBlender<TPixel> directly on here
+        // or some forms of PixelBlender factory for each pixel type. Will need
+        // some API thought post V1.
+
+        /// <summary>
+        /// Gets or sets a value indicating the color blending mode to apply to the drawing operation
+        /// </summary>
+        public PixelColorBlendingMode ColorBlendingMode
+        {
+            get => this.colorBlendingMode;
+            set => this.colorBlendingMode = value;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the alpha composition mode to apply to the drawing operation
+        /// </summary>
+        public PixelAlphaCompositionMode AlphaCompositionMode
+        {
+            get => this.alphaCompositionMode;
+            set => this.alphaCompositionMode = value;
         }
 
         /// <summary>
@@ -149,8 +149,7 @@ namespace SixLabors.ImageSharp
         /// filling with a solid color, the blending can be avoided by a plain color replacement.
         /// This method can be useful for such processors to select the fast path.
         /// </remarks>
-        internal bool IsOpaqueColorWithoutBlending<TPixel>(TPixel color)
-            where TPixel : struct, IPixel<TPixel>
+        internal bool IsOpaqueColorWithoutBlending(Color color)
         {
             if (this.ColorBlendingMode != PixelColorBlendingMode.Normal)
             {
@@ -174,6 +173,6 @@ namespace SixLabors.ImageSharp
             }
 
             return true;
-        }
-    }
+        }
+    }
 }
\ No newline at end of file

From 6672741c456428e350b3b908777c26f85df6ebba Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 21:27:04 +0200
Subject: [PATCH 180/223] ImageSharp.Drawing compiles

---
 .../Processing/ColorStop{TPixel}.cs           | 10 +-
 .../Processing/DrawBezierExtensions.cs        | 61 +++++++-----
 .../Processing/DrawLineExtensions.cs          | 61 +++++++-----
 .../DrawPathCollectionExtensions.cs           | 57 ++++++-----
 .../Processing/DrawPathExtensions.cs          | 44 ++++-----
 .../Processing/DrawPolygonExtensions.cs       | 61 +++++++-----
 .../Processing/DrawRectangleExtensions.cs     | 58 +++++++-----
 .../Processing/DrawTextExtensions.cs          | 94 ++++++++++++-------
 .../EllipticGradientBrush{TPixel}.cs          | 21 ++---
 .../Processing/FillPathBuilderExtensions.cs   | 36 ++++---
 .../FillPathCollectionExtensions.cs           | 36 ++++---
 .../Processing/FillPathExtensions.cs          | 28 +++---
 .../Processing/FillPolygonExtensions.cs       | 38 ++++----
 .../Processing/FillRectangleExtensions.cs     | 34 +++----
 .../Processing/FillRegionExtensions.cs        | 52 +++++-----
 .../Processing/GradientBrushBase{TPixel}.cs   | 38 ++++----
 .../Processing/LinearGradientBrush{TPixel}.cs | 19 ++--
 .../Processing/PatternBrush{TPixel}.cs        |  7 +-
 .../Processing/RadialGradientBrush{TPixel}.cs | 22 ++---
 src/ImageSharp/GraphicsOptions.cs             |  1 -
 20 files changed, 442 insertions(+), 336 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs b/src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs
index 7fd0ba7cd3..aee559469f 100644
--- a/src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs
@@ -10,17 +10,15 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// A struct that defines a single color stop.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     [DebuggerDisplay("ColorStop({Ratio} -> {Color}")]
-    public struct ColorStop<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public readonly struct ColorStop
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="ColorStop{TPixel}" /> struct.
+        /// Initializes a new instance of the <see cref="ColorStop" /> struct.
         /// </summary>
         /// <param name="ratio">Where should it be? 0 is at the start, 1 at the end of the Gradient.</param>
         /// <param name="color">What color should be used at that point?</param>
-        public ColorStop(float ratio, TPixel color)
+        public ColorStop(float ratio, in Color color)
         {
             this.Ratio = ratio;
             this.Color = color;
@@ -34,6 +32,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets the color to be used.
         /// </summary>
-        public TPixel Color { get; }
+        public Color Color { get; }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
index 991c01293a..85addd5f2c 100644
--- a/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
@@ -15,80 +15,93 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, float thickness, params PointF[] points)
-            
-            => source.Draw(options, new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(options, new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, IBrush brush, float thickness, params PointF[] points)
-            
-            => source.Draw(new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(new Pen(brush, thickness), new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, TPixel color, float thickness, params PointF[] points)
-            
-            => source.DrawBeziers(new SolidBrush(color), thickness, points);
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawBeziers(new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided points as an open Bezier path at the provided thickness with the supplied brush
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, TPixel color, float thickness, params PointF[] points)
-            
-            => source.DrawBeziers(options, new SolidBrush(color), thickness, points);
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawBeziers(options, new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided points as an open Bezier path with the supplied pen
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, GraphicsOptions options, IPen pen, params PointF[] points)
-            
-            => source.Draw(options, pen, new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(options, pen, new Path(new CubicBezierLineSegment(points)));
 
         /// <summary>
         /// Draws the provided points as an open Bezier path with the supplied pen
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext DrawBeziers(this IImageProcessingContext source, IPen pen, params PointF[] points)
-            
-            => source.Draw(pen, new Path(new CubicBezierLineSegment(points)));
+        public static IImageProcessingContext DrawBeziers(
+            this IImageProcessingContext source,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(pen, new Path(new CubicBezierLineSegment(points)));
     }
 }
diff --git a/src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs
index 9084b30efe..b7b419be61 100644
--- a/src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs
@@ -15,80 +15,93 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the provided Points as an open Linear path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), new Path(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(options, new Pen(brush, thickness), new Path(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as an open Linear path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), new Path(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(new Pen(brush, thickness), new Path(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as an open Linear path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawLines(new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawLines(new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided Points as an open Linear path at the provided thickness with the supplied brush
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawLines(options, new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawLines(options, new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided Points as an open Linear path with the supplied pen
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, pen, new Path(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(options, pen, new Path(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as an open Linear path with the supplied pen
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawLines<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(pen, new Path(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawLines(
+            this IImageProcessingContext source,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(pen, new Path(new LinearLineSegment(points)));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs
index 0d3abf297e..79b4fd0a80 100644
--- a/src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs
@@ -14,14 +14,16 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, IPathCollection paths)
-           where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            IPathCollection paths)
         {
             foreach (IPath path in paths)
             {
@@ -34,67 +36,76 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(GraphicsOptions.Default, pen, paths);
+        public static IImageProcessingContext
+            Draw(this IImageProcessingContext source, IPen pen, IPathCollection paths) =>
+            source.Draw(GraphicsOptions.Default, pen, paths);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="paths">The shapes.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), paths);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            IPathCollection paths) =>
+            source.Draw(options, new Pen(brush, thickness), paths);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), paths);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            IPathCollection paths) =>
+            source.Draw(new Pen(brush, thickness), paths);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new SolidBrush<TPixel>(color), thickness, paths);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            IPathCollection paths) =>
+            source.Draw(options, new SolidBrush(color), thickness, paths);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new SolidBrush<TPixel>(color), thickness, paths);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            IPathCollection paths) =>
+            source.Draw(new SolidBrush(color), thickness, paths);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs
index 4dbe942f2b..f231f1baae 100644
--- a/src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs
@@ -15,80 +15,80 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, IPath path)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, IPen pen, IPath path)
+            
             => source.Fill(options, pen.StrokeFill, new ShapePath(path, pen));
 
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, IPath path)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, IPen pen, IPath path)
+            
             => source.Draw(GraphicsOptions.Default, pen, path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), path);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, float thickness, IPath path)
+            
+            => source.Draw(options, new Pen(brush, thickness), path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), path);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, IBrush brush, float thickness, IPath path)
+            
+            => source.Draw(new Pen(brush, thickness), path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new SolidBrush<TPixel>(color), thickness, path);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, Color color, float thickness, IPath path)
+            
+            => source.Draw(options, new SolidBrush(color), thickness, path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new SolidBrush<TPixel>(color), thickness, path);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, Color color, float thickness, IPath path)
+            
+            => source.Draw(new SolidBrush(color), thickness, path);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs
index 4dcfe00aa3..324e05e87b 100644
--- a/src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs
@@ -15,80 +15,93 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(options, new Pen(brush, thickness), new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            params PointF[] points) =>
+            source.Draw(new Pen(brush, thickness), new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawPolygon(new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawPolygon(new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawPolygon(options, new SolidBrush<TPixel>(color), thickness, points);
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            params PointF[] points) =>
+            source.DrawPolygon(options, new SolidBrush(color), thickness, points);
 
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided Pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(GraphicsOptions.Default, pen, new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(GraphicsOptions.Default, pen, new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided Pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> DrawPolygon<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, pen, new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext DrawPolygon(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            params PointF[] points) =>
+            source.Draw(options, pen, new Polygon(new LinearLineSegment(points)));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs
index 918fb1e738..d0a6c8ccd2 100644
--- a/src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs
@@ -15,80 +15,90 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the outline of the rectangle with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IPen<TPixel> pen, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, pen, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            RectangleF shape) =>
+            source.Draw(options, pen, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
 
         /// <summary>
         /// Draws the outline of the rectangle with the provided pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IPen<TPixel> pen, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(GraphicsOptions.Default, pen, shape);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, IPen pen, RectangleF shape) =>
+            source.Draw(GraphicsOptions.Default, pen, shape);
 
         /// <summary>
         /// Draws the outline of the rectangle with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, float thickness, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new Pen<TPixel>(brush, thickness), shape);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            RectangleF shape) =>
+            source.Draw(options, new Pen(brush, thickness), shape);
 
         /// <summary>
         /// Draws the outline of the rectangle with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, float thickness, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new Pen<TPixel>(brush, thickness), shape);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            RectangleF shape) =>
+            source.Draw(new Pen(brush, thickness), shape);
 
         /// <summary>
         /// Draws the outline of the rectangle with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, float thickness, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(options, new SolidBrush<TPixel>(color), thickness, shape);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            RectangleF shape) =>
+            source.Draw(options, new SolidBrush(color), thickness, shape);
 
         /// <summary>
         /// Draws the outline of the rectangle with the provided brush at the provided thickness.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Draw<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, float thickness, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Draw(new SolidBrush<TPixel>(color), thickness, shape);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            RectangleF shape) =>
+            source.Draw(new SolidBrush(color), thickness, shape);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs b/src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs
index 46061ce9bc..163a676bbe 100644
--- a/src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs
@@ -16,7 +16,6 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the text onto the the image filled via the brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="text">The text.</param>
         /// <param name="font">The font.</param>
@@ -25,14 +24,17 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, string text, Font font, TPixel color, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(TextGraphicsOptions.Default, text, font, color, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            string text,
+            Font font,
+            Color color,
+            PointF location) =>
+            source.DrawText(TextGraphicsOptions.Default, text, font, color, location);
 
         /// <summary>
         /// Draws the text onto the the image filled via the brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="text">The text.</param>
@@ -42,14 +44,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, Font font, TPixel color, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(options, text, font, Brushes.Solid(color), null, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            TextGraphicsOptions options,
+            string text,
+            Font font,
+            Color color,
+            PointF location) =>
+            source.DrawText(options, text, font, Brushes.Solid(color), null, location);
 
         /// <summary>
         /// Draws the text onto the the image filled via the brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="text">The text.</param>
         /// <param name="font">The font.</param>
@@ -58,14 +64,17 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, string text, Font font, IBrush<TPixel> brush, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(TextGraphicsOptions.Default, text, font, brush, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            string text,
+            Font font,
+            IBrush brush,
+            PointF location) =>
+            source.DrawText(TextGraphicsOptions.Default, text, font, brush, location);
 
         /// <summary>
         /// Draws the text onto the the image filled via the brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="text">The text.</param>
@@ -75,14 +84,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, Font font, IBrush<TPixel> brush, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(options, text, font, brush, null, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            TextGraphicsOptions options,
+            string text,
+            Font font,
+            IBrush brush,
+            PointF location) =>
+            source.DrawText(options, text, font, brush, null, location);
 
         /// <summary>
         /// Draws the text onto the the image outlined via the pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="text">The text.</param>
         /// <param name="font">The font.</param>
@@ -91,14 +104,17 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, string text, Font font, IPen<TPixel> pen, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(TextGraphicsOptions.Default, text, font, pen, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            string text,
+            Font font,
+            IPen pen,
+            PointF location) =>
+            source.DrawText(TextGraphicsOptions.Default, text, font, pen, location);
 
         /// <summary>
         /// Draws the text onto the the image outlined via the pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="text">The text.</param>
@@ -108,14 +124,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, Font font, IPen<TPixel> pen, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(options, text, font, null, pen, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            TextGraphicsOptions options,
+            string text,
+            Font font,
+            IPen pen,
+            PointF location) =>
+            source.DrawText(options, text, font, null, pen, location);
 
         /// <summary>
         /// Draws the text onto the the image filled via the brush then outlined via the pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="text">The text.</param>
         /// <param name="font">The font.</param>
@@ -125,14 +145,18 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, string text, Font font, IBrush<TPixel> brush, IPen<TPixel> pen, PointF location)
-            where TPixel : struct, IPixel<TPixel>
-            => source.DrawText(TextGraphicsOptions.Default, text, font, brush, pen, location);
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            string text,
+            Font font,
+            IBrush brush,
+            IPen pen,
+            PointF location) =>
+            source.DrawText(TextGraphicsOptions.Default, text, font, brush, pen, location);
 
         /// <summary>
         /// Draws the text using the default resolution of <value>72dpi</value> onto the the image filled via the brush then outlined via the pen.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="text">The text.</param>
@@ -143,8 +167,14 @@ namespace SixLabors.ImageSharp.Processing
         /// <returns>
         /// The <see cref="Image{TPixel}" />.
         /// </returns>
-        public static IImageProcessingContext<TPixel> DrawText<TPixel>(this IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, Font font, IBrush<TPixel> brush, IPen<TPixel> pen, PointF location)
-           where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new DrawTextProcessor<TPixel>(options, text, font, brush, pen, location));
+        public static IImageProcessingContext DrawText(
+            this IImageProcessingContext source,
+            TextGraphicsOptions options,
+            string text,
+            Font font,
+            IBrush brush,
+            IPen pen,
+            PointF location) =>
+            source.ApplyProcessor(new DrawTextProcessor(options, text, font, brush, pen, location));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
index 64901c8e80..4a8ce44dbb 100644
--- a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
@@ -14,9 +14,7 @@ namespace SixLabors.ImageSharp.Processing
     /// a point on the longest extension of the ellipse and
     /// the ratio between longest and shortest extension.
     /// </summary>
-    /// <typeparam name="TPixel">The Pixel format that is used.</typeparam>
-    public sealed class EllipticGradientBrush<TPixel> : GradientBrushBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class EllipticGradientBrush : GradientBrushBase
     {
         private readonly PointF center;
 
@@ -24,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
 
         private readonly float axisRatio;
 
-        /// <inheritdoc cref="GradientBrushBase{TPixel}" />
+        /// <inheritdoc cref="GradientBrushBase" />
         /// <param name="center">The center of the elliptical gradient and 0 for the color stops.</param>
         /// <param name="referenceAxisEnd">The end point of the reference axis of the ellipse.</param>
         /// <param name="axisRatio">
@@ -39,7 +37,7 @@ namespace SixLabors.ImageSharp.Processing
             PointF referenceAxisEnd,
             float axisRatio,
             GradientRepetitionMode repetitionMode,
-            params ColorStop<TPixel>[] colorStops)
+            params ColorStop[] colorStops)
             : base(repetitionMode, colorStops)
         {
             this.center = center;
@@ -47,12 +45,12 @@ namespace SixLabors.ImageSharp.Processing
             this.axisRatio = axisRatio;
         }
 
-        /// <inheritdoc cref="CreateApplicator" />
-        public override BrushApplicator<TPixel> CreateApplicator(
+        /// <inheritdoc />
+        public override BrushApplicator<TPixel> CreateApplicator<TPixel>(
             ImageFrame<TPixel> source,
             RectangleF region,
             GraphicsOptions options) =>
-            new RadialGradientBrushApplicator(
+            new RadialGradientBrushApplicator<TPixel>(
                 source,
                 options,
                 this.center,
@@ -62,7 +60,8 @@ namespace SixLabors.ImageSharp.Processing
                 this.RepetitionMode);
 
         /// <inheritdoc />
-        private sealed class RadialGradientBrushApplicator : GradientBrushApplicatorBase
+        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF center;
 
@@ -85,7 +84,7 @@ namespace SixLabors.ImageSharp.Processing
             private readonly float referenceRadiusSquared;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="RadialGradientBrushApplicator" /> class.
+            /// Initializes a new instance of the <see cref="RadialGradientBrushApplicator{TPixel}" /> class.
             /// </summary>
             /// <param name="target">The target image</param>
             /// <param name="options">The options</param>
@@ -102,7 +101,7 @@ namespace SixLabors.ImageSharp.Processing
                 PointF center,
                 PointF referenceAxisEnd,
                 float axisRatio,
-                ColorStop<TPixel>[] colorStops,
+                ColorStop[] colorStops,
                 GradientRepetitionMode repetitionMode)
                 : base(target, options, colorStops, repetitionMode)
             {
diff --git a/src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs b/src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs
index ff4de3ff8f..ca7eab93f9 100644
--- a/src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs
@@ -15,14 +15,16 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, Action<PathBuilder> path)
-          where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            Action<PathBuilder> path)
         {
             var pb = new PathBuilder();
             path(pb);
@@ -33,38 +35,42 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, Action<PathBuilder> path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(GraphicsOptions.Default, brush, path);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            IBrush brush,
+            Action<PathBuilder> path) =>
+            source.Fill(GraphicsOptions.Default, brush, path);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, Action<PathBuilder> path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), path);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            Action<PathBuilder> path) =>
+            source.Fill(options, new SolidBrush(color), path);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, Action<PathBuilder> path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), path);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            Color color,
+            Action<PathBuilder> path) =>
+            source.Fill(new SolidBrush(color), path);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs b/src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs
index da2dd35b6a..d750ff455b 100644
--- a/src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs
@@ -14,14 +14,16 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="paths">The shapes.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, IPathCollection paths)
-          where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            IPathCollection paths)
         {
             foreach (IPath s in paths)
             {
@@ -34,38 +36,42 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(GraphicsOptions.Default, brush, paths);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            IBrush brush,
+            IPathCollection paths) =>
+            source.Fill(GraphicsOptions.Default, brush, paths);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), paths);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            IPathCollection paths) =>
+            source.Fill(options, new SolidBrush(color), paths);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="paths">The paths.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, IPathCollection paths)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), paths);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            Color color,
+            IPathCollection paths) =>
+            source.Fill(new SolidBrush(color), paths);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/FillPathExtensions.cs b/src/ImageSharp.Drawing/Processing/FillPathExtensions.cs
index da10621113..7cf67612a2 100644
--- a/src/ImageSharp.Drawing/Processing/FillPathExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillPathExtensions.cs
@@ -15,51 +15,51 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, IPath path)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, IPath path)
+            
             => source.Fill(options, brush, new ShapeRegion(path));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, IPath path)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, IPath path)
+            
             => source.Fill(GraphicsOptions.Default, brush, new ShapeRegion(path));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush..
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), path);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, Color color, IPath path)
+            
+            => source.Fill(options, new SolidBrush(color), path);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush..
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, IPath path)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), path);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, IPath path)
+            
+            => source.Fill(new SolidBrush(color), path);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs b/src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs
index 970ca22644..8150c7381e 100644
--- a/src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs
@@ -15,51 +15,57 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of a Linear polygon described by the points
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> FillPolygon<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, brush, new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext FillPolygon(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            params PointF[] points) =>
+            source.Fill(options, brush, new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Flood fills the image in the shape of a Linear polygon described by the points
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> FillPolygon<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(brush, new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext FillPolygon(
+            this IImageProcessingContext source,
+            IBrush brush,
+            params PointF[] points) =>
+            source.Fill(brush, new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Flood fills the image in the shape of a Linear polygon described by the points
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> FillPolygon<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext FillPolygon(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            params PointF[] points) =>
+            source.Fill(options, new SolidBrush(color), new Polygon(new LinearLineSegment(points)));
 
         /// <summary>
         /// Flood fills the image in the shape of a Linear polygon described by the points
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="points">The points.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> FillPolygon<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, params PointF[] points)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), new Polygon(new LinearLineSegment(points)));
+        public static IImageProcessingContext FillPolygon(
+            this IImageProcessingContext source,
+            Color color,
+            params PointF[] points) =>
+            source.Fill(new SolidBrush(color), new Polygon(new LinearLineSegment(points)));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs b/src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs
index 26bf214f71..ad512015e2 100644
--- a/src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs
@@ -15,51 +15,53 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided rectangle with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, brush, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            RectangleF shape) =>
+            source.Fill(options, brush, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided rectangle with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(brush, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
+        public static IImageProcessingContext
+            Fill(this IImageProcessingContext source, IBrush brush, RectangleF shape) =>
+            source.Fill(brush, new RectangularPolygon(shape.X, shape.Y, shape.Width, shape.Height));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided rectangle with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), shape);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            RectangleF shape) =>
+            source.Fill(options, new SolidBrush(color), shape);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided rectangle with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="shape">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, RectangleF shape)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), shape);
+        public static IImageProcessingContext
+            Fill(this IImageProcessingContext source, Color color, RectangleF shape) =>
+            source.Fill(new SolidBrush(color), shape);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs b/src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs
index e566d03231..457ad98b0c 100644
--- a/src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs
@@ -15,85 +15,85 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The details how to fill the region of interest.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush)
+            
             => source.Fill(GraphicsOptions.Default, brush);
 
         /// <summary>
         /// Flood fills the image with the specified color.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color));
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color)
+            
+            => source.Fill(new SolidBrush(color));
 
         /// <summary>
         /// Flood fills the image with in the region with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, IBrush<TPixel> brush, Region region)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, Region region)
+            
             => source.Fill(GraphicsOptions.Default, brush, region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified color.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, TPixel color, Region region)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(options, new SolidBrush<TPixel>(color), region);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, Color color, Region region)
+            
+            => source.Fill(options, new SolidBrush(color), region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified color.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, TPixel color, Region region)
-            where TPixel : struct, IPixel<TPixel>
-            => source.Fill(new SolidBrush<TPixel>(color), region);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, Region region)
+            
+            => source.Fill(new SolidBrush(color), region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush, Region region)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new FillRegionProcessor<TPixel>(brush, region, options));
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, Region region)
+            
+            => source.ApplyProcessor(new FillRegionProcessor(brush, region, options));
 
         /// <summary>
         /// Flood fills the image with the specified brush.
         /// </summary>
-        /// <typeparam name="TPixel">The type of the color.</typeparam>
+        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The details how to fill the region of interest.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext<TPixel> Fill<TPixel>(this IImageProcessingContext<TPixel> source, GraphicsOptions options, IBrush<TPixel> brush)
-            where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new FillProcessor<TPixel>(brush, options));
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush)
+            
+            => source.ApplyProcessor(new FillProcessor(brush, options));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
index 2dfae9e8f1..a877ea96cd 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
@@ -13,16 +13,14 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Base class for Gradient brushes
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format</typeparam>
-    public abstract class GradientBrushBase<TPixel> : IBrush<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public abstract class GradientBrushBase : IBrush
     {
-        /// <inheritdoc cref="IBrush{TPixel}"/>
+        /// <inheritdoc cref="IBrush"/>
         /// <param name="repetitionMode">Defines how the colors are repeated beyond the interval [0..1]</param>
         /// <param name="colorStops">The gradient colors.</param>
         protected GradientBrushBase(
             GradientRepetitionMode repetitionMode,
-            params ColorStop<TPixel>[] colorStops)
+            params ColorStop[] colorStops)
         {
             this.RepetitionMode = repetitionMode;
             this.ColorStops = colorStops;
@@ -36,25 +34,27 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets the list of color stops for this gradient.
         /// </summary>
-        protected ColorStop<TPixel>[] ColorStops { get; }
+        protected ColorStop[] ColorStops { get; }
 
-        /// <inheritdoc cref="IBrush{TPixel}" />
-        public abstract BrushApplicator<TPixel> CreateApplicator(
+        /// <inheritdoc />
+        public abstract BrushApplicator<TPixel> CreateApplicator<TPixel>(
             ImageFrame<TPixel> source,
             RectangleF region,
-            GraphicsOptions options);
+            GraphicsOptions options)
+            where TPixel : struct, IPixel<TPixel>;
 
         /// <summary>
         /// Base class for gradient brush applicators
         /// </summary>
-        protected abstract class GradientBrushApplicatorBase : BrushApplicator<TPixel>
+        protected abstract class GradientBrushApplicatorBase<TPixel> : BrushApplicator<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
-            private readonly ColorStop<TPixel>[] colorStops;
+            private readonly ColorStop[] colorStops;
 
             private readonly GradientRepetitionMode repetitionMode;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="GradientBrushApplicatorBase"/> class.
+            /// Initializes a new instance of the <see cref="GradientBrushApplicatorBase{TPixel}"/> class.
             /// </summary>
             /// <param name="target">The target.</param>
             /// <param name="options">The options.</param>
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Processing
             protected GradientBrushApplicatorBase(
                 ImageFrame<TPixel> target,
                 GraphicsOptions options,
-                ColorStop<TPixel>[] colorStops,
+                ColorStop[] colorStops,
                 GradientRepetitionMode repetitionMode)
                 : base(target, options)
             {
@@ -111,11 +111,11 @@ namespace SixLabors.ImageSharp.Processing
                             throw new ArgumentOutOfRangeException();
                     }
 
-                    (ColorStop<TPixel> from, ColorStop<TPixel> to) = this.GetGradientSegment(positionOnCompleteGradient);
+                    (ColorStop from, ColorStop to) = this.GetGradientSegment(positionOnCompleteGradient);
 
                     if (from.Color.Equals(to.Color))
                     {
-                        return from.Color;
+                        return from.Color.ToPixel<TPixel>();
                     }
                     else
                     {
@@ -150,14 +150,14 @@ namespace SixLabors.ImageSharp.Processing
             /// </returns>
             protected abstract float PositionOnGradient(float x, float y);
 
-            private (ColorStop<TPixel> from, ColorStop<TPixel> to) GetGradientSegment(
+            private (ColorStop from, ColorStop to) GetGradientSegment(
                 float positionOnCompleteGradient)
             {
-                ColorStop<TPixel> localGradientFrom = this.colorStops[0];
-                ColorStop<TPixel> localGradientTo = default;
+                ColorStop localGradientFrom = this.colorStops[0];
+                ColorStop localGradientTo = default;
 
                 // TODO: ensure colorStops has at least 2 items (technically 1 would be okay, but that's no gradient)
-                foreach (ColorStop<TPixel> colorStop in this.colorStops)
+                foreach (ColorStop colorStop in this.colorStops)
                 {
                     localGradientTo = colorStop;
 
diff --git a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
index efdc852f28..1a6f8d79ab 100644
--- a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
@@ -14,15 +14,15 @@ namespace SixLabors.ImageSharp.Processing
     /// - a set of colors in relative distances to each other.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format</typeparam>
-    public sealed class LinearGradientBrush<TPixel> : GradientBrushBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class LinearGradientBrush : GradientBrushBase
+        
     {
         private readonly PointF p1;
 
         private readonly PointF p2;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="LinearGradientBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="LinearGradientBrush"/> class.
         /// </summary>
         /// <param name="p1">Start point</param>
         /// <param name="p2">End point</param>
@@ -32,7 +32,7 @@ namespace SixLabors.ImageSharp.Processing
             PointF p1,
             PointF p2,
             GradientRepetitionMode repetitionMode,
-            params ColorStop<TPixel>[] colorStops)
+            params ColorStop[] colorStops)
             : base(repetitionMode, colorStops)
         {
             this.p1 = p1;
@@ -40,13 +40,14 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <inheritdoc />
-        public override BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
-            => new LinearGradientBrushApplicator(source, this.p1, this.p2, this.ColorStops, this.RepetitionMode, options);
+        public override BrushApplicator<TPixel> CreateApplicator<TPixel>(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
+            => new LinearGradientBrushApplicator<TPixel>(source, this.p1, this.p2, this.ColorStops, this.RepetitionMode, options);
 
         /// <summary>
         /// The linear gradient brush applicator.
         /// </summary>
-        private sealed class LinearGradientBrushApplicator : GradientBrushApplicatorBase
+        private sealed class LinearGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF start;
 
@@ -83,7 +84,7 @@ namespace SixLabors.ImageSharp.Processing
             private readonly float length;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="LinearGradientBrushApplicator" /> class.
+            /// Initializes a new instance of the <see cref="LinearGradientBrushApplicator{TPixel}" /> class.
             /// </summary>
             /// <param name="source">The source</param>
             /// <param name="start">start point of the gradient</param>
@@ -95,7 +96,7 @@ namespace SixLabors.ImageSharp.Processing
                 ImageFrame<TPixel> source,
                 PointF start,
                 PointF end,
-                ColorStop<TPixel>[] colorStops,
+                ColorStop[] colorStops,
                 GradientRepetitionMode repetitionMode,
                 GraphicsOptions options)
                 : base(source, options, colorStops, repetitionMode)
diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
index 0e66756721..21690055e1 100644
--- a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
@@ -34,7 +34,6 @@ namespace SixLabors.ImageSharp.Processing
     ///  0
     /// </para>
     /// </remarks>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     public class PatternBrush : IBrush
     {
         /// <summary>
@@ -44,7 +43,7 @@ namespace SixLabors.ImageSharp.Processing
         private readonly DenseMatrix<Vector4> patternVector;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="PatternBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PatternBrush"/> class.
         /// </summary>
         /// <param name="foreColor">Color of the fore.</param>
         /// <param name="backColor">Color of the back.</param>
@@ -55,7 +54,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="PatternBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PatternBrush"/> class.
         /// </summary>
         /// <param name="foreColor">Color of the fore.</param>
         /// <param name="backColor">Color of the back.</param>
@@ -85,7 +84,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Initializes a new instance of the <see cref="PatternBrush{TPixel}"/> class.
         /// </summary>
         /// <param name="brush">The brush.</param>
-        internal PatternBrush(PatternBrush<Color> brush)
+        internal PatternBrush(PatternBrush brush)
         {
             this.pattern = brush.pattern;
             this.patternVector = brush.patternVector;
diff --git a/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
index d33d099931..84a97e7d1f 100644
--- a/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
@@ -11,15 +11,14 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// A Circular Gradient Brush, defined by center point and radius.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public sealed class RadialGradientBrush<TPixel> : GradientBrushBase<TPixel>
-        where TPixel : struct, IPixel<TPixel>
+    public sealed class RadialGradientBrush : GradientBrushBase
+        
     {
         private readonly PointF center;
 
         private readonly float radius;
 
-        /// <inheritdoc cref="GradientBrushBase{TPixel}" />
+        /// <inheritdoc cref="GradientBrushBase" />
         /// <param name="center">The center of the circular gradient and 0 for the color stops.</param>
         /// <param name="radius">The radius of the circular gradient and 1 for the color stops.</param>
         /// <param name="repetitionMode">Defines how the colors in the gradient are repeated.</param>
@@ -28,19 +27,19 @@ namespace SixLabors.ImageSharp.Processing
             PointF center,
             float radius,
             GradientRepetitionMode repetitionMode,
-            params ColorStop<TPixel>[] colorStops)
+            params ColorStop[] colorStops)
             : base(repetitionMode, colorStops)
         {
             this.center = center;
             this.radius = radius;
         }
 
-        /// <inheritdoc cref="CreateApplicator" />
-        public override BrushApplicator<TPixel> CreateApplicator(
+        /// <inheritdoc />
+        public override BrushApplicator<TPixel> CreateApplicator<TPixel>(
             ImageFrame<TPixel> source,
             RectangleF region,
             GraphicsOptions options) =>
-            new RadialGradientBrushApplicator(
+            new RadialGradientBrushApplicator<TPixel>(
                 source,
                 options,
                 this.center,
@@ -49,14 +48,15 @@ namespace SixLabors.ImageSharp.Processing
                 this.RepetitionMode);
 
         /// <inheritdoc />
-        private sealed class RadialGradientBrushApplicator : GradientBrushApplicatorBase
+        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+            where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF center;
 
             private readonly float radius;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="RadialGradientBrushApplicator" /> class.
+            /// Initializes a new instance of the <see cref="RadialGradientBrushApplicator{TPixel}" /> class.
             /// </summary>
             /// <param name="target">The target image</param>
             /// <param name="options">The options.</param>
@@ -69,7 +69,7 @@ namespace SixLabors.ImageSharp.Processing
                 GraphicsOptions options,
                 PointF center,
                 float radius,
-                ColorStop<TPixel>[] colorStops,
+                ColorStop[] colorStops,
                 GradientRepetitionMode repetitionMode)
                 : base(target, options, colorStops, repetitionMode)
             {
diff --git a/src/ImageSharp/GraphicsOptions.cs b/src/ImageSharp/GraphicsOptions.cs
index 537418de24..4d5bf6d513 100644
--- a/src/ImageSharp/GraphicsOptions.cs
+++ b/src/ImageSharp/GraphicsOptions.cs
@@ -141,7 +141,6 @@ namespace SixLabors.ImageSharp
         /// <summary>
         /// Evaluates if a given SOURCE color can completely replace a BACKDROP color given the current blending and composition settings.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format</typeparam>
         /// <param name="color">the color</param>
         /// <returns>true if the color can be considered opaque</returns>
         /// <remarks>

From d3af717d1971bbb14c71cfdd35920ce340d0eb8c Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 21:52:33 +0200
Subject: [PATCH 181/223] everything builds

---
 .../Drawing/DrawBeziers.cs                    |   2 +-
 .../Drawing/DrawLines.cs                      |   2 +-
 .../Drawing/DrawPolygon.cs                    |   2 +-
 .../ImageSharp.Benchmarks/Drawing/DrawText.cs |   4 +-
 .../Drawing/DrawTextOutline.cs                |  23 +++-
 .../Drawing/DrawBezierTests.cs                |   2 +-
 .../Drawing/DrawComplexPolygonTests.cs        |   2 +-
 .../Drawing/DrawLinesTests.cs                 |  12 +-
 .../ImageSharp.Tests/Drawing/DrawPathTests.cs |   4 +-
 .../Drawing/DrawPolygonTests.cs               |   2 +-
 .../Drawing/FillComplexPolygonTests.cs        |   2 +-
 .../Drawing/FillEllipticGradientBrushTest.cs  |  36 +++---
 .../Drawing/FillLinearGradientBrushTests.cs   | 104 +++++++++---------
 .../Drawing/FillPatternBrushTests.cs          |   2 +-
 .../Drawing/FillPolygonTests.cs               |  12 +-
 .../Drawing/FillRadialGradientBrushTests.cs   |  14 +--
 .../Drawing/FillRegionProcessorTests.cs       |  11 +-
 .../Drawing/FillSolidBrushTests.cs            |  22 ++--
 .../Drawing/Paths/DrawPathCollection.cs       |  16 +--
 .../Drawing/Paths/FillPath.cs                 |  16 +--
 .../Drawing/Paths/FillPathCollection.cs       |  16 +--
 .../Drawing/Paths/FillPolygon.cs              |  16 +--
 .../Drawing/Paths/FillRectangle.cs            |  16 +--
 .../Drawing/RecolorImageTests.cs              |   4 +-
 .../Drawing/SolidBezierTests.cs               |   2 +-
 .../Drawing/SolidFillBlendedShapesTests.cs    |  26 ++---
 .../ImageSharp.Tests/Drawing/Text/DrawText.cs |  70 ++++++------
 .../Drawing/Text/DrawTextOnImageTests.cs      |  12 +-
 tests/ImageSharp.Tests/Issues/Issue412.cs     |   6 +-
 .../ImageProviders/SolidProvider.cs           |   3 +-
 .../TestUtilities/TestImageExtensions.cs      |  14 +++
 31 files changed, 248 insertions(+), 227 deletions(-)

diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
index 0a343864d8..8999afaeda 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawBeziers.cs
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                using (var pen = new System.Drawing.Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawBeziers(pen, new[] {
                         new PointF(10, 500),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
index 00942cc364..408e87f9ee 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawLines.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
 
-                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                using (var pen = new System.Drawing.Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawLines(pen, new[] {
                         new PointF(10, 10),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
index dcaf4bae60..2b4cff8cbe 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawPolygon.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             {
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                using (var pen = new System.Drawing.Pen(System.Drawing.Color.HotPink, 10))
                 {
                     graphics.DrawPolygon(pen, new[] {
                         new PointF(10, 10),
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
index 8c840d8c31..28f410e7d1 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
-                image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor<Rgba32>(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10))));
+                image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10))));
             }
         }
 
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.Benchmarks
                 image.Mutate(x => DrawTextOldVersion(x, new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10)));
             }
 
-            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, SixLabors.Fonts.Font font, IBrush<TPixel> brush, IPen<TPixel> pen, SixLabors.Primitives.PointF location)
+            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, SixLabors.Fonts.Font font, IBrush brush, IPen pen, SixLabors.Primitives.PointF location)
                 where TPixel : struct, IPixel<TPixel>
             {
                 float dpiX = 72;
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
index ee17adbb55..658590e2d4 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             {
                 graphics.InterpolationMode = InterpolationMode.Default;
                 graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                using (var pen = new Pen(System.Drawing.Color.HotPink, 10))
+                using (var pen = new System.Drawing.Pen(System.Drawing.Color.HotPink, 10))
                 using (var font = new Font("Arial", 12, GraphicsUnit.Point))
                 using (var gp = new GraphicsPath())
                 {
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Benchmarks
             using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
-                image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor<Rgba32>(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, null, Processing.Pens.Solid(Rgba32.HotPink, 10), new SixLabors.Primitives.PointF(10, 10))));
+                image.Mutate(x => x.ApplyProcessor(new DrawTextProcessor(new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, null, Processing.Pens.Solid(Rgba32.HotPink, 10), new SixLabors.Primitives.PointF(10, 10))));
             }
         }
 
@@ -53,10 +53,25 @@ namespace SixLabors.ImageSharp.Benchmarks
             using (var image = new Image<Rgba32>(800, 800))
             {
                 var font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12);
-                image.Mutate(x => DrawTextOldVersion(x, new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, null, Processing.Pens.Solid(Rgba32.HotPink, 10), new SixLabors.Primitives.PointF(10, 10)));
+                image.Mutate(
+                    x => DrawTextOldVersion(
+                        x,
+                        new TextGraphicsOptions(true) { WrapTextWidth = 780 },
+                        TextToRender,
+                        font,
+                        null,
+                        Processing.Pens.Solid(Rgba32.HotPink, 10),
+                        new SixLabors.Primitives.PointF(10, 10)));
             }
 
-            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, SixLabors.Fonts.Font font, IBrush<TPixel> brush, IPen<TPixel> pen, SixLabors.Primitives.PointF location)
+            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(
+                IImageProcessingContext<TPixel> source,
+                TextGraphicsOptions options,
+                string text,
+                SixLabors.Fonts.Font font,
+                IBrush brush,
+                IPen pen,
+                SixLabors.Primitives.PointF location)
                 where TPixel : struct, IPixel<TPixel>
             {
                 var style = new SixLabors.Fonts.RendererOptions(font, options.DpiX, options.DpiY, location)
diff --git a/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
index 0f29728c9f..4ccc7fd355 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawBezierTests.cs
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             FormattableString testDetails = $"{colorName}_A{alpha}_T{thickness}";
             
-            provider.RunValidatingProcessorTest( x => x.DrawBeziers(color.ToPixel<TPixel>(), 5f, points), 
+            provider.RunValidatingProcessorTest( x => x.DrawBeziers(color, 5f, points), 
                 testDetails,
                 appendSourceFileOrDescription: false,
                 appendPixelTypeToFileName: false);
diff --git a/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
index b6e105a199..f28f3345fc 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawComplexPolygonTests.cs
@@ -58,7 +58,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 testDetails += "_Dashed";
             }
 
-            Pen<TPixel> pen = dashed ? Pens.Dash(color.ToPixel<TPixel>(), 5f) : Pens.Solid(color.ToPixel<TPixel>(), 5f);
+            Pen pen = dashed ? Pens.Dash(color, 5f) : Pens.Solid(color, 5f);
 
             provider.RunValidatingProcessorTest(
                 x => x.Draw(pen, clipped),
diff --git a/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs b/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
index c225b921e6..12eb150b1b 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawLinesTests.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
-            Pen<TPixel> pen = new Pen<TPixel>(color.ToPixel<TPixel>(), thickness);
+            Pen pen = new Pen(color, thickness);
             
             DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
         }
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
-            Pen<TPixel> pen = Pens.Dash(color.ToPixel<TPixel>(), thickness);
+            Pen pen = Pens.Dash(color, thickness);
             
             DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
         }
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
-            Pen<TPixel> pen = Pens.Dot(color.ToPixel<TPixel>(), thickness);
+            Pen pen = Pens.Dot(color, thickness);
             
             DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
         }
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
-            Pen<TPixel> pen = Pens.DashDot(color.ToPixel<TPixel>(), thickness);
+            Pen pen = Pens.DashDot(color, thickness);
             
             DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
         }
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = TestUtils.GetColorByName(colorName).WithAlpha(alpha);
-            Pen<TPixel> pen = Pens.DashDotDot(color.ToPixel<TPixel>(), thickness);
+            Pen pen = Pens.DashDotDot(color, thickness);
             
             DrawLinesImpl(provider, colorName, alpha, thickness, antialias, pen);
         }
@@ -80,7 +80,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             float alpha,
             float thickness,
             bool antialias,
-            Pen<TPixel> pen)
+            Pen pen)
             where TPixel : struct, IPixel<TPixel>
         {
             SixLabors.Primitives.PointF[] simplePath = { new Vector2(10, 10), new Vector2(200, 150), new Vector2(50, 300) };
diff --git a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
index c638107b81..5e9743c31a 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawPathTests.cs
@@ -49,7 +49,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             FormattableString testDetails = $"{colorName}_A{alpha}_T{thickness}";
 
             provider.RunValidatingProcessorTest(
-                x => x.Draw(color.ToPixel<TPixel>(), thickness, path),
+                x => x.Draw(color, thickness, path),
                 testDetails,
                 appendPixelTypeToFileName: false,
                 appendSourceFileOrDescription: false);
@@ -61,7 +61,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             where TPixel : struct, IPixel<TPixel>
         {
             Color color = Color.White;
-            Pen<TPixel> pen = Pens.Solid(color.ToPixel<TPixel>(), 5f);
+            Pen pen = Pens.Solid(color, 5f);
 
             provider.RunValidatingProcessorTest(
                 x =>
diff --git a/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
index 8a0f256670..b7c54fdbd1 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawPolygonTests.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             FormattableString outputDetails = $"{colorName}_A({alpha})_T({thickness}){aa}";
             
             provider.RunValidatingProcessorTest(
-                c => c.DrawPolygon(options, color.ToPixel<TPixel>(), thickness, simplePath),
+                c => c.DrawPolygon(options, color, thickness, simplePath),
                 outputDetails,
                 appendSourceFileOrDescription: false);
         }
diff --git a/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
index 3887cb9a7a..d6c85cd1d6 100644
--- a/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillComplexPolygonTests.cs
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             }
 
             provider.RunValidatingProcessorTest(
-                x => x.Fill(color.ToPixel<TPixel>(), clipped),
+                x => x.Fill(color, clipped),
                 testDetails,
                 appendPixelTypeToFileName: false,
                 appendSourceFileOrDescription: false);
diff --git a/tests/ImageSharp.Tests/Drawing/FillEllipticGradientBrushTest.cs b/tests/ImageSharp.Tests/Drawing/FillEllipticGradientBrushTest.cs
index fa4d4a709f..c61f770c9f 100644
--- a/tests/ImageSharp.Tests/Drawing/FillEllipticGradientBrushTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillEllipticGradientBrushTest.cs
@@ -23,18 +23,18 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            TPixel red = NamedColors<TPixel>.Red;
+            Color red = Color.Red;
 
             using (Image<TPixel> image = provider.GetImage())
             {
                 var unicolorLinearGradientBrush =
-                    new EllipticGradientBrush<TPixel>(
+                    new EllipticGradientBrush(
                         new SixLabors.Primitives.Point(0, 0),
                         new SixLabors.Primitives.Point(10, 0),
                         1.0f,
                         GradientRepetitionMode.None,
-                        new ColorStop<TPixel>(0, red),
-                        new ColorStop<TPixel>(1, red));
+                        new ColorStop(0, red),
+                        new ColorStop(1, red));
 
                 image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
 
@@ -58,22 +58,22 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             float ratio)
             where TPixel : struct, IPixel<TPixel>
         {
-            TPixel yellow = NamedColors<TPixel>.Yellow;
-            TPixel red = NamedColors<TPixel>.Red;
-            TPixel black = NamedColors<TPixel>.Black;
+            Color yellow = Color.Yellow;
+            Color red = Color.Red;
+            Color black = Color.Black;
 
             provider.VerifyOperation(
                 TolerantComparer,
                 image =>
                     {
-                        var unicolorLinearGradientBrush = new EllipticGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new EllipticGradientBrush(
                             new SixLabors.Primitives.Point(image.Width / 2, image.Height / 2),
                             new SixLabors.Primitives.Point(image.Width / 2, (image.Width * 2) / 3),
                             ratio,
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, yellow),
-                            new ColorStop<TPixel>(1, red),
-                            new ColorStop<TPixel>(1, black));
+                            new ColorStop(0, yellow),
+                            new ColorStop(1, red),
+                            new ColorStop(1, black));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                     },
@@ -114,9 +114,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 TolerantComparer,
                 image =>
                     {
-                        TPixel yellow = NamedColors<TPixel>.Yellow;
-                        TPixel red = NamedColors<TPixel>.Red;
-                        TPixel black = NamedColors<TPixel>.Black;
+                        Color yellow = Color.Yellow;
+                        Color red = Color.Red;
+                        Color black = Color.Black;
 
                         var center = new SixLabors.Primitives.Point(image.Width / 2, image.Height / 2);
 
@@ -128,14 +128,14 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                         int axisX = center.X + (int)-(offsetY * sin);
                         int axisY = center.Y + (int)(offsetY * cos);
 
-                        var unicolorLinearGradientBrush = new EllipticGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new EllipticGradientBrush(
                             center,
                             new SixLabors.Primitives.Point(axisX, axisY),
                             ratio,
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, yellow),
-                            new ColorStop<TPixel>(1, red),
-                            new ColorStop<TPixel>(1, black));
+                            new ColorStop(0, yellow),
+                            new ColorStop(1, red),
+                            new ColorStop(1, black));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                     },
diff --git a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
index 0f4a98a24a..5d1442e79c 100644
--- a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
@@ -29,14 +29,14 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                TPixel red = NamedColors<TPixel>.Red;
+                Color red = Color.Red;
 
-                var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                var unicolorLinearGradientBrush = new LinearGradientBrush(
                     new SixLabors.Primitives.Point(0, 0),
                     new SixLabors.Primitives.Point(10, 0),
                     GradientRepetitionMode.None,
-                    new ColorStop<TPixel>(0, red),
-                    new ColorStop<TPixel>(1, red));
+                    new ColorStop(0, red),
+                    new ColorStop(1, red));
 
                 image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
 
@@ -58,12 +58,12 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 TolerantComparer,
                 image =>
                     {
-                        var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new LinearGradientBrush(
                             new SixLabors.Primitives.Point(0, 0),
                             new SixLabors.Primitives.Point(image.Width, 0),
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, NamedColors<TPixel>.Blue),
-                            new ColorStop<TPixel>(1, NamedColors<TPixel>.Yellow));
+                            new ColorStop(0, Color.Blue),
+                            new ColorStop(1, Color.Yellow));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                     },
@@ -79,15 +79,15 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 TolerantComparer,
                 image =>
                     {
-                        TPixel red = NamedColors<TPixel>.Red;
-                        TPixel yellow = NamedColors<TPixel>.Yellow;
+                        Color red = Color.Red;
+                        Color yellow = Color.Yellow;
 
-                        var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new LinearGradientBrush(
                             new SixLabors.Primitives.Point(0, 0),
                             new SixLabors.Primitives.Point(image.Width, 0),
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, red),
-                            new ColorStop<TPixel>(1, yellow));
+                            new ColorStop(0, red),
+                            new ColorStop(1, yellow));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                     },
@@ -109,15 +109,15 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 TolerantComparer,
                 image =>
                     {
-                        TPixel red = NamedColors<TPixel>.Red;
-                        TPixel yellow = NamedColors<TPixel>.Yellow;
+                        Color red = Color.Red;
+                        Color yellow = Color.Yellow;
 
-                        var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new LinearGradientBrush(
                             new SixLabors.Primitives.Point(0, 0),
                             new SixLabors.Primitives.Point(image.Width / 10, 0),
                             repetitionMode,
-                            new ColorStop<TPixel>(0, red),
-                            new ColorStop<TPixel>(1, yellow));
+                            new ColorStop(0, red),
+                            new ColorStop(1, yellow));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                     },
@@ -140,26 +140,26 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             // ensure the input data is valid
             Assert.True(pattern.Length > 0);
 
-            TPixel black = NamedColors<TPixel>.Black;
-            TPixel white = NamedColors<TPixel>.White;
+            Color black = Color.Black;
+            Color white = Color.White;
 
             // create the input pattern: 0, followed by each of the arguments twice, followed by 1.0 - toggling black and white.
-            ColorStop<TPixel>[] colorStops =
-                Enumerable.Repeat(new ColorStop<TPixel>(0, black), 1)
+            ColorStop[] colorStops =
+                Enumerable.Repeat(new ColorStop(0, black), 1)
                 .Concat(
                         pattern
                             .SelectMany((f, index) => new[]
                                                       {
-                                                          new ColorStop<TPixel>(f, index % 2 == 0 ? black : white),
-                                                          new ColorStop<TPixel>(f, index % 2 == 0 ? white : black)
+                                                          new ColorStop(f, index % 2 == 0 ? black : white),
+                                                          new ColorStop(f, index % 2 == 0 ? white : black)
                                                       }))
-                .Concat(Enumerable.Repeat(new ColorStop<TPixel>(1, pattern.Length % 2 == 0 ? black : white), 1))
+                .Concat(Enumerable.Repeat(new ColorStop(1, pattern.Length % 2 == 0 ? black : white), 1))
                 .ToArray();
 
             using (Image<TPixel> image = provider.GetImage())
             {
                 var unicolorLinearGradientBrush =
-                    new LinearGradientBrush<TPixel>(
+                    new LinearGradientBrush(
                         new SixLabors.Primitives.Point(0, 0),
                         new SixLabors.Primitives.Point(image.Width, 0),
                         GradientRepetitionMode.None,
@@ -196,15 +196,15 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             provider.VerifyOperation(
                 image =>
                     {
-                        TPixel red = NamedColors<TPixel>.Red;
-                        TPixel yellow = NamedColors<TPixel>.Yellow;
+                        Color red = Color.Red;
+                        Color yellow = Color.Yellow;
 
-                        var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                        var unicolorLinearGradientBrush = new LinearGradientBrush(
                             new SixLabors.Primitives.Point(0, 0),
                             new SixLabors.Primitives.Point(0, image.Height),
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, red),
-                            new ColorStop<TPixel>(1, yellow));
+                            new ColorStop(0, red),
+                            new ColorStop(1, yellow));
 
                         image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
 
@@ -254,16 +254,16 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 int endX = image.Height - startX - 1;
                 int endY = image.Width - startY - 1;
 
-                TPixel red = NamedColors<TPixel>.Red;
-                TPixel yellow = NamedColors<TPixel>.Yellow;
+                Color red = Color.Red;
+                Color yellow = Color.Yellow;
 
                 var unicolorLinearGradientBrush =
-                    new LinearGradientBrush<TPixel>(
+                    new LinearGradientBrush(
                         new SixLabors.Primitives.Point(startX, startY),
                         new SixLabors.Primitives.Point(endX, endY),
                         GradientRepetitionMode.None,
-                        new ColorStop<TPixel>(0, red),
-                        new ColorStop<TPixel>(1, yellow));
+                        new ColorStop(0, red),
+                        new ColorStop(1, yellow));
 
                 image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
                 image.DebugSave(
@@ -310,22 +310,21 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             int[] stopColorCodes)
             where TPixel : struct, IPixel<TPixel>
         {
-            TPixel[] colors =
+            Color[] colors =
             {
-                NamedColors<TPixel>.Navy, NamedColors<TPixel>.LightGreen, NamedColors<TPixel>.Yellow,
-                NamedColors<TPixel>.Red
+                Color.Navy, Color.LightGreen, Color.Yellow,
+                Color.Red
             };
 
             var coloringVariant = new StringBuilder();
-            var colorStops = new ColorStop<TPixel>[stopPositions.Length];
+            var colorStops = new ColorStop[stopPositions.Length];
 
             for (int i = 0; i < stopPositions.Length; i++)
             {
-                TPixel color = colors[stopColorCodes[i % colors.Length]];
+                Color color = colors[stopColorCodes[i % colors.Length]];
                 float position = stopPositions[i];
-                colorStops[i] = new ColorStop<TPixel>(position, color);
-                Rgba32 rgba = default;
-                color.ToRgba32(ref rgba);
+                colorStops[i] = new ColorStop(position, color);
+                Rgba32 rgba = color;
                 coloringVariant.AppendFormat(CultureInfo.InvariantCulture, "{0}@{1};", rgba.ToHex(), position);
             }
 
@@ -334,7 +333,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             provider.VerifyOperation(
                 image =>
                 {
-                    var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                    var unicolorLinearGradientBrush = new LinearGradientBrush(
                         new SixLabors.Primitives.Point(startX, startY),
                         new SixLabors.Primitives.Point(endX, endY),
                         GradientRepetitionMode.None,
@@ -357,22 +356,21 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             int[] stopColorCodes)
             where TPixel : struct, IPixel<TPixel>
         {
-            TPixel[] colors =
+            Color[] colors =
             {
-                NamedColors<TPixel>.Black, NamedColors<TPixel>.Blue, NamedColors<TPixel>.Red,
-                NamedColors<TPixel>.White, NamedColors<TPixel>.Lime
+                Color.Black, Color.Blue, Color.Red,
+                Color.White, Color.Lime
             };
 
             var coloringVariant = new StringBuilder();
-            var colorStops = new ColorStop<TPixel>[stopPositions.Length];
+            var colorStops = new ColorStop[stopPositions.Length];
 
             for (int i = 0; i < stopPositions.Length; i++)
             {
-                TPixel color = colors[stopColorCodes[i % colors.Length]];
+                Color color = colors[stopColorCodes[i % colors.Length]];
                 float position = stopPositions[i];
-                colorStops[i] = new ColorStop<TPixel>(position, color);
-                Rgba32 rgba = default;
-                color.ToRgba32(ref rgba);
+                colorStops[i] = new ColorStop(position, color);
+                Rgba32 rgba = color;
                 coloringVariant.AppendFormat(CultureInfo.InvariantCulture, "{0}@{1};", rgba.ToHex(), position);
             }
 
@@ -381,7 +379,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             provider.VerifyOperation(
                 image =>
                 {
-                    var unicolorLinearGradientBrush = new LinearGradientBrush<TPixel>(
+                    var unicolorLinearGradientBrush = new LinearGradientBrush(
                         new SixLabors.Primitives.Point(startX, startY),
                         new SixLabors.Primitives.Point(endX, endY),
                         GradientRepetitionMode.None,
diff --git a/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
index dcc689fe1c..647f285103 100644
--- a/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillPatternBrushTests.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 {
     public class FillPatternBrushTests
     {
-        private void Test(string name, Rgba32 background, IBrush<Rgba32> brush, Rgba32[,] expectedPattern)
+        private void Test(string name, Rgba32 background, IBrush brush, Rgba32[,] expectedPattern)
         {
             string path = TestEnvironment.CreateOutputDirectory("Drawing", "FillPatternBrushTests");
             using (var image = new Image<Rgba32>(20, 20))
diff --git a/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
index 43029e6957..f84d2b31c9 100644
--- a/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             FormattableString outputDetails = $"{colorName}_A{alpha}{aa}";
             
             provider.RunValidatingProcessorTest(
-                c => c.FillPolygon(options, color.ToPixel<TPixel>(), simplePath),
+                c => c.FillPolygon(options, color, simplePath),
                 outputDetails,
                 appendSourceFileOrDescription: false);
         }
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             Color color = Color.LightGreen;
 
             provider.RunValidatingProcessorTest(
-                c => c.FillPolygon(color.ToPixel<TPixel>(), points),
+                c => c.FillPolygon(color, points),
                 appendSourceFileOrDescription: false,
                 appendPixelTypeToFileName: false);
         }
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 };
             Color color = Color.Yellow;
 
-            var brush = Brushes.Horizontal(color.ToPixel<TPixel>());
+            var brush = Brushes.Horizontal(color);
             
             provider.RunValidatingProcessorTest(
                 c => c.FillPolygon(brush, simplePath),
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             Color color = Color.White;
 
             provider.RunValidatingProcessorTest(
-                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                c => c.Fill(color, polygon),
                 appendSourceFileOrDescription: false);    
         }
         
@@ -132,7 +132,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             FormattableString testOutput = $"V({vertices})_R({radius})_Ang({angleDeg})";
             provider.RunValidatingProcessorTest(
-                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                c => c.Fill(color, polygon),
                 testOutput,
                 appendSourceFileOrDescription: false,
                 appendPixelTypeToFileName: false);
@@ -147,7 +147,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             Color color = Color.Azure;
 
             provider.RunValidatingProcessorTest(
-                c => c.Fill(color.ToPixel<TPixel>(), polygon),
+                c => c.Fill(color, polygon),
                 appendSourceFileOrDescription: false,
                 appendPixelTypeToFileName: false);
         }
diff --git a/tests/ImageSharp.Tests/Drawing/FillRadialGradientBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillRadialGradientBrushTests.cs
index 7461347de1..818340dd22 100644
--- a/tests/ImageSharp.Tests/Drawing/FillRadialGradientBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillRadialGradientBrushTests.cs
@@ -21,15 +21,15 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                TPixel red = NamedColors<TPixel>.Red;
+                Color red = Color.Red;
 
                 var unicolorRadialGradientBrush =
-                    new RadialGradientBrush<TPixel>(
+                    new RadialGradientBrush(
                         new SixLabors.Primitives.Point(0, 0),
                         100,
                         GradientRepetitionMode.None,
-                        new ColorStop<TPixel>(0, red),
-                        new ColorStop<TPixel>(1, red));
+                        new ColorStop(0, red),
+                        new ColorStop(1, red));
 
                 image.Mutate(x => x.Fill(unicolorRadialGradientBrush));
 
@@ -56,12 +56,12 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 TolerantComparer,
                 image =>
                     {
-                        var brush = new RadialGradientBrush<TPixel>(
+                        var brush = new RadialGradientBrush(
                             new SixLabors.Primitives.Point(centerX, centerY),
                             image.Width / 2f,
                             GradientRepetitionMode.None,
-                            new ColorStop<TPixel>(0, NamedColors<TPixel>.Red),
-                            new ColorStop<TPixel>(1, NamedColors<TPixel>.Yellow));
+                            new ColorStop(0, Color.Red),
+                            new ColorStop(1, Color.Yellow));
 
                         image.Mutate(x => x.Fill(brush));
                     },
diff --git a/tests/ImageSharp.Tests/Drawing/FillRegionProcessorTests.cs b/tests/ImageSharp.Tests/Drawing/FillRegionProcessorTests.cs
index dc7da35433..bb78054a4d 100644
--- a/tests/ImageSharp.Tests/Drawing/FillRegionProcessorTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillRegionProcessorTests.cs
@@ -8,6 +8,7 @@ using System;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.Primitives;
 using Xunit;
 using SixLabors.ImageSharp.Processing.Processors.Drawing;
@@ -30,14 +31,14 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             var bounds = new Rectangle(0, 0, 1, 1);
 
-            var brush = new Mock<IBrush<Rgba32>>();
+            var brush = new Mock<IBrush>();
             var region = new MockRegion2(bounds);
 
             var options = new GraphicsOptions(antialias)
             {
                 AntialiasSubpixelDepth = 1
             };
-            var processor = new FillRegionProcessor<Rgba32>(brush.Object, region, options);
+            var processor = new FillRegionProcessor(brush.Object, region, options);
             var img = new Image<Rgba32>(1, 1);
             processor.Apply(img, bounds);
 
@@ -48,9 +49,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         public void FillOffCanvas()
         {
             var bounds = new Rectangle(-100, -10, 10, 10);
-            var brush = new Mock<IBrush<Rgba32>>();
+            var brush = new Mock<IBrush>();
             var options = new GraphicsOptions(true);
-            var processor = new FillRegionProcessor<Rgba32>(brush.Object, new MockRegion1(), options);
+            var processor = new FillRegionProcessor(brush.Object, new MockRegion1(), options);
             var img = new Image<Rgba32>(10, 10);
             processor.Apply(img, bounds);
         }
@@ -61,7 +62,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (var img = new Image<Rgba32>(10, 10))
             {
-                img.Mutate(x => x.DrawLines(new Pen<Rgba32>(Rgba32.Black, 10), new SixLabors.Primitives.PointF[] {
+                img.Mutate(x => x.DrawLines(new Pen(Rgba32.Black, 10), new SixLabors.Primitives.PointF[] {
                     new Vector2(-10, 5),
                     new Vector2(20, 5),
                 }));
diff --git a/tests/ImageSharp.Tests/Drawing/FillSolidBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillSolidBrushTests.cs
index 639b3fe81a..358552bf81 100644
--- a/tests/ImageSharp.Tests/Drawing/FillSolidBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillSolidBrushTests.cs
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                TPixel color = NamedColors<TPixel>.HotPink;
+                Color color = Color.HotPink;
                 image.Mutate(c => c.Fill(color));
 
                 image.DebugSave(provider, appendPixelTypeToFileName: false);
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                TPixel color = NamedColors<TPixel>.HotPink;
+                Color color = Color.HotPink;
                 image.Mutate(c => c.Fill(color));
 
                 image.DebugSave(provider, appendSourceFileOrDescription: false);
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (Image<TPixel> image = provider.GetImage())
             {
-                TPixel color = TestUtils.GetPixelOfNamedColor<TPixel>(newColorName);
+                Color color = TestUtils.GetColorByName(newColorName);
                 image.Mutate(c => c.Fill(color));
 
                 image.DebugSave(
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             FormattableString testDetails = $"(x{x0},y{y0},w{w},h{h})";
             var region = new RectangleF(x0, y0, w, h);
-            TPixel color = TestUtils.GetPixelOfNamedColor<TPixel>("Blue");
+            Color color = TestUtils.GetColorByName("Blue");
 
             provider.RunValidatingProcessorTest(c => c.Fill(color, region), testDetails, ImageComparer.Exact);
         }
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             FormattableString testDetails = $"(x{x0},y{y0},w{w},h{h})";
             var region = new RectangleF(x0, y0, w, h);
-            TPixel color = TestUtils.GetPixelOfNamedColor<TPixel>("Blue");
+            Color color = TestUtils.GetColorByName("Blue");
 
             provider.RunValidatingProcessorTestOnWrappedMemoryImage(
                 c => c.Fill(color, region),
@@ -150,11 +150,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             float blendPercentage)
             where TPixel : struct, IPixel<TPixel>
         {
-            var vec = TestUtils.GetPixelOfNamedColor<RgbaVector>(newColorName).ToVector4();
-            vec.W = alpha;
-
-            TPixel fillColor = default;
-            fillColor.FromVector4(vec);
+            Color fillColor = TestUtils.GetColorByName(newColorName).WithAlpha(alpha);
 
             using (Image<TPixel> image = provider.GetImage())
             {
@@ -169,11 +165,11 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 {
                     var region = new ShapeRegion(new RectangularPolygon(0, 0, 16, 16));
 
-                    image.Mutate(c => c.Fill(options, new SolidBrush<TPixel>(fillColor), region));
+                    image.Mutate(c => c.Fill(options, new SolidBrush(fillColor), region));
                 }
                 else
                 {
-                    image.Mutate(c => c.Fill(options, new SolidBrush<TPixel>(fillColor)));
+                    image.Mutate(c => c.Fill(options, new SolidBrush(fillColor)));
                 }
 
                 var testOutputDetails = new
@@ -194,7 +190,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 PixelBlender<TPixel> blender = PixelOperations<TPixel>.Instance.GetPixelBlender(
                     blenderMode,
                     PixelAlphaCompositionMode.SrcOver);
-                TPixel expectedPixel = blender.Blend(bgColor, fillColor, blendPercentage);
+                TPixel expectedPixel = blender.Blend(bgColor, fillColor.ToPixel<TPixel>(), blendPercentage);
 
                 image.ComparePixelBufferTo(expectedPixel);
             }
diff --git a/tests/ImageSharp.Tests/Drawing/Paths/DrawPathCollection.cs b/tests/ImageSharp.Tests/Drawing/Paths/DrawPathCollection.cs
index 326517a4e1..5ab7894355 100644
--- a/tests/ImageSharp.Tests/Drawing/Paths/DrawPathCollection.cs
+++ b/tests/ImageSharp.Tests/Drawing/Paths/DrawPathCollection.cs
@@ -14,8 +14,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
     public class DrawPathCollection : BaseImageOperationsExtensionTest
     {
         GraphicsOptions noneDefault = new GraphicsOptions();
-        Rgba32 color = Rgba32.HotPink;
-        Pen<Rgba32> pen = Pens.Solid(Rgba32.HotPink, 1);
+        Color color = Color.HotPink;
+        Pen pen = Pens.Solid(Rgba32.HotPink, 1);
         IPath path1 = new Path(new LinearLineSegment(new SixLabors.Primitives.PointF[] {
                     new Vector2(10,10),
                     new Vector2(20,10),
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(this.noneDefault, processor.Options);
 
@@ -81,14 +81,14 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(GraphicsOptions.Default, processor.Options);
 
                 ShapePath region = Assert.IsType<ShapePath>(processor.Region);
                 ComplexPolygon polygon = Assert.IsType<ComplexPolygon>(region.Shape);
 
-                SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+                SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
                 Assert.Equal(this.color, brush.Color);
             }
         }
@@ -100,14 +100,14 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(this.noneDefault, processor.Options);
 
                 ShapePath region = Assert.IsType<ShapePath>(processor.Region);
                 ComplexPolygon polygon = Assert.IsType<ComplexPolygon>(region.Shape);
 
-                SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+                SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
                 Assert.Equal(this.color, brush.Color);
             }
         }
diff --git a/tests/ImageSharp.Tests/Drawing/Paths/FillPath.cs b/tests/ImageSharp.Tests/Drawing/Paths/FillPath.cs
index e72fbbdf24..d65dcd8c64 100644
--- a/tests/ImageSharp.Tests/Drawing/Paths/FillPath.cs
+++ b/tests/ImageSharp.Tests/Drawing/Paths/FillPath.cs
@@ -14,8 +14,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
     public class FillPath : BaseImageOperationsExtensionTest
     {
         GraphicsOptions noneDefault = new GraphicsOptions();
-        Rgba32 color = Rgba32.HotPink;
-        SolidBrush<Rgba32> brush = Brushes.Solid(Rgba32.HotPink);
+        Color color = Color.HotPink;
+        SolidBrush brush = Brushes.Solid(Rgba32.HotPink);
         IPath path = new Path(new LinearLineSegment(new SixLabors.Primitives.PointF[] {
                     new Vector2(10,10),
                     new Vector2(20,10),
@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsBrushAndPath()
         {
             this.operations.Fill(this.brush, this.path);
-            var processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            var processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsBrushPathOptions()
         {
             this.operations.Fill(this.noneDefault, this.brush, this.path);
-            var processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            var processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorAndPath()
         {
             this.operations.Fill(this.color, this.path);
-            var processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            var processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Polygon polygon = Assert.IsType<Polygon>(region.Shape);
             LinearLineSegment segments = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
 
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorPathAndOptions()
         {
             this.operations.Fill(this.noneDefault, this.color, this.path);
-            var processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            var processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Polygon polygon = Assert.IsType<Polygon>(region.Shape);
             LinearLineSegment segments = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
     }
diff --git a/tests/ImageSharp.Tests/Drawing/Paths/FillPathCollection.cs b/tests/ImageSharp.Tests/Drawing/Paths/FillPathCollection.cs
index ec7a5a20c8..1f8e2d423d 100644
--- a/tests/ImageSharp.Tests/Drawing/Paths/FillPathCollection.cs
+++ b/tests/ImageSharp.Tests/Drawing/Paths/FillPathCollection.cs
@@ -14,8 +14,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
     public class FillPathCollection : BaseImageOperationsExtensionTest
     {
         GraphicsOptions noneDefault = new GraphicsOptions();
-        Rgba32 color = Rgba32.HotPink;
-        SolidBrush<Rgba32> brush = Brushes.Solid(Rgba32.HotPink);
+        Color color = Color.HotPink;
+        SolidBrush brush = Brushes.Solid(Rgba32.HotPink);
         IPath path1 = new Path(new LinearLineSegment(new SixLabors.Primitives.PointF[] {
                     new Vector2(10,10),
                     new Vector2(20,10),
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -64,7 +64,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(this.noneDefault, processor.Options);
 
@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -91,7 +91,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
                 Polygon polygon = Assert.IsType<Polygon>(region.Shape);
                 LinearLineSegment segments = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-                SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+                SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
                 Assert.Equal(this.color, brush.Color);
             }
         }
@@ -103,7 +103,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
 
             for (int i = 0; i < 2; i++)
             {
-                FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>(i);
+                FillRegionProcessor processor = this.Verify<FillRegionProcessor>(i);
 
                 Assert.Equal(this.noneDefault, processor.Options);
 
@@ -111,7 +111,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
                 Polygon polygon = Assert.IsType<Polygon>(region.Shape);
                 LinearLineSegment segments = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-                SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+                SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
                 Assert.Equal(this.color, brush.Color);
             }
         }
diff --git a/tests/ImageSharp.Tests/Drawing/Paths/FillPolygon.cs b/tests/ImageSharp.Tests/Drawing/Paths/FillPolygon.cs
index d8927a4683..b270a03cfc 100644
--- a/tests/ImageSharp.Tests/Drawing/Paths/FillPolygon.cs
+++ b/tests/ImageSharp.Tests/Drawing/Paths/FillPolygon.cs
@@ -14,8 +14,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
     public class FillPolygon : BaseImageOperationsExtensionTest
     {
         GraphicsOptions noneDefault = new GraphicsOptions();
-        Rgba32 color = Rgba32.HotPink;
-        SolidBrush<Rgba32> brush = Brushes.Solid(Rgba32.HotPink);
+        Color color = Color.HotPink;
+        SolidBrush brush = Brushes.Solid(Rgba32.HotPink);
         SixLabors.Primitives.PointF[] path = {
                     new Vector2(10,10),
                     new Vector2(20,10),
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         {
             this.operations.FillPolygon(this.brush, this.path);
 
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsBrushPathAndOptions()
         {
             this.operations.FillPolygon(this.noneDefault, this.brush, this.path);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorAndPath()
         {
             this.operations.FillPolygon(this.color, this.path);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
@@ -68,7 +68,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Polygon polygon = Assert.IsType<Polygon>(region.Shape);
             LinearLineSegment segemnt = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
 
@@ -76,7 +76,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorPathAndOptions()
         {
             this.operations.FillPolygon(this.noneDefault, this.color, this.path);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -84,7 +84,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Polygon polygon = Assert.IsType<Polygon>(region.Shape);
             LinearLineSegment segemnt = Assert.IsType<LinearLineSegment>(polygon.LineSegments[0]);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
     }
diff --git a/tests/ImageSharp.Tests/Drawing/Paths/FillRectangle.cs b/tests/ImageSharp.Tests/Drawing/Paths/FillRectangle.cs
index 8f648e425f..6cb052aa8f 100644
--- a/tests/ImageSharp.Tests/Drawing/Paths/FillRectangle.cs
+++ b/tests/ImageSharp.Tests/Drawing/Paths/FillRectangle.cs
@@ -12,15 +12,15 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
     public class FillRectangle : BaseImageOperationsExtensionTest
     {
         GraphicsOptions noneDefault = new GraphicsOptions();
-        Rgba32 color = Rgba32.HotPink;
-        SolidBrush<Rgba32> brush = Brushes.Solid(Rgba32.HotPink);
+        Color color = Color.HotPink;
+        SolidBrush brush = Brushes.Solid(Rgba32.HotPink);
         SixLabors.Primitives.Rectangle rectangle = new SixLabors.Primitives.Rectangle(10, 10, 77, 76);
 
         [Fact]
         public void CorrectlySetsBrushAndRectangle()
         {
             this.operations.Fill(this.brush, this.rectangle);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsBrushRectangleAndOptions()
         {
             this.operations.Fill(this.noneDefault, this.brush, this.rectangle);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -56,7 +56,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorAndRectangle()
         {
             this.operations.Fill(this.color, this.rectangle);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(GraphicsOptions.Default, processor.Options);
 
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Assert.Equal(rect.Size.Width, this.rectangle.Width);
             Assert.Equal(rect.Size.Height, this.rectangle.Height);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
 
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
         public void CorrectlySetsColorRectangleAndOptions()
         {
             this.operations.Fill(this.noneDefault, this.color, this.rectangle);
-            FillRegionProcessor<Rgba32> processor = this.Verify<FillRegionProcessor<Rgba32>>();
+            FillRegionProcessor processor = this.Verify<FillRegionProcessor>();
 
             Assert.Equal(this.noneDefault, processor.Options);
 
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Paths
             Assert.Equal(rect.Size.Width, this.rectangle.Width);
             Assert.Equal(rect.Size.Height, this.rectangle.Height);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
             Assert.Equal(this.color, brush.Color);
         }
     }
diff --git a/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
index 461ca700f7..fae0bf72b4 100644
--- a/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/RecolorImageTests.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             Color sourceColor = TestUtils.GetColorByName(sourceColorName);
             Color targetColor = TestUtils.GetColorByName(targetColorName);
-            var brush = new RecolorBrush<TPixel>(sourceColor.ToPixel<TPixel>(), targetColor.ToPixel<TPixel>(), threshold);
+            var brush = new RecolorBrush(sourceColor, targetColor, threshold);
 
             FormattableString testInfo = $"{sourceColorName}-{targetColorName}-{threshold}";
             provider.RunValidatingProcessorTest(x => x.Fill(brush), testInfo);
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             Color sourceColor = TestUtils.GetColorByName(sourceColorName);
             Color targetColor = TestUtils.GetColorByName(targetColorName);
-            var brush = new RecolorBrush<TPixel>(sourceColor.ToPixel<TPixel>(), targetColor.ToPixel<TPixel>(), threshold);
+            var brush = new RecolorBrush(sourceColor, targetColor, threshold);
 
             FormattableString testInfo = $"{sourceColorName}-{targetColorName}-{threshold}";
             provider.RunValidatingProcessorTest(x =>
diff --git a/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs b/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
index e8f53de010..fd8713cccd 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidBezierTests.cs
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             using (Image<TPixel> image = provider.GetImage())
             {
                 image.Mutate(x => x.BackgroundColor(blue));
-                image.Mutate(x => x.Fill(hotPink.ToPixel<TPixel>(), new Polygon(new CubicBezierLineSegment(simplePath))));
+                image.Mutate(x => x.Fill(hotPink, new Polygon(new CubicBezierLineSegment(simplePath))));
                 image.DebugSave(provider);
                 image.CompareToReferenceOutput(provider);
             }
diff --git a/tests/ImageSharp.Tests/Drawing/SolidFillBlendedShapesTests.cs b/tests/ImageSharp.Tests/Drawing/SolidFillBlendedShapesTests.cs
index 94e12f8581..c34d50297a 100644
--- a/tests/ImageSharp.Tests/Drawing/SolidFillBlendedShapesTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/SolidFillBlendedShapesTests.cs
@@ -43,11 +43,11 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 int scaleY = img.Height / 100;
                 img.Mutate(
                     x => x.Fill(
-                            NamedColors<TPixel>.DarkBlue,
+                            Color.DarkBlue,
                             new Rectangle(0 * scaleX, 40 * scaleY, 100 * scaleX, 20 * scaleY)
                             )
                         .Fill(new GraphicsOptions(true) { ColorBlendingMode = blending, AlphaCompositionMode=composition },
-                            NamedColors<TPixel>.HotPink,
+                            Color.HotPink,
                             new Rectangle(20 * scaleX, 0 * scaleY, 30 * scaleX, 100 * scaleY))
                     );
 
@@ -69,17 +69,17 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 int scaleY = img.Height / 100;
                 img.Mutate(
                     x => x.Fill(
-                        NamedColors<TPixel>.DarkBlue,
+                        Color.DarkBlue,
                         new Rectangle(0 * scaleX, 40 * scaleY, 100 * scaleX, 20 * scaleY)));
                 img.Mutate(
                     x => x.Fill(
                         new GraphicsOptions(true) { ColorBlendingMode = blending, AlphaCompositionMode = composition },
-                        NamedColors<TPixel>.HotPink,
+                        Color.HotPink,
                         new Rectangle(20 * scaleX, 0 * scaleY, 30 * scaleX, 100 * scaleY)));
                 img.Mutate(
                     x => x.Fill(
                         new GraphicsOptions(true) { ColorBlendingMode = blending, AlphaCompositionMode = composition },
-                        NamedColors<TPixel>.Transparent,
+                        Color.Transparent,
                         new Shapes.EllipsePolygon(40 * scaleX, 50 * scaleY, 50 * scaleX, 50 * scaleY))
                     );
 
@@ -101,22 +101,20 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 int scaleY = (img.Height / 100);
                 img.Mutate(
                     x => x.Fill(
-                        NamedColors<TPixel>.DarkBlue,
+                        Color.DarkBlue,
                         new Rectangle(0 * scaleX, 40, 100 * scaleX, 20 * scaleY)));
                 img.Mutate(
                     x => x.Fill(
                         new GraphicsOptions(true) { ColorBlendingMode = blending, AlphaCompositionMode = composition },
-                        NamedColors<TPixel>.HotPink,
+                        Color.HotPink,
                         new Rectangle(20 * scaleX, 0, 30 * scaleX, 100 * scaleY)));
-                var c = NamedColors<TPixel>.Red.ToVector4();
-                c.W *= 0.5f;
-                var pixel = default(TPixel);
-                pixel.FromVector4(c);
+
+                var transparentRed = Color.Red.WithAlpha(0.5f);
 
                 img.Mutate(
                     x => x.Fill(
                         new GraphicsOptions(true) { ColorBlendingMode = blending, AlphaCompositionMode = composition },
-                        pixel,
+                        transparentRed,
                         new Shapes.EllipsePolygon(40 * scaleX, 50 * scaleY, 50 * scaleX, 50 * scaleY))
                     );
 
@@ -139,12 +137,12 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
                 dstImg.Mutate(
                     x => x.Fill(
-                        NamedColors<TPixel>.DarkBlue,
+                        Color.DarkBlue,
                         new Rectangle(0 * scaleX, 40 * scaleY, 100 * scaleX, 20 * scaleY)));
 
                 srcImg.Mutate(
                     x => x.Fill(
-                        NamedColors<TPixel>.Black,
+                        Color.Black,
                         new Shapes.EllipsePolygon(40 * scaleX, 50 * scaleY, 50 * scaleX, 50 * scaleY)));
 
                 dstImg.Mutate(
diff --git a/tests/ImageSharp.Tests/Drawing/Text/DrawText.cs b/tests/ImageSharp.Tests/Drawing/Text/DrawText.cs
index 76f40e0aca..8520a2f3fb 100644
--- a/tests/ImageSharp.Tests/Drawing/Text/DrawText.cs
+++ b/tests/ImageSharp.Tests/Drawing/Text/DrawText.cs
@@ -14,9 +14,9 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
 {
     public class DrawText : BaseImageOperationsExtensionTest
     {
-        Rgba32 color = Rgba32.HotPink;
+        Rgba32 color = Color.HotPink;
 
-        SolidBrush<Rgba32> brush = Brushes.Solid(Rgba32.HotPink);
+        SolidBrush brush = Brushes.Solid(Color.HotPink);
 
         IPath path = new SixLabors.Shapes.Path(
             new LinearLineSegment(
@@ -39,57 +39,57 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
                 new TextGraphicsOptions(true),
                 "123",
                 this.Font,
-                Brushes.Solid(Rgba32.Red),
+                Brushes.Solid(Color.Red),
                 null,
                 Vector2.Zero);
 
-            this.Verify<DrawTextProcessor<Rgba32>>(0);
+            this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void FillsForEachACharachterWhenBrushSetAndNotPenDefaultOptions()
         {
-            this.operations.DrawText("123", this.Font, Brushes.Solid(Rgba32.Red), null, Vector2.Zero);
+            this.operations.DrawText("123", this.Font, Brushes.Solid(Color.Red), null, Vector2.Zero);
 
-            this.Verify<DrawTextProcessor<Rgba32>>(0);
+            this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void FillsForEachACharachterWhenBrushSet()
         {
-            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Brushes.Solid(Rgba32.Red), Vector2.Zero);
+            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Brushes.Solid(Color.Red), Vector2.Zero);
 
-            this.Verify<DrawTextProcessor<Rgba32>>(0);
+            this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void FillsForEachACharachterWhenBrushSetDefaultOptions()
         {
-            this.operations.DrawText("123", this.Font, Brushes.Solid(Rgba32.Red), Vector2.Zero);
+            this.operations.DrawText("123", this.Font, Brushes.Solid(Color.Red), Vector2.Zero);
 
-            this.Verify<DrawTextProcessor<Rgba32>>(0);
+            this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void FillsForEachACharachterWhenColorSet()
         {
-            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Rgba32.Red, Vector2.Zero);
+            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Color.Red, Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
-            Assert.Equal(Rgba32.Red, brush.Color);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
+            Assert.Equal(Color.Red, brush.Color);
         }
 
         [Fact]
         public void FillsForEachACharachterWhenColorSetDefaultOptions()
         {
-            this.operations.DrawText("123", this.Font, Rgba32.Red, Vector2.Zero);
+            this.operations.DrawText("123", this.Font, Color.Red, Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
 
-            SolidBrush<Rgba32> brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
-            Assert.Equal(Rgba32.Red, brush.Color);
+            SolidBrush brush = Assert.IsType<SolidBrush>(processor.Brush);
+            Assert.Equal(Color.Red, brush.Color);
         }
 
         [Fact]
@@ -100,39 +100,39 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
                 "123",
                 this.Font,
                 null,
-                Pens.Dash(Rgba32.Red, 1),
+                Pens.Dash(Color.Red, 1),
                 Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void DrawForEachACharachterWhenPenSetAndNotBrushDefaultOptions()
         {
-            this.operations.DrawText("123", this.Font, null, Pens.Dash(Rgba32.Red, 1), Vector2.Zero);
+            this.operations.DrawText("123", this.Font, null, Pens.Dash(Color.Red, 1), Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void DrawForEachACharachterWhenPenSet()
         {
-            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Pens.Dash(Rgba32.Red, 1), Vector2.Zero);
+            this.operations.DrawText(new TextGraphicsOptions(true), "123", this.Font, Pens.Dash(Color.Red, 1), Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
         }
 
         [Fact]
         public void DrawForEachACharachterWhenPenSetDefaultOptions()
         {
-            this.operations.DrawText("123", this.Font, Pens.Dash(Rgba32.Red, 1), Vector2.Zero);
+            this.operations.DrawText("123", this.Font, Pens.Dash(Color.Red, 1), Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
 
             Assert.Equal("123", processor.Text);
             Assert.Equal(this.Font, processor.Font);
-            var penBrush = Assert.IsType<SolidBrush<Rgba32>>(processor.Pen.StrokeFill);
-            Assert.Equal(Rgba32.Red, penBrush.Color);
+            var penBrush = Assert.IsType<SolidBrush>(processor.Pen.StrokeFill);
+            Assert.Equal(Color.Red, penBrush.Color);
             Assert.Equal(1, processor.Pen.StrokeWidth);
             Assert.Equal(PointF.Empty, processor.Location);
         }
@@ -144,19 +144,19 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
                 new TextGraphicsOptions(true),
                 "123",
                 this.Font,
-                Brushes.Solid(Rgba32.Red),
-                Pens.Dash(Rgba32.Red, 1),
+                Brushes.Solid(Color.Red),
+                Pens.Dash(Color.Red, 1),
                 Vector2.Zero);
 
-            var processor = this.Verify<DrawTextProcessor<Rgba32>>(0);
+            var processor = this.Verify<DrawTextProcessor>(0);
 
             Assert.Equal("123", processor.Text);
             Assert.Equal(this.Font, processor.Font);
-            var brush = Assert.IsType<SolidBrush<Rgba32>>(processor.Brush);
-            Assert.Equal(Rgba32.Red, brush.Color);
+            var brush = Assert.IsType<SolidBrush>(processor.Brush);
+            Assert.Equal(Color.Red, brush.Color);
             Assert.Equal(PointF.Empty, processor.Location);
-            var penBrush = Assert.IsType<SolidBrush<Rgba32>>(processor.Pen.StrokeFill);
-            Assert.Equal(Rgba32.Red, penBrush.Color);
+            var penBrush = Assert.IsType<SolidBrush>(processor.Pen.StrokeFill);
+            Assert.Equal(Color.Red, penBrush.Color);
             Assert.Equal(1, processor.Pen.StrokeWidth);
         }
     }
diff --git a/tests/ImageSharp.Tests/Drawing/Text/DrawTextOnImageTests.cs b/tests/ImageSharp.Tests/Drawing/Text/DrawTextOnImageTests.cs
index 20ccb25a54..ebd9cf6448 100644
--- a/tests/ImageSharp.Tests/Drawing/Text/DrawTextOnImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/Text/DrawTextOnImageTests.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
             where TPixel : struct, IPixel<TPixel>
         {
             Font font = CreateFont("OpenSans-Regular.ttf", 36);
-            TPixel color = NamedColors<TPixel>.Black;
+            Color color = Color.Black;
             float padding = 5;
             var text = "A short piece of text";
 
@@ -84,7 +84,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
             where TPixel : struct, IPixel<TPixel>
         {
             Font font = CreateFont(fontName, fontSize);
-            TPixel color = NamedColors<TPixel>.Black;
+            Color color = Color.Black;
 
             provider.VerifyOperation(
                 TextDrawingComparer,
@@ -129,7 +129,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
                 HorizontalAlignment = HorizontalAlignment.Left,
             };
 
-            TPixel color = NamedColors<TPixel>.Black;
+            Color color = Color.Black;
 
             // Based on the reported 0.0270% difference with AccuracyMultiple = 8
             // We should avoid quality regressions leading to higher difference!
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
             where TPixel : struct, IPixel<TPixel>
         {
             Font font = CreateFont(fontName, fontSize);
-            TPixel color = NamedColors<TPixel>.Black;
+            Color color = Color.Black;
 
             provider.VerifyOperation(
                 OutlinedTextDrawingComparer,
@@ -186,7 +186,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
             where TPixel : struct, IPixel<TPixel>
         {
             Font font = CreateFont(fontName, fontSize);
-            TPixel color = NamedColors<TPixel>.Black;
+            Color color = Color.Black;
 
             provider.VerifyOperation(
                 OutlinedTextDrawingComparer,
@@ -217,7 +217,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing.Text
             var comparer = ImageComparer.TolerantPercentage(0.2f);
 
             provider.RunValidatingProcessorTest(
-                x => x.DrawText(textOptions, text, font, NamedColors<TPixel>.Black, new PointF(10, 50)),
+                x => x.DrawText(textOptions, text, font, Color.Black, new PointF(10, 50)),
                 details,
                 comparer,
                 appendPixelTypeToFileName: false,
diff --git a/tests/ImageSharp.Tests/Issues/Issue412.cs b/tests/ImageSharp.Tests/Issues/Issue412.cs
index b0374ce1fa..f22d3a85cf 100644
--- a/tests/ImageSharp.Tests/Issues/Issue412.cs
+++ b/tests/ImageSharp.Tests/Issues/Issue412.cs
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Tests.Issues
                         {
                             context.DrawLines(
                                 new GraphicsOptions(false),
-                                NamedColors<TPixel>.Black,
+                                Color.Black,
                                 1,
                                 new[]
                                 {
@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp.Tests.Issues
 
                             context.DrawLines(
                                 new GraphicsOptions(false),
-                                NamedColors<TPixel>.Red,
+                                Color.Red,
                                 1,
                                 new[]
                                 {
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.Tests.Issues
                     for (var x = 0; x < 40; x++)
                     {
 
-                        Assert.True(NamedColors<TPixel>.Red.Equals(image[x, y]), $"expected {NamedColors<TPixel>.Red} but found {image[x, y]} at [{x}, {y}]");
+                        Assert.True(Color.Red.Equals(image[x, y]), $"expected {Color.Red} but found {image[x, y]} at [{x}, {y}]");
                     }
                 }
             }
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
index 1ff95f60d0..88b30ce34e 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/SolidProvider.cs
@@ -53,8 +53,7 @@ namespace SixLabors.ImageSharp.Tests
             public override Image<TPixel> GetImage()
             {
                 Image<TPixel> image = base.GetImage();
-                TPixel color = default(TPixel);
-                color.FromRgba32(new Rgba32(this.r, this.g, this.b, this.a));
+                Color color = new Rgba32(this.r, this.g, this.b, this.a);
 
                 image.Mutate(x => x.Fill(color));
                 return image;
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index c5aa1fb944..048c6347cd 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -484,6 +484,20 @@ namespace SixLabors.ImageSharp.Tests
             
             return image;
         }
+        
+        /// <summary>
+        /// All pixels in all frames should be exactly equal to 'expectedPixelColor.ToPixel()'.
+        /// </summary>
+        public static Image<TPixel> ComparePixelBufferTo<TPixel>(this Image<TPixel> image, Color expectedPixelColor)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            foreach (ImageFrame<TPixel> imageFrame in image.Frames)
+            {
+                imageFrame.ComparePixelBufferTo(expectedPixelColor.ToPixel<TPixel>());
+            }
+            
+            return image;
+        }
 
         /// <summary>
         /// All pixels in the frame should be exactly equal to 'expectedPixel'.

From a224e8899337c462c588c9584f0243daf81cb728 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 21:56:40 +0200
Subject: [PATCH 182/223] tests are passing

---
 .../Processing/Processors/Text/DrawTextProcessor.cs            | 2 +-
 tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
index 016cf56dea..d1e28afeb8 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
             where TPixel : struct, IPixel<TPixel>
         {
-            throw new NotImplementedException();
+            return new DrawTextProcessor<TPixel>(this);
         }
     }
     
diff --git a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
index 5d1442e79c..361e7e70d1 100644
--- a/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs
@@ -176,7 +176,8 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 // the result must be a black and white pattern, no other color should occur:
                 Assert.All(
                     Enumerable.Range(0, image.Width).Select(i => image[i, 0]),
-                    color => Assert.True(color.Equals(black) || color.Equals(white)));
+                    color => Assert.True(
+                        color.Equals(black.ToPixel<TPixel>()) || color.Equals(white.ToPixel<TPixel>())));
 
                 image.CompareToReferenceOutput(
                     TolerantComparer,

From 2025f9845c3de2a732497cfd3e70dd4878e89833 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 22:14:46 +0200
Subject: [PATCH 183/223] fix new 8bit bmp code

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs          | 9 ++++++---
 tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs | 2 +-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 90ea673d3e..edde7dc893 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -306,12 +306,15 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             where TPixel : struct, IPixel<TPixel>
         {
             using (IMemoryOwner<byte> colorPaletteBuffer = this.memoryAllocator.AllocateManagedByteBuffer(ColorPaletteSize8Bit, AllocationOptions.Clean))
-            using (QuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
+            using (IQuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
             {
                 Span<byte> colorPalette = colorPaletteBuffer.GetSpan();
                 int idx = 0;
                 var color = default(Rgba32);
-                foreach (TPixel quantizedColor in quantized.Palette)
+                ReadOnlySpan<TPixel> paletteSpan = quantized.Palette.Span;
+
+                // TODO: Use bulk conversion here for better perf
+                foreach (TPixel quantizedColor in paletteSpan)
                 {
                     quantizedColor.ToRgba32(ref color);
                     colorPalette[idx] = color.B;
@@ -327,7 +330,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
                 for (int y = image.Height - 1; y >= 0; y--)
                 {
-                    Span<byte> pixelSpan = quantized.GetRowSpan(y);
+                    ReadOnlySpan<byte> pixelSpan = quantized.GetRowSpan(y);
                     stream.Write(pixelSpan);
 
                     for (int i = 0; i < this.padding; i++)
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index abf57ed01a..dd76e9443c 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 {
     using static TestImages.Bmp;
 
-    public class BmpEncoderTests : FileTestBase
+    public class BmpEncoderTests
     {
         public static readonly TheoryData<BmpBitsPerPixel> BitsPerPixel =
         new TheoryData<BmpBitsPerPixel>

From f5f80ca796de826f9a9becd1e26f9a12e7aa6dd7 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 22:20:34 +0200
Subject: [PATCH 184/223] move drawing extensions to a (non-namespace-provider)
 subfolder

---
 .../ImageSharp.Drawing.csproj.DotSettings     |   2 +
 .../{ => Extensions}/DrawBezierExtensions.cs  |   0
 .../{ => Extensions}/DrawImageExtensions.cs   | 272 +++++++++---------
 .../{ => Extensions}/DrawLineExtensions.cs    |   0
 .../DrawPathCollectionExtensions.cs           |   0
 .../{ => Extensions}/DrawPathExtensions.cs    |   0
 .../{ => Extensions}/DrawPolygonExtensions.cs |   0
 .../DrawRectangleExtensions.cs                |   0
 .../{ => Extensions}/DrawTextExtensions.cs    |   0
 .../FillPathBuilderExtensions.cs              |   0
 .../FillPathCollectionExtensions.cs           |   0
 .../{ => Extensions}/FillPathExtensions.cs    |   0
 .../{ => Extensions}/FillPolygonExtensions.cs |   0
 .../FillRectangleExtensions.cs                |   0
 .../{ => Extensions}/FillRegionExtensions.cs  |   0
 15 files changed, 138 insertions(+), 136 deletions(-)
 create mode 100644 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj.DotSettings
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawBezierExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawImageExtensions.cs (98%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawLineExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawPathCollectionExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawPathExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawPolygonExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawRectangleExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/DrawTextExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillPathBuilderExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillPathCollectionExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillPathExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillPolygonExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillRectangleExtensions.cs (100%)
 rename src/ImageSharp.Drawing/Processing/{ => Extensions}/FillRegionExtensions.cs (100%)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj.DotSettings b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj.DotSettings
new file mode 100644
index 0000000000..a728b54979
--- /dev/null
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj.DotSettings
@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=processing_005Cextensions/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawBezierExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawBezierExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawBezierExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawImageExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
similarity index 98%
rename from src/ImageSharp.Drawing/Processing/DrawImageExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
index a8ee4d90bc..58459ebc5d 100644
--- a/src/ImageSharp.Drawing/Processing/DrawImageExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
@@ -1,137 +1,137 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors.Drawing;
-using SixLabors.Primitives;
-
-namespace SixLabors.ImageSharp.Processing
-{
-    /// <summary>
-    /// Adds extensions that allow the drawing of images to the <see cref="Image{TPixel}"/> type.
-    /// </summary>
-    public static class DrawImageExtensions
-    {
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="colorBlending">The blending mode.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="colorBlending">The color blending mode.</param>
-        /// <param name="alphaComposition">The alpha composition mode.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, alphaComposition, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="options">The options, including the blending type and blending amount.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, GraphicsOptions options)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="location">The location to draw the blended image.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="location">The location to draw the blended image.</param>
-        /// <param name="colorBlending">The color blending to apply.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="location">The location to draw the blended image.</param>
-        /// <param name="colorBlending">The color blending to apply.</param>
-        /// <param name="alphaComposition">The alpha composition mode.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, alphaComposition, opacity));
-
-        /// <summary>
-        /// Draws the given image together with the current one by blending their pixels.
-        /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
-        /// <param name="source">The image this method extends.</param>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="location">The location to draw the blended image.</param>
-        /// <param name="options">The options containing the blend mode and opacity.</param>
-        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, GraphicsOptions options)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
-    }
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing.Processors.Drawing;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing
+{
+    /// <summary>
+    /// Adds extensions that allow the drawing of images to the <see cref="Image{TPixel}"/> type.
+    /// </summary>
+    public static class DrawImageExtensions
+    {
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="colorBlending">The blending mode.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="colorBlending">The color blending mode.</param>
+        /// <param name="alphaComposition">The alpha composition mode.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, alphaComposition, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="options">The options, including the blending type and blending amount.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, GraphicsOptions options)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="colorBlending">The color blending to apply.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="colorBlending">The color blending to apply.</param>
+        /// <param name="alphaComposition">The alpha composition mode.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, alphaComposition, opacity));
+
+        /// <summary>
+        /// Draws the given image together with the current one by blending their pixels.
+        /// </summary>
+        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
+        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
+        /// <param name="source">The image this method extends.</param>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="options">The options containing the blend mode and opacity.</param>
+        /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
+        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, GraphicsOptions options)
+            where TPixelDst : struct, IPixel<TPixelDst>
+            where TPixelSrc : struct, IPixel<TPixelSrc>
+            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
+    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawLineExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawLineExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawLineExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawPathCollectionExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawPathCollectionExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawPathCollectionExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawPathExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawPolygonExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawPolygonExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawPolygonExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawRectangleExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawRectangleExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawRectangleExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawTextExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/DrawTextExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/DrawTextExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillPathBuilderExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillPathBuilderExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillPathBuilderExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillPathCollectionExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillPathCollectionExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillPathCollectionExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillPathExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillPathExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillPolygonExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillPolygonExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillPolygonExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillRectangleExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillRectangleExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillRectangleExtensions.cs
diff --git a/src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/FillRegionExtensions.cs
rename to src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs

From e57fe2058a27b12b003081b63820484f4bc54147 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 22:24:27 +0200
Subject: [PATCH 185/223] rename files

---
 .../Processing/{ColorStop{TPixel}.cs => ColorStop.cs}     | 0
 ...cGradientBrush{TPixel}.cs => EllipticGradientBrush.cs} | 0
 ...{GradientBrushBase{TPixel}.cs => GradientBrushBase.cs} | 0
 .../Processing/{ImageBrush{TPixel}.cs => ImageBrush.cs}   | 7 +++----
 ...earGradientBrush{TPixel}.cs => LinearGradientBrush.cs} | 1 -
 .../{PatternBrush{TPixel}.cs => PatternBrush.cs}          | 0
 .../Processing/{Pen{TPixel}.cs => Pen.cs}                 | 8 ++++----
 ...ialGradientBrush{TPixel}.cs => RadialGradientBrush.cs} | 0
 .../{RecolorBrush{TPixel}.cs => RecolorBrush.cs}          | 1 -
 .../Processing/{SolidBrush{TPixel}.cs => SolidBrush.cs}   | 0
 tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs     | 2 +-
 tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs        | 2 +-
 12 files changed, 9 insertions(+), 12 deletions(-)
 rename src/ImageSharp.Drawing/Processing/{ColorStop{TPixel}.cs => ColorStop.cs} (100%)
 rename src/ImageSharp.Drawing/Processing/{EllipticGradientBrush{TPixel}.cs => EllipticGradientBrush.cs} (100%)
 rename src/ImageSharp.Drawing/Processing/{GradientBrushBase{TPixel}.cs => GradientBrushBase.cs} (100%)
 rename src/ImageSharp.Drawing/Processing/{ImageBrush{TPixel}.cs => ImageBrush.cs} (97%)
 rename src/ImageSharp.Drawing/Processing/{LinearGradientBrush{TPixel}.cs => LinearGradientBrush.cs} (98%)
 rename src/ImageSharp.Drawing/Processing/{PatternBrush{TPixel}.cs => PatternBrush.cs} (100%)
 rename src/ImageSharp.Drawing/Processing/{Pen{TPixel}.cs => Pen.cs} (88%)
 rename src/ImageSharp.Drawing/Processing/{RadialGradientBrush{TPixel}.cs => RadialGradientBrush.cs} (100%)
 rename src/ImageSharp.Drawing/Processing/{RecolorBrush{TPixel}.cs => RecolorBrush.cs} (99%)
 rename src/ImageSharp.Drawing/Processing/{SolidBrush{TPixel}.cs => SolidBrush.cs} (100%)

diff --git a/src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs b/src/ImageSharp.Drawing/Processing/ColorStop.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/ColorStop{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/ColorStop.cs
diff --git a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/EllipticGradientBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs
diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/GradientBrushBase{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
diff --git a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
similarity index 97%
rename from src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/ImageBrush.cs
index d5ec1123d7..983c09adbf 100644
--- a/src/ImageSharp.Drawing/Processing/ImageBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
@@ -14,8 +14,7 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Provides an implementation of an image brush for painting images within areas.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public class ImageBrush<TPixel> : IBrush
+    public class ImageBrush : IBrush
     {
         /// <summary>
         /// The image to paint.
@@ -23,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
         private readonly Image image;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ImageBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="ImageBrush"/> class.
         /// </summary>
         /// <param name="image">The image.</param>
         public ImageBrush(Image image)
@@ -74,7 +73,7 @@ namespace SixLabors.ImageSharp.Processing
             private readonly int offsetX;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="ImageBrushApplicator"/> class.
+            /// Initializes a new instance of the <see cref="ImageBrushApplicator{TPixel}"/> class.
             /// </summary>
             /// <param name="target">The target image.</param>
             /// <param name="image">The image.</param>
diff --git a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
similarity index 98%
rename from src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
index 1a6f8d79ab..fac43ad634 100644
--- a/src/ImageSharp.Drawing/Processing/LinearGradientBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
@@ -13,7 +13,6 @@ namespace SixLabors.ImageSharp.Processing
     /// Supported right now:
     /// - a set of colors in relative distances to each other.
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format</typeparam>
     public sealed class LinearGradientBrush : GradientBrushBase
         
     {
diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/PatternBrush.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/PatternBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/PatternBrush.cs
diff --git a/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs b/src/ImageSharp.Drawing/Processing/Pen.cs
similarity index 88%
rename from src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/Pen.cs
index 922394946a..c9d60a50e2 100644
--- a/src/ImageSharp.Drawing/Processing/Pen{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/Pen.cs
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
         private readonly float[] pattern;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Pen{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Pen"/> class.
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Pen{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Pen"/> class.
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Pen{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Pen"/> class.
         /// </summary>
         /// <param name="color">The color.</param>
         /// <param name="width">The width.</param>
@@ -56,7 +56,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Pen{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="Pen"/> class.
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="width">The width.</param>
diff --git a/src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/RadialGradientBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
diff --git a/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/RecolorBrush.cs
similarity index 99%
rename from src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/RecolorBrush.cs
index ff098dce7c..fca95be327 100644
--- a/src/ImageSharp.Drawing/Processing/RecolorBrush{TPixel}.cs
+++ b/src/ImageSharp.Drawing/Processing/RecolorBrush.cs
@@ -15,7 +15,6 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Provides an implementation of a brush that can recolor an image
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     public class RecolorBrush : IBrush
     {
         /// <summary>
diff --git a/src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs b/src/ImageSharp.Drawing/Processing/SolidBrush.cs
similarity index 100%
rename from src/ImageSharp.Drawing/Processing/SolidBrush{TPixel}.cs
rename to src/ImageSharp.Drawing/Processing/SolidBrush.cs
diff --git a/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
index 772f62d5cc..e1fc7c30c1 100644
--- a/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
         {
             using (var src = new Image<Rgba32>(5, 5))
             {
-                var brush = new ImageBrush<Rgba32>(src);
+                var brush = new ImageBrush(src);
                 using (var dest = new Image<Rgba32>(10, 10))
                 {
                     dest.Mutate(c => c.Fill(brush, new Rectangle(0, 0, 10, 10)));
diff --git a/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
index f84d2b31c9..5393e9954f 100644
--- a/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillPolygonTests.cs
@@ -95,7 +95,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
 
             using (Image<TPixel> brushImage = Image.Load<TPixel>(TestFile.Create(brushImageName).Bytes))
             {
-                var brush = new ImageBrush<TPixel>(brushImage);
+                var brush = new ImageBrush(brushImage);
                 
                 provider.RunValidatingProcessorTest(
                     c => c.FillPolygon(brush, simplePath),

From 659f8b62314a76f9d513e865b75b2e30ae0748cb Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Sun, 12 May 2019 22:54:38 +0200
Subject: [PATCH 186/223] ImageBrush can apply a source image of a different
 pixel type than the target

---
 .../Processing/ImageBrush.cs                  | 44 ++++++++++++++-----
 src/ImageSharp/Image.cs                       | 17 +++++++
 src/ImageSharp/Image{TPixel}.cs               | 11 +----
 .../Drawing/DrawImageTests.cs                 |  2 +
 .../Drawing/FillImageBrushTests.cs            | 19 ++++++++
 .../TestUtilities/ImagingTestCaseUtility.cs   |  6 +--
 .../TestUtilities/TestImageExtensions.cs      | 29 +++++-------
 tests/Images/External                         |  2 +-
 8 files changed, 86 insertions(+), 44 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/ImageBrush.cs b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
index 983c09adbf..c2a8d3a261 100644
--- a/src/ImageSharp.Drawing/Processing/ImageBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Buffers;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
@@ -37,8 +38,14 @@ namespace SixLabors.ImageSharp.Processing
             GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel>
         {
-            Image<TPixel> specificImage = (Image<TPixel>)this.image;
-            return new ImageBrushApplicator<TPixel>(source, specificImage.Frames.RootFrame, region, options);
+            if (this.image is Image<TPixel> specificImage)
+            {
+                return new ImageBrushApplicator<TPixel>(source, specificImage, region, options, false);
+            }
+
+            specificImage = this.image.CloneAs<TPixel>();
+            
+            return new ImageBrushApplicator<TPixel>(source, specificImage, region, options, true);
         }
 
         /// <summary>
@@ -47,10 +54,11 @@ namespace SixLabors.ImageSharp.Processing
         private class ImageBrushApplicator<TPixel> : BrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
-            /// <summary>
-            /// The source image.
-            /// </summary>
-            private readonly ImageFrame<TPixel> source;
+            private ImageFrame<TPixel> sourceFrame;
+
+            private Image<TPixel> sourceImage;
+
+            private readonly bool shouldDisposeImage;
 
             /// <summary>
             /// The y-length.
@@ -79,10 +87,18 @@ namespace SixLabors.ImageSharp.Processing
             /// <param name="image">The image.</param>
             /// <param name="region">The region.</param>
             /// <param name="options">The options</param>
-            public ImageBrushApplicator(ImageFrame<TPixel> target, ImageFrame<TPixel> image, RectangleF region, GraphicsOptions options)
+            /// <param name="shouldDisposeImage">Whether to dispose the image on disposal of the applicator.</param>
+            public ImageBrushApplicator(
+                ImageFrame<TPixel> target,
+                Image<TPixel> image,
+                RectangleF region,
+                GraphicsOptions options,
+                bool shouldDisposeImage)
                 : base(target, options)
             {
-                this.source = image;
+                this.sourceImage = image;
+                this.sourceFrame = image.Frames.RootFrame;
+                this.shouldDisposeImage = shouldDisposeImage;
                 this.xLength = image.Width;
                 this.yLength = image.Height;
                 this.offsetY = (int)MathF.Max(MathF.Floor(region.Top), 0);
@@ -103,13 +119,19 @@ namespace SixLabors.ImageSharp.Processing
                 {
                     int srcX = (x - this.offsetX) % this.xLength;
                     int srcY = (y - this.offsetY) % this.yLength;
-                    return this.source[srcX, srcY];
+                    return this.sourceFrame[srcX, srcY];
                 }
             }
 
             /// <inheritdoc />
             public override void Dispose()
             {
+                if (this.shouldDisposeImage)
+                {
+                    this.sourceImage?.Dispose();
+                    this.sourceImage = null;
+                    this.sourceFrame = null;
+                }
             }
 
             /// <inheritdoc />
@@ -124,7 +146,7 @@ namespace SixLabors.ImageSharp.Processing
 
                     int sourceY = (y - this.offsetY) % this.yLength;
                     int offsetX = x - this.offsetX;
-                    Span<TPixel> sourceRow = this.source.GetPixelRowSpan(sourceY);
+                    Span<TPixel> sourceRow = this.sourceFrame.GetPixelRowSpan(sourceY);
 
                     for (int i = 0; i < scanline.Length; i++)
                     {
@@ -137,7 +159,7 @@ namespace SixLabors.ImageSharp.Processing
 
                     Span<TPixel> destinationRow = this.Target.GetPixelRowSpan(y).Slice(x, scanline.Length);
                     this.Blender.Blend(
-                        this.source.Configuration,
+                        this.sourceFrame.Configuration,
                         destinationRow,
                         destinationRow,
                         overlaySpan,
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index 1566fd0eed..db03281064 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -87,6 +87,23 @@ namespace SixLabors.ImageSharp
             EncodeVisitor visitor = new EncodeVisitor(encoder, stream);
             this.AcceptVisitor(visitor);
         }
+        
+        /// <summary>
+        /// Returns a copy of the image in the given pixel format.
+        /// </summary>
+        /// <typeparam name="TPixel2">The pixel format.</typeparam>
+        /// <returns>The <see cref="Image{TPixel2}"/></returns>
+        public Image<TPixel2> CloneAs<TPixel2>()
+            where TPixel2 : struct, IPixel<TPixel2> => this.CloneAs<TPixel2>(this.Configuration);
+
+        /// <summary>
+        /// Returns a copy of the image in the given pixel format.
+        /// </summary>
+        /// <typeparam name="TPixel2">The pixel format.</typeparam>
+        /// <param name="configuration">The configuration providing initialization code which allows extending the library.</param>
+        /// <returns>The <see cref="Image{TPixel2}"/>.</returns>
+        public abstract Image<TPixel2> CloneAs<TPixel2>(Configuration configuration)
+            where TPixel2 : struct, IPixel<TPixel2>;
 
         /// <summary>
         /// Accept a <see cref="IImageVisitor"/>.
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 27e2bc593c..2b93b710b0 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -153,22 +153,13 @@ namespace SixLabors.ImageSharp
             return new Image<TPixel>(configuration, this.Metadata.DeepClone(), clonedFrames);
         }
 
-        /// <summary>
-        /// Returns a copy of the image in the given pixel format.
-        /// </summary>
-        /// <typeparam name="TPixel2">The pixel format.</typeparam>
-        /// <returns>The <see cref="Image{TPixel2}"/></returns>
-        public Image<TPixel2> CloneAs<TPixel2>()
-            where TPixel2 : struct, IPixel<TPixel2> => this.CloneAs<TPixel2>(this.Configuration);
-
         /// <summary>
         /// Returns a copy of the image in the given pixel format.
         /// </summary>
         /// <typeparam name="TPixel2">The pixel format.</typeparam>
         /// <param name="configuration">The configuration providing initialization code which allows extending the library.</param>
         /// <returns>The <see cref="Image{TPixel2}"/>.</returns>
-        public Image<TPixel2> CloneAs<TPixel2>(Configuration configuration)
-            where TPixel2 : struct, IPixel<TPixel2>
+        public override Image<TPixel2> CloneAs<TPixel2>(Configuration configuration)
         {
             IEnumerable<ImageFrame<TPixel2>> clonedFrames = this.Frames.Select(x => x.CloneAs<TPixel2>(configuration));
             return new Image<TPixel2>(configuration, this.Metadata.DeepClone(), clonedFrames);
diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index 70879e6feb..e48a0b0ae3 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -175,5 +175,7 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 }
             }
         }
+
+        
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
index e1fc7c30c1..d33d7b70d2 100644
--- a/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/FillImageBrushTests.cs
@@ -32,5 +32,24 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 }
             }
         }
+        
+        [Theory]
+        [WithTestPatternImages(200, 200, PixelTypes.Rgba32 | PixelTypes.Bgra32)]
+        public void UseBrushOfDifferentPixelType<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            byte[] data = TestFile.Create(TestImages.Png.Ducky).Bytes;
+            using (Image<TPixel> background = provider.GetImage())
+            using (Image overlay = provider.PixelType == PixelTypes.Rgba32
+                                       ? (Image)Image.Load<Bgra32>(data)
+                                       : Image.Load<Rgba32>(data))
+            {
+                var brush = new ImageBrush(overlay);
+                background.Mutate(c => c.Fill(brush));
+
+                background.DebugSave(provider, appendSourceFileOrDescription : false);
+                background.CompareToReferenceOutput(provider, appendSourceFileOrDescription: false);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs b/tests/ImageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs
index c91ef56a1a..92cc9f6368 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs
@@ -152,21 +152,19 @@ namespace SixLabors.ImageSharp.Tests
         /// <summary>
         /// Encodes image by the format matching the required extension, than saves it to the recommended output file.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format of the image</typeparam>
         /// <param name="image">The image instance</param>
         /// <param name="extension">The requested extension</param>
         /// <param name="encoder">Optional encoder</param>
         /// <param name="appendPixelTypeToFileName">A value indicating whether to append the pixel type to the test output file name</param>
         /// <param name="appendSourceFileOrDescription">A boolean indicating whether to append <see cref="ITestImageProvider.SourceFileOrDescription"/> to the test output file name.</param>
         /// <param name="testOutputDetails">Additional information to append to the test output file name</param>
-        public string SaveTestOutputFile<TPixel>(
-            Image<TPixel> image,
+        public string SaveTestOutputFile(
+            Image image,
             string extension = null,
             IImageEncoder encoder = null,
             object testOutputDetails = null,
             bool appendPixelTypeToFileName = true,
             bool appendSourceFileOrDescription = true)
-            where TPixel : struct, IPixel<TPixel>
         {
             string path = this.GetTestOutputFileName(
                 extension,
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index 048c6347cd..e77b1974d3 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -55,17 +55,16 @@ namespace SixLabors.ImageSharp.Tests
                     });
         }
 
-        public static Image<TPixel> DebugSave<TPixel>(
-            this Image<TPixel> image,
+        public static void DebugSave(
+            this Image image,
             ITestImageProvider provider,
             FormattableString testOutputDetails,
             string extension = "png",
             bool appendPixelTypeToFileName = true,
             bool appendSourceFileOrDescription = true,
             IImageEncoder encoder = null)
-            where TPixel : struct, IPixel<TPixel>
         {
-            return image.DebugSave(
+            image.DebugSave(
                 provider,
                 (object)testOutputDetails,
                 extension,
@@ -77,7 +76,6 @@ namespace SixLabors.ImageSharp.Tests
         /// <summary>
         /// Saves the image only when not running in the CI server.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format</typeparam>
         /// <param name="image">The image</param>
         /// <param name="provider">The image provider</param>
         /// <param name="testOutputDetails">Details to be concatenated to the test output file, describing the parameters of the test.</param>
@@ -85,15 +83,14 @@ namespace SixLabors.ImageSharp.Tests
         /// <param name="appendPixelTypeToFileName">A boolean indicating whether to append the pixel type to the  output file name.</param>
         /// <param name="appendSourceFileOrDescription">A boolean indicating whether to append <see cref="ITestImageProvider.SourceFileOrDescription"/> to the test output file name.</param>
         /// <param name="encoder">Custom encoder to use.</param>
-        public static Image<TPixel> DebugSave<TPixel>(
-            this Image<TPixel> image,
+        public static Image DebugSave(
+            this Image image,
             ITestImageProvider provider,
             object testOutputDetails = null,
             string extension = "png",
             bool appendPixelTypeToFileName = true,
             bool appendSourceFileOrDescription = true,
             IImageEncoder encoder = null)
-            where TPixel : struct, IPixel<TPixel>
         {
             if (TestEnvironment.RunsOnCI)
             {
@@ -111,37 +108,34 @@ namespace SixLabors.ImageSharp.Tests
             return image;
         }
 
-        public static Image<TPixel> DebugSave<TPixel>(
-            this Image<TPixel> image,
+        public static void DebugSave(
+            this Image image,
             ITestImageProvider provider,
             IImageEncoder encoder,
             FormattableString testOutputDetails,
             bool appendPixelTypeToFileName = true)
-            where TPixel : struct, IPixel<TPixel>
         {
-            return image.DebugSave(provider, encoder, (object)testOutputDetails, appendPixelTypeToFileName);
+            image.DebugSave(provider, encoder, (object)testOutputDetails, appendPixelTypeToFileName);
         }
 
         /// <summary>
         /// Saves the image only when not running in the CI server.
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format</typeparam>
         /// <param name="image">The image</param>
         /// <param name="provider">The image provider</param>
         /// <param name="encoder">The image encoder</param>
         /// <param name="testOutputDetails">Details to be concatenated to the test output file, describing the parameters of the test.</param>
         /// <param name="appendPixelTypeToFileName">A boolean indicating whether to append the pixel type to the  output file name.</param>
-        public static Image<TPixel> DebugSave<TPixel>(
-            this Image<TPixel> image,
+        public static void DebugSave(
+            this Image image,
             ITestImageProvider provider,
             IImageEncoder encoder,
             object testOutputDetails = null,
             bool appendPixelTypeToFileName = true)
-            where TPixel : struct, IPixel<TPixel>
         {
             if (TestEnvironment.RunsOnCI)
             {
-                return image;
+                return;
             }
 
             // We are running locally then we want to save it out
@@ -150,7 +144,6 @@ namespace SixLabors.ImageSharp.Tests
                 encoder: encoder,
                 testOutputDetails: testOutputDetails,
                 appendPixelTypeToFileName: appendPixelTypeToFileName);
-            return image;
         }
 
         public static Image<TPixel> DebugSaveMultiFrame<TPixel>(
diff --git a/tests/Images/External b/tests/Images/External
index 55c250ab80..9d1d9dd537 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 55c250ab80f7f9fc26208b9b9d9590cbe8012446
+Subproject commit 9d1d9dd53755007ee812907f64304d1925c6a91a

From 0f823b9b4a6fe43b932f073900b106c899b9d587 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 13 May 2019 01:56:07 +0200
Subject: [PATCH 187/223] non-generic DrawImageProcessor

---
 .../Extensions/DrawImageExtensions.cs         | 134 +++++++++++-------
 .../Processors/Drawing/DrawImageProcessor.cs  | 117 ++++++++++++---
 2 files changed, 187 insertions(+), 64 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
index 58459ebc5d..981cf1bef4 100644
--- a/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/Extensions/DrawImageExtensions.cs
@@ -15,98 +15,126 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            float opacity) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    Point.Empty,
+                    GraphicsOptions.Default.ColorBlendingMode,
+                    GraphicsOptions.Default.AlphaCompositionMode,
+                    opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="colorBlending">The blending mode.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            PixelColorBlendingMode colorBlending,
+            float opacity) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    Point.Empty,
+                    colorBlending,
+                    GraphicsOptions.Default.AlphaCompositionMode,
+                    opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="colorBlending">The color blending mode.</param>
         /// <param name="alphaComposition">The alpha composition mode.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, colorBlending, alphaComposition, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            PixelColorBlendingMode colorBlending,
+            PixelAlphaCompositionMode alphaComposition,
+            float opacity) =>
+            source.ApplyProcessor(new DrawImageProcessor(image, Point.Empty, colorBlending, alphaComposition, opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="options">The options, including the blending type and blending amount.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, GraphicsOptions options)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, Point.Empty, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            GraphicsOptions options) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    Point.Empty,
+                    options.ColorBlendingMode,
+                    options.AlphaCompositionMode,
+                    options.BlendPercentage));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="location">The location to draw the blended image.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, GraphicsOptions.Default.ColorBlendingMode, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            Point location,
+            float opacity) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    location,
+                    GraphicsOptions.Default.ColorBlendingMode,
+                    GraphicsOptions.Default.AlphaCompositionMode,
+                    opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="location">The location to draw the blended image.</param>
         /// <param name="colorBlending">The color blending to apply.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, GraphicsOptions.Default.AlphaCompositionMode, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            Point location,
+            PixelColorBlendingMode colorBlending,
+            float opacity) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    location,
+                    colorBlending,
+                    GraphicsOptions.Default.AlphaCompositionMode,
+                    opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="location">The location to draw the blended image.</param>
@@ -114,24 +142,34 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="alphaComposition">The alpha composition mode.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlending, PixelAlphaCompositionMode alphaComposition, float opacity)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, colorBlending, alphaComposition, opacity));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            Point location,
+            PixelColorBlendingMode colorBlending,
+            PixelAlphaCompositionMode alphaComposition,
+            float opacity) =>
+            source.ApplyProcessor(new DrawImageProcessor(image, location, colorBlending, alphaComposition, opacity));
 
         /// <summary>
         /// Draws the given image together with the current one by blending their pixels.
         /// </summary>
-        /// <typeparam name="TPixelDst">The pixel format of the destination image.</typeparam>
-        /// <typeparam name="TPixelSrc">The pixel format of the source image.</typeparam>
         /// <param name="source">The image this method extends.</param>
         /// <param name="image">The image to blend with the currently processing image.</param>
         /// <param name="location">The location to draw the blended image.</param>
         /// <param name="options">The options containing the blend mode and opacity.</param>
         /// <returns>The <see cref="Image{TPixelDst}"/>.</returns>
-        public static IImageProcessingContext<TPixelDst> DrawImage<TPixelDst, TPixelSrc>(this IImageProcessingContext<TPixelDst> source, Image<TPixelSrc> image, Point location, GraphicsOptions options)
-            where TPixelDst : struct, IPixel<TPixelDst>
-            where TPixelSrc : struct, IPixel<TPixelSrc>
-            => source.ApplyProcessor(new DrawImageProcessor<TPixelDst, TPixelSrc>(image, location, options.ColorBlendingMode, options.AlphaCompositionMode, options.BlendPercentage));
+        public static IImageProcessingContext DrawImage(
+            this IImageProcessingContext source,
+            Image image,
+            Point location,
+            GraphicsOptions options) =>
+            source.ApplyProcessor(
+                new DrawImageProcessor(
+                    image,
+                    location,
+                    options.ColorBlendingMode,
+                    options.AlphaCompositionMode,
+                    options.BlendPercentage));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
index 6c03537eb3..0fbef9afea 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
@@ -13,14 +13,90 @@ using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
+    public class DrawImageProcessor : IImageProcessor
+    {
+        public DrawImageProcessor(
+            Image image,
+            Point location,
+            PixelColorBlendingMode colorBlendingMode,
+            PixelAlphaCompositionMode alphaCompositionMode,
+            float opacity)
+        {
+            this.Image = image;
+            this.Location = location;
+            this.ColorBlendingMode = colorBlendingMode;
+            this.AlphaCompositionMode = alphaCompositionMode;
+            this.Opacity = opacity;
+        }
+
+        /// <summary>
+        /// Gets the image to blend
+        /// </summary>
+        public Image Image { get; }
+
+        /// <summary>
+        /// Gets the location to draw the blended image
+        /// </summary>
+        public Point Location { get; }
+        
+        /// <summary>
+        /// Gets the blending mode to use when drawing the image.
+        /// </summary>
+        public PixelColorBlendingMode ColorBlendingMode { get; }
+        
+        /// <summary>
+        /// Gets the Alpha blending mode to use when drawing the image.
+        /// </summary>
+        public PixelAlphaCompositionMode AlphaCompositionMode { get; }
+        
+        /// <summary>
+        /// Gets the opacity of the image to blend
+        /// </summary>
+        public float Opacity { get; }
+
+        /// <inheritdoc />
+        public IImageProcessor<TPixelBg> CreatePixelSpecificProcessor<TPixelBg>()
+            where TPixelBg : struct, IPixel<TPixelBg>
+        {
+            var visitor = new ProcessorFactoryVisitor<TPixelBg>(this);
+            this.Image.AcceptVisitor(visitor);
+            return visitor.Result;
+        }
+
+        private class ProcessorFactoryVisitor<TPixelBg> : IImageVisitor
+            where TPixelBg : struct, IPixel<TPixelBg>
+        {
+            private readonly DrawImageProcessor definition;
+
+            public ProcessorFactoryVisitor(DrawImageProcessor definition)
+            {
+                this.definition = definition;
+            }
+
+            public IImageProcessor<TPixelBg> Result { get; private set; }
+            
+            public void Visit<TPixelFg>(Image<TPixelFg> image)
+                where TPixelFg : struct, IPixel<TPixelFg>
+            {
+                this.Result = new DrawImageProcessor<TPixelBg, TPixelFg>(
+                    image,
+                    this.definition.Location,
+                    this.definition.ColorBlendingMode,
+                    this.definition.AlphaCompositionMode,
+                    this.definition.Opacity
+                    );
+            }
+        }
+    }
+
     /// <summary>
     /// Combines two images together by blending the pixels.
     /// </summary>
-    /// <typeparam name="TPixelDst">The pixel format of destination image.</typeparam>
-    /// <typeparam name="TPixelSrc">The pixel format of source image.</typeparam>
-    internal class DrawImageProcessor<TPixelDst, TPixelSrc> : ImageProcessor<TPixelDst>
-        where TPixelDst : struct, IPixel<TPixelDst>
-        where TPixelSrc : struct, IPixel<TPixelSrc>
+    /// <typeparam name="TPixelBg">The pixel format of destination image.</typeparam>
+    /// <typeparam name="TPixelFg">The pixel format of source image.</typeparam>
+    internal class DrawImageProcessor<TPixelBg, TPixelFg> : ImageProcessor<TPixelBg>
+        where TPixelBg : struct, IPixel<TPixelBg>
+        where TPixelFg : struct, IPixel<TPixelFg>
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="DrawImageProcessor{TPixelDst, TPixelSrc}"/> class.
@@ -30,20 +106,25 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         /// <param name="colorBlendingMode">The blending mode to use when drawing the image.</param>
         /// <param name="alphaCompositionMode">The Alpha blending mode to use when drawing the image.</param>
         /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        public DrawImageProcessor(Image<TPixelSrc> image, Point location, PixelColorBlendingMode colorBlendingMode, PixelAlphaCompositionMode alphaCompositionMode, float opacity)
+        public DrawImageProcessor(
+            Image<TPixelFg> image,
+            Point location,
+            PixelColorBlendingMode colorBlendingMode,
+            PixelAlphaCompositionMode alphaCompositionMode,
+            float opacity)
         {
             Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
 
             this.Image = image;
             this.Opacity = opacity;
-            this.Blender = PixelOperations<TPixelDst>.Instance.GetPixelBlender(colorBlendingMode, alphaCompositionMode);
+            this.Blender = PixelOperations<TPixelBg>.Instance.GetPixelBlender(colorBlendingMode, alphaCompositionMode);
             this.Location = location;
         }
 
         /// <summary>
         /// Gets the image to blend
         /// </summary>
-        public Image<TPixelSrc> Image { get; }
+        public Image<TPixelFg> Image { get; }
 
         /// <summary>
         /// Gets the opacity of the image to blend
@@ -53,7 +134,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         /// <summary>
         /// Gets the pixel blender
         /// </summary>
-        public PixelBlender<TPixelDst> Blender { get; }
+        public PixelBlender<TPixelBg> Blender { get; }
 
         /// <summary>
         /// Gets the location to draw the blended image
@@ -61,10 +142,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         public Point Location { get; }
 
         /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixelDst> source, Rectangle sourceRectangle, Configuration configuration)
+        protected override void OnFrameApply(
+            ImageFrame<TPixelBg> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
         {
-            Image<TPixelSrc> targetImage = this.Image;
-            PixelBlender<TPixelDst> blender = this.Blender;
+            Image<TPixelFg> targetImage = this.Image;
+            PixelBlender<TPixelBg> blender = this.Blender;
             int locationY = this.Location.Y;
 
             // Align start/end positions.
@@ -84,7 +168,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             // not a valid operation because rectangle does not overlap with this image.
             if (workingRect.Width <= 0 || workingRect.Height <= 0)
             {
-                throw new ImageProcessingException("Cannot draw image because the source image does not overlap the target image.");
+                throw new ImageProcessingException(
+                    "Cannot draw image because the source image does not overlap the target image.");
             }
 
             ParallelHelper.IterateRows(
@@ -94,10 +179,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                     {
                         for (int y = rows.Min; y < rows.Max; y++)
                         {
-                            Span<TPixelDst> background = source.GetPixelRowSpan(y).Slice(minX, width);
-                            Span<TPixelSrc> foreground =
+                            Span<TPixelBg> background = source.GetPixelRowSpan(y).Slice(minX, width);
+                            Span<TPixelFg> foreground =
                                 targetImage.GetPixelRowSpan(y - locationY).Slice(targetX, width);
-                            blender.Blend<TPixelSrc>(configuration, background, background, foreground, this.Opacity);
+                            blender.Blend<TPixelFg>(configuration, background, background, foreground, this.Opacity);
                         }
                     });
         }

From 79439dbea1754a2b661ade7b786a1283812932d4 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 13 May 2019 02:13:16 +0200
Subject: [PATCH 188/223] DrawImageOfDifferentPixelType test cases

---
 .../Drawing/DrawImageTests.cs                 | 22 +++++++++++++++++--
 tests/Images/External                         |  2 +-
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index e48a0b0ae3..cb44651d6f 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -96,8 +96,26 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                     testInfo);
             }
         }
-        
-        
+
+        [Theory]
+        [WithTestPatternImages(200, 200, PixelTypes.Rgba32 | PixelTypes.Bgra32)]
+        public void DrawImageOfDifferentPixelType<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            byte[] brushData = TestFile.Create(TestImages.Png.Ducky).Bytes;
+
+            using (Image<TPixel> image = provider.GetImage())
+            using (Image brushImage = provider.PixelType == PixelTypes.Rgba32
+                                          ? (Image)Image.Load<Bgra32>(brushData)
+                                          : Image.Load<Rgba32>(brushData))
+            {
+                image.Mutate(c => c.DrawImage(brushImage, 0.5f));
+
+                image.DebugSave(provider, appendSourceFileOrDescription: false);
+                image.CompareToReferenceOutput(provider, appendSourceFileOrDescription: false);
+            }
+        }
+
         [Theory]
         [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 0, 0)]
         [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 25, 25)]
diff --git a/tests/Images/External b/tests/Images/External
index 9d1d9dd537..82f082ed3b 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 9d1d9dd53755007ee812907f64304d1925c6a91a
+Subproject commit 82f082ed3b47cc21b38dda9c5f8dda06dca5233a

From 17a4d91b825b60b91fdfa4655ecb33c4c5974422 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 13 May 2019 23:52:03 +0200
Subject: [PATCH 189/223] clean-up drawing processors

---
 .../ImageSharp.Drawing.csproj                 |   2 +-
 .../Processing/BrushApplicator.cs             |   2 +-
 .../Processing/PatternBrush.cs                |   2 +-
 .../Processors/Drawing/DrawImageProcessor.cs  | 131 +----
 .../DrawImageProcessor{TPixelBg,TPixelFg}.cs  | 111 +++++
 .../Processors/Drawing/FillProcessor.cs       | 128 +----
 .../Drawing/FillProcessor{TPixel}.cs          | 118 +++++
 .../Processors/Drawing/FillRegionProcessor.cs | 197 +-------
 .../Drawing/FillRegionProcessor{TPixel}.cs    | 195 ++++++++
 .../Processors/Text/DrawTextProcessor.cs      | 445 +----------------
 .../Text/DrawTextProcessor{TPixel}.cs         | 446 ++++++++++++++++++
 .../Processing/RadialGradientBrush.cs         |   1 -
 .../Processing/SolidBrush.cs                  |   4 +-
 .../Processing/TextGraphicsOptions.cs         | 328 +++++++------
 src/ImageSharp/Image.cs                       |   2 +-
 src/ImageSharp/ImageSharp.csproj              |   2 +-
 16 files changed, 1088 insertions(+), 1026 deletions(-)
 create mode 100644 src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor{TPixelBg,TPixelFg}.cs
 create mode 100644 src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor{TPixel}.cs
 create mode 100644 src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor{TPixel}.cs

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index fdeb27a770..722ef33ff0 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -40,9 +40,9 @@
 
   <ItemGroup>
     <AdditionalFiles Include="..\..\standards\stylecop.json" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
     <PackageReference Include="SixLabors.Fonts" Version="1.0.0-beta0008" />
     <PackageReference Include="SixLabors.Shapes" Version="1.0.0-beta0008" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-rc.114" PrivateAssets="All" />
   </ItemGroup>
 
   <PropertyGroup>
diff --git a/src/ImageSharp.Drawing/Processing/BrushApplicator.cs b/src/ImageSharp.Drawing/Processing/BrushApplicator.cs
index 0c6e0d3b40..7e75d7effc 100644
--- a/src/ImageSharp.Drawing/Processing/BrushApplicator.cs
+++ b/src/ImageSharp.Drawing/Processing/BrushApplicator.cs
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets the blend percentage
         /// </summary>
-        protected GraphicsOptions Options { get; private set; }
+        protected GraphicsOptions Options { get; }
 
         /// <summary>
         /// Gets the color for a single pixel.
diff --git a/src/ImageSharp.Drawing/Processing/PatternBrush.cs b/src/ImageSharp.Drawing/Processing/PatternBrush.cs
index 21690055e1..a7a6785b92 100644
--- a/src/ImageSharp.Drawing/Processing/PatternBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/PatternBrush.cs
@@ -81,7 +81,7 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="PatternBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="PatternBrush"/> class.
         /// </summary>
         /// <param name="brush">The brush.</param>
         internal PatternBrush(PatternBrush brush)
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
index 0fbef9afea..54b7315b21 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor.cs
@@ -1,20 +1,29 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.Buffers;
 using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
+
 using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
+    /// <summary>
+    /// Combines two images together by blending the pixels.
+    /// </summary>
     public class DrawImageProcessor : IImageProcessor
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DrawImageProcessor"/> class.
+        /// </summary>
+        /// <param name="image">The image to blend.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="colorBlendingMode">The blending mode to use when drawing the image.</param>
+        /// <param name="alphaCompositionMode">The Alpha blending mode to use when drawing the image.</param>
+        /// <param name="opacity">The opacity of the image to blend.</param>
         public DrawImageProcessor(
             Image image,
             Point location,
@@ -30,27 +39,27 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         }
 
         /// <summary>
-        /// Gets the image to blend
+        /// Gets the image to blend.
         /// </summary>
         public Image Image { get; }
 
         /// <summary>
-        /// Gets the location to draw the blended image
+        /// Gets the location to draw the blended image.
         /// </summary>
         public Point Location { get; }
-        
+
         /// <summary>
         /// Gets the blending mode to use when drawing the image.
         /// </summary>
         public PixelColorBlendingMode ColorBlendingMode { get; }
-        
+
         /// <summary>
         /// Gets the Alpha blending mode to use when drawing the image.
         /// </summary>
         public PixelAlphaCompositionMode AlphaCompositionMode { get; }
-        
+
         /// <summary>
-        /// Gets the opacity of the image to blend
+        /// Gets the opacity of the image to blend.
         /// </summary>
         public float Opacity { get; }
 
@@ -74,7 +83,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             }
 
             public IImageProcessor<TPixelBg> Result { get; private set; }
-            
+
             public void Visit<TPixelFg>(Image<TPixelFg> image)
                 where TPixelFg : struct, IPixel<TPixelFg>
             {
@@ -83,108 +92,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
                     this.definition.Location,
                     this.definition.ColorBlendingMode,
                     this.definition.AlphaCompositionMode,
-                    this.definition.Opacity
-                    );
+                    this.definition.Opacity);
             }
         }
     }
-
-    /// <summary>
-    /// Combines two images together by blending the pixels.
-    /// </summary>
-    /// <typeparam name="TPixelBg">The pixel format of destination image.</typeparam>
-    /// <typeparam name="TPixelFg">The pixel format of source image.</typeparam>
-    internal class DrawImageProcessor<TPixelBg, TPixelFg> : ImageProcessor<TPixelBg>
-        where TPixelBg : struct, IPixel<TPixelBg>
-        where TPixelFg : struct, IPixel<TPixelFg>
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DrawImageProcessor{TPixelDst, TPixelSrc}"/> class.
-        /// </summary>
-        /// <param name="image">The image to blend with the currently processing image.</param>
-        /// <param name="location">The location to draw the blended image.</param>
-        /// <param name="colorBlendingMode">The blending mode to use when drawing the image.</param>
-        /// <param name="alphaCompositionMode">The Alpha blending mode to use when drawing the image.</param>
-        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
-        public DrawImageProcessor(
-            Image<TPixelFg> image,
-            Point location,
-            PixelColorBlendingMode colorBlendingMode,
-            PixelAlphaCompositionMode alphaCompositionMode,
-            float opacity)
-        {
-            Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
-
-            this.Image = image;
-            this.Opacity = opacity;
-            this.Blender = PixelOperations<TPixelBg>.Instance.GetPixelBlender(colorBlendingMode, alphaCompositionMode);
-            this.Location = location;
-        }
-
-        /// <summary>
-        /// Gets the image to blend
-        /// </summary>
-        public Image<TPixelFg> Image { get; }
-
-        /// <summary>
-        /// Gets the opacity of the image to blend
-        /// </summary>
-        public float Opacity { get; }
-
-        /// <summary>
-        /// Gets the pixel blender
-        /// </summary>
-        public PixelBlender<TPixelBg> Blender { get; }
-
-        /// <summary>
-        /// Gets the location to draw the blended image
-        /// </summary>
-        public Point Location { get; }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(
-            ImageFrame<TPixelBg> source,
-            Rectangle sourceRectangle,
-            Configuration configuration)
-        {
-            Image<TPixelFg> targetImage = this.Image;
-            PixelBlender<TPixelBg> blender = this.Blender;
-            int locationY = this.Location.Y;
-
-            // Align start/end positions.
-            Rectangle bounds = targetImage.Bounds();
-
-            int minX = Math.Max(this.Location.X, sourceRectangle.X);
-            int maxX = Math.Min(this.Location.X + bounds.Width, sourceRectangle.Right);
-            int targetX = minX - this.Location.X;
-
-            int minY = Math.Max(this.Location.Y, sourceRectangle.Y);
-            int maxY = Math.Min(this.Location.Y + bounds.Height, sourceRectangle.Bottom);
-
-            int width = maxX - minX;
-
-            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
-            // not a valid operation because rectangle does not overlap with this image.
-            if (workingRect.Width <= 0 || workingRect.Height <= 0)
-            {
-                throw new ImageProcessingException(
-                    "Cannot draw image because the source image does not overlap the target image.");
-            }
-
-            ParallelHelper.IterateRows(
-                workingRect,
-                configuration,
-                rows =>
-                    {
-                        for (int y = rows.Min; y < rows.Max; y++)
-                        {
-                            Span<TPixelBg> background = source.GetPixelRowSpan(y).Slice(minX, width);
-                            Span<TPixelFg> foreground =
-                                targetImage.GetPixelRowSpan(y - locationY).Slice(targetX, width);
-                            blender.Blend<TPixelFg>(configuration, background, background, foreground, this.Opacity);
-                        }
-                    });
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor{TPixelBg,TPixelFg}.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor{TPixelBg,TPixelFg}.cs
new file mode 100644
index 0000000000..21599bf787
--- /dev/null
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/DrawImageProcessor{TPixelBg,TPixelFg}.cs
@@ -0,0 +1,111 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Drawing
+{
+    /// <summary>
+    /// Combines two images together by blending the pixels.
+    /// </summary>
+    /// <typeparam name="TPixelBg">The pixel format of destination image.</typeparam>
+    /// <typeparam name="TPixelFg">The pixel format of source image.</typeparam>
+    internal class DrawImageProcessor<TPixelBg, TPixelFg> : ImageProcessor<TPixelBg>
+        where TPixelBg : struct, IPixel<TPixelBg>
+        where TPixelFg : struct, IPixel<TPixelFg>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DrawImageProcessor{TPixelDst, TPixelSrc}"/> class.
+        /// </summary>
+        /// <param name="image">The image to blend with the currently processing image.</param>
+        /// <param name="location">The location to draw the blended image.</param>
+        /// <param name="colorBlendingMode">The blending mode to use when drawing the image.</param>
+        /// <param name="alphaCompositionMode">The Alpha blending mode to use when drawing the image.</param>
+        /// <param name="opacity">The opacity of the image to blend. Must be between 0 and 1.</param>
+        public DrawImageProcessor(
+            Image<TPixelFg> image,
+            Point location,
+            PixelColorBlendingMode colorBlendingMode,
+            PixelAlphaCompositionMode alphaCompositionMode,
+            float opacity)
+        {
+            Guard.MustBeBetweenOrEqualTo(opacity, 0, 1, nameof(opacity));
+
+            this.Image = image;
+            this.Opacity = opacity;
+            this.Blender = PixelOperations<TPixelBg>.Instance.GetPixelBlender(colorBlendingMode, alphaCompositionMode);
+            this.Location = location;
+        }
+
+        /// <summary>
+        /// Gets the image to blend
+        /// </summary>
+        public Image<TPixelFg> Image { get; }
+
+        /// <summary>
+        /// Gets the opacity of the image to blend
+        /// </summary>
+        public float Opacity { get; }
+
+        /// <summary>
+        /// Gets the pixel blender
+        /// </summary>
+        public PixelBlender<TPixelBg> Blender { get; }
+
+        /// <summary>
+        /// Gets the location to draw the blended image
+        /// </summary>
+        public Point Location { get; }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(
+            ImageFrame<TPixelBg> source,
+            Rectangle sourceRectangle,
+            Configuration configuration)
+        {
+            Image<TPixelFg> targetImage = this.Image;
+            PixelBlender<TPixelBg> blender = this.Blender;
+            int locationY = this.Location.Y;
+
+            // Align start/end positions.
+            Rectangle bounds = targetImage.Bounds();
+
+            int minX = Math.Max(this.Location.X, sourceRectangle.X);
+            int maxX = Math.Min(this.Location.X + bounds.Width, sourceRectangle.Right);
+            int targetX = minX - this.Location.X;
+
+            int minY = Math.Max(this.Location.Y, sourceRectangle.Y);
+            int maxY = Math.Min(this.Location.Y + bounds.Height, sourceRectangle.Bottom);
+
+            int width = maxX - minX;
+
+            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
+
+            // not a valid operation because rectangle does not overlap with this image.
+            if (workingRect.Width <= 0 || workingRect.Height <= 0)
+            {
+                throw new ImageProcessingException(
+                    "Cannot draw image because the source image does not overlap the target image.");
+            }
+
+            ParallelHelper.IterateRows(
+                workingRect,
+                configuration,
+                rows =>
+                    {
+                        for (int y = rows.Min; y < rows.Max; y++)
+                        {
+                            Span<TPixelBg> background = source.GetPixelRowSpan(y).Slice(minX, width);
+                            Span<TPixelFg> foreground =
+                                targetImage.GetPixelRowSpan(y - locationY).Slice(targetX, width);
+                            blender.Blend<TPixelFg>(configuration, background, background, foreground, this.Opacity);
+                        }
+                    });
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
index 8ea1c48cc2..d6254c7cfb 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor.cs
@@ -1,28 +1,38 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
 using System.Threading.Tasks;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.ParallelUtils;
+
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
+    /// <summary>
+    /// Defines a processor to fill an <see cref="Image"/> with the given <see cref="IBrush"/>
+    /// using blending defined by the given <see cref="GraphicsOptions"/>.
+    /// </summary>
     public class FillProcessor : IImageProcessor
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FillProcessor"/> class.
+        /// </summary>
+        /// <param name="brush">The brush to use for filling.</param>
+        /// <param name="options">The <see cref="GraphicsOptions"/> defining how to blend the brush pixels over the image pixels.</param>
         public FillProcessor(IBrush brush, GraphicsOptions options)
         {
             this.Brush = brush;
             this.Options = options;
         }
 
+        /// <summary>
+        /// Gets the <see cref="IBrush"/> used for filling the destination image.
+        /// </summary>
         public IBrush Brush { get; }
-        
+
+        /// <summary>
+        /// Gets the <see cref="GraphicsOptions"/> defining how to blend the brush pixels over the image pixels.
+        /// </summary>
         public GraphicsOptions Options { get; }
 
         /// <inheritdoc />
@@ -32,108 +42,4 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             return new FillProcessor<TPixel>(this);
         }
     }
-    
-    /// <summary>
-    /// Using the brush as a source of pixels colors blends the brush color with source.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class FillProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        private readonly FillProcessor definition;
-
-        public FillProcessor(FillProcessor definition)
-        {
-            this.definition = definition;
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            int startX = sourceRectangle.X;
-            int endX = sourceRectangle.Right;
-            int startY = sourceRectangle.Y;
-            int endY = sourceRectangle.Bottom;
-
-            // Align start/end positions.
-            int minX = Math.Max(0, startX);
-            int maxX = Math.Min(source.Width, endX);
-            int minY = Math.Max(0, startY);
-            int maxY = Math.Min(source.Height, endY);
-
-            int width = maxX - minX;
-
-            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
-
-            IBrush brush = this.definition.Brush;
-            GraphicsOptions options = this.definition.Options;
-
-            // If there's no reason for blending, then avoid it.
-            if (this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush))
-            {
-                ParallelExecutionSettings parallelSettings = configuration.GetParallelSettings().MultiplyMinimumPixelsPerTask(4);
-
-                TPixel colorPixel = solidBrush.Color.ToPixel<TPixel>();
-                
-                ParallelHelper.IterateRows(
-                    workingRect,
-                    parallelSettings,
-                    rows =>
-                        {
-                            for (int y = rows.Min; y < rows.Max; y++)
-                            {
-                                source.GetPixelRowSpan(y).Slice(minX, width).Fill(colorPixel);
-                            }
-                        });
-            }
-            else
-            {
-                // Reset offset if necessary.
-                if (minX > 0)
-                {
-                    startX = 0;
-                }
-
-                if (minY > 0)
-                {
-                    startY = 0;
-                }
-
-                using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
-                using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(
-                    source,
-                    sourceRectangle,
-                    options))
-                {
-                    amount.GetSpan().Fill(1f);
-
-                    ParallelHelper.IterateRows(
-                        workingRect,
-                        configuration,
-                        rows =>
-                            {
-                                for (int y = rows.Min; y < rows.Max; y++)
-                                {
-                                    int offsetY = y - startY;
-                                    int offsetX = minX - startX;
-
-                                    applicator.Apply(amount.GetSpan(), offsetX, offsetY);
-                                }
-                            });
-                }
-            }
-        }
-
-        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
-        {
-            solidBrush = this.definition.Brush as SolidBrush;
-
-            if (solidBrush == null)
-            {
-                return false;
-            }
-
-            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor{TPixel}.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor{TPixel}.cs
new file mode 100644
index 0000000000..68aef82e2d
--- /dev/null
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor{TPixel}.cs
@@ -0,0 +1,118 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Drawing
+{
+    /// <summary>
+    /// Using the brush as a source of pixels colors blends the brush color with source.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class FillProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly FillProcessor definition;
+
+        public FillProcessor(FillProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            int startX = sourceRectangle.X;
+            int endX = sourceRectangle.Right;
+            int startY = sourceRectangle.Y;
+            int endY = sourceRectangle.Bottom;
+
+            // Align start/end positions.
+            int minX = Math.Max(0, startX);
+            int maxX = Math.Min(source.Width, endX);
+            int minY = Math.Max(0, startY);
+            int maxY = Math.Min(source.Height, endY);
+
+            int width = maxX - minX;
+
+            var workingRect = Rectangle.FromLTRB(minX, minY, maxX, maxY);
+
+            IBrush brush = this.definition.Brush;
+            GraphicsOptions options = this.definition.Options;
+
+            // If there's no reason for blending, then avoid it.
+            if (this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush))
+            {
+                ParallelExecutionSettings parallelSettings = configuration.GetParallelSettings().MultiplyMinimumPixelsPerTask(4);
+
+                TPixel colorPixel = solidBrush.Color.ToPixel<TPixel>();
+
+                ParallelHelper.IterateRows(
+                    workingRect,
+                    parallelSettings,
+                    rows =>
+                        {
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                source.GetPixelRowSpan(y).Slice(minX, width).Fill(colorPixel);
+                            }
+                        });
+            }
+            else
+            {
+                // Reset offset if necessary.
+                if (minX > 0)
+                {
+                    startX = 0;
+                }
+
+                if (minY > 0)
+                {
+                    startY = 0;
+                }
+
+                using (IMemoryOwner<float> amount = source.MemoryAllocator.Allocate<float>(width))
+                using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(
+                    source,
+                    sourceRectangle,
+                    options))
+                {
+                    amount.GetSpan().Fill(1f);
+
+                    ParallelHelper.IterateRows(
+                        workingRect,
+                        configuration,
+                        rows =>
+                            {
+                                for (int y = rows.Min; y < rows.Max; y++)
+                                {
+                                    int offsetY = y - startY;
+                                    int offsetX = minX - startX;
+
+                                    applicator.Apply(amount.GetSpan(), offsetX, offsetY);
+                                }
+                            });
+                }
+            }
+        }
+
+        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
+        {
+            solidBrush = this.definition.Brush as SolidBrush;
+
+            if (solidBrush == null)
+            {
+                return false;
+            }
+
+            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
index 3653102efa..1b207d4cd4 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor.cs
@@ -1,18 +1,16 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
-using System.Buffers;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
-using SixLabors.ImageSharp.Utils;
 using SixLabors.Memory;
-using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Drawing
 {
+    /// <summary>
+    /// Defines a processor to fill <see cref="Image"/> pixels withing a given <see cref="Region"/>
+    /// with the given <see cref="IBrush"/> and blending defined by the given <see cref="GraphicsOptions"/>.
+    /// </summary>
     public class FillRegionProcessor : IImageProcessor
     {
         /// <summary>
@@ -29,7 +27,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         }
 
         /// <summary>
-        /// Gets the brush.
+        /// Gets the <see cref="IBrush"/> used for filling the destination image.
         /// </summary>
         public IBrush Brush { get; }
 
@@ -39,11 +37,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
         public Region Region { get; }
 
         /// <summary>
-        /// Gets the options.
+        /// Gets the <see cref="GraphicsOptions"/> defining how to blend the brush pixels over the image pixels.
         /// </summary>
-        /// <value>
-        /// The options.
-        /// </value>
         public GraphicsOptions Options { get; }
 
         /// <inheritdoc />
@@ -53,184 +48,4 @@ namespace SixLabors.ImageSharp.Processing.Processors.Drawing
             return new FillRegionProcessor<TPixel>(this);
         }
     }
-    
-    /// <summary>
-    /// Using a brush and a shape fills shape with contents of brush the
-    /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
-    /// <seealso cref="ImageProcessor{TPixel}" />
-    internal class FillRegionProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        private readonly FillRegionProcessor definition;
-
-        public FillRegionProcessor(FillRegionProcessor definition)
-        {
-            this.definition = definition;
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            GraphicsOptions options = this.definition.Options;
-            IBrush brush = this.definition.Brush;
-            Region region = this.definition.Region;
-            Rectangle rect = region.Bounds;
-
-            // Align start/end positions.
-            int minX = Math.Max(0, rect.Left);
-            int maxX = Math.Min(source.Width, rect.Right);
-            int minY = Math.Max(0, rect.Top);
-            int maxY = Math.Min(source.Height, rect.Bottom);
-            if (minX >= maxX)
-            {
-                return; // no effect inside image;
-            }
-
-            if (minY >= maxY)
-            {
-                return; // no effect inside image;
-            }
-
-            int maxIntersections = region.MaxIntersections;
-            float subpixelCount = 4;
-
-            // we need to offset the pixel grid to account for when we outline a path.
-            // basically if the line is [1,2] => [3,2] then when outlining at 1 we end up with a region of [0.5,1.5],[1.5, 1.5],[3.5,2.5],[2.5,2.5]
-            // and this can cause missed fills when not using antialiasing.so we offset the pixel grid by 0.5 in the x & y direction thus causing the#
-            // region to align with the pixel grid.
-            float offset = 0.5f;
-            if (options.Antialias)
-            {
-                offset = 0f; // we are antialiasing skip offsetting as real antialiasing should take care of offset.
-                subpixelCount = options.AntialiasSubpixelDepth;
-                if (subpixelCount < 4)
-                {
-                    subpixelCount = 4;
-                }
-            }
-
-            using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(source, rect, options))
-            {
-                int scanlineWidth = maxX - minX;
-                using (IMemoryOwner<float> bBuffer = source.MemoryAllocator.Allocate<float>(maxIntersections))
-                using (IMemoryOwner<float> bScanline = source.MemoryAllocator.Allocate<float>(scanlineWidth))
-                {
-                    bool scanlineDirty = true;
-                    float subpixelFraction = 1f / subpixelCount;
-                    float subpixelFractionPoint = subpixelFraction / subpixelCount;
-
-                    Span<float> buffer = bBuffer.GetSpan();
-                    Span<float> scanline = bScanline.GetSpan();
-
-                    bool isSolidBrushWithoutBlending = this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush);
-                    TPixel solidBrushColor = isSolidBrushWithoutBlending ? solidBrush.Color.ToPixel<TPixel>() : default;
-
-                    for (int y = minY; y < maxY; y++)
-                    {
-                        if (scanlineDirty)
-                        {
-                            scanline.Clear();
-                            scanlineDirty = false;
-                        }
-
-                        float yPlusOne = y + 1;
-                        for (float subPixel = (float)y; subPixel < yPlusOne; subPixel += subpixelFraction)
-                        {
-                            int pointsFound = region.Scan(subPixel + offset, buffer, configuration);
-                            if (pointsFound == 0)
-                            {
-                                // nothing on this line, skip
-                                continue;
-                            }
-
-                            QuickSort.Sort(buffer.Slice(0, pointsFound));
-
-                            for (int point = 0; point < pointsFound; point += 2)
-                            {
-                                // points will be paired up
-                                float scanStart = buffer[point] - minX;
-                                float scanEnd = buffer[point + 1] - minX;
-                                int startX = (int)MathF.Floor(scanStart + offset);
-                                int endX = (int)MathF.Floor(scanEnd + offset);
-
-                                if (startX >= 0 && startX < scanline.Length)
-                                {
-                                    for (float x = scanStart; x < startX + 1; x += subpixelFraction)
-                                    {
-                                        scanline[startX] += subpixelFractionPoint;
-                                        scanlineDirty = true;
-                                    }
-                                }
-
-                                if (endX >= 0 && endX < scanline.Length)
-                                {
-                                    for (float x = endX; x < scanEnd; x += subpixelFraction)
-                                    {
-                                        scanline[endX] += subpixelFractionPoint;
-                                        scanlineDirty = true;
-                                    }
-                                }
-
-                                int nextX = startX + 1;
-                                endX = Math.Min(endX, scanline.Length); // reduce to end to the right edge
-                                nextX = Math.Max(nextX, 0);
-                                for (int x = nextX; x < endX; x++)
-                                {
-                                    scanline[x] += subpixelFraction;
-                                    scanlineDirty = true;
-                                }
-                            }
-                        }
-
-                        if (scanlineDirty)
-                        {
-                            if (!options.Antialias)
-                            {
-                                bool hasOnes = false;
-                                bool hasZeros = false;
-                                for (int x = 0; x < scanlineWidth; x++)
-                                {
-                                    if (scanline[x] >= 0.5)
-                                    {
-                                        scanline[x] = 1;
-                                        hasOnes = true;
-                                    }
-                                    else
-                                    {
-                                        scanline[x] = 0;
-                                        hasZeros = true;
-                                    }
-                                }
-
-                                if (isSolidBrushWithoutBlending && hasOnes != hasZeros)
-                                {
-                                    if (hasOnes)
-                                    {
-                                        source.GetPixelRowSpan(y).Slice(minX, scanlineWidth).Fill(solidBrushColor);
-                                    }
-
-                                    continue;
-                                }
-                            }
-
-                            applicator.Apply(scanline, minX, y);
-                        }
-                    }
-                }
-            }
-        }
-
-        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
-        {
-            solidBrush = this.definition.Brush as SolidBrush;
-
-            if (solidBrush == null)
-            {
-                return false;
-            }
-
-            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor{TPixel}.cs b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor{TPixel}.cs
new file mode 100644
index 0000000000..d5778c865f
--- /dev/null
+++ b/src/ImageSharp.Drawing/Processing/Processors/Drawing/FillRegionProcessor{TPixel}.cs
@@ -0,0 +1,195 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Primitives;
+using SixLabors.ImageSharp.Utils;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Drawing
+{
+    /// <summary>
+    /// Using a brush and a shape fills shape with contents of brush the
+    /// </summary>
+    /// <typeparam name="TPixel">The type of the color.</typeparam>
+    /// <seealso cref="ImageProcessor{TPixel}" />
+    internal class FillRegionProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly FillRegionProcessor definition;
+
+        public FillRegionProcessor(FillRegionProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            GraphicsOptions options = this.definition.Options;
+            IBrush brush = this.definition.Brush;
+            Region region = this.definition.Region;
+            Rectangle rect = region.Bounds;
+
+            // Align start/end positions.
+            int minX = Math.Max(0, rect.Left);
+            int maxX = Math.Min(source.Width, rect.Right);
+            int minY = Math.Max(0, rect.Top);
+            int maxY = Math.Min(source.Height, rect.Bottom);
+            if (minX >= maxX)
+            {
+                return; // no effect inside image;
+            }
+
+            if (minY >= maxY)
+            {
+                return; // no effect inside image;
+            }
+
+            int maxIntersections = region.MaxIntersections;
+            float subpixelCount = 4;
+
+            // we need to offset the pixel grid to account for when we outline a path.
+            // basically if the line is [1,2] => [3,2] then when outlining at 1 we end up with a region of [0.5,1.5],[1.5, 1.5],[3.5,2.5],[2.5,2.5]
+            // and this can cause missed fills when not using antialiasing.so we offset the pixel grid by 0.5 in the x & y direction thus causing the#
+            // region to align with the pixel grid.
+            float offset = 0.5f;
+            if (options.Antialias)
+            {
+                offset = 0f; // we are antialiasing skip offsetting as real antialiasing should take care of offset.
+                subpixelCount = options.AntialiasSubpixelDepth;
+                if (subpixelCount < 4)
+                {
+                    subpixelCount = 4;
+                }
+            }
+
+            using (BrushApplicator<TPixel> applicator = brush.CreateApplicator(source, rect, options))
+            {
+                int scanlineWidth = maxX - minX;
+                using (IMemoryOwner<float> bBuffer = source.MemoryAllocator.Allocate<float>(maxIntersections))
+                using (IMemoryOwner<float> bScanline = source.MemoryAllocator.Allocate<float>(scanlineWidth))
+                {
+                    bool scanlineDirty = true;
+                    float subpixelFraction = 1f / subpixelCount;
+                    float subpixelFractionPoint = subpixelFraction / subpixelCount;
+
+                    Span<float> buffer = bBuffer.GetSpan();
+                    Span<float> scanline = bScanline.GetSpan();
+
+                    bool isSolidBrushWithoutBlending = this.IsSolidBrushWithoutBlending(out SolidBrush solidBrush);
+                    TPixel solidBrushColor = isSolidBrushWithoutBlending ? solidBrush.Color.ToPixel<TPixel>() : default;
+
+                    for (int y = minY; y < maxY; y++)
+                    {
+                        if (scanlineDirty)
+                        {
+                            scanline.Clear();
+                            scanlineDirty = false;
+                        }
+
+                        float yPlusOne = y + 1;
+                        for (float subPixel = (float)y; subPixel < yPlusOne; subPixel += subpixelFraction)
+                        {
+                            int pointsFound = region.Scan(subPixel + offset, buffer, configuration);
+                            if (pointsFound == 0)
+                            {
+                                // nothing on this line, skip
+                                continue;
+                            }
+
+                            QuickSort.Sort(buffer.Slice(0, pointsFound));
+
+                            for (int point = 0; point < pointsFound; point += 2)
+                            {
+                                // points will be paired up
+                                float scanStart = buffer[point] - minX;
+                                float scanEnd = buffer[point + 1] - minX;
+                                int startX = (int)MathF.Floor(scanStart + offset);
+                                int endX = (int)MathF.Floor(scanEnd + offset);
+
+                                if (startX >= 0 && startX < scanline.Length)
+                                {
+                                    for (float x = scanStart; x < startX + 1; x += subpixelFraction)
+                                    {
+                                        scanline[startX] += subpixelFractionPoint;
+                                        scanlineDirty = true;
+                                    }
+                                }
+
+                                if (endX >= 0 && endX < scanline.Length)
+                                {
+                                    for (float x = endX; x < scanEnd; x += subpixelFraction)
+                                    {
+                                        scanline[endX] += subpixelFractionPoint;
+                                        scanlineDirty = true;
+                                    }
+                                }
+
+                                int nextX = startX + 1;
+                                endX = Math.Min(endX, scanline.Length); // reduce to end to the right edge
+                                nextX = Math.Max(nextX, 0);
+                                for (int x = nextX; x < endX; x++)
+                                {
+                                    scanline[x] += subpixelFraction;
+                                    scanlineDirty = true;
+                                }
+                            }
+                        }
+
+                        if (scanlineDirty)
+                        {
+                            if (!options.Antialias)
+                            {
+                                bool hasOnes = false;
+                                bool hasZeros = false;
+                                for (int x = 0; x < scanlineWidth; x++)
+                                {
+                                    if (scanline[x] >= 0.5)
+                                    {
+                                        scanline[x] = 1;
+                                        hasOnes = true;
+                                    }
+                                    else
+                                    {
+                                        scanline[x] = 0;
+                                        hasZeros = true;
+                                    }
+                                }
+
+                                if (isSolidBrushWithoutBlending && hasOnes != hasZeros)
+                                {
+                                    if (hasOnes)
+                                    {
+                                        source.GetPixelRowSpan(y).Slice(minX, scanlineWidth).Fill(solidBrushColor);
+                                    }
+
+                                    continue;
+                                }
+                            }
+
+                            applicator.Apply(scanline, minX, y);
+                        }
+                    }
+                }
+            }
+        }
+
+        private bool IsSolidBrushWithoutBlending(out SolidBrush solidBrush)
+        {
+            solidBrush = this.definition.Brush as SolidBrush;
+
+            if (solidBrush == null)
+            {
+                return false;
+            }
+
+            return this.definition.Options.IsOpaqueColorWithoutBlending(solidBrush.Color);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
index d1e28afeb8..40621ce997 100644
--- a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
+++ b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor.cs
@@ -2,19 +2,16 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Buffers;
-using System.Collections.Generic;
+
 using SixLabors.Fonts;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Utils;
-using SixLabors.Memory;
 using SixLabors.Primitives;
-using SixLabors.Shapes;
 
 namespace SixLabors.ImageSharp.Processing.Processors.Text
 {
+    /// <summary>
+    /// Defines a processor to draw text on an <see cref="Image"/>.
+    /// </summary>
     public class DrawTextProcessor : IImageProcessor
     {
         /// <summary>
@@ -45,17 +42,17 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
         }
 
         /// <summary>
-        /// Gets the brush.
+        /// Gets the brush used to fill the glyphs.
         /// </summary>
         public IBrush Brush { get; }
 
         /// <summary>
-        /// Gets the options
+        /// Gets the <see cref="TextGraphicsOptions"/> defining blending modes and text-specific drawing settings.
         /// </summary>
         public TextGraphicsOptions Options { get; }
 
         /// <summary>
-        /// Gets  the text
+        /// Gets the text to draw.
         /// </summary>
         public string Text { get; }
 
@@ -81,432 +78,4 @@ namespace SixLabors.ImageSharp.Processing.Processors.Text
             return new DrawTextProcessor<TPixel>(this);
         }
     }
-    
-    /// <summary>
-    /// Using the brush as a source of pixels colors blends the brush color with source.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class DrawTextProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        private CachingGlyphRenderer textRenderer;
-
-        private readonly DrawTextProcessor definition;
-
-        public DrawTextProcessor(DrawTextProcessor definition)
-        {
-            this.definition = definition;
-        }
-
-        private TextGraphicsOptions Options => this.definition.Options;
-
-        private Font Font => this.definition.Font;
-
-        private PointF Location => this.definition.Location;
-
-        private string Text => this.definition.Text;
-
-        private IPen Pen => this.definition.Pen;
-
-        private IBrush Brush => this.definition.Brush;
-
-        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
-        {
-            base.BeforeImageApply(source, sourceRectangle);
-
-            // do everything at the image level as we are delegating the processing down to other processors
-            var style = new RendererOptions(this.Font, this.Options.DpiX, this.Options.DpiY, this.Location)
-            {
-                ApplyKerning = this.Options.ApplyKerning,
-                TabWidth = this.Options.TabWidth,
-                WrappingWidth = this.Options.WrapTextWidth,
-                HorizontalAlignment = this.Options.HorizontalAlignment,
-                VerticalAlignment = this.Options.VerticalAlignment
-            };
-
-            this.textRenderer = new CachingGlyphRenderer(source.GetMemoryAllocator(), this.Text.Length, this.Pen, this.Brush != null);
-            this.textRenderer.Options = (GraphicsOptions)this.Options;
-            var renderer = new TextRenderer(this.textRenderer);
-            renderer.RenderText(this.Text, style);
-        }
-
-        protected override void AfterImageApply(Image<TPixel> source, Rectangle sourceRectangle)
-        {
-            base.AfterImageApply(source, sourceRectangle);
-            this.textRenderer?.Dispose();
-            this.textRenderer = null;
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // this is a no-op as we have processes all as an image, we should be able to pass out of before email apply a skip frames outcome
-            Draw(this.textRenderer.FillOperations, this.Brush);
-            Draw(this.textRenderer.OutlineOperations, this.Pen?.StrokeFill);
-
-            void Draw(List<DrawingOperation> operations, IBrush brush)
-            {
-                if (operations?.Count > 0)
-                {
-                    using (BrushApplicator<TPixel> app = brush.CreateApplicator(source, sourceRectangle, this.textRenderer.Options))
-                    {
-                        foreach (DrawingOperation operation in operations)
-                        {
-                            Buffer2D<float> buffer = operation.Map;
-                            int startY = operation.Location.Y;
-                            int startX = operation.Location.X;
-                            int offSetSpan = 0;
-                            if (startX < 0)
-                            {
-                                offSetSpan = -startX;
-                                startX = 0;
-                            }
-
-                            int fistRow = 0;
-                            if (startY < 0)
-                            {
-                                fistRow = -startY;
-                            }
-
-                            int maxHeight = source.Height - startY;
-                            int end = Math.Min(operation.Map.Height, maxHeight);
-
-                            for (int row = fistRow; row < end; row++)
-                            {
-                                int y = startY + row;
-                                Span<float> span = buffer.GetRowSpan(row).Slice(offSetSpan);
-                                app.Apply(span, startX, y);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        private struct DrawingOperation
-        {
-            public Buffer2D<float> Map { get; set; }
-
-            public Point Location { get; set; }
-        }
-
-        private class CachingGlyphRenderer : IGlyphRenderer, IDisposable
-        {
-            // just enough accuracy to allow for 1/8 pixel differences which
-            // later are accumulated while rendering, but do not grow into full pixel offsets
-            // The value 8 is benchmarked to:
-            // - Provide a good accuracy (smaller than 0.2% image difference compared to the non-caching variant)
-            // - Cache hit ratio above 60%
-            private const float AccuracyMultiple = 8;
-
-            private readonly PathBuilder builder;
-
-            private Point currentRenderPosition = default;
-            private (GlyphRendererParameters glyph, PointF subPixelOffset) currentGlyphRenderParams = default;
-            private readonly int offset = 0;
-            private PointF currentPoint = default(PointF);
-
-            private readonly Dictionary<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData>
-                glyphData = new Dictionary<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData>();
-
-            private readonly bool renderOutline = false;
-            private readonly bool renderFill = false;
-            private bool rasterizationRequired = false;
-
-            public CachingGlyphRenderer(MemoryAllocator memoryAllocator, int size, IPen pen, bool renderFill)
-            {
-                this.MemoryAllocator = memoryAllocator;
-                this.Pen = pen;
-                this.renderFill = renderFill;
-                this.renderOutline = pen != null;
-                this.offset = 2;
-                if (this.renderFill)
-                {
-                    this.FillOperations = new List<DrawingOperation>(size);
-                }
-
-                if (this.renderOutline)
-                {
-                    this.offset = (int)MathF.Ceiling((pen.StrokeWidth * 2) + 2);
-                    this.OutlineOperations = new List<DrawingOperation>(size);
-                }
-
-                this.builder = new PathBuilder();
-            }
-
-            public List<DrawingOperation> FillOperations { get; }
-
-            public List<DrawingOperation> OutlineOperations { get; }
-
-            public MemoryAllocator MemoryAllocator { get; internal set; }
-
-            public IPen Pen { get; internal set; }
-
-            public GraphicsOptions Options { get; internal set; }
-
-            public void BeginFigure()
-            {
-                this.builder.StartFigure();
-            }
-
-            public bool BeginGlyph(RectangleF bounds, GlyphRendererParameters parameters)
-            {
-                this.currentRenderPosition = Point.Truncate(bounds.Location);
-                PointF subPixelOffset = bounds.Location - this.currentRenderPosition;
-
-                subPixelOffset.X = MathF.Round(subPixelOffset.X * AccuracyMultiple) / AccuracyMultiple;
-                subPixelOffset.Y = MathF.Round(subPixelOffset.Y * AccuracyMultiple) / AccuracyMultiple;
-
-                // we have offset our rendering origion a little bit down to prevent edge cropping, move the draw origin up to compensate
-                this.currentRenderPosition = new Point(this.currentRenderPosition.X - this.offset, this.currentRenderPosition.Y - this.offset);
-                this.currentGlyphRenderParams = (parameters, subPixelOffset);
-
-                if (this.glyphData.ContainsKey(this.currentGlyphRenderParams))
-                {
-                    // we have already drawn the glyph vectors skip trying again
-                    this.rasterizationRequired = false;
-                    return false;
-                }
-
-                // we check to see if we have a render cache and if we do then we render else
-                this.builder.Clear();
-
-                // ensure all glyphs render around [zero, zero]  so offset negative root positions so when we draw the glyph we can offet it back
-                this.builder.SetOrigin(new PointF(-(int)bounds.X + this.offset, -(int)bounds.Y + this.offset));
-
-                this.rasterizationRequired = true;
-                return true;
-            }
-
-            public void BeginText(RectangleF bounds)
-            {
-                // not concerned about this one
-                this.OutlineOperations?.Clear();
-                this.FillOperations?.Clear();
-            }
-
-            public void CubicBezierTo(PointF secondControlPoint, PointF thirdControlPoint, PointF point)
-            {
-                this.builder.AddBezier(this.currentPoint, secondControlPoint, thirdControlPoint, point);
-                this.currentPoint = point;
-            }
-
-            public void Dispose()
-            {
-                foreach (KeyValuePair<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData> kv in this.glyphData)
-                {
-                    kv.Value.Dispose();
-                }
-
-                this.glyphData.Clear();
-            }
-
-            public void EndFigure()
-            {
-                this.builder.CloseFigure();
-            }
-
-            public void EndGlyph()
-            {
-                GlyphRenderData renderData = default;
-
-                // has the glyoh been rendedered already????
-                if (this.rasterizationRequired)
-                {
-                    IPath path = this.builder.Build();
-
-                    if (this.renderFill)
-                    {
-                        renderData.FillMap = this.Render(path);
-                    }
-
-                    if (this.renderOutline)
-                    {
-                        if (this.Pen.StrokePattern.Length == 0)
-                        {
-                            path = path.GenerateOutline(this.Pen.StrokeWidth);
-                        }
-                        else
-                        {
-                            path = path.GenerateOutline(this.Pen.StrokeWidth, this.Pen.StrokePattern);
-                        }
-
-                        renderData.OutlineMap = this.Render(path);
-                    }
-
-                    this.glyphData[this.currentGlyphRenderParams] = renderData;
-                }
-                else
-                {
-                    renderData = this.glyphData[this.currentGlyphRenderParams];
-                }
-
-                if (this.renderFill)
-                {
-                    this.FillOperations.Add(new DrawingOperation
-                    {
-                        Location = this.currentRenderPosition,
-                        Map = renderData.FillMap
-                    });
-                }
-
-                if (this.renderOutline)
-                {
-                    this.OutlineOperations.Add(new DrawingOperation
-                    {
-                        Location = this.currentRenderPosition,
-                        Map = renderData.OutlineMap
-                    });
-                }
-            }
-
-            private Buffer2D<float> Render(IPath path)
-            {
-                Size size = Rectangle.Ceiling(path.Bounds).Size;
-                size = new Size(size.Width + (this.offset * 2), size.Height + (this.offset * 2));
-
-                float subpixelCount = 4;
-                float offset = 0.5f;
-                if (this.Options.Antialias)
-                {
-                    offset = 0f; // we are antialising skip offsetting as real antalising should take care of offset.
-                    subpixelCount = this.Options.AntialiasSubpixelDepth;
-                    if (subpixelCount < 4)
-                    {
-                        subpixelCount = 4;
-                    }
-                }
-
-                // take the path inside the path builder, scan thing and generate a Buffer2d representing the glyph and cache it.
-                Buffer2D<float> fullBuffer = this.MemoryAllocator.Allocate2D<float>(size.Width + 1, size.Height + 1, AllocationOptions.Clean);
-
-                using (IMemoryOwner<float> bufferBacking = this.MemoryAllocator.Allocate<float>(path.MaxIntersections))
-                using (IMemoryOwner<PointF> rowIntersectionBuffer = this.MemoryAllocator.Allocate<PointF>(size.Width))
-                {
-                    float subpixelFraction = 1f / subpixelCount;
-                    float subpixelFractionPoint = subpixelFraction / subpixelCount;
-
-                    for (int y = 0; y <= size.Height; y++)
-                    {
-                        Span<float> scanline = fullBuffer.GetRowSpan(y);
-                        bool scanlineDirty = false;
-                        float yPlusOne = y + 1;
-
-                        for (float subPixel = (float)y; subPixel < yPlusOne; subPixel += subpixelFraction)
-                        {
-                            var start = new PointF(path.Bounds.Left - 1, subPixel);
-                            var end = new PointF(path.Bounds.Right + 1, subPixel);
-                            Span<PointF> intersectionSpan = rowIntersectionBuffer.GetSpan();
-                            Span<float> buffer = bufferBacking.GetSpan();
-                            int pointsFound = path.FindIntersections(start, end, intersectionSpan);
-
-                            if (pointsFound == 0)
-                            {
-                                // nothing on this line skip
-                                continue;
-                            }
-
-                            for (int i = 0; i < pointsFound && i < intersectionSpan.Length; i++)
-                            {
-                                buffer[i] = intersectionSpan[i].X;
-                            }
-
-                            QuickSort.Sort(buffer.Slice(0, pointsFound));
-
-                            for (int point = 0; point < pointsFound; point += 2)
-                            {
-                                // points will be paired up
-                                float scanStart = buffer[point];
-                                float scanEnd = buffer[point + 1];
-                                int startX = (int)MathF.Floor(scanStart + offset);
-                                int endX = (int)MathF.Floor(scanEnd + offset);
-
-                                if (startX >= 0 && startX < scanline.Length)
-                                {
-                                    for (float x = scanStart; x < startX + 1; x += subpixelFraction)
-                                    {
-                                        scanline[startX] += subpixelFractionPoint;
-                                        scanlineDirty = true;
-                                    }
-                                }
-
-                                if (endX >= 0 && endX < scanline.Length)
-                                {
-                                    for (float x = endX; x < scanEnd; x += subpixelFraction)
-                                    {
-                                        scanline[endX] += subpixelFractionPoint;
-                                        scanlineDirty = true;
-                                    }
-                                }
-
-                                int nextX = startX + 1;
-                                endX = Math.Min(endX, scanline.Length); // reduce to end to the right edge
-                                nextX = Math.Max(nextX, 0);
-                                for (int x = nextX; x < endX; x++)
-                                {
-                                    scanline[x] += subpixelFraction;
-                                    scanlineDirty = true;
-                                }
-                            }
-                        }
-
-                        if (scanlineDirty)
-                        {
-                            if (!this.Options.Antialias)
-                            {
-                                for (int x = 0; x < size.Width; x++)
-                                {
-                                    if (scanline[x] >= 0.5)
-                                    {
-                                        scanline[x] = 1;
-                                    }
-                                    else
-                                    {
-                                        scanline[x] = 0;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-
-                return fullBuffer;
-            }
-
-            public void EndText()
-            {
-            }
-
-            public void LineTo(PointF point)
-            {
-                this.builder.AddLine(this.currentPoint, point);
-                this.currentPoint = point;
-            }
-
-            public void MoveTo(PointF point)
-            {
-                this.builder.StartFigure();
-                this.currentPoint = point;
-            }
-
-            public void QuadraticBezierTo(PointF secondControlPoint, PointF point)
-            {
-                this.builder.AddBezier(this.currentPoint, secondControlPoint, point);
-                this.currentPoint = point;
-            }
-
-            private struct GlyphRenderData : IDisposable
-            {
-                public Buffer2D<float> FillMap;
-
-                public Buffer2D<float> OutlineMap;
-
-                public void Dispose()
-                {
-                    this.FillMap?.Dispose();
-                    this.OutlineMap?.Dispose();
-                }
-            }
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor{TPixel}.cs b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor{TPixel}.cs
new file mode 100644
index 0000000000..9fb52d6bc3
--- /dev/null
+++ b/src/ImageSharp.Drawing/Processing/Processors/Text/DrawTextProcessor{TPixel}.cs
@@ -0,0 +1,446 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+
+using SixLabors.Fonts;
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Utils;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+using SixLabors.Shapes;
+
+namespace SixLabors.ImageSharp.Processing.Processors.Text
+{
+    /// <summary>
+    /// Using the brush as a source of pixels colors blends the brush color with source.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class DrawTextProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private CachingGlyphRenderer textRenderer;
+
+        private readonly DrawTextProcessor definition;
+
+        public DrawTextProcessor(DrawTextProcessor definition)
+        {
+            this.definition = definition;
+        }
+
+        private TextGraphicsOptions Options => this.definition.Options;
+
+        private Font Font => this.definition.Font;
+
+        private PointF Location => this.definition.Location;
+
+        private string Text => this.definition.Text;
+
+        private IPen Pen => this.definition.Pen;
+
+        private IBrush Brush => this.definition.Brush;
+
+        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            base.BeforeImageApply(source, sourceRectangle);
+
+            // do everything at the image level as we are delegating the processing down to other processors
+            var style = new RendererOptions(this.Font, this.Options.DpiX, this.Options.DpiY, this.Location)
+                            {
+                                ApplyKerning = this.Options.ApplyKerning,
+                                TabWidth = this.Options.TabWidth,
+                                WrappingWidth = this.Options.WrapTextWidth,
+                                HorizontalAlignment = this.Options.HorizontalAlignment,
+                                VerticalAlignment = this.Options.VerticalAlignment
+                            };
+
+            this.textRenderer = new CachingGlyphRenderer(source.GetMemoryAllocator(), this.Text.Length, this.Pen, this.Brush != null);
+            this.textRenderer.Options = (GraphicsOptions)this.Options;
+            var renderer = new TextRenderer(this.textRenderer);
+            renderer.RenderText(this.Text, style);
+        }
+
+        protected override void AfterImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            base.AfterImageApply(source, sourceRectangle);
+            this.textRenderer?.Dispose();
+            this.textRenderer = null;
+        }
+
+        /// <inheritdoc/>
+        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+        {
+            // this is a no-op as we have processes all as an image, we should be able to pass out of before email apply a skip frames outcome
+            Draw(this.textRenderer.FillOperations, this.Brush);
+            Draw(this.textRenderer.OutlineOperations, this.Pen?.StrokeFill);
+
+            void Draw(List<DrawingOperation> operations, IBrush brush)
+            {
+                if (operations?.Count > 0)
+                {
+                    using (BrushApplicator<TPixel> app = brush.CreateApplicator(source, sourceRectangle, this.textRenderer.Options))
+                    {
+                        foreach (DrawingOperation operation in operations)
+                        {
+                            Buffer2D<float> buffer = operation.Map;
+                            int startY = operation.Location.Y;
+                            int startX = operation.Location.X;
+                            int offSetSpan = 0;
+                            if (startX < 0)
+                            {
+                                offSetSpan = -startX;
+                                startX = 0;
+                            }
+
+                            int fistRow = 0;
+                            if (startY < 0)
+                            {
+                                fistRow = -startY;
+                            }
+
+                            int maxHeight = source.Height - startY;
+                            int end = Math.Min(operation.Map.Height, maxHeight);
+
+                            for (int row = fistRow; row < end; row++)
+                            {
+                                int y = startY + row;
+                                Span<float> span = buffer.GetRowSpan(row).Slice(offSetSpan);
+                                app.Apply(span, startX, y);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        private struct DrawingOperation
+        {
+            public Buffer2D<float> Map { get; set; }
+
+            public Point Location { get; set; }
+        }
+
+        private class CachingGlyphRenderer : IGlyphRenderer, IDisposable
+        {
+            // just enough accuracy to allow for 1/8 pixel differences which
+            // later are accumulated while rendering, but do not grow into full pixel offsets
+            // The value 8 is benchmarked to:
+            // - Provide a good accuracy (smaller than 0.2% image difference compared to the non-caching variant)
+            // - Cache hit ratio above 60%
+            private const float AccuracyMultiple = 8;
+
+            private readonly PathBuilder builder;
+
+            private Point currentRenderPosition = default;
+            private (GlyphRendererParameters glyph, PointF subPixelOffset) currentGlyphRenderParams = default;
+            private readonly int offset = 0;
+            private PointF currentPoint = default(PointF);
+
+            private readonly Dictionary<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData>
+                glyphData = new Dictionary<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData>();
+
+            private readonly bool renderOutline = false;
+            private readonly bool renderFill = false;
+            private bool rasterizationRequired = false;
+
+            public CachingGlyphRenderer(MemoryAllocator memoryAllocator, int size, IPen pen, bool renderFill)
+            {
+                this.MemoryAllocator = memoryAllocator;
+                this.Pen = pen;
+                this.renderFill = renderFill;
+                this.renderOutline = pen != null;
+                this.offset = 2;
+                if (this.renderFill)
+                {
+                    this.FillOperations = new List<DrawingOperation>(size);
+                }
+
+                if (this.renderOutline)
+                {
+                    this.offset = (int)MathF.Ceiling((pen.StrokeWidth * 2) + 2);
+                    this.OutlineOperations = new List<DrawingOperation>(size);
+                }
+
+                this.builder = new PathBuilder();
+            }
+
+            public List<DrawingOperation> FillOperations { get; }
+
+            public List<DrawingOperation> OutlineOperations { get; }
+
+            public MemoryAllocator MemoryAllocator { get; internal set; }
+
+            public IPen Pen { get; internal set; }
+
+            public GraphicsOptions Options { get; internal set; }
+
+            public void BeginFigure()
+            {
+                this.builder.StartFigure();
+            }
+
+            public bool BeginGlyph(RectangleF bounds, GlyphRendererParameters parameters)
+            {
+                this.currentRenderPosition = Point.Truncate(bounds.Location);
+                PointF subPixelOffset = bounds.Location - this.currentRenderPosition;
+
+                subPixelOffset.X = MathF.Round(subPixelOffset.X * AccuracyMultiple) / AccuracyMultiple;
+                subPixelOffset.Y = MathF.Round(subPixelOffset.Y * AccuracyMultiple) / AccuracyMultiple;
+
+                // we have offset our rendering origion a little bit down to prevent edge cropping, move the draw origin up to compensate
+                this.currentRenderPosition = new Point(this.currentRenderPosition.X - this.offset, this.currentRenderPosition.Y - this.offset);
+                this.currentGlyphRenderParams = (parameters, subPixelOffset);
+
+                if (this.glyphData.ContainsKey(this.currentGlyphRenderParams))
+                {
+                    // we have already drawn the glyph vectors skip trying again
+                    this.rasterizationRequired = false;
+                    return false;
+                }
+
+                // we check to see if we have a render cache and if we do then we render else
+                this.builder.Clear();
+
+                // ensure all glyphs render around [zero, zero]  so offset negative root positions so when we draw the glyph we can offet it back
+                this.builder.SetOrigin(new PointF(-(int)bounds.X + this.offset, -(int)bounds.Y + this.offset));
+
+                this.rasterizationRequired = true;
+                return true;
+            }
+
+            public void BeginText(RectangleF bounds)
+            {
+                // not concerned about this one
+                this.OutlineOperations?.Clear();
+                this.FillOperations?.Clear();
+            }
+
+            public void CubicBezierTo(PointF secondControlPoint, PointF thirdControlPoint, PointF point)
+            {
+                this.builder.AddBezier(this.currentPoint, secondControlPoint, thirdControlPoint, point);
+                this.currentPoint = point;
+            }
+
+            public void Dispose()
+            {
+                foreach (KeyValuePair<(GlyphRendererParameters glyph, PointF subPixelOffset), GlyphRenderData> kv in this.glyphData)
+                {
+                    kv.Value.Dispose();
+                }
+
+                this.glyphData.Clear();
+            }
+
+            public void EndFigure()
+            {
+                this.builder.CloseFigure();
+            }
+
+            public void EndGlyph()
+            {
+                GlyphRenderData renderData = default;
+
+                // has the glyoh been rendedered already????
+                if (this.rasterizationRequired)
+                {
+                    IPath path = this.builder.Build();
+
+                    if (this.renderFill)
+                    {
+                        renderData.FillMap = this.Render(path);
+                    }
+
+                    if (this.renderOutline)
+                    {
+                        if (this.Pen.StrokePattern.Length == 0)
+                        {
+                            path = path.GenerateOutline(this.Pen.StrokeWidth);
+                        }
+                        else
+                        {
+                            path = path.GenerateOutline(this.Pen.StrokeWidth, this.Pen.StrokePattern);
+                        }
+
+                        renderData.OutlineMap = this.Render(path);
+                    }
+
+                    this.glyphData[this.currentGlyphRenderParams] = renderData;
+                }
+                else
+                {
+                    renderData = this.glyphData[this.currentGlyphRenderParams];
+                }
+
+                if (this.renderFill)
+                {
+                    this.FillOperations.Add(new DrawingOperation
+                                                {
+                                                    Location = this.currentRenderPosition,
+                                                    Map = renderData.FillMap
+                                                });
+                }
+
+                if (this.renderOutline)
+                {
+                    this.OutlineOperations.Add(new DrawingOperation
+                                                   {
+                                                       Location = this.currentRenderPosition,
+                                                       Map = renderData.OutlineMap
+                                                   });
+                }
+            }
+
+            private Buffer2D<float> Render(IPath path)
+            {
+                Size size = Rectangle.Ceiling(path.Bounds).Size;
+                size = new Size(size.Width + (this.offset * 2), size.Height + (this.offset * 2));
+
+                float subpixelCount = 4;
+                float offset = 0.5f;
+                if (this.Options.Antialias)
+                {
+                    offset = 0f; // we are antialising skip offsetting as real antalising should take care of offset.
+                    subpixelCount = this.Options.AntialiasSubpixelDepth;
+                    if (subpixelCount < 4)
+                    {
+                        subpixelCount = 4;
+                    }
+                }
+
+                // take the path inside the path builder, scan thing and generate a Buffer2d representing the glyph and cache it.
+                Buffer2D<float> fullBuffer = this.MemoryAllocator.Allocate2D<float>(size.Width + 1, size.Height + 1, AllocationOptions.Clean);
+
+                using (IMemoryOwner<float> bufferBacking = this.MemoryAllocator.Allocate<float>(path.MaxIntersections))
+                using (IMemoryOwner<PointF> rowIntersectionBuffer = this.MemoryAllocator.Allocate<PointF>(size.Width))
+                {
+                    float subpixelFraction = 1f / subpixelCount;
+                    float subpixelFractionPoint = subpixelFraction / subpixelCount;
+
+                    for (int y = 0; y <= size.Height; y++)
+                    {
+                        Span<float> scanline = fullBuffer.GetRowSpan(y);
+                        bool scanlineDirty = false;
+                        float yPlusOne = y + 1;
+
+                        for (float subPixel = (float)y; subPixel < yPlusOne; subPixel += subpixelFraction)
+                        {
+                            var start = new PointF(path.Bounds.Left - 1, subPixel);
+                            var end = new PointF(path.Bounds.Right + 1, subPixel);
+                            Span<PointF> intersectionSpan = rowIntersectionBuffer.GetSpan();
+                            Span<float> buffer = bufferBacking.GetSpan();
+                            int pointsFound = path.FindIntersections(start, end, intersectionSpan);
+
+                            if (pointsFound == 0)
+                            {
+                                // nothing on this line skip
+                                continue;
+                            }
+
+                            for (int i = 0; i < pointsFound && i < intersectionSpan.Length; i++)
+                            {
+                                buffer[i] = intersectionSpan[i].X;
+                            }
+
+                            QuickSort.Sort(buffer.Slice(0, pointsFound));
+
+                            for (int point = 0; point < pointsFound; point += 2)
+                            {
+                                // points will be paired up
+                                float scanStart = buffer[point];
+                                float scanEnd = buffer[point + 1];
+                                int startX = (int)MathF.Floor(scanStart + offset);
+                                int endX = (int)MathF.Floor(scanEnd + offset);
+
+                                if (startX >= 0 && startX < scanline.Length)
+                                {
+                                    for (float x = scanStart; x < startX + 1; x += subpixelFraction)
+                                    {
+                                        scanline[startX] += subpixelFractionPoint;
+                                        scanlineDirty = true;
+                                    }
+                                }
+
+                                if (endX >= 0 && endX < scanline.Length)
+                                {
+                                    for (float x = endX; x < scanEnd; x += subpixelFraction)
+                                    {
+                                        scanline[endX] += subpixelFractionPoint;
+                                        scanlineDirty = true;
+                                    }
+                                }
+
+                                int nextX = startX + 1;
+                                endX = Math.Min(endX, scanline.Length); // reduce to end to the right edge
+                                nextX = Math.Max(nextX, 0);
+                                for (int x = nextX; x < endX; x++)
+                                {
+                                    scanline[x] += subpixelFraction;
+                                    scanlineDirty = true;
+                                }
+                            }
+                        }
+
+                        if (scanlineDirty)
+                        {
+                            if (!this.Options.Antialias)
+                            {
+                                for (int x = 0; x < size.Width; x++)
+                                {
+                                    if (scanline[x] >= 0.5)
+                                    {
+                                        scanline[x] = 1;
+                                    }
+                                    else
+                                    {
+                                        scanline[x] = 0;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+
+                return fullBuffer;
+            }
+
+            public void EndText()
+            {
+            }
+
+            public void LineTo(PointF point)
+            {
+                this.builder.AddLine(this.currentPoint, point);
+                this.currentPoint = point;
+            }
+
+            public void MoveTo(PointF point)
+            {
+                this.builder.StartFigure();
+                this.currentPoint = point;
+            }
+
+            public void QuadraticBezierTo(PointF secondControlPoint, PointF point)
+            {
+                this.builder.AddBezier(this.currentPoint, secondControlPoint, point);
+                this.currentPoint = point;
+            }
+
+            private struct GlyphRenderData : IDisposable
+            {
+                public Buffer2D<float> FillMap;
+
+                public Buffer2D<float> OutlineMap;
+
+                public void Dispose()
+                {
+                    this.FillMap?.Dispose();
+                    this.OutlineMap?.Dispose();
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs b/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
index 84a97e7d1f..aac0f2e7bd 100644
--- a/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
@@ -12,7 +12,6 @@ namespace SixLabors.ImageSharp.Processing
     /// A Circular Gradient Brush, defined by center point and radius.
     /// </summary>
     public sealed class RadialGradientBrush : GradientBrushBase
-        
     {
         private readonly PointF center;
 
diff --git a/src/ImageSharp.Drawing/Processing/SolidBrush.cs b/src/ImageSharp.Drawing/Processing/SolidBrush.cs
index 75ca5aa7e8..c62566f6b7 100644
--- a/src/ImageSharp.Drawing/Processing/SolidBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/SolidBrush.cs
@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.Processing
         private readonly Color color;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="SolidBrush{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="SolidBrush"/> class.
         /// </summary>
         /// <param name="color">The color.</param>
         public SolidBrush(Color color)
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.Processing
             where TPixel : struct, IPixel<TPixel>
         {
             /// <summary>
-            /// Initializes a new instance of the <see cref="SolidBrushApplicator"/> class.
+            /// Initializes a new instance of the <see cref="SolidBrushApplicator{TPixel}"/> class.
             /// </summary>
             /// <param name="source">The source image.</param>
             /// <param name="color">The color.</param>
diff --git a/src/ImageSharp.Drawing/Processing/TextGraphicsOptions.cs b/src/ImageSharp.Drawing/Processing/TextGraphicsOptions.cs
index 3c682a761b..7f7332a57c 100644
--- a/src/ImageSharp.Drawing/Processing/TextGraphicsOptions.cs
+++ b/src/ImageSharp.Drawing/Processing/TextGraphicsOptions.cs
@@ -1,169 +1,163 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.Fonts;
-using SixLabors.ImageSharp.PixelFormats;
-
-namespace SixLabors.ImageSharp.Processing
-{
-    /// <summary>
-    /// Options for influencing the drawing functions.
-    /// </summary>
-    public struct TextGraphicsOptions
-    {
-        private const int DefaultTextDpi = 72;
-
-        /// <summary>
-        /// Represents the default <see cref="TextGraphicsOptions"/>.
-        /// </summary>
-        public static readonly TextGraphicsOptions Default = new TextGraphicsOptions(true);
-
-        private float? blendPercentage;
-
-        private int? antialiasSubpixelDepth;
-
-        private bool? antialias;
-
-        private bool? applyKerning;
-
-        private float? tabWidth;
-
-        private float? dpiX;
-
-        private float? dpiY;
-
-        private PixelColorBlendingMode colorBlendingMode;
-
-        private PixelAlphaCompositionMode alphaCompositionMode;
-
-        private float wrapTextWidth;
-
-        private HorizontalAlignment? horizontalAlignment;
-
-        private VerticalAlignment? verticalAlignment;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="TextGraphicsOptions" /> struct.
-        /// </summary>
-        /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
-        public TextGraphicsOptions(bool enableAntialiasing)
-        {
-            this.applyKerning = true;
-            this.tabWidth = 4;
-            this.wrapTextWidth = 0;
-            this.horizontalAlignment = HorizontalAlignment.Left;
-            this.verticalAlignment = VerticalAlignment.Top;
-
-            this.antialiasSubpixelDepth = 16;
-            this.colorBlendingMode = PixelColorBlendingMode.Normal;
-            this.alphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
-            this.blendPercentage = 1;
-            this.antialias = enableAntialiasing;
-            this.dpiX = DefaultTextDpi;
-            this.dpiY = DefaultTextDpi;
-        }
-
-        /// <summary>
-        /// Gets or sets a value indicating whether antialiasing should be applied.
-        /// </summary>
-        public bool Antialias { get => this.antialias ?? true; set => this.antialias = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the number of subpixels to use while rendering with antialiasing enabled.
-        /// </summary>
-        public int AntialiasSubpixelDepth { get => this.antialiasSubpixelDepth ?? 16; set => this.antialiasSubpixelDepth = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the blending percentage to apply to the drawing operation
-        /// </summary>
-        public float BlendPercentage { get => (this.blendPercentage ?? 1).Clamp(0, 1); set => this.blendPercentage = value; }
-
-        // In the future we could expose a PixelBlender<TPixel> directly on here
-        // or some forms of PixelBlender factory for each pixel type. Will need
-        // some API thought post V1.
-
-        /// <summary>
-        /// Gets or sets a value indicating the color blending percentage to apply to the drawing operation
-        /// </summary>
-        public PixelColorBlendingMode ColorBlendingMode { get => this.colorBlendingMode; set => this.colorBlendingMode = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the color blending percentage to apply to the drawing operation
-        /// </summary>
-        public PixelAlphaCompositionMode AlphaCompositionMode { get => this.alphaCompositionMode; set => this.alphaCompositionMode = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating whether the text should be drawing with kerning enabled.
-        /// </summary>
-        public bool ApplyKerning { get => this.applyKerning ?? true; set => this.applyKerning = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the number of space widths a tab should lock to.
-        /// </summary>
-        public float TabWidth { get => this.tabWidth ?? 4; set => this.tabWidth = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating if greater than zero determine the width at which text should wrap.
-        /// </summary>
-        public float WrapTextWidth { get => this.wrapTextWidth; set => this.wrapTextWidth = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the DPI to render text along the X axis.
-        /// </summary>
-        public float DpiX { get => this.dpiX ?? DefaultTextDpi; set => this.dpiX = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating the DPI to render text along the Y axis.
-        /// </summary>
-        public float DpiY { get => this.dpiY ?? DefaultTextDpi; set => this.dpiY = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating how to align the text relative to the rendering space.
-        /// If <see cref="WrapTextWidth"/> is greater than zero it will align relative to the space
-        /// defined by the location and width, if <see cref="WrapTextWidth"/> equals zero, and thus
-        /// wrapping disabled, then the alignment is relative to the drawing location.
-        /// </summary>
-        public HorizontalAlignment HorizontalAlignment { get => this.horizontalAlignment ?? HorizontalAlignment.Left; set => this.horizontalAlignment = value; }
-
-        /// <summary>
-        /// Gets or sets a value indicating how to align the text relative to the rendering space.
-        /// </summary>
-        public VerticalAlignment VerticalAlignment { get => this.verticalAlignment ?? VerticalAlignment.Top; set => this.verticalAlignment = value; }
-
-        /// <summary>
-        /// Performs an implicit conversion from <see cref="GraphicsOptions"/> to <see cref="TextGraphicsOptions"/>.
-        /// </summary>
-        /// <param name="options">The options.</param>
-        /// <returns>
-        /// The result of the conversion.
-        /// </returns>
-        public static implicit operator TextGraphicsOptions(GraphicsOptions options)
-        {
-            return new TextGraphicsOptions(options.Antialias)
-            {
-                AntialiasSubpixelDepth = options.AntialiasSubpixelDepth,
-                blendPercentage = options.BlendPercentage,
-                colorBlendingMode = options.ColorBlendingMode,
-                alphaCompositionMode = options.AlphaCompositionMode
-            };
-        }
-
-        /// <summary>
-        /// Performs an explicit conversion from <see cref="TextGraphicsOptions"/> to <see cref="GraphicsOptions"/>.
-        /// </summary>
-        /// <param name="options">The options.</param>
-        /// <returns>
-        /// The result of the conversion.
-        /// </returns>
-        public static explicit operator GraphicsOptions(TextGraphicsOptions options)
-        {
-            return new GraphicsOptions(options.Antialias)
-            {
-                AntialiasSubpixelDepth = options.AntialiasSubpixelDepth,
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.Fonts;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing
+{
+    /// <summary>
+    /// Options for influencing the drawing functions.
+    /// </summary>
+    public struct TextGraphicsOptions
+    {
+        private const int DefaultTextDpi = 72;
+
+        /// <summary>
+        /// Represents the default <see cref="TextGraphicsOptions"/>.
+        /// </summary>
+        public static readonly TextGraphicsOptions Default = new TextGraphicsOptions(true);
+
+        private float? blendPercentage;
+
+        private int? antialiasSubpixelDepth;
+
+        private bool? antialias;
+
+        private bool? applyKerning;
+
+        private float? tabWidth;
+
+        private float? dpiX;
+
+        private float? dpiY;
+
+        private HorizontalAlignment? horizontalAlignment;
+
+        private VerticalAlignment? verticalAlignment;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TextGraphicsOptions" /> struct.
+        /// </summary>
+        /// <param name="enableAntialiasing">If set to <c>true</c> [enable antialiasing].</param>
+        public TextGraphicsOptions(bool enableAntialiasing)
+        {
+            this.applyKerning = true;
+            this.tabWidth = 4;
+            this.WrapTextWidth = 0;
+            this.horizontalAlignment = HorizontalAlignment.Left;
+            this.verticalAlignment = VerticalAlignment.Top;
+
+            this.antialiasSubpixelDepth = 16;
+            this.ColorBlendingMode = PixelColorBlendingMode.Normal;
+            this.AlphaCompositionMode = PixelAlphaCompositionMode.SrcOver;
+            this.blendPercentage = 1;
+            this.antialias = enableAntialiasing;
+            this.dpiX = DefaultTextDpi;
+            this.dpiY = DefaultTextDpi;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether antialiasing should be applied.
+        /// </summary>
+        public bool Antialias { get => this.antialias ?? true; set => this.antialias = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the number of subpixels to use while rendering with antialiasing enabled.
+        /// </summary>
+        public int AntialiasSubpixelDepth { get => this.antialiasSubpixelDepth ?? 16; set => this.antialiasSubpixelDepth = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the blending percentage to apply to the drawing operation
+        /// </summary>
+        public float BlendPercentage { get => (this.blendPercentage ?? 1).Clamp(0, 1); set => this.blendPercentage = value; }
+
+        // In the future we could expose a PixelBlender<TPixel> directly on here
+        // or some forms of PixelBlender factory for each pixel type. Will need
+        // some API thought post V1.
+
+        /// <summary>
+        /// Gets or sets a value indicating the color blending percentage to apply to the drawing operation
+        /// </summary>
+        public PixelColorBlendingMode ColorBlendingMode { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the color blending percentage to apply to the drawing operation
+        /// </summary>
+        public PixelAlphaCompositionMode AlphaCompositionMode { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the text should be drawing with kerning enabled.
+        /// </summary>
+        public bool ApplyKerning { get => this.applyKerning ?? true; set => this.applyKerning = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the number of space widths a tab should lock to.
+        /// </summary>
+        public float TabWidth { get => this.tabWidth ?? 4; set => this.tabWidth = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating if greater than zero determine the width at which text should wrap.
+        /// </summary>
+        public float WrapTextWidth { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the DPI to render text along the X axis.
+        /// </summary>
+        public float DpiX { get => this.dpiX ?? DefaultTextDpi; set => this.dpiX = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating the DPI to render text along the Y axis.
+        /// </summary>
+        public float DpiY { get => this.dpiY ?? DefaultTextDpi; set => this.dpiY = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating how to align the text relative to the rendering space.
+        /// If <see cref="WrapTextWidth"/> is greater than zero it will align relative to the space
+        /// defined by the location and width, if <see cref="WrapTextWidth"/> equals zero, and thus
+        /// wrapping disabled, then the alignment is relative to the drawing location.
+        /// </summary>
+        public HorizontalAlignment HorizontalAlignment { get => this.horizontalAlignment ?? HorizontalAlignment.Left; set => this.horizontalAlignment = value; }
+
+        /// <summary>
+        /// Gets or sets a value indicating how to align the text relative to the rendering space.
+        /// </summary>
+        public VerticalAlignment VerticalAlignment { get => this.verticalAlignment ?? VerticalAlignment.Top; set => this.verticalAlignment = value; }
+
+        /// <summary>
+        /// Performs an implicit conversion from <see cref="GraphicsOptions"/> to <see cref="TextGraphicsOptions"/>.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        /// <returns>
+        /// The result of the conversion.
+        /// </returns>
+        public static implicit operator TextGraphicsOptions(GraphicsOptions options)
+        {
+            return new TextGraphicsOptions(options.Antialias)
+            {
+                AntialiasSubpixelDepth = options.AntialiasSubpixelDepth,
+                blendPercentage = options.BlendPercentage,
+                ColorBlendingMode = options.ColorBlendingMode,
+                AlphaCompositionMode = options.AlphaCompositionMode
+            };
+        }
+
+        /// <summary>
+        /// Performs an explicit conversion from <see cref="TextGraphicsOptions"/> to <see cref="GraphicsOptions"/>.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        /// <returns>
+        /// The result of the conversion.
+        /// </returns>
+        public static explicit operator GraphicsOptions(TextGraphicsOptions options)
+        {
+            return new GraphicsOptions(options.Antialias)
+            {
+                AntialiasSubpixelDepth = options.AntialiasSubpixelDepth,
                 ColorBlendingMode = options.ColorBlendingMode,
-                AlphaCompositionMode = options.AlphaCompositionMode,
-                BlendPercentage = options.BlendPercentage
-            };
-        }
-    }
+                AlphaCompositionMode = options.AlphaCompositionMode,
+                BlendPercentage = options.BlendPercentage
+            };
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index db03281064..3f3d6a62f7 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -87,7 +87,7 @@ namespace SixLabors.ImageSharp
             EncodeVisitor visitor = new EncodeVisitor(encoder, stream);
             this.AcceptVisitor(visitor);
         }
-        
+
         /// <summary>
         /// Returns a copy of the image in the given pixel format.
         /// </summary>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 4abe2f57a2..1b213c26dc 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -41,7 +41,7 @@
 
   <ItemGroup>
     <AdditionalFiles Include="..\..\standards\stylecop.json" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-rc.114" PrivateAssets="All" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
     <PackageReference Include="SixLabors.Core" Version="1.0.0-dev000101" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
   </ItemGroup>

From e96c0e83ae6e9194fd4a3f158b82a520791f4c82 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Mon, 13 May 2019 23:59:50 +0200
Subject: [PATCH 190/223] fix remaining stylecop issues

---
 .../Processing/DrawingHelpers.cs              |  7 ++-
 .../Extensions/DrawPathExtensions.cs          | 58 +++++++++++--------
 .../Extensions/FillPathExtensions.cs          | 33 +++++------
 .../Extensions/FillRegionExtensions.cs        | 54 ++++++++---------
 .../Processing/GradientBrushBase.cs           |  2 +-
 .../Processing/GradientRepetitionMode.cs      |  6 +-
 src/ImageSharp.Drawing/Processing/IBrush.cs   |  4 +-
 src/ImageSharp.Drawing/Processing/IPen.cs     |  5 +-
 .../Processing/ImageBrush.cs                  |  2 +-
 .../Processing/LinearGradientBrush.cs         | 18 ++++--
 10 files changed, 102 insertions(+), 87 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs b/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs
index 314b65f7e7..b4ce0c5cba 100644
--- a/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs
+++ b/src/ImageSharp.Drawing/Processing/DrawingHelpers.cs
@@ -1,5 +1,5 @@
-// // Copyright (c) Six Labors and contributors.
-// // Licensed under the Apache License, Version 2.0.
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
@@ -8,6 +8,9 @@ namespace SixLabors.ImageSharp.Processing
 {
     internal static class DrawingHelpers
     {
+        /// <summary>
+        /// Convert a <see cref="DenseMatrix{Color}"/> to a <see cref="DenseMatrix{T}"/> of the given pixel type.
+        /// </summary>
         public static DenseMatrix<TPixel> ToPixelMatrix<TPixel>(this DenseMatrix<Color> colorMatrix, Configuration configuration)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs
index f231f1baae..efafdde5ab 100644
--- a/src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/Extensions/DrawPathExtensions.cs
@@ -15,80 +15,90 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, IPen pen, IPath path)
-            
-            => source.Fill(options, pen.StrokeFill, new ShapePath(path, pen));
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IPen pen,
+            IPath path) =>
+            source.Fill(options, pen.StrokeFill, new ShapePath(path, pen));
 
         /// <summary>
         /// Draws the outline of the polygon with the provided pen.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="pen">The pen.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, IPen pen, IPath path)
-            
-            => source.Draw(GraphicsOptions.Default, pen, path);
+        public static IImageProcessingContext Draw(this IImageProcessingContext source, IPen pen, IPath path) =>
+            source.Draw(GraphicsOptions.Default, pen, path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, float thickness, IPath path)
-            
-            => source.Draw(options, new Pen(brush, thickness), path);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            float thickness,
+            IPath path) =>
+            source.Draw(options, new Pen(brush, thickness), path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, IBrush brush, float thickness, IPath path)
-            
-            => source.Draw(new Pen(brush, thickness), path);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            IBrush brush,
+            float thickness,
+            IPath path) =>
+            source.Draw(new Pen(brush, thickness), path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, GraphicsOptions options, Color color, float thickness, IPath path)
-            
-            => source.Draw(options, new SolidBrush(color), thickness, path);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            float thickness,
+            IPath path) =>
+            source.Draw(options, new SolidBrush(color), thickness, path);
 
         /// <summary>
         /// Draws the outline of the polygon with the provided brush at the provided thickness.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="thickness">The thickness.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Draw(this IImageProcessingContext source, Color color, float thickness, IPath path)
-            
-            => source.Draw(new SolidBrush(color), thickness, path);
+        public static IImageProcessingContext Draw(
+            this IImageProcessingContext source,
+            Color color,
+            float thickness,
+            IPath path) =>
+            source.Draw(new SolidBrush(color), thickness, path);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs
index 7cf67612a2..718016a9e6 100644
--- a/src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/Extensions/FillPathExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.Shapes;
 
@@ -15,51 +14,51 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The shape.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, IPath path)
-            
-            => source.Fill(options, brush, new ShapeRegion(path));
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            IPath path) =>
+            source.Fill(options, brush, new ShapeRegion(path));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, IPath path)
-            
-            => source.Fill(GraphicsOptions.Default, brush, new ShapeRegion(path));
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, IPath path) =>
+            source.Fill(GraphicsOptions.Default, brush, new ShapeRegion(path));
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush..
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, Color color, IPath path)
-            
-            => source.Fill(options, new SolidBrush(color), path);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            IPath path) =>
+            source.Fill(options, new SolidBrush(color), path);
 
         /// <summary>
         /// Flood fills the image in the shape of the provided polygon with the specified brush..
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="path">The path.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, IPath path)
-            
-            => source.Fill(new SolidBrush(color), path);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, IPath path) =>
+            source.Fill(new SolidBrush(color), path);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs b/src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs
index 457ad98b0c..294e575140 100644
--- a/src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs
+++ b/src/ImageSharp.Drawing/Processing/Extensions/FillRegionExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Primitives;
 using SixLabors.ImageSharp.Processing.Processors.Drawing;
 
@@ -15,85 +14,82 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Flood fills the image with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The details how to fill the region of interest.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush)
-            
-            => source.Fill(GraphicsOptions.Default, brush);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush) =>
+            source.Fill(GraphicsOptions.Default, brush);
 
         /// <summary>
         /// Flood fills the image with the specified color.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color)
-            
-            => source.Fill(new SolidBrush(color));
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color) =>
+            source.Fill(new SolidBrush(color));
 
         /// <summary>
         /// Flood fills the image with in the region with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, Region region)
-            
-            => source.Fill(GraphicsOptions.Default, brush, region);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, IBrush brush, Region region) =>
+            source.Fill(GraphicsOptions.Default, brush, region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified color.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The options.</param>
         /// <param name="color">The color.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, Color color, Region region)
-            
-            => source.Fill(options, new SolidBrush(color), region);
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            Color color,
+            Region region) =>
+            source.Fill(options, new SolidBrush(color), region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified color.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="color">The color.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, Region region)
-            
-            => source.Fill(new SolidBrush(color), region);
+        public static IImageProcessingContext Fill(this IImageProcessingContext source, Color color, Region region) =>
+            source.Fill(new SolidBrush(color), region);
 
         /// <summary>
         /// Flood fills the image with in the region with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The brush.</param>
         /// <param name="region">The region.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush, Region region)
-            
-            => source.ApplyProcessor(new FillRegionProcessor(brush, region, options));
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush,
+            Region region) =>
+            source.ApplyProcessor(new FillRegionProcessor(brush, region, options));
 
         /// <summary>
         /// Flood fills the image with the specified brush.
         /// </summary>
-        
         /// <param name="source">The image this method extends.</param>
         /// <param name="options">The graphics options.</param>
         /// <param name="brush">The details how to fill the region of interest.</param>
         /// <returns>The <see cref="Image{TPixel}"/>.</returns>
-        public static IImageProcessingContext Fill(this IImageProcessingContext source, GraphicsOptions options, IBrush brush)
-            
-            => source.ApplyProcessor(new FillProcessor(brush, options));
+        public static IImageProcessingContext Fill(
+            this IImageProcessingContext source,
+            GraphicsOptions options,
+            IBrush brush) =>
+            source.ApplyProcessor(new FillProcessor(brush, options));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
index a877ea96cd..6e1e0086da 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Base class for gradient brush applicators
         /// </summary>
-        protected abstract class GradientBrushApplicatorBase<TPixel> : BrushApplicator<TPixel>
+        internal abstract class GradientBrushApplicatorBase<TPixel> : BrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
             private readonly ColorStop[] colorStops;
diff --git a/src/ImageSharp.Drawing/Processing/GradientRepetitionMode.cs b/src/ImageSharp.Drawing/Processing/GradientRepetitionMode.cs
index c156153be5..6aed8a030c 100644
--- a/src/ImageSharp.Drawing/Processing/GradientRepetitionMode.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientRepetitionMode.cs
@@ -21,16 +21,16 @@ namespace SixLabors.ImageSharp.Processing
 
         /// <summary>
         /// Reflect the gradient.
-        /// Similar to <see cref="Repeat"/>, but each other repetition uses inverse order of <see cref="ColorStop{TPixel}"/>s.
+        /// Similar to <see cref="Repeat"/>, but each other repetition uses inverse order of <see cref="ColorStop"/>s.
         /// Used on a Black-White gradient, Reflect leads to Black->{gray}->White->{gray}->White...
         /// </summary>
         Reflect,
 
         /// <summary>
         /// With DontFill a gradient does not touch any pixel beyond it's borders.
-        /// For the <see cref="LinearGradientBrush{TPixel}" /> this is beyond the orthogonal through start and end,
+        /// For the <see cref="LinearGradientBrush" /> this is beyond the orthogonal through start and end,
         /// TODO For the cref="PolygonalGradientBrush" it's outside the polygon,
-        /// For <see cref="RadialGradientBrush{TPixel}" /> and <see cref="EllipticGradientBrush{TPixel}" /> it's beyond 1.0.
+        /// For <see cref="RadialGradientBrush" /> and <see cref="EllipticGradientBrush" /> it's beyond 1.0.
         /// </summary>
         DontFill
     }
diff --git a/src/ImageSharp.Drawing/Processing/IBrush.cs b/src/ImageSharp.Drawing/Processing/IBrush.cs
index aa8c25b950..0cd2e20fda 100644
--- a/src/ImageSharp.Drawing/Processing/IBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/IBrush.cs
@@ -9,16 +9,16 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Brush represents a logical configuration of a brush which can be used to source pixel colors
     /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
     /// <remarks>
     /// A brush is a simple class that will return an <see cref="BrushApplicator{TPixel}" /> that will perform the
-    /// logic for converting a pixel location to a <typeparamref name="TPixel"/>.
+    /// logic for retrieving pixel values for specific locations.
     /// </remarks>
     public interface IBrush
     {
         /// <summary>
         /// Creates the applicator for this brush.
         /// </summary>
+        /// <typeparam name="TPixel">The pixel type.</typeparam>
         /// <param name="source">The source image.</param>
         /// <param name="region">The region the brush will be applied to.</param>
         /// <param name="options">The graphic options</param>
diff --git a/src/ImageSharp.Drawing/Processing/IPen.cs b/src/ImageSharp.Drawing/Processing/IPen.cs
index b9e359d601..af7517905d 100644
--- a/src/ImageSharp.Drawing/Processing/IPen.cs
+++ b/src/ImageSharp.Drawing/Processing/IPen.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Processing
@@ -15,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing
         /// Gets the stroke fill.
         /// </summary>
         IBrush StrokeFill { get; }
-        
+
         /// <summary>
         /// Gets the width to apply to the stroke
         /// </summary>
@@ -26,4 +27,4 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         ReadOnlySpan<float> StrokePattern { get; }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ImageSharp.Drawing/Processing/ImageBrush.cs b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
index c2a8d3a261..33f7b831ab 100644
--- a/src/ImageSharp.Drawing/Processing/ImageBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/ImageBrush.cs
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.Processing
             }
 
             specificImage = this.image.CloneAs<TPixel>();
-            
+
             return new ImageBrushApplicator<TPixel>(source, specificImage, region, options, true);
         }
 
diff --git a/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
index fac43ad634..6eeadee5d6 100644
--- a/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
@@ -14,7 +14,6 @@ namespace SixLabors.ImageSharp.Processing
     /// - a set of colors in relative distances to each other.
     /// </summary>
     public sealed class LinearGradientBrush : GradientBrushBase
-        
     {
         private readonly PointF p1;
 
@@ -39,8 +38,17 @@ namespace SixLabors.ImageSharp.Processing
         }
 
         /// <inheritdoc />
-        public override BrushApplicator<TPixel> CreateApplicator<TPixel>(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
-            => new LinearGradientBrushApplicator<TPixel>(source, this.p1, this.p2, this.ColorStops, this.RepetitionMode, options);
+        public override BrushApplicator<TPixel> CreateApplicator<TPixel>(
+            ImageFrame<TPixel> source,
+            RectangleF region,
+            GraphicsOptions options) =>
+            new LinearGradientBrushApplicator<TPixel>(
+                source,
+                this.p1,
+                this.p2,
+                this.ColorStops,
+                this.RepetitionMode,
+                options);
 
         /// <summary>
         /// The linear gradient brush applicator.
@@ -137,9 +145,7 @@ namespace SixLabors.ImageSharp.Processing
                     float y4 = y + (k * this.alongX);
 
                     // get distance from (x4,y4) to start
-                    float distance = (float)Math.Sqrt(
-                        Math.Pow(x4 - this.start.X, 2)
-                        + Math.Pow(y4 - this.start.Y, 2));
+                    float distance = (float)Math.Sqrt(Math.Pow(x4 - this.start.X, 2) + Math.Pow(y4 - this.start.Y, 2));
 
                     // get and return ratio
                     float ratio = distance / this.length;

From 0a3fb502c179cd3b22af41a23a9f23153a9efe4d Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Tue, 14 May 2019 00:01:50 +0200
Subject: [PATCH 191/223] Rgba32.Definitions: use Color instead of
 NamedColors<T>

---
 .../Rgba32.Definitions.cs                     | 284 +++++++++---------
 1 file changed, 142 insertions(+), 142 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.Definitions.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.Definitions.cs
index 032d0b5464..f9cc3256cd 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.Definitions.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.Definitions.cs
@@ -11,711 +11,711 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F0F8FF.
         /// </summary>
-        public static readonly Rgba32 AliceBlue = NamedColors<Rgba32>.AliceBlue;
+        public static readonly Rgba32 AliceBlue = Color.AliceBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FAEBD7.
         /// </summary>
-        public static readonly Rgba32 AntiqueWhite = NamedColors<Rgba32>.AntiqueWhite;
+        public static readonly Rgba32 AntiqueWhite = Color.AntiqueWhite;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00FFFF.
         /// </summary>
-        public static readonly Rgba32 Aqua = NamedColors<Rgba32>.Aqua;
+        public static readonly Rgba32 Aqua = Color.Aqua;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #7FFFD4.
         /// </summary>
-        public static readonly Rgba32 Aquamarine = NamedColors<Rgba32>.Aquamarine;
+        public static readonly Rgba32 Aquamarine = Color.Aquamarine;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F0FFFF.
         /// </summary>
-        public static readonly Rgba32 Azure = NamedColors<Rgba32>.Azure;
+        public static readonly Rgba32 Azure = Color.Azure;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F5F5DC.
         /// </summary>
-        public static readonly Rgba32 Beige = NamedColors<Rgba32>.Beige;
+        public static readonly Rgba32 Beige = Color.Beige;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFE4C4.
         /// </summary>
-        public static readonly Rgba32 Bisque = NamedColors<Rgba32>.Bisque;
+        public static readonly Rgba32 Bisque = Color.Bisque;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #000000.
         /// </summary>
-        public static readonly Rgba32 Black = NamedColors<Rgba32>.Black;
+        public static readonly Rgba32 Black = Color.Black;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFEBCD.
         /// </summary>
-        public static readonly Rgba32 BlanchedAlmond = NamedColors<Rgba32>.BlanchedAlmond;
+        public static readonly Rgba32 BlanchedAlmond = Color.BlanchedAlmond;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #0000FF.
         /// </summary>
-        public static readonly Rgba32 Blue = NamedColors<Rgba32>.Blue;
+        public static readonly Rgba32 Blue = Color.Blue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #8A2BE2.
         /// </summary>
-        public static readonly Rgba32 BlueViolet = NamedColors<Rgba32>.BlueViolet;
+        public static readonly Rgba32 BlueViolet = Color.BlueViolet;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #A52A2A.
         /// </summary>
-        public static readonly Rgba32 Brown = NamedColors<Rgba32>.Brown;
+        public static readonly Rgba32 Brown = Color.Brown;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DEB887.
         /// </summary>
-        public static readonly Rgba32 BurlyWood = NamedColors<Rgba32>.BurlyWood;
+        public static readonly Rgba32 BurlyWood = Color.BurlyWood;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #5F9EA0.
         /// </summary>
-        public static readonly Rgba32 CadetBlue = NamedColors<Rgba32>.CadetBlue;
+        public static readonly Rgba32 CadetBlue = Color.CadetBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #7FFF00.
         /// </summary>
-        public static readonly Rgba32 Chartreuse = NamedColors<Rgba32>.Chartreuse;
+        public static readonly Rgba32 Chartreuse = Color.Chartreuse;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #D2691E.
         /// </summary>
-        public static readonly Rgba32 Chocolate = NamedColors<Rgba32>.Chocolate;
+        public static readonly Rgba32 Chocolate = Color.Chocolate;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF7F50.
         /// </summary>
-        public static readonly Rgba32 Coral = NamedColors<Rgba32>.Coral;
+        public static readonly Rgba32 Coral = Color.Coral;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #6495ED.
         /// </summary>
-        public static readonly Rgba32 CornflowerBlue = NamedColors<Rgba32>.CornflowerBlue;
+        public static readonly Rgba32 CornflowerBlue = Color.CornflowerBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFF8DC.
         /// </summary>
-        public static readonly Rgba32 Cornsilk = NamedColors<Rgba32>.Cornsilk;
+        public static readonly Rgba32 Cornsilk = Color.Cornsilk;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DC143C.
         /// </summary>
-        public static readonly Rgba32 Crimson = NamedColors<Rgba32>.Crimson;
+        public static readonly Rgba32 Crimson = Color.Crimson;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00FFFF.
         /// </summary>
-        public static readonly Rgba32 Cyan = NamedColors<Rgba32>.Cyan;
+        public static readonly Rgba32 Cyan = Color.Cyan;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00008B.
         /// </summary>
-        public static readonly Rgba32 DarkBlue = NamedColors<Rgba32>.DarkBlue;
+        public static readonly Rgba32 DarkBlue = Color.DarkBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #008B8B.
         /// </summary>
-        public static readonly Rgba32 DarkCyan = NamedColors<Rgba32>.DarkCyan;
+        public static readonly Rgba32 DarkCyan = Color.DarkCyan;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #B8860B.
         /// </summary>
-        public static readonly Rgba32 DarkGoldenrod = NamedColors<Rgba32>.DarkGoldenrod;
+        public static readonly Rgba32 DarkGoldenrod = Color.DarkGoldenrod;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #A9A9A9.
         /// </summary>
-        public static readonly Rgba32 DarkGray = NamedColors<Rgba32>.DarkGray;
+        public static readonly Rgba32 DarkGray = Color.DarkGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #006400.
         /// </summary>
-        public static readonly Rgba32 DarkGreen = NamedColors<Rgba32>.DarkGreen;
+        public static readonly Rgba32 DarkGreen = Color.DarkGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #BDB76B.
         /// </summary>
-        public static readonly Rgba32 DarkKhaki = NamedColors<Rgba32>.DarkKhaki;
+        public static readonly Rgba32 DarkKhaki = Color.DarkKhaki;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #8B008B.
         /// </summary>
-        public static readonly Rgba32 DarkMagenta = NamedColors<Rgba32>.DarkMagenta;
+        public static readonly Rgba32 DarkMagenta = Color.DarkMagenta;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #556B2F.
         /// </summary>
-        public static readonly Rgba32 DarkOliveGreen = NamedColors<Rgba32>.DarkOliveGreen;
+        public static readonly Rgba32 DarkOliveGreen = Color.DarkOliveGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF8C00.
         /// </summary>
-        public static readonly Rgba32 DarkOrange = NamedColors<Rgba32>.DarkOrange;
+        public static readonly Rgba32 DarkOrange = Color.DarkOrange;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #9932CC.
         /// </summary>
-        public static readonly Rgba32 DarkOrchid = NamedColors<Rgba32>.DarkOrchid;
+        public static readonly Rgba32 DarkOrchid = Color.DarkOrchid;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #8B0000.
         /// </summary>
-        public static readonly Rgba32 DarkRed = NamedColors<Rgba32>.DarkRed;
+        public static readonly Rgba32 DarkRed = Color.DarkRed;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #E9967A.
         /// </summary>
-        public static readonly Rgba32 DarkSalmon = NamedColors<Rgba32>.DarkSalmon;
+        public static readonly Rgba32 DarkSalmon = Color.DarkSalmon;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #8FBC8B.
         /// </summary>
-        public static readonly Rgba32 DarkSeaGreen = NamedColors<Rgba32>.DarkSeaGreen;
+        public static readonly Rgba32 DarkSeaGreen = Color.DarkSeaGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #483D8B.
         /// </summary>
-        public static readonly Rgba32 DarkSlateBlue = NamedColors<Rgba32>.DarkSlateBlue;
+        public static readonly Rgba32 DarkSlateBlue = Color.DarkSlateBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #2F4F4F.
         /// </summary>
-        public static readonly Rgba32 DarkSlateGray = NamedColors<Rgba32>.DarkSlateGray;
+        public static readonly Rgba32 DarkSlateGray = Color.DarkSlateGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00CED1.
         /// </summary>
-        public static readonly Rgba32 DarkTurquoise = NamedColors<Rgba32>.DarkTurquoise;
+        public static readonly Rgba32 DarkTurquoise = Color.DarkTurquoise;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #9400D3.
         /// </summary>
-        public static readonly Rgba32 DarkViolet = NamedColors<Rgba32>.DarkViolet;
+        public static readonly Rgba32 DarkViolet = Color.DarkViolet;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF1493.
         /// </summary>
-        public static readonly Rgba32 DeepPink = NamedColors<Rgba32>.DeepPink;
+        public static readonly Rgba32 DeepPink = Color.DeepPink;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00BFFF.
         /// </summary>
-        public static readonly Rgba32 DeepSkyBlue = NamedColors<Rgba32>.DeepSkyBlue;
+        public static readonly Rgba32 DeepSkyBlue = Color.DeepSkyBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #696969.
         /// </summary>
-        public static readonly Rgba32 DimGray = NamedColors<Rgba32>.DimGray;
+        public static readonly Rgba32 DimGray = Color.DimGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #1E90FF.
         /// </summary>
-        public static readonly Rgba32 DodgerBlue = NamedColors<Rgba32>.DodgerBlue;
+        public static readonly Rgba32 DodgerBlue = Color.DodgerBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #B22222.
         /// </summary>
-        public static readonly Rgba32 Firebrick = NamedColors<Rgba32>.Firebrick;
+        public static readonly Rgba32 Firebrick = Color.Firebrick;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFAF0.
         /// </summary>
-        public static readonly Rgba32 FloralWhite = NamedColors<Rgba32>.FloralWhite;
+        public static readonly Rgba32 FloralWhite = Color.FloralWhite;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #228B22.
         /// </summary>
-        public static readonly Rgba32 ForestGreen = NamedColors<Rgba32>.ForestGreen;
+        public static readonly Rgba32 ForestGreen = Color.ForestGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF00FF.
         /// </summary>
-        public static readonly Rgba32 Fuchsia = NamedColors<Rgba32>.Fuchsia;
+        public static readonly Rgba32 Fuchsia = Color.Fuchsia;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DCDCDC.
         /// </summary>
-        public static readonly Rgba32 Gainsboro = NamedColors<Rgba32>.Gainsboro;
+        public static readonly Rgba32 Gainsboro = Color.Gainsboro;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F8F8FF.
         /// </summary>
-        public static readonly Rgba32 GhostWhite = NamedColors<Rgba32>.GhostWhite;
+        public static readonly Rgba32 GhostWhite = Color.GhostWhite;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFD700.
         /// </summary>
-        public static readonly Rgba32 Gold = NamedColors<Rgba32>.Gold;
+        public static readonly Rgba32 Gold = Color.Gold;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DAA520.
         /// </summary>
-        public static readonly Rgba32 Goldenrod = NamedColors<Rgba32>.Goldenrod;
+        public static readonly Rgba32 Goldenrod = Color.Goldenrod;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #808080.
         /// </summary>
-        public static readonly Rgba32 Gray = NamedColors<Rgba32>.Gray;
+        public static readonly Rgba32 Gray = Color.Gray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #008000.
         /// </summary>
-        public static readonly Rgba32 Green = NamedColors<Rgba32>.Green;
+        public static readonly Rgba32 Green = Color.Green;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #ADFF2F.
         /// </summary>
-        public static readonly Rgba32 GreenYellow = NamedColors<Rgba32>.GreenYellow;
+        public static readonly Rgba32 GreenYellow = Color.GreenYellow;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F0FFF0.
         /// </summary>
-        public static readonly Rgba32 Honeydew = NamedColors<Rgba32>.Honeydew;
+        public static readonly Rgba32 Honeydew = Color.Honeydew;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF69B4.
         /// </summary>
-        public static readonly Rgba32 HotPink = NamedColors<Rgba32>.HotPink;
+        public static readonly Rgba32 HotPink = Color.HotPink;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #CD5C5C.
         /// </summary>
-        public static readonly Rgba32 IndianRed = NamedColors<Rgba32>.IndianRed;
+        public static readonly Rgba32 IndianRed = Color.IndianRed;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #4B0082.
         /// </summary>
-        public static readonly Rgba32 Indigo = NamedColors<Rgba32>.Indigo;
+        public static readonly Rgba32 Indigo = Color.Indigo;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFFF0.
         /// </summary>
-        public static readonly Rgba32 Ivory = NamedColors<Rgba32>.Ivory;
+        public static readonly Rgba32 Ivory = Color.Ivory;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F0E68C.
         /// </summary>
-        public static readonly Rgba32 Khaki = NamedColors<Rgba32>.Khaki;
+        public static readonly Rgba32 Khaki = Color.Khaki;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #E6E6FA.
         /// </summary>
-        public static readonly Rgba32 Lavender = NamedColors<Rgba32>.Lavender;
+        public static readonly Rgba32 Lavender = Color.Lavender;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFF0F5.
         /// </summary>
-        public static readonly Rgba32 LavenderBlush = NamedColors<Rgba32>.LavenderBlush;
+        public static readonly Rgba32 LavenderBlush = Color.LavenderBlush;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #7CFC00.
         /// </summary>
-        public static readonly Rgba32 LawnGreen = NamedColors<Rgba32>.LawnGreen;
+        public static readonly Rgba32 LawnGreen = Color.LawnGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFACD.
         /// </summary>
-        public static readonly Rgba32 LemonChiffon = NamedColors<Rgba32>.LemonChiffon;
+        public static readonly Rgba32 LemonChiffon = Color.LemonChiffon;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #ADD8E6.
         /// </summary>
-        public static readonly Rgba32 LightBlue = NamedColors<Rgba32>.LightBlue;
+        public static readonly Rgba32 LightBlue = Color.LightBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F08080.
         /// </summary>
-        public static readonly Rgba32 LightCoral = NamedColors<Rgba32>.LightCoral;
+        public static readonly Rgba32 LightCoral = Color.LightCoral;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #E0FFFF.
         /// </summary>
-        public static readonly Rgba32 LightCyan = NamedColors<Rgba32>.LightCyan;
+        public static readonly Rgba32 LightCyan = Color.LightCyan;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FAFAD2.
         /// </summary>
-        public static readonly Rgba32 LightGoldenrodYellow = NamedColors<Rgba32>.LightGoldenrodYellow;
+        public static readonly Rgba32 LightGoldenrodYellow = Color.LightGoldenrodYellow;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #D3D3D3.
         /// </summary>
-        public static readonly Rgba32 LightGray = NamedColors<Rgba32>.LightGray;
+        public static readonly Rgba32 LightGray = Color.LightGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #90EE90.
         /// </summary>
-        public static readonly Rgba32 LightGreen = NamedColors<Rgba32>.LightGreen;
+        public static readonly Rgba32 LightGreen = Color.LightGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFB6C1.
         /// </summary>
-        public static readonly Rgba32 LightPink = NamedColors<Rgba32>.LightPink;
+        public static readonly Rgba32 LightPink = Color.LightPink;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFA07A.
         /// </summary>
-        public static readonly Rgba32 LightSalmon = NamedColors<Rgba32>.LightSalmon;
+        public static readonly Rgba32 LightSalmon = Color.LightSalmon;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #20B2AA.
         /// </summary>
-        public static readonly Rgba32 LightSeaGreen = NamedColors<Rgba32>.LightSeaGreen;
+        public static readonly Rgba32 LightSeaGreen = Color.LightSeaGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #87CEFA.
         /// </summary>
-        public static readonly Rgba32 LightSkyBlue = NamedColors<Rgba32>.LightSkyBlue;
+        public static readonly Rgba32 LightSkyBlue = Color.LightSkyBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #778899.
         /// </summary>
-        public static readonly Rgba32 LightSlateGray = NamedColors<Rgba32>.LightSlateGray;
+        public static readonly Rgba32 LightSlateGray = Color.LightSlateGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #B0C4DE.
         /// </summary>
-        public static readonly Rgba32 LightSteelBlue = NamedColors<Rgba32>.LightSteelBlue;
+        public static readonly Rgba32 LightSteelBlue = Color.LightSteelBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFFE0.
         /// </summary>
-        public static readonly Rgba32 LightYellow = NamedColors<Rgba32>.LightYellow;
+        public static readonly Rgba32 LightYellow = Color.LightYellow;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00FF00.
         /// </summary>
-        public static readonly Rgba32 Lime = NamedColors<Rgba32>.Lime;
+        public static readonly Rgba32 Lime = Color.Lime;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #32CD32.
         /// </summary>
-        public static readonly Rgba32 LimeGreen = NamedColors<Rgba32>.LimeGreen;
+        public static readonly Rgba32 LimeGreen = Color.LimeGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FAF0E6.
         /// </summary>
-        public static readonly Rgba32 Linen = NamedColors<Rgba32>.Linen;
+        public static readonly Rgba32 Linen = Color.Linen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF00FF.
         /// </summary>
-        public static readonly Rgba32 Magenta = NamedColors<Rgba32>.Magenta;
+        public static readonly Rgba32 Magenta = Color.Magenta;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #800000.
         /// </summary>
-        public static readonly Rgba32 Maroon = NamedColors<Rgba32>.Maroon;
+        public static readonly Rgba32 Maroon = Color.Maroon;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #66CDAA.
         /// </summary>
-        public static readonly Rgba32 MediumAquamarine = NamedColors<Rgba32>.MediumAquamarine;
+        public static readonly Rgba32 MediumAquamarine = Color.MediumAquamarine;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #0000CD.
         /// </summary>
-        public static readonly Rgba32 MediumBlue = NamedColors<Rgba32>.MediumBlue;
+        public static readonly Rgba32 MediumBlue = Color.MediumBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #BA55D3.
         /// </summary>
-        public static readonly Rgba32 MediumOrchid = NamedColors<Rgba32>.MediumOrchid;
+        public static readonly Rgba32 MediumOrchid = Color.MediumOrchid;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #9370DB.
         /// </summary>
-        public static readonly Rgba32 MediumPurple = NamedColors<Rgba32>.MediumPurple;
+        public static readonly Rgba32 MediumPurple = Color.MediumPurple;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #3CB371.
         /// </summary>
-        public static readonly Rgba32 MediumSeaGreen = NamedColors<Rgba32>.MediumSeaGreen;
+        public static readonly Rgba32 MediumSeaGreen = Color.MediumSeaGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #7B68EE.
         /// </summary>
-        public static readonly Rgba32 MediumSlateBlue = NamedColors<Rgba32>.MediumSlateBlue;
+        public static readonly Rgba32 MediumSlateBlue = Color.MediumSlateBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00FA9A.
         /// </summary>
-        public static readonly Rgba32 MediumSpringGreen = NamedColors<Rgba32>.MediumSpringGreen;
+        public static readonly Rgba32 MediumSpringGreen = Color.MediumSpringGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #48D1CC.
         /// </summary>
-        public static readonly Rgba32 MediumTurquoise = NamedColors<Rgba32>.MediumTurquoise;
+        public static readonly Rgba32 MediumTurquoise = Color.MediumTurquoise;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #C71585.
         /// </summary>
-        public static readonly Rgba32 MediumVioletRed = NamedColors<Rgba32>.MediumVioletRed;
+        public static readonly Rgba32 MediumVioletRed = Color.MediumVioletRed;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #191970.
         /// </summary>
-        public static readonly Rgba32 MidnightBlue = NamedColors<Rgba32>.MidnightBlue;
+        public static readonly Rgba32 MidnightBlue = Color.MidnightBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F5FFFA.
         /// </summary>
-        public static readonly Rgba32 MintCream = NamedColors<Rgba32>.MintCream;
+        public static readonly Rgba32 MintCream = Color.MintCream;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFE4E1.
         /// </summary>
-        public static readonly Rgba32 MistyRose = NamedColors<Rgba32>.MistyRose;
+        public static readonly Rgba32 MistyRose = Color.MistyRose;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFE4B5.
         /// </summary>
-        public static readonly Rgba32 Moccasin = NamedColors<Rgba32>.Moccasin;
+        public static readonly Rgba32 Moccasin = Color.Moccasin;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFDEAD.
         /// </summary>
-        public static readonly Rgba32 NavajoWhite = NamedColors<Rgba32>.NavajoWhite;
+        public static readonly Rgba32 NavajoWhite = Color.NavajoWhite;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #000080.
         /// </summary>
-        public static readonly Rgba32 Navy = NamedColors<Rgba32>.Navy;
+        public static readonly Rgba32 Navy = Color.Navy;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FDF5E6.
         /// </summary>
-        public static readonly Rgba32 OldLace = NamedColors<Rgba32>.OldLace;
+        public static readonly Rgba32 OldLace = Color.OldLace;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #808000.
         /// </summary>
-        public static readonly Rgba32 Olive = NamedColors<Rgba32>.Olive;
+        public static readonly Rgba32 Olive = Color.Olive;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #6B8E23.
         /// </summary>
-        public static readonly Rgba32 OliveDrab = NamedColors<Rgba32>.OliveDrab;
+        public static readonly Rgba32 OliveDrab = Color.OliveDrab;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFA500.
         /// </summary>
-        public static readonly Rgba32 Orange = NamedColors<Rgba32>.Orange;
+        public static readonly Rgba32 Orange = Color.Orange;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF4500.
         /// </summary>
-        public static readonly Rgba32 OrangeRed = NamedColors<Rgba32>.OrangeRed;
+        public static readonly Rgba32 OrangeRed = Color.OrangeRed;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DA70D6.
         /// </summary>
-        public static readonly Rgba32 Orchid = NamedColors<Rgba32>.Orchid;
+        public static readonly Rgba32 Orchid = Color.Orchid;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #EEE8AA.
         /// </summary>
-        public static readonly Rgba32 PaleGoldenrod = NamedColors<Rgba32>.PaleGoldenrod;
+        public static readonly Rgba32 PaleGoldenrod = Color.PaleGoldenrod;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #98FB98.
         /// </summary>
-        public static readonly Rgba32 PaleGreen = NamedColors<Rgba32>.PaleGreen;
+        public static readonly Rgba32 PaleGreen = Color.PaleGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #AFEEEE.
         /// </summary>
-        public static readonly Rgba32 PaleTurquoise = NamedColors<Rgba32>.PaleTurquoise;
+        public static readonly Rgba32 PaleTurquoise = Color.PaleTurquoise;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DB7093.
         /// </summary>
-        public static readonly Rgba32 PaleVioletRed = NamedColors<Rgba32>.PaleVioletRed;
+        public static readonly Rgba32 PaleVioletRed = Color.PaleVioletRed;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFEFD5.
         /// </summary>
-        public static readonly Rgba32 PapayaWhip = NamedColors<Rgba32>.PapayaWhip;
+        public static readonly Rgba32 PapayaWhip = Color.PapayaWhip;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFDAB9.
         /// </summary>
-        public static readonly Rgba32 PeachPuff = NamedColors<Rgba32>.PeachPuff;
+        public static readonly Rgba32 PeachPuff = Color.PeachPuff;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #CD853F.
         /// </summary>
-        public static readonly Rgba32 Peru = NamedColors<Rgba32>.Peru;
+        public static readonly Rgba32 Peru = Color.Peru;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFC0CB.
         /// </summary>
-        public static readonly Rgba32 Pink = NamedColors<Rgba32>.Pink;
+        public static readonly Rgba32 Pink = Color.Pink;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #DDA0DD.
         /// </summary>
-        public static readonly Rgba32 Plum = NamedColors<Rgba32>.Plum;
+        public static readonly Rgba32 Plum = Color.Plum;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #B0E0E6.
         /// </summary>
-        public static readonly Rgba32 PowderBlue = NamedColors<Rgba32>.PowderBlue;
+        public static readonly Rgba32 PowderBlue = Color.PowderBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #800080.
         /// </summary>
-        public static readonly Rgba32 Purple = NamedColors<Rgba32>.Purple;
+        public static readonly Rgba32 Purple = Color.Purple;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #663399.
         /// </summary>
-        public static readonly Rgba32 RebeccaPurple = NamedColors<Rgba32>.RebeccaPurple;
+        public static readonly Rgba32 RebeccaPurple = Color.RebeccaPurple;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF0000.
         /// </summary>
-        public static readonly Rgba32 Red = NamedColors<Rgba32>.Red;
+        public static readonly Rgba32 Red = Color.Red;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #BC8F8F.
         /// </summary>
-        public static readonly Rgba32 RosyBrown = NamedColors<Rgba32>.RosyBrown;
+        public static readonly Rgba32 RosyBrown = Color.RosyBrown;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #4169E1.
         /// </summary>
-        public static readonly Rgba32 RoyalBlue = NamedColors<Rgba32>.RoyalBlue;
+        public static readonly Rgba32 RoyalBlue = Color.RoyalBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #8B4513.
         /// </summary>
-        public static readonly Rgba32 SaddleBrown = NamedColors<Rgba32>.SaddleBrown;
+        public static readonly Rgba32 SaddleBrown = Color.SaddleBrown;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FA8072.
         /// </summary>
-        public static readonly Rgba32 Salmon = NamedColors<Rgba32>.Salmon;
+        public static readonly Rgba32 Salmon = Color.Salmon;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F4A460.
         /// </summary>
-        public static readonly Rgba32 SandyBrown = NamedColors<Rgba32>.SandyBrown;
+        public static readonly Rgba32 SandyBrown = Color.SandyBrown;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #2E8B57.
         /// </summary>
-        public static readonly Rgba32 SeaGreen = NamedColors<Rgba32>.SeaGreen;
+        public static readonly Rgba32 SeaGreen = Color.SeaGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFF5EE.
         /// </summary>
-        public static readonly Rgba32 SeaShell = NamedColors<Rgba32>.SeaShell;
+        public static readonly Rgba32 SeaShell = Color.SeaShell;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #A0522D.
         /// </summary>
-        public static readonly Rgba32 Sienna = NamedColors<Rgba32>.Sienna;
+        public static readonly Rgba32 Sienna = Color.Sienna;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #C0C0C0.
         /// </summary>
-        public static readonly Rgba32 Silver = NamedColors<Rgba32>.Silver;
+        public static readonly Rgba32 Silver = Color.Silver;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #87CEEB.
         /// </summary>
-        public static readonly Rgba32 SkyBlue = NamedColors<Rgba32>.SkyBlue;
+        public static readonly Rgba32 SkyBlue = Color.SkyBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #6A5ACD.
         /// </summary>
-        public static readonly Rgba32 SlateBlue = NamedColors<Rgba32>.SlateBlue;
+        public static readonly Rgba32 SlateBlue = Color.SlateBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #708090.
         /// </summary>
-        public static readonly Rgba32 SlateGray = NamedColors<Rgba32>.SlateGray;
+        public static readonly Rgba32 SlateGray = Color.SlateGray;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFAFA.
         /// </summary>
-        public static readonly Rgba32 Snow = NamedColors<Rgba32>.Snow;
+        public static readonly Rgba32 Snow = Color.Snow;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #00FF7F.
         /// </summary>
-        public static readonly Rgba32 SpringGreen = NamedColors<Rgba32>.SpringGreen;
+        public static readonly Rgba32 SpringGreen = Color.SpringGreen;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #4682B4.
         /// </summary>
-        public static readonly Rgba32 SteelBlue = NamedColors<Rgba32>.SteelBlue;
+        public static readonly Rgba32 SteelBlue = Color.SteelBlue;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #D2B48C.
         /// </summary>
-        public static readonly Rgba32 Tan = NamedColors<Rgba32>.Tan;
+        public static readonly Rgba32 Tan = Color.Tan;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #008080.
         /// </summary>
-        public static readonly Rgba32 Teal = NamedColors<Rgba32>.Teal;
+        public static readonly Rgba32 Teal = Color.Teal;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #D8BFD8.
         /// </summary>
-        public static readonly Rgba32 Thistle = NamedColors<Rgba32>.Thistle;
+        public static readonly Rgba32 Thistle = Color.Thistle;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FF6347.
         /// </summary>
-        public static readonly Rgba32 Tomato = NamedColors<Rgba32>.Tomato;
+        public static readonly Rgba32 Tomato = Color.Tomato;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFFFF.
         /// </summary>
-        public static readonly Rgba32 Transparent = NamedColors<Rgba32>.Transparent;
+        public static readonly Rgba32 Transparent = Color.Transparent;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #40E0D0.
         /// </summary>
-        public static readonly Rgba32 Turquoise = NamedColors<Rgba32>.Turquoise;
+        public static readonly Rgba32 Turquoise = Color.Turquoise;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #EE82EE.
         /// </summary>
-        public static readonly Rgba32 Violet = NamedColors<Rgba32>.Violet;
+        public static readonly Rgba32 Violet = Color.Violet;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F5DEB3.
         /// </summary>
-        public static readonly Rgba32 Wheat = NamedColors<Rgba32>.Wheat;
+        public static readonly Rgba32 Wheat = Color.Wheat;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFFFF.
         /// </summary>
-        public static readonly Rgba32 White = NamedColors<Rgba32>.White;
+        public static readonly Rgba32 White = Color.White;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #F5F5F5.
         /// </summary>
-        public static readonly Rgba32 WhiteSmoke = NamedColors<Rgba32>.WhiteSmoke;
+        public static readonly Rgba32 WhiteSmoke = Color.WhiteSmoke;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #FFFF00.
         /// </summary>
-        public static readonly Rgba32 Yellow = NamedColors<Rgba32>.Yellow;
+        public static readonly Rgba32 Yellow = Color.Yellow;
 
         /// <summary>
         /// Represents a <see cref="Rgba32"/> matching the W3C definition that has an hex value of #9ACD32.
         /// </summary>
-        public static readonly Rgba32 YellowGreen = NamedColors<Rgba32>.YellowGreen;
+        public static readonly Rgba32 YellowGreen = Color.YellowGreen;
     }
 }
\ No newline at end of file

From 85147d26dceb3807b780060e4ef169b89b62cdbd Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Tue, 14 May 2019 00:06:17 +0200
Subject: [PATCH 192/223] Remove NamedColors<T> usages

---
 src/ImageSharp.Drawing/Processing/GradientBrushBase.cs        | 4 +++-
 .../Attributes/WithSolidFilledImagesAttribute.cs              | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs b/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
index 6e1e0086da..39dbcb61a5 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
@@ -49,6 +49,8 @@ namespace SixLabors.ImageSharp.Processing
         internal abstract class GradientBrushApplicatorBase<TPixel> : BrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
+            private static readonly TPixel Transparent = Color.Transparent.ToPixel<TPixel>();
+
             private readonly ColorStop[] colorStops;
 
             private readonly GradientRepetitionMode repetitionMode;
@@ -103,7 +105,7 @@ namespace SixLabors.ImageSharp.Processing
                         case GradientRepetitionMode.DontFill:
                             if (positionOnCompleteGradient > 1 || positionOnCompleteGradient < 0)
                             {
-                                return NamedColors<TPixel>.Transparent;
+                                return Transparent;
                             }
 
                             break;
diff --git a/tests/ImageSharp.Tests/TestUtilities/Attributes/WithSolidFilledImagesAttribute.cs b/tests/ImageSharp.Tests/TestUtilities/Attributes/WithSolidFilledImagesAttribute.cs
index f95db45f71..190e80fbad 100644
--- a/tests/ImageSharp.Tests/TestUtilities/Attributes/WithSolidFilledImagesAttribute.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/Attributes/WithSolidFilledImagesAttribute.cs
@@ -99,7 +99,7 @@ namespace SixLabors.ImageSharp.Tests
         /// </summary>
         /// <param name="width">The width of the requested image</param>
         /// <param name="height">The height of the requested image</param>
-        /// <param name="colorName">The referenced color name (name of property in <see cref="NamedColors{TPixel}")/></param>
+        /// <param name="colorName">The referenced color name (name of property in <see cref="Color"/>).</param>
         /// <param name="pixelTypes">The requested pixel types</param>
         /// <param name="additionalParameters">Additional theory parameter values</param>
         public WithSolidFilledImagesAttribute(
@@ -119,7 +119,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <param name="memberData">The member data to apply to theories</param>
         /// <param name="width">The width of the requested image</param>
         /// <param name="height">The height of the requested image</param>
-        /// <param name="colorName">The referenced color name (name of property in <see cref="NamedColors{TPixel}")/></param>
+        /// <param name="colorName">The referenced color name (name of property in <see cref="Color"/>).</param>
         /// <param name="pixelTypes">The requested pixel types</param>
         /// <param name="additionalParameters">Additional theory parameter values</param>
         public WithSolidFilledImagesAttribute(

From 028b6b5b7ef046dedc4bb2b5c6be36aaf531591e Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Wed, 15 May 2019 21:15:17 +0200
Subject: [PATCH 193/223] Not using quantization for Grey8 images when encoding
 8Bit Bitmaps

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  | 83 ++++++++++++++-----
 .../Formats/Bmp/BmpEncoderTests.cs            |  6 +-
 2 files changed, 62 insertions(+), 27 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index edde7dc893..532d20e000 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -305,37 +305,74 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private void Write8Bit<TPixel>(Stream stream, ImageFrame<TPixel> image)
             where TPixel : struct, IPixel<TPixel>
         {
+            bool isGray8 = typeof(TPixel) == typeof(Gray8);
             using (IMemoryOwner<byte> colorPaletteBuffer = this.memoryAllocator.AllocateManagedByteBuffer(ColorPaletteSize8Bit, AllocationOptions.Clean))
-            using (IQuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
             {
                 Span<byte> colorPalette = colorPaletteBuffer.GetSpan();
-                int idx = 0;
-                var color = default(Rgba32);
-                ReadOnlySpan<TPixel> paletteSpan = quantized.Palette.Span;
-
-                // TODO: Use bulk conversion here for better perf
-                foreach (TPixel quantizedColor in paletteSpan)
+                if (isGray8)
                 {
-                    quantizedColor.ToRgba32(ref color);
-                    colorPalette[idx] = color.B;
-                    colorPalette[idx + 1] = color.G;
-                    colorPalette[idx + 2] = color.R;
-
-                    // Padding byte, always 0
-                    colorPalette[idx + 3] = 0;
-                    idx += 4;
-                }
+                    for (byte i = 0; i <= 255; i++)
+                    {
+                        int idx = i * 4;
+                        colorPalette[idx] = i;
+                        colorPalette[idx + 1] = i;
+                        colorPalette[idx + 2] = i;
 
-                stream.Write(colorPalette);
+                        // Padding byte, always 0
+                        colorPalette[idx + 3] = 0;
+                    }
 
-                for (int y = image.Height - 1; y >= 0; y--)
-                {
-                    ReadOnlySpan<byte> pixelSpan = quantized.GetRowSpan(y);
-                    stream.Write(pixelSpan);
+                    stream.Write(colorPalette);
 
-                    for (int i = 0; i < this.padding; i++)
+                    using (IMemoryOwner<byte> rowSpanBuffer = this.memoryAllocator.AllocateManagedByteBuffer(image.Width, AllocationOptions.Clean))
+                    {
+                        Span<byte> outputPixelRow = rowSpanBuffer.GetSpan();
+                        for (int y = image.Height - 1; y >= 0; y--)
+                        {
+                            Span<TPixel> inputPixelRow = image.GetPixelRowSpan(y);
+                            PixelOperations<TPixel>.Instance.ToGray8Bytes(this.configuration, inputPixelRow, outputPixelRow, image.Width);
+                            stream.Write(outputPixelRow);
+
+                            for (int i = 0; i < this.padding; i++)
+                            {
+                                stream.WriteByte(0);
+                            }
+                        }
+                    }
+                }
+                else
+                {
+                    using (IQuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
                     {
-                        stream.WriteByte(0);
+                        ReadOnlySpan<TPixel> quantizedColors = quantized.Palette.Span;
+                        var color = default(Rgba32);
+
+                        // TODO: Use bulk conversion here for better perf
+                        int idx = 0;
+                        foreach (TPixel quantizedColor in quantizedColors)
+                        {
+                            quantizedColor.ToRgba32(ref color);
+                            colorPalette[idx] = color.B;
+                            colorPalette[idx + 1] = color.G;
+                            colorPalette[idx + 2] = color.R;
+
+                            // Padding byte, always 0
+                            colorPalette[idx + 3] = 0;
+                            idx += 4;
+                        }
+
+                        stream.Write(colorPalette);
+
+                        for (int y = image.Height - 1; y >= 0; y--)
+                        {
+                            ReadOnlySpan<byte> pixelSpan = quantized.GetRowSpan(y);
+                            stream.Write(pixelSpan);
+
+                            for (int i = 0; i < this.padding; i++)
+                            {
+                                stream.WriteByte(0);
+                            }
+                        }
                     }
                 }
             }
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index dd76e9443c..162d3f30b9 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -169,8 +169,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             TestBmpEncoderCore(
                 provider,
                 bitsPerPixel,
-                supportTransparency: false,
-                ImageComparer.TolerantPercentage(0.01f));
+                supportTransparency: false);
 
         [Theory]
         [WithFile(Bit8Gs, PixelTypes.Gray8, BmpBitsPerPixel.Pixel8)]
@@ -179,8 +178,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             TestBmpEncoderCore(
                 provider,
                 bitsPerPixel,
-                supportTransparency: true,
-                ImageComparer.TolerantPercentage(0.01f));
+                supportTransparency: true);
 
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]

From e8b29a2e98ecb2e4db78f77f9cd007d2d60c11c3 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Thu, 16 May 2019 20:08:16 +0200
Subject: [PATCH 194/223] Refactor Write8Bit into two methods: one for gray and
 one for color

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs | 140 ++++++++++++-------
 1 file changed, 86 insertions(+), 54 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 532d20e000..e9600f640d 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -311,68 +311,100 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 Span<byte> colorPalette = colorPaletteBuffer.GetSpan();
                 if (isGray8)
                 {
-                    for (byte i = 0; i <= 255; i++)
-                    {
-                        int idx = i * 4;
-                        colorPalette[idx] = i;
-                        colorPalette[idx + 1] = i;
-                        colorPalette[idx + 2] = i;
+                    this.Write8BitGray(stream, image, colorPalette);
+                }
+                else
+                {
+                    this.Write8BitColor(stream, image, colorPalette);
+                }
+            }
+        }
 
-                        // Padding byte, always 0
-                        colorPalette[idx + 3] = 0;
-                    }
+        /// <summary>
+        /// Writes an 8 Bit color image with a color palette. The color palette has 256 entry's with 4 bytes for each entry.
+        /// </summary>
+        /// <typeparam name="TPixel">The type of the pixel.</typeparam>
+        /// <param name="stream">The <see cref="Stream"/> to write to.</param>
+        /// <param name="image"> The <see cref="ImageFrame{TPixel}"/> containing pixel data.</param>
+        /// <param name="colorPalette">A byte span of size 1024 for the color palette.</param>
+        private void Write8BitColor<TPixel>(Stream stream, ImageFrame<TPixel> image, Span<byte> colorPalette)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (IQuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
+            {
+                ReadOnlySpan<TPixel> quantizedColors = quantized.Palette.Span;
+                var color = default(Rgba32);
 
-                    stream.Write(colorPalette);
+                // TODO: Use bulk conversion here for better perf
+                int idx = 0;
+                foreach (TPixel quantizedColor in quantizedColors)
+                {
+                    quantizedColor.ToRgba32(ref color);
+                    colorPalette[idx] = color.B;
+                    colorPalette[idx + 1] = color.G;
+                    colorPalette[idx + 2] = color.R;
+
+                    // Padding byte, always 0.
+                    colorPalette[idx + 3] = 0;
+                    idx += 4;
+                }
 
-                    using (IMemoryOwner<byte> rowSpanBuffer = this.memoryAllocator.AllocateManagedByteBuffer(image.Width, AllocationOptions.Clean))
+                stream.Write(colorPalette);
+
+                for (int y = image.Height - 1; y >= 0; y--)
+                {
+                    ReadOnlySpan<byte> pixelSpan = quantized.GetRowSpan(y);
+                    stream.Write(pixelSpan);
+
+                    for (int i = 0; i < this.padding; i++)
                     {
-                        Span<byte> outputPixelRow = rowSpanBuffer.GetSpan();
-                        for (int y = image.Height - 1; y >= 0; y--)
-                        {
-                            Span<TPixel> inputPixelRow = image.GetPixelRowSpan(y);
-                            PixelOperations<TPixel>.Instance.ToGray8Bytes(this.configuration, inputPixelRow, outputPixelRow, image.Width);
-                            stream.Write(outputPixelRow);
-
-                            for (int i = 0; i < this.padding; i++)
-                            {
-                                stream.WriteByte(0);
-                            }
-                        }
+                        stream.WriteByte(0);
                     }
                 }
-                else
+            }
+        }
+
+        /// <summary>
+        /// Writes an 8 Bit gray image with a color palette. The color palette has 256 entry's with 4 bytes for each entry.
+        /// </summary>
+        /// <typeparam name="TPixel">The type of the pixel.</typeparam>
+        /// <param name="stream">The <see cref="Stream"/> to write to.</param>
+        /// <param name="image"> The <see cref="ImageFrame{TPixel}"/> containing pixel data.</param>
+        /// <param name="colorPalette">A byte span of size 1024 for the color palette.</param>
+        private void Write8BitGray<TPixel>(Stream stream, ImageFrame<TPixel> image, Span<byte> colorPalette)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            // Create a color palette with 256 different gray values.
+            for (int i = 0; i <= 255; i++)
+            {
+                int idx = i * 4;
+                byte grayValue = (byte)i;
+                colorPalette[idx] = grayValue;
+                colorPalette[idx + 1] = grayValue;
+                colorPalette[idx + 2] = grayValue;
+
+                // Padding byte, always 0.
+                colorPalette[idx + 3] = 0;
+            }
+
+            stream.Write(colorPalette);
+
+            using (IMemoryOwner<byte> rowSpanBuffer = this.memoryAllocator.AllocateManagedByteBuffer(image.Width, AllocationOptions.Clean))
+            {
+                Span<byte> outputPixelRow = rowSpanBuffer.GetSpan();
+                for (int y = image.Height - 1; y >= 0; y--)
                 {
-                    using (IQuantizedFrame<TPixel> quantized = this.quantizer.CreateFrameQuantizer<TPixel>(this.configuration, 256).QuantizeFrame(image))
+                    Span<TPixel> inputPixelRow = image.GetPixelRowSpan(y);
+                    PixelOperations<TPixel>.Instance.ToGray8Bytes(
+                        this.configuration,
+                        inputPixelRow,
+                        outputPixelRow,
+                        image.Width);
+                    stream.Write(outputPixelRow);
+
+                    for (int i = 0; i < this.padding; i++)
                     {
-                        ReadOnlySpan<TPixel> quantizedColors = quantized.Palette.Span;
-                        var color = default(Rgba32);
-
-                        // TODO: Use bulk conversion here for better perf
-                        int idx = 0;
-                        foreach (TPixel quantizedColor in quantizedColors)
-                        {
-                            quantizedColor.ToRgba32(ref color);
-                            colorPalette[idx] = color.B;
-                            colorPalette[idx + 1] = color.G;
-                            colorPalette[idx + 2] = color.R;
-
-                            // Padding byte, always 0
-                            colorPalette[idx + 3] = 0;
-                            idx += 4;
-                        }
-
-                        stream.Write(colorPalette);
-
-                        for (int y = image.Height - 1; y >= 0; y--)
-                        {
-                            ReadOnlySpan<byte> pixelSpan = quantized.GetRowSpan(y);
-                            stream.Write(pixelSpan);
-
-                            for (int i = 0; i < this.padding; i++)
-                            {
-                                stream.WriteByte(0);
-                            }
-                        }
+                        stream.WriteByte(0);
                     }
                 }
             }

From 9ea9f2df5d7ded528b342b62d3dcd42e6dfdaf1f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Thu, 16 May 2019 23:38:28 +0200
Subject: [PATCH 195/223] drop unnecessary generic
 IImageProcessorContext<TPixel> usages

---
 .../Extensions/ProcessingExtensions.cs        | 14 ++--
 .../ImageSharp.Benchmarks/Drawing/DrawText.cs | 10 ++-
 .../Drawing/DrawTextOutline.cs                |  5 +-
 .../ImageSharp.Benchmarks/Samplers/Resize.cs  | 10 +--
 tests/ImageSharp.Tests/ImageOperationTests.cs | 39 ++++++-----
 .../Basic1ParameterConvolutionTests.cs        |  6 +-
 .../Processors/Convolution/BoxBlurTest.cs     |  4 +-
 .../Convolution/GaussianBlurTest.cs           |  4 +-
 .../Convolution/GaussianSharpenTest.cs        |  4 +-
 .../Processors/Transforms/ResizeTests.cs      |  6 +-
 .../ImageProviders/TestImageProvider.cs       |  2 +-
 .../TestUtilities/TestImageExtensions.cs      | 69 ++++++++++---------
 .../TestUtilities/TestUtils.cs                | 14 ++--
 13 files changed, 99 insertions(+), 88 deletions(-)

diff --git a/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs b/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
index c72e8cfb77..e469af18b8 100644
--- a/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
+++ b/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to mutate.</param>
         /// <param name="operation">The operation to perform on the source.</param>
-        public static void Mutate<TPixel>(this Image<TPixel> source, Action<IImageProcessingContext<TPixel>> operation)
+        public static void Mutate<TPixel>(this Image<TPixel> source, Action<IImageProcessingContext> operation)
             where TPixel : struct, IPixel<TPixel>
         {
             Guard.NotNull(operation, nameof(operation));
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image to mutate.</param>
         /// <param name="operations">The operations to perform on the source.</param>
-        public static void Mutate<TPixel>(this Image<TPixel> source, params IImageProcessor<TPixel>[] operations)
+        public static void Mutate<TPixel>(this Image<TPixel> source, params IImageProcessor[] operations)
             where TPixel : struct, IPixel<TPixel>
         {
             Guard.NotNull(operations, nameof(operations));
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to clone.</param>
         /// <param name="operation">The operation to perform on the clone.</param>
         /// <returns>The new <see cref="SixLabors.ImageSharp.Image{TPixel}"/></returns>
-        public static Image<TPixel> Clone<TPixel>(this Image<TPixel> source, Action<IImageProcessingContext<TPixel>> operation)
+        public static Image<TPixel> Clone<TPixel>(this Image<TPixel> source, Action<IImageProcessingContext> operation)
             where TPixel : struct, IPixel<TPixel>
         {
             Guard.NotNull(operation, nameof(operation));
@@ -108,7 +108,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image to clone.</param>
         /// <param name="operations">The operations to perform on the clone.</param>
         /// <returns>The new <see cref="SixLabors.ImageSharp.Image{TPixel}"/></returns>
-        public static Image<TPixel> Clone<TPixel>(this Image<TPixel> source, params IImageProcessor<TPixel>[] operations)
+        public static Image<TPixel> Clone<TPixel>(this Image<TPixel> source, params IImageProcessor[] operations)
             where TPixel : struct, IPixel<TPixel>
         {
             Guard.NotNull(operations, nameof(operations));
@@ -122,14 +122,12 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Applies the given <see cref="IImageProcessor{TPixel}"/> collection against the context
         /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="source">The image processing context.</param>
         /// <param name="operations">The operations to perform on the source.</param>
         /// <returns>The <see cref="IImageProcessor{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> ApplyProcessors<TPixel>(this IImageProcessingContext<TPixel> source, params IImageProcessor<TPixel>[] operations)
-            where TPixel : struct, IPixel<TPixel>
+        public static IImageProcessingContext ApplyProcessors(this IImageProcessingContext source, params IImageProcessor[] operations)
         {
-            foreach (IImageProcessor<TPixel> p in operations)
+            foreach (IImageProcessor p in operations)
             {
                 source = source.ApplyProcessor(p);
             }
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
index 28f410e7d1..0982db3340 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawText.cs
@@ -55,8 +55,14 @@ namespace SixLabors.ImageSharp.Benchmarks
                 image.Mutate(x => DrawTextOldVersion(x, new TextGraphicsOptions(true) { WrapTextWidth = 780 }, TextToRender, font, Processing.Brushes.Solid(Rgba32.HotPink), null, new SixLabors.Primitives.PointF(10, 10)));
             }
 
-            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(IImageProcessingContext<TPixel> source, TextGraphicsOptions options, string text, SixLabors.Fonts.Font font, IBrush brush, IPen pen, SixLabors.Primitives.PointF location)
-                where TPixel : struct, IPixel<TPixel>
+            IImageProcessingContext DrawTextOldVersion(
+                IImageProcessingContext source,
+                TextGraphicsOptions options,
+                string text,
+                SixLabors.Fonts.Font font,
+                IBrush brush,
+                IPen pen,
+                SixLabors.Primitives.PointF location)
             {
                 float dpiX = 72;
                 float dpiY = 72;
diff --git a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
index 658590e2d4..c5c1ba5ac1 100644
--- a/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
+++ b/tests/ImageSharp.Benchmarks/Drawing/DrawTextOutline.cs
@@ -64,15 +64,14 @@ namespace SixLabors.ImageSharp.Benchmarks
                         new SixLabors.Primitives.PointF(10, 10)));
             }
 
-            IImageProcessingContext<TPixel> DrawTextOldVersion<TPixel>(
-                IImageProcessingContext<TPixel> source,
+            IImageProcessingContext DrawTextOldVersion(
+                IImageProcessingContext source,
                 TextGraphicsOptions options,
                 string text,
                 SixLabors.Fonts.Font font,
                 IBrush brush,
                 IPen pen,
                 SixLabors.Primitives.PointF location)
-                where TPixel : struct, IPixel<TPixel>
             {
                 var style = new SixLabors.Fonts.RendererOptions(font, options.DpiX, options.DpiY, location)
                 {
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
index cf47202cc8..172e243729 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Resize.cs
@@ -91,12 +91,12 @@ namespace SixLabors.ImageSharp.Benchmarks
             }
         }
 
-        protected abstract void ExecuteResizeOperation(IImageProcessingContext<TPixel> ctx);
+        protected abstract void ExecuteResizeOperation(IImageProcessingContext ctx);
     }
 
     public class Resize_Bicubic_Rgba32 : ResizeBenchmarkBase<Rgba32>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext ctx)
         {
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
@@ -143,7 +143,7 @@ namespace SixLabors.ImageSharp.Benchmarks
 
     public class Resize_Bicubic_Bgra32 : ResizeBenchmarkBase<Bgra32>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Bgra32> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext ctx)
         {
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
@@ -171,7 +171,7 @@ namespace SixLabors.ImageSharp.Benchmarks
 
     public class Resize_Bicubic_Rgb24 : ResizeBenchmarkBase<Rgb24>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgb24> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext ctx)
         {
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic);
         }
@@ -198,7 +198,7 @@ namespace SixLabors.ImageSharp.Benchmarks
 
     public class Resize_BicubicCompand_Rgba32 : ResizeBenchmarkBase<Rgba32>
     {
-        protected override void ExecuteResizeOperation(IImageProcessingContext<Rgba32> ctx)
+        protected override void ExecuteResizeOperation(IImageProcessingContext ctx)
         {
             ctx.Resize(this.DestSize, this.DestSize, KnownResamplers.Bicubic, true);
         }
diff --git a/tests/ImageSharp.Tests/ImageOperationTests.cs b/tests/ImageSharp.Tests/ImageOperationTests.cs
index e694f0b644..b99ad64b24 100644
--- a/tests/ImageSharp.Tests/ImageOperationTests.cs
+++ b/tests/ImageSharp.Tests/ImageOperationTests.cs
@@ -21,14 +21,21 @@ namespace SixLabors.ImageSharp.Tests
     {
         private readonly Image<Rgba32> image;
         private readonly FakeImageOperationsProvider provider;
-        private readonly IImageProcessor<Rgba32> processor;
+        private readonly IImageProcessor<Rgba32> processorImplementation;
+
+        private readonly IImageProcessor processorDefinition;
 
         public Configuration Configuration { get; private set; }
 
         public ImageOperationTests()
         {
             this.provider = new FakeImageOperationsProvider();
-            this.processor = new Mock<IImageProcessor<Rgba32>>().Object;
+            this.processorImplementation = new Mock<IImageProcessor<Rgba32>>().Object;
+            
+            Mock<IImageProcessor> processorMock = new Mock<IImageProcessor>();
+            processorMock.Setup(p => p.CreatePixelSpecificProcessor<Rgba32>()).Returns(this.processorImplementation);
+            this.processorDefinition = processorMock.Object;
+            
             this.image = new Image<Rgba32>(new Configuration()
             {
                 ImageOperationsProvider = this.provider
@@ -38,61 +45,61 @@ namespace SixLabors.ImageSharp.Tests
         [Fact]
         public void MutateCallsImageOperationsProvider_Func_OriginalImage()
         {
-            this.image.Mutate(x => x.ApplyProcessor(this.processor));
+            this.image.Mutate(x => x.ApplyProcessor(this.processorDefinition));
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void MutateCallsImageOperationsProvider_ListOfProcessors_OriginalImage()
         {
-            this.image.Mutate(this.processor);
+            this.image.Mutate(this.processorDefinition);
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void CloneCallsImageOperationsProvider_Func_WithDuplicateImage()
         {
-            Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processor));
+            Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processorDefinition));
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
+            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void CloneCallsImageOperationsProvider_ListOfProcessors_WithDuplicateImage()
         {
-            Image<Rgba32> returned = this.image.Clone(this.processor);
+            Image<Rgba32> returned = this.image.Clone(this.processorDefinition);
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processor, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
+            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void CloneCallsImageOperationsProvider_Func_NotOnOrigional()
         {
-            Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processor));
+            Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processorDefinition));
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.DoesNotContain(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void CloneCallsImageOperationsProvider_ListOfProcessors_NotOnOrigional()
         {
-            Image<Rgba32> returned = this.image.Clone(this.processor);
+            Image<Rgba32> returned = this.image.Clone(this.processorDefinition);
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processor, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.DoesNotContain(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
         }
 
         [Fact]
         public void ApplyProcessors_ListOfProcessors_AppliesAllProcessorsToOperation()
         {
             var operations = new FakeImageOperationsProvider.FakeImageOperations<Rgba32>(null, false);
-            operations.ApplyProcessors(this.processor);
-            Assert.Contains(this.processor, operations.Applied.Select(x => x.GenericProcessor));
+            operations.ApplyProcessors(this.processorDefinition);
+            Assert.Contains(this.processorImplementation, operations.Applied.Select(x => x.GenericProcessor));
         }
 
         public void Dispose() => this.image.Dispose();
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
index 1f939a281b..0a10d0755f 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/Basic1ParameterConvolutionTests.cs
@@ -47,10 +47,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
                 ValidatorComparer);
         }
 
-        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value)
-            where TPixel : struct, IPixel<TPixel>;
+        protected abstract void Apply(IImageProcessingContext ctx, int value);
         
-        protected abstract void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds)
-            where TPixel : struct, IPixel<TPixel>;
+        protected abstract void Apply(IImageProcessingContext ctx, int value, Rectangle bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
index 923f9d6161..a7cf9360cf 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/BoxBlurTest.cs
@@ -9,9 +9,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
     [GroupOutput("Convolution")]
     public class BoxBlurTest : Basic1ParameterConvolutionTests
     {
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.BoxBlur(value);
+        protected override void Apply(IImageProcessingContext ctx, int value) => ctx.BoxBlur(value);
 
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+        protected override void Apply(IImageProcessingContext ctx, int value, Rectangle bounds) =>
             ctx.BoxBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
index 6307a1c51d..68eb8c4f63 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianBlurTest.cs
@@ -13,9 +13,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
     [GroupOutput("Convolution")]
     public class GaussianBlurTest : Basic1ParameterConvolutionTests
     {
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianBlur(value);
+        protected override void Apply(IImageProcessingContext ctx, int value) => ctx.GaussianBlur(value);
 
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+        protected override void Apply(IImageProcessingContext ctx, int value, Rectangle bounds) =>
             ctx.GaussianBlur(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
index 29a1643b0c..4b497309ee 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Convolution/GaussianSharpenTest.cs
@@ -12,9 +12,9 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Convolution
     [GroupOutput("Convolution")]
     public class GaussianSharpenTest : Basic1ParameterConvolutionTests
     {
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value) => ctx.GaussianSharpen(value);
+        protected override void Apply(IImageProcessingContext ctx, int value) => ctx.GaussianSharpen(value);
 
-        protected override void Apply<TPixel>(IImageProcessingContext<TPixel> ctx, int value, Rectangle bounds) =>
+        protected override void Apply(IImageProcessingContext ctx, int value, Rectangle bounds) =>
             ctx.GaussianSharpen(value, bounds);
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
index 9bf9079d41..8ae298c51e 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/ResizeTests.cs
@@ -322,11 +322,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                         }
 
                         FormattableString testOutputDetails = $"{samplerName}-{destSizeInfo}";
-                        ctx.Apply(
-                            img => img.DebugSave(
-                                provider,
-                                $"{testOutputDetails}-ORIGINAL",
-                                appendPixelTypeToFileName: false));
+
                         ctx.Resize((Size)newSize, sampler, false);
                         return testOutputDetails;
                     },
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
index 15fab9b2bf..8d493c7d43 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestImageProvider.cs
@@ -104,7 +104,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <summary>
         /// Returns an <see cref="Image{TPixel}"/> instance to the test case with the necessary traits.
         /// </summary>
-        public Image<TPixel> GetImage(Action<IImageProcessingContext<TPixel>> operationsToApply)
+        public Image<TPixel> GetImage(Action<IImageProcessingContext> operationsToApply)
         {
             Image<TPixel> img = this.GetImage();
             img.Mutate(operationsToApply);
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
index e77b1974d3..8de3a347ba 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs
@@ -9,10 +9,13 @@ using System.Numerics;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.ParallelUtils;
 using SixLabors.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+using SixLabors.Primitives;
 
 using Xunit;
 
@@ -21,39 +24,11 @@ namespace SixLabors.ImageSharp.Tests
     public static class TestImageExtensions
     {
         /// <summary>
-        /// TODO: This should be a common processing method! The image.Opacity(val) multiplies the alpha channel!
+        /// TODO: Consider adding this private processor to the library
         /// </summary>
-        /// <typeparam name="TPixel"></typeparam>
         /// <param name="ctx"></param>
-        public static void MakeOpaque<TPixel>(this IImageProcessingContext<TPixel> ctx)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            MemoryAllocator memoryAllocator = ctx.MemoryAllocator;
-
-            ctx.Apply(
-                img =>
-                    {
-                        Configuration configuration = img.GetConfiguration();
-                        using (Buffer2D<Vector4> temp = memoryAllocator.Allocate2D<Vector4>(img.Width, img.Height))
-                        {
-                            Span<Vector4> tempSpan = temp.GetSpan();
-                            foreach (ImageFrame<TPixel> frame in img.Frames)
-                            {
-                                Span<TPixel> pixelSpan = frame.GetPixelSpan();
-
-                                PixelOperations<TPixel>.Instance.ToVector4(configuration, pixelSpan, tempSpan, PixelConversionModifiers.Scale);
-
-                                for (int i = 0; i < tempSpan.Length; i++)
-                                {
-                                    ref Vector4 v = ref tempSpan[i];
-                                    v.W = 1F;
-                                }
-
-                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempSpan, pixelSpan, PixelConversionModifiers.Scale);
-                            }
-                        }
-                    });
-        }
+        public static void MakeOpaque(this IImageProcessingContext ctx) =>
+            ctx.ApplyProcessor(new MakeOpaqueProcessor());
 
         public static void DebugSave(
             this Image image,
@@ -702,5 +677,37 @@ namespace SixLabors.ImageSharp.Tests
             return image;
         }
 
+        private class MakeOpaqueProcessor : IImageProcessor
+        {
+            public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>()
+                where TPixel : struct, IPixel<TPixel>
+            {
+                return new MakeOpaqueProcessor<TPixel>();
+            }
+        }
+
+        private class MakeOpaqueProcessor<TPixel> : ImageProcessor<TPixel>
+            where TPixel : struct, IPixel<TPixel>
+        {
+            protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
+            {
+                ParallelHelper.IterateRowsWithTempBuffer<Vector4>(sourceRectangle, configuration,
+                    (rows, temp) =>
+                        {
+                            Span<Vector4> tempSpan = temp.Span;
+                            for (int y = rows.Min; y < rows.Max; y++)
+                            {
+                                var rowSpan = source.GetPixelRowSpan(y).Slice(sourceRectangle.Left, sourceRectangle.Width);
+                                PixelOperations<TPixel>.Instance.ToVector4(configuration, rowSpan, tempSpan, PixelConversionModifiers.Scale);
+                                for (int i = 0; i < tempSpan.Length; i++)
+                                {
+                                    ref Vector4 v = ref tempSpan[i];
+                                    v.W = 1F;
+                                }
+                                PixelOperations<TPixel>.Instance.FromVector4Destructive(configuration, tempSpan, rowSpan, PixelConversionModifiers.Scale);
+                            }
+                        });
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
index 5db0c08282..b56ce05171 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
@@ -165,7 +165,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <param name="appendSourceFileOrDescription"></param>
         internal static void RunValidatingProcessorTest<TPixel>(
             this TestImageProvider<TPixel> provider,
-            Action<IImageProcessingContext<TPixel>> process,
+            Action<IImageProcessingContext> process,
             object testOutputDetails = null,
             ImageComparer comparer = null,
             bool appendPixelTypeToFileName = true,
@@ -202,7 +202,7 @@ namespace SixLabors.ImageSharp.Tests
 
         internal static void RunValidatingProcessorTest<TPixel>(
             this TestImageProvider<TPixel> provider,
-            Func<IImageProcessingContext<TPixel>, FormattableString> processAndGetTestOutputDetails,
+            Func<IImageProcessingContext, FormattableString> processAndGetTestOutputDetails,
             ImageComparer comparer = null,
             bool appendPixelTypeToFileName = true,
             bool appendSourceFileOrDescription = true)
@@ -241,7 +241,7 @@ namespace SixLabors.ImageSharp.Tests
 
         public static void RunValidatingProcessorTestOnWrappedMemoryImage<TPixel>(
             this TestImageProvider<TPixel> provider,
-            Action<IImageProcessingContext<TPixel>> process,
+            Action<IImageProcessingContext> process,
             object testOutputDetails = null,
             ImageComparer comparer = null,
             string useReferenceOutputFrom = null,
@@ -291,11 +291,11 @@ namespace SixLabors.ImageSharp.Tests
         }
 
         /// <summary>
-        /// Same as <see cref="RunValidatingProcessorTest{TPixel}"/> but with an additional <see cref="Rectangle"/> parameter passed to 'process'
+        /// Same as 'RunValidatingProcessorTest{TPixel}' but with an additional <see cref="Rectangle"/> parameter passed to 'process'
         /// </summary>
         internal static void RunRectangleConstrainedValidatingProcessorTest<TPixel>(
             this TestImageProvider<TPixel> provider,
-            Action<IImageProcessingContext<TPixel>, Rectangle> process,
+            Action<IImageProcessingContext, Rectangle> process,
             object testOutputDetails = null,
             ImageComparer comparer = null)
             where TPixel : struct, IPixel<TPixel>
@@ -315,11 +315,11 @@ namespace SixLabors.ImageSharp.Tests
         }
 
         /// <summary>
-        /// Same as <see cref="RunValidatingProcessorTest{TPixel}"/> but without the 'CompareToReferenceOutput()' step.
+        /// Same as 'RunValidatingProcessorTest{TPixel}' but without the 'CompareToReferenceOutput()' step.
         /// </summary>
         internal static void RunProcessorTest<TPixel>(
             this TestImageProvider<TPixel> provider,
-            Action<IImageProcessingContext<TPixel>> process,
+            Action<IImageProcessingContext> process,
             object testOutputDetails = null)
             where TPixel : struct, IPixel<TPixel>
         {

From 01182219512325a36edb5eddc1ab9201cacb050f Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 17 May 2019 00:06:37 +0200
Subject: [PATCH 196/223] drop almost all usages of FileTestBase

---
 .../Binarization/BinaryDitherTests.cs         | 19 ++++++++++---------
 .../Binarization/BinaryThresholdTest.cs       | 15 +++++++++++----
 .../Processors/Transforms/PadTest.cs          |  9 +++++++--
 .../Processors/Transforms/RotateFlipTests.cs  |  6 +++---
 4 files changed, 31 insertions(+), 18 deletions(-)

diff --git a/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryDitherTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryDitherTests.cs
index 44fdfc7039..d3507ed4c4 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryDitherTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryDitherTests.cs
@@ -12,7 +12,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
 {
-    public class BinaryDitherTests : FileTestBase
+    public class BinaryDitherTests
     {
         public static readonly string[] CommonTestImages =
             {
@@ -40,14 +40,15 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
             { "Stucki", KnownDiffusers.Stucki },
         };
 
+        public const PixelTypes TestPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.Rgb24;
 
         private static IOrderedDither DefaultDitherer => KnownDitherers.BayerDither4x4;
 
         private static IErrorDiffuser DefaultErrorDiffuser => KnownDiffusers.Atkinson;
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), nameof(OrderedDitherers), DefaultPixelType)]
-        [WithTestPatternImages(nameof(OrderedDitherers), 100, 100, DefaultPixelType)]
+        [WithFileCollection(nameof(CommonTestImages), nameof(OrderedDitherers), PixelTypes.Rgba32)]
+        [WithTestPatternImages(nameof(OrderedDitherers), 100, 100, PixelTypes.Rgba32)]
         public void BinaryDitherFilter_WorksWithAllDitherers<TPixel>(TestImageProvider<TPixel> provider, string name, IOrderedDither ditherer)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -59,8 +60,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFileCollection(nameof(CommonTestImages), nameof(ErrorDiffusers), DefaultPixelType)]
-        [WithTestPatternImages(nameof(ErrorDiffusers), 100, 100, DefaultPixelType)]
+        [WithFileCollection(nameof(CommonTestImages), nameof(ErrorDiffusers), PixelTypes.Rgba32)]
+        [WithTestPatternImages(nameof(ErrorDiffusers), 100, 100, PixelTypes.Rgba32)]
         public void DiffusionFilter_WorksWithAllErrorDiffusers<TPixel>(TestImageProvider<TPixel> provider, string name, IErrorDiffuser diffuser)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -72,7 +73,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFile(TestImages.Png.Bike, CommonNonDefaultPixelTypes)]
+        [WithFile(TestImages.Png.Bike, TestPixelTypes)]
         public void BinaryDitherFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -84,7 +85,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFile(TestImages.Png.Bike, CommonNonDefaultPixelTypes)]
+        [WithFile(TestImages.Png.Bike, TestPixelTypes)]
         public void DiffusionFilter_ShouldNotDependOnSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -96,7 +97,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFile(TestImages.Png.CalliphoraPartial, DefaultPixelType)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]
         public void ApplyDitherFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -113,7 +114,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFile(TestImages.Png.CalliphoraPartial, DefaultPixelType)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32)]
         public void ApplyDiffusionFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryThresholdTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryThresholdTest.cs
index 988c9125ba..4ae5d60513 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryThresholdTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Binarization/BinaryThresholdTest.cs
@@ -11,17 +11,24 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
 {
     using SixLabors.ImageSharp.Processing;
 
-    public class BinaryThresholdTest : FileTestBase
+    public class BinaryThresholdTest
     {
         public static readonly TheoryData<float> BinaryThresholdValues
-        = new TheoryData<float>
+            = new TheoryData<float>
         {
             .25F,
             .75F
         };
+        
+        public static readonly string[] CommonTestImages =
+            {
+                TestImages.Png.CalliphoraPartial, TestImages.Png.Bike
+            };
+        
+        public const PixelTypes TestPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.Rgb24;
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BinaryThresholdValues), DefaultPixelType)]
+        [WithFileCollection(nameof(CommonTestImages), nameof(BinaryThresholdValues), PixelTypes.Rgba32)]
         public void ImageShouldApplyBinaryThresholdFilter<TPixel>(TestImageProvider<TPixel> provider, float value)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -33,7 +40,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Binarization
         }
 
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), nameof(BinaryThresholdValues), DefaultPixelType)]
+        [WithFileCollection(nameof(CommonTestImages), nameof(BinaryThresholdValues), PixelTypes.Rgba32)]
         public void ImageShouldApplyBinaryThresholdInBox<TPixel>(TestImageProvider<TPixel> provider, float value)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
index 6cce62d14e..750d67c32a 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
@@ -7,10 +7,15 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
-    public class PadTest : FileTestBase
+    public class PadTest
     {
+        public static readonly string[] CommonTestImages =
+            {
+                TestImages.Png.CalliphoraPartial, TestImages.Png.Bike
+            };
+        
         [Theory]
-        [WithFileCollection(nameof(DefaultFiles), DefaultPixelType)]
+        [WithFileCollection(nameof(CommonTestImages), PixelTypes.Rgba32)]
         public void ImageShouldPad<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/RotateFlipTests.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/RotateFlipTests.cs
index d6376b1792..20e12cb7f9 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/RotateFlipTests.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/RotateFlipTests.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
     using SixLabors.ImageSharp.Processing;
 
-    public class RotateFlipTests : FileTestBase
+    public class RotateFlipTests
     {
         public static readonly string[] FlipFiles = { TestImages.Bmp.F };
 
@@ -24,8 +24,8 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         };
 
         [Theory]
-        [WithTestPatternImages(nameof(RotateFlipValues), 100, 50, DefaultPixelType)]
-        [WithTestPatternImages(nameof(RotateFlipValues), 50, 100, DefaultPixelType)]
+        [WithTestPatternImages(nameof(RotateFlipValues), 100, 50, PixelTypes.Rgba32)]
+        [WithTestPatternImages(nameof(RotateFlipValues), 50, 100, PixelTypes.Rgba32)]
         public void RotateFlip<TPixel>(TestImageProvider<TPixel> provider, RotateMode rotateType, FlipMode flipType)
             where TPixel : struct, IPixel<TPixel>
         {

From 25d2c35b7c5931e8c754429c8e28e3099b0aec74 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 17 May 2019 00:29:06 +0200
Subject: [PATCH 197/223] fix tests

---
 .../Drawing/DrawImageTests.cs                 |  5 ++-
 tests/ImageSharp.Tests/ImageOperationTests.cs | 34 +++++++++++--------
 tests/ImageSharp.Tests/Issues/Issue412.cs     |  3 +-
 3 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index cb44651d6f..52821cf478 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -112,7 +112,10 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 image.Mutate(c => c.DrawImage(brushImage, 0.5f));
 
                 image.DebugSave(provider, appendSourceFileOrDescription: false);
-                image.CompareToReferenceOutput(provider, appendSourceFileOrDescription: false);
+                image.CompareToReferenceOutput(
+                    ImageComparer.TolerantPercentage(0.01f),
+                    provider,
+                    appendSourceFileOrDescription: false);
             }
         }
 
diff --git a/tests/ImageSharp.Tests/ImageOperationTests.cs b/tests/ImageSharp.Tests/ImageOperationTests.cs
index b99ad64b24..30371f0008 100644
--- a/tests/ImageSharp.Tests/ImageOperationTests.cs
+++ b/tests/ImageSharp.Tests/ImageOperationTests.cs
@@ -21,19 +21,13 @@ namespace SixLabors.ImageSharp.Tests
     {
         private readonly Image<Rgba32> image;
         private readonly FakeImageOperationsProvider provider;
-        private readonly IImageProcessor<Rgba32> processorImplementation;
-
         private readonly IImageProcessor processorDefinition;
 
-        public Configuration Configuration { get; private set; }
-
         public ImageOperationTests()
         {
             this.provider = new FakeImageOperationsProvider();
-            this.processorImplementation = new Mock<IImageProcessor<Rgba32>>().Object;
-            
+
             Mock<IImageProcessor> processorMock = new Mock<IImageProcessor>();
-            processorMock.Setup(p => p.CreatePixelSpecificProcessor<Rgba32>()).Returns(this.processorImplementation);
             this.processorDefinition = processorMock.Object;
             
             this.image = new Image<Rgba32>(new Configuration()
@@ -48,7 +42,9 @@ namespace SixLabors.ImageSharp.Tests
             this.image.Mutate(x => x.ApplyProcessor(this.processorDefinition));
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.Contains(
+                this.processorDefinition,
+                this.provider.AppliedOperations(this.image).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -57,7 +53,9 @@ namespace SixLabors.ImageSharp.Tests
             this.image.Mutate(this.processorDefinition);
 
             Assert.True(this.provider.HasCreated(this.image));
-            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.Contains(
+                this.processorDefinition,
+                this.provider.AppliedOperations(this.image).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -66,7 +64,9 @@ namespace SixLabors.ImageSharp.Tests
             Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processorDefinition));
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
+            Assert.Contains(
+                this.processorDefinition,
+                this.provider.AppliedOperations(returned).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -75,7 +75,9 @@ namespace SixLabors.ImageSharp.Tests
             Image<Rgba32> returned = this.image.Clone(this.processorDefinition);
 
             Assert.True(this.provider.HasCreated(returned));
-            Assert.Contains(this.processorImplementation, this.provider.AppliedOperations(returned).Select(x => x.GenericProcessor));
+            Assert.Contains(
+                this.processorDefinition,
+                this.provider.AppliedOperations(returned).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -83,7 +85,9 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> returned = this.image.Clone(x => x.ApplyProcessor(this.processorDefinition));
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.DoesNotContain(
+                this.processorDefinition,
+                this.provider.AppliedOperations(this.image).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -91,7 +95,9 @@ namespace SixLabors.ImageSharp.Tests
         {
             Image<Rgba32> returned = this.image.Clone(this.processorDefinition);
             Assert.False(this.provider.HasCreated(this.image));
-            Assert.DoesNotContain(this.processorImplementation, this.provider.AppliedOperations(this.image).Select(x => x.GenericProcessor));
+            Assert.DoesNotContain(
+                this.processorDefinition,
+                this.provider.AppliedOperations(this.image).Select(x => x.NonGenericProcessor));
         }
 
         [Fact]
@@ -99,7 +105,7 @@ namespace SixLabors.ImageSharp.Tests
         {
             var operations = new FakeImageOperationsProvider.FakeImageOperations<Rgba32>(null, false);
             operations.ApplyProcessors(this.processorDefinition);
-            Assert.Contains(this.processorImplementation, operations.Applied.Select(x => x.GenericProcessor));
+            Assert.Contains(this.processorDefinition, operations.Applied.Select(x => x.NonGenericProcessor));
         }
 
         public void Dispose() => this.image.Dispose();
diff --git a/tests/ImageSharp.Tests/Issues/Issue412.cs b/tests/ImageSharp.Tests/Issues/Issue412.cs
index f22d3a85cf..7b2cfd81c6 100644
--- a/tests/ImageSharp.Tests/Issues/Issue412.cs
+++ b/tests/ImageSharp.Tests/Issues/Issue412.cs
@@ -46,8 +46,9 @@ namespace SixLabors.ImageSharp.Tests.Issues
                 {
                     for (var x = 0; x < 40; x++)
                     {
+                        TPixel red = Color.Red.ToPixel<TPixel>();
 
-                        Assert.True(Color.Red.Equals(image[x, y]), $"expected {Color.Red} but found {image[x, y]} at [{x}, {y}]");
+                        Assert.True(red.Equals(image[x, y]), $"expected {Color.Red} but found {image[x, y]} at [{x}, {y}]");
                     }
                 }
             }

From 3589820cd69b0dd6aa96aece9ba43ad0328afdaa Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 17 May 2019 01:01:20 +0200
Subject: [PATCH 198/223] re-enable target frameworks

---
 src/ImageSharp.Drawing/ImageSharp.Drawing.csproj | 3 +--
 src/ImageSharp/ImageSharp.csproj                 | 3 +--
 tests/ImageSharp.Tests/ImageSharp.Tests.csproj   | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index 722ef33ff0..f9181b45da 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -11,8 +11,7 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>-->
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
     
     <LangVersion>7.3</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 1b213c26dc..832a6ce3f9 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -11,8 +11,7 @@
     <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
     <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
 
-    <!--<TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>-->
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
       
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index efdf89964c..0b727f30ce 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!--<TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
     <DebugType Condition="$(codecov) != ''">full</DebugType>

From 824496f72d6279c279b9aa196eaac238eca6aa90 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 18 May 2019 11:44:47 +0200
Subject: [PATCH 199/223] Add tests for quantization of 32 bit bitmap to 8 bit
 color image

---
 .../Formats/Bmp/BmpEncoderTests.cs            | 44 +++++++++++++++++++
 tests/Images/External                         |  2 +-
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 162d3f30b9..36bd2bbdb3 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -3,10 +3,12 @@
 
 using System.IO;
 
+using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Metadata;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
 using Xunit;
@@ -180,6 +182,48 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 bitsPerPixel,
                 supportTransparency: true);
 
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
+        public void Encode_8BitColor_WithWuQuantizer<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var encoder = new BmpEncoder
+                                  {
+                                    BitsPerPixel = BmpBitsPerPixel.Pixel8,
+                                    Quantizer = new WuQuantizer(256)
+                                  };
+                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
+                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
+                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
+                {
+                    referenceImage.CompareToReferenceOutput(ImageComparer.Exact, provider, extension: "bmp", appendPixelTypeToFileName: false);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
+        public void Encode_8BitColor_WithOctreeQuantizer<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var encoder = new BmpEncoder
+                                  {
+                                      BitsPerPixel = BmpBitsPerPixel.Pixel8,
+                                      Quantizer = new OctreeQuantizer(256)
+                                  };
+                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
+                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
+                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
+                {
+                    referenceImage.CompareToReferenceOutput(ImageComparer.Exact, provider, extension: "bmp", appendPixelTypeToFileName: false);
+                }
+            }
+        }
+
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         [WithFile(Bit32Rgba, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
diff --git a/tests/Images/External b/tests/Images/External
index c057090b44..42b3b980ed 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit c057090b4402120a83a8efe251aa5b691db9c0dc
+Subproject commit 42b3b980ed07afd7b6603a5bfa6ffb91d6c8a124

From 467a91bfe0504be2f81a1f4d8d82084c052dacfc Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 18 May 2019 12:07:47 +0200
Subject: [PATCH 200/223] Renamed DrawImageTest to DrawImageTests, fixed
 namespace

---
 .../Drawing/{DrawImageTest.cs => DrawImageTests.cs}           | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 rename tests/ImageSharp.Tests/Drawing/{DrawImageTest.cs => DrawImageTests.cs} (99%)

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
similarity index 99%
rename from tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
rename to tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index 54b04390ec..0d0a821251 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTest.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -8,10 +8,10 @@ using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using SixLabors.Primitives;
 using Xunit;
 
-namespace SixLabors.ImageSharp.Tests
+namespace SixLabors.ImageSharp.Tests.Drawing
 {
     [GroupOutput("Drawing")]
-    public class DrawImageTest : FileTestBase
+    public class DrawImageTests : FileTestBase
     {
         private const PixelTypes PixelTypes = Tests.PixelTypes.Rgba32;
 

From 305b99ee8856d77bb4743510b611b4514ab3bc7d Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 18 May 2019 12:49:35 +0200
Subject: [PATCH 201/223] Using tolerant comparer for the Encode_8BitColor
 tests

---
 tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 36bd2bbdb3..f4c3154daf 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -198,7 +198,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
                 using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
                 {
-                    referenceImage.CompareToReferenceOutput(ImageComparer.Exact, provider, extension: "bmp", appendPixelTypeToFileName: false);
+                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
                 }
             }
         }
@@ -219,7 +219,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
                 using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
                 {
-                    referenceImage.CompareToReferenceOutput(ImageComparer.Exact, provider, extension: "bmp", appendPixelTypeToFileName: false);
+                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
                 }
             }
         }

From 13412336922b1372a4bbdd1f864a07b4f9446091 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sat, 18 May 2019 19:06:44 +0200
Subject: [PATCH 202/223] Removed the Encode_8BitColor, because of the
 quantization differences with net472 and netcore

---
 .../Formats/Bmp/BmpEncoderTests.cs            | 42 -------------------
 1 file changed, 42 deletions(-)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index f4c3154daf..9208de694d 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -182,48 +182,6 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 bitsPerPixel,
                 supportTransparency: true);
 
-        [Theory]
-        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
-        public void Encode_8BitColor_WithWuQuantizer<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                var encoder = new BmpEncoder
-                                  {
-                                    BitsPerPixel = BmpBitsPerPixel.Pixel8,
-                                    Quantizer = new WuQuantizer(256)
-                                  };
-                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
-                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
-                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
-                {
-                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
-                }
-            }
-        }
-
-        [Theory]
-        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
-        public void Encode_8BitColor_WithOctreeQuantizer<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            {
-                var encoder = new BmpEncoder
-                                  {
-                                      BitsPerPixel = BmpBitsPerPixel.Pixel8,
-                                      Quantizer = new OctreeQuantizer(256)
-                                  };
-                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
-                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
-                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
-                {
-                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
-                }
-            }
-        }
-
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         [WithFile(Bit32Rgba, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]

From 71a27f27b9f40f29de5ffbe0848de3256a528cdc Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sun, 19 May 2019 18:34:07 +0200
Subject: [PATCH 203/223] Re-enabled Encode_8BitColor tests, if its 64 bit
 process

---
 .../Formats/Bmp/BmpEncoderTests.cs            | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 9208de694d..178e652ae7 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -182,6 +182,58 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 bitsPerPixel,
                 supportTransparency: true);
 
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
+        public void Encode_8BitColor_WithWuQuantizer<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            if (!TestEnvironment.Is64BitProcess)
+            {
+                return;
+            }
+
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var encoder = new BmpEncoder
+                {
+                    BitsPerPixel = BmpBitsPerPixel.Pixel8,
+                    Quantizer = new WuQuantizer(256)
+                };
+                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
+                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
+                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
+                {
+                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
+        public void Encode_8BitColor_WithOctreeQuantizer<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            if (!TestEnvironment.Is64BitProcess)
+            {
+                return;
+            }
+
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                var encoder = new BmpEncoder
+                {
+                    BitsPerPixel = BmpBitsPerPixel.Pixel8,
+                    Quantizer = new OctreeQuantizer(256)
+                };
+                string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "bmp", encoder, appendPixelTypeToFileName: false);
+                IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
+                using (var referenceImage = Image.Load<TPixel>(actualOutputFile, referenceDecoder))
+                {
+                    referenceImage.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f), provider, extension: "bmp", appendPixelTypeToFileName: false);
+                }
+            }
+        }
+
         [Theory]
         [WithFile(TestImages.Png.GrayAlpha2BitInterlaced, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]
         [WithFile(Bit32Rgba, PixelTypes.Rgba32, BmpBitsPerPixel.Pixel32)]

From b51d127bd27b665fb9beea9dede3a9ec44e1e96e Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sun, 19 May 2019 20:56:20 +0200
Subject: [PATCH 204/223] Using MemoryMarshal.AsBytes in Write8BitGray to get
 the bytes of a row

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs | 23 +++++++-------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index e9600f640d..9fbd0b5adb 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Buffers;
 using System.IO;
+using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Common.Helpers;
@@ -389,23 +390,15 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
             stream.Write(colorPalette);
 
-            using (IMemoryOwner<byte> rowSpanBuffer = this.memoryAllocator.AllocateManagedByteBuffer(image.Width, AllocationOptions.Clean))
+            for (int y = image.Height - 1; y >= 0; y--)
             {
-                Span<byte> outputPixelRow = rowSpanBuffer.GetSpan();
-                for (int y = image.Height - 1; y >= 0; y--)
-                {
-                    Span<TPixel> inputPixelRow = image.GetPixelRowSpan(y);
-                    PixelOperations<TPixel>.Instance.ToGray8Bytes(
-                        this.configuration,
-                        inputPixelRow,
-                        outputPixelRow,
-                        image.Width);
-                    stream.Write(outputPixelRow);
+                ReadOnlySpan<TPixel> inputPixelRow = image.GetPixelRowSpan(y);
+                ReadOnlySpan<byte> outputPixelRow = MemoryMarshal.AsBytes(inputPixelRow);
+                stream.Write(outputPixelRow);
 
-                    for (int i = 0; i < this.padding; i++)
-                    {
-                        stream.WriteByte(0);
-                    }
+                for (int i = 0; i < this.padding; i++)
+                {
+                    stream.WriteByte(0);
                 }
             }
         }

From d03eaa24f9af30ed2468f3adfbebe590a9859ff5 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sun, 19 May 2019 21:28:39 +0200
Subject: [PATCH 205/223] Fix merge mistake: Using DrawImageTests from current
 master branch

---
 .../Drawing/DrawImageTests.cs                 | 228 +++++++++---------
 1 file changed, 116 insertions(+), 112 deletions(-)

diff --git a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
index 0d0a821251..b2d499c7fa 100644
--- a/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
+++ b/tests/ImageSharp.Tests/Drawing/DrawImageTests.cs
@@ -2,58 +2,37 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using SixLabors.Primitives;
+using SixLabors.Shapes;
+
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Drawing
 {
     [GroupOutput("Drawing")]
-    public class DrawImageTests : FileTestBase
+    public class DrawImageTests
     {
-        private const PixelTypes PixelTypes = Tests.PixelTypes.Rgba32;
-
-        public static readonly string[] TestFiles = {
-               TestImages.Jpeg.Baseline.Calliphora,
-               TestImages.Bmp.Car,
-               TestImages.Png.Splash,
-               TestImages.Gif.Rings
-        };
-
-        [Theory]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Normal)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Multiply)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Add)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Subtract)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Screen)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Darken)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Lighten)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Overlay)]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.HardLight)]
-        public void ImageShouldApplyDrawImage<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> image = provider.GetImage())
-            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
+        public static readonly TheoryData<PixelColorBlendingMode> BlendingModes = new TheoryData<PixelColorBlendingMode>
             {
-                blend.Mutate(x => x.Resize(image.Width / 2, image.Height / 2));
-                image.Mutate(x => x.DrawImage(blend, new Point(image.Width / 4, image.Height / 4), mode, .75f));
-                image.DebugSave(provider, new { mode });
-            }
-        }
+                PixelColorBlendingMode.Normal,
+                PixelColorBlendingMode.Multiply,
+                PixelColorBlendingMode.Add,
+                PixelColorBlendingMode.Subtract,
+                PixelColorBlendingMode.Screen,
+                PixelColorBlendingMode.Darken,
+                PixelColorBlendingMode.Lighten,
+                PixelColorBlendingMode.Overlay,
+                PixelColorBlendingMode.HardLight,
+            };
 
         [Theory]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Normal)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Multiply)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Add)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Subtract)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Screen)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Darken)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Lighten)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.Overlay)]
-        [WithFile(TestImages.Png.Rainbow, PixelTypes, PixelColorBlendingMode.HardLight)]
+        [WithFile(TestImages.Png.Rainbow, nameof(BlendingModes), PixelTypes.Rgba32)]
         public void ImageBlendingMatchesSvgSpecExamples<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -61,96 +40,139 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             using (var source = Image.Load<TPixel>(TestFile.Create(TestImages.Png.Ducky).Bytes))
             {
                 background.Mutate(x => x.DrawImage(source, mode, 1F));
-                VerifyImage(provider, mode, background);
+                background.DebugSave(
+                    provider,
+                    new { mode = mode },
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
+
+                var comparer = ImageComparer.TolerantPercentage(0.01F);
+                background.CompareToReferenceOutput(comparer,
+                    provider,
+                    new { mode = mode },
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
             }
         }
 
         [Theory]
-        [WithFileCollection(nameof(TestFiles), PixelTypes, PixelColorBlendingMode.Normal)]
-        public void ImageShouldDrawTransformedImage<TPixel>(TestImageProvider<TPixel> provider, PixelColorBlendingMode mode)
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Bgr24, TestImages.Png.Bike, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.75f)]
+        [WithFile(TestImages.Png.CalliphoraPartial, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.25f)]
+
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Multiply, 0.5f)]
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Add, 0.5f)]
+        [WithTestPatternImages(400, 400, PixelTypes.Rgba32, TestImages.Png.Splash, PixelColorBlendingMode.Subtract, 0.5f)]
+
+        [WithFile(TestImages.Png.Rgb48Bpp, PixelTypes.Rgba64, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 1f)]
+        [WithFile(TestImages.Png.Rgb48Bpp, PixelTypes.Rgba64, TestImages.Png.Splash, PixelColorBlendingMode.Normal, 0.25f)]
+        public void WorksWithDifferentConfigurations<TPixel>(
+            TestImageProvider<TPixel> provider,
+            string brushImage,
+            PixelColorBlendingMode mode,
+            float opacity)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage())
-            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
+            using (var blend = Image.Load<TPixel>(TestFile.Create(brushImage).Bytes))
             {
-                AffineTransformBuilder builder = new AffineTransformBuilder()
-                    .AppendRotationDegrees(45F)
-                    .AppendScale(new SizeF(.25F, .25F))
-                    .AppendTranslation(new PointF(10, 10));
+                Size size = new Size(image.Width * 3 / 4, image.Height * 3 / 4);
+                Point position = new Point(image.Width / 8, image.Height / 8);
+                blend.Mutate(x => x.Resize(size.Width, size.Height, KnownResamplers.Bicubic));
+                image.Mutate(x => x.DrawImage(blend, position, mode, opacity));
+                FormattableString testInfo = $"{System.IO.Path.GetFileNameWithoutExtension(brushImage)}-{mode}-{opacity}";
 
-                // Apply a background color so we can see the translation.
-                blend.Mutate(x => x.Transform(builder));
-                blend.Mutate(x => x.BackgroundColor(Color.HotPink));
+                PngEncoder encoder = new PngEncoder();
 
-                // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
-                var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
-                image.Mutate(x => x.DrawImage(blend, position, mode, .75F));
-                image.DebugSave(provider, new[] { "Transformed" });
+                if (provider.PixelType == PixelTypes.Rgba64)
+                {
+                    encoder.BitDepth = PngBitDepth.Bit16;
+                }
+
+                image.DebugSave(provider, testInfo, encoder: encoder);
+                image.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.01f),
+                    provider,
+                    testInfo);
             }
         }
 
         [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandleNegativeLocation(TestImageProvider<Rgba32> provider)
+        [WithTestPatternImages(200, 200, PixelTypes.Rgba32 | PixelTypes.Bgra32)]
+        public void DrawImageOfDifferentPixelType<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(50, 50))
-            {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = -25;
-                Rgba32 backgroundPixel = background[0, 0];
-                Rgba32 overlayPixel = overlay[Math.Abs(xy) + 1, Math.Abs(xy) + 1];
+            byte[] brushData = TestFile.Create(TestImages.Png.Ducky).Bytes;
 
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
-
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[0, 0]);
+            using (Image<TPixel> image = provider.GetImage())
+            using (Image brushImage = provider.PixelType == PixelTypes.Rgba32
+                                          ? (Image)Image.Load<Bgra32>(brushData)
+                                          : Image.Load<Rgba32>(brushData))
+            {
+                image.Mutate(c => c.DrawImage(brushImage, 0.5f));
 
-                background.DebugSave(provider, testOutputDetails: "Negative");
+                image.DebugSave(provider, appendSourceFileOrDescription: false);
+                image.CompareToReferenceOutput(
+                    ImageComparer.TolerantPercentage(0.01f),
+                    provider,
+                    appendSourceFileOrDescription: false);
             }
         }
 
         [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandlePositiveLocation(TestImageProvider<Rgba32> provider)
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 0, 0)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 25, 25)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, 75, 50)]
+        [WithSolidFilledImages(100, 100, "White", PixelTypes.Rgba32, -25, -30)]
+        public void WorksWithDifferentLocations(TestImageProvider<Rgba32> provider, int x, int y)
         {
             using (Image<Rgba32> background = provider.GetImage())
             using (var overlay = new Image<Rgba32>(50, 50))
             {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = 25;
-                Rgba32 backgroundPixel = background[xy - 1, xy - 1];
-                Rgba32 overlayPixel = overlay[0, 0];
+                overlay.Mutate(c => c.Fill(Rgba32.Black));
 
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
+                background.Mutate(c => c.DrawImage(overlay, new Point(x, y), PixelColorBlendingMode.Normal, 1F));
 
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[xy, xy]);
+                background.DebugSave(
+                    provider,
+                    testOutputDetails: $"{x}_{y}",
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
 
-                background.DebugSave(provider, testOutputDetails: "Positive");
+                background.CompareToReferenceOutput(
+                    provider,
+                    testOutputDetails: $"{x}_{y}",
+                    appendPixelTypeToFileName: false,
+                    appendSourceFileOrDescription: false);
             }
         }
+
         [Theory]
-        [WithSolidFilledImages(100, 100, 255, 255, 255, PixelTypes.Rgba32)]
-        public void ImageShouldHandlePositiveLocationTruncatedOverlay(TestImageProvider<Rgba32> provider)
+        [WithFile(TestImages.Png.Splash, PixelTypes.Rgba32)]
+        public void DrawTransformed<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<Rgba32> background = provider.GetImage())
-            using (var overlay = new Image<Rgba32>(50, 50))
+            using (Image<TPixel> image = provider.GetImage())
+            using (var blend = Image.Load<TPixel>(TestFile.Create(TestImages.Bmp.Car).Bytes))
             {
-                overlay.Mutate(x => x.Fill(Rgba32.Black));
-
-                const int xy = 75;
-                Rgba32 backgroundPixel = background[xy - 1, xy - 1];
-                Rgba32 overlayPixel = overlay[0, 0];
+                AffineTransformBuilder builder = new AffineTransformBuilder()
+                    .AppendRotationDegrees(45F)
+                    .AppendScale(new SizeF(.25F, .25F))
+                    .AppendTranslation(new PointF(10, 10));
 
-                background.Mutate(x => x.DrawImage(overlay, new Point(xy, xy), PixelColorBlendingMode.Normal, 1F));
+                // Apply a background color so we can see the translation.
+                blend.Mutate(x => x.Transform(builder));
+                blend.Mutate(x => x.BackgroundColor(Color.HotPink));
 
-                Assert.Equal(Rgba32.White, backgroundPixel);
-                Assert.Equal(overlayPixel, background[xy, xy]);
+                // Lets center the matrix so we can tell whether any cut-off issues we may have belong to the drawing processor
+                var position = new Point((image.Width - blend.Width) / 2, (image.Height - blend.Height) / 2);
+                image.Mutate(x => x.DrawImage(blend, position, .75F));
 
-                background.DebugSave(provider, testOutputDetails: "PositiveTruncated");
+                image.DebugSave(provider, appendSourceFileOrDescription: false, appendPixelTypeToFileName: false);
+                image.CompareToReferenceOutput(ImageComparer.TolerantPercentage(0.002f),
+                    provider,
+                    appendSourceFileOrDescription: false,
+                    appendPixelTypeToFileName: false);
             }
         }
 
@@ -175,24 +197,6 @@ namespace SixLabors.ImageSharp.Tests.Drawing
             }
         }
 
-        private static void VerifyImage<TPixel>(
-            TestImageProvider<TPixel> provider,
-            PixelColorBlendingMode mode,
-            Image<TPixel> img)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            img.DebugSave(
-                provider,
-                new { mode },
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-
-            var comparer = ImageComparer.TolerantPercentage(0.01F, 3);
-            img.CompareFirstFrameToReferenceOutput(comparer,
-                provider,
-                new { mode },
-                appendPixelTypeToFileName: false,
-                appendSourceFileOrDescription: false);
-        }
+
     }
 }
\ No newline at end of file

From 34781bff3eeded66e99acd91d99f40bb079ef9a8 Mon Sep 17 00:00:00 2001
From: Anton Firsov <antonfir@gmail.com>
Date: Thu, 23 May 2019 13:00:48 +0200
Subject: [PATCH 206/223] API cleanup (related to #907) (#911)

* temporarily disable target frameworks

* drop DelegateProcessor

* drop IImageProcessingContext<TPixel>

* drop NamedColors<T>

* drop ColorBuilder<T>

* drop the *Base postfix for clean class hierarchies

* re-enable target frameworks

* use MathF in gradient brushes

* Move PngFilterMethod to the correct namespace.
---
 .../Processing/EllipticGradientBrush.cs       |  11 +-
 ...{GradientBrushBase.cs => GradientBrush.cs} |  10 +-
 .../Processing/LinearGradientBrush.cs         |   8 +-
 .../Processing/RadialGradientBrush.cs         |   8 +-
 src/ImageSharp/Color/Color.cs                 |  48 +-
 .../Conversion/ColorSpaceConverter.CieXyz.cs  |   2 +-
 .../Conversion/ColorSpaceConverter.cs         |   2 +-
 .../Conversion/ColorSpaceConverterOptions.cs  |   2 +-
 .../Converters/CieXyzToLinearRgbConverter.cs  |   4 +-
 .../LinearRgbAndCieXyzConverterBase.cs        |   2 +-
 .../Converters/LinearRgbToCieXyzConverter.cs  |   4 +-
 .../RGBPrimariesChromaticityCoordinates.cs    |   2 +-
 .../WorkingSpaces/GammaWorkingSpace.cs        |   2 +-
 .../WorkingSpaces/LWorkingSpace.cs            |   2 +-
 .../WorkingSpaces/Rec2020WorkingSpace.cs      |   2 +-
 .../WorkingSpaces/Rec709WorkingSpace.cs       |   2 +-
 ...WorkingSpaceBase.cs => RgbWorkingSpace.cs} |  10 +-
 .../WorkingSpaces/SRgbWorkingSpace.cs         |   2 +-
 src/ImageSharp/ColorSpaces/LinearRgb.cs       |  10 +-
 src/ImageSharp/ColorSpaces/Rgb.cs             |  10 +-
 .../ColorSpaces/RgbWorkingSpaces.cs           |  38 +-
 .../Formats/{ => Png}/PngFilterMethod.cs      |   2 +-
 .../PixelFormats/ColorBuilder{TPixel}.cs      | 104 ---
 .../PixelFormats/NamedColors{TPixel}.cs       | 761 ------------------
 .../PixelImplementations/Rgba32.cs            |  55 +-
 .../PixelImplementations/RgbaVector.cs        |   2 +-
 ...ext.cs => DefaultImageProcessorContext.cs} |  14 +-
 .../Extensions/BinaryDiffuseExtensions.cs     |   8 +-
 .../Extensions/BinaryDitherExtensions.cs      |   8 +-
 .../Extensions/ProcessingExtensions.cs        |  37 +-
 .../IImageProcessingContextFactory.cs         |   2 +-
 .../IImageProcessingContext{TPixel}.cs        |  46 --
 .../IInternalImageProcessingContext.cs        |  22 +
 .../Processors/DelegateProcessor.cs           |  43 -
 .../Processors/Dithering/AtkinsonDiffuser.cs  |   2 +-
 .../Processors/Dithering/BurksDiffuser.cs     |   2 +-
 ...{ErrorDiffuserBase.cs => ErrorDiffuser.cs} |   6 +-
 .../Dithering/FloydSteinbergDiffuser.cs       |   2 +-
 .../Dithering/JarvisJudiceNinkeDiffuser.cs    |   2 +-
 .../Processors/Dithering/Sierra2Diffuser.cs   |   2 +-
 .../Processors/Dithering/Sierra3Diffuser.cs   |   2 +-
 .../Dithering/SierraLiteDiffuser.cs           |   2 +-
 .../Dithering/StevensonArceDiffuser.cs        |   2 +-
 .../Processors/Dithering/StuckiDiffuser.cs    |   2 +-
 .../AffineTransformProcessor{TPixel}.cs       |   2 +-
 .../Transforms/CropProcessor{TPixel}.cs       |   2 +-
 .../ProjectiveTransformProcessor{TPixel}.cs   |   2 +-
 .../Resize/ResizeProcessor{TPixel}.cs         |   2 +-
 ...ProcessorBase.cs => TransformProcessor.cs} |   2 +-
 tests/ImageSharp.Benchmarks/Samplers/Glow.cs  |   2 +-
 .../BaseImageOperationsExtensionTest.cs       |   2 +-
 .../ApproximateColorspaceComparer.cs          |   6 +-
 .../FakeImageOperationsProvider.cs            |  21 +-
 .../Image/ImageProcessingContextTests.cs      |  60 --
 .../Image/ImageTests.WrapMemory.cs            |   8 +-
 .../PixelFormats/ColorBuilderTests.cs         |  40 -
 .../PixelFormats/ColorDefinitionTests.cs      |  46 --
 .../Processing/DelegateTest.cs                |  25 -
 .../BasicTestPatternProvider.cs               |  10 +-
 .../ImageProviders/TestPatternProvider.cs     |  31 +-
 60 files changed, 223 insertions(+), 1347 deletions(-)
 rename src/ImageSharp.Drawing/Processing/{GradientBrushBase.cs => GradientBrush.cs} (96%)
 rename src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/{RgbWorkingSpaceBase.cs => RgbWorkingSpace.cs} (91%)
 rename src/ImageSharp/Formats/{ => Png}/PngFilterMethod.cs (97%)
 delete mode 100644 src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
 delete mode 100644 src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
 rename src/ImageSharp/Processing/{DefaultInternalImageProcessorContext.cs => DefaultImageProcessorContext.cs} (85%)
 delete mode 100644 src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
 create mode 100644 src/ImageSharp/Processing/IInternalImageProcessingContext.cs
 delete mode 100644 src/ImageSharp/Processing/Processors/DelegateProcessor.cs
 rename src/ImageSharp/Processing/Processors/Dithering/{ErrorDiffuserBase.cs => ErrorDiffuser.cs} (96%)
 rename src/ImageSharp/Processing/Processors/Transforms/{TransformProcessorBase.cs => TransformProcessor.cs} (89%)
 delete mode 100644 tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
 delete mode 100644 tests/ImageSharp.Tests/PixelFormats/ColorBuilderTests.cs
 delete mode 100644 tests/ImageSharp.Tests/PixelFormats/ColorDefinitionTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Processing/DelegateTest.cs

diff --git a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs
index 4a8ce44dbb..91da332a16 100644
--- a/src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/EllipticGradientBrush.cs
@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Processing
     /// a point on the longest extension of the ellipse and
     /// the ratio between longest and shortest extension.
     /// </summary>
-    public sealed class EllipticGradientBrush : GradientBrushBase
+    public sealed class EllipticGradientBrush : GradientBrush
     {
         private readonly PointF center;
 
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.Processing
 
         private readonly float axisRatio;
 
-        /// <inheritdoc cref="GradientBrushBase" />
+        /// <inheritdoc cref="GradientBrush" />
         /// <param name="center">The center of the elliptical gradient and 0 for the color stops.</param>
         /// <param name="referenceAxisEnd">The end point of the reference axis of the ellipse.</param>
         /// <param name="axisRatio">
@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.Processing
                 this.RepetitionMode);
 
         /// <inheritdoc />
-        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF center;
@@ -149,8 +149,7 @@ namespace SixLabors.ImageSharp.Processing
             {
                 var vA = a - junction;
                 var vB = b - junction;
-                return (float)(Math.Atan2(vB.Y, vB.X)
-                       - Math.Atan2(vA.Y, vA.X));
+                return MathF.Atan2(vB.Y, vB.X) - MathF.Atan2(vA.Y, vA.X);
             }
 
             private float DistanceBetween(
@@ -162,7 +161,7 @@ namespace SixLabors.ImageSharp.Processing
 
                 float dY = p1.Y - p2.Y;
                 float dYsquared = dY * dY;
-                return (float)Math.Sqrt(dXsquared + dYsquared);
+                return MathF.Sqrt(dXsquared + dYsquared);
             }
         }
     }
diff --git a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs b/src/ImageSharp.Drawing/Processing/GradientBrush.cs
similarity index 96%
rename from src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
rename to src/ImageSharp.Drawing/Processing/GradientBrush.cs
index 39dbcb61a5..9826748c46 100644
--- a/src/ImageSharp.Drawing/Processing/GradientBrushBase.cs
+++ b/src/ImageSharp.Drawing/Processing/GradientBrush.cs
@@ -13,12 +13,12 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// Base class for Gradient brushes
     /// </summary>
-    public abstract class GradientBrushBase : IBrush
+    public abstract class GradientBrush : IBrush
     {
         /// <inheritdoc cref="IBrush"/>
         /// <param name="repetitionMode">Defines how the colors are repeated beyond the interval [0..1]</param>
         /// <param name="colorStops">The gradient colors.</param>
-        protected GradientBrushBase(
+        protected GradientBrush(
             GradientRepetitionMode repetitionMode,
             params ColorStop[] colorStops)
         {
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Base class for gradient brush applicators
         /// </summary>
-        internal abstract class GradientBrushApplicatorBase<TPixel> : BrushApplicator<TPixel>
+        internal abstract class GradientBrushApplicator<TPixel> : BrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
             private static readonly TPixel Transparent = Color.Transparent.ToPixel<TPixel>();
@@ -56,13 +56,13 @@ namespace SixLabors.ImageSharp.Processing
             private readonly GradientRepetitionMode repetitionMode;
 
             /// <summary>
-            /// Initializes a new instance of the <see cref="GradientBrushApplicatorBase{TPixel}"/> class.
+            /// Initializes a new instance of the <see cref="GradientBrushApplicator{TPixel}"/> class.
             /// </summary>
             /// <param name="target">The target.</param>
             /// <param name="options">The options.</param>
             /// <param name="colorStops">An array of color stops sorted by their position.</param>
             /// <param name="repetitionMode">Defines if and how the gradient should be repeated.</param>
-            protected GradientBrushApplicatorBase(
+            protected GradientBrushApplicator(
                 ImageFrame<TPixel> target,
                 GraphicsOptions options,
                 ColorStop[] colorStops,
diff --git a/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
index 6eeadee5d6..bb99eeb26a 100644
--- a/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/LinearGradientBrush.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Processing
     /// Supported right now:
     /// - a set of colors in relative distances to each other.
     /// </summary>
-    public sealed class LinearGradientBrush : GradientBrushBase
+    public sealed class LinearGradientBrush : GradientBrush
     {
         private readonly PointF p1;
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// The linear gradient brush applicator.
         /// </summary>
-        private sealed class LinearGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+        private sealed class LinearGradientBrushApplicator<TPixel> : GradientBrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF start;
@@ -121,7 +121,7 @@ namespace SixLabors.ImageSharp.Processing
 
                 // some helpers:
                 this.alongsSquared = (this.alongX * this.alongX) + (this.alongY * this.alongY);
-                this.length = (float)Math.Sqrt(this.alongsSquared);
+                this.length = MathF.Sqrt(this.alongsSquared);
             }
 
             protected override float PositionOnGradient(float x, float y)
@@ -145,7 +145,7 @@ namespace SixLabors.ImageSharp.Processing
                     float y4 = y + (k * this.alongX);
 
                     // get distance from (x4,y4) to start
-                    float distance = (float)Math.Sqrt(Math.Pow(x4 - this.start.X, 2) + Math.Pow(y4 - this.start.Y, 2));
+                    float distance = MathF.Sqrt(MathF.Pow(x4 - this.start.X, 2) + MathF.Pow(y4 - this.start.Y, 2));
 
                     // get and return ratio
                     float ratio = distance / this.length;
diff --git a/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs b/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
index aac0f2e7bd..f4d2dd81f4 100644
--- a/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
+++ b/src/ImageSharp.Drawing/Processing/RadialGradientBrush.cs
@@ -11,13 +11,13 @@ namespace SixLabors.ImageSharp.Processing
     /// <summary>
     /// A Circular Gradient Brush, defined by center point and radius.
     /// </summary>
-    public sealed class RadialGradientBrush : GradientBrushBase
+    public sealed class RadialGradientBrush : GradientBrush
     {
         private readonly PointF center;
 
         private readonly float radius;
 
-        /// <inheritdoc cref="GradientBrushBase" />
+        /// <inheritdoc cref="GradientBrush" />
         /// <param name="center">The center of the circular gradient and 0 for the color stops.</param>
         /// <param name="radius">The radius of the circular gradient and 1 for the color stops.</param>
         /// <param name="repetitionMode">Defines how the colors in the gradient are repeated.</param>
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.Processing
                 this.RepetitionMode);
 
         /// <inheritdoc />
-        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicatorBase<TPixel>
+        private sealed class RadialGradientBrushApplicator<TPixel> : GradientBrushApplicator<TPixel>
             where TPixel : struct, IPixel<TPixel>
         {
             private readonly PointF center;
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.Processing
             /// <returns>the position on the color gradient.</returns>
             protected override float PositionOnGradient(float x, float y)
             {
-                float distance = (float)Math.Sqrt(Math.Pow(this.center.X - x, 2) + Math.Pow(this.center.Y - y, 2));
+                float distance = MathF.Sqrt(MathF.Pow(this.center.X - x, 2) + MathF.Pow(this.center.Y - y, 2));
                 return distance / this.radius;
             }
 
diff --git a/src/ImageSharp/Color/Color.cs b/src/ImageSharp/Color/Color.cs
index 0d94ac18c8..2547e6d873 100644
--- a/src/ImageSharp/Color/Color.cs
+++ b/src/ImageSharp/Color/Color.cs
@@ -104,18 +104,11 @@ namespace SixLabors.ImageSharp
         /// in rgb, rgba, rrggbb, or rrggbbaa format to match web syntax.
         /// </param>
         /// <returns>Returns a <see cref="Color"/> that represents the color defined by the provided RGBA hex string.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
         public static Color FromHex(string hex)
         {
-            Guard.NotNullOrWhiteSpace(hex, nameof(hex));
-
-            hex = ToRgbaHex(hex);
-
-            if (hex is null || !uint.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out uint packedValue))
-            {
-                throw new ArgumentException("Hexadecimal string is not in the correct format.", nameof(hex));
-            }
+            Rgba32 rgba = Rgba32.FromHex(hex);
 
-            var rgba = new Rgba32(BinaryPrimitives.ReverseEndianness(packedValue));
             return new Color(rgba);
         }
 
@@ -189,42 +182,5 @@ namespace SixLabors.ImageSharp
             ReadOnlySpan<Rgba64> rgba64Span = MemoryMarshal.Cast<Color, Rgba64>(source);
             PixelOperations<TPixel>.Instance.FromRgba64(Configuration.Default, rgba64Span, destination);
         }
-
-        /// <summary>
-        /// Converts the specified hex value to an rrggbbaa hex value.
-        /// </summary>
-        /// <param name="hex">The hex value to convert.</param>
-        /// <returns>
-        /// A rrggbbaa hex value.
-        /// </returns>
-        private static string ToRgbaHex(string hex)
-        {
-            if (hex[0] == '#')
-            {
-                hex = hex.Substring(1);
-            }
-
-            if (hex.Length == 8)
-            {
-                return hex;
-            }
-
-            if (hex.Length == 6)
-            {
-                return hex + "FF";
-            }
-
-            if (hex.Length < 3 || hex.Length > 4)
-            {
-                return null;
-            }
-
-            char r = hex[0];
-            char g = hex[1];
-            char b = hex[2];
-            char a = hex.Length == 3 ? 'F' : hex[3];
-
-            return new string(new[] { r, r, g, g, b, b, a, a });
-        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
index 2cc8437bba..21d576fb41 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
@@ -465,7 +465,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="workingSpace">The source working space</param>
         /// <returns>The <see cref="LinearRgbToCieXyzConverter"/></returns>
-        private LinearRgbToCieXyzConverter GetLinearRgbToCieXyzConverter(RgbWorkingSpaceBase workingSpace)
+        private LinearRgbToCieXyzConverter GetLinearRgbToCieXyzConverter(RgbWorkingSpace workingSpace)
         {
             if (this.linearRgbToCieXyzConverter?.SourceWorkingSpace.Equals(workingSpace) == true)
             {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
index fe6a57f7ac..bcbd64c77a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         private readonly CieXyz targetLuvWhitePoint;
         private readonly CieXyz targetLabWhitePoint;
         private readonly CieXyz targetHunterLabWhitePoint;
-        private readonly RgbWorkingSpaceBase targetRgbWorkingSpace;
+        private readonly RgbWorkingSpace targetRgbWorkingSpace;
         private readonly IChromaticAdaptation chromaticAdaptation;
         private readonly bool performChromaticAdaptation;
         private readonly CieXyzAndLmsConverter cieXyzAndLmsConverter;
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverterOptions.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverterOptions.cs
index fcd031e263..65fe799949 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverterOptions.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverterOptions.cs
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// Gets or sets the target working space used *when creating* RGB colors. (RGB colors on the input already contain the working space information)
         /// Defaults to: <see cref="Rgb.DefaultWorkingSpace"/>.
         /// </summary>
-        public RgbWorkingSpaceBase TargetRgbWorkingSpace { get; set; } = Rgb.DefaultWorkingSpace;
+        public RgbWorkingSpace TargetRgbWorkingSpace { get; set; } = Rgb.DefaultWorkingSpace;
 
         /// <summary>
         /// Gets or sets the chromatic adaptation method used. When <value>null</value>, no adaptation will be performed.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
index f166e4c14a..6497e3060c 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieXyzToLinearRgbConverter.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Initializes a new instance of the <see cref="CieXyzToLinearRgbConverter"/> class.
         /// </summary>
         /// <param name="workingSpace">The target working space.</param>
-        public CieXyzToLinearRgbConverter(RgbWorkingSpaceBase workingSpace)
+        public CieXyzToLinearRgbConverter(RgbWorkingSpace workingSpace)
         {
             this.TargetWorkingSpace = workingSpace;
 
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// <summary>
         /// Gets the target working space.
         /// </summary>
-        public RgbWorkingSpaceBase TargetWorkingSpace { get; }
+        public RgbWorkingSpace TargetWorkingSpace { get; }
 
         /// <summary>
         /// Performs the conversion from the <see cref="CieXyz"/> input to an instance of <see cref="LinearRgb"/> type.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbAndCieXyzConverterBase.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbAndCieXyzConverterBase.cs
index a93773262c..bdf451cd3c 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbAndCieXyzConverterBase.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbAndCieXyzConverterBase.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// </summary>
         /// <param name="workingSpace">The Rgb working space.</param>
         /// <returns>The <see cref="Matrix4x4"/> based on the chromaticity and working space.</returns>
-        public static Matrix4x4 GetRgbToCieXyzMatrix(RgbWorkingSpaceBase workingSpace)
+        public static Matrix4x4 GetRgbToCieXyzMatrix(RgbWorkingSpace workingSpace)
         {
             DebugGuard.NotNull(workingSpace, nameof(workingSpace));
             RgbPrimariesChromaticityCoordinates chromaticity = workingSpace.ChromaticityCoordinates;
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToCieXyzConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToCieXyzConverter.cs
index 1030ac9819..21a96071af 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToCieXyzConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/LinearRgbToCieXyzConverter.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// Initializes a new instance of the <see cref="LinearRgbToCieXyzConverter"/> class.
         /// </summary>
         /// <param name="workingSpace">The target working space.</param>
-        public LinearRgbToCieXyzConverter(RgbWorkingSpaceBase workingSpace)
+        public LinearRgbToCieXyzConverter(RgbWorkingSpace workingSpace)
         {
             this.SourceWorkingSpace = workingSpace;
             this.conversionMatrix = GetRgbToCieXyzMatrix(workingSpace);
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// <summary>
         /// Gets the source working space
         /// </summary>
-        public RgbWorkingSpaceBase SourceWorkingSpace { get; }
+        public RgbWorkingSpace SourceWorkingSpace { get; }
 
         /// <summary>
         /// Performs the conversion from the <see cref="LinearRgb"/> input to an instance of <see cref="CieXyz"/> type.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
index 4c69133e0f..e28f3f1a4a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
     /// Represents the chromaticity coordinates of RGB primaries.
-    /// One of the specifiers of <see cref="RgbWorkingSpaceBase"/>.
+    /// One of the specifiers of <see cref="RgbWorkingSpace"/>.
     /// </summary>
     public readonly struct RgbPrimariesChromaticityCoordinates : IEquatable<RgbPrimariesChromaticityCoordinates>
     {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
index c45dea3179..6caca54cdc 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
@@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// The gamma working space.
     /// </summary>
-    public sealed class GammaWorkingSpace : RgbWorkingSpaceBase
+    public sealed class GammaWorkingSpace : RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="GammaWorkingSpace" /> class.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/LWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/LWorkingSpace.cs
index 16617ea242..a2eb42ad0b 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/LWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/LWorkingSpace.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// L* working space.
     /// </summary>
-    public sealed class LWorkingSpace : RgbWorkingSpaceBase
+    public sealed class LWorkingSpace : RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="LWorkingSpace" /> class.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec2020WorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec2020WorkingSpace.cs
index 9ba1ff8811..a794b3dda7 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec2020WorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec2020WorkingSpace.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// Rec. 2020 (ITU-R Recommendation BT.2020F) working space.
     /// </summary>
-    public sealed class Rec2020WorkingSpace : RgbWorkingSpaceBase
+    public sealed class Rec2020WorkingSpace : RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="Rec2020WorkingSpace" /> class.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec709WorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec709WorkingSpace.cs
index 88623e958d..ffa9699bc5 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec709WorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/Rec709WorkingSpace.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// Rec. 709 (ITU-R Recommendation BT.709) working space.
     /// </summary>
-    public sealed class Rec709WorkingSpace : RgbWorkingSpaceBase
+    public sealed class Rec709WorkingSpace : RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="Rec709WorkingSpace" /> class.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpaceBase.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
similarity index 91%
rename from src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpaceBase.cs
rename to src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
index 6051f52865..a97ae22b18 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpaceBase.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
@@ -6,16 +6,16 @@ using System;
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
 {
     /// <summary>
-    /// Base class for all implementations of <see cref="RgbWorkingSpaceBase"/>.
+    /// Base class for all implementations of <see cref="RgbWorkingSpace"/>.
     /// </summary>
-    public abstract class RgbWorkingSpaceBase
+    public abstract class RgbWorkingSpace
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="RgbWorkingSpaceBase"/> class.
+        /// Initializes a new instance of the <see cref="RgbWorkingSpace"/> class.
         /// </summary>
         /// <param name="referenceWhite">The reference white point.</param>
         /// <param name="chromaticityCoordinates">The chromaticity of the rgb primaries.</param>
-        protected RgbWorkingSpaceBase(CieXyz referenceWhite, RgbPrimariesChromaticityCoordinates chromaticityCoordinates)
+        protected RgbWorkingSpace(CieXyz referenceWhite, RgbPrimariesChromaticityCoordinates chromaticityCoordinates)
         {
             this.WhitePoint = referenceWhite;
             this.ChromaticityCoordinates = chromaticityCoordinates;
@@ -66,7 +66,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
                 return true;
             }
 
-            if (obj is RgbWorkingSpaceBase other)
+            if (obj is RgbWorkingSpace other)
             {
                 return this.WhitePoint.Equals(other.WhitePoint)
                     && this.ChromaticityCoordinates.Equals(other.ChromaticityCoordinates);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/SRgbWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/SRgbWorkingSpace.cs
index b44db06817..c3d850251a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/SRgbWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/SRgbWorkingSpace.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
     /// <summary>
     /// The sRgb working space.
     /// </summary>
-    public sealed class SRgbWorkingSpace : RgbWorkingSpaceBase
+    public sealed class SRgbWorkingSpace : RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="SRgbWorkingSpace" /> class.
diff --git a/src/ImageSharp/ColorSpaces/LinearRgb.cs b/src/ImageSharp/ColorSpaces/LinearRgb.cs
index 46b2275968..7ef50e9c41 100644
--- a/src/ImageSharp/ColorSpaces/LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/LinearRgb.cs
@@ -9,7 +9,7 @@ using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation;
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Represents an linear Rgb color with specified <see cref="RgbWorkingSpaceBase"/> working space
+    /// Represents an linear Rgb color with specified <see cref="RgbWorkingSpace"/> working space
     /// </summary>
     public readonly struct LinearRgb : IEquatable<LinearRgb>
     {
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <summary>
         /// The default LinearRgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
+        public static readonly RgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
 
         /// <summary>
         /// Gets the red component.
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <summary>
         /// Gets the LinearRgb color space <seealso cref="RgbWorkingSpaces"/>
         /// </summary>
-        public readonly RgbWorkingSpaceBase WorkingSpace;
+        public readonly RgbWorkingSpace WorkingSpace;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="LinearRgb"/> struct.
@@ -64,7 +64,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="b">The blue component ranging between 0 and 1.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public LinearRgb(float r, float g, float b, RgbWorkingSpaceBase workingSpace)
+        public LinearRgb(float r, float g, float b, RgbWorkingSpace workingSpace)
             : this(new Vector3(r, g, b), workingSpace)
         {
         }
@@ -85,7 +85,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="vector">The vector representing the r, g, b components.</param>
         /// <param name="workingSpace">The LinearRgb working space.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public LinearRgb(Vector3 vector, RgbWorkingSpaceBase workingSpace)
+        public LinearRgb(Vector3 vector, RgbWorkingSpace workingSpace)
         {
             // Clamp to 0-1 range.
             vector = Vector3.Clamp(vector, Min, Max);
diff --git a/src/ImageSharp/ColorSpaces/Rgb.cs b/src/ImageSharp/ColorSpaces/Rgb.cs
index 5cb89a2931..bb71deba3b 100644
--- a/src/ImageSharp/ColorSpaces/Rgb.cs
+++ b/src/ImageSharp/ColorSpaces/Rgb.cs
@@ -10,14 +10,14 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Represents an RGB color with specified <see cref="RgbWorkingSpaceBase"/> working space.
+    /// Represents an RGB color with specified <see cref="RgbWorkingSpace"/> working space.
     /// </summary>
     public readonly struct Rgb : IEquatable<Rgb>
     {
         /// <summary>
         /// The default rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
+        public static readonly RgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
 
         private static readonly Vector3 Min = Vector3.Zero;
         private static readonly Vector3 Max = Vector3.One;
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <summary>
         /// Gets the Rgb color space <seealso cref="RgbWorkingSpaces"/>
         /// </summary>
-        public readonly RgbWorkingSpaceBase WorkingSpace;
+        public readonly RgbWorkingSpace WorkingSpace;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Rgb"/> struct.
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="b">The blue component ranging between 0 and 1.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Rgb(float r, float g, float b, RgbWorkingSpaceBase workingSpace)
+        public Rgb(float r, float g, float b, RgbWorkingSpace workingSpace)
             : this(new Vector3(r, g, b), workingSpace)
         {
         }
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="vector">The vector representing the r, g, b components.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public Rgb(Vector3 vector, RgbWorkingSpaceBase workingSpace)
+        public Rgb(Vector3 vector, RgbWorkingSpace workingSpace)
         {
             vector = Vector3.Clamp(vector, Min, Max);
             this.R = vector.X;
diff --git a/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs b/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
index 7ddcae7cea..3f40fa4f58 100644
--- a/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
+++ b/src/ImageSharp/ColorSpaces/RgbWorkingSpaces.cs
@@ -19,97 +19,97 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// Uses proper companding function, according to:
         /// <see href="http://www.brucelindbloom.com/index.html?Eqn_Rgb_to_XYZ.html"/>
         /// </remarks>
-        public static readonly RgbWorkingSpaceBase SRgb = new SRgbWorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.3000F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
+        public static readonly RgbWorkingSpace SRgb = new SRgbWorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.3000F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
 
         /// <summary>
         /// Simplified sRgb working space (uses <see cref="GammaCompanding">gamma companding</see> instead of <see cref="SRgbCompanding"/>).
         /// See also <see cref="SRgb"/>.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase SRgbSimplified = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.3000F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
+        public static readonly RgbWorkingSpace SRgbSimplified = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.3000F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
 
         /// <summary>
         /// Rec. 709 (ITU-R Recommendation BT.709) working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase Rec709 = new Rec709WorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.64F, 0.33F), new CieXyChromaticityCoordinates(0.30F, 0.60F), new CieXyChromaticityCoordinates(0.15F, 0.06F)));
+        public static readonly RgbWorkingSpace Rec709 = new Rec709WorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.64F, 0.33F), new CieXyChromaticityCoordinates(0.30F, 0.60F), new CieXyChromaticityCoordinates(0.15F, 0.06F)));
 
         /// <summary>
         /// Rec. 2020 (ITU-R Recommendation BT.2020F) working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase Rec2020 = new Rec2020WorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.708F, 0.292F), new CieXyChromaticityCoordinates(0.170F, 0.797F), new CieXyChromaticityCoordinates(0.131F, 0.046F)));
+        public static readonly RgbWorkingSpace Rec2020 = new Rec2020WorkingSpace(Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.708F, 0.292F), new CieXyChromaticityCoordinates(0.170F, 0.797F), new CieXyChromaticityCoordinates(0.131F, 0.046F)));
 
         /// <summary>
         /// ECI Rgb v2 working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase ECIRgbv2 = new LWorkingSpace(Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6700F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1400F, 0.0800F)));
+        public static readonly RgbWorkingSpace ECIRgbv2 = new LWorkingSpace(Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6700F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1400F, 0.0800F)));
 
         /// <summary>
         /// Adobe Rgb (1998) working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase AdobeRgb1998 = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
+        public static readonly RgbWorkingSpace AdobeRgb1998 = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
 
         /// <summary>
         /// Apple sRgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase ApplesRgb = new GammaWorkingSpace(1.8F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6250F, 0.3400F), new CieXyChromaticityCoordinates(0.2800F, 0.5950F), new CieXyChromaticityCoordinates(0.1550F, 0.0700F)));
+        public static readonly RgbWorkingSpace ApplesRgb = new GammaWorkingSpace(1.8F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6250F, 0.3400F), new CieXyChromaticityCoordinates(0.2800F, 0.5950F), new CieXyChromaticityCoordinates(0.1550F, 0.0700F)));
 
         /// <summary>
         /// Best Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase BestRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7347F, 0.2653F), new CieXyChromaticityCoordinates(0.2150F, 0.7750F), new CieXyChromaticityCoordinates(0.1300F, 0.0350F)));
+        public static readonly RgbWorkingSpace BestRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7347F, 0.2653F), new CieXyChromaticityCoordinates(0.2150F, 0.7750F), new CieXyChromaticityCoordinates(0.1300F, 0.0350F)));
 
         /// <summary>
         /// Beta Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase BetaRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6888F, 0.3112F), new CieXyChromaticityCoordinates(0.1986F, 0.7551F), new CieXyChromaticityCoordinates(0.1265F, 0.0352F)));
+        public static readonly RgbWorkingSpace BetaRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6888F, 0.3112F), new CieXyChromaticityCoordinates(0.1986F, 0.7551F), new CieXyChromaticityCoordinates(0.1265F, 0.0352F)));
 
         /// <summary>
         /// Bruce Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase BruceRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2800F, 0.6500F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
+        public static readonly RgbWorkingSpace BruceRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2800F, 0.6500F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
 
         /// <summary>
         /// CIE Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase CIERgb = new GammaWorkingSpace(2.2F, Illuminants.E, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7350F, 0.2650F), new CieXyChromaticityCoordinates(0.2740F, 0.7170F), new CieXyChromaticityCoordinates(0.1670F, 0.0090F)));
+        public static readonly RgbWorkingSpace CIERgb = new GammaWorkingSpace(2.2F, Illuminants.E, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7350F, 0.2650F), new CieXyChromaticityCoordinates(0.2740F, 0.7170F), new CieXyChromaticityCoordinates(0.1670F, 0.0090F)));
 
         /// <summary>
         /// ColorMatch Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase ColorMatchRgb = new GammaWorkingSpace(1.8F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6300F, 0.3400F), new CieXyChromaticityCoordinates(0.2950F, 0.6050F), new CieXyChromaticityCoordinates(0.1500F, 0.0750F)));
+        public static readonly RgbWorkingSpace ColorMatchRgb = new GammaWorkingSpace(1.8F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6300F, 0.3400F), new CieXyChromaticityCoordinates(0.2950F, 0.6050F), new CieXyChromaticityCoordinates(0.1500F, 0.0750F)));
 
         /// <summary>
         /// Don Rgb 4 working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase DonRgb4 = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6960F, 0.3000F), new CieXyChromaticityCoordinates(0.2150F, 0.7650F), new CieXyChromaticityCoordinates(0.1300F, 0.0350F)));
+        public static readonly RgbWorkingSpace DonRgb4 = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6960F, 0.3000F), new CieXyChromaticityCoordinates(0.2150F, 0.7650F), new CieXyChromaticityCoordinates(0.1300F, 0.0350F)));
 
         /// <summary>
         /// Ekta Space PS5 working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase EktaSpacePS5 = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6950F, 0.3050F), new CieXyChromaticityCoordinates(0.2600F, 0.7000F), new CieXyChromaticityCoordinates(0.1100F, 0.0050F)));
+        public static readonly RgbWorkingSpace EktaSpacePS5 = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6950F, 0.3050F), new CieXyChromaticityCoordinates(0.2600F, 0.7000F), new CieXyChromaticityCoordinates(0.1100F, 0.0050F)));
 
         /// <summary>
         /// NTSC Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase NTSCRgb = new GammaWorkingSpace(2.2F, Illuminants.C, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6700F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1400F, 0.0800F)));
+        public static readonly RgbWorkingSpace NTSCRgb = new GammaWorkingSpace(2.2F, Illuminants.C, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6700F, 0.3300F), new CieXyChromaticityCoordinates(0.2100F, 0.7100F), new CieXyChromaticityCoordinates(0.1400F, 0.0800F)));
 
         /// <summary>
         /// PAL/SECAM Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase PALSECAMRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2900F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
+        public static readonly RgbWorkingSpace PALSECAMRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6400F, 0.3300F), new CieXyChromaticityCoordinates(0.2900F, 0.6000F), new CieXyChromaticityCoordinates(0.1500F, 0.0600F)));
 
         /// <summary>
         /// ProPhoto Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase ProPhotoRgb = new GammaWorkingSpace(1.8F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7347F, 0.2653F), new CieXyChromaticityCoordinates(0.1596F, 0.8404F), new CieXyChromaticityCoordinates(0.0366F, 0.0001F)));
+        public static readonly RgbWorkingSpace ProPhotoRgb = new GammaWorkingSpace(1.8F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7347F, 0.2653F), new CieXyChromaticityCoordinates(0.1596F, 0.8404F), new CieXyChromaticityCoordinates(0.0366F, 0.0001F)));
 
         /// <summary>
         /// SMPTE-C Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase SMPTECRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6300F, 0.3400F), new CieXyChromaticityCoordinates(0.3100F, 0.5950F), new CieXyChromaticityCoordinates(0.1550F, 0.0700F)));
+        public static readonly RgbWorkingSpace SMPTECRgb = new GammaWorkingSpace(2.2F, Illuminants.D65, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.6300F, 0.3400F), new CieXyChromaticityCoordinates(0.3100F, 0.5950F), new CieXyChromaticityCoordinates(0.1550F, 0.0700F)));
 
         /// <summary>
         /// Wide Gamut Rgb working space.
         /// </summary>
-        public static readonly RgbWorkingSpaceBase WideGamutRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7350F, 0.2650F), new CieXyChromaticityCoordinates(0.1150F, 0.8260F), new CieXyChromaticityCoordinates(0.1570F, 0.0180F)));
+        public static readonly RgbWorkingSpace WideGamutRgb = new GammaWorkingSpace(2.2F, Illuminants.D50, new RgbPrimariesChromaticityCoordinates(new CieXyChromaticityCoordinates(0.7350F, 0.2650F), new CieXyChromaticityCoordinates(0.1150F, 0.8260F), new CieXyChromaticityCoordinates(0.1570F, 0.0180F)));
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/PngFilterMethod.cs b/src/ImageSharp/Formats/Png/PngFilterMethod.cs
similarity index 97%
rename from src/ImageSharp/Formats/PngFilterMethod.cs
rename to src/ImageSharp/Formats/Png/PngFilterMethod.cs
index 73c4056257..e16c1234f6 100644
--- a/src/ImageSharp/Formats/PngFilterMethod.cs
+++ b/src/ImageSharp/Formats/Png/PngFilterMethod.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-namespace SixLabors.ImageSharp.Formats
+namespace SixLabors.ImageSharp.Formats.Png
 {
     /// <summary>
     /// Provides enumeration of available PNG filter methods.
diff --git a/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs b/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
deleted file mode 100644
index c1fb13e4da..0000000000
--- a/src/ImageSharp/PixelFormats/ColorBuilder{TPixel}.cs
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Buffers.Binary;
-using System.Globalization;
-
-namespace SixLabors.ImageSharp.PixelFormats
-{
-    /// <summary>
-    /// A set of named colors mapped to the provided Color space.
-    /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
-    public static class ColorBuilder<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Creates a new <typeparamref name="TPixel"/> representation from the string representing a color.
-        /// </summary>
-        /// <param name="hex">
-        /// The hexadecimal representation of the combined color components arranged
-        /// in rgb, rgba, rrggbb, or rrggbbaa format to match web syntax.
-        /// </param>
-        /// <returns>Returns a <typeparamref name="TPixel"/> that represents the color defined by the provided RGBA hex string.</returns>
-        public static TPixel FromHex(string hex)
-        {
-            Guard.NotNullOrWhiteSpace(hex, nameof(hex));
-
-            hex = ToRgbaHex(hex);
-
-            if (hex is null || !uint.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out uint packedValue))
-            {
-                throw new ArgumentException("Hexadecimal string is not in the correct format.", nameof(hex));
-            }
-
-            TPixel result = default;
-            var rgba = new Rgba32(BinaryPrimitives.ReverseEndianness(packedValue));
-
-            result.FromRgba32(rgba);
-            return result;
-        }
-
-        /// <summary>
-        /// Creates a new <typeparamref name="TPixel"/> representation from standard RGB bytes with 100% opacity.
-        /// </summary>
-        /// <param name="red">The red intensity.</param>
-        /// <param name="green">The green intensity.</param>
-        /// <param name="blue">The blue intensity.</param>
-        /// <returns>Returns a <typeparamref name="TPixel"/> that represents the color defined by the provided RGB values with 100% opacity.</returns>
-        public static TPixel FromRgb(byte red, byte green, byte blue) => FromRgba(red, green, blue, 255);
-
-        /// <summary>
-        /// Creates a new <typeparamref name="TPixel"/> representation from standard RGBA bytes.
-        /// </summary>
-        /// <param name="red">The red intensity.</param>
-        /// <param name="green">The green intensity.</param>
-        /// <param name="blue">The blue intensity.</param>
-        /// <param name="alpha">The alpha intensity.</param>
-        /// <returns>Returns a <typeparamref name="TPixel"/> that represents the color defined by the provided RGBA values.</returns>
-        public static TPixel FromRgba(byte red, byte green, byte blue, byte alpha)
-        {
-            TPixel color = default;
-            color.FromRgba32(new Rgba32(red, green, blue, alpha));
-            return color;
-        }
-
-        /// <summary>
-        /// Converts the specified hex value to an rrggbbaa hex value.
-        /// </summary>
-        /// <param name="hex">The hex value to convert.</param>
-        /// <returns>
-        /// A rrggbbaa hex value.
-        /// </returns>
-        private static string ToRgbaHex(string hex)
-        {
-            if (hex[0] == '#')
-            {
-                hex = hex.Substring(1);
-            }
-
-            if (hex.Length == 8)
-            {
-                return hex;
-            }
-
-            if (hex.Length == 6)
-            {
-                return hex + "FF";
-            }
-
-            if (hex.Length < 3 || hex.Length > 4)
-            {
-                return null;
-            }
-
-            char r = hex[0];
-            char g = hex[1];
-            char b = hex[2];
-            char a = hex.Length == 3 ? 'F' : hex[3];
-
-            return new string(new[] { r, r, g, g, b, b, a, a });
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs b/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
deleted file mode 100644
index 2138e2e2f7..0000000000
--- a/src/ImageSharp/PixelFormats/NamedColors{TPixel}.cs
+++ /dev/null
@@ -1,761 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Runtime.InteropServices;
-
-namespace SixLabors.ImageSharp.PixelFormats
-{
-    /// <summary>
-    /// A set of named colors mapped to the provided color space.
-    /// </summary>
-    /// <typeparam name="TPixel">The type of the color.</typeparam>
-    public static class NamedColors<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Thread-safe backing field for the constant palettes.
-        /// </summary>
-        private static readonly Lazy<TPixel[]> WebSafePaletteLazy = new Lazy<TPixel[]>(GetWebSafePalette, true);
-        private static readonly Lazy<TPixel[]> WernerPaletteLazy = new Lazy<TPixel[]>(GetWernerPalette, true);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0F8FF.
-        /// </summary>
-        public static readonly TPixel AliceBlue = ColorBuilder<TPixel>.FromRgba(240, 248, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAEBD7.
-        /// </summary>
-        public static readonly TPixel AntiqueWhite = ColorBuilder<TPixel>.FromRgba(250, 235, 215, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FFFF.
-        /// </summary>
-        public static readonly TPixel Aqua = ColorBuilder<TPixel>.FromRgba(0, 255, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7FFFD4.
-        /// </summary>
-        public static readonly TPixel Aquamarine = ColorBuilder<TPixel>.FromRgba(127, 255, 212, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0FFFF.
-        /// </summary>
-        public static readonly TPixel Azure = ColorBuilder<TPixel>.FromRgba(240, 255, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5F5DC.
-        /// </summary>
-        public static readonly TPixel Beige = ColorBuilder<TPixel>.FromRgba(245, 245, 220, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4C4.
-        /// </summary>
-        public static readonly TPixel Bisque = ColorBuilder<TPixel>.FromRgba(255, 228, 196, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #000000.
-        /// </summary>
-        public static readonly TPixel Black = ColorBuilder<TPixel>.FromRgba(0, 0, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFEBCD.
-        /// </summary>
-        public static readonly TPixel BlanchedAlmond = ColorBuilder<TPixel>.FromRgba(255, 235, 205, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #0000FF.
-        /// </summary>
-        public static readonly TPixel Blue = ColorBuilder<TPixel>.FromRgba(0, 0, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8A2BE2.
-        /// </summary>
-        public static readonly TPixel BlueViolet = ColorBuilder<TPixel>.FromRgba(138, 43, 226, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A52A2A.
-        /// </summary>
-        public static readonly TPixel Brown = ColorBuilder<TPixel>.FromRgba(165, 42, 42, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DEB887.
-        /// </summary>
-        public static readonly TPixel BurlyWood = ColorBuilder<TPixel>.FromRgba(222, 184, 135, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #5F9EA0.
-        /// </summary>
-        public static readonly TPixel CadetBlue = ColorBuilder<TPixel>.FromRgba(95, 158, 160, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7FFF00.
-        /// </summary>
-        public static readonly TPixel Chartreuse = ColorBuilder<TPixel>.FromRgba(127, 255, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D2691E.
-        /// </summary>
-        public static readonly TPixel Chocolate = ColorBuilder<TPixel>.FromRgba(210, 105, 30, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF7F50.
-        /// </summary>
-        public static readonly TPixel Coral = ColorBuilder<TPixel>.FromRgba(255, 127, 80, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6495ED.
-        /// </summary>
-        public static readonly TPixel CornflowerBlue = ColorBuilder<TPixel>.FromRgba(100, 149, 237, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF8DC.
-        /// </summary>
-        public static readonly TPixel Cornsilk = ColorBuilder<TPixel>.FromRgba(255, 248, 220, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DC143C.
-        /// </summary>
-        public static readonly TPixel Crimson = ColorBuilder<TPixel>.FromRgba(220, 20, 60, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FFFF.
-        /// </summary>
-        public static readonly TPixel Cyan = ColorBuilder<TPixel>.FromRgba(0, 255, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00008B.
-        /// </summary>
-        public static readonly TPixel DarkBlue = ColorBuilder<TPixel>.FromRgba(0, 0, 139, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008B8B.
-        /// </summary>
-        public static readonly TPixel DarkCyan = ColorBuilder<TPixel>.FromRgba(0, 139, 139, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B8860B.
-        /// </summary>
-        public static readonly TPixel DarkGoldenrod = ColorBuilder<TPixel>.FromRgba(184, 134, 11, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A9A9A9.
-        /// </summary>
-        public static readonly TPixel DarkGray = ColorBuilder<TPixel>.FromRgba(169, 169, 169, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #006400.
-        /// </summary>
-        public static readonly TPixel DarkGreen = ColorBuilder<TPixel>.FromRgba(0, 100, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BDB76B.
-        /// </summary>
-        public static readonly TPixel DarkKhaki = ColorBuilder<TPixel>.FromRgba(189, 183, 107, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B008B.
-        /// </summary>
-        public static readonly TPixel DarkMagenta = ColorBuilder<TPixel>.FromRgba(139, 0, 139, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #556B2F.
-        /// </summary>
-        public static readonly TPixel DarkOliveGreen = ColorBuilder<TPixel>.FromRgba(85, 107, 47, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF8C00.
-        /// </summary>
-        public static readonly TPixel DarkOrange = ColorBuilder<TPixel>.FromRgba(255, 140, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9932CC.
-        /// </summary>
-        public static readonly TPixel DarkOrchid = ColorBuilder<TPixel>.FromRgba(153, 50, 204, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B0000.
-        /// </summary>
-        public static readonly TPixel DarkRed = ColorBuilder<TPixel>.FromRgba(139, 0, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E9967A.
-        /// </summary>
-        public static readonly TPixel DarkSalmon = ColorBuilder<TPixel>.FromRgba(233, 150, 122, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8FBC8B.
-        /// </summary>
-        public static readonly TPixel DarkSeaGreen = ColorBuilder<TPixel>.FromRgba(143, 188, 139, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #483D8B.
-        /// </summary>
-        public static readonly TPixel DarkSlateBlue = ColorBuilder<TPixel>.FromRgba(72, 61, 139, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #2F4F4F.
-        /// </summary>
-        public static readonly TPixel DarkSlateGray = ColorBuilder<TPixel>.FromRgba(47, 79, 79, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00CED1.
-        /// </summary>
-        public static readonly TPixel DarkTurquoise = ColorBuilder<TPixel>.FromRgba(0, 206, 209, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9400D3.
-        /// </summary>
-        public static readonly TPixel DarkViolet = ColorBuilder<TPixel>.FromRgba(148, 0, 211, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF1493.
-        /// </summary>
-        public static readonly TPixel DeepPink = ColorBuilder<TPixel>.FromRgba(255, 20, 147, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00BFFF.
-        /// </summary>
-        public static readonly TPixel DeepSkyBlue = ColorBuilder<TPixel>.FromRgba(0, 191, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #696969.
-        /// </summary>
-        public static readonly TPixel DimGray = ColorBuilder<TPixel>.FromRgba(105, 105, 105, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #1E90FF.
-        /// </summary>
-        public static readonly TPixel DodgerBlue = ColorBuilder<TPixel>.FromRgba(30, 144, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B22222.
-        /// </summary>
-        public static readonly TPixel Firebrick = ColorBuilder<TPixel>.FromRgba(178, 34, 34, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFAF0.
-        /// </summary>
-        public static readonly TPixel FloralWhite = ColorBuilder<TPixel>.FromRgba(255, 250, 240, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #228B22.
-        /// </summary>
-        public static readonly TPixel ForestGreen = ColorBuilder<TPixel>.FromRgba(34, 139, 34, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF00FF.
-        /// </summary>
-        public static readonly TPixel Fuchsia = ColorBuilder<TPixel>.FromRgba(255, 0, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DCDCDC.
-        /// </summary>
-        public static readonly TPixel Gainsboro = ColorBuilder<TPixel>.FromRgba(220, 220, 220, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F8F8FF.
-        /// </summary>
-        public static readonly TPixel GhostWhite = ColorBuilder<TPixel>.FromRgba(248, 248, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFD700.
-        /// </summary>
-        public static readonly TPixel Gold = ColorBuilder<TPixel>.FromRgba(255, 215, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DAA520.
-        /// </summary>
-        public static readonly TPixel Goldenrod = ColorBuilder<TPixel>.FromRgba(218, 165, 32, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #808080.
-        /// </summary>
-        public static readonly TPixel Gray = ColorBuilder<TPixel>.FromRgba(128, 128, 128, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008000.
-        /// </summary>
-        public static readonly TPixel Green = ColorBuilder<TPixel>.FromRgba(0, 128, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #ADFF2F.
-        /// </summary>
-        public static readonly TPixel GreenYellow = ColorBuilder<TPixel>.FromRgba(173, 255, 47, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0FFF0.
-        /// </summary>
-        public static readonly TPixel Honeydew = ColorBuilder<TPixel>.FromRgba(240, 255, 240, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF69B4.
-        /// </summary>
-        public static readonly TPixel HotPink = ColorBuilder<TPixel>.FromRgba(255, 105, 180, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #CD5C5C.
-        /// </summary>
-        public static readonly TPixel IndianRed = ColorBuilder<TPixel>.FromRgba(205, 92, 92, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4B0082.
-        /// </summary>
-        public static readonly TPixel Indigo = ColorBuilder<TPixel>.FromRgba(75, 0, 130, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFF0.
-        /// </summary>
-        public static readonly TPixel Ivory = ColorBuilder<TPixel>.FromRgba(255, 255, 240, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F0E68C.
-        /// </summary>
-        public static readonly TPixel Khaki = ColorBuilder<TPixel>.FromRgba(240, 230, 140, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E6E6FA.
-        /// </summary>
-        public static readonly TPixel Lavender = ColorBuilder<TPixel>.FromRgba(230, 230, 250, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF0F5.
-        /// </summary>
-        public static readonly TPixel LavenderBlush = ColorBuilder<TPixel>.FromRgba(255, 240, 245, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7CFC00.
-        /// </summary>
-        public static readonly TPixel LawnGreen = ColorBuilder<TPixel>.FromRgba(124, 252, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFACD.
-        /// </summary>
-        public static readonly TPixel LemonChiffon = ColorBuilder<TPixel>.FromRgba(255, 250, 205, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #ADD8E6.
-        /// </summary>
-        public static readonly TPixel LightBlue = ColorBuilder<TPixel>.FromRgba(173, 216, 230, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F08080.
-        /// </summary>
-        public static readonly TPixel LightCoral = ColorBuilder<TPixel>.FromRgba(240, 128, 128, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #E0FFFF.
-        /// </summary>
-        public static readonly TPixel LightCyan = ColorBuilder<TPixel>.FromRgba(224, 255, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAFAD2.
-        /// </summary>
-        public static readonly TPixel LightGoldenrodYellow = ColorBuilder<TPixel>.FromRgba(250, 250, 210, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D3D3D3.
-        /// </summary>
-        public static readonly TPixel LightGray = ColorBuilder<TPixel>.FromRgba(211, 211, 211, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #90EE90.
-        /// </summary>
-        public static readonly TPixel LightGreen = ColorBuilder<TPixel>.FromRgba(144, 238, 144, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFB6C1.
-        /// </summary>
-        public static readonly TPixel LightPink = ColorBuilder<TPixel>.FromRgba(255, 182, 193, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFA07A.
-        /// </summary>
-        public static readonly TPixel LightSalmon = ColorBuilder<TPixel>.FromRgba(255, 160, 122, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #20B2AA.
-        /// </summary>
-        public static readonly TPixel LightSeaGreen = ColorBuilder<TPixel>.FromRgba(32, 178, 170, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #87CEFA.
-        /// </summary>
-        public static readonly TPixel LightSkyBlue = ColorBuilder<TPixel>.FromRgba(135, 206, 250, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #778899.
-        /// </summary>
-        public static readonly TPixel LightSlateGray = ColorBuilder<TPixel>.FromRgba(119, 136, 153, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B0C4DE.
-        /// </summary>
-        public static readonly TPixel LightSteelBlue = ColorBuilder<TPixel>.FromRgba(176, 196, 222, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFE0.
-        /// </summary>
-        public static readonly TPixel LightYellow = ColorBuilder<TPixel>.FromRgba(255, 255, 224, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FF00.
-        /// </summary>
-        public static readonly TPixel Lime = ColorBuilder<TPixel>.FromRgba(0, 255, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #32CD32.
-        /// </summary>
-        public static readonly TPixel LimeGreen = ColorBuilder<TPixel>.FromRgba(50, 205, 50, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FAF0E6.
-        /// </summary>
-        public static readonly TPixel Linen = ColorBuilder<TPixel>.FromRgba(250, 240, 230, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF00FF.
-        /// </summary>
-        public static readonly TPixel Magenta = ColorBuilder<TPixel>.FromRgba(255, 0, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #800000.
-        /// </summary>
-        public static readonly TPixel Maroon = ColorBuilder<TPixel>.FromRgba(128, 0, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #66CDAA.
-        /// </summary>
-        public static readonly TPixel MediumAquamarine = ColorBuilder<TPixel>.FromRgba(102, 205, 170, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #0000CD.
-        /// </summary>
-        public static readonly TPixel MediumBlue = ColorBuilder<TPixel>.FromRgba(0, 0, 205, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BA55D3.
-        /// </summary>
-        public static readonly TPixel MediumOrchid = ColorBuilder<TPixel>.FromRgba(186, 85, 211, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9370DB.
-        /// </summary>
-        public static readonly TPixel MediumPurple = ColorBuilder<TPixel>.FromRgba(147, 112, 219, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #3CB371.
-        /// </summary>
-        public static readonly TPixel MediumSeaGreen = ColorBuilder<TPixel>.FromRgba(60, 179, 113, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #7B68EE.
-        /// </summary>
-        public static readonly TPixel MediumSlateBlue = ColorBuilder<TPixel>.FromRgba(123, 104, 238, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FA9A.
-        /// </summary>
-        public static readonly TPixel MediumSpringGreen = ColorBuilder<TPixel>.FromRgba(0, 250, 154, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #48D1CC.
-        /// </summary>
-        public static readonly TPixel MediumTurquoise = ColorBuilder<TPixel>.FromRgba(72, 209, 204, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #C71585.
-        /// </summary>
-        public static readonly TPixel MediumVioletRed = ColorBuilder<TPixel>.FromRgba(199, 21, 133, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #191970.
-        /// </summary>
-        public static readonly TPixel MidnightBlue = ColorBuilder<TPixel>.FromRgba(25, 25, 112, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5FFFA.
-        /// </summary>
-        public static readonly TPixel MintCream = ColorBuilder<TPixel>.FromRgba(245, 255, 250, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4E1.
-        /// </summary>
-        public static readonly TPixel MistyRose = ColorBuilder<TPixel>.FromRgba(255, 228, 225, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFE4B5.
-        /// </summary>
-        public static readonly TPixel Moccasin = ColorBuilder<TPixel>.FromRgba(255, 228, 181, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFDEAD.
-        /// </summary>
-        public static readonly TPixel NavajoWhite = ColorBuilder<TPixel>.FromRgba(255, 222, 173, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #000080.
-        /// </summary>
-        public static readonly TPixel Navy = ColorBuilder<TPixel>.FromRgba(0, 0, 128, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FDF5E6.
-        /// </summary>
-        public static readonly TPixel OldLace = ColorBuilder<TPixel>.FromRgba(253, 245, 230, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #808000.
-        /// </summary>
-        public static readonly TPixel Olive = ColorBuilder<TPixel>.FromRgba(128, 128, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6B8E23.
-        /// </summary>
-        public static readonly TPixel OliveDrab = ColorBuilder<TPixel>.FromRgba(107, 142, 35, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFA500.
-        /// </summary>
-        public static readonly TPixel Orange = ColorBuilder<TPixel>.FromRgba(255, 165, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF4500.
-        /// </summary>
-        public static readonly TPixel OrangeRed = ColorBuilder<TPixel>.FromRgba(255, 69, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DA70D6.
-        /// </summary>
-        public static readonly TPixel Orchid = ColorBuilder<TPixel>.FromRgba(218, 112, 214, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #EEE8AA.
-        /// </summary>
-        public static readonly TPixel PaleGoldenrod = ColorBuilder<TPixel>.FromRgba(238, 232, 170, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #98FB98.
-        /// </summary>
-        public static readonly TPixel PaleGreen = ColorBuilder<TPixel>.FromRgba(152, 251, 152, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #AFEEEE.
-        /// </summary>
-        public static readonly TPixel PaleTurquoise = ColorBuilder<TPixel>.FromRgba(175, 238, 238, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DB7093.
-        /// </summary>
-        public static readonly TPixel PaleVioletRed = ColorBuilder<TPixel>.FromRgba(219, 112, 147, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFEFD5.
-        /// </summary>
-        public static readonly TPixel PapayaWhip = ColorBuilder<TPixel>.FromRgba(255, 239, 213, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFDAB9.
-        /// </summary>
-        public static readonly TPixel PeachPuff = ColorBuilder<TPixel>.FromRgba(255, 218, 185, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #CD853F.
-        /// </summary>
-        public static readonly TPixel Peru = ColorBuilder<TPixel>.FromRgba(205, 133, 63, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFC0CB.
-        /// </summary>
-        public static readonly TPixel Pink = ColorBuilder<TPixel>.FromRgba(255, 192, 203, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #DDA0DD.
-        /// </summary>
-        public static readonly TPixel Plum = ColorBuilder<TPixel>.FromRgba(221, 160, 221, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #B0E0E6.
-        /// </summary>
-        public static readonly TPixel PowderBlue = ColorBuilder<TPixel>.FromRgba(176, 224, 230, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #800080.
-        /// </summary>
-        public static readonly TPixel Purple = ColorBuilder<TPixel>.FromRgba(128, 0, 128, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #663399.
-        /// </summary>
-        public static readonly TPixel RebeccaPurple = ColorBuilder<TPixel>.FromRgba(102, 51, 153, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF0000.
-        /// </summary>
-        public static readonly TPixel Red = ColorBuilder<TPixel>.FromRgba(255, 0, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #BC8F8F.
-        /// </summary>
-        public static readonly TPixel RosyBrown = ColorBuilder<TPixel>.FromRgba(188, 143, 143, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4169E1.
-        /// </summary>
-        public static readonly TPixel RoyalBlue = ColorBuilder<TPixel>.FromRgba(65, 105, 225, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #8B4513.
-        /// </summary>
-        public static readonly TPixel SaddleBrown = ColorBuilder<TPixel>.FromRgba(139, 69, 19, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FA8072.
-        /// </summary>
-        public static readonly TPixel Salmon = ColorBuilder<TPixel>.FromRgba(250, 128, 114, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F4A460.
-        /// </summary>
-        public static readonly TPixel SandyBrown = ColorBuilder<TPixel>.FromRgba(244, 164, 96, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #2E8B57.
-        /// </summary>
-        public static readonly TPixel SeaGreen = ColorBuilder<TPixel>.FromRgba(46, 139, 87, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFF5EE.
-        /// </summary>
-        public static readonly TPixel SeaShell = ColorBuilder<TPixel>.FromRgba(255, 245, 238, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #A0522D.
-        /// </summary>
-        public static readonly TPixel Sienna = ColorBuilder<TPixel>.FromRgba(160, 82, 45, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #C0C0C0.
-        /// </summary>
-        public static readonly TPixel Silver = ColorBuilder<TPixel>.FromRgba(192, 192, 192, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #87CEEB.
-        /// </summary>
-        public static readonly TPixel SkyBlue = ColorBuilder<TPixel>.FromRgba(135, 206, 235, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #6A5ACD.
-        /// </summary>
-        public static readonly TPixel SlateBlue = ColorBuilder<TPixel>.FromRgba(106, 90, 205, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #708090.
-        /// </summary>
-        public static readonly TPixel SlateGray = ColorBuilder<TPixel>.FromRgba(112, 128, 144, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFAFA.
-        /// </summary>
-        public static readonly TPixel Snow = ColorBuilder<TPixel>.FromRgba(255, 250, 250, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #00FF7F.
-        /// </summary>
-        public static readonly TPixel SpringGreen = ColorBuilder<TPixel>.FromRgba(0, 255, 127, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #4682B4.
-        /// </summary>
-        public static readonly TPixel SteelBlue = ColorBuilder<TPixel>.FromRgba(70, 130, 180, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D2B48C.
-        /// </summary>
-        public static readonly TPixel Tan = ColorBuilder<TPixel>.FromRgba(210, 180, 140, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #008080.
-        /// </summary>
-        public static readonly TPixel Teal = ColorBuilder<TPixel>.FromRgba(0, 128, 128, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #D8BFD8.
-        /// </summary>
-        public static readonly TPixel Thistle = ColorBuilder<TPixel>.FromRgba(216, 191, 216, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FF6347.
-        /// </summary>
-        public static readonly TPixel Tomato = ColorBuilder<TPixel>.FromRgba(255, 99, 71, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFFF.
-        /// </summary>
-        public static readonly TPixel Transparent = ColorBuilder<TPixel>.FromRgba(255, 255, 255, 0);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #40E0D0.
-        /// </summary>
-        public static readonly TPixel Turquoise = ColorBuilder<TPixel>.FromRgba(64, 224, 208, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #EE82EE.
-        /// </summary>
-        public static readonly TPixel Violet = ColorBuilder<TPixel>.FromRgba(238, 130, 238, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5DEB3.
-        /// </summary>
-        public static readonly TPixel Wheat = ColorBuilder<TPixel>.FromRgba(245, 222, 179, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFFFF.
-        /// </summary>
-        public static readonly TPixel White = ColorBuilder<TPixel>.FromRgba(255, 255, 255, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #F5F5F5.
-        /// </summary>
-        public static readonly TPixel WhiteSmoke = ColorBuilder<TPixel>.FromRgba(245, 245, 245, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #FFFF00.
-        /// </summary>
-        public static readonly TPixel Yellow = ColorBuilder<TPixel>.FromRgba(255, 255, 0, 255);
-
-        /// <summary>
-        /// Represents a <see paramref="TPixel"/> matching the W3C definition that has an hex value of #9ACD32.
-        /// </summary>
-        public static readonly TPixel YellowGreen = ColorBuilder<TPixel>.FromRgba(154, 205, 50, 255);
-
-        /// <summary>
-        /// Gets a <see cref="T:TPixel[]"/> collection of web safe, colors as defined in the CSS Color Module Level 4.
-        /// </summary>
-        public static TPixel[] WebSafePalette => WebSafePaletteLazy.Value;
-
-        /// <summary>
-        /// Gets a <see cref="T:TPixel[]"/> collection of colors as defined in the original second edition of Werner’s Nomenclature of Colours 1821.
-        /// The hex codes were collected and defined by Nicholas Rougeux <see href="https://www.c82.net/werner"/>
-        /// </summary>
-        public static TPixel[] WernerPalette => WernerPaletteLazy.Value;
-
-        private static TPixel[] GetWebSafePalette() => GetPalette(ColorConstants.WebSafeColors);
-
-        private static TPixel[] GetWernerPalette() => GetPalette(ColorConstants.WernerColors);
-
-        private static TPixel[] GetPalette(Rgba32[] palette)
-        {
-            var converted = new TPixel[palette.Length];
-
-            Span<byte> constantsBytes = MemoryMarshal.Cast<Rgba32, byte>(palette.AsSpan());
-            PixelOperations<TPixel>.Instance.FromRgba32Bytes(
-                Configuration.Default,
-                constantsBytes,
-                converted,
-                palette.Length);
-
-            return converted;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
index c58d17ef42..b439ef32c9 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
@@ -1,6 +1,9 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+using System.Buffers.Binary;
+using System.Globalization;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -233,7 +236,20 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <returns>
         /// The <see cref="Rgba32"/>.
         /// </returns>
-        public static Rgba32 FromHex(string hex) => ColorBuilder<Rgba32>.FromHex(hex);
+        public static Rgba32 FromHex(string hex)
+        {
+            Guard.NotNullOrWhiteSpace(hex, nameof(hex));
+
+            hex = ToRgbaHex(hex);
+
+            if (hex is null || !uint.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out uint packedValue))
+            {
+                throw new ArgumentException("Hexadecimal string is not in the correct format.", nameof(hex));
+            }
+
+            packedValue = BinaryPrimitives.ReverseEndianness(packedValue);
+            return Unsafe.As<uint, Rgba32>(ref packedValue);
+        }
 
         /// <inheritdoc />
         public PixelOperations<Rgba32> CreatePixelOperations() => new PixelOperations();
@@ -426,5 +442,42 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.B = (byte)vector.Z;
             this.A = (byte)vector.W;
         }
+
+        /// <summary>
+        /// Converts the specified hex value to an rrggbbaa hex value.
+        /// </summary>
+        /// <param name="hex">The hex value to convert.</param>
+        /// <returns>
+        /// A rrggbbaa hex value.
+        /// </returns>
+        private static string ToRgbaHex(string hex)
+        {
+            if (hex[0] == '#')
+            {
+                hex = hex.Substring(1);
+            }
+
+            if (hex.Length == 8)
+            {
+                return hex;
+            }
+
+            if (hex.Length == 6)
+            {
+                return hex + "FF";
+            }
+
+            if (hex.Length < 3 || hex.Length > 4)
+            {
+                return null;
+            }
+
+            char r = hex[0];
+            char g = hex[1];
+            char b = hex[2];
+            char a = hex.Length == 3 ? 'F' : hex[3];
+
+            return new string(new[] { r, r, g, g, b, b, a, a });
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
index 96003cc5bf..38e75d1836 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.cs
@@ -94,7 +94,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <returns>
         /// The <see cref="RgbaVector"/>.
         /// </returns>
-        public static RgbaVector FromHex(string hex) => ColorBuilder<RgbaVector>.FromHex(hex);
+        public static RgbaVector FromHex(string hex) => Color.FromHex(hex).ToPixel<RgbaVector>();
 
         /// <inheritdoc />
         public PixelOperations<RgbaVector> CreatePixelOperations() => new PixelOperations();
diff --git a/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs b/src/ImageSharp/Processing/DefaultImageProcessorContext.cs
similarity index 85%
rename from src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs
rename to src/ImageSharp/Processing/DefaultImageProcessorContext.cs
index 091da003a2..d0c4c076f1 100644
--- a/src/ImageSharp/Processing/DefaultInternalImageProcessorContext.cs
+++ b/src/ImageSharp/Processing/DefaultImageProcessorContext.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Processing
     /// Performs processor application operations on the source image
     /// </summary>
     /// <typeparam name="TPixel">The pixel format</typeparam>
-    internal class DefaultInternalImageProcessorContext<TPixel> : IInternalImageProcessingContext<TPixel>
+    internal class DefaultImageProcessorContext<TPixel> : IInternalImageProcessingContext<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly bool mutate;
@@ -21,11 +21,11 @@ namespace SixLabors.ImageSharp.Processing
         private Image<TPixel> destination;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="DefaultInternalImageProcessorContext{TPixel}"/> class.
+        /// Initializes a new instance of the <see cref="DefaultImageProcessorContext{TPixel}"/> class.
         /// </summary>
         /// <param name="source">The image.</param>
         /// <param name="mutate">The mutate.</param>
-        public DefaultInternalImageProcessorContext(Image<TPixel> source, bool mutate)
+        public DefaultImageProcessorContext(Image<TPixel> source, bool mutate)
         {
             this.mutate = mutate;
             this.source = source;
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.Processing
         public MemoryAllocator MemoryAllocator => this.source.GetConfiguration().MemoryAllocator;
 
         /// <inheritdoc/>
-        public Image<TPixel> Apply()
+        public Image<TPixel> GetResultImage()
         {
             if (!this.mutate && this.destination is null)
             {
@@ -65,8 +65,7 @@ namespace SixLabors.ImageSharp.Processing
             return this.ApplyProcessor(processorImplementation);
         }
 
-        /// <inheritdoc/>
-        public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
+        private IImageProcessingContext ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
         {
             if (!this.mutate && this.destination is null)
             {
@@ -86,8 +85,7 @@ namespace SixLabors.ImageSharp.Processing
             return this;
         }
 
-        /// <inheritdoc/>
-        public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor)
+        private IImageProcessingContext ApplyProcessor(IImageProcessor<TPixel> processor)
         {
             return this.ApplyProcessor(processor, this.GetCurrentBounds());
         }
diff --git a/src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs b/src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs
index 7976daf25e..760102aacf 100644
--- a/src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs
+++ b/src/ImageSharp/Processing/Extensions/BinaryDiffuseExtensions.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image this method extends.</param>
         /// <param name="diffuser">The diffusion algorithm to apply.</param>
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDiffuse(
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDiffuse(
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDiffuse(
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
@@ -71,7 +71,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDiffuse(
             this IImageProcessingContext source,
             IErrorDiffuser diffuser,
diff --git a/src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs b/src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs
index b1e3d562ed..e8ce252a2d 100644
--- a/src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs
+++ b/src/ImageSharp/Processing/Extensions/BinaryDitherExtensions.cs
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.Processing
         /// </summary>
         /// <param name="source">The image this method extends.</param>
         /// <param name="dither">The ordered ditherer.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext
             BinaryDither(this IImageProcessingContext source, IOrderedDither dither) =>
             source.ApplyProcessor(new BinaryOrderedDitherProcessor(dither));
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="dither">The ordered ditherer.</param>
         /// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
         /// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDither(
             this IImageProcessingContext source,
             IOrderedDither dither,
@@ -46,7 +46,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDither(
             this IImageProcessingContext source,
             IOrderedDither dither,
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="rectangle">
         /// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
         /// </param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext BinaryDither(
             this IImageProcessingContext source,
             IOrderedDither dither,
diff --git a/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs b/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
index e469af18b8..2304a44c39 100644
--- a/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
+++ b/src/ImageSharp/Processing/Extensions/ProcessingExtensions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing.Processors;
@@ -13,18 +14,6 @@ namespace SixLabors.ImageSharp.Processing
     /// </summary>
     public static class ProcessingExtensions
     {
-        /// <summary>
-        /// Applies the given operation to the mutable image.
-        /// Useful when we need to extract information like Width/Height to parametrize the next operation working on the <see cref="IImageProcessingContext{TPixel}"/> chain.
-        /// To achieve this the method actually implements an "inline" <see cref="IImageProcessor{TPixel}"/> with <paramref name="operation"/> as it's processing logic.
-        /// </summary>
-        /// <typeparam name="TPixel">The pixel format.</typeparam>
-        /// <param name="source">The image to mutate.</param>
-        /// <param name="operation">The operation to perform on the source.</param>
-        /// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext<TPixel> Apply<TPixel>(this IImageProcessingContext<TPixel> source, Action<Image<TPixel>> operation)
-            where TPixel : struct, IPixel<TPixel> => source.ApplyProcessor(new DelegateProcessor<TPixel>(operation));
-
         /// <summary>
         /// Mutates the source image by applying the image operation to it.
         /// </summary>
@@ -48,9 +37,9 @@ namespace SixLabors.ImageSharp.Processing
             Guard.NotNull(operation, nameof(operation));
             Guard.NotNull(source, nameof(source));
 
-            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider.CreateImageProcessingContext(source, true);
+            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider
+                .CreateImageProcessingContext(source, true);
             operation(operationsRunner);
-            operationsRunner.Apply();
         }
 
         /// <summary>
@@ -65,9 +54,9 @@ namespace SixLabors.ImageSharp.Processing
             Guard.NotNull(operations, nameof(operations));
             Guard.NotNull(source, nameof(source));
 
-            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider.CreateImageProcessingContext(source, true);
+            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider
+                .CreateImageProcessingContext(source, true);
             operationsRunner.ApplyProcessors(operations);
-            operationsRunner.Apply();
         }
 
         /// <summary>
@@ -96,9 +85,10 @@ namespace SixLabors.ImageSharp.Processing
             Guard.NotNull(operation, nameof(operation));
             Guard.NotNull(source, nameof(source));
 
-            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider.CreateImageProcessingContext(source, false);
+            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider
+                .CreateImageProcessingContext(source, false);
             operation(operationsRunner);
-            return operationsRunner.Apply();
+            return operationsRunner.GetResultImage();
         }
 
         /// <summary>
@@ -114,9 +104,10 @@ namespace SixLabors.ImageSharp.Processing
             Guard.NotNull(operations, nameof(operations));
             Guard.NotNull(source, nameof(source));
 
-            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider.CreateImageProcessingContext(source, false);
+            IInternalImageProcessingContext<TPixel> operationsRunner = source.GetConfiguration().ImageOperationsProvider
+                .CreateImageProcessingContext(source, false);
             operationsRunner.ApplyProcessors(operations);
-            return operationsRunner.Apply();
+            return operationsRunner.GetResultImage();
         }
 
         /// <summary>
@@ -125,7 +116,9 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="source">The image processing context.</param>
         /// <param name="operations">The operations to perform on the source.</param>
         /// <returns>The <see cref="IImageProcessor{TPixel}"/> to allow chaining of operations.</returns>
-        public static IImageProcessingContext ApplyProcessors(this IImageProcessingContext source, params IImageProcessor[] operations)
+        public static IImageProcessingContext ApplyProcessors(
+            this IImageProcessingContext source,
+            params IImageProcessor[] operations)
         {
             foreach (IImageProcessor p in operations)
             {
@@ -155,7 +148,7 @@ namespace SixLabors.ImageSharp.Processing
                 IInternalImageProcessingContext<TPixel> operationsRunner = image.GetConfiguration()
                     .ImageOperationsProvider.CreateImageProcessingContext(image, this.mutate);
                 this.operation(operationsRunner);
-                this.ResultImage = operationsRunner.Apply();
+                this.ResultImage = operationsRunner.GetResultImage();
             }
         }
     }
diff --git a/src/ImageSharp/Processing/IImageProcessingContextFactory.cs b/src/ImageSharp/Processing/IImageProcessingContextFactory.cs
index 1ec2d191f3..948e70b445 100644
--- a/src/ImageSharp/Processing/IImageProcessingContextFactory.cs
+++ b/src/ImageSharp/Processing/IImageProcessingContextFactory.cs
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Processing
         public IInternalImageProcessingContext<TPixel> CreateImageProcessingContext<TPixel>(Image<TPixel> source, bool mutate)
             where TPixel : struct, IPixel<TPixel>
         {
-            return new DefaultInternalImageProcessorContext<TPixel>(source, mutate);
+            return new DefaultImageProcessorContext<TPixel>(source, mutate);
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs b/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
deleted file mode 100644
index b49cfe2151..0000000000
--- a/src/ImageSharp/Processing/IImageProcessingContext{TPixel}.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing.Processors;
-using SixLabors.Primitives;
-
-namespace SixLabors.ImageSharp.Processing
-{
-    /// <summary>
-    /// A pixel-specific interface to queue up image operations to apply to an image.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format</typeparam>
-    public interface IImageProcessingContext<TPixel> : IImageProcessingContext
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Adds the processor to the current set of image operations to be applied.
-        /// </summary>
-        /// <param name="processor">The processor to apply.</param>
-        /// <param name="rectangle">The area to apply it to.</param>
-        /// <returns>The current operations class to allow chaining of operations.</returns>
-        IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle);
-
-        /// <summary>
-        /// Adds the processor to the current set of image operations to be applied.
-        /// </summary>
-        /// <param name="processor">The processor to apply</param>
-        /// <returns>The current operations class to allow chaining of operations.</returns>
-        IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor);
-    }
-
-    /// <summary>
-    /// An internal interface to queue up image operations and have a method to apply them to and return a result
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format</typeparam>
-    internal interface IInternalImageProcessingContext<TPixel> : IImageProcessingContext<TPixel>
-       where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Adds the processors to the current image
-        /// </summary>
-        /// <returns>The current image or a new image depending on whether this is allowed to mutate the source image.</returns>
-        Image<TPixel> Apply();
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/IInternalImageProcessingContext.cs b/src/ImageSharp/Processing/IInternalImageProcessingContext.cs
new file mode 100644
index 0000000000..55303b1ef9
--- /dev/null
+++ b/src/ImageSharp/Processing/IInternalImageProcessingContext.cs
@@ -0,0 +1,22 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Processing
+{
+    /// <summary>
+    /// An interface for internal operations we don't want to expose on <see cref="IImageProcessingContext"/>.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel type.</typeparam>
+    internal interface IInternalImageProcessingContext<TPixel> : IImageProcessingContext
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <summary>
+        /// Returns the result image to return by <see cref="ProcessingExtensions.Clone"/>
+        /// (and other overloads).
+        /// </summary>
+        /// <returns>The current image or a new image depending on whether it is requested to mutate the source image.</returns>
+        Image<TPixel> GetResultImage();
+    }
+}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/DelegateProcessor.cs b/src/ImageSharp/Processing/Processors/DelegateProcessor.cs
deleted file mode 100644
index 7a9753d1a9..0000000000
--- a/src/ImageSharp/Processing/Processors/DelegateProcessor.cs
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
-
-namespace SixLabors.ImageSharp.Processing.Processors
-{
-    /// <summary>
-    /// Allows the application of processing algorithms to images via an action delegate
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class DelegateProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DelegateProcessor{TPixel}"/> class.
-        /// </summary>
-        /// <param name="action">The action.</param>
-        public DelegateProcessor(Action<Image<TPixel>> action)
-        {
-            this.Action = action;
-        }
-
-        /// <summary>
-        /// Gets the action that will be applied to the image.
-        /// </summary>
-        internal Action<Image<TPixel>> Action { get; }
-
-        /// <inheritdoc/>
-        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
-        {
-            this.Action?.Invoke(source);
-        }
-
-        /// <inheritdoc/>
-        protected override void OnFrameApply(ImageFrame<TPixel> source, Rectangle sourceRectangle, Configuration configuration)
-        {
-            // NOP, we did all we wanted to do inside BeforeImageApply
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/Processing/Processors/Dithering/AtkinsonDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/AtkinsonDiffuser.cs
index 17c97ddc9b..0461d179ff 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/AtkinsonDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/AtkinsonDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Atkinson image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class AtkinsonDiffuser : ErrorDiffuserBase
+    public sealed class AtkinsonDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/BurksDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/BurksDiffuser.cs
index 84455b24ad..23d4321e96 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/BurksDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/BurksDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Burks image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class BurksDiffuser : ErrorDiffuserBase
+    public sealed class BurksDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuser.cs
similarity index 96%
rename from src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
rename to src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuser.cs
index 327828c39e..1c8156bf51 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuserBase.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/ErrorDiffuser.cs
@@ -13,7 +13,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// <summary>
     /// The base class for performing error diffusion based dithering.
     /// </summary>
-    public abstract class ErrorDiffuserBase : IErrorDiffuser
+    public abstract class ErrorDiffuser : IErrorDiffuser
     {
         /// <summary>
         /// The vector to perform division.
@@ -41,11 +41,11 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
         private readonly DenseMatrix<float> matrix;
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="ErrorDiffuserBase"/> class.
+        /// Initializes a new instance of the <see cref="ErrorDiffuser"/> class.
         /// </summary>
         /// <param name="matrix">The dithering matrix.</param>
         /// <param name="divisor">The divisor.</param>
-        internal ErrorDiffuserBase(in DenseMatrix<float> matrix, byte divisor)
+        internal ErrorDiffuser(in DenseMatrix<float> matrix, byte divisor)
         {
             Guard.MustBeGreaterThan(divisor, 0, nameof(divisor));
 
diff --git a/src/ImageSharp/Processing/Processors/Dithering/FloydSteinbergDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/FloydSteinbergDiffuser.cs
index 6a7655b593..78a28a693a 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/FloydSteinbergDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/FloydSteinbergDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Floyd–Steinberg image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class FloydSteinbergDiffuser : ErrorDiffuserBase
+    public sealed class FloydSteinbergDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/JarvisJudiceNinkeDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/JarvisJudiceNinkeDiffuser.cs
index a69557d6de..64c8610833 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/JarvisJudiceNinkeDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/JarvisJudiceNinkeDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the JarvisJudiceNinke image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class JarvisJudiceNinkeDiffuser : ErrorDiffuserBase
+    public sealed class JarvisJudiceNinkeDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/Sierra2Diffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/Sierra2Diffuser.cs
index ebde2ceaf8..b489f8f28d 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/Sierra2Diffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/Sierra2Diffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Sierra2 image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class Sierra2Diffuser : ErrorDiffuserBase
+    public sealed class Sierra2Diffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/Sierra3Diffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/Sierra3Diffuser.cs
index 144a83a821..04abc782a6 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/Sierra3Diffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/Sierra3Diffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Sierra3 image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class Sierra3Diffuser : ErrorDiffuserBase
+    public sealed class Sierra3Diffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/SierraLiteDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/SierraLiteDiffuser.cs
index d71fba9f2e..2ac69cf456 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/SierraLiteDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/SierraLiteDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the SierraLite image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class SierraLiteDiffuser : ErrorDiffuserBase
+    public sealed class SierraLiteDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/StevensonArceDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/StevensonArceDiffuser.cs
index 4b1323065f..b929a28d30 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/StevensonArceDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/StevensonArceDiffuser.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// <summary>
     /// Applies error diffusion based dithering using the Stevenson-Arce image dithering algorithm.
     /// </summary>
-    public sealed class StevensonArceDiffuser : ErrorDiffuserBase
+    public sealed class StevensonArceDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Dithering/StuckiDiffuser.cs b/src/ImageSharp/Processing/Processors/Dithering/StuckiDiffuser.cs
index 1dd510a5ec..bb3aebc3f5 100644
--- a/src/ImageSharp/Processing/Processors/Dithering/StuckiDiffuser.cs
+++ b/src/ImageSharp/Processing/Processors/Dithering/StuckiDiffuser.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Dithering
     /// Applies error diffusion based dithering using the Stucki image dithering algorithm.
     /// <see href="http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT"/>
     /// </summary>
-    public sealed class StuckiDiffuser : ErrorDiffuserBase
+    public sealed class StuckiDiffuser : ErrorDiffuser
     {
         /// <summary>
         /// The diffusion matrix
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
index 5a043cb207..9625ca216e 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// Provides the base methods to perform affine transforms on an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AffineTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
+    internal class AffineTransformProcessor<TPixel> : TransformProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         public AffineTransformProcessor(AffineTransformProcessor definition)
diff --git a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
index 9bddda3825..4c4c27defa 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
@@ -16,7 +16,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// Provides methods to allow the cropping of an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class CropProcessor<TPixel> : TransformProcessorBase<TPixel>
+    internal class CropProcessor<TPixel> : TransformProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly CropProcessor definition;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
index ab07040f71..15d8141baa 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// Provides the base methods to perform non-affine transforms on an image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ProjectiveTransformProcessor<TPixel> : TransformProcessorBase<TPixel>
+    internal class ProjectiveTransformProcessor<TPixel> : TransformProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         private readonly ProjectiveTransformProcessor definition;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
index cf99f28dd7..fdd1d339dd 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// The original code has been adapted from <see href="http://www.realtimerendering.com/resources/GraphicsGems/gemsiii/filter_rcg.c"/>.
     /// </remarks>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class ResizeProcessor<TPixel> : TransformProcessorBase<TPixel>
+    internal class ResizeProcessor<TPixel> : TransformProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
         // The following fields are not immutable but are optionally created on demand.
diff --git a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
similarity index 89%
rename from src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs
rename to src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
index 286ada2e57..ef508549ac 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessorBase.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
     /// The base class for all transform processors. Any processor that changes the dimensions of the image should inherit from this.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal abstract class TransformProcessorBase<TPixel> : CloningImageProcessor<TPixel>
+    internal abstract class TransformProcessor<TPixel> : CloningImageProcessor<TPixel>
          where TPixel : struct, IPixel<TPixel>
     {
         /// <inheritdoc/>
diff --git a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
index 29f69cdd55..263ce6a7e4 100644
--- a/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
+++ b/tests/ImageSharp.Benchmarks/Samplers/Glow.cs
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.Benchmarks
         public void Setup()
         {
             this.bulk = new GlowProcessor(Color.Beige, 800 * .5f, GraphicsOptions.Default);
-            this.parallel = new GlowProcessorParallel<Rgba32>(NamedColors<Rgba32>.Beige) { Radius = 800 * .5f, };
+            this.parallel = new GlowProcessorParallel<Rgba32>(Color.Beige) { Radius = 800 * .5f, };
         }
 
         [Benchmark(Description = "ImageSharp Glow - Bulk")]
diff --git a/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs b/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
index 857c19d87f..d3de04354c 100644
--- a/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
+++ b/tests/ImageSharp.Tests/BaseImageOperationsExtensionTest.cs
@@ -11,7 +11,7 @@ namespace SixLabors.ImageSharp.Tests
 {
     public abstract class BaseImageOperationsExtensionTest
     {
-        protected readonly IImageProcessingContext<Rgba32> operations;
+        protected readonly IImageProcessingContext operations;
         private readonly FakeImageOperationsProvider.FakeImageOperations<Rgba32> internalOperations;
         protected readonly Rectangle rect;
         protected readonly GraphicsOptions options;
diff --git a/tests/ImageSharp.Tests/Colorspaces/Conversion/ApproximateColorspaceComparer.cs b/tests/ImageSharp.Tests/Colorspaces/Conversion/ApproximateColorspaceComparer.cs
index 57da2ff170..7bf84dd0af 100644
--- a/tests/ImageSharp.Tests/Colorspaces/Conversion/ApproximateColorspaceComparer.cs
+++ b/tests/ImageSharp.Tests/Colorspaces/Conversion/ApproximateColorspaceComparer.cs
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Conversion
         IEqualityComparer<CieXyChromaticityCoordinates>,
         IEqualityComparer<RgbPrimariesChromaticityCoordinates>,
         IEqualityComparer<GammaWorkingSpace>,
-        IEqualityComparer<RgbWorkingSpaceBase>
+        IEqualityComparer<RgbWorkingSpace>
     {
         private readonly float Epsilon;
 
@@ -222,14 +222,14 @@ namespace SixLabors.ImageSharp.Tests.Colorspaces.Conversion
         public int GetHashCode(GammaWorkingSpace obj) => obj.GetHashCode();
 
         /// <inheritdoc/>
-        public bool Equals(RgbWorkingSpaceBase x, RgbWorkingSpaceBase y)
+        public bool Equals(RgbWorkingSpace x, RgbWorkingSpace y)
         {
             return this.Equals(x.WhitePoint, y.WhitePoint)
                 && this.Equals(x.ChromaticityCoordinates, y.ChromaticityCoordinates);
         }
 
         /// <inheritdoc/>
-        public int GetHashCode(RgbWorkingSpaceBase obj) => obj.GetHashCode();
+        public int GetHashCode(RgbWorkingSpace obj) => obj.GetHashCode();
 
         private bool Equals(float x, float y)
         {
diff --git a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
index c91cb16d46..c3ae0cddff 100644
--- a/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
+++ b/tests/ImageSharp.Tests/FakeImageOperationsProvider.cs
@@ -57,7 +57,7 @@ namespace SixLabors.ImageSharp.Tests
 
             public MemoryAllocator MemoryAllocator => this.Source.GetConfiguration().MemoryAllocator;
 
-            public Image<TPixel> Apply()
+            public Image<TPixel> GetResultImage()
             {
                 return this.Source;
             }
@@ -86,25 +86,6 @@ namespace SixLabors.ImageSharp.Tests
                 return this;
             }
 
-            public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor, Rectangle rectangle)
-            {
-                this.Applied.Add(new AppliedOperation
-                {
-                    GenericProcessor = processor,
-                    Rectangle = rectangle
-                });
-                return this;
-            }
-
-            public IImageProcessingContext<TPixel> ApplyProcessor(IImageProcessor<TPixel> processor)
-            {
-                this.Applied.Add(new AppliedOperation
-                {
-                    GenericProcessor = processor
-                });
-                return this;
-            }
-
             public struct AppliedOperation
             {
                 public Rectangle? Rectangle { get; set; }
diff --git a/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs b/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
deleted file mode 100644
index 6dadc6e7a2..0000000000
--- a/tests/ImageSharp.Tests/Image/ImageProcessingContextTests.cs
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.Primitives;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    public class ImageProcessingContextTests
-    {
-        // [Fact]
-        // public void MutatedSizeIsAccuratePerOperation()
-        // {
-        //     var x500 = new Size(500, 500);
-        //     var x400 = new Size(400, 400);
-        //     var x300 = new Size(300, 300);
-        //     var x200 = new Size(200, 200);
-        //     var x100 = new Size(100, 100);
-        //     using (var image = new Image<Rgba32>(500, 500))
-        //     {
-        //         image.Mutate(x =>
-        //             x.AssertSize(x500)
-        //                 .Resize(x400).AssertSize(x400)
-        //                 .Resize(x300).AssertSize(x300)
-        //                 .Resize(x200).AssertSize(x200)
-        //                 .Resize(x100).AssertSize(x100));
-        //     }
-        // }
-        //
-        // [Fact]
-        // public void ClonedSizeIsAccuratePerOperation()
-        // {
-        //     var x500 = new Size(500, 500);
-        //     var x400 = new Size(400, 400);
-        //     var x300 = new Size(300, 300);
-        //     var x200 = new Size(200, 200);
-        //     var x100 = new Size(100, 100);
-        //     using (var image = new Image<Rgba32>(500, 500))
-        //     {
-        //         image.Clone(x =>
-        //             x.AssertSize(x500)
-        //                 .Resize(x400).AssertSize(x400)
-        //                 .Resize(x300).AssertSize(x300)
-        //                 .Resize(x200).AssertSize(x200)
-        //                 .Resize(x100).AssertSize(x100));
-        //     }
-        // }
-    }
-
-    public static class SizeAssertationExtensions
-    {
-        public static IImageProcessingContext<Rgba32> AssertSize(this IImageProcessingContext<Rgba32> context, Size size)
-        {
-            Assert.Equal(size, context.GetCurrentSize());
-            return context;
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs b/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
index d51470292d..ea99573141 100644
--- a/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
+++ b/tests/ImageSharp.Tests/Image/ImageTests.WrapMemory.cs
@@ -113,8 +113,8 @@ namespace SixLabors.ImageSharp.Tests
                     using (var memoryManager = new BitmapMemoryManager(bmp))
                     {
                         Memory<Bgra32> memory = memoryManager.Memory;
-                        Bgra32 bg = NamedColors<Bgra32>.Red;
-                        Bgra32 fg = NamedColors<Bgra32>.Green;
+                        Bgra32 bg = Color.Red;
+                        Bgra32 fg = Color.Green;
 
                         using (var image = Image.WrapMemory(memory, bmp.Width, bmp.Height))
                         {
@@ -144,8 +144,8 @@ namespace SixLabors.ImageSharp.Tests
                 using (var bmp = new Bitmap(51, 23))
                 {
                     var memoryManager = new BitmapMemoryManager(bmp);
-                    Bgra32 bg = NamedColors<Bgra32>.Red;
-                    Bgra32 fg = NamedColors<Bgra32>.Green;
+                    Bgra32 bg = Color.Red;
+                    Bgra32 fg = Color.Green;
 
                     using (var image = Image.WrapMemory(memoryManager, bmp.Width, bmp.Height))
                     {
diff --git a/tests/ImageSharp.Tests/PixelFormats/ColorBuilderTests.cs b/tests/ImageSharp.Tests/PixelFormats/ColorBuilderTests.cs
deleted file mode 100644
index e56cac2794..0000000000
--- a/tests/ImageSharp.Tests/PixelFormats/ColorBuilderTests.cs
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.PixelFormats;
-
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Colors
-{
-    public class ColorBuilderTests
-    {
-        [Fact]
-        public void ParseShortHex()
-        {
-            Assert.Equal(new Rgb24(255, 255, 255), ColorBuilder<Rgb24>.FromHex("#fff"));
-            Assert.Equal(new Rgb24(255, 255, 255), ColorBuilder<Rgb24>.FromHex("fff"));
-            Assert.Equal(new Rgba32(0, 0, 0, 255), ColorBuilder<Rgba32>.FromHex("000f"));
-        }
-
-        [Fact]
-        public void ParseHexLeadingPoundIsOptional()
-        {
-            Assert.Equal(new Rgb24(0, 128, 128), ColorBuilder<Rgb24>.FromHex("#008080"));
-            Assert.Equal(new Rgb24(0, 128, 128), ColorBuilder<Rgb24>.FromHex("008080"));
-        }
-
-        [Fact]
-        public void ParseHexThrowsOnEmpty()
-        {
-            Assert.Throws<ArgumentException>(() => ColorBuilder<Rgb24>.FromHex(""));
-        }
-
-        [Fact]
-        public void ParseHexThrowsOnNull()
-        {
-            Assert.Throws<ArgumentNullException>(() => ColorBuilder<Rgb24>.FromHex(null));
-        }
-    }
-}
diff --git a/tests/ImageSharp.Tests/PixelFormats/ColorDefinitionTests.cs b/tests/ImageSharp.Tests/PixelFormats/ColorDefinitionTests.cs
deleted file mode 100644
index 302e56ec71..0000000000
--- a/tests/ImageSharp.Tests/PixelFormats/ColorDefinitionTests.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
-using SixLabors.ImageSharp.PixelFormats;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    public class ColorDefinitionTests
-    {
-        public static TheoryData<string> ColorNames
-        {
-            get
-            {
-                var result = new TheoryData<string>();
-                foreach (string name in typeof(NamedColors<Rgba32>).GetTypeInfo()
-                    .GetFields().Where(x => x.Name != nameof(NamedColors<Rgba32>.WebSafePalette)).Select(x => x.Name))
-                {
-                    result.Add(name);
-                }
-                return result;
-            }
-        }
-
-        [Theory]
-        [MemberData(nameof(ColorNames))]
-        public void AllColorsAreOnGenericAndBaseColor(string name)
-        {
-            FieldInfo generic = typeof(NamedColors<Rgba32>).GetTypeInfo().GetField(name);
-            FieldInfo specific = typeof(Rgba32).GetTypeInfo().GetField(name);
-
-            Assert.NotNull(specific);
-            Assert.NotNull(generic);
-            Assert.True(specific.Attributes.HasFlag(FieldAttributes.Public), "specific must be public");
-            Assert.True(specific.Attributes.HasFlag(FieldAttributes.Static), "specific must be static");
-            Assert.True(generic.Attributes.HasFlag(FieldAttributes.Public), "generic must be public");
-            Assert.True(generic.Attributes.HasFlag(FieldAttributes.Static), "generic must be static");
-            Rgba32 expected = (Rgba32)generic.GetValue(null);
-            Rgba32 actual = (Rgba32)specific.GetValue(null);
-            Assert.Equal(expected, actual);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/DelegateTest.cs b/tests/ImageSharp.Tests/Processing/DelegateTest.cs
deleted file mode 100644
index 73d3c80230..0000000000
--- a/tests/ImageSharp.Tests/Processing/DelegateTest.cs
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests.Processing
-{
-    using SixLabors.ImageSharp.Processing.Processors;
-
-    public class DelegateTest : BaseImageOperationsExtensionTest
-    {
-        [Fact]
-        public void Run_CreatedDelegateProcessor()
-        {
-            Action<Image<Rgba32>> action = (i) => { };
-            this.operations.Apply(action);
-
-            DelegateProcessor<Rgba32> processor = this.Verify<DelegateProcessor<Rgba32>>();
-            Assert.Equal(action, processor.Action);
-        }
-    }
-}
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
index de203535c6..752f8e18bd 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/BasicTestPatternProvider.cs
@@ -31,9 +31,9 @@ namespace SixLabors.ImageSharp.Tests
             {
                 var result = new Image<TPixel>(this.Configuration, this.Width, this.Height);
 
-                TPixel topLeftColor = NamedColors<TPixel>.Red;
-                TPixel topRightColor = NamedColors<TPixel>.Green;
-                TPixel bottomLeftColor = NamedColors<TPixel>.Blue;
+                TPixel topLeftColor = Color.Red.ToPixel<TPixel>();
+                TPixel topRightColor = Color.Green.ToPixel<TPixel>();
+                TPixel bottomLeftColor = Color.Blue.ToPixel<TPixel>();
 
                 // Transparent purple:
                 TPixel bottomRightColor = default;
@@ -47,7 +47,7 @@ namespace SixLabors.ImageSharp.Tests
                     Span<TPixel> row = result.GetPixelRowSpan(y);
 
                     row.Slice(0, midX).Fill(topLeftColor);
-                    row.Slice(midX, this.Width-midX).Fill(topRightColor);
+                    row.Slice(midX, this.Width - midX).Fill(topRightColor);
                 }
 
                 for (int y = midY; y < this.Height; y++)
@@ -55,7 +55,7 @@ namespace SixLabors.ImageSharp.Tests
                     Span<TPixel> row = result.GetPixelRowSpan(y);
 
                     row.Slice(0, midX).Fill(bottomLeftColor);
-                    row.Slice(midX, this.Width-midX).Fill(bottomRightColor);
+                    row.Slice(midX, this.Width - midX).Fill(bottomRightColor);
                 }
 
                 return result;
diff --git a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
index 6df8c85016..94b2b33913 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ImageProviders/TestPatternProvider.cs
@@ -21,6 +21,16 @@ namespace SixLabors.ImageSharp.Tests
         {
             static readonly Dictionary<string, Image<TPixel>> TestImages = new Dictionary<string, Image<TPixel>>();
 
+            private static TPixel[] BlackWhitePixels = new[] {
+                                                                     Color.Black.ToPixel<TPixel>(),
+                                                                     Color.White.ToPixel<TPixel>()
+                                                                 };
+
+            private static TPixel[] PinkBluePixels = new[] {
+                                                                   Color.HotPink.ToPixel<TPixel>(),
+                                                                   Color.Blue.ToPixel<TPixel>()
+                                                               };
+
             public TestPatternProvider(int width, int height)
                 : base(width, height)
             {
@@ -80,12 +90,6 @@ namespace SixLabors.ImageSharp.Tests
                     stride = 1;
                 }
 
-                TPixel[] c =
-                {
-                    NamedColors<TPixel>.HotPink,
-                    NamedColors<TPixel>.Blue
-                };
-
                 for (int y = top; y < bottom; y++)
                 {
                     int p = 0;
@@ -94,9 +98,9 @@ namespace SixLabors.ImageSharp.Tests
                         if (x % stride == 0)
                         {
                             p++;
-                            p = p % c.Length;
+                            p = p % PinkBluePixels.Length;
                         }
-                        pixels[x, y] = c[p];
+                        pixels[x, y] = PinkBluePixels[p];
                     }
                 }
             }
@@ -113,11 +117,6 @@ namespace SixLabors.ImageSharp.Tests
                 int top = 0;
                 int bottom = pixels.Height / 2;
                 int stride = pixels.Width / 6;
-                TPixel[] c = 
-                {
-                    NamedColors<TPixel>.Black,
-                    NamedColors<TPixel>.White
-                };
 
                 int p = 0;
                 for (int y = top; y < bottom; y++)
@@ -125,7 +124,7 @@ namespace SixLabors.ImageSharp.Tests
                     if (y % stride == 0)
                     {
                         p++;
-                        p = p % c.Length;
+                        p = p % BlackWhitePixels.Length;
                     }
                     int pstart = p;
                     for (int x = left; x < right; x++)
@@ -133,9 +132,9 @@ namespace SixLabors.ImageSharp.Tests
                         if (x % stride == 0)
                         {
                             p++;
-                            p = p % c.Length;
+                            p = p % BlackWhitePixels.Length;
                         }
-                        pixels[x, y] = c[p];
+                        pixels[x, y] = BlackWhitePixels[p];
                     }
                     p = pstart;
                 }

From 561b0a619c0cbee4134af83bbf73f55d296f389a Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Sat, 25 May 2019 02:35:02 +0200
Subject: [PATCH 207/223] Fix for Issue #871 and #914 (#915)

---
 .../PixelFormats/PixelImplementations/Rgba32.cs     | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
index b439ef32c9..ba259ca8ed 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Rgba32.cs
@@ -136,13 +136,16 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// </summary>
         public Rgb24 Rgb
         {
-            // If this is changed to ShortMethod then several jpeg encoding tests fail
-            // on 32 bit Net 4.6.2 and NET 4.7.1
-            [MethodImpl(InliningOptions.ColdPath)]
-            get => Unsafe.As<Rgba32, Rgb24>(ref this);
+            [MethodImpl(InliningOptions.ShortMethod)]
+            get => new Rgb24(this.R, this.G, this.B);
 
             [MethodImpl(InliningOptions.ShortMethod)]
-            set => Unsafe.As<Rgba32, Rgb24>(ref this) = value;
+            set
+            {
+                this.R = value.R;
+                this.G = value.G;
+                this.B = value.B;
+            }
         }
 
         /// <summary>

From 5d3492201c78b4dd8fc409eeca9314713f85a393 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sat, 25 May 2019 22:43:14 +1000
Subject: [PATCH 208/223] Fix #466 (#916)

---
 .../Processing/Extensions/PadExtensions.cs    | 14 ++++++--
 .../Processors/Transforms/PadTest.cs          | 33 ++++++++++++++++---
 2 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/src/ImageSharp/Processing/Extensions/PadExtensions.cs b/src/ImageSharp/Processing/Extensions/PadExtensions.cs
index 29f80b43ff..270380084f 100644
--- a/src/ImageSharp/Processing/Extensions/PadExtensions.cs
+++ b/src/ImageSharp/Processing/Extensions/PadExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp.Processing
@@ -20,6 +19,17 @@ namespace SixLabors.ImageSharp.Processing
         /// <param name="height">The new height.</param>
         /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
         public static IImageProcessingContext Pad(this IImageProcessingContext source, int width, int height)
+            => source.Pad(width, height, default);
+
+        /// <summary>
+        /// Evenly pads an image to fit the new dimensions with the given background color.
+        /// </summary>
+        /// <param name="source">The source image to pad.</param>
+        /// <param name="width">The new width.</param>
+        /// <param name="height">The new height.</param>
+        /// <param name="color">The background color with which to pad the image.</param>
+        /// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
+        public static IImageProcessingContext Pad(this IImageProcessingContext source, int width, int height, Color color)
         {
             var options = new ResizeOptions
             {
@@ -28,7 +38,7 @@ namespace SixLabors.ImageSharp.Processing
                 Sampler = KnownResamplers.NearestNeighbor,
             };
 
-            return source.Resize(options);
+            return color.Equals(default) ? source.Resize(options) : source.Resize(options).BackgroundColor(color);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
index 750d67c32a..f568278706 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Transforms/PadTest.cs
@@ -10,10 +10,10 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
     public class PadTest
     {
         public static readonly string[] CommonTestImages =
-            {
-                TestImages.Png.CalliphoraPartial, TestImages.Png.Bike
-            };
-        
+        {
+            TestImages.Png.CalliphoraPartial, TestImages.Png.Bike
+        };
+
         [Theory]
         [WithFileCollection(nameof(CommonTestImages), PixelTypes.Rgba32)]
         public void ImageShouldPad<TPixel>(TestImageProvider<TPixel> provider)
@@ -29,7 +29,30 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 {
                     for (int x = 0; x < 25; x++)
                     {
-                        Assert.Equal(default(TPixel), image[x, y]);
+                        Assert.Equal(default, image[x, y]);
+                    }
+                }
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(CommonTestImages), PixelTypes.Rgba32)]
+        public void ImageShouldPadWithBackgroundColor<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Color color = Color.Red;
+            TPixel expected = color.ToPixel<TPixel>();
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Mutate(x => x.Pad(image.Width + 50, image.Height + 50, color));
+                image.DebugSave(provider);
+
+                // Check pixels are filled
+                for (int y = 0; y < 25; y++)
+                {
+                    for (int x = 0; x < 25; x++)
+                    {
+                        Assert.Equal(expected, image[x, y]);
                     }
                 }
             }

From c5319d1ba429a4791fa264811de61956561cefc3 Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@lemstra.org>
Date: Sat, 25 May 2019 23:24:44 +0200
Subject: [PATCH 209/223] Added funding file with a link to open collective.

---
 .github/FUNDING.yml | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .github/FUNDING.yml

diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000000..ee7a10862e
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+open_collective: imagesharp
\ No newline at end of file

From 35e2f78a32a8c4aceebf25d45a2750e12f0a9571 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Mon, 27 May 2019 20:55:15 +1000
Subject: [PATCH 210/223] Removes usage of linq in several critical paths
 (#918)

* Remove linq usage from jpeg + formatting

* png

* ICC + formattiing

* Resize

* Fix base class comparison.
---
 .../Components/Decoder/ProfileResolver.cs     |  8 ++--
 .../Formats/Jpeg/JpegDecoderCore.cs           |  3 +-
 .../Formats/Jpeg/JpegEncoderCore.cs           | 36 +++++++-------
 src/ImageSharp/Formats/Png/PngEncoderCore.cs  |  5 +-
 .../ICC/Curves/IccOneDimensionalCurve.cs      |  3 +-
 .../Profiles/ICC/Curves/IccResponseCurve.cs   |  8 +---
 .../DataWriter/IccDataWriter.TagDataEntry.cs  | 48 +++++--------------
 .../MetaData/Profiles/ICC/IccWriter.cs        |  1 +
 .../IccCurveSetProcessElement.cs              | 12 ++---
 .../IccChromaticityTagDataEntry.cs            | 12 ++---
 .../IccColorantTableTagDataEntry.cs           | 18 ++-----
 .../TagDataEntries/IccLut16TagDataEntry.cs    | 19 +++-----
 .../ICC/TagDataEntries/IccLut8TagDataEntry.cs | 14 ++----
 .../TagDataEntries/IccLutAToBTagDataEntry.cs  | 44 +++++++----------
 .../TagDataEntries/IccLutBToATagDataEntry.cs  | 37 +++++---------
 .../IccMultiLocalizedUnicodeTagDataEntry.cs   |  3 +-
 .../IccMultiProcessElementsTagDataEntry.cs    | 12 ++---
 .../IccNamedColor2TagDataEntry.cs             |  2 +-
 .../IccProfileSequenceDescTagDataEntry.cs     | 15 ++----
 .../IccResponseCurveSet16TagDataEntry.cs      | 12 ++---
 .../IccUInt64ArrayTagDataEntry.cs             | 16 ++-----
 .../MetaData/Profiles/ICC/Various/IccClut.cs  |  5 +-
 .../Profiles/ICC/Various/IccNamedColor.cs     | 20 ++------
 .../ICC/Various/IccProfileDescription.cs      | 18 +++----
 .../Various/IccProfileSequenceIdentifier.cs   | 10 ++--
 src/ImageSharp/Processing/ResizeOptions.cs    |  4 +-
 26 files changed, 122 insertions(+), 263 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
index abfd6f556c..54633a5d72 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ProfileResolver.cs
@@ -12,17 +12,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     internal static class ProfileResolver
     {
         /// <summary>
-        /// Describes the EXIF specific markers.
+        /// Describes the JFIF specific markers.
         /// </summary>
         public static readonly byte[] JFifMarker = Encoding.ASCII.GetBytes("JFIF\0");
 
         /// <summary>
-        /// Describes the EXIF specific markers.
+        /// Describes the ICC specific markers.
         /// </summary>
         public static readonly byte[] IccMarker = Encoding.ASCII.GetBytes("ICC_PROFILE\0");
 
         /// <summary>
-        /// Describes the ICC specific markers.
+        /// Describes the EXIF specific markers.
         /// </summary>
         public static readonly byte[] ExifMarker = Encoding.ASCII.GetBytes("Exif\0\0");
 
@@ -36,7 +36,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// </summary>
         /// <param name="bytesToCheck">The bytes to check.</param>
         /// <param name="profileIdentifier">The profile identifier.</param>
-        /// <returns>The <see cref="bool"/></returns>
+        /// <returns>The <see cref="bool"/>.</returns>
         public static bool IsProfile(ReadOnlySpan<byte> bytesToCheck, ReadOnlySpan<byte> profileIdentifier)
         {
             return bytesToCheck.Length >= profileIdentifier.Length
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index 8bd6514e04..fd0c289b88 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Buffers.Binary;
 using System.IO;
-using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Common.Helpers;
@@ -726,7 +725,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             this.InputStream.Read(this.temp, 0, length);
 
             // We only support 8-bit and 12-bit precision.
-            if (!this.supportedPrecisions.Contains(this.temp[0]))
+            if (Array.IndexOf(this.supportedPrecisions, this.temp[0]) == -1)
             {
                 JpegThrowHelper.ThrowImageFormatException("Only 8-Bit and 12-Bit precision supported.");
             }
diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index d4ce28107f..0b9eeb609b 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Buffers.Binary;
 using System.IO;
-using System.Linq;
 using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Common.Helpers;
 using SixLabors.ImageSharp.Formats.Jpeg.Components;
@@ -197,7 +196,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             Guard.NotNull(image, nameof(image));
             Guard.NotNull(stream, nameof(stream));
 
-            ushort max = JpegConstants.MaxLength;
+            const ushort max = JpegConstants.MaxLength;
             if (image.Width >= max || image.Height >= max)
             {
                 throw new ImageFormatException($"Image is too large to encode at {image.Width}x{image.Height}.");
@@ -226,7 +225,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             InitQuantizationTable(1, scale, ref this.chrominanceQuantTable);
 
             // Compute number of components based on input image type.
-            int componentCount = 3;
+            const int componentCount = 3;
 
             // Write the Start Of Image marker.
             this.WriteApplicationHeader(metadata);
@@ -278,7 +277,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         private static void InitQuantizationTable(int i, int scale, ref Block8x8F quant)
         {
             DebugGuard.MustBeBetweenOrEqualTo(i, 0, 1, nameof(i));
-            var unscaledQuant = (i == 0) ? UnscaledQuant_Luminance : UnscaledQuant_Chrominance;
+            ReadOnlySpan<byte> unscaledQuant = (i == 0) ? UnscaledQuant_Luminance : UnscaledQuant_Chrominance;
 
             for (int j = 0; j < Block8x8F.Size; j++)
             {
@@ -653,8 +652,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 return;
             }
 
-            const int MaxBytesApp1 = 65533;
-            const int MaxBytesWithExifId = 65527;
+            const int MaxBytesApp1 = 65533; // 64k - 2 padding bytes
+            const int MaxBytesWithExifId = 65527; // Max - 6 bytes for EXIF header.
 
             byte[] data = exifProfile?.ToByteArray();
 
@@ -663,31 +662,30 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                 return;
             }
 
-            data = ProfileResolver.ExifMarker.Concat(data).ToArray();
-
-            int remaining = data.Length;
+            // We can write up to a maximum of 64 data to the initial marker so calculate boundaries.
+            int exifMarkerLength = ProfileResolver.ExifMarker.Length;
+            int remaining = exifMarkerLength + data.Length;
             int bytesToWrite = remaining > MaxBytesApp1 ? MaxBytesApp1 : remaining;
             int app1Length = bytesToWrite + 2;
 
+            // Write the app marker, EXIF marker, and data
             this.WriteApp1Header(app1Length);
-
-            // write the exif data
-            this.outputStream.Write(data, 0, bytesToWrite);
+            this.outputStream.Write(ProfileResolver.ExifMarker);
+            this.outputStream.Write(data, 0, bytesToWrite - exifMarkerLength);
             remaining -= bytesToWrite;
 
-            // if the exif data exceeds 64K, write it in multiple APP1 Markers
-            for (int idx = MaxBytesApp1; idx < data.Length; idx += MaxBytesWithExifId)
+            // If the exif data exceeds 64K, write it in multiple APP1 Markers
+            for (int idx = MaxBytesWithExifId; idx < data.Length; idx += MaxBytesWithExifId)
             {
                 bytesToWrite = remaining > MaxBytesWithExifId ? MaxBytesWithExifId : remaining;
-                app1Length = bytesToWrite + 2 + 6;
+                app1Length = bytesToWrite + 2 + exifMarkerLength;
 
                 this.WriteApp1Header(app1Length);
 
-                // write Exif00 marker
-                ProfileResolver.ExifMarker.AsSpan().CopyTo(this.buffer.AsSpan());
-                this.outputStream.Write(this.buffer, 0, 6);
+                // Write Exif00 marker
+                this.outputStream.Write(ProfileResolver.ExifMarker);
 
-                // write the exif data
+                // Write the exif data
                 this.outputStream.Write(data, idx, bytesToWrite);
 
                 remaining -= bytesToWrite;
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index cbc35f3c3e..def57c3b0e 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -6,7 +6,6 @@ using System.Buffers;
 using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Advanced;
@@ -231,7 +230,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             if (this.pngColorType == PngColorType.Palette)
             {
                 byte bits = (byte)this.pngBitDepth;
-                if (!ColorTypes[this.pngColorType.Value].Contains(bits))
+                if (Array.IndexOf(ColorTypes[this.pngColorType.Value], bits) == -1)
                 {
                     throw new NotSupportedException("Bit depth is not supported or not valid.");
                 }
@@ -268,7 +267,7 @@ namespace SixLabors.ImageSharp.Formats.Png
             else
             {
                 this.bitDepth = (byte)this.pngBitDepth;
-                if (!ColorTypes[this.pngColorType.Value].Contains(this.bitDepth))
+                if (Array.IndexOf(ColorTypes[this.pngColorType.Value], this.bitDepth) == -1)
                 {
                     throw new NotSupportedException("Bit depth is not supported or not valid.");
                 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
index e1d362a7fe..cbb433012d 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -52,7 +51,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             }
 
             return this.BreakPoints.AsSpan().SequenceEqual(other.BreakPoints)
-                && this.Segments.SequenceEqual(other.Segments);
+                && this.Segments.AsSpan().SequenceEqual(other.Segments);
         }
     }
 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
index 4f0345d352..b9a50acd47 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 using System.Numerics;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
@@ -65,10 +64,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         }
 
         /// <inheritdoc />
-        public override bool Equals(object obj)
-        {
-            return obj is IccResponseCurve other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccResponseCurve other && this.Equals(other);
 
         /// <inheritdoc />
         public override int GetHashCode()
@@ -88,7 +84,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
             for (int i = 0; i < this.ResponseArrays.Length; i++)
             {
-                if (!this.ResponseArrays[i].SequenceEqual(other.ResponseArrays[i]))
+                if (!this.ResponseArrays[i].AsSpan().SequenceEqual(other.ResponseArrays[i]))
                 {
                     return false;
                 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
index 13fb023d38..f3c632a869 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/DataWriter/IccDataWriter.TagDataEntry.cs
@@ -163,10 +163,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteUnknownTagDataEntry(IccUnknownTagDataEntry value)
-        {
-            return this.WriteArray(value.Data);
-        }
+        public int WriteUnknownTagDataEntry(IccUnknownTagDataEntry value) => this.WriteArray(value.Data);
 
         /// <summary>
         /// Writes a <see cref="IccChromaticityTagDataEntry"/>
@@ -269,10 +266,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteDateTimeTagDataEntry(IccDateTimeTagDataEntry value)
-        {
-            return this.WriteDateTime(value.Value);
-        }
+        public int WriteDateTimeTagDataEntry(IccDateTimeTagDataEntry value) => this.WriteDateTime(value.Value);
 
         /// <summary>
         /// Writes a <see cref="IccLut16TagDataEntry"/>
@@ -563,6 +557,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             long tpos = this.dataStream.Position;
             this.dataStream.Position += cultureCount * 12;
 
+            // TODO: Investigate cost of Linq GroupBy
             IGrouping<string, IccLocalizedString>[] texts = value.Texts.GroupBy(t => t.Text).ToArray();
 
             uint[] offset = new uint[texts.Length];
@@ -625,7 +620,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             long tpos = this.dataStream.Position;
             this.dataStream.Position += value.Data.Length * 8;
 
-            IccPositionNumber[] posTable = new IccPositionNumber[value.Data.Length];
+            var posTable = new IccPositionNumber[value.Data.Length];
             for (int i = 0; i < value.Data.Length; i++)
             {
                 uint offset = (uint)(this.dataStream.Position - start);
@@ -673,10 +668,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteParametricCurveTagDataEntry(IccParametricCurveTagDataEntry value)
-        {
-            return this.WriteParametricCurve(value.Curve);
-        }
+        public int WriteParametricCurveTagDataEntry(IccParametricCurveTagDataEntry value) => this.WriteParametricCurve(value.Curve);
 
         /// <summary>
         /// Writes a <see cref="IccProfileSequenceDescTagDataEntry"/>
@@ -793,20 +785,14 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteSignatureTagDataEntry(IccSignatureTagDataEntry value)
-        {
-            return this.WriteAsciiString(value.SignatureData, 4, false);
-        }
+        public int WriteSignatureTagDataEntry(IccSignatureTagDataEntry value) => this.WriteAsciiString(value.SignatureData, 4, false);
 
         /// <summary>
         /// Writes a <see cref="IccTextTagDataEntry"/>
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteTextTagDataEntry(IccTextTagDataEntry value)
-        {
-            return this.WriteAsciiString(value.Text);
-        }
+        public int WriteTextTagDataEntry(IccTextTagDataEntry value) => this.WriteAsciiString(value.Text);
 
         /// <summary>
         /// Writes a <see cref="IccUFix16ArrayTagDataEntry"/>
@@ -829,40 +815,28 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteUInt16ArrayTagDataEntry(IccUInt16ArrayTagDataEntry value)
-        {
-            return this.WriteArray(value.Data);
-        }
+        public int WriteUInt16ArrayTagDataEntry(IccUInt16ArrayTagDataEntry value) => this.WriteArray(value.Data);
 
         /// <summary>
         /// Writes a <see cref="IccUInt32ArrayTagDataEntry"/>
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteUInt32ArrayTagDataEntry(IccUInt32ArrayTagDataEntry value)
-        {
-            return this.WriteArray(value.Data);
-        }
+        public int WriteUInt32ArrayTagDataEntry(IccUInt32ArrayTagDataEntry value) => this.WriteArray(value.Data);
 
         /// <summary>
         /// Writes a <see cref="IccUInt64ArrayTagDataEntry"/>
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteUInt64ArrayTagDataEntry(IccUInt64ArrayTagDataEntry value)
-        {
-            return this.WriteArray(value.Data);
-        }
+        public int WriteUInt64ArrayTagDataEntry(IccUInt64ArrayTagDataEntry value) => this.WriteArray(value.Data);
 
         /// <summary>
         /// Writes a <see cref="IccUInt8ArrayTagDataEntry"/>
         /// </summary>
         /// <param name="value">The entry to write</param>
         /// <returns>The number of bytes written</returns>
-        public int WriteUInt8ArrayTagDataEntry(IccUInt8ArrayTagDataEntry value)
-        {
-            return this.WriteArray(value.Data);
-        }
+        public int WriteUInt8ArrayTagDataEntry(IccUInt8ArrayTagDataEntry value) => this.WriteArray(value.Data);
 
         /// <summary>
         /// Writes a <see cref="IccViewingConditionsTagDataEntry"/>
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs b/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
index b5a7c830dd..186f06df05 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/IccWriter.cs
@@ -70,6 +70,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
         private IccTagTableEntry[] WriteTagData(IccDataWriter writer, IccTagDataEntry[] entries)
         {
+            // TODO: Investigate cost of Linq GroupBy
             IEnumerable<IGrouping<IccTagDataEntry, IccTagDataEntry>> grouped = entries.GroupBy(t => t);
 
             // (Header size) + (entry count) + (nr of entries) * (size of table entry)
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
index d72aff3c92..c6409e3c1d 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -17,9 +16,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <param name="curves">An array with one dimensional curves</param>
         public IccCurveSetProcessElement(IccOneDimensionalCurve[] curves)
             : base(IccMultiProcessElementSignature.CurveSet, curves?.Length ?? 1, curves?.Length ?? 1)
-        {
-            this.Curves = curves ?? throw new ArgumentNullException(nameof(curves));
-        }
+            => this.Curves = curves ?? throw new ArgumentNullException(nameof(curves));
 
         /// <summary>
         /// Gets an array of one dimensional curves
@@ -31,16 +28,13 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         {
             if (base.Equals(other) && other is IccCurveSetProcessElement element)
             {
-                return this.Curves.SequenceEqual(element.Curves);
+                return this.Curves.AsSpan().SequenceEqual(element.Curves);
             }
 
             return false;
         }
 
         /// <inheritdoc />
-        public bool Equals(IccCurveSetProcessElement other)
-        {
-            return this.Equals((IccMultiProcessElement)other);
-        }
+        public bool Equals(IccCurveSetProcessElement other) => this.Equals((IccMultiProcessElement)other);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
index b4d711f59e..813271d48b 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
@@ -80,10 +80,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public double[][] ChannelValues { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccChromaticityTagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccChromaticityTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccChromaticityTagDataEntry other)
@@ -102,10 +99,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccChromaticityTagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccChromaticityTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
@@ -162,7 +156,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
             for (int i = 0; i < this.ChannelValues.Length; i++)
             {
-                if (!this.ChannelValues[i].SequenceEqual(entry.ChannelValues[i]))
+                if (!this.ChannelValues[i].AsSpan().SequenceEqual(entry.ChannelValues[i]))
                 {
                     return false;
                 }
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
index 28d01450c1..aff33ff828 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -42,10 +41,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccColorantTableEntry[] ColorantData { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccColorantTableTagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccColorantTableTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccColorantTableTagDataEntry other)
@@ -60,19 +56,13 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 return true;
             }
 
-            return base.Equals(other) && this.ColorantData.SequenceEqual(other.ColorantData);
+            return base.Equals(other) && this.ColorantData.AsSpan().SequenceEqual(other.ColorantData);
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccColorantTableTagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccColorantTableTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
-        public override int GetHashCode()
-        {
-            return HashCode.Combine(this.Signature, this.ColorantData);
-        }
+        public override int GetHashCode() => HashCode.Combine(this.Signature, this.ColorantData);
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
index d84fc1431e..8f7db49ad0 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 using System.Numerics;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
@@ -71,7 +70,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
             Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
 
-            this.Matrix = this.CreateMatrix(matrix);
+            this.Matrix = CreateMatrix(matrix);
             this.InputValues = inputValues ?? throw new ArgumentNullException(nameof(inputValues));
             this.ClutValues = clutValues ?? throw new ArgumentNullException(nameof(clutValues));
             this.OutputValues = outputValues ?? throw new ArgumentNullException(nameof(outputValues));
@@ -111,10 +110,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccLut[] OutputValues { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccLut16TagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccLut16TagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccLut16TagDataEntry other)
@@ -131,16 +127,13 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
             return base.Equals(other)
                 && this.Matrix.Equals(other.Matrix)
-                && this.InputValues.SequenceEqual(other.InputValues)
+                && this.InputValues.AsSpan().SequenceEqual(other.InputValues)
                 && this.ClutValues.Equals(other.ClutValues)
-                && this.OutputValues.SequenceEqual(other.OutputValues);
+                && this.OutputValues.AsSpan().SequenceEqual(other.OutputValues);
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccLut16TagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccLut16TagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
@@ -153,7 +146,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 this.OutputValues);
         }
 
-        private Matrix4x4 CreateMatrix(float[,] matrix)
+        private static Matrix4x4 CreateMatrix(float[,] matrix)
         {
             return new Matrix4x4(
                 matrix[0, 0],
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
index 5c8ce2d2c9..3a1859a1c3 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
@@ -114,10 +114,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccLut[] OutputValues { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccLut8TagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccLut8TagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccLut8TagDataEntry other)
@@ -134,16 +131,13 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
             return base.Equals(other)
                 && this.Matrix.Equals(other.Matrix)
-                && this.InputValues.SequenceEqual(other.InputValues)
+                && this.InputValues.AsSpan().SequenceEqual(other.InputValues)
                 && this.ClutValues.Equals(other.ClutValues)
-                && this.OutputValues.SequenceEqual(other.OutputValues);
+                && this.OutputValues.AsSpan().SequenceEqual(other.OutputValues);
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccLut8TagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccLut8TagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
index 4cee555e51..88e3c4cae2 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs
@@ -5,6 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
+// TODO: Review the use of base IccTagDataEntry comparison.
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
@@ -15,12 +16,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLutAToBTagDataEntry"/> class.
         /// </summary>
-        /// <param name="curveA">A Curve</param>
-        /// <param name="clutValues">CLUT</param>
-        /// <param name="curveM">M Curve</param>
+        /// <param name="curveB">B Curve</param>
         /// <param name="matrix3x3">Two dimensional conversion matrix (3x3)</param>
         /// <param name="matrix3x1">One dimensional conversion matrix (3x1)</param>
-        /// <param name="curveB">B Curve</param>
+        /// <param name="curveM">M Curve</param>
+        /// <param name="clutValues">CLUT</param>
+        /// <param name="curveA">A Curve</param>
         public IccLutAToBTagDataEntry(
             IccTagDataEntry[] curveB,
             float[,] matrix3x3,
@@ -35,12 +36,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLutAToBTagDataEntry"/> class.
         /// </summary>
-        /// <param name="curveA">A Curve</param>
-        /// <param name="clutValues">CLUT</param>
-        /// <param name="curveM">M Curve</param>
+        /// <param name="curveB">B Curve</param>
         /// <param name="matrix3x3">Two dimensional conversion matrix (3x3)</param>
         /// <param name="matrix3x1">One dimensional conversion matrix (3x1)</param>
-        /// <param name="curveB">B Curve</param>
+        /// <param name="curveM">M Curve</param>
+        /// <param name="clutValues">CLUT</param>
+        /// <param name="curveA">A Curve</param>
         /// <param name="tagSignature">Tag Signature</param>
         public IccLutAToBTagDataEntry(
             IccTagDataEntry[] curveB,
@@ -145,10 +146,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccTagDataEntry[] CurveA { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccLutAToBTagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccLutAToBTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccLutAToBTagDataEntry other)
@@ -169,23 +167,18 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 && this.Matrix3x3.Equals(other.Matrix3x3)
                 && this.Matrix3x1.Equals(other.Matrix3x1)
                 && this.ClutValues.Equals(other.ClutValues)
-                && this.EqualsCurve(this.CurveB, other.CurveB)
-                && this.EqualsCurve(this.CurveM, other.CurveM)
-                && this.EqualsCurve(this.CurveA, other.CurveA);
+                && EqualsCurve(this.CurveB, other.CurveB)
+                && EqualsCurve(this.CurveM, other.CurveM)
+                && EqualsCurve(this.CurveA, other.CurveA);
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccLutAToBTagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccLutAToBTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-#pragma warning disable SA1129 // Do not use default value type constructor
-            var hashCode = new HashCode();
-#pragma warning restore SA1129 // Do not use default value type constructor
+            HashCode hashCode = default;
 
             hashCode.Add(this.Signature);
             hashCode.Add(this.InputChannelCount);
@@ -200,7 +193,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             return hashCode.ToHashCode();
         }
 
-        private bool EqualsCurve(IccTagDataEntry[] thisCurves, IccTagDataEntry[] entryCurves)
+        private static bool EqualsCurve(IccTagDataEntry[] thisCurves, IccTagDataEntry[] entryCurves)
         {
             bool thisNull = thisCurves is null;
             bool entryNull = entryCurves is null;
@@ -243,10 +236,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 && this.CurveA != null;
         }
 
-        private bool IsB()
-        {
-            return this.CurveB != null;
-        }
+        private bool IsB() => this.CurveB != null;
 
         private void VerifyCurve(IccTagDataEntry[] curves, string name)
         {
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
index 8e9479ff83..f8bf3f0423 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs
@@ -5,6 +5,7 @@ using System;
 using System.Linq;
 using System.Numerics;
 
+// TODO: Review the use of base IccTagDataEntry comparison.
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
     /// <summary>
@@ -15,12 +16,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLutBToATagDataEntry"/> class.
         /// </summary>
-        /// <param name="curveA">A Curve</param>
-        /// <param name="clutValues">CLUT</param>
-        /// <param name="curveM">M Curve</param>
+        /// <param name="curveB">B Curve</param>
         /// <param name="matrix3x3">Two dimensional conversion matrix (3x3)</param>
         /// <param name="matrix3x1">One dimensional conversion matrix (3x1)</param>
-        /// <param name="curveB">B Curve</param>
+        /// <param name="curveM">M Curve</param>
+        /// <param name="clutValues">CLUT</param>
+        /// <param name="curveA">A Curve</param>
         public IccLutBToATagDataEntry(
             IccTagDataEntry[] curveB,
             float[,] matrix3x3,
@@ -35,12 +36,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <summary>
         /// Initializes a new instance of the <see cref="IccLutBToATagDataEntry"/> class.
         /// </summary>
-        /// <param name="curveA">A Curve</param>
-        /// <param name="clutValues">CLUT</param>
-        /// <param name="curveM">M Curve</param>
+        /// <param name="curveB">B Curve</param>
         /// <param name="matrix3x3">Two dimensional conversion matrix (3x3)</param>
         /// <param name="matrix3x1">One dimensional conversion matrix (3x1)</param>
-        /// <param name="curveB">B Curve</param>
+        /// <param name="curveM">M Curve</param>
+        /// <param name="clutValues">CLUT</param>
+        /// <param name="curveA">A Curve</param>
         /// <param name="tagSignature">Tag Signature</param>
         public IccLutBToATagDataEntry(
             IccTagDataEntry[] curveB,
@@ -145,10 +146,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccTagDataEntry[] CurveA { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccLutBToATagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccLutBToATagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccLutBToATagDataEntry other)
@@ -175,18 +173,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccLutBToATagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccLutBToATagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-#pragma warning disable SA1129 // Do not use default value type constructor
-            var hashCode = new HashCode();
-#pragma warning restore SA1129 // Do not use default value type constructor
-
+            HashCode hashCode = default;
             hashCode.Add(this.Signature);
             hashCode.Add(this.InputChannelCount);
             hashCode.Add(this.OutputChannelCount);
@@ -243,10 +235,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 && this.CurveA != null;
         }
 
-        private bool IsB()
-        {
-            return this.CurveB != null;
-        }
+        private bool IsB() => this.CurveB != null;
 
         private void VerifyCurve(IccTagDataEntry[] curves, string name)
         {
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
index 3084ff6121..34a027126f 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -56,7 +55,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 return true;
             }
 
-            return base.Equals(other) && this.Texts.SequenceEqual(other.Texts);
+            return base.Equals(other) && this.Texts.AsSpan().SequenceEqual(other.Texts);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
index dc78e75200..f2713e8cee 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
@@ -57,10 +57,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
-        {
-            var entry = other as IccMultiProcessElementsTagDataEntry;
-            return entry != null && this.Equals(entry);
-        }
+            => other is IccMultiProcessElementsTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccMultiProcessElementsTagDataEntry other)
@@ -78,14 +75,11 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
             return base.Equals(other)
                 && this.InputChannelCount == other.InputChannelCount
                 && this.OutputChannelCount == other.OutputChannelCount
-                && this.Data.SequenceEqual(other.Data);
+                && this.Data.AsSpan().SequenceEqual(other.Data);
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccMultiProcessElementsTagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccMultiProcessElementsTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
index 30516578fe..4fd0cfcfb6 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
@@ -143,7 +143,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 && string.Equals(this.Prefix, other.Prefix)
                 && string.Equals(this.Suffix, other.Suffix)
                 && this.VendorFlags == other.VendorFlags
-                && this.Colors.SequenceEqual(other.Colors);
+                && this.Colors.AsSpan().SequenceEqual(other.Colors);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
index 3c3a6c7619..7897c394f1 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -29,9 +28,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <param name="tagSignature">Tag Signature</param>
         public IccProfileSequenceDescTagDataEntry(IccProfileDescription[] descriptions, IccProfileTag tagSignature)
             : base(IccTypeSignature.ProfileSequenceDesc, tagSignature)
-        {
-            this.Descriptions = descriptions ?? throw new ArgumentNullException(nameof(descriptions));
-        }
+            => this.Descriptions = descriptions ?? throw new ArgumentNullException(nameof(descriptions));
 
         /// <summary>
         /// Gets the profile descriptions
@@ -40,9 +37,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccProfileSequenceDescTagDataEntry entry && this.Equals(entry);
-        }
+            => other is IccProfileSequenceDescTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc />
         public bool Equals(IccProfileSequenceDescTagDataEntry other)
@@ -57,14 +52,12 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
                 return true;
             }
 
-            return base.Equals(other) && this.Descriptions.SequenceEqual(other.Descriptions);
+            return base.Equals(other) && this.Descriptions.AsSpan().SequenceEqual(other.Descriptions);
         }
 
         /// <inheritdoc/>
         public override bool Equals(object obj)
-        {
-            return obj is IccProfileSequenceDescTagDataEntry other && this.Equals(other);
-        }
+            => obj is IccProfileSequenceDescTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc />
         public override int GetHashCode() => HashCode.Combine(this.Signature, this.Descriptions);
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
index 6051bf8414..e9c8af9be2 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
@@ -51,10 +51,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public IccResponseCurve[] Curves { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccResponseCurveSet16TagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccResponseCurveSet16TagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc />
         public bool Equals(IccResponseCurveSet16TagDataEntry other)
@@ -71,14 +68,11 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
             return base.Equals(other)
                 && this.ChannelCount == other.ChannelCount
-                && this.Curves.SequenceEqual(other.Curves);
+                && this.Curves.AsSpan().SequenceEqual(other.Curves);
         }
 
         /// <inheritdoc />
-        public override bool Equals(object obj)
-        {
-            return obj is IccResponseCurveSet16TagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccResponseCurveSet16TagDataEntry other && this.Equals(other);
 
         /// <inheritdoc />
         public override int GetHashCode()
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
index 053181a26f..09bec9b7a5 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -26,10 +25,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <param name="data">The array data</param>
         /// <param name="tagSignature">Tag Signature</param>
         public IccUInt64ArrayTagDataEntry(ulong[] data, IccProfileTag tagSignature)
-            : base(IccTypeSignature.UInt64Array, tagSignature)
-        {
-            this.Data = data ?? throw new ArgumentNullException(nameof(data));
-        }
+            : base(IccTypeSignature.UInt64Array, tagSignature) => this.Data = data ?? throw new ArgumentNullException(nameof(data));
 
         /// <summary>
         /// Gets the array data
@@ -37,10 +33,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         public ulong[] Data { get; }
 
         /// <inheritdoc/>
-        public override bool Equals(IccTagDataEntry other)
-        {
-            return other is IccUInt64ArrayTagDataEntry entry && this.Equals(entry);
-        }
+        public override bool Equals(IccTagDataEntry other) => other is IccUInt64ArrayTagDataEntry entry && this.Equals(entry);
 
         /// <inheritdoc/>
         public bool Equals(IccUInt64ArrayTagDataEntry other)
@@ -59,10 +52,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccUInt64ArrayTagDataEntry other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccUInt64ArrayTagDataEntry other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode() => HashCode.Combine(this.Signature, this.Data);
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
index c53ba95201..bd8f784ae7 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs
@@ -134,10 +134,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccClut other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccClut other && this.Equals(other);
 
         /// <inheritdoc/>
         public override int GetHashCode()
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
index 22bf1bb762..3c640ab036 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccNamedColor.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -55,10 +54,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <returns>
         /// True if the <paramref name="left"/> parameter is equal to the <paramref name="right"/> parameter; otherwise, false.
         /// </returns>
-        public static bool operator ==(IccNamedColor left, IccNamedColor right)
-        {
-            return left.Equals(right);
-        }
+        public static bool operator ==(IccNamedColor left, IccNamedColor right) => left.Equals(right);
 
         /// <summary>
         /// Compares two <see cref="IccNamedColor"/> objects for equality.
@@ -68,23 +64,17 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
         /// <returns>
         /// True if the <paramref name="left"/> parameter is not equal to the <paramref name="right"/> parameter; otherwise, false.
         /// </returns>
-        public static bool operator !=(IccNamedColor left, IccNamedColor right)
-        {
-            return !left.Equals(right);
-        }
+        public static bool operator !=(IccNamedColor left, IccNamedColor right) => !left.Equals(right);
 
         /// <inheritdoc/>
-        public override bool Equals(object obj)
-        {
-            return obj is IccNamedColor other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccNamedColor other && this.Equals(other);
 
         /// <inheritdoc/>
         public bool Equals(IccNamedColor other)
         {
             return this.Name.Equals(other.Name)
-                && this.PcsCoordinates.SequenceEqual(other.PcsCoordinates)
-                && this.DeviceCoordinates.SequenceEqual(other.DeviceCoordinates);
+                && this.PcsCoordinates.AsSpan().SequenceEqual(other.PcsCoordinates)
+                && this.DeviceCoordinates.AsSpan().SequenceEqual(other.DeviceCoordinates);
         }
 
         /// <inheritdoc/>
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
index 76ac5961d9..d630f015e9 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -68,18 +67,15 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
         /// <inheritdoc/>
         public bool Equals(IccProfileDescription other) =>
-            this.DeviceManufacturer == other.DeviceManufacturer &&
-            this.DeviceModel == other.DeviceModel &&
-            this.DeviceAttributes == other.DeviceAttributes &&
-            this.TechnologyInformation == other.TechnologyInformation &&
-            this.DeviceManufacturerInfo.SequenceEqual(other.DeviceManufacturerInfo) &&
-            this.DeviceModelInfo.SequenceEqual(other.DeviceModelInfo);
+            this.DeviceManufacturer == other.DeviceManufacturer
+            && this.DeviceModel == other.DeviceModel
+            && this.DeviceAttributes == other.DeviceAttributes
+            && this.TechnologyInformation == other.TechnologyInformation
+            && this.DeviceManufacturerInfo.AsSpan().SequenceEqual(other.DeviceManufacturerInfo)
+            && this.DeviceModelInfo.AsSpan().SequenceEqual(other.DeviceModelInfo);
 
         /// <inheritdoc />
-        public override bool Equals(object obj)
-        {
-            return obj is IccProfileDescription other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccProfileDescription other && this.Equals(other);
 
         /// <inheritdoc />
         public override int GetHashCode()
diff --git a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
index 9eb9fc7c3e..6bf420b49e 100644
--- a/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
+++ b/src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Linq;
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 {
@@ -34,14 +33,11 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Icc
 
         /// <inheritdoc />
         public bool Equals(IccProfileSequenceIdentifier other) =>
-            this.Id.Equals(other.Id) &&
-            this.Description.SequenceEqual(other.Description);
+            this.Id.Equals(other.Id)
+            && this.Description.AsSpan().SequenceEqual(other.Description);
 
         /// <inheritdoc />
-        public override bool Equals(object obj)
-        {
-            return obj is IccProfileSequenceIdentifier other && this.Equals(other);
-        }
+        public override bool Equals(object obj) => obj is IccProfileSequenceIdentifier other && this.Equals(other);
 
         /// <inheritdoc />
         public override int GetHashCode() => HashCode.Combine(this.Id, this.Description);
diff --git a/src/ImageSharp/Processing/ResizeOptions.cs b/src/ImageSharp/Processing/ResizeOptions.cs
index 0d5bfe38bc..ee0dde6b27 100644
--- a/src/ImageSharp/Processing/ResizeOptions.cs
+++ b/src/ImageSharp/Processing/ResizeOptions.cs
@@ -1,8 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Collections.Generic;
-using System.Linq;
 using SixLabors.ImageSharp.Processing.Processors.Transforms;
 using SixLabors.Primitives;
 
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.Processing
         /// <summary>
         /// Gets or sets the center coordinates.
         /// </summary>
-        public IEnumerable<float> CenterCoordinates { get; set; } = Enumerable.Empty<float>();
+        public IEnumerable<float> CenterCoordinates { get; set; } = Array.Empty<float>();
 
         /// <summary>
         /// Gets or sets the target size.

From c5b14312b0e13da5bc2e57ee96213823be92f638 Mon Sep 17 00:00:00 2001
From: Tanner Gooding <tagoo@outlook.com>
Date: Sat, 1 Jun 2019 05:14:03 -0700
Subject: [PATCH 211/223] Updating the repo to use
 Directory.Build.props/targets files (#920)

* Updating the repo to use Directory.Build.props/targets files

* Adding an InternalsVisibleTo for DynamicProxyGenAssembly2, PublicKeyToken=null

* Removing duplicate includes from the ImageSharp.csproj

* Updating the .gitattributes file to explicitly list the line endings

* Removing the ImageSharp.ruleset file, as the one from standards should be used instead

* Updating the package version management to use `PackageReference Update`
---
 .editorconfig                                 | 369 +++++++++++++++++-
 .gitattributes                                | 124 +++---
 Directory.Build.props                         |  77 ++++
 Directory.Build.targets                       |  47 +++
 ImageSharp.ruleset                            |  15 -
 ImageSharp.sln                                | 361 ++++++++++++++++-
 NuGet.config                                  |   9 -
 src/Directory.Build.props                     |  41 ++
 src/Directory.Build.targets                   |  55 +++
 .../ImageSharp.Drawing.csproj                 |  50 +--
 .../Properties/AssemblyInfo.cs                |   4 -
 src/ImageSharp/ImageSharp.csproj              | 204 +++++-----
 src/ImageSharp/Properties/AssemblyInfo.cs     |   5 +-
 src/Shared/AssemblyInfo.Common.cs             |  15 -
 tests/Directory.Build.props                   |  30 ++
 tests/Directory.Build.targets                 |  19 +
 .../ImageSharp.Benchmarks.csproj              |  36 +-
 .../ImageSharp.Sandbox46.csproj               |  36 +-
 .../Properties/AssemblyInfo.cs                |  15 -
 .../ImageSharp.Tests/ImageSharp.Tests.csproj  |  57 +--
 20 files changed, 1209 insertions(+), 360 deletions(-)
 create mode 100644 Directory.Build.props
 create mode 100644 Directory.Build.targets
 delete mode 100644 ImageSharp.ruleset
 delete mode 100644 NuGet.config
 create mode 100644 src/Directory.Build.props
 create mode 100644 src/Directory.Build.targets
 delete mode 100644 src/ImageSharp.Drawing/Properties/AssemblyInfo.cs
 delete mode 100644 src/Shared/AssemblyInfo.Common.cs
 create mode 100644 tests/Directory.Build.props
 create mode 100644 tests/Directory.Build.targets
 delete mode 100644 tests/ImageSharp.Sandbox46/Properties/AssemblyInfo.cs

diff --git a/.editorconfig b/.editorconfig
index b725c5cce3..8f0e28eec6 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,20 +1,371 @@
-# top-most EditorConfig file
+###############################################################################
+# EditorConfig is awesome: http://EditorConfig.org
+###############################################################################
+
+###############################################################################
+# Top-most EditorConfig file
+###############################################################################
 root = true
 
-[*.cs]
+###############################################################################
+# Set default behavior to:
+#   a UTF-8 encoding,
+#   Unix-style line endings,
+#   a newline ending the file,
+#   4 space indentation, and
+#   trimming of trailing whitespace
+###############################################################################
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
 indent_style = space
 indent_size = 4
-csharp_style_var_for_built_in_types = false:warning
-csharp_style_var_elsewhere = false:warning
-csharp_style_var_when_type_is_apparent = true:warning
+trim_trailing_whitespace = true
+
+###############################################################################
+# Set file behavior to:
+#   2 space indentation
+###############################################################################
+[*.{cmd,config,csproj,json,props,ps1,resx,sh,targets}]
+indent_size = 2
+
+###############################################################################
+# Set file behavior to:
+#   Windows-style line endings, and
+#   tabular indentation
+###############################################################################
+[*.sln]
 end_of_line = crlf
+indent_style = tab
+
+###############################################################################
+# Set dotnet naming rules to:
+#    suggest async members be pascal case suffixed with Async
+#    suggest const declarations be pascal case
+#    suggest interfaces be pascal case prefixed with I
+#    suggest parameters be camel case
+#    suggest private and internal static fields be camel case
+#    suggest private and internal fields be camel case
+#    suggest public and protected declarations be pascal case
+#    suggest static readonly declarations be pascal case
+#    suggest type parameters be prefixed with T
+###############################################################################
+[*.cs]
+dotnet_naming_rule.async_members_should_be_pascal_case_suffixed_with_async.severity = suggestion
+dotnet_naming_rule.async_members_should_be_pascal_case_suffixed_with_async.style = pascal_case_suffixed_with_async
+dotnet_naming_rule.async_members_should_be_pascal_case_suffixed_with_async.symbols = async_members
+
+dotnet_naming_rule.const_declarations_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.const_declarations_should_be_pascal_case.style = pascal_case
+dotnet_naming_rule.const_declarations_should_be_pascal_case.symbols = const_declarations
+
+dotnet_naming_rule.interfaces_should_be_pascal_case_prefixed_with_i.severity = suggestion
+dotnet_naming_rule.interfaces_should_be_pascal_case_prefixed_with_i.style = pascal_case_prefixed_with_i
+dotnet_naming_rule.interfaces_should_be_pascal_case_prefixed_with_i.symbols = interfaces
+
+dotnet_naming_rule.parameters_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.parameters_should_be_camel_case.style = camel_case
+dotnet_naming_rule.parameters_should_be_camel_case.symbols = parameters
+
+dotnet_naming_rule.private_and_internal_static_fields_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.private_and_internal_static_fields_should_be_camel_case.style = camel_case
+dotnet_naming_rule.private_and_internal_static_fields_should_be_camel_case.symbols = private_and_internal_static_fields
+
+dotnet_naming_rule.private_and_internal_fields_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.private_and_internal_fields_should_be_camel_case.style = camel_case
+dotnet_naming_rule.private_and_internal_fields_should_be_camel_case.symbols = private_and_internal_fields
+
+dotnet_naming_rule.public_and_protected_declarations_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.public_and_protected_declarations_should_be_pascal_case.style = pascal_case
+dotnet_naming_rule.public_and_protected_declarations_should_be_pascal_case.symbols = public_and_protected_declarations
+
+dotnet_naming_rule.static_readonly_declarations_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.static_readonly_declarations_should_be_pascal_case.style = pascal_case
+dotnet_naming_rule.static_readonly_declarations_should_be_pascal_case.symbols = static_readonly_declarations
+
+dotnet_naming_rule.type_parameters_should_be_pascal_case_prefixed_with_t.severity = suggestion
+dotnet_naming_rule.type_parameters_should_be_pascal_case_prefixed_with_t.style = pascal_case_prefixed_with_t
+dotnet_naming_rule.type_parameters_should_be_pascal_case_prefixed_with_t.symbols = type_parameters
+
+###############################################################################
+# Set dotnet naming styles to define:
+#   camel case
+#   pascal case
+#   pascal case suffixed with Async
+#   pascal case prefixed with I
+#   pascal case prefixed with T
+###############################################################################
+[*.cs]
+dotnet_naming_style.camel_case.capitalization = camel_case
+
+dotnet_naming_style.pascal_case.capitalization = pascal_case
+
+dotnet_naming_style.pascal_case_suffixed_with_async.capitalization = pascal_case
+dotnet_naming_style.pascal_case_suffixed_with_async.required_suffix = Async
+
+dotnet_naming_style.pascal_case_prefixed_with_i.capitalization = pascal_case
+dotnet_naming_style.pascal_case_prefixed_with_i.required_prefix = I
+
+dotnet_naming_style.pascal_case_prefixed_with_t.capitalization = pascal_case
+dotnet_naming_style.pascal_case_prefixed_with_t.required_prefix = T
+
+###############################################################################
+# Set dotnet naming symbols to:
+#   async members
+#   const declarations
+#   interfaces
+#   private and internal fields
+#   private and internal static fields
+#   public and protected declarations
+#   static readonly declarations
+#   type parameters
+###############################################################################
+[*.cs]
+dotnet_naming_symbols.async_members.required_modifiers = async
+
+dotnet_naming_symbols.const_declarations.required_modifiers = const
+
+dotnet_naming_symbols.interfaces.applicable_kinds = interface
+
+dotnet_naming_symbols.parameters.applicable_kinds = parameter
+
+dotnet_naming_symbols.private_and_internal_fields.applicable_accessibilities = private, internal
+dotnet_naming_symbols.private_and_internal_fields.applicable_kinds = field
+
+dotnet_naming_symbols.private_and_internal_static_fields.applicable_accessibilities = private, internal
+dotnet_naming_symbols.private_and_internal_static_fields.applicable_kinds = field
+dotnet_naming_symbols.private_and_internal_static_fields.required_modifiers = static
+
+dotnet_naming_symbols.public_and_protected_declarations.applicable_accessibilities = public, protected
+
+dotnet_naming_symbols.static_readonly_declarations.required_modifiers = static, readonly
+
+dotnet_naming_symbols.type_parameters.applicable_kinds = type_parameter
+
+###############################################################################
+# Set dotnet sort options to:
+#   do not separate import directives into groups, and
+#   sort system directives first
+###############################################################################
+[*.cs]
+dotnet_separate_import_directive_groups = false
 dotnet_sort_system_directives_first = true
+
+###############################################################################
+# Set dotnet style options to:
+#   suggest null-coalescing expressions,
+#   suggest collection-initializers,
+#   suggest explicit tuple names,
+#   suggest null-propogation
+#   suggest object-initializers,
+#   generate parentheses in arithmetic binary operators for clarity,
+#   generate parentheses in other binary operators for clarity,
+#   don't generate parentheses in other operators if unnecessary,
+#   generate parentheses in relational binary operators for clarity,
+#   warn when not using predefined-types for locals, parameters, and members,
+#   generate predefined-types of type names for member access,
+#   generate auto properties,
+#   suggest compound assignment,
+#   generate conditional expression over assignment,
+#   generate conditional expression over return,
+#   suggest inferred anonymous types,
+#   suggest inferred tuple names,
+#   suggest 'is null' checks over '== null',
+#   don't generate 'this.' and 'Me.' for events,
+#   warn when not using 'this.' and 'Me.' for fields,
+#   warn when not using 'this.' and 'Me.' for methods,
+#   warn when not using 'this.' and 'Me.' for properties,
+#   suggest readonly fields, and
+#   generate accessibility modifiers for non interface members
+###############################################################################
+[*.cs]
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_object_initializer = true:suggestion
+
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
+
 dotnet_style_predefined_type_for_locals_parameters_members = true:warning
-dotnet_style_predefined_type_for_member_access = true:warning
+dotnet_style_predefined_type_for_member_access = true:silent
+
+dotnet_style_prefer_auto_properties = true:silent
+dotnet_style_prefer_compound_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:silent
+dotnet_style_prefer_conditional_expression_over_return = true:silent
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+
+dotnet_style_qualification_for_event = false:silent
 dotnet_style_qualification_for_field = true:warning
 dotnet_style_qualification_for_method = true:warning
 dotnet_style_qualification_for_property = true:warning
 
-[*.tt]
-indent_style = space
-indent_size = 4
\ No newline at end of file
+dotnet_style_readonly_field = true:suggestion
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+
+###############################################################################
+# Set dotnet style options to:
+#   suggest removing all unused parameters
+###############################################################################
+[*.cs]
+dotnet_code_quality_unused_parameters = all:suggestion
+
+###############################################################################
+# Set csharp indent options to:
+#   indent block contents,
+#   not indent braces,
+#   indent case contents,
+#   not indent case contents when block,
+#   indent labels one less than the current, and
+#   indent switch labels
+###############################################################################
+[*.cs]
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_case_contents_when_block = false
+csharp_indent_labels = one_less_than_current
+csharp_indent_switch_labels = true
+
+###############################################################################
+# Set csharp new-line options to:
+#   insert a new-line before "catch",
+#   insert a new-line before "else",
+#   insert a new-line before "finally",
+#   insert a new-line before members in anonymous-types,
+#   insert a new-line before members in object-initializers, and
+#   insert a new-line before all open braces
+###############################################################################
+[*.cs]
+csharp_new_line_before_catch = true
+csharp_new_line_before_else = true
+csharp_new_line_before_finally = true
+
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_before_members_in_object_initializers = true
+
+csharp_new_line_before_open_brace = all
+
+###############################################################################
+# Set csharp preserve options to:
+#   preserve single-line blocks, and
+#   preserve single-line statements
+###############################################################################
+[*.cs]
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = true
+
+###############################################################################
+# Set csharp space options to:
+#   remove any space after a cast,
+#   add a space after the colon in an inheritance clause,
+#   add a space after a comma,
+#   remove any space after a dot,
+#   add a space after keywords in control flow statements,
+#   add a space after a semicolon in a "for" statement,
+#   add a space before and after binary operators,
+#   remove space around declaration statements,
+#   add a space before the colon in an inheritance clause,
+#   remove any space before a comma,
+#   remove any space before a dot,
+#   remove any space before an open square-bracket,
+#   remove any space before a semicolon in a "for" statement,
+#   remove any space between empty square-brackets,
+#   remove any space between a method call's empty parameter list parenthesis,
+#   remove any space between a method call's name and its opening parenthesis,
+#   remove any space between a method call's parameter list parenthesis,
+#   remove any space between a method declaration's empty parameter list parenthesis,
+#   remove any space between a method declaration's name and its openening parenthesis,
+#   remove any space between a method declaration's parameter list parenthesis,
+#   remove any space between parentheses, and
+#   remove any space between square brackets
+###############################################################################
+[*.cs]
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_comma = true
+csharp_space_after_dot = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_after_semicolon_in_for_statement = true
+
+csharp_space_around_binary_operators = before_and_after
+csharp_space_around_declaration_statements = do_not_ignore
+
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_before_comma = false
+csharp_space_before_dot = false
+csharp_space_before_open_square_brackets = false
+csharp_space_before_semicolon_in_for_statement = false
+
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_between_square_brackets = false
+
+###############################################################################
+# Set csharp style options to:
+#   generate braces,
+#   suggest simple default expressions,
+#   generate a preferred modifier order,
+#   suggest conditional delegate calls,
+#   suggest deconstructed variable declarations,
+#   generate expression-bodied accessors,
+#   don't generate expression-bodied constructors,
+#   generate expression-bodied indexers,
+#   generate expression-bodied lambdas,
+#   don't generate expression-bodied methods,
+#   don't generate expression-bodied operators,
+#   generate expression-bodied properties,
+#   suggest inlined variable declarations,
+#   suggest local over anonymous functions,
+#   suggest pattern-matching over "as" with "null" check,
+#   suggest pattern-matching over "is" with "cast" check,
+#   suggest throw expressions,
+#   generate a discard variable for unused value expression statements,
+#   suggest a discard variable for unused assignments,
+#   warn when using var for built-in types,
+#   warn when using var when the type is not apparent, and
+#   warn when not using var when the type is apparent
+###############################################################################
+[*.cs]
+csharp_prefer_braces = true:silent
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:silent
+
+csharp_style_conditional_delegate_call = true:suggestion
+csharp_style_deconstructed_variable_declaration = true:suggestion
+
+csharp_style_expression_bodied_accessors = true:silent
+csharp_style_expression_bodied_constructors = false:silent
+csharp_style_expression_bodied_indexers = true:silent
+csharp_style_expression_bodied_lambdas = true:silent
+csharp_style_expression_bodied_methods = false:silent
+csharp_style_expression_bodied_operators = false:silent
+csharp_style_expression_bodied_properties = true:silent
+
+csharp_style_inlined_variable_declaration = true:suggestion
+
+csharp_style_pattern_local_over_anonymous_function = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+
+csharp_style_throw_expression = true:suggestion
+
+csharp_style_unused_value_expression_statement_preference = discard_variable:silent
+csharp_style_unused_value_assignment_preference = discard_variable:suggestion
+
+csharp_style_var_for_built_in_types = false:warning
+csharp_style_var_elsewhere = false:warning
+csharp_style_var_when_type_is_apparent = true:warning
diff --git a/.gitattributes b/.gitattributes
index 2a7d04dc7b..704a6aa436 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,50 +1,82 @@
-*.doc  diff=astextplain
-*.DOC	diff=astextplain
-*.docx	diff=astextplain
-*.DOCX	diff=astextplain
-*.dot	diff=astextplain
-*.DOT	diff=astextplain
-*.pdf	diff=astextplain
-*.PDF	diff=astextplain
-*.rtf	diff=astextplain
-*.RTF	diff=astextplain
+###############################################################################
+# Set default behavior to:
+#   treat as text and
+#   normalize to Unix-style line endings
+*           text        eol=lf
 
-*.jpg  	binary
-*.png 	binary
-*.gif 	binary
-*.cs text=auto diff=csharp 
-*.vb text=auto
-*.c text=auto
-*.cpp text=auto
-*.cxx text=auto
-*.h text=auto
-*.hxx text=auto
-*.py text=auto
-*.rb text=auto
-*.java text=auto
-*.html text=auto
-*.htm text=auto
-*.css text=auto
-*.scss text=auto
-*.sass text=auto
-*.less text=auto
-*.js text=auto
-*.lisp text=auto
-*.clj text=auto
-*.sql text=auto
-*.php text=auto
-*.lua text=auto
-*.m text=auto
-*.asm text=auto
-*.erl text=auto
-*.fs text=auto
-*.fsx text=auto
-*.hs text=auto
-*.csproj text=auto merge=union 
-*.vbproj text=auto merge=union 
-*.fsproj text=auto merge=union 
-*.dbproj text=auto merge=union 
-*.sln text=auto eol=crlf merge=union 
+# Set explicit file behavior to:
+*.asm               text        eol=lf
+*.c                 text        eol=lf
+*.clj               text        eol=lf
+*.cmd               text        eol=lf
+*.cpp               text        eol=lf
+*.css               text        eol=lf
+*.cxx               text        eol=lf
+*.config            text        eol=lf
+*.DotSettings       text        eol=lf
+*.erl               text        eol=lf
+*.fs                text        eol=lf
+*.fsx               text        eol=lf
+*.h                 text        eol=lf
+*.htm               text        eol=lf
+*.html              text        eol=lf
+*.hs                text        eol=lf
+*.hxx               text        eol=lf
+*.java              text        eol=lf
+*.js                text        eol=lf
+*.json              text        eol=lf
+*.less              text        eol=lf
+*.lisp              text        eol=lf
+*.lua               text        eol=lf
+*.m                 text        eol=lf
+*.md                text        eol=lf
+*.php               text        eol=lf
+*.props             text        eol=lf
+*.ps1               text        eol=lf
+*.py                text        eol=lf
+*.rb                text        eol=lf
+*.resx              text        eol=lf
+*.runsettings       text        eol=lf
+*.ruleset           text        eol=lf
+*.sass              text        eol=lf
+*.scss              text        eol=lf
+*.sh                text        eol=lf
+*.sql               text        eol=lf
+*.svg               text        eol=lf
+*.targets           text        eol=lf
+*.tt                text        eol=lf
+*.ttinclude         text        eol=lf
+*.txt               text        eol=lf
+*.vb                text        eol=lf
+*.yml               text        eol=lf
+#   treat as text
+#   normalize to Unix-style line endings and
+#   diff as csharp
+*.cs                text        eol=lf          diff=csharp
+#   use a union merge when resoling conflicts
+*.csproj            text        eol=lf          merge=union
+*.dbproj            text        eol=lf          merge=union
+*.fsproj            text        eol=lf          merge=union
+*.ncrunchproject    text        eol=lf          merge=union
+*.vbproj            text        eol=lf          merge=union
+#   normalize to Windows-style line endings and
+*.sln               text        eol=crlf        merge=union
+#   treat as binary
+*.bmp               binary
+*.dll               binary
+*.exe               binary
+*.gif               binary
+*.jpg               binary
+*.png               binary
+*.ttf               binary
+*.snk               binary
+#   diff as plain text
+*.doc               diff=astextplain
+*.docx              diff=astextplain
+*.dot               diff=astextplain
+*.pdf               diff=astextplain
+*.pptx              diff=astextplain
+*.rtf               diff=astextplain
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.bmp filter=lfs diff=lfs merge=lfs -text
diff --git a/Directory.Build.props b/Directory.Build.props
new file mode 100644
index 0000000000..9c92c14b8a
--- /dev/null
+++ b/Directory.Build.props
@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.props is automatically picked up and imported by
+    Microsoft.Common.props. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly early and only Sdk.props will have been imported
+    beforehand. We also don't need to add ourselves to MSBuildAllProjects, as
+    that is done by the file that imports us.
+  -->
+
+  <!-- Default settings that are used by other settings -->
+  <PropertyGroup>
+    <BaseArtifactsPath>$(MSBuildThisFileDirectory)artifacts/</BaseArtifactsPath>
+    <BaseArtifactsPathSuffix>$(ImageSharpProjectCategory)/$(MSBuildProjectName)</BaseArtifactsPathSuffix>
+    <RepositoryUrl>https://github.com/SixLabors/ImageSharp/</RepositoryUrl>
+  </PropertyGroup>
+
+  <!-- Default settings that explicitly differ from the Sdk.props defaults  -->
+  <PropertyGroup>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <BaseIntermediateOutputPath>$(BaseArtifactsPath)obj/$(BaseArtifactsPathSuffix)/</BaseIntermediateOutputPath>
+    <DebugType>portable</DebugType>
+    <DebugType Condition="'$(codecov)' != ''">full</DebugType>
+    <NullableContextOptions>disable</NullableContextOptions>
+    <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
+    <SignAssembly>false</SignAssembly>
+    <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
+    <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
+  </PropertyGroup>
+
+  <!-- Default settings that explicitly differ from the Sdk.targets defaults-->
+  <PropertyGroup>
+    <Authors>Six Labors and contributors</Authors>
+    <BaseOutputPath>$(BaseArtifactsPath)bin/$(BaseArtifactsPathSuffix)/</BaseOutputPath>
+    <Company>Six Labors</Company>
+    <PackageOutputPath>$(BaseArtifactsPath)pkg/$(BaseArtifactsPathSuffix)/$(Configuration)/</PackageOutputPath>
+    <Product>SixLabors.ImageSharp</Product>
+    <VersionPrefix>0.0.1</VersionPrefix>
+    <VersionPrefix Condition="'$(packageversion)' != ''">$(PackageVersion)</VersionPrefix>
+    <VersionSuffix></VersionSuffix>
+  </PropertyGroup>
+
+  <!-- Default settings that are otherwise undefined -->
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)standards/SixLabors.snk</AssemblyOriginatorKeyFile>
+    <Copyright>Copyright © Six Labors and Contributors</Copyright>
+    <Features>strict;IOperation</Features>
+    <HighEntropyVA>true</HighEntropyVA>
+    <LangVersion>7.3</LangVersion>
+    <NeutralLanguage>en</NeutralLanguage>
+    <OverwriteReadOnlyFiles>true</OverwriteReadOnlyFiles>
+    <PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Branding/master/icons/imagesharp/sixlabors.imagesharp.128.png</PackageIconUrl>
+    <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
+    <PackageProjectUrl>$(RepositoryUrl)</PackageProjectUrl>
+    <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
+    <RepositoryType>git</RepositoryType>
+    <RestoreSources>
+      https://www.myget.org/F/sixlabors/api/v3/index.json;
+      https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json;
+      https://api.nuget.org/v3/index.json;
+    </RestoreSources>
+    <SixLaborsPublicKey>002400000c8000009400000006020000002400005253413100040000010001000147e6fe6766715eec6cfed61f1e7dcdbf69748a3e355c67e9d8dfd953acab1d5e012ba34b23308166fdc61ee1d0390d5f36d814a6091dd4b5ed9eda5a26afced924c683b4bfb4b3d64b0586a57eff9f02b1f84e3cb0ddd518bd1697f2c84dcbb97eb8bb5c7801be12112ed0ec86db934b0e9a5171e6bb1384b6d2f7d54dfa97</SixLaborsPublicKey>
+    <UseSharedCompilation>true</UseSharedCompilation>
+  </PropertyGroup>
+
+  <!-- Package references which are consumed by all projects -->
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Net.Compilers.Toolset" IsImplicitlyDefined="true" />
+  </ItemGroup>
+
+</Project>
diff --git a/Directory.Build.targets b/Directory.Build.targets
new file mode 100644
index 0000000000..3504398794
--- /dev/null
+++ b/Directory.Build.targets
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.targets is automatically picked up and imported by
+    Microsoft.Common.targets. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly late and most other props/targets will have been
+    imported beforehand. We also don't need to add ourselves to
+    MSBuildAllProjects, as that is done by the file that imports us.
+  -->
+
+  <!-- Settings that append the existing setting value -->
+  <PropertyGroup>
+    <DefineConstants>$(DefineConstants);$(OS)</DefineConstants>
+  </PropertyGroup>
+
+  <!-- Tool versions for tool references across all projects -->
+  <ItemGroup>
+    <DotNetCliToolReference Update="dotnet-xunit" Version="2.3.1" />
+  </ItemGroup>
+
+  <!-- Package versions for package references across all projects -->
+  <ItemGroup>
+    <PackageReference Update="BenchmarkDotNet" Version="0.11.5" />
+    <PackageReference Update="Colourful" Version="2.0.2" />
+    <PackageReference Update="Magick.NET-Q16-AnyCPU" Version="7.12.0" />
+    <PackageReference Update="Microsoft.Net.Compilers.Toolset" Version="3.1.0-beta2-final" />
+    <PackageReference Update="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Update="Moq" Version="4.10.0" />
+    <PackageReference Update="SixLabors.Core" Version="1.0.0-dev000101" />
+    <PackageReference Update="SixLabors.Fonts" Version="1.0.0-beta0008" />
+    <PackageReference Update="SixLabors.Shapes" Version="1.0.0-beta0008" />
+    <PackageReference Update="SixLabors.Shapes.Text" Version="1.0.0-beta0007" />
+    <PackageReference Update="StyleCop.Analyzers" Version="1.1.118" />
+    <PackageReference Update="System.Drawing.Common" Version="4.5.1" />
+    <PackageReference Update="System.IO.Compression" Version="4.3.0" />
+    <PackageReference Update="System.IO.UnmanagedMemoryStream" Version="4.3.0" />
+    <PackageReference Update="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
+    <PackageReference Update="System.Threading.Tasks.Parallel" Version="4.3.0" />
+    <PackageReference Update="System.ValueTuple" Version="4.5.0" />
+    <PackageReference Update="xunit" Version="2.3.1" />
+    <PackageReference Update="xunit.runner.console" Version="2.3.1" />
+    <PackageReference Update="xunit.runner.visualstudio" Version="2.3.1" />
+  </ItemGroup>
+
+</Project>
diff --git a/ImageSharp.ruleset b/ImageSharp.ruleset
deleted file mode 100644
index d318b75c2e..0000000000
--- a/ImageSharp.ruleset
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<RuleSet Name="ImageSharp" ToolsVersion="15.0">
-  <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
-    <Rule Id="AD0001" Action="None" />
-    <Rule Id="SA1413" Action="None" />
-   <!-- <Rule Id="SA1405" Action="None" />
-     temp remove the header requirement as stylecop is currently failing to read the stylecop.json file from 'dotnet build' 
-    <Rule Id="SA1636" Action="None" />-->
-    <Rule Id="SA1633" Action="None" />
-    <!--1.1.0-beta6 incorrectly throws a wobbler here for multiline matrices-->
-    <Rule Id="SA1500" Action="None" /> 
-    <!--Comments should end with a period. I like this but there's 3000+ errors to fix-->
-    <Rule Id="SA1629" Action="None" /> 
-  </Rules>
-</RuleSet>
\ No newline at end of file
diff --git a/ImageSharp.sln b/ImageSharp.sln
index 3c3817bf63..1fd5e2d8b4 100644
--- a/ImageSharp.sln
+++ b/ImageSharp.sln
@@ -1,47 +1,356 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26730.12
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28902.138
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "SolutionItems", "SolutionItems", "{C317F1B1-D75E-4C6D-83EB-80367343E0D7}"
 	ProjectSection(SolutionItems) = preProject
-		standards\.editorconfig = standards\.editorconfig
+		.editorconfig = .editorconfig
+		.gitattributes = .gitattributes
+		.gitignore = .gitignore
+		.gitmodules = .gitmodules
 		.travis.yml = .travis.yml
 		appveyor.yml = appveyor.yml
-		.github\ISSUE_TEMPLATE\ask-question.md = .github\ISSUE_TEMPLATE\ask-question.md
-		.github\ISSUE_TEMPLATE\bug-report.md = .github\ISSUE_TEMPLATE\bug-report.md
+		build.cmd = build.cmd
+		build.ps1 = build.ps1
 		codecov.yml = codecov.yml
 		CodeCoverage.runsettings = CodeCoverage.runsettings
-		.github\CONTRIBUTING.md = .github\CONTRIBUTING.md
-		.github\ISSUE_TEMPLATE\feature-request.md = .github\ISSUE_TEMPLATE\feature-request.md
-		features.md = features.md
+		Directory.Build.props = Directory.Build.props
+		Directory.Build.targets = Directory.Build.targets
 		ImageSharp.sln.DotSettings = ImageSharp.sln.DotSettings
-		NuGet.config = NuGet.config
-		.github\PULL_REQUEST_TEMPLATE.md = .github\PULL_REQUEST_TEMPLATE.md
+		LICENSE = LICENSE
 		README.md = README.md
 		run-tests.ps1 = run-tests.ps1
-		standards\SixLabors.ruleset = standards\SixLabors.ruleset
-		standards\stylecop.json = standards\stylecop.json
+		stylecop.json = stylecop.json
 	EndProjectSection
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Source", "Source", "{815C0625-CD3D-440F-9F80-2D83856AB7AE}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".github", ".github", "{1799C43E-5C54-4A8F-8D64-B1475241DB0D}"
 	ProjectSection(SolutionItems) = preProject
-		src\README.md = src\README.md
+		.github\CONTRIBUTING.md = .github\CONTRIBUTING.md
+		.github\PULL_REQUEST_TEMPLATE.md = .github\PULL_REQUEST_TEMPLATE.md
 	EndProjectSection
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{56801022-D71A-4FBE-BC5B-CBA08E2284EC}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ISSUE_TEMPLATE", "ISSUE_TEMPLATE", "{FBE8C1AD-5AEC-4514-9B64-091D8E145865}"
+	ProjectSection(SolutionItems) = preProject
+		.github\ISSUE_TEMPLATE\ask-question.md = .github\ISSUE_TEMPLATE\ask-question.md
+		.github\ISSUE_TEMPLATE\bug-report.md = .github\ISSUE_TEMPLATE\bug-report.md
+		.github\ISSUE_TEMPLATE\feature-request.md = .github\ISSUE_TEMPLATE\feature-request.md
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".vscode", ".vscode", "{0274D4CF-9932-47CC-8E89-54DC05B8F06E}"
+	ProjectSection(SolutionItems) = preProject
+		.vscode\launch.json = .vscode\launch.json
+		.vscode\tasks.json = .vscode\tasks.json
+	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{E919DF0B-2607-4462-8FC0-5C98FE50F8C9}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Shared", "Shared", "{9E574A07-F879-4811-9C41-5CBDC6BAFDB7}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "icons", "icons", "{2B02E303-7CC6-4E15-97EE-DBE86B287553}"
 	ProjectSection(SolutionItems) = preProject
-		src\Shared\AssemblyInfo.Common.cs = src\Shared\AssemblyInfo.Common.cs
+		build\icons\imagesharp-logo-128.png = build\icons\imagesharp-logo-128.png
+		build\icons\imagesharp-logo-256.png = build\icons\imagesharp-logo-256.png
+		build\icons\imagesharp-logo-32.png = build\icons\imagesharp-logo-32.png
+		build\icons\imagesharp-logo-512.png = build\icons\imagesharp-logo-512.png
+		build\icons\imagesharp-logo-64.png = build\icons\imagesharp-logo-64.png
+		build\icons\imagesharp-logo.png = build\icons\imagesharp-logo.png
+		build\icons\imagesharp-logo.svg = build\icons\imagesharp-logo.svg
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{815C0625-CD3D-440F-9F80-2D83856AB7AE}"
+	ProjectSection(SolutionItems) = preProject
+		src\Directory.Build.props = src\Directory.Build.props
+		src\Directory.Build.targets = src\Directory.Build.targets
+		src\README.md = src\README.md
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImageSharp", "src\ImageSharp\ImageSharp.csproj", "{2AA31A1F-142C-43F4-8687-09ABCA4B3A26}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImageSharp.Drawing", "src\ImageSharp.Drawing\ImageSharp.Drawing.csproj", "{2E33181E-6E28-4662-A801-E2E7DC206029}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{56801022-D71A-4FBE-BC5B-CBA08E2284EC}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Directory.Build.props = tests\Directory.Build.props
+		tests\Directory.Build.targets = tests\Directory.Build.targets
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "CodeCoverage", "CodeCoverage", "{D4C5EC58-F8E6-4636-B9EE-C99D2578E5C6}"
+	ProjectSection(SolutionItems) = preProject
+		tests\CodeCoverage\CodeCoverage.cmd = tests\CodeCoverage\CodeCoverage.cmd
+		tests\CodeCoverage\packages.config = tests\CodeCoverage\packages.config
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Images", "Images", "{FA55F5DE-11A6-487D-ABA4-BC93A02717DD}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Input", "Input", "{9DA226A1-8656-49A8-A58A-A8B5C081AD66}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Bmp", "Bmp", "{1A82C5F6-90E0-4E97-BE16-A825C046B493}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Bmp\BitmapCoreHeaderQR.bmp = tests\Images\Input\Bmp\BitmapCoreHeaderQR.bmp
+		tests\Images\Input\Bmp\BITMAPV5HEADER.bmp = tests\Images\Input\Bmp\BITMAPV5HEADER.bmp
+		tests\Images\Input\Bmp\Car.bmp = tests\Images\Input\Bmp\Car.bmp
+		tests\Images\Input\Bmp\F.bmp = tests\Images\Input\Bmp\F.bmp
+		tests\Images\Input\Bmp\issue735.bmp = tests\Images\Input\Bmp\issue735.bmp
+		tests\Images\Input\Bmp\neg_height.bmp = tests\Images\Input\Bmp\neg_height.bmp
+		tests\Images\Input\Bmp\pal1.bmp = tests\Images\Input\Bmp\pal1.bmp
+		tests\Images\Input\Bmp\pal1p1.bmp = tests\Images\Input\Bmp\pal1p1.bmp
+		tests\Images\Input\Bmp\pal4.bmp = tests\Images\Input\Bmp\pal4.bmp
+		tests\Images\Input\Bmp\pal4rle.bmp = tests\Images\Input\Bmp\pal4rle.bmp
+		tests\Images\Input\Bmp\pal8-0.bmp = tests\Images\Input\Bmp\pal8-0.bmp
+		tests\Images\Input\Bmp\pal8gs.bmp = tests\Images\Input\Bmp\pal8gs.bmp
+		tests\Images\Input\Bmp\pal8offs.bmp = tests\Images\Input\Bmp\pal8offs.bmp
+		tests\Images\Input\Bmp\pal8os2sp.bmp = tests\Images\Input\Bmp\pal8os2sp.bmp
+		tests\Images\Input\Bmp\pal8os2v1_winv2.bmp = tests\Images\Input\Bmp\pal8os2v1_winv2.bmp
+		tests\Images\Input\Bmp\pal8os2v2-16.bmp = tests\Images\Input\Bmp\pal8os2v2-16.bmp
+		tests\Images\Input\Bmp\pal8os2v2.bmp = tests\Images\Input\Bmp\pal8os2v2.bmp
+		tests\Images\Input\Bmp\pal8v4.bmp = tests\Images\Input\Bmp\pal8v4.bmp
+		tests\Images\Input\Bmp\pal8v5.bmp = tests\Images\Input\Bmp\pal8v5.bmp
+		tests\Images\Input\Bmp\rgb16-565.bmp = tests\Images\Input\Bmp\rgb16-565.bmp
+		tests\Images\Input\Bmp\rgb16-565pal.bmp = tests\Images\Input\Bmp\rgb16-565pal.bmp
+		tests\Images\Input\Bmp\rgb16.bmp = tests\Images\Input\Bmp\rgb16.bmp
+		tests\Images\Input\Bmp\rgb16bfdef.bmp = tests\Images\Input\Bmp\rgb16bfdef.bmp
+		tests\Images\Input\Bmp\rgb24.bmp = tests\Images\Input\Bmp\rgb24.bmp
+		tests\Images\Input\Bmp\rgb32.bmp = tests\Images\Input\Bmp\rgb32.bmp
+		tests\Images\Input\Bmp\rgb32bf.bmp = tests\Images\Input\Bmp\rgb32bf.bmp
+		tests\Images\Input\Bmp\rgb32bfdef.bmp = tests\Images\Input\Bmp\rgb32bfdef.bmp
+		tests\Images\Input\Bmp\rgba32-1010102.bmp = tests\Images\Input\Bmp\rgba32-1010102.bmp
+		tests\Images\Input\Bmp\rgba32.bmp = tests\Images\Input\Bmp\rgba32.bmp
+		tests\Images\Input\Bmp\rgba32abf.bmp = tests\Images\Input\Bmp\rgba32abf.bmp
+		tests\Images\Input\Bmp\rgba32h56.bmp = tests\Images\Input\Bmp\rgba32h56.bmp
+		tests\Images\Input\Bmp\RunLengthEncoded-inverted.bmp = tests\Images\Input\Bmp\RunLengthEncoded-inverted.bmp
+		tests\Images\Input\Bmp\RunLengthEncoded.bmp = tests\Images\Input\Bmp\RunLengthEncoded.bmp
+		tests\Images\Input\Bmp\test16-inverted.bmp = tests\Images\Input\Bmp\test16-inverted.bmp
+		tests\Images\Input\Bmp\test16.bmp = tests\Images\Input\Bmp\test16.bmp
+		tests\Images\Input\Bmp\test8-inverted.bmp = tests\Images\Input\Bmp\test8-inverted.bmp
+		tests\Images\Input\Bmp\test8.bmp = tests\Images\Input\Bmp\test8.bmp
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Gif", "Gif", "{EE3FB0B3-1C31-41E9-93AB-BA800560A868}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Gif\base_1x4.gif = tests\Images\Input\Gif\base_1x4.gif
+		tests\Images\Input\Gif\base_4x1.gif = tests\Images\Input\Gif\base_4x1.gif
+		tests\Images\Input\Gif\cheers.gif = tests\Images\Input\Gif\cheers.gif
+		tests\Images\Input\Gif\giphy.gif = tests\Images\Input\Gif\giphy.gif
+		tests\Images\Input\Gif\kumin.gif = tests\Images\Input\Gif\kumin.gif
+		tests\Images\Input\Gif\leo.gif = tests\Images\Input\Gif\leo.gif
+		tests\Images\Input\Gif\rings.gif = tests\Images\Input\Gif\rings.gif
+		tests\Images\Input\Gif\trans.gif = tests\Images\Input\Gif\trans.gif
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "issues", "issues", "{BF8DFDC1-CEE5-4A37-B216-D3085360C776}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Gif\issues\issue403_baddescriptorwidth.gif = tests\Images\Input\Gif\issues\issue403_baddescriptorwidth.gif
+		tests\Images\Input\Gif\issues\issue405_badappextlength252-2.gif = tests\Images\Input\Gif\issues\issue405_badappextlength252-2.gif
+		tests\Images\Input\Gif\issues\issue405_badappextlength252.gif = tests\Images\Input\Gif\issues\issue405_badappextlength252.gif
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Jpg", "Jpg", "{DB21FED7-E8CB-4B00-9EB2-9144D32A590A}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "baseline", "baseline", "{195BA3D3-3E9F-4BC5-AB40-5F9FEB638146}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\baseline\AsianCarvingLowContrast.jpg = tests\Images\Input\Jpg\baseline\AsianCarvingLowContrast.jpg
+		tests\Images\Input\Jpg\baseline\badeof.jpg = tests\Images\Input\Jpg\baseline\badeof.jpg
+		tests\Images\Input\Jpg\baseline\badrst.jpg = tests\Images\Input\Jpg\baseline\badrst.jpg
+		tests\Images\Input\Jpg\baseline\Calliphora.jpg = tests\Images\Input\Jpg\baseline\Calliphora.jpg
+		tests\Images\Input\Jpg\baseline\cmyk.jpg = tests\Images\Input\Jpg\baseline\cmyk.jpg
+		tests\Images\Input\Jpg\baseline\exif.jpg = tests\Images\Input\Jpg\baseline\exif.jpg
+		tests\Images\Input\Jpg\baseline\Floorplan.jpg = tests\Images\Input\Jpg\baseline\Floorplan.jpg
+		tests\Images\Input\Jpg\baseline\gamma_dalai_lama_gray.jpg = tests\Images\Input\Jpg\baseline\gamma_dalai_lama_gray.jpg
+		tests\Images\Input\Jpg\baseline\Hiyamugi.jpg = tests\Images\Input\Jpg\baseline\Hiyamugi.jpg
+		tests\Images\Input\Jpg\baseline\jpeg400jfif.jpg = tests\Images\Input\Jpg\baseline\jpeg400jfif.jpg
+		tests\Images\Input\Jpg\baseline\jpeg420exif.jpg = tests\Images\Input\Jpg\baseline\jpeg420exif.jpg
+		tests\Images\Input\Jpg\baseline\jpeg420small.jpg = tests\Images\Input\Jpg\baseline\jpeg420small.jpg
+		tests\Images\Input\Jpg\baseline\jpeg444.jpg = tests\Images\Input\Jpg\baseline\jpeg444.jpg
+		tests\Images\Input\Jpg\baseline\Lake.jpg = tests\Images\Input\Jpg\baseline\Lake.jpg
+		tests\Images\Input\Jpg\baseline\MultiScanBaselineCMYK.jpg = tests\Images\Input\Jpg\baseline\MultiScanBaselineCMYK.jpg
+		tests\Images\Input\Jpg\baseline\ratio-1x1.jpg = tests\Images\Input\Jpg\baseline\ratio-1x1.jpg
+		tests\Images\Input\Jpg\baseline\Snake.jpg = tests\Images\Input\Jpg\baseline\Snake.jpg
+		tests\Images\Input\Jpg\baseline\testimgint.jpg = tests\Images\Input\Jpg\baseline\testimgint.jpg
+		tests\Images\Input\Jpg\baseline\testorig.jpg = tests\Images\Input\Jpg\baseline\testorig.jpg
+		tests\Images\Input\Jpg\baseline\testorig12.jpg = tests\Images\Input\Jpg\baseline\testorig12.jpg
+		tests\Images\Input\Jpg\baseline\turtle.jpg = tests\Images\Input\Jpg\baseline\turtle.jpg
+		tests\Images\Input\Jpg\baseline\ycck-subsample-1222.jpg = tests\Images\Input\Jpg\baseline\ycck-subsample-1222.jpg
+		tests\Images\Input\Jpg\baseline\ycck.jpg = tests\Images\Input\Jpg\baseline\ycck.jpg
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "JpegSnoopReports", "JpegSnoopReports", "{538F0EBD-4084-4EDB-93DD-6D35B733CA48}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\badeof.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\badeof.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\badrst.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\badrst.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\Calliphora.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\Calliphora.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\cmyk.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\cmyk.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\exif.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\exif.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\Floorplan.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\Floorplan.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\gamma_dalai_lama_gray.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\gamma_dalai_lama_gray.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\Hiyamugi.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\Hiyamugi.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg400jfif.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg400jfif.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg420exif.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg420exif.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg420small.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg420small.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg444.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\jpeg444.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\Lake.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\Lake.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\MultiScanBaselineCMYK.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\MultiScanBaselineCMYK.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\ratio-1x1.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\ratio-1x1.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\Snake.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\Snake.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\testimgint.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\testimgint.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\testorig.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\testorig.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\turtle.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\turtle.jpg.txt
+		tests\Images\Input\Jpg\baseline\JpegSnoopReports\ycck.jpg.txt = tests\Images\Input\Jpg\baseline\JpegSnoopReports\ycck.jpg.txt
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "issues", "issues", "{5C9B689F-B96D-47BE-A208-C23B1B2A8570}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\issues\Issue159-MissingFF00-Progressive-Bedroom.jpg = tests\Images\Input\Jpg\issues\Issue159-MissingFF00-Progressive-Bedroom.jpg
+		tests\Images\Input\Jpg\issues\Issue159-MissingFF00-Progressive-Girl.jpg = tests\Images\Input\Jpg\issues\Issue159-MissingFF00-Progressive-Girl.jpg
+		tests\Images\Input\Jpg\issues\Issue178-BadCoeffsProgressive-Lemon.jpg = tests\Images\Input\Jpg\issues\Issue178-BadCoeffsProgressive-Lemon.jpg
+		tests\Images\Input\Jpg\issues\Issue214-CriticalEOF.jpg = tests\Images\Input\Jpg\issues\Issue214-CriticalEOF.jpg
+		tests\Images\Input\Jpg\issues\Issue385-BadZigZag-Progressive.jpg = tests\Images\Input\Jpg\issues\Issue385-BadZigZag-Progressive.jpg
+		tests\Images\Input\Jpg\issues\Issue394-MultiHuffmanBaseline-Speakers.jpg = tests\Images\Input\Jpg\issues\Issue394-MultiHuffmanBaseline-Speakers.jpg
+		tests\Images\Input\Jpg\issues\Issue517-No-EOI-Progressive.jpg = tests\Images\Input\Jpg\issues\Issue517-No-EOI-Progressive.jpg
+		tests\Images\Input\Jpg\issues\Issue518-Bad-RST-Progressive.jpg = tests\Images\Input\Jpg\issues\Issue518-Bad-RST-Progressive.jpg
+		tests\Images\Input\Jpg\issues\Issue520-InvalidCast.jpg = tests\Images\Input\Jpg\issues\Issue520-InvalidCast.jpg
+		tests\Images\Input\Jpg\issues\Issue624-DhtHasWrongLength-Progressive-N.jpg = tests\Images\Input\Jpg\issues\Issue624-DhtHasWrongLength-Progressive-N.jpg
+		tests\Images\Input\Jpg\issues\Issue694-Decode-Exif-OutOfRange.jpg = tests\Images\Input\Jpg\issues\Issue694-Decode-Exif-OutOfRange.jpg
+		tests\Images\Input\Jpg\issues\Issue695-Invalid-EOI.jpg = tests\Images\Input\Jpg\issues\Issue695-Invalid-EOI.jpg
+		tests\Images\Input\Jpg\issues\Issue696-Resize-Exif-OutOfRange.jpg = tests\Images\Input\Jpg\issues\Issue696-Resize-Exif-OutOfRange.jpg
+		tests\Images\Input\Jpg\issues\Issue721-InvalidAPP0.jpg = tests\Images\Input\Jpg\issues\Issue721-InvalidAPP0.jpg
+		tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-A.jpg = tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-A.jpg
+		tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-B.jpg = tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-B.jpg
+		tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-C.jpg = tests\Images\Input\Jpg\issues\Issue723-Ordered-Interleaved-Progressive-C.jpg
+		tests\Images\Input\Jpg\issues\issue750-exif-load.jpg = tests\Images\Input\Jpg\issues\issue750-exif-load.jpg
+		tests\Images\Input\Jpg\issues\issue750-exif-tranform.jpg = tests\Images\Input\Jpg\issues\issue750-exif-tranform.jpg
+		tests\Images\Input\Jpg\issues\Issue845-Incorrect-Quality99.jpg = tests\Images\Input\Jpg\issues\Issue845-Incorrect-Quality99.jpg
+		tests\Images\Input\Jpg\issues\issue855-incorrect-colorspace.jpg = tests\Images\Input\Jpg\issues\issue855-incorrect-colorspace.jpg
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "fuzz", "fuzz", "{516A3532-6AC2-417B-AD79-9BD5D0D378A0}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\issues\fuzz\Issue797-NullReferenceException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue797-NullReferenceException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue798-AccessViolationException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue798-AccessViolationException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue821-DivideByZeroException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue821-DivideByZeroException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue822-DivideByZeroException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue822-DivideByZeroException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue823-NullReferenceException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue823-NullReferenceException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-A.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-A.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-B.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-B.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-C.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-C.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-D.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-D.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-E.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-E.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-F.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-F.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-G.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-G.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-H.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue824-IndexOutOfRangeException-H.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-A.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-A.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-B.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-B.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-C.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-C.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-D.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue825-ArgumentOutOfRangeException-D.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-A.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-A.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-B.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-B.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-C.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue826-ArgumentException-C.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue827-AccessViolationException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue827-AccessViolationException.jpg
+		tests\Images\Input\Jpg\issues\fuzz\Issue839-ExecutionEngineException.jpg = tests\Images\Input\Jpg\issues\fuzz\Issue839-ExecutionEngineException.jpg
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "JpegSnoopReports", "JpegSnoopReports", "{714CDEA1-9AE6-4F76-B8B1-A7DB8C1DB82F}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue159-MissingFF00-Progressive-Bedroom.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue159-MissingFF00-Progressive-Bedroom.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue159-MissingFF00-Progressive-Girl.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue159-MissingFF00-Progressive-Girl.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue178-BadCoeffsProgressive-Lemon.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue178-BadCoeffsProgressive-Lemon.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue214-CriticalEOF .jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue214-CriticalEOF .jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue385-BadZigZag-Progressive.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue385-BadZigZag-Progressive.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue394-MultiHuffmanBaseline-Speakers.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue394-MultiHuffmanBaseline-Speakers.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue517-No-EOI-Progressive.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue517-No-EOI-Progressive.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue518-Bad-RST-Progressive.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue518-Bad-RST-Progressive.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue520-InvalidCast.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue520-InvalidCast.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue624-DhtHasWrongLength-Progressive-N.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue624-DhtHasWrongLength-Progressive-N.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue694-Decode-Exif-OutOfRange.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue694-Decode-Exif-OutOfRange.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue695-Invalid-EOI.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue695-Invalid-EOI.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue696-Resize-Exif-OutOfRange.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue696-Resize-Exif-OutOfRange.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue721-InvalidAPP0.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue721-InvalidAPP0.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-A.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-A.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-B.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-B.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-C.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\Issue723-Ordered-Interleaved-Progressive-C.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\issue750-exif-load.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\issue750-exif-load.jpg.txt
+		tests\Images\Input\Jpg\issues\JpegSnoopReports\issue750-exif-tranform.jpg.txt = tests\Images\Input\Jpg\issues\JpegSnoopReports\issue750-exif-tranform.jpg.txt
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "progressive", "progressive", "{6458AFCB-A159-47D5-8F2B-50C95C0915E0}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\progressive\BadEofProgressive.jpg = tests\Images\Input\Jpg\progressive\BadEofProgressive.jpg
+		tests\Images\Input\Jpg\progressive\ExifUndefType.jpg = tests\Images\Input\Jpg\progressive\ExifUndefType.jpg
+		tests\Images\Input\Jpg\progressive\fb.jpg = tests\Images\Input\Jpg\progressive\fb.jpg
+		tests\Images\Input\Jpg\progressive\Festzug.jpg = tests\Images\Input\Jpg\progressive\Festzug.jpg
+		tests\Images\Input\Jpg\progressive\progress.jpg = tests\Images\Input\Jpg\progressive\progress.jpg
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "JpegSnoopReports", "JpegSnoopReports", "{39F5197B-CF6C-41A5-9739-7F97E78BB104}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Jpg\progressive\JpegSnoopReports\BadEofProgressive.jpg.txt = tests\Images\Input\Jpg\progressive\JpegSnoopReports\BadEofProgressive.jpg.txt
+		tests\Images\Input\Jpg\progressive\JpegSnoopReports\ExifUndefType.jpg.txt = tests\Images\Input\Jpg\progressive\JpegSnoopReports\ExifUndefType.jpg.txt
+		tests\Images\Input\Jpg\progressive\JpegSnoopReports\fb.jpg.txt = tests\Images\Input\Jpg\progressive\JpegSnoopReports\fb.jpg.txt
+		tests\Images\Input\Jpg\progressive\JpegSnoopReports\Festzug.jpg.txt = tests\Images\Input\Jpg\progressive\JpegSnoopReports\Festzug.jpg.txt
+		tests\Images\Input\Jpg\progressive\JpegSnoopReports\progress.jpg.txt = tests\Images\Input\Jpg\progressive\JpegSnoopReports\progress.jpg.txt
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Png", "Png", "{E1C42A6F-913B-4A7B-B1A8-2BB62843B254}"
+	ProjectSection(SolutionItems) = preProject
+		tests\Images\Input\Png\banner7-adam.png = tests\Images\Input\Png\banner7-adam.png
+		tests\Images\Input\Png\banner8-index.png = tests\Images\Input\Png\banner8-index.png
+		tests\Images\Input\Png\big-corrupted-chunk.png = tests\Images\Input\Png\big-corrupted-chunk.png
+		tests\Images\Input\Png\Bike.png = tests\Images\Input\Png\Bike.png
+		tests\Images\Input\Png\BikeGrayscale.png = tests\Images\Input\Png\BikeGrayscale.png
+		tests\Images\Input\Png\blur.png = tests\Images\Input\Png\blur.png
+		tests\Images\Input\Png\bpp1.png = tests\Images\Input\Png\bpp1.png
+		tests\Images\Input\Png\CalliphoraPartial.png = tests\Images\Input\Png\CalliphoraPartial.png
+		tests\Images\Input\Png\CalliphoraPartialGrayscale.png = tests\Images\Input\Png\CalliphoraPartialGrayscale.png
+		tests\Images\Input\Png\chunklength1.png = tests\Images\Input\Png\chunklength1.png
+		tests\Images\Input\Png\chunklength2.png = tests\Images\Input\Png\chunklength2.png
+		tests\Images\Input\Png\cross.png = tests\Images\Input\Png\cross.png
+		tests\Images\Input\Png\ducky.png = tests\Images\Input\Png\ducky.png
+		tests\Images\Input\Png\filter0.png = tests\Images\Input\Png\filter0.png
+		tests\Images\Input\Png\filter1.png = tests\Images\Input\Png\filter1.png
+		tests\Images\Input\Png\filter2.png = tests\Images\Input\Png\filter2.png
+		tests\Images\Input\Png\filter3.png = tests\Images\Input\Png\filter3.png
+		tests\Images\Input\Png\filter4.png = tests\Images\Input\Png\filter4.png
+		tests\Images\Input\Png\filterVar.png = tests\Images\Input\Png\filterVar.png
+		tests\Images\Input\Png\gray-1-trns.png = tests\Images\Input\Png\gray-1-trns.png
+		tests\Images\Input\Png\gray-16-tRNS-interlaced.png = tests\Images\Input\Png\gray-16-tRNS-interlaced.png
+		tests\Images\Input\Png\gray-16.png = tests\Images\Input\Png\gray-16.png
+		tests\Images\Input\Png\gray-2-tRNS.png = tests\Images\Input\Png\gray-2-tRNS.png
+		tests\Images\Input\Png\gray-4-tRNS.png = tests\Images\Input\Png\gray-4-tRNS.png
+		tests\Images\Input\Png\gray-8-tRNS.png = tests\Images\Input\Png\gray-8-tRNS.png
+		tests\Images\Input\Png\gray-alpha-16.png = tests\Images\Input\Png\gray-alpha-16.png
+		tests\Images\Input\Png\gray-alpha-8.png = tests\Images\Input\Png\gray-alpha-8.png
+		tests\Images\Input\Png\gray_4bpp.png = tests\Images\Input\Png\gray_4bpp.png
+		tests\Images\Input\Png\icon.png = tests\Images\Input\Png\icon.png
+		tests\Images\Input\Png\iftbbn0g01.png = tests\Images\Input\Png\iftbbn0g01.png
+		tests\Images\Input\Png\iftbbn0g02.png = tests\Images\Input\Png\iftbbn0g02.png
+		tests\Images\Input\Png\iftbbn0g04.png = tests\Images\Input\Png\iftbbn0g04.png
+		tests\Images\Input\Png\indexed.png = tests\Images\Input\Png\indexed.png
+		tests\Images\Input\Png\interlaced.png = tests\Images\Input\Png\interlaced.png
+		tests\Images\Input\Png\kaboom.png = tests\Images\Input\Png\kaboom.png
+		tests\Images\Input\Png\low-variance.png = tests\Images\Input\Png\low-variance.png
+		tests\Images\Input\Png\palette-8bpp.png = tests\Images\Input\Png\palette-8bpp.png
+		tests\Images\Input\Png\pd-dest.png = tests\Images\Input\Png\pd-dest.png
+		tests\Images\Input\Png\pd-source.png = tests\Images\Input\Png\pd-source.png
+		tests\Images\Input\Png\pd.png = tests\Images\Input\Png\pd.png
+		tests\Images\Input\Png\pl.png = tests\Images\Input\Png\pl.png
+		tests\Images\Input\Png\pp.png = tests\Images\Input\Png\pp.png
+		tests\Images\Input\Png\rainbow.png = tests\Images\Input\Png\rainbow.png
+		tests\Images\Input\Png\ratio-1x4.png = tests\Images\Input\Png\ratio-1x4.png
+		tests\Images\Input\Png\ratio-4x1.png = tests\Images\Input\Png\ratio-4x1.png
+		tests\Images\Input\Png\rgb-16-alpha.png = tests\Images\Input\Png\rgb-16-alpha.png
+		tests\Images\Input\Png\rgb-16-tRNS.png = tests\Images\Input\Png\rgb-16-tRNS.png
+		tests\Images\Input\Png\rgb-48bpp-interlaced.png = tests\Images\Input\Png\rgb-48bpp-interlaced.png
+		tests\Images\Input\Png\rgb-48bpp.png = tests\Images\Input\Png\rgb-48bpp.png
+		tests\Images\Input\Png\rgb-8-tRNS.png = tests\Images\Input\Png\rgb-8-tRNS.png
+		tests\Images\Input\Png\rollsroyce.png = tests\Images\Input\Png\rollsroyce.png
+		tests\Images\Input\Png\SnakeGame.png = tests\Images\Input\Png\SnakeGame.png
+		tests\Images\Input\Png\splash-interlaced.png = tests\Images\Input\Png\splash-interlaced.png
+		tests\Images\Input\Png\splash.png = tests\Images\Input\Png\splash.png
+		tests\Images\Input\Png\versioning-1_1.png = tests\Images\Input\Png\versioning-1_1.png
+		tests\Images\Input\Png\versioning-1_2.png = tests\Images\Input\Png\versioning-1_2.png
+		tests\Images\Input\Png\vim16x16_1.png = tests\Images\Input\Png\vim16x16_1.png
+		tests\Images\Input\Png\vim16x16_2.png = tests\Images\Input\Png\vim16x16_2.png
+		tests\Images\Input\Png\zlib-overflow.png = tests\Images\Input\Png\zlib-overflow.png
+	EndProjectSection
+EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImageSharp.Tests", "tests\ImageSharp.Tests\ImageSharp.Tests.csproj", "{EA3000E9-2A91-4EC4-8A68-E566DEBDC4F6}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImageSharp.Benchmarks", "tests\ImageSharp.Benchmarks\ImageSharp.Benchmarks.csproj", "{2BF743D8-2A06-412D-96D7-F448F00C5EA5}"
@@ -123,9 +432,25 @@ Global
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
-		{9E574A07-F879-4811-9C41-5CBDC6BAFDB7} = {815C0625-CD3D-440F-9F80-2D83856AB7AE}
+		{FBE8C1AD-5AEC-4514-9B64-091D8E145865} = {1799C43E-5C54-4A8F-8D64-B1475241DB0D}
+		{2B02E303-7CC6-4E15-97EE-DBE86B287553} = {E919DF0B-2607-4462-8FC0-5C98FE50F8C9}
 		{2AA31A1F-142C-43F4-8687-09ABCA4B3A26} = {815C0625-CD3D-440F-9F80-2D83856AB7AE}
 		{2E33181E-6E28-4662-A801-E2E7DC206029} = {815C0625-CD3D-440F-9F80-2D83856AB7AE}
+		{D4C5EC58-F8E6-4636-B9EE-C99D2578E5C6} = {56801022-D71A-4FBE-BC5B-CBA08E2284EC}
+		{FA55F5DE-11A6-487D-ABA4-BC93A02717DD} = {56801022-D71A-4FBE-BC5B-CBA08E2284EC}
+		{9DA226A1-8656-49A8-A58A-A8B5C081AD66} = {FA55F5DE-11A6-487D-ABA4-BC93A02717DD}
+		{1A82C5F6-90E0-4E97-BE16-A825C046B493} = {9DA226A1-8656-49A8-A58A-A8B5C081AD66}
+		{EE3FB0B3-1C31-41E9-93AB-BA800560A868} = {9DA226A1-8656-49A8-A58A-A8B5C081AD66}
+		{BF8DFDC1-CEE5-4A37-B216-D3085360C776} = {EE3FB0B3-1C31-41E9-93AB-BA800560A868}
+		{DB21FED7-E8CB-4B00-9EB2-9144D32A590A} = {9DA226A1-8656-49A8-A58A-A8B5C081AD66}
+		{195BA3D3-3E9F-4BC5-AB40-5F9FEB638146} = {DB21FED7-E8CB-4B00-9EB2-9144D32A590A}
+		{538F0EBD-4084-4EDB-93DD-6D35B733CA48} = {195BA3D3-3E9F-4BC5-AB40-5F9FEB638146}
+		{5C9B689F-B96D-47BE-A208-C23B1B2A8570} = {DB21FED7-E8CB-4B00-9EB2-9144D32A590A}
+		{516A3532-6AC2-417B-AD79-9BD5D0D378A0} = {5C9B689F-B96D-47BE-A208-C23B1B2A8570}
+		{714CDEA1-9AE6-4F76-B8B1-A7DB8C1DB82F} = {5C9B689F-B96D-47BE-A208-C23B1B2A8570}
+		{6458AFCB-A159-47D5-8F2B-50C95C0915E0} = {DB21FED7-E8CB-4B00-9EB2-9144D32A590A}
+		{39F5197B-CF6C-41A5-9739-7F97E78BB104} = {6458AFCB-A159-47D5-8F2B-50C95C0915E0}
+		{E1C42A6F-913B-4A7B-B1A8-2BB62843B254} = {9DA226A1-8656-49A8-A58A-A8B5C081AD66}
 		{EA3000E9-2A91-4EC4-8A68-E566DEBDC4F6} = {56801022-D71A-4FBE-BC5B-CBA08E2284EC}
 		{2BF743D8-2A06-412D-96D7-F448F00C5EA5} = {56801022-D71A-4FBE-BC5B-CBA08E2284EC}
 		{561B880A-D9EE-44EF-90F5-817C54A9D9AB} = {56801022-D71A-4FBE-BC5B-CBA08E2284EC}
diff --git a/NuGet.config b/NuGet.config
deleted file mode 100644
index 322105d4d4..0000000000
--- a/NuGet.config
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <packageSources>
-    <add key="myget.org sixlabors" value="https://www.myget.org/F/sixlabors/api/v3/index.json" />
-    <add key="myget.org dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
-    <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
-  </packageSources>
-</configuration>
\ No newline at end of file
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
new file mode 100644
index 0000000000..cd3d5e8cb3
--- /dev/null
+++ b/src/Directory.Build.props
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.props is automatically picked up and imported by
+    Microsoft.Common.props. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly early and only Sdk.props will have been
+    imported beforehand. We also don't need to add ourselves to
+    MSBuildAllProjects, as that is done by the file that imports us.
+  -->
+
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileDirectory)..\Directory.Build.props</MSBuildAllProjects>
+    <ImageSharpProjectCategory>src</ImageSharpProjectCategory>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)..\Directory.Build.props" />
+
+  <PropertyGroup>
+    <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)..\standards\SixLabors.ruleset</CodeAnalysisRuleSet>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <AdditionalFiles Include="$(MSBuildThisFileDirectory)..\standards\stylecop.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <InternalsVisibleTo Include="DynamicProxyGenAssembly2" PublicKey="0024000004800000940000000602000000240000525341310004000001000100c547cac37abd99c8db225ef2f6c8a3602f3b3606cc9891605d02baa56104f4cfc0734aa39b93bf7852f7d9266654753cc297e7d2edfe0bac1cdcf9f717241550e0a7b191195b7667bb4f64bcb8e2121380fd1d9d46ad2d92d2d15605093924cceaf74c4861eff62abf69b9291ed0a340e113be11e6a7d3113e92484cf7045cc7" />
+    <InternalsVisibleTo Include="DynamicProxyGenAssembly2, PublicKeyToken=null" />
+    <InternalsVisibleTo Include="ImageSharp.Benchmarks" />
+    <InternalsVisibleTo Include="SixLabors.ImageSharp.Sandbox46" />
+    <InternalsVisibleTo Include="SixLabors.ImageSharp.Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="StyleCop.Analyzers" PrivateAssets="All" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/Directory.Build.targets b/src/Directory.Build.targets
new file mode 100644
index 0000000000..c0e01ae586
--- /dev/null
+++ b/src/Directory.Build.targets
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.targets is automatically picked up and imported by
+    Microsoft.Common.targets. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly late and most other props/targets will have
+    been imported beforehand. We also don't need to add ourselves to
+    MSBuildAllProjects, as that is done by the file that imports us.
+  -->
+
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileDirectory)..\Directory.Build.targets</MSBuildAllProjects>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)..\Directory.Build.targets" />
+
+  <PropertyGroup>
+    <GeneratedInternalsVisibleToFile Condition="'$(GeneratedInternalsVisibleToFile)' == ''">$(IntermediateOutputPath)$(MSBuildProjectName).InternalsVisibleTo$(DefaultLanguageSourceExtension)</GeneratedInternalsVisibleToFile>
+  </PropertyGroup>
+
+  <ItemDefinitionGroup>
+    <InternalsVisibleTo>
+      <Visible>false</Visible>
+    </InternalsVisibleTo>
+  </ItemDefinitionGroup>
+
+  <Target Name="GenerateInternalsVisibleTo"
+          BeforeTargets="CoreCompile"
+          DependsOnTargets="PrepareForBuild;CoreGenerateInternalsVisibleTo"
+          Condition="'@(InternalsVisibleTo)' != ''" />
+
+  <Target Name="CoreGenerateInternalsVisibleTo"
+          Condition="'$(Language)' == 'VB' or '$(Language)' == 'C#'"
+          Inputs="$(MSBuildAllProjects)"
+          Outputs="$(GeneratedInternalsVisibleToFile)">
+    <CreateItem Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute" AdditionalMetadata="_Parameter1=%(InternalsVisibleTo.Identity)" Condition="'%(InternalsVisibleTo.PublicKey)' == ''">
+      <Output TaskParameter="Include" ItemName="InternalsVisibleToAttribute" />
+    </CreateItem>
+    <CreateItem Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute" AdditionalMetadata="_Parameter1=%(InternalsVisibleTo.Identity), PublicKey=%(InternalsVisibleTo.PublicKey)" Condition="'%(InternalsVisibleTo.PublicKey)' != ''">
+      <Output TaskParameter="Include" ItemName="InternalsVisibleToAttribute" />
+    </CreateItem>
+
+    <WriteCodeFragment AssemblyAttributes="@(InternalsVisibleToAttribute)" Language="$(Language)" OutputFile="$(GeneratedInternalsVisibleToFile)">
+      <Output TaskParameter="OutputFile" ItemName="Compile" />
+      <Output TaskParameter="OutputFile" ItemName="FileWrites" />
+    </WriteCodeFragment>
+  </Target>
+
+  <!-- Empty target so that `dotnet test` will work on the solution -->
+  <!-- https://github.com/Microsoft/vstest/issues/411 -->
+  <Target Name="VSTest" />
+
+</Project>
diff --git a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
index f9181b45da..a092e3604b 100644
--- a/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
+++ b/src/ImageSharp.Drawing/ImageSharp.Drawing.csproj
@@ -1,55 +1,23 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
+    <AssemblyName>SixLabors.ImageSharp.Drawing</AssemblyName>
     <AssemblyTitle>SixLabors.ImageSharp.Drawing</AssemblyTitle>
-    <Authors>SixLabors and contributors</Authors>
-    <Company>Six Labors</Company>
-    <Copyright>Copyright (c) Six Labors and contributors.</Copyright>
-    <Product>SixLabors.ImageSharp</Product>
     <Description>An extension to ImageSharp that allows the drawing of images, paths, and text.</Description>
-    <NeutralLanguage>en</NeutralLanguage>
-
-    <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
-    <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
-    
-    <LangVersion>7.3</LangVersion>
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <AssemblyName>SixLabors.ImageSharp.Drawing</AssemblyName>
     <PackageId>SixLabors.ImageSharp.Drawing</PackageId>
     <PackageTags>Image Draw Shape Path Font</PackageTags>
-    <PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Branding/master/icons/imagesharp/sixlabors.imagesharp.128.png</PackageIconUrl>
-    <PackageProjectUrl>https://github.com/SixLabors/ImageSharp</PackageProjectUrl>
-    <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
-    <RepositoryType>git</RepositoryType>
-    <RepositoryUrl>https://github.com/SixLabors/ImageSharp</RepositoryUrl>
-    <DebugType Condition="$(codecov) != ''">full</DebugType>
-    <DebugType Condition="$(codecov) == ''">portable</DebugType>
-    <DebugSymbols>True</DebugSymbols>
+    <RootNamespace>SixLabors.ImageSharp</RootNamespace>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Include="..\Shared\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
+    <PackageReference Include="SixLabors.Fonts" />
+    <PackageReference Include="SixLabors.Shapes" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\ImageSharp\ImageSharp.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <AdditionalFiles Include="..\..\standards\stylecop.json" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
-    <PackageReference Include="SixLabors.Fonts" Version="1.0.0-beta0008" />
-    <PackageReference Include="SixLabors.Shapes" Version="1.0.0-beta0008" />
-  </ItemGroup>
-
-  <PropertyGroup>
-    <CodeAnalysisRuleSet>..\..\standards\SixLabors.ruleset</CodeAnalysisRuleSet>
-    <RootNamespace>SixLabors.ImageSharp</RootNamespace>
-  </PropertyGroup>
-
-  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-  </PropertyGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/ImageSharp.Drawing/Properties/AssemblyInfo.cs b/src/ImageSharp.Drawing/Properties/AssemblyInfo.cs
deleted file mode 100644
index 2891598b9b..0000000000
--- a/src/ImageSharp.Drawing/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,4 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-// Common values read from `AssemblyInfo.Common.cs`
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index 832a6ce3f9..a3d614a067 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -1,33 +1,14 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
+    <AssemblyName>SixLabors.ImageSharp</AssemblyName>
     <AssemblyTitle>SixLabors.ImageSharp</AssemblyTitle>
-    <Authors>Six Labors and contributors</Authors>
-    <Company>Six Labors</Company>
-    <Copyright>Copyright (c) Six Labors and contributors.</Copyright>
-    <Product>SixLabors.ImageSharp</Product>
     <Description>A cross-platform library for the processing of image files; written in C#</Description>
-    <NeutralLanguage>en</NeutralLanguage>
-
-    <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
-    <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
-
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
-      
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <AssemblyName>SixLabors.ImageSharp</AssemblyName>
     <PackageId>SixLabors.ImageSharp</PackageId>
     <PackageTags>Image Resize Crop Gif Jpg Jpeg Bitmap Png Core</PackageTags>
-    <PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Branding/master/icons/imagesharp/sixlabors.imagesharp.128.png</PackageIconUrl>
-    <PackageProjectUrl>https://github.com/SixLabors/ImageSharp</PackageProjectUrl>
-    <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
-    <RepositoryType>git</RepositoryType>
-    <RepositoryUrl>https://github.com/SixLabors/ImageSharp</RepositoryUrl>
-    <DebugType Condition="$(codecov) != ''">full</DebugType>
-    <DebugType Condition="$(codecov) == ''">portable</DebugType>
-    <DebugSymbols>True</DebugSymbols>
-    <Features>IOperation</Features>
-    <LangVersion>7.3</LangVersion>
+    <RootNamespace>SixLabors.ImageSharp</RootNamespace>
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.1' OR '$(TargetFramework)' == 'net472' ">
@@ -35,93 +16,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Include="..\Shared\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <AdditionalFiles Include="..\..\standards\stylecop.json" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
-    <PackageReference Include="SixLabors.Core" Version="1.0.0-dev000101" />
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
-  </ItemGroup>
-
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3'">
-    <PackageReference Include="System.IO.UnmanagedMemoryStream" Version="4.3.0" />
-    <PackageReference Include="System.IO.Compression" Version="4.3.0" />
-    <PackageReference Include="System.Threading.Tasks.Parallel" Version="4.3.0" />
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-  </ItemGroup>
-
-  <PropertyGroup>
-    <CodeAnalysisRuleSet>..\..\standards\SixLabors.ruleset</CodeAnalysisRuleSet>
-    <RootNamespace>SixLabors.ImageSharp</RootNamespace>
-  </PropertyGroup>
-
-  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <None Update="Formats\Jpeg\Components\Block8x8F.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Block8x8F.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="Formats\Jpeg\Components\GenericBlock8x8.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>GenericBlock8x8.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="Formats\Jpeg\Components\Block8x8F.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Block8x8F.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelOperations{TPixel}.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>PixelOperations{TPixel}.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Argb32.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Argb32.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Bgr24.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Bgr24.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Bgra32.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Bgra32.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Gray8.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Gray8.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Gray16.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Gray16.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Rgb24.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Rgb24.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Rgba32.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Rgba32.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Rgb48.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Rgb48.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelImplementations\Generated\Rgba64.PixelOperations.Generated.tt">
-      <Generator>TextTemplatingFileGenerator</Generator>
-      <LastGenOutput>Rgba64.PixelOperations.Generated.cs</LastGenOutput>
-    </None>
-    <None Update="PixelFormats\PixelBlenders\PorterDuffFunctions.Generated.tt">
-      <LastGenOutput>PorterDuffFunctions.Generated.cs</LastGenOutput>
-      <Generator>TextTemplatingFileGenerator</Generator>
-    </None>
-    <None Update="PixelFormats\PixelBlenders\DefaultPixelBlenders.Generated.tt">
-      <LastGenOutput>DefaultPixelBlenders.Generated.cs</LastGenOutput>
-      <Generator>TextTemplatingFileGenerator</Generator>
-    </None>
+    <Compile Include="..\Shared\*.cs" />
   </ItemGroup>
 
   <ItemGroup>
@@ -203,6 +98,87 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
+    <InternalsVisibleTo Include="SixLabors.ImageSharp.Drawing" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="Formats\Jpeg\Components\Block8x8F.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Block8x8F.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="Formats\Jpeg\Components\GenericBlock8x8.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>GenericBlock8x8.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="Formats\Jpeg\Components\Block8x8F.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Block8x8F.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelOperations{TPixel}.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>PixelOperations{TPixel}.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Argb32.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Argb32.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Bgr24.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Bgr24.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Bgra32.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Bgra32.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Gray8.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Gray8.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Gray16.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Gray16.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Rgb24.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Rgb24.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Rgba32.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Rgba32.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Rgb48.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Rgb48.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelImplementations\Generated\Rgba64.PixelOperations.Generated.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>Rgba64.PixelOperations.Generated.cs</LastGenOutput>
+    </None>
+    <None Update="PixelFormats\PixelBlenders\PorterDuffFunctions.Generated.tt">
+      <LastGenOutput>PorterDuffFunctions.Generated.cs</LastGenOutput>
+      <Generator>TextTemplatingFileGenerator</Generator>
+    </None>
+    <None Update="PixelFormats\PixelBlenders\DefaultPixelBlenders.Generated.tt">
+      <LastGenOutput>DefaultPixelBlenders.Generated.cs</LastGenOutput>
+      <Generator>TextTemplatingFileGenerator</Generator>
+    </None>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="StyleCop.Analyzers" PrivateAssets="All" />
+    <PackageReference Include="SixLabors.Core" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" />
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3'">
+    <PackageReference Include="System.IO.Compression" />
+    <PackageReference Include="System.IO.UnmanagedMemoryStream" />
+    <PackageReference Include="System.Threading.Tasks.Parallel" />
+    <PackageReference Include="System.ValueTuple" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+
+  <ItemGroup>
+    <Service Include="{508349B6-6B84-4DF5-91F0-309BEEBAD82D}" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/ImageSharp/Properties/AssemblyInfo.cs b/src/ImageSharp/Properties/AssemblyInfo.cs
index f4459887f0..2862b45851 100644
--- a/src/ImageSharp/Properties/AssemblyInfo.cs
+++ b/src/ImageSharp/Properties/AssemblyInfo.cs
@@ -3,12 +3,9 @@
 
 using System.Runtime.CompilerServices;
 
-// Ensure the other projects can see the internal helpers
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Drawing")]
-
 // Redundant suppressing of SA1413 for Rider.
 [assembly:
     System.Diagnostics.CodeAnalysis.SuppressMessage(
         "StyleCop.CSharp.MaintainabilityRules",
         "SA1413:UseTrailingCommasInMultiLineInitializers",
-        Justification = "Follows SixLabors.ruleset")]
\ No newline at end of file
+        Justification = "Follows SixLabors.ruleset")]
diff --git a/src/Shared/AssemblyInfo.Common.cs b/src/Shared/AssemblyInfo.Common.cs
deleted file mode 100644
index 82e1dac6c4..0000000000
--- a/src/Shared/AssemblyInfo.Common.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Reflection;
-using System.Resources;
-using System.Runtime.CompilerServices;
-
-// Ensure the internals can be built and tested.
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Drawing")]
-[assembly: InternalsVisibleTo("ImageSharp.Benchmarks")]
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Tests")]
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Sandbox46")]
-
-[assembly: InternalsVisibleTo("DynamicProxyGenAssembly2, PublicKey=0024000004800000940000000602000000240000525341310004000001000100c547cac37abd99c8db225ef2f6c8a3602f3b3606cc9891605d02baa56104f4cfc0734aa39b93bf7852f7d9266654753cc297e7d2edfe0bac1cdcf9f717241550e0a7b191195b7667bb4f64bcb8e2121380fd1d9d46ad2d92d2d15605093924cceaf74c4861eff62abf69b9291ed0a340e113be11e6a7d3113e92484cf7045cc7")]
-[assembly: InternalsVisibleTo("DynamicProxyGenAssembly2, PublicKeyToken=null")]
diff --git a/tests/Directory.Build.props b/tests/Directory.Build.props
new file mode 100644
index 0000000000..97bd9b6e7c
--- /dev/null
+++ b/tests/Directory.Build.props
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.props is automatically picked up and imported by
+    Microsoft.Common.props. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly early and only Sdk.props will have been
+    imported beforehand. We also don't need to add ourselves to
+    MSBuildAllProjects, as that is done by the file that imports us.
+  -->
+
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileDirectory)..\Directory.Build.props</MSBuildAllProjects>
+    <ImageSharpProjectCategory>tests</ImageSharpProjectCategory>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <NoWarn>CS0618;$(NoWarn)</NoWarn>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)..\Directory.Build.props" />
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" IsImplicitlyDefined="true" />
+    <PackageReference Include="xunit" IsImplicitlyDefined="true" />
+    <PackageReference Include="xunit.runner.visualstudio" IsImplicitlyDefined="true" />
+  </ItemGroup>
+
+</Project>
diff --git a/tests/Directory.Build.targets b/tests/Directory.Build.targets
new file mode 100644
index 0000000000..f8a4936e23
--- /dev/null
+++ b/tests/Directory.Build.targets
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+
+  <!--
+    Directory.Build.targets is automatically picked up and imported by
+    Microsoft.Common.targets. This file needs to exist, even if empty so that
+    files in the parent directory tree, with the same name, are not imported
+    instead. The import fairly late and most other props/targets will have
+    been imported beforehand. We also don't need to add ourselves to
+    MSBuildAllProjects, as that is done by the file that imports us.
+  -->
+
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileDirectory)..\Directory.Build.targets</MSBuildAllProjects>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)..\Directory.Build.targets" />
+
+</Project>
diff --git a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
index 2a5408da17..1e951f5d0e 100644
--- a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
+++ b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
@@ -1,29 +1,37 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <!--<TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>-->
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <AssemblyName>ImageSharp.Benchmarks</AssemblyName>
     <OutputType>Exe</OutputType>
-    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <RootNamespace>SixLabors.ImageSharp.Benchmarks</RootNamespace>
-    <AssemblyName>ImageSharp.Benchmarks</AssemblyName>
-    <LangVersion>7.3</LangVersion>
+    <TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(TargetFramework)'=='net461'">
+
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
     <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
+
   <ItemGroup>
     <Compile Include="..\ImageSharp.Tests\TestImages.cs" Link="Tests\TestImages.cs" />
     <Compile Include="..\ImageSharp.Tests\TestUtilities\TestEnvironment.cs" Link="Tests\TestEnvironment.cs" />
   </ItemGroup>
-  <ItemGroup>    
-    <PackageReference Include="BenchmarkDotNet" Version="0.11.5" />
-    <PackageReference Include="Colourful" Version="2.0.2" />
-    <PackageReference Include="SixLabors.Shapes.Text" Version="1.0.0-beta0007" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.1'">
+    <Compile Remove="Program.cs" />
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" />
+    <PackageReference Include="Colourful" />
+    <PackageReference Include="SixLabors.Shapes.Text" />
+    <PackageReference Include="System.Drawing.Common" />
+  </ItemGroup>
+
   <ItemGroup>
-    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
     <ProjectReference Include="..\..\src\ImageSharp\ImageSharp.csproj" />
+    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj b/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
index 6569dc002e..fc94668e11 100644
--- a/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
+++ b/tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj
@@ -1,30 +1,28 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net472</TargetFramework>
-    <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
-    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
-    <Prefer32Bit>false</Prefer32Bit>
     <AssemblyName>SixLabors.ImageSharp.Sandbox46</AssemblyName>
     <Description>A cross-platform library for processing of image files written in C#</Description>
-    <Copyright>Copyright © James Jackson-South and contributors.</Copyright>
-    <Authors>James Jackson-South and contributors</Authors>
-    <Company>James Jackson-South</Company>
+    <OutputType>Exe</OutputType>
+    <Prefer32Bit>false</Prefer32Bit>
     <RootNamespace>SixLabors.ImageSharp.Sandbox46</RootNamespace>
-    <LangVersion>7.3</LangVersion>
+    <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
+    <TargetFramework>net472</TargetFramework>
   </PropertyGroup>
+
   <ItemGroup>
-    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
-    <ProjectReference Include="..\..\src\ImageSharp\ImageSharp.csproj" />
+    <Compile Include="..\ImageSharp.Tests\**\*.cs" Link="Tests\%(RecursiveDir)%(Filename)%(Extension)" />
   </ItemGroup>
+
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.9.0.1" />
-    <PackageReference Include="xunit" Version="2.3.1" />
-    <PackageReference Include="Moq" Version="4.10.0" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" />
+    <PackageReference Include="Moq" />
   </ItemGroup>
+
   <ItemGroup>
-    <Compile Include="..\ImageSharp.Tests\**\*.cs" Exclude="bin\**;obj\**" Link="Tests\%(RecursiveDir)%(Filename)%(Extension)" />
-    <Compile Remove="..\ImageSharp.Tests\obj\**\*.cs" />
-    <Compile Remove="..\ImageSharp.Tests\bin\**\*.cs" />
+    <ProjectReference Include="..\..\src\ImageSharp\ImageSharp.csproj" />
+    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/tests/ImageSharp.Sandbox46/Properties/AssemblyInfo.cs b/tests/ImageSharp.Sandbox46/Properties/AssemblyInfo.cs
deleted file mode 100644
index a10fc12fe7..0000000000
--- a/tests/ImageSharp.Sandbox46/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-
-// Setting ComVisible to false makes the types in this assembly not visible
-// to COM components.  If you need to access a type in this assembly from
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("96188137-5fa6-4924-ab6e-4eff79c6e0bb")]
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 0b727f30ce..406719ab4f 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -1,48 +1,24 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
-    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
-    <LangVersion>latest</LangVersion>
-    <DebugType Condition="$(codecov) != ''">full</DebugType>
-    <DebugType Condition="$(codecov) == ''">portable</DebugType>
-    <DebugSymbols>True</DebugSymbols>
-    <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
     <AssemblyName>SixLabors.ImageSharp.Tests</AssemblyName>
     <Platforms>AnyCPU;x64;x86</Platforms>
+    <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
-    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
-    <WarningsAsErrors />
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x86'">
-    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
-    <WarningsAsErrors />
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
-    <WarningsAsErrors />
-  </PropertyGroup>
+
   <ItemGroup>
-    <None Include="PixelFormats\PixelOperationsTests.Blender.cs" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" />
+    <PackageReference Include="Moq" />
+    <PackageReference Include="System.Drawing.Common" />
+    <PackageReference Include="xunit.runner.console" />
   </ItemGroup>
-  
+
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.12.0" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
-    <PackageReference Include="xunit" Version="2.3.1" />
-    <PackageReference Include="xunit.runner.console" Version="2.3.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
-    <PackageReference Include="Moq" Version="4.10.0" />
-  </ItemGroup>
-  <ItemGroup>
-    <AdditionalFiles Include="..\..\stylecop.json" />
-    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
-    <ProjectReference Include="..\..\src\ImageSharp\ImageSharp.csproj" />
-  </ItemGroup>
-  <ItemGroup>
-    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
+    <DotNetCliToolReference Include="dotnet-xunit" />
   </ItemGroup>
+
   <ItemGroup>
     <None Update="TestFonts\OpenSans-Regular.ttf">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
@@ -54,4 +30,11 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\ImageSharp\ImageSharp.csproj" />
+    <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
+  </ItemGroup>
+
 </Project>
+

From 4a41c5b4efe85f56e95d8b7b9294036f6860d1bf Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 4 Jun 2019 13:26:39 +1000
Subject: [PATCH 212/223] Fix build/test (#923)

---
 Directory.Build.props   | 3 ++-
 Directory.Build.targets | 2 +-
 standards               | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Directory.Build.props b/Directory.Build.props
index 9c92c14b8a..6e3cc9b3bf 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -30,8 +30,9 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
+  <!--TODO: Check what this is testing for and why does it fail?-->
   <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
-    <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
+    <CheckForOverflowUnderflow>false</CheckForOverflowUnderflow>
   </PropertyGroup>
 
   <!-- Default settings that explicitly differ from the Sdk.targets defaults-->
diff --git a/Directory.Build.targets b/Directory.Build.targets
index 3504398794..d1183e5d46 100644
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@@ -25,7 +25,7 @@
     <PackageReference Update="BenchmarkDotNet" Version="0.11.5" />
     <PackageReference Update="Colourful" Version="2.0.2" />
     <PackageReference Update="Magick.NET-Q16-AnyCPU" Version="7.12.0" />
-    <PackageReference Update="Microsoft.Net.Compilers.Toolset" Version="3.1.0-beta2-final" />
+    <PackageReference Update="Microsoft.Net.Compilers.Toolset" Version="3.1.0" />
     <PackageReference Update="Microsoft.NET.Test.Sdk" Version="15.9.0" />
     <PackageReference Update="Moq" Version="4.10.0" />
     <PackageReference Update="SixLabors.Core" Version="1.0.0-dev000101" />
diff --git a/standards b/standards
index dd83f64963..8b085c0ec4 160000
--- a/standards
+++ b/standards
@@ -1 +1 @@
-Subproject commit dd83f649638c6333984a757c01be6ec294e6b63c
+Subproject commit 8b085c0ec4fb64797b9965741f7138f8f66a6b44

From 4f76e3b49c60c14857879ed9e4eecacb98edfbbf Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 4 Jun 2019 15:41:45 +1000
Subject: [PATCH 213/223] Prevent zigzag overflow. Fix #922

---
 .../Formats/Jpeg/Components/ZigZag.cs         | 45 +++++++++++--------
 .../Formats/Jpg/ZigZagTests.cs                | 44 ++++++++++++++++++
 2 files changed, 70 insertions(+), 19 deletions(-)
 create mode 100644 tests/ImageSharp.Tests/Formats/Jpg/ZigZagTests.cs

diff --git a/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs b/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
index a3701f2c1b..250e98c02c 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -19,30 +19,37 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// <summary>
         /// Copy of <see cref="Unzig"/> in a value type
         /// </summary>
-        public fixed byte Data[64];
+        public fixed byte Data[64 + 16];
 
         /// <summary>
+        /// <para>
         /// Unzig maps from the zigzag ordering to the natural ordering. For example,
         /// unzig[3] is the column and row of the fourth element in zigzag order. The
         /// value is 16, which means first column (16%8 == 0) and third row (16/8 == 2).
+        /// </para>
+        /// <para>
+        /// When reading corrupted data, the Huffman decoders could attempt
+        /// to reference an entry beyond the end of this array (if the decoded
+        /// zero run length reaches past the end of the block).  To prevent
+        /// wild stores without adding an inner-loop test, we put some extra
+        /// "63"s after the real entries.  This will cause the extra coefficient
+        /// to be stored in location 63 of the block, not somewhere random.
+        /// The worst case would be a run-length of 15, which means we need 16
+        /// fake entries.
+        /// </para>
         /// </summary>
         private static readonly byte[] Unzig =
         {
-            0,
-            1, 8,
-            16, 9, 2,
-            3, 10, 17, 24,
-            32, 25, 18, 11, 4,
-            5, 12, 19, 26, 33, 40,
-            48, 41, 34, 27, 20, 13, 6,
-            7, 14, 21, 28, 35, 42, 49, 56,
-            57, 50, 43, 36, 29, 22, 15,
-            23, 30, 37, 44, 51, 58,
-            59, 52, 45, 38, 31,
-            39, 46, 53, 60,
-            61, 54, 47,
-            55, 62,
-            63
+            0,  1,  8, 16,  9,  2,  3, 10,
+            17, 24, 32, 25, 18, 11,  4,  5,
+            12, 19, 26, 33, 40, 48, 41, 34,
+            27, 20, 13,  6,  7, 14, 21, 28,
+            35, 42, 49, 56, 57, 50, 43, 36,
+            29, 22, 15, 23, 30, 37, 44, 51,
+            58, 59, 52, 45, 38, 31, 39, 46,
+            53, 60, 61, 54, 47, 55, 62, 63,
+            63, 63, 63, 63, 63, 63, 63, 63, // Extra entries for safety in decoder
+            63, 63, 63, 63, 63, 63, 63, 63
         };
 
         /// <summary>
@@ -68,7 +75,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             ZigZag result = default;
             byte* unzigPtr = result.Data;
-            Marshal.Copy(Unzig, 0, (IntPtr)unzigPtr, 64);
+            Marshal.Copy(Unzig, 0, (IntPtr)unzigPtr, 64 + 16);
             return result;
         }
 
@@ -87,4 +94,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
             return result;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/ZigZagTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/ZigZagTests.cs
new file mode 100644
index 0000000000..e59584991e
--- /dev/null
+++ b/tests/ImageSharp.Tests/Formats/Jpg/ZigZagTests.cs
@@ -0,0 +1,44 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Formats.Jpeg.Components;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Formats.Jpg
+{
+    public class ZigZagTests
+    {
+        [Fact]
+        public void ZigZagCanHandleAllPossibleCoefficients()
+        {
+            // Mimic the behaviour of the huffman scan decoder using all possible byte values
+            short[] block = new short[64];
+            var zigzag = ZigZag.CreateUnzigTable();
+
+            for (int h = 0; h < 255; h++)
+            {
+                for (int i = 1; i < 64; i++)
+                {
+                    int s = h;
+                    int r = s >> 4;
+                    s &= 15;
+
+                    if (s != 0)
+                    {
+                        i += r;
+                        block[zigzag[i++]] = (short)s;
+                    }
+                    else
+                    {
+                        if (r == 0)
+                        {
+                            break;
+                        }
+
+                        i += 16;
+                    }
+                }
+            }
+        }
+    }
+}

From 52b30d262acadf1e459a1c5c4c982f022a6197b8 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 4 Jun 2019 20:39:55 +1000
Subject: [PATCH 214/223] Add test image and use constants

---
 .../Formats/Jpeg/Components/ZigZag.cs         | 29 ++++++++++---------
 .../Formats/Jpg/JpegDecoderTests.Images.cs    |  3 +-
 tests/ImageSharp.Tests/TestImages.cs          |  3 +-
 .../Issue922-AccessViolationException.jpg     |  3 ++
 4 files changed, 22 insertions(+), 16 deletions(-)
 create mode 100644 tests/Images/Input/Jpg/issues/fuzz/Issue922-AccessViolationException.jpg

diff --git a/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs b/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
index 250e98c02c..059e2052b3 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/ZigZag.cs
@@ -17,17 +17,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
     internal unsafe struct ZigZag
     {
         /// <summary>
-        /// Copy of <see cref="Unzig"/> in a value type
-        /// </summary>
-        public fixed byte Data[64 + 16];
-
-        /// <summary>
-        /// <para>
-        /// Unzig maps from the zigzag ordering to the natural ordering. For example,
-        /// unzig[3] is the column and row of the fourth element in zigzag order. The
-        /// value is 16, which means first column (16%8 == 0) and third row (16/8 == 2).
-        /// </para>
-        /// <para>
         /// When reading corrupted data, the Huffman decoders could attempt
         /// to reference an entry beyond the end of this array (if the decoded
         /// zero run length reaches past the end of the block).  To prevent
@@ -36,9 +25,21 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// to be stored in location 63 of the block, not somewhere random.
         /// The worst case would be a run-length of 15, which means we need 16
         /// fake entries.
-        /// </para>
+        /// </summary>
+        private const int Size = 64 + 16;
+
+        /// <summary>
+        /// Copy of <see cref="Unzig"/> in a value type
+        /// </summary>
+        public fixed byte Data[Size];
+
+        /// <summary>
+        /// Unzig maps from the zigzag ordering to the natural ordering. For example,
+        /// unzig[3] is the column and row of the fourth element in zigzag order. The
+        /// value is 16, which means first column (16%8 == 0) and third row (16/8 == 2).
         /// </summary>
         private static readonly byte[] Unzig =
+        new byte[Size]
         {
             0,  1,  8, 16,  9,  2,  3, 10,
             17, 24, 32, 25, 18, 11,  4,  5,
@@ -75,7 +76,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             ZigZag result = default;
             byte* unzigPtr = result.Data;
-            Marshal.Copy(Unzig, 0, (IntPtr)unzigPtr, 64 + 16);
+            Marshal.Copy(Unzig, 0, (IntPtr)unzigPtr, Size);
             return result;
         }
 
@@ -86,7 +87,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         {
             Block8x8F result = default;
 
-            for (int i = 0; i < 64; i++)
+            for (int i = 0; i < Block8x8F.Size; i++)
             {
                 result[Unzig[i]] = qt[i];
             }
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 442fcb3d12..d428000efe 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -17,6 +17,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
 
                 // BUG: The following image has a high difference compared to the expected output:
                 // TestImages.Jpeg.Baseline.Jpeg420Small,
+                // TestImages.Jpeg.Issues.Fuzz.AccessViolationException922,
 
                 TestImages.Jpeg.Baseline.Jpeg444,
                 TestImages.Jpeg.Baseline.Bad.BadEOF,
@@ -106,4 +107,4 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 [TestImages.Jpeg.Progressive.Bad.ExifUndefType] = 0.011f / 100,
             };
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 62b7ae2ec0..d8e8719ba1 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.Linq;
@@ -202,6 +202,7 @@ namespace SixLabors.ImageSharp.Tests
                     public const string ArgumentException826C = "Jpg/issues/fuzz/Issue826-ArgumentException-C.jpg";
                     public const string AccessViolationException827 = "Jpg/issues/fuzz/Issue827-AccessViolationException.jpg";
                     public const string ExecutionEngineException839 = "Jpg/issues/fuzz/Issue839-ExecutionEngineException.jpg";
+                    public const string AccessViolationException922 = "Jpg/issues/fuzz/Issue922-AccessViolationException.jpg";
                 }
             }
 
diff --git a/tests/Images/Input/Jpg/issues/fuzz/Issue922-AccessViolationException.jpg b/tests/Images/Input/Jpg/issues/fuzz/Issue922-AccessViolationException.jpg
new file mode 100644
index 0000000000..ef43dc2cfe
--- /dev/null
+++ b/tests/Images/Input/Jpg/issues/fuzz/Issue922-AccessViolationException.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:52fc6235c184f33d2c817d65f737e2dfe695615ebc79589d8d3d78f6a0af0469
+size 1768097

From 8b7a4dacf0c3f161fadeddcf2ce04e0347a71217 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Wed, 5 Jun 2019 00:00:18 +1000
Subject: [PATCH 215/223] Improve robustness of huffman decoder.

---
 Directory.Build.props                         |  5 +-
 .../Components/Decoder/HuffmanScanBuffer.cs   | 77 ++++++++++---------
 .../Components/Decoder/HuffmanScanDecoder.cs  | 24 ++++--
 .../Formats/Jpg/JpegDecoderTests.Images.cs    |  4 +
 4 files changed, 67 insertions(+), 43 deletions(-)

diff --git a/Directory.Build.props b/Directory.Build.props
index 6e3cc9b3bf..bf004921ea 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -27,9 +27,12 @@
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <SignAssembly>false</SignAssembly>
     <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  
   <!--TODO: Check what this is testing for and why does it fail?-->
   <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
     <CheckForOverflowUnderflow>false</CheckForOverflowUnderflow>
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
index 72bfa38646..dd5160414e 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.Runtime.CompilerServices;
@@ -19,8 +19,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         // The number of valid bits left to read in the buffer.
         private int remain;
 
-        // Whether there is more data to pull from the stream for the current mcu.
-        private bool noMore;
+        // Whether there is no more good data to pull from the stream for the current mcu.
+        private bool badData;
 
         public HuffmanScanBuffer(DoubleBufferedStreamReader stream)
         {
@@ -30,29 +30,29 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             this.Marker = JpegConstants.Markers.XFF;
             this.MarkerPosition = 0;
             this.BadMarker = false;
-            this.noMore = false;
-            this.Eof = false;
+            this.badData = false;
+            this.NoData = false;
         }
 
         /// <summary>
-        /// Gets or sets the current, if any, marker in the input stream.
+        /// Gets the current, if any, marker in the input stream.
         /// </summary>
-        public byte Marker { get; set; }
+        public byte Marker { get; private set; }
 
         /// <summary>
-        /// Gets or sets the opening position of an identified marker.
+        /// Gets the opening position of an identified marker.
         /// </summary>
-        public long MarkerPosition { get; set; }
+        public long MarkerPosition { get; private set; }
 
         /// <summary>
-        /// Gets or sets a value indicating whether we have a bad marker, I.E. One that is not between RST0 and RST7
+        /// Gets a value indicating whether a bad marker has been detected, I.E. One that is not between RST0 and RST7
         /// </summary>
-        public bool BadMarker { get; set; }
+        public bool BadMarker { get; private set; }
 
         /// <summary>
-        /// Gets or sets a value indicating whether we have prematurely reached the end of the file.
+        /// Gets a value indicating whether to continue reading the input stream.
         /// </summary>
-        public bool Eof { get; set; }
+        public bool NoData { get; private set; }
 
         [MethodImpl(InliningOptions.ShortMethod)]
         public void CheckBits()
@@ -71,8 +71,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             this.Marker = JpegConstants.Markers.XFF;
             this.MarkerPosition = 0;
             this.BadMarker = false;
-            this.noMore = false;
-            this.Eof = false;
+            this.badData = false;
+            this.NoData = false;
         }
 
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -141,39 +141,28 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             ulong temp = 0;
             for (int i = 0; i < 6; i++)
             {
-                int b = this.noMore ? 0 : this.stream.ReadByte();
-
-                if (b == -1)
-                {
-                    // We've encountered the end of the file stream which means there's no EOI marker in the image
-                    // or the SOS marker has the wrong dimensions set.
-                    this.Eof = true;
-                    b = 0;
-                }
+                int b = this.ReadStream();
 
                 // Found a marker.
                 if (b == JpegConstants.Markers.XFF)
                 {
-                    this.MarkerPosition = this.stream.Position - 1;
-                    int c = this.stream.ReadByte();
+                    int c = this.ReadStream();
                     while (c == JpegConstants.Markers.XFF)
                     {
-                        c = this.stream.ReadByte();
-
-                        if (c == -1)
-                        {
-                            this.Eof = true;
-                            c = 0;
-                            break;
-                        }
+                        // Loop here to discard any padding FF's on terminating marker,
+                        // so that we can save a valid marker value.
+                        c = this.ReadStream();
                     }
 
+                    // We accept multiple FF's followed by a 0 as meaning a single FF data byte.
+                    // This data pattern is not valid according to the standard.
                     if (c != 0)
                     {
                         this.Marker = (byte)c;
-                        this.noMore = true;
+                        this.badData = true;
                         if (!this.HasRestart())
                         {
+                            this.MarkerPosition = this.stream.Position - 2;
                             this.BadMarker = true;
                         }
                     }
@@ -184,5 +173,21 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
             return temp;
         }
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        private int ReadStream()
+        {
+            int value = this.badData ? 0 : this.stream.ReadByte();
+            if (value == -1)
+            {
+                // We've encountered the end of the file stream which means there's no EOI marker
+                // in the image or the SOS marker has the wrong dimensions set.
+                this.badData = true;
+                this.NoData = true;
+                value = 0;
+            }
+
+            return value;
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
index 76fea92976..c28733250a 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -130,6 +130,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int mcu = 0;
             int mcusPerColumn = this.frame.McusPerColumn;
             int mcusPerLine = this.frame.McusPerLine;
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
 
             // Pre-derive the huffman table to avoid in-loop checks.
             for (int i = 0; i < this.componentsLength; i++)
@@ -171,6 +172,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                             for (int x = 0; x < h; x++)
                             {
+                                if (buffer.NoData)
+                                {
+                                    return;
+                                }
+
                                 int blockCol = (mcuCol * h) + x;
 
                                 this.DecodeBlockBaseline(
@@ -193,6 +199,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         private unsafe void ParseBaselineDataNonInterleaved()
         {
             JpegComponent component = this.components[this.frame.ComponentOrder[0]];
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
 
             int w = component.WidthInBlocks;
             int h = component.HeightInBlocks;
@@ -210,6 +217,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                 for (int i = 0; i < w; i++)
                 {
+                    if (buffer.NoData)
+                    {
+                        return;
+                    }
+
                     this.DecodeBlockBaseline(
                         component,
                         ref Unsafe.Add(ref blockRef, i),
@@ -294,6 +306,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             int mcu = 0;
             int mcusPerColumn = this.frame.McusPerColumn;
             int mcusPerLine = this.frame.McusPerLine;
+            ref HuffmanScanBuffer buffer = ref this.scanBuffer;
 
             // Pre-derive the huffman table to avoid in-loop checks.
             for (int k = 0; k < this.componentsLength; k++)
@@ -316,7 +329,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                         int order = this.frame.ComponentOrder[k];
                         JpegComponent component = this.components[order];
                         ref HuffmanTable dcHuffmanTable = ref this.dcHuffmanTables[component.DCHuffmanTableId];
-                        ref HuffmanScanBuffer buffer = ref this.scanBuffer;
 
                         int h = component.HorizontalSamplingFactor;
                         int v = component.VerticalSamplingFactor;
@@ -331,7 +343,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                             for (int x = 0; x < h; x++)
                             {
-                                if (buffer.Eof)
+                                if (buffer.NoData)
                                 {
                                     return;
                                 }
@@ -375,7 +387,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                     for (int i = 0; i < w; i++)
                     {
-                        if (buffer.Eof)
+                        if (buffer.NoData)
                         {
                             return;
                         }
@@ -404,7 +416,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
                     for (int i = 0; i < w; i++)
                     {
-                        if (buffer.Eof)
+                        if (buffer.NoData)
                         {
                             return;
                         }
@@ -691,4 +703,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             return false;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index d428000efe..56496fad1b 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -17,6 +17,10 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
 
                 // BUG: The following image has a high difference compared to the expected output:
                 // TestImages.Jpeg.Baseline.Jpeg420Small,
+
+                // BUG: While we can decode this image we do not return the same output as libjpeg
+                // based decoders and are inserting a number of lines equal to the corrupted lines
+                // below said lines.
                 // TestImages.Jpeg.Issues.Fuzz.AccessViolationException922,
 
                 TestImages.Jpeg.Baseline.Jpeg444,

From 4d3ae3badd8c6c912674067053f39cca66df2375 Mon Sep 17 00:00:00 2001
From: tonygameplan <50851017+tonygameplan@users.noreply.github.com>
Date: Tue, 4 Jun 2019 23:44:52 -0700
Subject: [PATCH 216/223] Fix missing "using PixelFormats" line in Readme
 example (#921)

* Fix missing PixelFormats line in first API example

"<Rgba32>" does not appear to be defined without the "using SixLabors.ImageSharp.PixelFormats;" line and causes a "The type or namespace name 'Rgba32' could not be found (are you missing a using directive or an assembly reference?) (CS0246)" error to occur.

* Remove stray newline
---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 515fc71969..a5c3457fac 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,7 @@ On platforms supporting netstandard 1.3+
 ```csharp
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.PixelFormats;
 
 // Image.Load(string path) is a shortcut for our default type. 
 // Other pixel formats use Image.Load<TPixel>(string path))

From 30a1b11f898d89722552bee14c2c7855ebcc78c5 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Mon, 10 Jun 2019 08:24:54 +0200
Subject: [PATCH 217/223] Feature: Bitmap RLE undefined pixel handling (#927)

* Add bitmap decoder option, how to treat skipped pixels for RLE

* Refactored bitmap tests into smaller tests, instead of just one test which goes through all bitmap files

* Add another adobe v3 header bitmap testcase

* Using the constant from BmpConstants to Identify bitmaps

* Bitmap decoder now can handle oversized palette's

* Add test for invalid palette size

* Renamed RleUndefinedPixelHandling to RleSkippedPixelHandling

* Explicitly using SystemDrawingReferenceDecoder in some BitmapDecoder tests

* Add test cases for unsupported bitmaps

* Comparing RLE test images to reference decoder only on windows

* Add test case for decoding winv4 fast path

* Add another 8 Bit RLE test with magick reference decoder

* Optimize RLE skipped pixel handling

* Refactor RLE decoding to eliminate code duplication

* Using MagickReferenceDecoder for the 8-Bit RLE test
---
 src/ImageSharp/Formats/Bmp/BmpDecoder.cs      |   7 +-
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 240 ++++++++++++++----
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs  |   9 +
 .../Formats/Bmp/BmpImageFormatDetector.cs     |   6 +-
 .../Formats/Bmp/IBmpDecoderOptions.cs         |   5 +-
 .../Formats/Bmp/RleSkippedPixelHandling.cs    |  26 ++
 tests/ImageSharp.Tests/FileTestBase.cs        |   2 +-
 .../Formats/Bmp/BmpDecoderTests.cs            | 226 ++++++++++++++++-
 .../JpegProfilingBenchmarks.cs                |   2 +-
 tests/ImageSharp.Tests/TestImages.cs          |  57 +++--
 tests/Images/Input/Bmp/invalidPaletteSize.bmp |   3 +
 tests/Images/Input/Bmp/pal4rlecut.bmp         |   3 +
 tests/Images/Input/Bmp/pal4rletrns.bmp        |   3 +
 tests/Images/Input/Bmp/pal8oversizepal.bmp    |   3 +
 tests/Images/Input/Bmp/pal8rlecut.bmp         |   3 +
 tests/Images/Input/Bmp/pal8rletrns.bmp        |   3 +
 tests/Images/Input/Bmp/rgb24jpeg.bmp          |   3 +
 tests/Images/Input/Bmp/rgb24largepal.bmp      |   3 +
 tests/Images/Input/Bmp/rgb24png.bmp           |   3 +
 tests/Images/Input/Bmp/rgb32h52.bmp           |   3 +
 tests/Images/Input/Bmp/rgba32v4.bmp           |   3 +
 tests/Images/Input/Bmp/rle4-delta-320x240.bmp |   3 +
 tests/Images/Input/Bmp/rle8-blank-160x120.bmp |   3 +
 tests/Images/Input/Bmp/rle8-delta-320x240.bmp |   3 +
 24 files changed, 537 insertions(+), 85 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Bmp/RleSkippedPixelHandling.cs
 create mode 100644 tests/Images/Input/Bmp/invalidPaletteSize.bmp
 create mode 100644 tests/Images/Input/Bmp/pal4rlecut.bmp
 create mode 100644 tests/Images/Input/Bmp/pal4rletrns.bmp
 create mode 100644 tests/Images/Input/Bmp/pal8oversizepal.bmp
 create mode 100644 tests/Images/Input/Bmp/pal8rlecut.bmp
 create mode 100644 tests/Images/Input/Bmp/pal8rletrns.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb24jpeg.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb24largepal.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb24png.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb32h52.bmp
 create mode 100644 tests/Images/Input/Bmp/rgba32v4.bmp
 create mode 100644 tests/Images/Input/Bmp/rle4-delta-320x240.bmp
 create mode 100644 tests/Images/Input/Bmp/rle8-blank-160x120.bmp
 create mode 100644 tests/Images/Input/Bmp/rle8-delta-320x240.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
index ebb7ffdf3c..a404ab418b 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoder.cs
@@ -14,13 +14,18 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// <list type="bullet">
     ///    <item>JPG</item>
     ///    <item>PNG</item>
-    ///    <item>RLE4</item>
+    ///    <item>Some OS/2 specific subtypes like: Bitmap Array, Color Icon, Color Pointer, Icon, Pointer.</item>
     /// </list>
     /// Formats will be supported in a later releases. We advise always
     /// to use only 24 Bit Windows bitmaps.
     /// </remarks>
     public sealed class BmpDecoder : IImageDecoder, IBmpDecoderOptions, IImageInfoDetector
     {
+        /// <summary>
+        /// Gets or sets a value indicating how to deal with skipped pixels, which can occur during decoding run length encoded bitmaps.
+        /// </summary>
+        public RleSkippedPixelHandling RleSkippedPixelHandling { get; set; } = RleSkippedPixelHandling.Black;
+
         /// <inheritdoc/>
         public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream)
             where TPixel : struct, IPixel<TPixel>
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 0cbc4fca1b..294b49ed7e 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -69,7 +69,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private ImageMetadata metadata;
 
         /// <summary>
-        /// The bmp specific metadata.
+        /// The bitmap specific metadata.
         /// </summary>
         private BmpMetadata bmpMetadata;
 
@@ -83,10 +83,21 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private BmpInfoHeader infoHeader;
 
+        /// <summary>
+        /// The global configuration.
+        /// </summary>
         private readonly Configuration configuration;
 
+        /// <summary>
+        /// Used for allocating memory during processing operations.
+        /// </summary>
         private readonly MemoryAllocator memoryAllocator;
 
+        /// <summary>
+        /// The bitmap decoder options.
+        /// </summary>
+        private readonly IBmpDecoderOptions options;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="BmpDecoderCore"/> class.
         /// </summary>
@@ -96,6 +107,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         {
             this.configuration = configuration;
             this.memoryAllocator = configuration.MemoryAllocator;
+            this.options = options;
         }
 
         /// <summary>
@@ -207,7 +219,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <param name="width">The image width.</param>
         /// <param name="componentCount">The pixel component count.</param>
         /// <returns>
-        /// The <see cref="int"/>.
+        /// The padding.
         /// </returns>
         private static int CalculatePadding(int width, int componentCount)
         {
@@ -222,7 +234,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Decodes a bitmap containing BITFIELDS Compression type. For each color channel, there will be bitmask
+        /// Decodes a bitmap containing the BITFIELDS Compression type. For each color channel, there will be a bitmask
         /// which will be used to determine which bits belong to that channel.
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
@@ -258,8 +270,8 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         /// <summary>
         /// Looks up color values and builds the image from de-compressed RLE8 or RLE4 data.
-        /// Compressed RLE8 stream is uncompressed by <see cref="UncompressRle8(int, Span{byte})"/>
-        /// Compressed RLE4 stream is uncompressed by <see cref="UncompressRle4(int, Span{byte})"/>
+        /// Compressed RLE8 stream is uncompressed by <see cref="UncompressRle8(int, Span{byte}, Span{bool}, Span{bool})"/>
+        /// Compressed RLE4 stream is uncompressed by <see cref="UncompressRle4(int, Span{byte}, Span{bool}, Span{bool})"/>
         /// </summary>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <param name="compression">The compression type. Either RLE4 or RLE8.</param>
@@ -273,14 +285,17 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         {
             TPixel color = default;
             using (Buffer2D<byte> buffer = this.memoryAllocator.Allocate2D<byte>(width, height, AllocationOptions.Clean))
+            using (Buffer2D<bool> undefinedPixels = this.memoryAllocator.Allocate2D<bool>(width, height, AllocationOptions.Clean))
+            using (IMemoryOwner<bool> rowsWithUndefinedPixels = this.memoryAllocator.Allocate<bool>(height, AllocationOptions.Clean))
             {
+                Span<bool> rowsWithUndefinedPixelsSpan = rowsWithUndefinedPixels.Memory.Span;
                 if (compression == BmpCompression.RLE8)
                 {
-                    this.UncompressRle8(width, buffer.GetSpan());
+                    this.UncompressRle8(width, buffer.GetSpan(), undefinedPixels.GetSpan(), rowsWithUndefinedPixelsSpan);
                 }
                 else
                 {
-                    this.UncompressRle4(width, buffer.GetSpan());
+                    this.UncompressRle4(width, buffer.GetSpan(), undefinedPixels.GetSpan(), rowsWithUndefinedPixelsSpan);
                 }
 
                 for (int y = 0; y < height; y++)
@@ -289,10 +304,46 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     Span<byte> bufferRow = buffer.GetRowSpan(y);
                     Span<TPixel> pixelRow = pixels.GetRowSpan(newY);
 
-                    for (int x = 0; x < width; x++)
+                    bool rowHasUndefinedPixels = rowsWithUndefinedPixelsSpan[y];
+                    if (rowHasUndefinedPixels)
                     {
-                        color.FromBgr24(Unsafe.As<byte, Bgr24>(ref colors[bufferRow[x] * 4]));
-                        pixelRow[x] = color;
+                        // Slow path with undefined pixels.
+                        for (int x = 0; x < width; x++)
+                        {
+                            byte colorIdx = bufferRow[x];
+                            if (undefinedPixels[x, y])
+                            {
+                                switch (this.options.RleSkippedPixelHandling)
+                                {
+                                    case RleSkippedPixelHandling.FirstColorOfPalette:
+                                        color.FromBgr24(Unsafe.As<byte, Bgr24>(ref colors[colorIdx * 4]));
+                                        break;
+                                    case RleSkippedPixelHandling.Transparent:
+                                        color.FromVector4(Vector4.Zero);
+                                        break;
+
+                                    // Default handling for skipped pixels is black (which is what System.Drawing is also doing).
+                                    default:
+                                        color.FromVector4(new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
+                                        break;
+                                }
+                            }
+                            else
+                            {
+                                color.FromBgr24(Unsafe.As<byte, Bgr24>(ref colors[colorIdx * 4]));
+                            }
+
+                            pixelRow[x] = color;
+                        }
+                    }
+                    else
+                    {
+                        // Fast path without any undefined pixels.
+                        for (int x = 0; x < width; x++)
+                        {
+                            color.FromBgr24(Unsafe.As<byte, Bgr24>(ref colors[bufferRow[x] * 4]));
+                            pixelRow[x] = color;
+                        }
                     }
                 }
             }
@@ -308,7 +359,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </remarks>
         /// <param name="w">The width of the bitmap.</param>
         /// <param name="buffer">Buffer for uncompressed data.</param>
-        private void UncompressRle4(int w, Span<byte> buffer)
+        /// <param name="undefinedPixels">Keeps track over skipped and therefore undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">Keeps track of rows, which have undefined pixels.</param>
+        private void UncompressRle4(int w, Span<byte> buffer, Span<bool> undefinedPixels, Span<bool> rowsWithUndefinedPixels)
         {
 #if NETCOREAPP2_1
             Span<byte> cmd = stackalloc byte[2];
@@ -329,21 +382,20 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     switch (cmd[1])
                     {
                         case RleEndOfBitmap:
+                            int skipEoB = buffer.Length - count;
+                            RleSkipEndOfBitmap(count, w, skipEoB, undefinedPixels, rowsWithUndefinedPixels);
+
                             return;
 
                         case RleEndOfLine:
-                            int extra = count % w;
-                            if (extra > 0)
-                            {
-                                count += w - extra;
-                            }
+                            count += RleSkipEndOfLine(count, w, undefinedPixels, rowsWithUndefinedPixels);
 
                             break;
 
                         case RleDelta:
                             int dx = this.stream.ReadByte();
                             int dy = this.stream.ReadByte();
-                            count += (w * dy) + dx;
+                            count += RleSkipDelta(count, w, dx, dy, undefinedPixels, rowsWithUndefinedPixels);
 
                             break;
 
@@ -374,7 +426,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                                 }
                             }
 
-                            // Absolute mode data is aligned to two-byte word-boundary
+                            // Absolute mode data is aligned to two-byte word-boundary.
                             int padding = bytesToRead & 1;
 
                             this.stream.Skip(padding);
@@ -418,7 +470,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </remarks>
         /// <param name="w">The width of the bitmap.</param>
         /// <param name="buffer">Buffer for uncompressed data.</param>
-        private void UncompressRle8(int w, Span<byte> buffer)
+        /// <param name="undefinedPixels">Keeps track of skipped and therefore undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">Keeps track of rows, which have undefined pixels.</param>
+        private void UncompressRle8(int w, Span<byte> buffer, Span<bool> undefinedPixels, Span<bool> rowsWithUndefinedPixels)
         {
 #if NETCOREAPP2_1
             Span<byte> cmd = stackalloc byte[2];
@@ -439,27 +493,26 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     switch (cmd[1])
                     {
                         case RleEndOfBitmap:
+                            int skipEoB = buffer.Length - count;
+                            RleSkipEndOfBitmap(count, w, skipEoB, undefinedPixels, rowsWithUndefinedPixels);
+
                             return;
 
                         case RleEndOfLine:
-                            int extra = count % w;
-                            if (extra > 0)
-                            {
-                                count += w - extra;
-                            }
+                            count += RleSkipEndOfLine(count, w, undefinedPixels, rowsWithUndefinedPixels);
 
                             break;
 
                         case RleDelta:
                             int dx = this.stream.ReadByte();
                             int dy = this.stream.ReadByte();
-                            count += (w * dy) + dx;
+                            count += RleSkipDelta(count, w, dx, dy, undefinedPixels, rowsWithUndefinedPixels);
 
                             break;
 
                         default:
-                            // If the second byte > 2, we are in 'absolute mode'
-                            // Take this number of bytes from the stream as uncompressed data
+                            // If the second byte > 2, we are in 'absolute mode'.
+                            // Take this number of bytes from the stream as uncompressed data.
                             int length = cmd[1];
 
                             byte[] run = new byte[length];
@@ -470,7 +523,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
                             count += run.Length;
 
-                            // Absolute mode data is aligned to two-byte word-boundary
+                            // Absolute mode data is aligned to two-byte word-boundary.
                             int padding = length & 1;
 
                             this.stream.Skip(padding);
@@ -481,16 +534,105 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 else
                 {
                     int max = count + cmd[0]; // as we start at the current count in the following loop, max is count + cmd[0]
-                    byte cmd1 = cmd[1]; // store the value to avoid the repeated indexer access inside the loop
+                    byte colorIdx = cmd[1]; // store the value to avoid the repeated indexer access inside the loop.
 
                     for (; count < max; count++)
                     {
-                        buffer[count] = cmd1;
+                        buffer[count] = colorIdx;
                     }
                 }
             }
         }
 
+        /// <summary>
+        /// Keeps track of skipped / undefined pixels, when EndOfBitmap command occurs.
+        /// </summary>
+        /// <param name="count">The already processed pixel count.</param>
+        /// <param name="w">The width of the image.</param>
+        /// <param name="skipPixelCount">The skipped pixel count.</param>
+        /// <param name="undefinedPixels">The undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">Rows with undefined pixels.</param>
+        private static void RleSkipEndOfBitmap(
+            int count,
+            int w,
+            int skipPixelCount,
+            Span<bool> undefinedPixels,
+            Span<bool> rowsWithUndefinedPixels)
+        {
+            for (int i = count; i < count + skipPixelCount; i++)
+            {
+                undefinedPixels[i] = true;
+            }
+
+            int skippedRowIdx = count / w;
+            int skippedRows = (skipPixelCount / w) - 1;
+            int lastSkippedRow = Math.Min(skippedRowIdx + skippedRows, rowsWithUndefinedPixels.Length - 1);
+            for (int i = skippedRowIdx; i <= lastSkippedRow; i++)
+            {
+                rowsWithUndefinedPixels[i] = true;
+            }
+        }
+
+        /// <summary>
+        /// Keeps track of undefined / skipped pixels, when the EndOfLine command occurs.
+        /// </summary>
+        /// <param name="count">The already processed pixel count.</param>
+        /// <param name="w">The width of image.</param>
+        /// <param name="undefinedPixels">The undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">The rows with undefined pixels.</param>
+        /// <returns>The number of skipped pixels.</returns>
+        private static int RleSkipEndOfLine(int count, int w, Span<bool> undefinedPixels, Span<bool> rowsWithUndefinedPixels)
+        {
+            rowsWithUndefinedPixels[count / w] = true;
+            int remainingPixelsInRow = count % w;
+            if (remainingPixelsInRow > 0)
+            {
+                int skipEoL = w - remainingPixelsInRow;
+                for (int i = count; i < count + skipEoL; i++)
+                {
+                    undefinedPixels[i] = true;
+                }
+
+                return skipEoL;
+            }
+
+            return 0;
+        }
+
+        /// <summary>
+        /// Keeps track of undefined / skipped pixels, when the delta command occurs.
+        /// </summary>
+        /// <param name="count">The count.</param>
+        /// <param name="w">The width of the image.</param>
+        /// <param name="dx">Delta skip in x direction.</param>
+        /// <param name="dy">Delta skip in y direction.</param>
+        /// <param name="undefinedPixels">The undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">The rows with undefined pixels.</param>
+        /// <returns>The number of skipped pixels.</returns>
+        private static int RleSkipDelta(
+            int count,
+            int w,
+            int dx,
+            int dy,
+            Span<bool> undefinedPixels,
+            Span<bool> rowsWithUndefinedPixels)
+        {
+            int skipDelta = (w * dy) + dx;
+            for (int i = count; i < count + skipDelta; i++)
+            {
+                undefinedPixels[i] = true;
+            }
+
+            int skippedRowIdx = count / w;
+            int lastSkippedRow = Math.Min(skippedRowIdx + dy, rowsWithUndefinedPixels.Length - 1);
+            for (int i = skippedRowIdx; i <= lastSkippedRow; i++)
+            {
+                rowsWithUndefinedPixels[i] = true;
+            }
+
+            return skipDelta;
+        }
+
         /// <summary>
         /// Reads the color palette from the stream.
         /// </summary>
@@ -506,7 +648,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private void ReadRgbPalette<TPixel>(Buffer2D<TPixel> pixels, byte[] colors, int width, int height, int bitsPerPixel, int bytesPerColorMapEntry, bool inverted)
             where TPixel : struct, IPixel<TPixel>
         {
-            // Pixels per byte (bits per pixel)
+            // Pixels per byte (bits per pixel).
             int ppb = 8 / bitsPerPixel;
 
             int arrayWidth = (width + ppb - 1) / ppb;
@@ -514,7 +656,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             // Bit mask
             int mask = 0xFF >> (8 - bitsPerPixel);
 
-            // Rows are aligned on 4 byte boundaries
+            // Rows are aligned on 4 byte boundaries.
             int padding = arrayWidth % 4;
             if (padding != 0)
             {
@@ -810,11 +952,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             uint maxValueAlpha = 0xFFFFFFFF >> (32 - bitsAlphaMask);
             float invMaxValueAlpha = 1.0f / maxValueAlpha;
 
-            bool unusualBitMask = false;
-            if (bitsRedMask > 8 || bitsGreenMask > 8 || bitsBlueMask > 8 || invMaxValueAlpha > 8)
-            {
-                unusualBitMask = true;
-            }
+            bool unusualBitMask = bitsRedMask > 8 || bitsGreenMask > 8 || bitsBlueMask > 8 || invMaxValueAlpha > 8;
 
             using (IManagedByteBuffer buffer = this.memoryAllocator.AllocateManagedByteBuffer(stride))
             {
@@ -910,7 +1048,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 #else
             byte[] buffer = new byte[BmpInfoHeader.MaxHeaderSize];
 #endif
-            this.stream.Read(buffer, 0, BmpInfoHeader.HeaderSizeSize); // read the header size
+
+            // Read the header size.
+            this.stream.Read(buffer, 0, BmpInfoHeader.HeaderSizeSize);
 
             int headerSize = BinaryPrimitives.ReadInt32LittleEndian(buffer);
             if (headerSize < BmpInfoHeader.CoreSize)
@@ -925,7 +1065,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 headerSize = BmpInfoHeader.MaxHeaderSize;
             }
 
-            // read the rest of the header
+            // Read the rest of the header.
             this.stream.Read(buffer, BmpInfoHeader.HeaderSizeSize, headerSize - BmpInfoHeader.HeaderSizeSize);
 
             BmpInfoHeaderType infoHeaderType = BmpInfoHeaderType.WinVersion2;
@@ -953,7 +1093,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 {
                     byte[] bitfieldsBuffer = new byte[12];
                     this.stream.Read(bitfieldsBuffer, 0, 12);
-                    Span<byte> data = bitfieldsBuffer.AsSpan<byte>();
+                    Span<byte> data = bitfieldsBuffer.AsSpan();
                     this.infoHeader.RedMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4));
                     this.infoHeader.GreenMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4));
                     this.infoHeader.BlueMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4));
@@ -962,7 +1102,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 {
                     byte[] bitfieldsBuffer = new byte[16];
                     this.stream.Read(bitfieldsBuffer, 0, 16);
-                    Span<byte> data = bitfieldsBuffer.AsSpan<byte>();
+                    Span<byte> data = bitfieldsBuffer.AsSpan();
                     this.infoHeader.RedMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(0, 4));
                     this.infoHeader.GreenMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(4, 4));
                     this.infoHeader.BlueMask = BinaryPrimitives.ReadInt32LittleEndian(data.Slice(8, 4));
@@ -1021,7 +1161,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.bmpMetadata = this.metadata.GetFormatMetadata(BmpFormat.Instance);
             this.bmpMetadata.InfoHeaderType = infoHeaderType;
 
-            // We can only encode at these bit rates so far.
+            // We can only encode at these bit rates so far (1 bit and 4 bit are still missing).
             if (bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel8)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel16)
                 || bitsPerPixel.Equals((short)BmpBitsPerPixel.Pixel24)
@@ -1030,7 +1170,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 this.bmpMetadata.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
             }
 
-            // skip the remaining header because we can't read those parts
+            // Skip the remaining header because we can't read those parts.
             this.stream.Skip(skipAmount);
         }
 
@@ -1105,10 +1245,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
             if (colorMapSize > 0)
             {
-                // 256 * 4
-                if (colorMapSize > 1024)
+                // Usually the color palette is 1024 byte (256 colors * 4), but the documentation does not mention a size limit.
+                // Make sure, that we will not read pass the bitmap offset (starting position of image data).
+                if ((this.stream.Position + colorMapSize) > this.fileHeader.Offset)
                 {
-                    BmpThrowHelper.ThrowImageFormatException($"Invalid bmp colormap size '{colorMapSize}'");
+                    BmpThrowHelper.ThrowImageFormatException(
+                        $"Reading the color map would read beyond the bitmap offset. Either the color map size of '{colorMapSize}' is invalid or the bitmap offset.");
                 }
 
                 palette = new byte[colorMapSize];
@@ -1121,7 +1263,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             int skipAmount = this.fileHeader.Offset - (int)this.stream.Position;
             if ((skipAmount + (int)this.stream.Position) > this.stream.Length)
             {
-                BmpThrowHelper.ThrowImageFormatException($"Invalid fileheader offset found. Offset is greater than the stream length.");
+                BmpThrowHelper.ThrowImageFormatException("Invalid fileheader offset found. Offset is greater than the stream length.");
             }
 
             if (skipAmount > 0)
@@ -1132,4 +1274,4 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             return bytesPerColorMapEntry;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index 9fbd0b5adb..4e6ec45021 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -51,10 +51,19 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private const int ColorPaletteSize8Bit = 1024;
 
+        /// <summary>
+        /// Used for allocating memory during processing operations.
+        /// </summary>
         private readonly MemoryAllocator memoryAllocator;
 
+        /// <summary>
+        /// The global configuration.
+        /// </summary>
         private Configuration configuration;
 
+        /// <summary>
+        /// The color depth, in number of bits per pixel.
+        /// </summary>
         private BmpBitsPerPixel? bitsPerPixel;
 
         /// <summary>
diff --git a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
index c0814b1dfc..4f862d9295 100644
--- a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Buffers.Binary;
 
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
@@ -21,10 +22,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         private bool IsSupportedFileFormat(ReadOnlySpan<byte> header)
         {
-            // TODO: This should be in constants
-            return header.Length >= this.HeaderSize
-                && header[0] == 0x42 // B
-                && header[1] == 0x4D; // M
+            return header.Length >= this.HeaderSize && BinaryPrimitives.ReadInt16LittleEndian(header) == BmpConstants.TypeMarkers.Bitmap;
         }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/IBmpDecoderOptions.cs b/src/ImageSharp/Formats/Bmp/IBmpDecoderOptions.cs
index 219d37ca62..f456f2ba3a 100644
--- a/src/ImageSharp/Formats/Bmp/IBmpDecoderOptions.cs
+++ b/src/ImageSharp/Formats/Bmp/IBmpDecoderOptions.cs
@@ -8,6 +8,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     /// </summary>
     internal interface IBmpDecoderOptions
     {
-        // added this for consistency so we can add stuff as required, no options currently available
+        /// <summary>
+        /// Gets the value indicating how to deal with skipped pixels, which can occur during decoding run length encoded bitmaps.
+        /// </summary>
+        RleSkippedPixelHandling RleSkippedPixelHandling { get; }
     }
 }
\ No newline at end of file
diff --git a/src/ImageSharp/Formats/Bmp/RleSkippedPixelHandling.cs b/src/ImageSharp/Formats/Bmp/RleSkippedPixelHandling.cs
new file mode 100644
index 0000000000..493fe366ad
--- /dev/null
+++ b/src/ImageSharp/Formats/Bmp/RleSkippedPixelHandling.cs
@@ -0,0 +1,26 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Formats.Bmp
+{
+    /// <summary>
+    /// Defines possible options, how skipped pixels during decoding of run length encoded bitmaps should be treated.
+    /// </summary>
+    public enum RleSkippedPixelHandling : int
+    {
+        /// <summary>
+        /// Undefined pixels should be black. This is the default behavior and equal to how System.Drawing handles undefined pixels.
+        /// </summary>
+        Black = 0,
+
+        /// <summary>
+        /// Undefined pixels should be transparent.
+        /// </summary>
+        Transparent = 1,
+
+        /// <summary>
+        /// Undefined pixels should have the first color of the palette.
+        /// </summary>
+        FirstColorOfPalette = 2
+    }
+}
diff --git a/tests/ImageSharp.Tests/FileTestBase.cs b/tests/ImageSharp.Tests/FileTestBase.cs
index a056bc474e..4f8475738b 100644
--- a/tests/ImageSharp.Tests/FileTestBase.cs
+++ b/tests/ImageSharp.Tests/FileTestBase.cs
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.Tests
         /// <summary>
         /// A collection of all the bmp test images
         /// </summary>
-        public static IEnumerable<string> AllBmpFiles = TestImages.Bmp.All;
+        public static IEnumerable<string> AllBmpFiles = TestImages.Bmp.Benchmark;
 
         /// <summary>
         /// A collection of all the jpeg test images
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index e615dbe568..c4dfa724cc 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -1,6 +1,7 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.IO;
 using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.PixelFormats;
@@ -20,27 +21,26 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
     {
         public const PixelTypes CommonNonDefaultPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;
 
-        public static readonly string[] AllBmpFiles = All;
+        public static readonly string[] MiscBmpFiles = Miscellaneous;
 
         public static readonly string[] BitfieldsBmpFiles = BitFields;
 
         public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
         new TheoryData<string, int, int, PixelResolutionUnit>
         {
-            { TestImages.Bmp.Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
-            { TestImages.Bmp.RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
+            { Car, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
+            { V5Header, 3780, 3780 , PixelResolutionUnit.PixelsPerMeter },
+            { RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
         };
 
         [Theory]
-        [WithFileCollection(nameof(AllBmpFiles), PixelTypes.Rgba32)]
-        public void DecodeBmp<TPixel>(TestImageProvider<TPixel> provider)
+        [WithFileCollection(nameof(MiscBmpFiles), PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_MiscellaneousBitmaps<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
             {
                 image.DebugSave(provider);
-
                 if (TestEnvironment.IsWindows)
                 {
                     image.CompareToOriginal(provider);
@@ -60,6 +60,174 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             }
         }
 
+        [Theory]
+        [WithFile(Bit16Inverted, PixelTypes.Rgba32)]
+        [WithFile(Bit8Inverted, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_Inverted<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit1, PixelTypes.Rgba32)]
+        [WithFile(Bit1Pal1, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_1Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new SystemDrawingReferenceDecoder());
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit4, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_4Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                // The Magick Reference Decoder can not decode 4-Bit bitmaps, so only execute this on windows.
+                if (TestEnvironment.IsWindows)
+                {
+                    image.CompareToOriginal(provider);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit8, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_8Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit16, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_16Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_32Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(Rgba32v4, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_32BitV4Header_Fast<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
+        [Theory]
+        [WithFile(RLE4Cut, PixelTypes.Rgba32)]
+        [WithFile(RLE4Delta, PixelTypes.Rgba32)]
+        [WithFile(Rle4Delta320240, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_4Bit_WithDelta<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black }))
+            {
+                image.DebugSave(provider);
+                // The Magick Reference Decoder can not decode 4-Bit bitmaps, so only execute this on windows.
+                if (TestEnvironment.IsWindows)
+                {
+                    image.CompareToOriginal(provider);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(RLE4, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_4Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black }))
+            {
+                image.DebugSave(provider);
+                // The Magick Reference Decoder can not decode 4-Bit bitmaps, so only execute this on windows.
+                if (TestEnvironment.IsWindows)
+                {
+                    image.CompareToOriginal(provider);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(RLE8Cut, PixelTypes.Rgba32)]
+        [WithFile(RLE8Delta, PixelTypes.Rgba32)]
+        [WithFile(Rle8Delta320240, PixelTypes.Rgba32)]
+        [WithFile(Rle8Blank160120, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit_WithDelta_SystemDrawingRefDecoder<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black }))
+            {
+                image.DebugSave(provider);
+                if (TestEnvironment.IsWindows)
+                {
+                    image.CompareToOriginal(provider, new SystemDrawingReferenceDecoder());
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(RLE8Cut, PixelTypes.Rgba32)]
+        [WithFile(RLE8Delta, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit_WithDelta_MagickRefDecoder<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.FirstColorOfPalette }))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
+        [Theory]
+        [WithFile(RLE8, PixelTypes.Rgba32)]
+        [WithFile(RLE8Inverted, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.FirstColorOfPalette }))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
         [Theory]
         [WithFile(RgbaAlphaBitfields, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeAlphaBitfields<TPixel>(TestImageProvider<TPixel> provider)
@@ -106,6 +274,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 
         [Theory]
         [WithFile(WinBmpv2, PixelTypes.Rgba32)]
+        [WithFile(CoreHeader, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeBmpv2<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -141,7 +310,41 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         }
 
         [Theory]
-        [WithFile(Rgba32bf56, PixelTypes.Rgba32)]
+        [WithFile(OversizedPalette, PixelTypes.Rgba32)]
+        [WithFile(Rgb24LargePalette, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeOversizedPalette<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                if (TestEnvironment.IsWindows)
+                {
+                    image.CompareToOriginal(provider);
+                }
+            }
+        }
+
+        [Theory]
+        [WithFile(InvalidPaletteSize, PixelTypes.Rgba32)]
+        public void BmpDecoder_ThrowsImageFormatException_OnInvalidPaletteSize<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Assert.Throws<ImageFormatException>( () => { using (Image<TPixel> image = provider.GetImage(new BmpDecoder())) { } });
+        }
+
+        [Theory]
+        [WithFile(Rgb24jpeg, PixelTypes.Rgba32)]
+        [WithFile(Rgb24png, PixelTypes.Rgba32)]
+        public void BmpDecoder_ThrowsNotSupportedException_OnUnsupportedBitmaps<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            Assert.Throws<NotSupportedException>(() => { using (Image<TPixel> image = provider.GetImage(new BmpDecoder())) { } });
+        }
+
+        [Theory]
+        [WithFile(Rgba32bf56AdobeV3, PixelTypes.Rgba32)]
+        [WithFile(Rgb32h52AdobeV3, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeAdobeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -166,6 +369,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 
         [Theory]
         [WithFile(WinBmpv5, PixelTypes.Rgba32)]
+        [WithFile(V5Header, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeBmpv5<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
@@ -223,6 +427,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [InlineData(Bit8, 8)]
         [InlineData(Bit8Inverted, 8)]
         [InlineData(Bit4, 4)]
+        [InlineData(Bit1, 1)]
+        [InlineData(Bit1Pal1, 1)]
         public void Identify(string imagePath, int expectedPixelSize)
         {
             var testFile = TestFile.Create(imagePath);
@@ -281,4 +487,4 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/ProfilingBenchmarks/JpegProfilingBenchmarks.cs b/tests/ImageSharp.Tests/ProfilingBenchmarks/JpegProfilingBenchmarks.cs
index 65989556d2..95a47fd7cc 100644
--- a/tests/ImageSharp.Tests/ProfilingBenchmarks/JpegProfilingBenchmarks.cs
+++ b/tests/ImageSharp.Tests/ProfilingBenchmarks/JpegProfilingBenchmarks.cs
@@ -82,7 +82,7 @@ namespace SixLabors.ImageSharp.Tests.ProfilingBenchmarks
                 return;
             }
 
-            string[] testFiles = TestImages.Bmp.All
+            string[] testFiles = TestImages.Bmp.Benchmark
                 .Concat(new[] { TestImages.Jpeg.Baseline.Calliphora, TestImages.Jpeg.Baseline.Cmyk }).ToArray();
 
             Image<Rgba32>[] testImages = testFiles.Select(
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index d8e8719ba1..d041f48544 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -231,8 +231,15 @@ namespace SixLabors.ImageSharp.Tests
             public const string CoreHeader = "Bmp/BitmapCoreHeaderQR.bmp";
             public const string V5Header = "Bmp/BITMAPV5HEADER.bmp";
             public const string RLE8 = "Bmp/RunLengthEncoded.bmp";
+            public const string RLE8Cut = "Bmp/pal8rlecut.bmp";
+            public const string RLE8Delta = "Bmp/pal8rletrns.bmp";
+            public const string Rle8Delta320240 = "Bmp/rle8-delta-320x240.bmp";
+            public const string Rle8Blank160120 = "Bmp/rle8-blank-160x120.bmp";
+            public const string RLE8Inverted = "Bmp/RunLengthEncoded-inverted.bmp";
             public const string RLE4 = "Bmp/pal4rle.bmp";
-            public const string RLEInverted = "Bmp/RunLengthEncoded-inverted.bmp";
+            public const string RLE4Cut = "Bmp/pal4rlecut.bmp";
+            public const string RLE4Delta = "Bmp/pal4rletrns.bmp";
+            public const string Rle4Delta320240 = "Bmp/rle4-delta-320x240.bmp";
             public const string Bit1 = "Bmp/pal1.bmp";
             public const string Bit1Pal1 = "Bmp/pal1p1.bmp";
             public const string Bit4 = "Bmp/pal4.bmp";
@@ -256,15 +263,22 @@ namespace SixLabors.ImageSharp.Tests
             public const string Os2v2 = "Bmp/pal8os2v2.bmp";
             public const string LessThanFullSizedPalette = "Bmp/pal8os2sp.bmp";
             public const string Pal8Offset = "Bmp/pal8offs.bmp";
+            public const string OversizedPalette = "Bmp/pal8oversizepal.bmp";
+            public const string Rgb24LargePalette = "Bmp/rgb24largepal.bmp";
+            public const string InvalidPaletteSize = "Bmp/invalidPaletteSize.bmp";
+            public const string Rgb24jpeg = "Bmp/rgb24jpeg.bmp";
+            public const string Rgb24png = "Bmp/rgb24png.bmp";
+            public const string Rgba32v4 = "Bmp/rgba32v4.bmp";
 
-            // Bitmap images with compression type BITFIELDS
+            // Bitmap images with compression type BITFIELDS.
             public const string Rgb32bfdef = "Bmp/rgb32bfdef.bmp";
             public const string Rgb32bf = "Bmp/rgb32bf.bmp";
             public const string Rgb16bfdef = "Bmp/rgb16bfdef.bmp";
             public const string Rgb16565 = "Bmp/rgb16-565.bmp";
             public const string Rgb16565pal = "Bmp/rgb16-565pal.bmp";
             public const string Issue735 = "Bmp/issue735.bmp";
-            public const string Rgba32bf56 = "Bmp/rgba32h56.bmp";
+            public const string Rgba32bf56AdobeV3 = "Bmp/rgba32h56.bmp";
+            public const string Rgb32h52AdobeV3 = "Bmp/rgb32h52.bmp";
             public const string Rgba321010102 = "Bmp/rgba32-1010102.bmp";
             public const string RgbaAlphaBitfields = "Bmp/rgba32abf.bmp";
 
@@ -278,25 +292,32 @@ namespace SixLabors.ImageSharp.Tests
                   Issue735,
             };
 
-            public static readonly string[] All
+            public static readonly string[] Miscellaneous
             = {
                 Car,
                 F,
-                NegHeight,
-                CoreHeader,
-                V5Header,
-                RLE4,
-                RLE8,
-                RLEInverted,
-                Bit1,
-                Bit1Pal1,
-                Bit4,
-                Bit8,
-                Bit8Inverted,
-                Bit16,
-                Bit16Inverted,
-                Bit32Rgb
+                NegHeight
             };
+
+            public static readonly string[] Benchmark
+                = {
+                          Car,
+                          F,
+                          NegHeight,
+                          CoreHeader,
+                          V5Header,
+                          RLE4,
+                          RLE8,
+                          RLE8Inverted,
+                          Bit1,
+                          Bit1Pal1,
+                          Bit4,
+                          Bit8,
+                          Bit8Inverted,
+                          Bit16,
+                          Bit16Inverted,
+                          Bit32Rgb
+                      };
         }
 
         public static class Gif
diff --git a/tests/Images/Input/Bmp/invalidPaletteSize.bmp b/tests/Images/Input/Bmp/invalidPaletteSize.bmp
new file mode 100644
index 0000000000..8a4b231166
--- /dev/null
+++ b/tests/Images/Input/Bmp/invalidPaletteSize.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eaea78be2e8e5579e2469400b8d811b125be805459888c3bd390570d21ffeab8
+size 9270
diff --git a/tests/Images/Input/Bmp/pal4rlecut.bmp b/tests/Images/Input/Bmp/pal4rlecut.bmp
new file mode 100644
index 0000000000..f67004039b
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal4rlecut.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e3dcbe1f39144845f339a88c9cbf34adc3e0b355440dbcb13e987aec77bb2137
+size 3610
diff --git a/tests/Images/Input/Bmp/pal4rletrns.bmp b/tests/Images/Input/Bmp/pal4rletrns.bmp
new file mode 100644
index 0000000000..674abdaff8
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal4rletrns.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2fcbaa0f387c57ba678ced91dfb2db5b2e544e2ed28a7875459e551b514daf84
+size 4326
diff --git a/tests/Images/Input/Bmp/pal8oversizepal.bmp b/tests/Images/Input/Bmp/pal8oversizepal.bmp
new file mode 100644
index 0000000000..e80319df9a
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8oversizepal.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:51c89919fc6b85cc11850054ff16bb947c11dead620e35a92e46d7b0fde79faf
+size 9446
diff --git a/tests/Images/Input/Bmp/pal8rlecut.bmp b/tests/Images/Input/Bmp/pal8rlecut.bmp
new file mode 100644
index 0000000000..b3e46321cc
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8rlecut.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:726c092da72e5412d2e1a0e3d9e35ee3630869e368fd4534c631f53bb5608a11
+size 7980
diff --git a/tests/Images/Input/Bmp/pal8rletrns.bmp b/tests/Images/Input/Bmp/pal8rletrns.bmp
new file mode 100644
index 0000000000..22f5629186
--- /dev/null
+++ b/tests/Images/Input/Bmp/pal8rletrns.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:445b856331c5d03054887d6555f56a8882f0aabbe0d59e322d9ff0be7f0eee94
+size 9212
diff --git a/tests/Images/Input/Bmp/rgb24jpeg.bmp b/tests/Images/Input/Bmp/rgb24jpeg.bmp
new file mode 100644
index 0000000000..6f5ae3b56c
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb24jpeg.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c09aad5b4717408e42d7cdd3d51d884d20be6a69adf73c7afcc47201df051f30
+size 2457
diff --git a/tests/Images/Input/Bmp/rgb24largepal.bmp b/tests/Images/Input/Bmp/rgb24largepal.bmp
new file mode 100644
index 0000000000..ac46d03da8
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb24largepal.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:62976c8077dddd97b7de7396d70d6aaded717c387a5272f3f6e18bb4abcd5f45
+size 25830
diff --git a/tests/Images/Input/Bmp/rgb24png.bmp b/tests/Images/Input/Bmp/rgb24png.bmp
new file mode 100644
index 0000000000..40969196e7
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb24png.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:07dcf8ac7fceee50ba5c3d89ece956e14b9bb4ea05f0a2b75f6958150d3d7a03
+size 1210
diff --git a/tests/Images/Input/Bmp/rgb32h52.bmp b/tests/Images/Input/Bmp/rgb32h52.bmp
new file mode 100644
index 0000000000..114c03fbd7
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb32h52.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9baf23d23b75ad2a641decce0e5b59640b3359ff327eecfa1b888595a6b502d6
+size 32578
diff --git a/tests/Images/Input/Bmp/rgba32v4.bmp b/tests/Images/Input/Bmp/rgba32v4.bmp
new file mode 100644
index 0000000000..6f9bf07bf8
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgba32v4.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c932d7241122b221ab8f35c427082643ea0241493276c5aef0e64a49b8b55b6c
+size 32634
diff --git a/tests/Images/Input/Bmp/rle4-delta-320x240.bmp b/tests/Images/Input/Bmp/rle4-delta-320x240.bmp
new file mode 100644
index 0000000000..a52aad3d89
--- /dev/null
+++ b/tests/Images/Input/Bmp/rle4-delta-320x240.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:514d8bafa663017276ce0a91eb90025bd5e0296984c50f0da2f477cd27ff6d68
+size 3686
diff --git a/tests/Images/Input/Bmp/rle8-blank-160x120.bmp b/tests/Images/Input/Bmp/rle8-blank-160x120.bmp
new file mode 100644
index 0000000000..d1d4496073
--- /dev/null
+++ b/tests/Images/Input/Bmp/rle8-blank-160x120.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ffb99a2ee179388c1e379492fee83e67d600fbf740fbcfb0a4cf8e4d42a662b3
+size 1080
diff --git a/tests/Images/Input/Bmp/rle8-delta-320x240.bmp b/tests/Images/Input/Bmp/rle8-delta-320x240.bmp
new file mode 100644
index 0000000000..ff8ee7a303
--- /dev/null
+++ b/tests/Images/Input/Bmp/rle8-delta-320x240.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:522a154731ea38e4ee29b4f27672b7d881bcfb1f0954fae126e79a27a63d5f06
+size 4646

From 34666d724b318a61a0e5e02c0a9198a7462e90ea Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 14 Jun 2019 12:23:43 +1000
Subject: [PATCH 218/223] Fix 925 (#929)

* Prevent overflow

* Cleanup huffman table

* Search for RST markers.

* Fix Benchmarks project
---
 .../Components/Decoder/HuffmanScanBuffer.cs   | 92 +++++++++++++------
 .../Components/Decoder/HuffmanScanDecoder.cs  | 14 ++-
 .../Jpeg/Components/Decoder/HuffmanTable.cs   | 48 +++++-----
 .../Formats/Jpeg/JpegDecoderCore.cs           |  6 +-
 .../ImageSharp.Benchmarks.csproj              | 11 +--
 .../Formats/Jpg/JpegDecoderTests.Images.cs    |  8 +-
 tests/Images/External                         |  2 +-
 7 files changed, 103 insertions(+), 78 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
index dd5160414e..13c89c82cf 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanBuffer.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         private ulong data;
 
         // The number of valid bits left to read in the buffer.
-        private int remain;
+        private int remainingBits;
 
         // Whether there is no more good data to pull from the stream for the current mcu.
         private bool badData;
@@ -26,10 +26,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         {
             this.stream = stream;
             this.data = 0ul;
-            this.remain = 0;
+            this.remainingBits = 0;
             this.Marker = JpegConstants.Markers.XFF;
             this.MarkerPosition = 0;
-            this.BadMarker = false;
             this.badData = false;
             this.NoData = false;
         }
@@ -44,11 +43,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// </summary>
         public long MarkerPosition { get; private set; }
 
-        /// <summary>
-        /// Gets a value indicating whether a bad marker has been detected, I.E. One that is not between RST0 and RST7
-        /// </summary>
-        public bool BadMarker { get; private set; }
-
         /// <summary>
         /// Gets a value indicating whether to continue reading the input stream.
         /// </summary>
@@ -57,7 +51,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         [MethodImpl(InliningOptions.ShortMethod)]
         public void CheckBits()
         {
-            if (this.remain < 16)
+            if (this.remainingBits < 16)
             {
                 this.FillBuffer();
             }
@@ -67,27 +61,31 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         public void Reset()
         {
             this.data = 0ul;
-            this.remain = 0;
+            this.remainingBits = 0;
             this.Marker = JpegConstants.Markers.XFF;
             this.MarkerPosition = 0;
-            this.BadMarker = false;
             this.badData = false;
             this.NoData = false;
         }
 
+        /// <summary>
+        /// Whether a RST marker has been detected, I.E. One that is between RST0 and RST7
+        /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public bool HasRestart()
-        {
-            byte m = this.Marker;
-            return m >= JpegConstants.Markers.RST0 && m <= JpegConstants.Markers.RST7;
-        }
+        public bool HasRestartMarker() => HasRestart(this.Marker);
+
+        /// <summary>
+        /// Whether a bad marker has been detected, I.E. One that is not between RST0 and RST7
+        /// </summary>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public bool HasBadMarker() => this.Marker != JpegConstants.Markers.XFF && !this.HasRestartMarker();
 
         [MethodImpl(InliningOptions.ShortMethod)]
         public void FillBuffer()
         {
             // Attempt to load at least the minimum number of required bits into the buffer.
             // We fail to do so only if we hit a marker or reach the end of the input stream.
-            this.remain += 48;
+            this.remainingBits += 48;
             this.data = (this.data << 48) | this.GetBytes();
         }
 
@@ -101,17 +99,17 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 
             if (size == JpegConstants.Huffman.SlowBits)
             {
-                ulong x = this.data << (JpegConstants.Huffman.RegisterSize - this.remain);
+                ulong x = this.data << (JpegConstants.Huffman.RegisterSize - this.remainingBits);
                 while (x > h.MaxCode[size])
                 {
                     size++;
                 }
 
                 v = (int)(x >> (JpegConstants.Huffman.RegisterSize - size));
-                symbol = h.Values[h.ValOffset[size] + v];
+                symbol = h.Values[(h.ValOffset[size] + v) & 0xFF];
             }
 
-            this.remain -= size;
+            this.remainingBits -= size;
 
             return symbol;
         }
@@ -124,10 +122,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         }
 
         [MethodImpl(InliningOptions.ShortMethod)]
-        public int GetBits(int nbits) => (int)ExtractBits(this.data, this.remain -= nbits, nbits);
+        private static bool HasRestart(byte marker)
+            => marker >= JpegConstants.Markers.RST0 && marker <= JpegConstants.Markers.RST7;
 
         [MethodImpl(InliningOptions.ShortMethod)]
-        public int PeekBits(int nbits) => (int)ExtractBits(this.data, this.remain - nbits, nbits);
+        public int GetBits(int nbits) => (int)ExtractBits(this.data, this.remainingBits -= nbits, nbits);
+
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public int PeekBits(int nbits) => (int)ExtractBits(this.data, this.remainingBits - nbits, nbits);
 
         [MethodImpl(InliningOptions.ShortMethod)]
         private static ulong ExtractBits(ulong value, int offset, int size) => (value >> offset) & (ulong)((1 << size) - 1);
@@ -149,22 +151,18 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                     int c = this.ReadStream();
                     while (c == JpegConstants.Markers.XFF)
                     {
-                        // Loop here to discard any padding FF's on terminating marker,
+                        // Loop here to discard any padding FF bytes on terminating marker,
                         // so that we can save a valid marker value.
                         c = this.ReadStream();
                     }
 
-                    // We accept multiple FF's followed by a 0 as meaning a single FF data byte.
+                    // We accept multiple FF bytes followed by a 0 as meaning a single FF data byte.
                     // This data pattern is not valid according to the standard.
                     if (c != 0)
                     {
                         this.Marker = (byte)c;
                         this.badData = true;
-                        if (!this.HasRestart())
-                        {
-                            this.MarkerPosition = this.stream.Position - 2;
-                            this.BadMarker = true;
-                        }
+                        this.MarkerPosition = this.stream.Position - 2;
                     }
                 }
 
@@ -174,6 +172,42 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             return temp;
         }
 
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public bool FindNextMarker()
+        {
+            while (true)
+            {
+                int b = this.stream.ReadByte();
+                if (b == -1)
+                {
+                    return false;
+                }
+
+                // Found a marker.
+                if (b == JpegConstants.Markers.XFF)
+                {
+                    while (b == JpegConstants.Markers.XFF)
+                    {
+                        // Loop here to discard any padding FF bytes on terminating marker.
+                        b = this.stream.ReadByte();
+                        if (b == -1)
+                        {
+                            return false;
+                        }
+                    }
+
+                    // Found a valid marker. Exit loop
+                    if (b != 0)
+                    {
+                        this.Marker = (byte)b;
+                        this.badData = true;
+                        this.MarkerPosition = this.stream.Position - 2;
+                        return true;
+                    }
+                }
+            }
+        }
+
         [MethodImpl(InliningOptions.ShortMethod)]
         private int ReadStream()
         {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
index c28733250a..c50812e253 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanScanDecoder.cs
@@ -106,7 +106,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 this.ParseProgressiveData();
             }
 
-            if (this.scanBuffer.BadMarker)
+            if (this.scanBuffer.HasBadMarker())
             {
                 this.stream.Position = this.scanBuffer.MarkerPosition;
             }
@@ -684,15 +684,23 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         {
             if (this.restartInterval > 0 && (--this.todo) == 0)
             {
+                if (this.scanBuffer.Marker == JpegConstants.Markers.XFF)
+                {
+                    if (!this.scanBuffer.FindNextMarker())
+                    {
+                        return false;
+                    }
+                }
+
                 this.todo = this.restartInterval;
 
-                if (this.scanBuffer.HasRestart())
+                if (this.scanBuffer.HasRestartMarker())
                 {
                     this.Reset();
                     return true;
                 }
 
-                if (this.scanBuffer.Marker != JpegConstants.Markers.XFF)
+                if (this.scanBuffer.HasBadMarker())
                 {
                     this.stream.Position = this.scanBuffer.MarkerPosition;
                     this.Reset();
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
index 21ed5018f3..4685ba2895 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/HuffmanTable.cs
@@ -1,20 +1,18 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-using SixLabors.Memory;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
 {
     /// <summary>
-    /// Represents a Huffman coding table containing basic coding data plus tables for accellerated computation.
+    /// Represents a Huffman coding table containing basic coding data plus tables for accelerated computation.
     /// </summary>
     [StructLayout(LayoutKind.Sequential)]
     internal unsafe struct HuffmanTable
     {
-        private readonly MemoryAllocator memoryAllocator;
         private bool isConfigured;
 
         /// <summary>
@@ -60,13 +58,11 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         /// <summary>
         /// Initializes a new instance of the <see cref="HuffmanTable"/> struct.
         /// </summary>
-        /// <param name="memoryAllocator">The <see cref="MemoryAllocator"/> to use for buffer allocations.</param>
         /// <param name="codeLengths">The code lengths</param>
         /// <param name="values">The huffman values</param>
-        public HuffmanTable(MemoryAllocator memoryAllocator, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
+        public HuffmanTable(ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
         {
             this.isConfigured = false;
-            this.memoryAllocator = memoryAllocator;
             Unsafe.CopyBlockUnaligned(ref this.Sizes[0], ref MemoryMarshal.GetReference(codeLengths), (uint)codeLengths.Length);
             Unsafe.CopyBlockUnaligned(ref this.Values[0], ref MemoryMarshal.GetReference(values), (uint)values.Length);
         }
@@ -81,33 +77,31 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
                 return;
             }
 
-            int p, si;
-            Span<char> huffsize = stackalloc char[257];
-            Span<uint> huffcode = stackalloc uint[257];
-            uint code;
+            Span<char> huffSize = stackalloc char[257];
+            Span<uint> huffCode = stackalloc uint[257];
 
             // Figure C.1: make table of Huffman code length for each symbol
-            p = 0;
+            int p = 0;
             for (int l = 1; l <= 16; l++)
             {
                 int i = this.Sizes[l];
                 while (i-- != 0)
                 {
-                    huffsize[p++] = (char)l;
+                    huffSize[p++] = (char)l;
                 }
             }
 
-            huffsize[p] = (char)0;
+            huffSize[p] = (char)0;
 
             // Figure C.2: generate the codes themselves
-            code = 0;
-            si = huffsize[0];
+            uint code = 0;
+            int si = huffSize[0];
             p = 0;
-            while (huffsize[p] != 0)
+            while (huffSize[p] != 0)
             {
-                while (huffsize[p] == si)
+                while (huffSize[p] == si)
                 {
-                    huffcode[p++] = code;
+                    huffCode[p++] = code;
                     code++;
                 }
 
@@ -121,10 +115,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             {
                 if (this.Sizes[l] != 0)
                 {
-                    int offset = p - (int)huffcode[p];
+                    int offset = p - (int)huffCode[p];
                     this.ValOffset[l] = offset;
                     p += this.Sizes[l];
-                    this.MaxCode[l] = huffcode[p - 1]; // Maximum code of length l
+                    this.MaxCode[l] = huffCode[p - 1]; // Maximum code of length l
                     this.MaxCode[l] <<= 64 - l; // Left justify
                     this.MaxCode[l] |= (1ul << (64 - l)) - 1;
                 }
@@ -150,14 +144,14 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             {
                 for (int i = 1; i <= this.Sizes[length]; i++, p++)
                 {
-                    // length = current code's length, p = its index in huffcode[] & huffval[].
+                    // length = current code's length, p = its index in huffCode[] & Values[].
                     // Generate left-justified code followed by all possible bit sequences
-                    int lookbits = (int)(huffcode[p] << (JpegConstants.Huffman.LookupBits - length));
+                    int lookBits = (int)(huffCode[p] << (JpegConstants.Huffman.LookupBits - length));
                     for (int ctr = 1 << (JpegConstants.Huffman.LookupBits - length); ctr > 0; ctr--)
                     {
-                        this.LookaheadSize[lookbits] = (byte)length;
-                        this.LookaheadValue[lookbits] = this.Values[p];
-                        lookbits++;
+                        this.LookaheadSize[lookBits] = (byte)length;
+                        this.LookaheadValue[lookBits] = this.Values[p];
+                        lookBits++;
                     }
                 }
             }
@@ -165,4 +159,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             this.isConfigured = true;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
index fd0c289b88..bf7c8f9c88 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -952,7 +952,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <param name="values">The values</param>
         [MethodImpl(InliningOptions.ShortMethod)]
         private void BuildHuffmanTable(HuffmanTable[] tables, int index, ReadOnlySpan<byte> codeLengths, ReadOnlySpan<byte> values)
-            => tables[index] = new HuffmanTable(this.configuration.MemoryAllocator, codeLengths, values);
+            => tables[index] = new HuffmanTable(codeLengths, values);
 
         /// <summary>
         /// Reads a <see cref="ushort"/> from the stream advancing it by two bytes
@@ -992,4 +992,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             return image;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
index 1e951f5d0e..14ad5635cd 100644
--- a/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
+++ b/tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj
@@ -6,11 +6,8 @@
     <OutputType>Exe</OutputType>
     <RootNamespace>SixLabors.ImageSharp.Benchmarks</RootNamespace>
     <TargetFrameworks>netcoreapp2.1;net472</TargetFrameworks>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
-    <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
-    <Prefer32Bit>false</Prefer32Bit>
+    <IsPackable>false</IsPackable>
+    <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
 
   <ItemGroup>
@@ -18,10 +15,6 @@
     <Compile Include="..\ImageSharp.Tests\TestUtilities\TestEnvironment.cs" Link="Tests\TestEnvironment.cs" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.1'">
-    <Compile Remove="Program.cs" />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" />
     <PackageReference Include="Colourful" />
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
index 56496fad1b..4a3ef9b956 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Images.cs
@@ -15,14 +15,10 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Baseline.Jpeg400,
                 TestImages.Jpeg.Baseline.Testorig420,
 
-                // BUG: The following image has a high difference compared to the expected output:
+                // BUG: The following image has a high difference compared to the expected output: 1.0096%
                 // TestImages.Jpeg.Baseline.Jpeg420Small,
 
-                // BUG: While we can decode this image we do not return the same output as libjpeg
-                // based decoders and are inserting a number of lines equal to the corrupted lines
-                // below said lines.
-                // TestImages.Jpeg.Issues.Fuzz.AccessViolationException922,
-
+                TestImages.Jpeg.Issues.Fuzz.AccessViolationException922,
                 TestImages.Jpeg.Baseline.Jpeg444,
                 TestImages.Jpeg.Baseline.Bad.BadEOF,
                 TestImages.Jpeg.Baseline.MultiScanBaselineCMYK,
diff --git a/tests/Images/External b/tests/Images/External
index 42b3b980ed..acc32594c1 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit 42b3b980ed07afd7b6603a5bfa6ffb91d6c8a124
+Subproject commit acc32594c125656840f8a17e69b0ebb49a370fa6

From cf61a08b31805263f44ce806d85509c1ad6911ba Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Fri, 14 Jun 2019 15:36:28 +0200
Subject: [PATCH 219/223] Bitmap decoder now can decode bitmap arrays (#930)

* Bitmap Decoder can now decode BitmapArray

* Add tests for bitmap metadata decoing. Fix an issue that a bitmap with a v5 header would be set in the metadata as an v4 header.

* Fixed issue with decoding bitmap arrays: color map size was not determined correctly. Added more test images.

* Refactor colormap size duplicate declaration.

* Fixed an issue, that when an unsupported bitmap is loaded the typ marker was not correctly shown in the error message
---
 .../Formats/Bmp/BmpArrayFileHeader.cs         | 53 ++++++++++++++
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 69 ++++++++++++-------
 src/ImageSharp/Formats/Bmp/BmpFileHeader.cs   |  6 +-
 .../Formats/Bmp/BmpImageFormatDetector.cs     |  8 ++-
 src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs   | 17 +++--
 .../Formats/Bmp/BmpDecoderTests.cs            | 64 +++++++++++++++--
 .../Formats/Bmp/BmpEncoderTests.cs            |  6 +-
 .../Formats/Bmp/BmpMetaDataTests.cs           | 32 ++++++++-
 tests/ImageSharp.Tests/TestImages.cs          |  8 +++
 tests/Images/Input/Bmp/9S.BMP                 |  3 +
 tests/Images/Input/Bmp/DIAMOND.BMP            |  3 +
 tests/Images/Input/Bmp/GMARBLE.BMP            |  3 +
 tests/Images/Input/Bmp/PINES.BMP              |  3 +
 tests/Images/Input/Bmp/SKATER.BMP             |  3 +
 tests/Images/Input/Bmp/SPADE.BMP              |  3 +
 tests/Images/Input/Bmp/SUNFLOW.BMP            |  3 +
 tests/Images/Input/Bmp/WARPD.BMP              |  3 +
 17 files changed, 240 insertions(+), 47 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Bmp/BmpArrayFileHeader.cs
 create mode 100644 tests/Images/Input/Bmp/9S.BMP
 create mode 100644 tests/Images/Input/Bmp/DIAMOND.BMP
 create mode 100644 tests/Images/Input/Bmp/GMARBLE.BMP
 create mode 100644 tests/Images/Input/Bmp/PINES.BMP
 create mode 100644 tests/Images/Input/Bmp/SKATER.BMP
 create mode 100644 tests/Images/Input/Bmp/SPADE.BMP
 create mode 100644 tests/Images/Input/Bmp/SUNFLOW.BMP
 create mode 100644 tests/Images/Input/Bmp/WARPD.BMP

diff --git a/src/ImageSharp/Formats/Bmp/BmpArrayFileHeader.cs b/src/ImageSharp/Formats/Bmp/BmpArrayFileHeader.cs
new file mode 100644
index 0000000000..e8afb422a8
--- /dev/null
+++ b/src/ImageSharp/Formats/Bmp/BmpArrayFileHeader.cs
@@ -0,0 +1,53 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace SixLabors.ImageSharp.Formats.Bmp
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    internal readonly struct BmpArrayFileHeader
+    {
+        public BmpArrayFileHeader(short type, int size, int offsetToNext, short width, short height)
+        {
+            this.Type = type;
+            this.Size = size;
+            this.OffsetToNext = offsetToNext;
+            this.ScreenWidth = width;
+            this.ScreenHeight = height;
+        }
+
+        /// <summary>
+        /// Gets the Bitmap identifier.
+        /// The field used to identify the bitmap file: 0x42 0x41 (Hex code points for B and A).
+        /// </summary>
+        public short Type { get; }
+
+        /// <summary>
+        /// Gets the size of this header.
+        /// </summary>
+        public int Size { get; }
+
+        /// <summary>
+        /// Gets the offset to next OS2BMPARRAYFILEHEADER.
+        /// This offset is calculated from the starting byte of the file. A value of zero indicates that this header is for the last image in the array list.
+        /// </summary>
+        public int OffsetToNext { get; }
+
+        /// <summary>
+        /// Gets the width of the image display in pixels.
+        /// </summary>
+        public short ScreenWidth { get; }
+
+        /// <summary>
+        /// Gets the height of the image display in pixels.
+        /// </summary>
+        public short ScreenHeight { get; }
+
+        public static BmpArrayFileHeader Parse(Span<byte> data)
+        {
+            return MemoryMarshal.Cast<byte, BmpArrayFileHeader>(data)[0];
+        }
+    }
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 294b49ed7e..1ceb35283a 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -1053,18 +1053,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             this.stream.Read(buffer, 0, BmpInfoHeader.HeaderSizeSize);
 
             int headerSize = BinaryPrimitives.ReadInt32LittleEndian(buffer);
-            if (headerSize < BmpInfoHeader.CoreSize)
+            if (headerSize < BmpInfoHeader.CoreSize || headerSize > BmpInfoHeader.MaxHeaderSize)
             {
                 BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. HeaderSize is '{headerSize}'.");
             }
 
-            int skipAmount = 0;
-            if (headerSize > BmpInfoHeader.MaxHeaderSize)
-            {
-                skipAmount = headerSize - BmpInfoHeader.MaxHeaderSize;
-                headerSize = BmpInfoHeader.MaxHeaderSize;
-            }
-
             // Read the rest of the header.
             this.stream.Read(buffer, BmpInfoHeader.HeaderSizeSize, headerSize - BmpInfoHeader.HeaderSizeSize);
 
@@ -1169,15 +1162,13 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             {
                 this.bmpMetadata.BitsPerPixel = (BmpBitsPerPixel)bitsPerPixel;
             }
-
-            // Skip the remaining header because we can't read those parts.
-            this.stream.Skip(skipAmount);
         }
 
         /// <summary>
         /// Reads the <see cref="BmpFileHeader"/> from the stream.
         /// </summary>
-        private void ReadFileHeader()
+        /// <returns>The color map size in bytes, if it could be determined by the file header. Otherwise -1.</returns>
+        private int ReadFileHeader()
         {
 #if NETCOREAPP2_1
             Span<byte> buffer = stackalloc byte[BmpFileHeader.Size];
@@ -1186,12 +1177,36 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 #endif
             this.stream.Read(buffer, 0, BmpFileHeader.Size);
 
-            this.fileHeader = BmpFileHeader.Parse(buffer);
-
-            if (this.fileHeader.Type != BmpConstants.TypeMarkers.Bitmap)
+            short fileTypeMarker = BinaryPrimitives.ReadInt16LittleEndian(buffer);
+            switch (fileTypeMarker)
             {
-                BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. File header bitmap type marker '{this.fileHeader.Type}'.");
+                case BmpConstants.TypeMarkers.Bitmap:
+                    this.fileHeader = BmpFileHeader.Parse(buffer);
+                    break;
+                case BmpConstants.TypeMarkers.BitmapArray:
+                    // The Array file header is followed by the bitmap file header of the first image.
+                    var arrayHeader = BmpArrayFileHeader.Parse(buffer);
+                    this.stream.Read(buffer, 0, BmpFileHeader.Size);
+                    this.fileHeader = BmpFileHeader.Parse(buffer);
+                    if (this.fileHeader.Type != BmpConstants.TypeMarkers.Bitmap)
+                    {
+                        BmpThrowHelper.ThrowNotSupportedException($"Unsupported bitmap file inside a BitmapArray file. File header bitmap type marker '{this.fileHeader.Type}'.");
+                    }
+
+                    if (arrayHeader.OffsetToNext != 0)
+                    {
+                        int colorMapSizeBytes = arrayHeader.OffsetToNext - arrayHeader.Size;
+                        return colorMapSizeBytes;
+                    }
+
+                    break;
+
+                default:
+                    BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. File header bitmap type marker '{fileTypeMarker}'.");
+                    break;
             }
+
+            return -1;
         }
 
         /// <summary>
@@ -1203,7 +1218,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         {
             this.stream = stream;
 
-            this.ReadFileHeader();
+            int colorMapSizeBytes = this.ReadFileHeader();
             this.ReadInfoHeader();
 
             // see http://www.drdobbs.com/architecture-and-design/the-bmp-file-format-part-1/184409517
@@ -1218,7 +1233,6 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 this.infoHeader.Height = -this.infoHeader.Height;
             }
 
-            int colorMapSize = -1;
             int bytesPerColorMapEntry = 4;
 
             if (this.infoHeader.ClrUsed == 0)
@@ -1227,35 +1241,38 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                     || this.infoHeader.BitsPerPixel == 4
                     || this.infoHeader.BitsPerPixel == 8)
                 {
-                    int colorMapSizeBytes = this.fileHeader.Offset - BmpFileHeader.Size - this.infoHeader.HeaderSize;
+                    if (colorMapSizeBytes == -1)
+                    {
+                        colorMapSizeBytes = this.fileHeader.Offset - BmpFileHeader.Size - this.infoHeader.HeaderSize;
+                    }
+
                     int colorCountForBitDepth = ImageMaths.GetColorCountForBitDepth(this.infoHeader.BitsPerPixel);
                     bytesPerColorMapEntry = colorMapSizeBytes / colorCountForBitDepth;
 
                     // Edge case for less-than-full-sized palette: bytesPerColorMapEntry should be at least 3.
                     bytesPerColorMapEntry = Math.Max(bytesPerColorMapEntry, 3);
-                    colorMapSize = colorMapSizeBytes;
                 }
             }
             else
             {
-                colorMapSize = this.infoHeader.ClrUsed * bytesPerColorMapEntry;
+                colorMapSizeBytes = this.infoHeader.ClrUsed * bytesPerColorMapEntry;
             }
 
             palette = null;
 
-            if (colorMapSize > 0)
+            if (colorMapSizeBytes > 0)
             {
                 // Usually the color palette is 1024 byte (256 colors * 4), but the documentation does not mention a size limit.
                 // Make sure, that we will not read pass the bitmap offset (starting position of image data).
-                if ((this.stream.Position + colorMapSize) > this.fileHeader.Offset)
+                if ((this.stream.Position + colorMapSizeBytes) > this.fileHeader.Offset)
                 {
                     BmpThrowHelper.ThrowImageFormatException(
-                        $"Reading the color map would read beyond the bitmap offset. Either the color map size of '{colorMapSize}' is invalid or the bitmap offset.");
+                        $"Reading the color map would read beyond the bitmap offset. Either the color map size of '{colorMapSizeBytes}' is invalid or the bitmap offset.");
                 }
 
-                palette = new byte[colorMapSize];
+                palette = new byte[colorMapSizeBytes];
 
-                this.stream.Read(palette, 0, colorMapSize);
+                this.stream.Read(palette, 0, colorMapSizeBytes);
             }
 
             this.infoHeader.VerifyDimensions();
diff --git a/src/ImageSharp/Formats/Bmp/BmpFileHeader.cs b/src/ImageSharp/Formats/Bmp/BmpFileHeader.cs
index e39a2af0e4..661275fc90 100644
--- a/src/ImageSharp/Formats/Bmp/BmpFileHeader.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpFileHeader.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
     internal readonly struct BmpFileHeader
     {
         /// <summary>
-        /// Defines of the data structure in the bitmap file.
+        /// Defines the size of the data structure in the bitmap file.
         /// </summary>
         public const int Size = 14;
 
@@ -69,4 +69,4 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             dest = this;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
index 4f862d9295..3d7510bc2a 100644
--- a/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpImageFormatDetector.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -22,7 +22,9 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         private bool IsSupportedFileFormat(ReadOnlySpan<byte> header)
         {
-            return header.Length >= this.HeaderSize && BinaryPrimitives.ReadInt16LittleEndian(header) == BmpConstants.TypeMarkers.Bitmap;
+            short fileTypeMarker = BinaryPrimitives.ReadInt16LittleEndian(header);
+            return header.Length >= this.HeaderSize &&
+                   (fileTypeMarker == BmpConstants.TypeMarkers.Bitmap || fileTypeMarker == BmpConstants.TypeMarkers.BitmapArray);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
index 6da5f73e3f..ca90020d85 100644
--- a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 using System;
 using System.Buffers.Binary;
@@ -51,10 +51,15 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         public const int SizeV4 = 108;
 
+        /// <summary>
+        /// Defines the size of the BITMAPINFOHEADER (BMP Version 5) data structure in the bitmap file.
+        /// </summary>
+        public const int SizeV5 = 124;
+
         /// <summary>
         /// Defines the size of the biggest supported header data structure in the bitmap file.
         /// </summary>
-        public const int MaxHeaderSize = SizeV4;
+        public const int MaxHeaderSize = SizeV5;
 
         /// <summary>
         /// Defines the size of the <see cref="HeaderSize"/> field.
@@ -272,7 +277,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// Parses the BITMAPCOREHEADER (BMP Version 2) consisting of the headerSize, width, height, planes, and bitsPerPixel fields (12 bytes).
         /// </summary>
         /// <param name="data">The data to parse.</param>
-        /// <returns>Parsed header</returns>
+        /// <returns>The parsed header.</returns>
         /// <seealso href="https://msdn.microsoft.com/en-us/library/windows/desktop/dd183372.aspx"/>
         public static BmpInfoHeader ParseCore(ReadOnlySpan<byte> data)
         {
@@ -289,7 +294,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// are 4 bytes instead of 2, resulting in 16 bytes total.
         /// </summary>
         /// <param name="data">The data to parse.</param>
-        /// <returns>Parsed header</returns>
+        /// <returns>The parsed header.</returns>
         /// <seealso href="https://www.fileformat.info/format/os2bmp/egff.htm"/>
         public static BmpInfoHeader ParseOs22Short(ReadOnlySpan<byte> data)
         {
@@ -406,7 +411,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <seealso href="http://www.fileformat.info/format/bmp/egff.htm"/>
         public static BmpInfoHeader ParseV4(ReadOnlySpan<byte> data)
         {
-            if (data.Length != SizeV4)
+            if (data.Length < SizeV4)
             {
                 throw new ArgumentException(nameof(data), $"Must be {SizeV4} bytes. Was {data.Length} bytes.");
             }
@@ -457,4 +462,4 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index c4dfa724cc..a95703609b 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -343,7 +343,6 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         }
 
         [Theory]
-        [WithFile(Rgba32bf56AdobeV3, PixelTypes.Rgba32)]
         [WithFile(Rgb32h52AdobeV3, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeAdobeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
@@ -355,6 +354,18 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             }
         }
 
+        [Theory]
+        [WithFile(Rgba32bf56AdobeV3, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecodeAdobeBmpv3_WithAlpha<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider, new MagickReferenceDecoder());
+            }
+        }
+
         [Theory]
         [WithFile(WinBmpv4, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeBmpv4<TPixel>(TestImageProvider<TPixel> provider)
@@ -429,12 +440,35 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         [InlineData(Bit4, 4)]
         [InlineData(Bit1, 1)]
         [InlineData(Bit1Pal1, 1)]
-        public void Identify(string imagePath, int expectedPixelSize)
+        public void Identify_DetectsCorrectPixelType(string imagePath, int expectedPixelSize)
         {
             var testFile = TestFile.Create(imagePath);
             using (var stream = new MemoryStream(testFile.Bytes, false))
             {
-                Assert.Equal(expectedPixelSize, Image.Identify(stream)?.PixelType?.BitsPerPixel);
+                IImageInfo imageInfo = Image.Identify(stream);
+                Assert.NotNull(imageInfo);
+                Assert.Equal(expectedPixelSize, imageInfo.PixelType?.BitsPerPixel);
+            }
+        }
+
+        [Theory]
+        [InlineData(Bit32Rgb, 127, 64)]
+        [InlineData(Car, 600, 450)]
+        [InlineData(Bit16, 127, 64)]
+        [InlineData(Bit16Inverted, 127, 64)]
+        [InlineData(Bit8, 127, 64)]
+        [InlineData(Bit8Inverted, 127, 64)]
+        [InlineData(RLE8, 491, 272)]
+        [InlineData(RLE8Inverted, 491, 272)]
+        public void Identify_DetectsCorrectWidthAndHeight(string imagePath, int expectedWidth, int expectedHeight)
+        {
+            var testFile = TestFile.Create(imagePath);
+            using (var stream = new MemoryStream(testFile.Bytes, false))
+            {
+                IImageInfo imageInfo = Image.Identify(stream);
+                Assert.NotNull(imageInfo);
+                Assert.Equal(expectedWidth, imageInfo.Width);
+                Assert.Equal(expectedHeight, imageInfo.Height);
             }
         }
 
@@ -465,8 +499,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             {
                 image.DebugSave(provider);
 
-                // TODO: Neither System.Drawing not MagickReferenceDecoder 
-                // can correctly decode this file.
+                // TODO: Neither System.Drawing or MagickReferenceDecoder can correctly decode this file.
                 // image.CompareToOriginal(provider);
             }
         }
@@ -486,5 +519,26 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
                 // image.CompareToOriginal(provider, new MagickReferenceDecoder());
             }
         }
+
+        [Theory]
+        [WithFile(Os2BitmapArray9s, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArrayDiamond, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArraySkater, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArraySpade, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArraySunflower, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArrayMarble, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArrayWarpd, PixelTypes.Rgba32)]
+        [WithFile(Os2BitmapArrayPines, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_Os2BitmapArray<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder()))
+            {
+                image.DebugSave(provider);
+
+                // TODO: Neither System.Drawing or MagickReferenceDecoder can correctly decode this file.
+                // image.CompareToOriginal(provider);
+            }
+        }
     }
 }
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
index 178e652ae7..7412f70a11 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpEncoderTests.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.IO;
@@ -14,6 +14,8 @@ using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using Xunit;
 using Xunit.Abstractions;
 
+// ReSharper disable InconsistentNaming
+
 namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 {
     using static TestImages.Bmp;
@@ -262,4 +264,4 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
index ab72214f6c..da17dfb983 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpMetaDataTests.cs
@@ -1,11 +1,17 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System.IO;
+
 using SixLabors.ImageSharp.Formats.Bmp;
 using Xunit;
 
+// ReSharper disable InconsistentNaming
+
 namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 {
+    using static TestImages.Bmp;
+
     public class BmpMetaDataTests
     {
         [Fact]
@@ -18,5 +24,27 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
 
             Assert.False(meta.BitsPerPixel.Equals(clone.BitsPerPixel));
         }
+
+        [Theory]
+        [InlineData(WinBmpv2, BmpInfoHeaderType.WinVersion2)]
+        [InlineData(WinBmpv3, BmpInfoHeaderType.WinVersion3)]
+        [InlineData(WinBmpv4, BmpInfoHeaderType.WinVersion4)]
+        [InlineData(WinBmpv5, BmpInfoHeaderType.WinVersion5)]
+        [InlineData(Os2v2Short, BmpInfoHeaderType.Os2Version2Short)]
+        [InlineData(Rgb32h52AdobeV3, BmpInfoHeaderType.AdobeVersion3)]
+        [InlineData(Rgba32bf56AdobeV3, BmpInfoHeaderType.AdobeVersion3WithAlpha)]
+        [InlineData(Os2v2, BmpInfoHeaderType.Os2Version2)]
+        public void Identify_DetectsCorrectBitmapInfoHeaderType(string imagePath, BmpInfoHeaderType expectedInfoHeaderType)
+        {
+            var testFile = TestFile.Create(imagePath);
+            using (var stream = new MemoryStream(testFile.Bytes, false))
+            {
+                IImageInfo imageInfo = Image.Identify(stream);
+                Assert.NotNull(imageInfo);
+                BmpMetadata bitmapMetaData = imageInfo.Metadata.GetFormatMetadata(BmpFormat.Instance);
+                Assert.NotNull(bitmapMetaData);
+                Assert.Equal(expectedInfoHeaderType, bitmapMetaData.InfoHeaderType);
+            }
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index d041f48544..1019a5b084 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -261,6 +261,14 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
             public const string Os2v2 = "Bmp/pal8os2v2.bmp";
+            public const string Os2BitmapArray9s = "Bmp/9S.BMP";
+            public const string Os2BitmapArrayDiamond = "Bmp/DIAMOND.BMP";
+            public const string Os2BitmapArrayMarble = "Bmp/GMARBLE.BMP";
+            public const string Os2BitmapArraySkater = "Bmp/SKATER.BMP";
+            public const string Os2BitmapArraySpade = "Bmp/SPADE.BMP";
+            public const string Os2BitmapArraySunflower = "Bmp/SUNFLOW.BMP";
+            public const string Os2BitmapArrayWarpd = "Bmp/WARPD.BMP";
+            public const string Os2BitmapArrayPines = "Bmp/PINES.BMP";
             public const string LessThanFullSizedPalette = "Bmp/pal8os2sp.bmp";
             public const string Pal8Offset = "Bmp/pal8offs.bmp";
             public const string OversizedPalette = "Bmp/pal8oversizepal.bmp";
diff --git a/tests/Images/Input/Bmp/9S.BMP b/tests/Images/Input/Bmp/9S.BMP
new file mode 100644
index 0000000000..f6f937901c
--- /dev/null
+++ b/tests/Images/Input/Bmp/9S.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b54244f4ef0968568e0d8255707763f6c2027238ff66a22580ae12a019c33a9f
+size 2684
diff --git a/tests/Images/Input/Bmp/DIAMOND.BMP b/tests/Images/Input/Bmp/DIAMOND.BMP
new file mode 100644
index 0000000000..512b156358
--- /dev/null
+++ b/tests/Images/Input/Bmp/DIAMOND.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1a7133850f670732c39cb343615f4443c934272002edfa5373a7286c1967e2cc
+size 2684
diff --git a/tests/Images/Input/Bmp/GMARBLE.BMP b/tests/Images/Input/Bmp/GMARBLE.BMP
new file mode 100644
index 0000000000..52a0fb7f0f
--- /dev/null
+++ b/tests/Images/Input/Bmp/GMARBLE.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:575d176563c98e71ec68ad9ee96e192393ba7a6296b0a27c55a3c1037fc18a96
+size 49585
diff --git a/tests/Images/Input/Bmp/PINES.BMP b/tests/Images/Input/Bmp/PINES.BMP
new file mode 100644
index 0000000000..1bd55e4b19
--- /dev/null
+++ b/tests/Images/Input/Bmp/PINES.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6b6aa7b3f34cf370f7e34912fe5079b8e72cb5475722d658867d1a164957672
+size 61377
diff --git a/tests/Images/Input/Bmp/SKATER.BMP b/tests/Images/Input/Bmp/SKATER.BMP
new file mode 100644
index 0000000000..0ba7113bee
--- /dev/null
+++ b/tests/Images/Input/Bmp/SKATER.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2a5d21e7eb2b48e277cd06c884dd98b66c2d036af57a8545316e0c68278bcf21
+size 7242
diff --git a/tests/Images/Input/Bmp/SPADE.BMP b/tests/Images/Input/Bmp/SPADE.BMP
new file mode 100644
index 0000000000..e61e5e0c76
--- /dev/null
+++ b/tests/Images/Input/Bmp/SPADE.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9f97211351e9fd297d81ab5cc359eab8fdf09c821c66458d722e3f3a80dc5e4a
+size 2684
diff --git a/tests/Images/Input/Bmp/SUNFLOW.BMP b/tests/Images/Input/Bmp/SUNFLOW.BMP
new file mode 100644
index 0000000000..08fb3070e2
--- /dev/null
+++ b/tests/Images/Input/Bmp/SUNFLOW.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8456fc57a11d2d5f53eafc1aa49865db8df615bcbd4ccfd2a78e2ba024b9af2d
+size 51753
diff --git a/tests/Images/Input/Bmp/WARPD.BMP b/tests/Images/Input/Bmp/WARPD.BMP
new file mode 100644
index 0000000000..db9128bf37
--- /dev/null
+++ b/tests/Images/Input/Bmp/WARPD.BMP
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ad3623de4da91c037866a2a504d5b9c62c48224a1b399b5cbb72fb6b5a5f5230
+size 2363136

From 7d4e461a19f3d5d00ea11fb03daaa9ecb7a39c61 Mon Sep 17 00:00:00 2001
From: Fredrik Eilertsen <fredeil@users.noreply.github.com>
Date: Sat, 15 Jun 2019 01:27:29 +0200
Subject: [PATCH 220/223] Throw UnkownFormatException on Image.Load  (#932)

* Throw ImageFormatException on load

* Unseal class and make constructor internal
- This is so that no one can new it up / inherit it outside of the assembly

* Add new exception for distinguish between different exception
- This will be used on image.load operations with invalid image streams

* ImageFormatException -> UnkownImageFormatException

* Add Image.Load throws exception tests
---
 .../Common/Exceptions/ImageFormatException.cs |  8 +--
 .../Exceptions/UnknownImageFormatException.cs | 36 +++++++++++++
 src/ImageSharp/Image.FromStream.cs            | 20 +++++--
 ...ts.Load_FromStream_ThrowsRightException.cs | 52 +++++++++++++++++++
 4 files changed, 108 insertions(+), 8 deletions(-)
 create mode 100644 src/ImageSharp/Common/Exceptions/UnknownImageFormatException.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_ThrowsRightException.cs

diff --git a/src/ImageSharp/Common/Exceptions/ImageFormatException.cs b/src/ImageSharp/Common/Exceptions/ImageFormatException.cs
index 89877b1b66..8b9dbe1b80 100644
--- a/src/ImageSharp/Common/Exceptions/ImageFormatException.cs
+++ b/src/ImageSharp/Common/Exceptions/ImageFormatException.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -9,14 +9,14 @@ namespace SixLabors.ImageSharp
     /// The exception that is thrown when the library tries to load
     /// an image, which has an invalid format.
     /// </summary>
-    public sealed class ImageFormatException : Exception
+    public class ImageFormatException : Exception
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ImageFormatException"/> class with the name of the
         /// parameter that causes this exception.
         /// </summary>
         /// <param name="errorMessage">The error message that explains the reason for this exception.</param>
-        public ImageFormatException(string errorMessage)
+        internal ImageFormatException(string errorMessage)
             : base(errorMessage)
         {
         }
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp
         /// <param name="errorMessage">The error message that explains the reason for this exception.</param>
         /// <param name="innerException">The exception that is the cause of the current exception, or a null reference (Nothing in Visual Basic)
         /// if no inner exception is specified.</param>
-        public ImageFormatException(string errorMessage, Exception innerException)
+        internal ImageFormatException(string errorMessage, Exception innerException)
             : base(errorMessage, innerException)
         {
         }
diff --git a/src/ImageSharp/Common/Exceptions/UnknownImageFormatException.cs b/src/ImageSharp/Common/Exceptions/UnknownImageFormatException.cs
new file mode 100644
index 0000000000..ca6e1fe6ed
--- /dev/null
+++ b/src/ImageSharp/Common/Exceptions/UnknownImageFormatException.cs
@@ -0,0 +1,36 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// The exception that is thrown when the library tries to load
+    /// an image which has an unkown format.
+    /// </summary>
+    public sealed class UnknownImageFormatException : ImageFormatException
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UnknownImageFormatException"/> class with the name of the
+        /// parameter that causes this exception.
+        /// </summary>
+        /// <param name="errorMessage">The error message that explains the reason for this exception.</param>
+        public UnknownImageFormatException(string errorMessage)
+            : base(errorMessage)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UnknownImageFormatException"/> class with a specified
+        /// error message and the exception that is the cause of this exception.
+        /// </summary>
+        /// <param name="errorMessage">The error message that explains the reason for this exception.</param>
+        /// <param name="innerException">The exception that is the cause of the current exception, or a null reference (Nothing in Visual Basic)
+        /// if no inner exception is specified.</param>
+        public UnknownImageFormatException(string errorMessage, Exception innerException)
+            : base(errorMessage, innerException)
+        {
+        }
+    }
+}
diff --git a/src/ImageSharp/Image.FromStream.cs b/src/ImageSharp/Image.FromStream.cs
index 74b99dfb3f..c4336c9aca 100644
--- a/src/ImageSharp/Image.FromStream.cs
+++ b/src/ImageSharp/Image.FromStream.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -62,6 +62,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image"/>.</returns>>
         public static Image Load(Stream stream, out IImageFormat format) => Load(Configuration.Default, stream, out format);
 
@@ -71,6 +72,7 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image"/>.</returns>>
         public static Image Load(Stream stream) => Load(Configuration.Default, stream);
 
@@ -81,6 +83,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image"/>.</returns>>
         public static Image Load(Stream stream, IImageDecoder decoder) => Load(Configuration.Default, stream, decoder);
 
@@ -92,6 +95,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image"/>.</returns>>
         public static Image Load(Configuration config, Stream stream, IImageDecoder decoder) =>
             WithSeekableStream(config, stream, s => decoder.Decode(config, s));
@@ -102,6 +106,7 @@ namespace SixLabors.ImageSharp
         /// <param name="config">The config for the decoder.</param>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image"/>.</returns>>
         public static Image Load(Configuration config, Stream stream) => Load(config, stream, out _);
 
@@ -110,6 +115,7 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Stream stream)
@@ -122,6 +128,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Stream stream, out IImageFormat format)
@@ -134,6 +141,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Stream stream, IImageDecoder decoder)
@@ -147,6 +155,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="decoder">The decoder.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Configuration config, Stream stream, IImageDecoder decoder)
@@ -159,6 +168,7 @@ namespace SixLabors.ImageSharp
         /// <param name="config">The configuration options.</param>
         /// <param name="stream">The stream containing image information.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Configuration config, Stream stream)
@@ -172,6 +182,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>>
         public static Image<TPixel> Load<TPixel>(Configuration config, Stream stream, out IImageFormat format)
@@ -195,7 +206,7 @@ namespace SixLabors.ImageSharp
                 sb.AppendLine($" - {val.Key.Name} : {val.Value.GetType().Name}");
             }
 
-            throw new NotSupportedException(sb.ToString());
+            throw new UnknownImageFormatException(sb.ToString());
         }
 
         /// <summary>
@@ -206,6 +217,7 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream containing image information.</param>
         /// <param name="format">the mime type of the decoded image.</param>
         /// <exception cref="NotSupportedException">Thrown if the stream is not readable.</exception>
+        /// <exception cref="UnknownImageFormatException">Image cannot be loaded.</exception>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
         public static Image Load(Configuration config, Stream stream, out IImageFormat format)
         {
@@ -227,7 +239,7 @@ namespace SixLabors.ImageSharp
                 sb.AppendLine($" - {val.Key.Name} : {val.Value.GetType().Name}");
             }
 
-            throw new NotSupportedException(sb.ToString());
+            throw new UnknownImageFormatException(sb.ToString());
         }
 
         private static T WithSeekableStream<T>(Configuration config, Stream stream, Func<Stream, T> action)
@@ -257,4 +269,4 @@ namespace SixLabors.ImageSharp
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_ThrowsRightException.cs b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_ThrowsRightException.cs
new file mode 100644
index 0000000000..df1f73c7a0
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageTests.Load_FromStream_ThrowsRightException.cs
@@ -0,0 +1,52 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.IO;
+
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public partial class ImageTests
+    {
+        public class Load_FromStream_Throws : IDisposable
+        {
+            private static readonly byte[] Data = new byte[] { 0x01 };
+            
+            private MemoryStream Stream { get; } = new MemoryStream(Data);
+            
+            [Fact]
+            public void Image_Load_Throws_UknownImageFormatException()
+            {
+                Assert.Throws<UnknownImageFormatException>(() =>
+                {
+                    using (var img = Image.Load(Configuration.Default, this.Stream, out IImageFormat format))
+                    {
+                    }
+                });
+            }
+
+            [Fact]
+            public void Image_Load_T_Throws_UknownImageFormatException()
+            {
+                Assert.Throws<UnknownImageFormatException>(() =>
+                {
+                    using (var img = Image.Load<Rgba32>(Configuration.Default, this.Stream, out IImageFormat format))
+                    {
+                    }
+                });
+            }
+
+            public void Dispose()
+            {
+                this.Stream?.Dispose();
+            }
+        }
+    }
+}

From d5d69d0bdc5298bb18512396932ea4880fcf3b69 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Wed, 19 Jun 2019 11:07:36 +1000
Subject: [PATCH 221/223] Fix #937 (#938)

---
 src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs  | 6 +++---
 tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs | 7 ++++---
 tests/ImageSharp.Tests/TestImages.cs                  | 1 +
 tests/Images/Input/Png/zlib-overflow2.png             | 3 +++
 4 files changed, 11 insertions(+), 6 deletions(-)
 create mode 100644 tests/Images/Input/Png/zlib-overflow2.png

diff --git a/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs b/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
index 71141a8939..405eeafeb9 100644
--- a/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
+++ b/src/ImageSharp/Formats/Png/Zlib/ZlibInflateStream.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
@@ -140,7 +140,7 @@ namespace SixLabors.ImageSharp.Formats.Png.Zlib
 
                 offset += bytesRead;
 
-                if (offset >= length)
+                if (offset >= length || offset >= count)
                 {
                     return bytesRead;
                 }
@@ -249,4 +249,4 @@ namespace SixLabors.ImageSharp.Formats.Png.Zlib
             this.compressedStream = new DeflateStream(this, CompressionMode.Decompress, true);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index 70d191d74e..5bb2db7848 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 // ReSharper disable InconsistentNaming
@@ -42,7 +42,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             TestImages.Png.Rgb24BppTrans,
             TestImages.Png.GrayAlpha8Bit,
             TestImages.Png.Gray1BitTrans,
-            TestImages.Png.Bad.ZlibOverflow
+            TestImages.Png.Bad.ZlibOverflow,
+            TestImages.Png.Bad.ZlibOverflow2
         };
 
         public static readonly string[] TestImages48Bpp =
@@ -294,4 +295,4 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 1019a5b084..3c732c32d3 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -87,6 +87,7 @@ namespace SixLabors.ImageSharp.Tests
                 public const string ChunkLength2 = "Png/chunklength2.png";
                 public const string CorruptedChunk = "Png/big-corrupted-chunk.png";
                 public const string ZlibOverflow = "Png/zlib-overflow.png";
+                public const string ZlibOverflow2 = "Png/zlib-overflow2.png";
             }
 
             public static readonly string[] All =
diff --git a/tests/Images/Input/Png/zlib-overflow2.png b/tests/Images/Input/Png/zlib-overflow2.png
new file mode 100644
index 0000000000..bb95cfee8d
--- /dev/null
+++ b/tests/Images/Input/Png/zlib-overflow2.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3994ef9f044fd589a412409b35cf23d346da43af0d82e25f2c11a36b464c7599
+size 16887

From 50848a6d276f39afe2f99f50bc2f8adcdcd74d36 Mon Sep 17 00:00:00 2001
From: Brian Popow <38701097+brianpopow@users.noreply.github.com>
Date: Mon, 1 Jul 2019 07:12:48 +0200
Subject: [PATCH 222/223] Add support for decoding RLE24 Bitmaps (#939)

* Add support for decoding RLE24

* Simplified determining colorMapSize, OS/2 always has 3 bytes for each palette entry

* Enum value for RLE24 is remapped to a different value, to be clearly separate from valid windows values.
---
 src/ImageSharp/Formats/Bmp/BmpCompression.cs  |  23 +-
 src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs  | 227 +++++++++++++++---
 .../Formats/Bmp/BmpFileMarkerType.cs          |  41 ++++
 src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs   |   6 +-
 .../Formats/Bmp/BmpDecoderTests.cs            |  17 ++
 tests/ImageSharp.Tests/TestImages.cs          |   4 +
 tests/Images/Input/Bmp/ba-bm.bmp              |   3 +
 tests/Images/Input/Bmp/rgb24rle24.bmp         |   3 +
 tests/Images/Input/Bmp/rle24rlecut.bmp        |   3 +
 tests/Images/Input/Bmp/rle24rletrns.bmp       |   3 +
 10 files changed, 296 insertions(+), 34 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Bmp/BmpFileMarkerType.cs
 create mode 100644 tests/Images/Input/Bmp/ba-bm.bmp
 create mode 100644 tests/Images/Input/Bmp/rgb24rle24.bmp
 create mode 100644 tests/Images/Input/Bmp/rle24rlecut.bmp
 create mode 100644 tests/Images/Input/Bmp/rle24rletrns.bmp

diff --git a/src/ImageSharp/Formats/Bmp/BmpCompression.cs b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
index be275019e6..27a0e121b6 100644
--- a/src/ImageSharp/Formats/Bmp/BmpCompression.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpCompression.cs
@@ -1,10 +1,10 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 namespace SixLabors.ImageSharp.Formats.Bmp
 {
     /// <summary>
-    /// Defines how the compression type of the image data
+    /// Defines the compression type of the image data
     /// in the bitmap file.
     /// </summary>
     internal enum BmpCompression : int
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         /// <summary>
         /// Two bytes are one data record. If the first byte is not zero, the
-        /// next two half bytes will be repeated as much as the value of the first byte.
+        /// next byte will be repeated as much as the value of the first byte.
         /// If the first byte is zero, the record has different meanings, depending
         /// on the second byte. If the second byte is zero, it is the end of the row,
         /// if it is one, it is the end of the image.
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
 
         /// <summary>
         /// Two bytes are one data record. If the first byte is not zero, the
-        /// next byte will be repeated as much as the value of the first byte.
+        /// next two half bytes will be repeated as much as the value of the first byte.
         /// If the first byte is zero, the record has different meanings, depending
         /// on the second byte. If the second byte is zero, it is the end of the row,
         /// if it is one, it is the end of the image.
@@ -60,6 +60,17 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// Specifies that the bitmap is not compressed and that the color table consists of four DWORD color
         /// masks that specify the red, green, blue, and alpha components of each pixel.
         /// </summary>
-        BI_ALPHABITFIELDS = 6
+        BI_ALPHABITFIELDS = 6,
+
+        /// <summary>
+        /// OS/2 specific compression type.
+        /// Similar to run length encoding of 4 and 8 bit.
+        /// The only difference is that run values encoded are three bytes in size (one byte per RGB color component),
+        /// rather than four or eight bits in size.
+        ///
+        /// Note: Because compression value of 4 is ambiguous for BI_RGB for windows and RLE24 for OS/2, the enum value is remapped
+        /// to a different value.
+        /// </summary>
+        RLE24 = 100,
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
index 1ceb35283a..906fc53fef 100644
--- a/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpDecoderCore.cs
@@ -39,22 +39,22 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         private const int DefaultRgb16BMask = 0x1F;
 
         /// <summary>
-        /// RLE8 flag value that indicates following byte has special meaning.
+        /// RLE flag value that indicates following byte has special meaning.
         /// </summary>
         private const int RleCommand = 0x00;
 
         /// <summary>
-        /// RLE8 flag value marking end of a scan line.
+        /// RLE flag value marking end of a scan line.
         /// </summary>
         private const int RleEndOfLine = 0x00;
 
         /// <summary>
-        /// RLE8 flag value marking end of bitmap data.
+        /// RLE flag value marking end of bitmap data.
         /// </summary>
         private const int RleEndOfBitmap = 0x01;
 
         /// <summary>
-        /// RLE8 flag value marking the start of [x,y] offset instruction.
+        /// RLE flag value marking the start of [x,y] offset instruction.
         /// </summary>
         private const int RleDelta = 0x02;
 
@@ -78,6 +78,11 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// </summary>
         private BmpFileHeader fileHeader;
 
+        /// <summary>
+        /// Indicates which bitmap file marker was read.
+        /// </summary>
+        private BmpFileMarkerType fileMarkerType;
+
         /// <summary>
         /// The info header containing detailed information about the bitmap.
         /// </summary>
@@ -167,6 +172,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                         }
 
                         break;
+
+                    case BmpCompression.RLE24:
+                        this.ReadRle24(pixels, this.infoHeader.Width, this.infoHeader.Height, inverted);
+
+                        break;
+
                     case BmpCompression.RLE8:
                     case BmpCompression.RLE4:
                         this.ReadRle(this.infoHeader.Compression, pixels, palette, this.infoHeader.Width, this.infoHeader.Height, inverted);
@@ -349,6 +360,75 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             }
         }
 
+        /// <summary>
+        /// Looks up color values and builds the image from de-compressed RLE24.
+        /// </summary>
+        /// <typeparam name="TPixel">The pixel format.</typeparam>
+        /// <param name="pixels">The <see cref="Buffer2D{TPixel}"/> to assign the palette to.</param>
+        /// <param name="width">The width of the bitmap.</param>
+        /// <param name="height">The height of the bitmap.</param>
+        /// <param name="inverted">Whether the bitmap is inverted.</param>
+        private void ReadRle24<TPixel>(Buffer2D<TPixel> pixels, int width, int height, bool inverted)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            TPixel color = default;
+            using (IMemoryOwner<byte> buffer = this.memoryAllocator.Allocate<byte>(width * height * 3, AllocationOptions.Clean))
+            using (Buffer2D<bool> undefinedPixels = this.memoryAllocator.Allocate2D<bool>(width, height, AllocationOptions.Clean))
+            using (IMemoryOwner<bool> rowsWithUndefinedPixels = this.memoryAllocator.Allocate<bool>(height, AllocationOptions.Clean))
+            {
+                Span<bool> rowsWithUndefinedPixelsSpan = rowsWithUndefinedPixels.Memory.Span;
+                Span<byte> bufferSpan = buffer.GetSpan();
+                this.UncompressRle24(width, bufferSpan, undefinedPixels.GetSpan(), rowsWithUndefinedPixelsSpan);
+                for (int y = 0; y < height; y++)
+                {
+                    int newY = Invert(y, height, inverted);
+                    Span<TPixel> pixelRow = pixels.GetRowSpan(newY);
+                    bool rowHasUndefinedPixels = rowsWithUndefinedPixelsSpan[y];
+                    if (rowHasUndefinedPixels)
+                    {
+                        // Slow path with undefined pixels.
+                        for (int x = 0; x < width; x++)
+                        {
+                            int idx = (y * width * 3) + (x * 3);
+                            if (undefinedPixels[x, y])
+                            {
+                                switch (this.options.RleSkippedPixelHandling)
+                                {
+                                    case RleSkippedPixelHandling.FirstColorOfPalette:
+                                        color.FromBgr24(Unsafe.As<byte, Bgr24>(ref bufferSpan[idx]));
+                                        break;
+                                    case RleSkippedPixelHandling.Transparent:
+                                        color.FromVector4(Vector4.Zero);
+                                        break;
+
+                                    // Default handling for skipped pixels is black (which is what System.Drawing is also doing).
+                                    default:
+                                        color.FromVector4(new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
+                                        break;
+                                }
+                            }
+                            else
+                            {
+                                color.FromBgr24(Unsafe.As<byte, Bgr24>(ref bufferSpan[idx]));
+                            }
+
+                            pixelRow[x] = color;
+                        }
+                    }
+                    else
+                    {
+                        // Fast path without any undefined pixels.
+                        for (int x = 0; x < width; x++)
+                        {
+                            int idx = (y * width * 3) + (x * 3);
+                            color.FromBgr24(Unsafe.As<byte, Bgr24>(ref bufferSpan[idx]));
+                            pixelRow[x] = color;
+                        }
+                    }
+                }
+            }
+        }
+
         /// <summary>
         /// Produce uncompressed bitmap data from a RLE4 stream.
         /// </summary>
@@ -545,7 +625,95 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         }
 
         /// <summary>
-        /// Keeps track of skipped / undefined pixels, when EndOfBitmap command occurs.
+        /// Produce uncompressed bitmap data from a RLE24 stream.
+        /// </summary>
+        /// <remarks>
+        /// <br/>If first byte is 0, the second byte may have special meaning.
+        /// <br/>Otherwise, the first byte is the length of the run and following three bytes are the color for the run.
+        /// </remarks>
+        /// <param name="w">The width of the bitmap.</param>
+        /// <param name="buffer">Buffer for uncompressed data.</param>
+        /// <param name="undefinedPixels">Keeps track of skipped and therefore undefined pixels.</param>
+        /// <param name="rowsWithUndefinedPixels">Keeps track of rows, which have undefined pixels.</param>
+        private void UncompressRle24(int w, Span<byte> buffer, Span<bool> undefinedPixels, Span<bool> rowsWithUndefinedPixels)
+        {
+#if NETCOREAPP2_1
+            Span<byte> cmd = stackalloc byte[2];
+#else
+            byte[] cmd = new byte[2];
+#endif
+            int uncompressedPixels = 0;
+
+            while (uncompressedPixels < buffer.Length)
+            {
+                if (this.stream.Read(cmd, 0, cmd.Length) != 2)
+                {
+                    BmpThrowHelper.ThrowImageFormatException("Failed to read 2 bytes from stream while uncompressing RLE24 bitmap.");
+                }
+
+                if (cmd[0] == RleCommand)
+                {
+                    switch (cmd[1])
+                    {
+                        case RleEndOfBitmap:
+                            int skipEoB = (buffer.Length - (uncompressedPixels * 3)) / 3;
+                            RleSkipEndOfBitmap(uncompressedPixels, w, skipEoB, undefinedPixels, rowsWithUndefinedPixels);
+
+                            return;
+
+                        case RleEndOfLine:
+                            uncompressedPixels += RleSkipEndOfLine(uncompressedPixels, w, undefinedPixels, rowsWithUndefinedPixels);
+
+                            break;
+
+                        case RleDelta:
+                            int dx = this.stream.ReadByte();
+                            int dy = this.stream.ReadByte();
+                            uncompressedPixels += RleSkipDelta(uncompressedPixels, w, dx, dy, undefinedPixels, rowsWithUndefinedPixels);
+
+                            break;
+
+                        default:
+                            // If the second byte > 2, we are in 'absolute mode'.
+                            // Take this number of bytes from the stream as uncompressed data.
+                            int length = cmd[1];
+
+                            byte[] run = new byte[length * 3];
+
+                            this.stream.Read(run, 0, run.Length);
+
+                            run.AsSpan().CopyTo(buffer.Slice(start: uncompressedPixels * 3));
+
+                            uncompressedPixels += length;
+
+                            // Absolute mode data is aligned to two-byte word-boundary.
+                            int padding = run.Length & 1;
+
+                            this.stream.Skip(padding);
+
+                            break;
+                    }
+                }
+                else
+                {
+                    int max = uncompressedPixels + cmd[0];
+                    byte blueIdx = cmd[1];
+                    byte greenIdx = (byte)this.stream.ReadByte();
+                    byte redIdx = (byte)this.stream.ReadByte();
+
+                    int bufferIdx = uncompressedPixels * 3;
+                    for (; uncompressedPixels < max; uncompressedPixels++)
+                    {
+                        buffer[bufferIdx++] = blueIdx;
+                        buffer[bufferIdx++] = greenIdx;
+                        buffer[bufferIdx++] = redIdx;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Keeps track of skipped / undefined pixels, when the EndOfBitmap command occurs.
         /// </summary>
         /// <param name="count">The already processed pixel count.</param>
         /// <param name="w">The width of the image.</param>
@@ -576,7 +744,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <summary>
         /// Keeps track of undefined / skipped pixels, when the EndOfLine command occurs.
         /// </summary>
-        /// <param name="count">The already processed pixel count.</param>
+        /// <param name="count">The already uncompressed pixel count.</param>
         /// <param name="w">The width of image.</param>
         /// <param name="undefinedPixels">The undefined pixels.</param>
         /// <param name="rowsWithUndefinedPixels">The rows with undefined pixels.</param>
@@ -1167,8 +1335,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         /// <summary>
         /// Reads the <see cref="BmpFileHeader"/> from the stream.
         /// </summary>
-        /// <returns>The color map size in bytes, if it could be determined by the file header. Otherwise -1.</returns>
-        private int ReadFileHeader()
+        private void ReadFileHeader()
         {
 #if NETCOREAPP2_1
             Span<byte> buffer = stackalloc byte[BmpFileHeader.Size];
@@ -1181,11 +1348,14 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             switch (fileTypeMarker)
             {
                 case BmpConstants.TypeMarkers.Bitmap:
+                    this.fileMarkerType = BmpFileMarkerType.Bitmap;
                     this.fileHeader = BmpFileHeader.Parse(buffer);
                     break;
                 case BmpConstants.TypeMarkers.BitmapArray:
-                    // The Array file header is followed by the bitmap file header of the first image.
-                    var arrayHeader = BmpArrayFileHeader.Parse(buffer);
+                    this.fileMarkerType = BmpFileMarkerType.BitmapArray;
+
+                    // Because we only decode the first bitmap in the array, the array header will be ignored.
+                    // The bitmap file header of the first image follows the array header.
                     this.stream.Read(buffer, 0, BmpFileHeader.Size);
                     this.fileHeader = BmpFileHeader.Parse(buffer);
                     if (this.fileHeader.Type != BmpConstants.TypeMarkers.Bitmap)
@@ -1193,20 +1363,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                         BmpThrowHelper.ThrowNotSupportedException($"Unsupported bitmap file inside a BitmapArray file. File header bitmap type marker '{this.fileHeader.Type}'.");
                     }
 
-                    if (arrayHeader.OffsetToNext != 0)
-                    {
-                        int colorMapSizeBytes = arrayHeader.OffsetToNext - arrayHeader.Size;
-                        return colorMapSizeBytes;
-                    }
-
                     break;
 
                 default:
                     BmpThrowHelper.ThrowNotSupportedException($"ImageSharp does not support this BMP file. File header bitmap type marker '{fileTypeMarker}'.");
                     break;
             }
-
-            return -1;
         }
 
         /// <summary>
@@ -1218,7 +1380,7 @@ namespace SixLabors.ImageSharp.Formats.Bmp
         {
             this.stream = stream;
 
-            int colorMapSizeBytes = this.ReadFileHeader();
+            this.ReadFileHeader();
             this.ReadInfoHeader();
 
             // see http://www.drdobbs.com/architecture-and-design/the-bmp-file-format-part-1/184409517
@@ -1234,23 +1396,34 @@ namespace SixLabors.ImageSharp.Formats.Bmp
             }
 
             int bytesPerColorMapEntry = 4;
-
+            int colorMapSizeBytes = -1;
             if (this.infoHeader.ClrUsed == 0)
             {
                 if (this.infoHeader.BitsPerPixel == 1
                     || this.infoHeader.BitsPerPixel == 4
                     || this.infoHeader.BitsPerPixel == 8)
                 {
-                    if (colorMapSizeBytes == -1)
+                    switch (this.fileMarkerType)
                     {
-                        colorMapSizeBytes = this.fileHeader.Offset - BmpFileHeader.Size - this.infoHeader.HeaderSize;
-                    }
+                        case BmpFileMarkerType.Bitmap:
+                            colorMapSizeBytes = this.fileHeader.Offset - BmpFileHeader.Size - this.infoHeader.HeaderSize;
+                            int colorCountForBitDepth = ImageMaths.GetColorCountForBitDepth(this.infoHeader.BitsPerPixel);
+                            bytesPerColorMapEntry = colorMapSizeBytes / colorCountForBitDepth;
 
-                    int colorCountForBitDepth = ImageMaths.GetColorCountForBitDepth(this.infoHeader.BitsPerPixel);
-                    bytesPerColorMapEntry = colorMapSizeBytes / colorCountForBitDepth;
+                            // Edge case for less-than-full-sized palette: bytesPerColorMapEntry should be at least 3.
+                            bytesPerColorMapEntry = Math.Max(bytesPerColorMapEntry, 3);
 
-                    // Edge case for less-than-full-sized palette: bytesPerColorMapEntry should be at least 3.
-                    bytesPerColorMapEntry = Math.Max(bytesPerColorMapEntry, 3);
+                            break;
+                        case BmpFileMarkerType.BitmapArray:
+                        case BmpFileMarkerType.ColorIcon:
+                        case BmpFileMarkerType.ColorPointer:
+                        case BmpFileMarkerType.Icon:
+                        case BmpFileMarkerType.Pointer:
+                            // OS/2 bitmaps always have 3 colors per color palette entry.
+                            bytesPerColorMapEntry = 3;
+                            colorMapSizeBytes = ImageMaths.GetColorCountForBitDepth(this.infoHeader.BitsPerPixel) * bytesPerColorMapEntry;
+                            break;
+                    }
                 }
             }
             else
diff --git a/src/ImageSharp/Formats/Bmp/BmpFileMarkerType.cs b/src/ImageSharp/Formats/Bmp/BmpFileMarkerType.cs
new file mode 100644
index 0000000000..4abcaa3a08
--- /dev/null
+++ b/src/ImageSharp/Formats/Bmp/BmpFileMarkerType.cs
@@ -0,0 +1,41 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Formats.Bmp
+{
+    /// <summary>
+    /// Indicates which bitmap file marker was read.
+    /// </summary>
+    public enum BmpFileMarkerType
+    {
+        /// <summary>
+        /// Single-image BMP file that may have been created under Windows or OS/2.
+        /// </summary>
+        Bitmap,
+
+        /// <summary>
+        /// OS/2 Bitmap Array.
+        /// </summary>
+        BitmapArray,
+
+        /// <summary>
+        /// OS/2 Color Icon.
+        /// </summary>
+        ColorIcon,
+
+        /// <summary>
+        /// OS/2 Color Pointer.
+        /// </summary>
+        ColorPointer,
+
+        /// <summary>
+        /// OS/2 Icon.
+        /// </summary>
+        Icon,
+
+        /// <summary>
+        /// OS/2 Pointer.
+        /// </summary>
+        Pointer
+    }
+}
diff --git a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
index ca90020d85..4d7f781001 100644
--- a/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpInfoHeader.cs
@@ -388,8 +388,12 @@ namespace SixLabors.ImageSharp.Formats.Bmp
                 case 2:
                     infoHeader.Compression = BmpCompression.RLE4;
                     break;
+                case 4:
+                    infoHeader.Compression = BmpCompression.RLE24;
+                    break;
                 default:
-                    BmpThrowHelper.ThrowImageFormatException($"Compression type is not supported. ImageSharp only supports uncompressed, RLE4 and RLE8.");
+                    // Compression type 3 (1DHuffman) is not supported.
+                    BmpThrowHelper.ThrowImageFormatException("Compression type is not supported. ImageSharp only supports uncompressed, RLE4, RLE8 and RLE24.");
                     break;
             }
 
diff --git a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
index a95703609b..dadce92d13 100644
--- a/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Bmp/BmpDecoderTests.cs
@@ -228,6 +228,22 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
             }
         }
 
+        [Theory]
+        [WithFile(RLE24, PixelTypes.Rgba32)]
+        [WithFile(RLE24Cut, PixelTypes.Rgba32)]
+        [WithFile(RLE24Delta, PixelTypes.Rgba32)]
+        public void BmpDecoder_CanDecode_RunLengthEncoded_24Bit<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(new BmpDecoder() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black }))
+            {
+                image.DebugSave(provider);
+
+                // TODO: Neither System.Drawing nor MagickReferenceDecoder decode this file.
+                // image.CompareToOriginal(provider);
+            }
+        }
+
         [Theory]
         [WithFile(RgbaAlphaBitfields, PixelTypes.Rgba32)]
         public void BmpDecoder_CanDecodeAlphaBitfields<TPixel>(TestImageProvider<TPixel> provider)
@@ -521,6 +537,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Bmp
         }
 
         [Theory]
+        [WithFile(Os2BitmapArray, PixelTypes.Rgba32)]
         [WithFile(Os2BitmapArray9s, PixelTypes.Rgba32)]
         [WithFile(Os2BitmapArrayDiamond, PixelTypes.Rgba32)]
         [WithFile(Os2BitmapArraySkater, PixelTypes.Rgba32)]
diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index 3c732c32d3..754ce20ca9 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -231,6 +231,9 @@ namespace SixLabors.ImageSharp.Tests
             public const string NegHeight = "Bmp/neg_height.bmp";
             public const string CoreHeader = "Bmp/BitmapCoreHeaderQR.bmp";
             public const string V5Header = "Bmp/BITMAPV5HEADER.bmp";
+            public const string RLE24 = "Bmp/rgb24rle24.bmp";
+            public const string RLE24Cut = "Bmp/rle24rlecut.bmp";
+            public const string RLE24Delta = "Bmp/rle24rlecut.bmp";
             public const string RLE8 = "Bmp/RunLengthEncoded.bmp";
             public const string RLE8Cut = "Bmp/pal8rlecut.bmp";
             public const string RLE8Delta = "Bmp/pal8rletrns.bmp";
@@ -262,6 +265,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit8Palette4 = "Bmp/pal8-0.bmp";
             public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
             public const string Os2v2 = "Bmp/pal8os2v2.bmp";
+            public const string Os2BitmapArray = "Bmp/ba-bm.bmp";
             public const string Os2BitmapArray9s = "Bmp/9S.BMP";
             public const string Os2BitmapArrayDiamond = "Bmp/DIAMOND.BMP";
             public const string Os2BitmapArrayMarble = "Bmp/GMARBLE.BMP";
diff --git a/tests/Images/Input/Bmp/ba-bm.bmp b/tests/Images/Input/Bmp/ba-bm.bmp
new file mode 100644
index 0000000000..a787229ac2
--- /dev/null
+++ b/tests/Images/Input/Bmp/ba-bm.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5ec70510334952d3fbeae51a9a49d4e50e5afc292a1f9232970a7cf22b1a18fc
+size 9000
diff --git a/tests/Images/Input/Bmp/rgb24rle24.bmp b/tests/Images/Input/Bmp/rgb24rle24.bmp
new file mode 100644
index 0000000000..0e0731dd54
--- /dev/null
+++ b/tests/Images/Input/Bmp/rgb24rle24.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:351d358824671a79dc63147a78fc555d46cbee357661674e80c898e133e0b5c5
+size 21432
diff --git a/tests/Images/Input/Bmp/rle24rlecut.bmp b/tests/Images/Input/Bmp/rle24rlecut.bmp
new file mode 100644
index 0000000000..137d38647a
--- /dev/null
+++ b/tests/Images/Input/Bmp/rle24rlecut.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:15b84ee3e41934653939197267758e6719da93d017200a7b9e61820b368af04c
+size 16748
diff --git a/tests/Images/Input/Bmp/rle24rletrns.bmp b/tests/Images/Input/Bmp/rle24rletrns.bmp
new file mode 100644
index 0000000000..bc5dc14a96
--- /dev/null
+++ b/tests/Images/Input/Bmp/rle24rletrns.bmp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:37caf0742ebc94e4ff73b822052091db543559fa96352b83a3e5f5545999c5f7
+size 20036

From 96c3bbff79937125969ec4e69079923f64358613 Mon Sep 17 00:00:00 2001
From: Anton Firsov <antonfir@gmail.com>
Date: Mon, 1 Jul 2019 08:31:52 +0200
Subject: [PATCH 223/223] Introduce non-generic ImageFrameCollection (#941)

* temporarily disable target frameworks

* drop DelegateProcessor

* drop IImageProcessingContext<TPixel>

* drop NamedColors<T>

* drop ColorBuilder<T>

* drop the *Base postfix for clean class hierarchies

* adding basic skeletons

* non-generic ImageFrameCollection API definition

* non-generic ImageFrameCollection tests

* cleanup + docs + more tests

* implement ImageFrameCollection methods

* tests for generic PixelOperations.To<TDest>()

* experimental implementation

* fix .ttinclude

* generate generic From<TSourcePixel>(...)

* fix RgbaVector <--> BT709 Gray pixel conversion

* Gray8 and Gray16 using ConvertFromRgbaScaledVector4() by default

* fixed all conversion tests

* ConstructGif_FromDifferentPixelTypes

* fix xmldoc and other StyelCop findings

* re-enable all target frameworks

* fix NonGenericAddFrame() and NonGenericInsertFrame()

* fix remaining bugs
---
 .gitattributes                                |   2 +-
 src/ImageSharp/Common/Helpers/ImageMaths.cs   |  13 +-
 .../Decoder/JpegImagePostProcessor.cs         |   4 +-
 src/ImageSharp/Image.cs                       |  12 +-
 src/ImageSharp/ImageFrame.LoadPixelData.cs    |  10 +-
 src/ImageSharp/ImageFrame.cs                  |  91 +++++
 src/ImageSharp/ImageFrameCollection.cs        | 252 ++++--------
 .../ImageFrameCollection{TPixel}.cs           | 358 ++++++++++++++++++
 src/ImageSharp/ImageFrame{TPixel}.cs          |  84 ++--
 src/ImageSharp/ImageSharp.csproj              |  10 +
 src/ImageSharp/Image{TPixel}.cs               |  27 +-
 .../Argb32.PixelOperations.Generated.cs       |  12 +-
 .../Argb32.PixelOperations.Generated.tt       |   2 +-
 .../Bgr24.PixelOperations.Generated.cs        |  12 +-
 .../Bgr24.PixelOperations.Generated.tt        |   2 +-
 .../Bgra32.PixelOperations.Generated.cs       |  12 +-
 .../Bgra32.PixelOperations.Generated.tt       |   2 +-
 .../Gray16.PixelOperations.Generated.cs       |  12 +-
 .../Gray16.PixelOperations.Generated.tt       |   2 +-
 .../Gray8.PixelOperations.Generated.cs        |  12 +-
 .../Gray8.PixelOperations.Generated.tt        |   2 +-
 .../Rgb24.PixelOperations.Generated.cs        |  12 +-
 .../Rgb24.PixelOperations.Generated.tt        |   2 +-
 .../Rgb48.PixelOperations.Generated.cs        |  12 +-
 .../Rgb48.PixelOperations.Generated.tt        |   2 +-
 .../Rgba32.PixelOperations.Generated.cs       |  12 +-
 .../Rgba32.PixelOperations.Generated.tt       |   2 +-
 .../Rgba64.PixelOperations.Generated.cs       |  12 +-
 .../Rgba64.PixelOperations.Generated.tt       |   2 +-
 .../Generated/_Common.ttinclude               |  17 +-
 .../PixelImplementations/Gray16.cs            |  16 +-
 .../PixelImplementations/Gray8.cs             |  14 +-
 .../RgbaVector.PixelOperations.cs             |  35 +-
 .../PixelFormats/PixelOperations{TPixel}.cs   |  91 +++--
 .../AffineTransformProcessor{TPixel}.cs       |   2 +-
 .../Transforms/CropProcessor{TPixel}.cs       |   7 +-
 .../ProjectiveTransformProcessor{TPixel}.cs   |   4 +-
 .../Resize/ResizeProcessor{TPixel}.cs         |   7 +-
 .../ImageFrameCollectionTests.Generic.cs      | 346 +++++++++++++++++
 .../ImageFrameCollectionTests.NonGeneric.cs   | 325 ++++++++++++++++
 .../Image/ImageFrameCollectionTests.cs        |  29 ++
 .../Image/ImageFramesCollectionTests.cs       | 331 ----------------
 .../ImageSharp.Tests/ImageSharp.Tests.csproj  |   7 +
 ...ConverterTests.ReferenceImplementations.cs | 115 ++++++
 .../PixelFormats/PixelConverterTests.cs       |  38 +-
 ...OperationsTests.Bgra5551OperationsTests.cs |  20 +
 ...elOperationsTests.Gray16OperationsTests.cs |  87 +----
 ...xelOperationsTests.Gray8OperationsTests.cs |  87 +----
 ...xelOperationsTests.Rgb24OperationsTests.cs |   2 +-
 .../PixelOperations/PixelOperationsTests.cs   | 131 ++++++-
 50 files changed, 1824 insertions(+), 876 deletions(-)
 create mode 100644 src/ImageSharp/ImageFrame.cs
 create mode 100644 src/ImageSharp/ImageFrameCollection{TPixel}.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.Generic.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.NonGeneric.cs
 create mode 100644 tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.cs
 delete mode 100644 tests/ImageSharp.Tests/Image/ImageFramesCollectionTests.cs
 create mode 100644 tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.ReferenceImplementations.cs
 create mode 100644 tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgra5551OperationsTests.cs

diff --git a/.gitattributes b/.gitattributes
index 704a6aa436..38abe0d4a4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -45,7 +45,7 @@
 *.svg               text        eol=lf
 *.targets           text        eol=lf
 *.tt                text        eol=lf
-*.ttinclude         text        eol=lf
+*.ttinclude         text        eol=crlf
 *.txt               text        eol=lf
 *.vb                text        eol=lf
 *.yml               text        eol=lf
diff --git a/src/ImageSharp/Common/Helpers/ImageMaths.cs b/src/ImageSharp/Common/Helpers/ImageMaths.cs
index 64bcb11c9f..7460c9cac1 100644
--- a/src/ImageSharp/Common/Helpers/ImageMaths.cs
+++ b/src/ImageSharp/Common/Helpers/ImageMaths.cs
@@ -36,6 +36,17 @@ namespace SixLabors.ImageSharp
         public static ushort Get16BitBT709Luminance(ushort r, ushort g, ushort b) =>
             (ushort)((r * .2126F) + (g * .7152F) + (b * .0722F));
 
+        /// <summary>
+        /// Gets the luminance from the rgb components using the formula as specified by ITU-R Recommendation BT.709.
+        /// </summary>
+        /// <param name="r">The red component.</param>
+        /// <param name="g">The green component.</param>
+        /// <param name="b">The blue component.</param>
+        /// <returns>The <see cref="ushort"/>.</returns>
+        [MethodImpl(InliningOptions.ShortMethod)]
+        public static ushort Get16BitBT709Luminance(float r, float g, float b) =>
+            (ushort)((r * .2126F) + (g * .7152F) + (b * .0722F));
+
         /// <summary>
         /// Scales a value from a 16 bit <see cref="ushort"/> to it's 8 bit <see cref="byte"/> equivalent.
         /// </summary>
@@ -379,4 +390,4 @@ namespace SixLabors.ImageSharp
             return GetBoundingRectangle(topLeft, bottomRight);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
index 2c81908843..f3f2952b1d 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegImagePostProcessor.cs
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
     /// (4) Packing <see cref="Image{TPixel}"/> pixels from the <see cref="Vector4"/> buffer. <br/>
     /// These operations are executed in <see cref="NumberOfPostProcessorSteps"/> steps.
     /// <see cref="PixelRowsPerStep"/> image rows are converted in one step,
-    /// which means that size of the allocated memory is limited (does not depend on <see cref="ImageFrame{TPixel}.Height"/>).
+    /// which means that size of the allocated memory is limited (does not depend on <see cref="ImageFrame.Height"/>).
     /// </summary>
     internal class JpegImagePostProcessor : IDisposable
     {
@@ -177,4 +177,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Image.cs b/src/ImageSharp/Image.cs
index 3f3d6a62f7..86fef715d1 100644
--- a/src/ImageSharp/Image.cs
+++ b/src/ImageSharp/Image.cs
@@ -53,6 +53,11 @@ namespace SixLabors.ImageSharp
         /// </summary>
         protected Configuration Configuration { get; }
 
+        /// <summary>
+        /// Gets the <see cref="ImageFrameCollection"/> implementing the public <see cref="Frames"/> property.
+        /// </summary>
+        protected abstract ImageFrameCollection NonGenericFrameCollection { get; }
+
         /// <inheritdoc/>
         public PixelTypeInfo PixelType { get; }
 
@@ -65,6 +70,11 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         public ImageMetadata Metadata { get; }
 
+        /// <summary>
+        /// Gets the frames of the image as (non-generic) <see cref="ImageFrameCollection"/>.
+        /// </summary>
+        public ImageFrameCollection Frames => this.NonGenericFrameCollection;
+
         /// <summary>
         /// Gets the pixel buffer.
         /// </summary>
@@ -137,4 +147,4 @@ namespace SixLabors.ImageSharp
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/ImageFrame.LoadPixelData.cs b/src/ImageSharp/ImageFrame.LoadPixelData.cs
index 33dbe31df7..9e90aeaf59 100644
--- a/src/ImageSharp/ImageFrame.LoadPixelData.cs
+++ b/src/ImageSharp/ImageFrame.LoadPixelData.cs
@@ -9,9 +9,9 @@ using SixLabors.ImageSharp.PixelFormats;
 namespace SixLabors.ImageSharp
 {
     /// <content>
-    /// Adds static methods allowing the creation of new image from raw pixel data.
+    /// Contains methods for loading raw pixel data.
     /// </content>
-    internal static class ImageFrame
+    public partial class ImageFrame
     {
         /// <summary>
         /// Create a new instance of the <see cref="Image{TPixel}"/> class from the given byte array in <typeparamref name="TPixel"/> format.
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the final image.</param>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
-        public static ImageFrame<TPixel> LoadPixelData<TPixel>(Configuration configuration, ReadOnlySpan<byte> data, int width, int height)
+        internal static ImageFrame<TPixel> LoadPixelData<TPixel>(Configuration configuration, ReadOnlySpan<byte> data, int width, int height)
             where TPixel : struct, IPixel<TPixel>
             => LoadPixelData(configuration, MemoryMarshal.Cast<byte, TPixel>(data), width, height);
 
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the final image.</param>
         /// <typeparam name="TPixel">The pixel format.</typeparam>
         /// <returns>A new <see cref="Image{TPixel}"/>.</returns>
-        public static ImageFrame<TPixel> LoadPixelData<TPixel>(Configuration configuration, ReadOnlySpan<TPixel> data, int width, int height)
+        internal static ImageFrame<TPixel> LoadPixelData<TPixel>(Configuration configuration, ReadOnlySpan<TPixel> data, int width, int height)
             where TPixel : struct, IPixel<TPixel>
         {
             int count = width * height;
@@ -48,4 +48,4 @@ namespace SixLabors.ImageSharp
             return image;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/ImageFrame.cs b/src/ImageSharp/ImageFrame.cs
new file mode 100644
index 0000000000..f3fe1ed8d4
--- /dev/null
+++ b/src/ImageSharp/ImageFrame.cs
@@ -0,0 +1,91 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.Metadata;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Memory;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// Represents a pixel-agnostic image frame containing all pixel data and <see cref="ImageFrameMetadata"/>.
+    /// In case of animated formats like gif, it contains the single frame in a animation.
+    /// In all other cases it is the only frame of the image.
+    /// </summary>
+    public abstract partial class ImageFrame : IDisposable
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ImageFrame"/> class.
+        /// </summary>
+        /// <param name="configuration">The <see cref="Configuration"/>.</param>
+        /// <param name="width">The width.</param>
+        /// <param name="height">The height.</param>
+        /// <param name="metadata">The <see cref="ImageFrameMetadata"/>.</param>
+        protected ImageFrame(Configuration configuration, int width, int height, ImageFrameMetadata metadata)
+        {
+            Guard.NotNull(configuration, nameof(configuration));
+            Guard.NotNull(metadata, nameof(metadata));
+
+            this.Configuration = configuration;
+            this.MemoryAllocator = configuration.MemoryAllocator;
+            this.Width = width;
+            this.Height = height;
+            this.Metadata = metadata;
+        }
+
+        /// <summary>
+        /// Gets the <see cref="MemoryAllocator" /> to use for buffer allocations.
+        /// </summary>
+        public MemoryAllocator MemoryAllocator { get; }
+
+        /// <summary>
+        /// Gets the <see cref="Configuration"/> instance associated with this <see cref="ImageFrame{TPixel}"/>.
+        /// </summary>
+        internal Configuration Configuration { get; }
+
+        /// <summary>
+        /// Gets the width.
+        /// </summary>
+        public int Width { get; private set; }
+
+        /// <summary>
+        /// Gets the height.
+        /// </summary>
+        public int Height { get; private set; }
+
+        /// <summary>
+        /// Gets the metadata of the frame.
+        /// </summary>
+        public ImageFrameMetadata Metadata { get; }
+
+        /// <summary>
+        /// Gets the size of the frame.
+        /// </summary>
+        /// <returns>The <see cref="Size"/></returns>
+        public Size Size() => new Size(this.Width, this.Height);
+
+        /// <summary>
+        /// Gets the bounds of the frame.
+        /// </summary>
+        /// <returns>The <see cref="Rectangle"/></returns>
+        public Rectangle Bounds() => new Rectangle(0, 0, this.Width, this.Height);
+
+        /// <inheritdoc />
+        public abstract void Dispose();
+
+        internal abstract void CopyPixelsTo<TDestinationPixel>(Span<TDestinationPixel> destination)
+            where TDestinationPixel : struct, IPixel<TDestinationPixel>;
+
+        /// <summary>
+        /// Updates the size of the image frame.
+        /// </summary>
+        internal void UpdateSize(Size size)
+        {
+            this.Width = size.Width;
+            this.Height = size.Height;
+        }
+    }
+}
diff --git a/src/ImageSharp/ImageFrameCollection.cs b/src/ImageSharp/ImageFrameCollection.cs
index 7e516434cb..c5bd02c79d 100644
--- a/src/ImageSharp/ImageFrameCollection.cs
+++ b/src/ImageSharp/ImageFrameCollection.cs
@@ -4,149 +4,69 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Encapsulates a collection of <see cref="ImageFrame{T}"/> instances that make up an <see cref="Image{T}"/>.
+    /// Encapsulates a pixel-agnostic collection of <see cref="ImageFrame"/> instances
+    /// that make up an <see cref="Image"/>.
     /// </summary>
-    /// <typeparam name="TPixel">The type of the pixel.</typeparam>
-    public sealed class ImageFrameCollection<TPixel> : IEnumerable<ImageFrame<TPixel>>
-        where TPixel : struct, IPixel<TPixel>
+    public abstract class ImageFrameCollection : IEnumerable<ImageFrame>
     {
-        private readonly IList<ImageFrame<TPixel>> frames = new List<ImageFrame<TPixel>>();
-        private readonly Image<TPixel> parent;
-
-        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, TPixel backgroundColor)
-        {
-            this.parent = parent ?? throw new ArgumentNullException(nameof(parent));
-
-            // Frames are already cloned within the caller
-            this.frames.Add(new ImageFrame<TPixel>(parent.GetConfiguration(), width, height, backgroundColor));
-        }
-
-        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, MemorySource<TPixel> memorySource)
-        {
-            this.parent = parent ?? throw new ArgumentNullException(nameof(parent));
-
-            // Frames are already cloned within the caller
-            this.frames.Add(new ImageFrame<TPixel>(parent.GetConfiguration(), width, height, memorySource));
-        }
-
-        internal ImageFrameCollection(Image<TPixel> parent, IEnumerable<ImageFrame<TPixel>> frames)
-        {
-            Guard.NotNull(parent, nameof(parent));
-            Guard.NotNull(frames, nameof(frames));
-
-            this.parent = parent;
-
-            // Frames are already cloned by the caller
-            foreach (ImageFrame<TPixel> f in frames)
-            {
-                this.ValidateFrame(f);
-                this.frames.Add(f);
-            }
-
-            // Ensure at least 1 frame was added to the frames collection
-            if (this.frames.Count == 0)
-            {
-                throw new ArgumentException("Must not be empty.", nameof(frames));
-            }
-        }
-
         /// <summary>
         /// Gets the number of frames.
         /// </summary>
-        public int Count => this.frames.Count;
+        public abstract int Count { get; }
 
         /// <summary>
         /// Gets the root frame.
         /// </summary>
-        public ImageFrame<TPixel> RootFrame => this.frames.Count > 0 ? this.frames[0] : null;
+        public ImageFrame RootFrame => this.NonGenericRootFrame;
+
+        /// <summary>
+        /// Gets the root frame. (Implements <see cref="RootFrame"/>.)
+        /// </summary>
+        protected abstract ImageFrame NonGenericRootFrame { get; }
 
         /// <summary>
-        /// Gets the <see cref="ImageFrame{TPixel}"/> at the specified index.
+        /// Gets the <see cref="ImageFrame"/> at the specified index.
         /// </summary>
         /// <value>
-        /// The <see cref="ImageFrame{TPixel}"/>.
+        /// The <see cref="ImageFrame"/>.
         /// </value>
         /// <param name="index">The index.</param>
-        /// <returns>The <see cref="ImageFrame{TPixel}"/> at the specified index.</returns>
-        public ImageFrame<TPixel> this[int index] => this.frames[index];
+        /// <returns>The <see cref="ImageFrame"/> at the specified index.</returns>
+        public ImageFrame this[int index] => this.NonGenericGetFrame(index);
 
         /// <summary>
-        /// Determines the index of a specific <paramref name="frame"/> in the <seealso cref="ImageFrameCollection{TPixel}"/>.
+        /// Determines the index of a specific <paramref name="frame"/> in the <seealso cref="ImageFrameCollection"/>.
         /// </summary>
-        /// <param name="frame">The <seealso cref="ImageFrame{TPixel}"/> to locate in the <seealso cref="ImageFrameCollection{TPixel}"/>.</param>
+        /// <param name="frame">The <seealso cref="ImageFrame"/> to locate in the <seealso cref="ImageFrameCollection"/>.</param>
         /// <returns>The index of item if found in the list; otherwise, -1.</returns>
-        public int IndexOf(ImageFrame<TPixel> frame) => this.frames.IndexOf(frame);
+        public abstract int IndexOf(ImageFrame frame);
 
         /// <summary>
-        /// Clones and inserts the <paramref name="source"/> into the <seealso cref="ImageFrameCollection{TPixel}"/> at the specified <paramref name="index"/>.
+        /// Clones and inserts the <paramref name="source"/> into the <seealso cref="ImageFrameCollection"/> at the specified <paramref name="index"/>.
         /// </summary>
         /// <param name="index">The zero-based index to insert the frame at.</param>
-        /// <param name="source">The <seealso cref="ImageFrame{TPixel}"/> to clone and insert into the <seealso cref="ImageFrameCollection{TPixel}"/>.</param>
+        /// <param name="source">The <seealso cref="ImageFrame"/> to clone and insert into the <seealso cref="ImageFrameCollection"/>.</param>
         /// <exception cref="ArgumentException">Frame must have the same dimensions as the image.</exception>
-        /// <returns>The cloned <see cref="ImageFrame{TPixel}"/>.</returns>
-        public ImageFrame<TPixel> InsertFrame(int index, ImageFrame<TPixel> source)
-        {
-            this.ValidateFrame(source);
-            ImageFrame<TPixel> clonedFrame = source.Clone(this.parent.GetConfiguration());
-            this.frames.Insert(index, clonedFrame);
-            return clonedFrame;
-        }
+        /// <returns>The cloned <see cref="ImageFrame"/>.</returns>
+        public ImageFrame InsertFrame(int index, ImageFrame source) => this.NonGenericInsertFrame(index, source);
 
         /// <summary>
         /// Clones the <paramref name="source"/> frame and appends the clone to the end of the collection.
         /// </summary>
         /// <param name="source">The raw pixel data to generate the <seealso cref="ImageFrame{TPixel}"/> from.</param>
         /// <returns>The cloned <see cref="ImageFrame{TPixel}"/>.</returns>
-        public ImageFrame<TPixel> AddFrame(ImageFrame<TPixel> source)
-        {
-            this.ValidateFrame(source);
-            ImageFrame<TPixel> clonedFrame = source.Clone(this.parent.GetConfiguration());
-            this.frames.Add(clonedFrame);
-            return clonedFrame;
-        }
-
-        /// <summary>
-        /// Creates a new frame from the pixel data with the same dimensions as the other frames and inserts the
-        /// new frame at the end of the collection.
-        /// </summary>
-        /// <param name="source">The raw pixel data to generate the <seealso cref="ImageFrame{TPixel}"/> from.</param>
-        /// <returns>The new <see cref="ImageFrame{TPixel}"/>.</returns>
-        public ImageFrame<TPixel> AddFrame(TPixel[] source)
-        {
-            Guard.NotNull(source, nameof(source));
-
-            var frame = ImageFrame.LoadPixelData(
-                this.parent.GetConfiguration(),
-                new ReadOnlySpan<TPixel>(source),
-                this.RootFrame.Width,
-                this.RootFrame.Height);
-            this.frames.Add(frame);
-            return frame;
-        }
+        public ImageFrame AddFrame(ImageFrame source) => this.NonGenericAddFrame(source);
 
         /// <summary>
         /// Removes the frame at the specified index and frees all freeable resources associated with it.
         /// </summary>
         /// <param name="index">The zero-based index of the frame to remove.</param>
         /// <exception cref="InvalidOperationException">Cannot remove last frame.</exception>
-        public void RemoveFrame(int index)
-        {
-            if (index == 0 && this.Count == 1)
-            {
-                throw new InvalidOperationException("Cannot remove last frame.");
-            }
-
-            ImageFrame<TPixel> frame = this.frames[index];
-            this.frames.RemoveAt(index);
-            frame.Dispose();
-        }
+        public abstract void RemoveFrame(int index);
 
         /// <summary>
         /// Determines whether the <seealso cref="ImageFrameCollection{TPixel}"/> contains the <paramref name="frame"/>.
@@ -155,24 +75,14 @@ namespace SixLabors.ImageSharp
         /// <returns>
         ///   <c>true</c> if the <seealso cref="ImageFrameCollection{TPixel}"/> contains the specified frame; otherwise, <c>false</c>.
         /// </returns>
-        public bool Contains(ImageFrame<TPixel> frame) => this.frames.Contains(frame);
+        public abstract bool Contains(ImageFrame frame);
 
         /// <summary>
         /// Moves an <seealso cref="ImageFrame{TPixel}"/> from <paramref name="sourceIndex"/> to <paramref name="destinationIndex"/>.
         /// </summary>
         /// <param name="sourceIndex">The zero-based index of the frame to move.</param>
         /// <param name="destinationIndex">The index to move the frame to.</param>
-        public void MoveFrame(int sourceIndex, int destinationIndex)
-        {
-            if (sourceIndex == destinationIndex)
-            {
-                return;
-            }
-
-            ImageFrame<TPixel> frameAtIndex = this.frames[sourceIndex];
-            this.frames.RemoveAt(sourceIndex);
-            this.frames.Insert(destinationIndex, frameAtIndex);
-        }
+        public abstract void MoveFrame(int sourceIndex, int destinationIndex);
 
         /// <summary>
         /// Removes the frame at the specified index and creates a new image with only the removed frame
@@ -181,19 +91,7 @@ namespace SixLabors.ImageSharp
         /// <param name="index">The zero-based index of the frame to export.</param>
         /// <exception cref="InvalidOperationException">Cannot remove last frame.</exception>
         /// <returns>The new <see cref="Image{TPixel}"/> with the specified frame.</returns>
-        public Image<TPixel> ExportFrame(int index)
-        {
-            ImageFrame<TPixel> frame = this[index];
-
-            if (this.Count == 1 && this.frames.Contains(frame))
-            {
-                throw new InvalidOperationException("Cannot remove last frame.");
-            }
-
-            this.frames.Remove(frame);
-
-            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { frame });
-        }
+        public Image ExportFrame(int index) => this.NonGenericExportFrame(index);
 
         /// <summary>
         /// Creates an <see cref="Image{T}"/> with only the frame at the specified index
@@ -201,12 +99,7 @@ namespace SixLabors.ImageSharp
         /// </summary>
         /// <param name="index">The zero-based index of the frame to clone.</param>
         /// <returns>The new <see cref="Image{TPixel}"/> with the specified frame.</returns>
-        public Image<TPixel> CloneFrame(int index)
-        {
-            ImageFrame<TPixel> frame = this[index];
-            ImageFrame<TPixel> clonedFrame = frame.Clone();
-            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { clonedFrame });
-        }
+        public Image CloneFrame(int index) => this.NonGenericCloneFrame(index);
 
         /// <summary>
         /// Creates a new <seealso cref="ImageFrame{TPixel}" /> and appends it to the end of the collection.
@@ -214,7 +107,7 @@ namespace SixLabors.ImageSharp
         /// <returns>
         /// The new <see cref="ImageFrame{TPixel}" />.
         /// </returns>
-        public ImageFrame<TPixel> CreateFrame() => this.CreateFrame(default);
+        public ImageFrame CreateFrame() => this.NonGenericCreateFrame();
 
         /// <summary>
         /// Creates a new <seealso cref="ImageFrame{TPixel}" /> and appends it to the end of the collection.
@@ -223,44 +116,67 @@ namespace SixLabors.ImageSharp
         /// <returns>
         /// The new <see cref="ImageFrame{TPixel}" />.
         /// </returns>
-        public ImageFrame<TPixel> CreateFrame(TPixel backgroundColor)
-        {
-            var frame = new ImageFrame<TPixel>(
-                this.parent.GetConfiguration(),
-                this.RootFrame.Width,
-                this.RootFrame.Height,
-                backgroundColor);
-            this.frames.Add(frame);
-            return frame;
-        }
+        public ImageFrame CreateFrame(Color backgroundColor) => this.NonGenericCreateFrame(backgroundColor);
 
-        /// <inheritdoc/>
-        IEnumerator<ImageFrame<TPixel>> IEnumerable<ImageFrame<TPixel>>.GetEnumerator() => this.frames.GetEnumerator();
+        /// <inheritdoc />
+        public IEnumerator<ImageFrame> GetEnumerator() => this.NonGenericGetEnumerator();
 
         /// <inheritdoc/>
-        IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable)this.frames).GetEnumerator();
+        IEnumerator IEnumerable.GetEnumerator() => this.NonGenericGetEnumerator();
 
-        private void ValidateFrame(ImageFrame<TPixel> frame)
-        {
-            Guard.NotNull(frame, nameof(frame));
+        /// <summary>
+        /// Implements <see cref="GetEnumerator"/>.
+        /// </summary>
+        /// <returns>The enumerator.</returns>
+        protected abstract IEnumerator<ImageFrame> NonGenericGetEnumerator();
+
+        /// <summary>
+        /// Implements the getter of the indexer.
+        /// </summary>
+        /// <param name="index">The index.</param>
+        /// <returns>The frame.</returns>
+        protected abstract ImageFrame NonGenericGetFrame(int index);
+
+        /// <summary>
+        /// Implements <see cref="InsertFrame"/>.
+        /// </summary>
+        /// <param name="index">The index.</param>
+        /// <param name="source">The frame.</param>
+        /// <returns>The new frame.</returns>
+        protected abstract ImageFrame NonGenericInsertFrame(int index, ImageFrame source);
+
+        /// <summary>
+        /// Implements <see cref="AddFrame"/>.
+        /// </summary>
+        /// <param name="source">The frame.</param>
+        /// <returns>The new frame.</returns>
+        protected abstract ImageFrame NonGenericAddFrame(ImageFrame source);
+
+        /// <summary>
+        /// Implements <see cref="ExportFrame"/>.
+        /// </summary>
+        /// <param name="index">The index.</param>
+        /// <returns>The new image.</returns>
+        protected abstract Image NonGenericExportFrame(int index);
 
-            if (this.Count != 0)
-            {
-                if (this.RootFrame.Width != frame.Width || this.RootFrame.Height != frame.Height)
-                {
-                    throw new ArgumentException("Frame must have the same dimensions as the image.", nameof(frame));
-                }
-            }
-        }
+        /// <summary>
+        /// Implements <see cref="CloneFrame"/>.
+        /// </summary>
+        /// <param name="index">The index.</param>
+        /// <returns>The new image.</returns>
+        protected abstract Image NonGenericCloneFrame(int index);
 
-        internal void Dispose()
-        {
-            foreach (ImageFrame<TPixel> f in this.frames)
-            {
-                f.Dispose();
-            }
+        /// <summary>
+        /// Implements <see cref="CreateFrame()"/>.
+        /// </summary>
+        /// <returns>The new frame.</returns>
+        protected abstract ImageFrame NonGenericCreateFrame();
 
-            this.frames.Clear();
-        }
+        /// <summary>
+        /// Implements <see cref="CreateFrame()"/>.
+        /// </summary>
+        /// <param name="backgroundColor">The background color.</param>
+        /// <returns>The new frame.</returns>
+        protected abstract ImageFrame NonGenericCreateFrame(Color backgroundColor);
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/ImageFrameCollection{TPixel}.cs b/src/ImageSharp/ImageFrameCollection{TPixel}.cs
new file mode 100644
index 0000000000..ffd7225bd4
--- /dev/null
+++ b/src/ImageSharp/ImageFrameCollection{TPixel}.cs
@@ -0,0 +1,358 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Memory;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp
+{
+    /// <summary>
+    /// Encapsulates a pixel-specific collection of <see cref="ImageFrame{T}"/> instances
+    /// that make up an <see cref="Image{T}"/>.
+    /// </summary>
+    /// <typeparam name="TPixel">The type of the pixel.</typeparam>
+    public sealed class ImageFrameCollection<TPixel> : ImageFrameCollection, IEnumerable<ImageFrame<TPixel>>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        private readonly IList<ImageFrame<TPixel>> frames = new List<ImageFrame<TPixel>>();
+        private readonly Image<TPixel> parent;
+
+        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, TPixel backgroundColor)
+        {
+            this.parent = parent ?? throw new ArgumentNullException(nameof(parent));
+
+            // Frames are already cloned within the caller
+            this.frames.Add(new ImageFrame<TPixel>(parent.GetConfiguration(), width, height, backgroundColor));
+        }
+
+        internal ImageFrameCollection(Image<TPixel> parent, int width, int height, MemorySource<TPixel> memorySource)
+        {
+            this.parent = parent ?? throw new ArgumentNullException(nameof(parent));
+
+            // Frames are already cloned within the caller
+            this.frames.Add(new ImageFrame<TPixel>(parent.GetConfiguration(), width, height, memorySource));
+        }
+
+        internal ImageFrameCollection(Image<TPixel> parent, IEnumerable<ImageFrame<TPixel>> frames)
+        {
+            Guard.NotNull(parent, nameof(parent));
+            Guard.NotNull(frames, nameof(frames));
+
+            this.parent = parent;
+
+            // Frames are already cloned by the caller
+            foreach (ImageFrame<TPixel> f in frames)
+            {
+                this.ValidateFrame(f);
+                this.frames.Add(f);
+            }
+
+            // Ensure at least 1 frame was added to the frames collection
+            if (this.frames.Count == 0)
+            {
+                throw new ArgumentException("Must not be empty.", nameof(frames));
+            }
+        }
+
+        /// <summary>
+        /// Gets the number of frames.
+        /// </summary>
+        public override int Count => this.frames.Count;
+
+        /// <summary>
+        /// Gets the root frame.
+        /// </summary>
+        public new ImageFrame<TPixel> RootFrame => this.frames.Count > 0 ? this.frames[0] : null;
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericRootFrame => this.RootFrame;
+
+        /// <summary>
+        /// Gets the <see cref="ImageFrame{TPixel}"/> at the specified index.
+        /// </summary>
+        /// <value>
+        /// The <see cref="ImageFrame{TPixel}"/>.
+        /// </value>
+        /// <param name="index">The index.</param>
+        /// <returns>The <see cref="ImageFrame{TPixel}"/> at the specified index.</returns>
+        public new ImageFrame<TPixel> this[int index] => this.frames[index];
+
+        /// <inheritdoc />
+        public override int IndexOf(ImageFrame frame)
+        {
+            return frame is ImageFrame<TPixel> specific ? this.IndexOf(specific) : -1;
+        }
+
+        /// <summary>
+        /// Determines the index of a specific <paramref name="frame"/> in the <seealso cref="ImageFrameCollection{TPixel}"/>.
+        /// </summary>
+        /// <param name="frame">The <seealso cref="ImageFrame{TPixel}"/> to locate in the <seealso cref="ImageFrameCollection{TPixel}"/>.</param>
+        /// <returns>The index of item if found in the list; otherwise, -1.</returns>
+        public int IndexOf(ImageFrame<TPixel> frame) => this.frames.IndexOf(frame);
+
+        /// <summary>
+        /// Clones and inserts the <paramref name="source"/> into the <seealso cref="ImageFrameCollection{TPixel}"/> at the specified <paramref name="index"/>.
+        /// </summary>
+        /// <param name="index">The zero-based index to insert the frame at.</param>
+        /// <param name="source">The <seealso cref="ImageFrame{TPixel}"/> to clone and insert into the <seealso cref="ImageFrameCollection{TPixel}"/>.</param>
+        /// <exception cref="ArgumentException">Frame must have the same dimensions as the image.</exception>
+        /// <returns>The cloned <see cref="ImageFrame{TPixel}"/>.</returns>
+        public ImageFrame<TPixel> InsertFrame(int index, ImageFrame<TPixel> source)
+        {
+            this.ValidateFrame(source);
+            ImageFrame<TPixel> clonedFrame = source.Clone(this.parent.GetConfiguration());
+            this.frames.Insert(index, clonedFrame);
+            return clonedFrame;
+        }
+
+        /// <summary>
+        /// Clones the <paramref name="source"/> frame and appends the clone to the end of the collection.
+        /// </summary>
+        /// <param name="source">The raw pixel data to generate the <seealso cref="ImageFrame{TPixel}"/> from.</param>
+        /// <returns>The cloned <see cref="ImageFrame{TPixel}"/>.</returns>
+        public ImageFrame<TPixel> AddFrame(ImageFrame<TPixel> source)
+        {
+            this.ValidateFrame(source);
+            ImageFrame<TPixel> clonedFrame = source.Clone(this.parent.GetConfiguration());
+            this.frames.Add(clonedFrame);
+            return clonedFrame;
+        }
+
+        /// <summary>
+        /// Creates a new frame from the pixel data with the same dimensions as the other frames and inserts the
+        /// new frame at the end of the collection.
+        /// </summary>
+        /// <param name="source">The raw pixel data to generate the <seealso cref="ImageFrame{TPixel}"/> from.</param>
+        /// <returns>The new <see cref="ImageFrame{TPixel}"/>.</returns>
+        public ImageFrame<TPixel> AddFrame(ReadOnlySpan<TPixel> source)
+        {
+            var frame = ImageFrame.LoadPixelData(
+                this.parent.GetConfiguration(),
+                source,
+                this.RootFrame.Width,
+                this.RootFrame.Height);
+            this.frames.Add(frame);
+            return frame;
+        }
+
+        /// <summary>
+        /// Creates a new frame from the pixel data with the same dimensions as the other frames and inserts the
+        /// new frame at the end of the collection.
+        /// </summary>
+        /// <param name="source">The raw pixel data to generate the <seealso cref="ImageFrame{TPixel}"/> from.</param>
+        /// <returns>The new <see cref="ImageFrame{TPixel}"/>.</returns>
+        public ImageFrame<TPixel> AddFrame(TPixel[] source)
+        {
+            Guard.NotNull(source, nameof(source));
+            return this.AddFrame(source.AsSpan());
+        }
+
+        /// <summary>
+        /// Removes the frame at the specified index and frees all freeable resources associated with it.
+        /// </summary>
+        /// <param name="index">The zero-based index of the frame to remove.</param>
+        /// <exception cref="InvalidOperationException">Cannot remove last frame.</exception>
+        public override void RemoveFrame(int index)
+        {
+            if (index == 0 && this.Count == 1)
+            {
+                throw new InvalidOperationException("Cannot remove last frame.");
+            }
+
+            ImageFrame<TPixel> frame = this.frames[index];
+            this.frames.RemoveAt(index);
+            frame.Dispose();
+        }
+
+        /// <inheritdoc />
+        public override bool Contains(ImageFrame frame) =>
+            frame is ImageFrame<TPixel> specific && this.Contains(specific);
+
+        /// <summary>
+        /// Determines whether the <seealso cref="ImageFrameCollection{TPixel}"/> contains the <paramref name="frame"/>.
+        /// </summary>
+        /// <param name="frame">The frame.</param>
+        /// <returns>
+        ///   <c>true</c> if the <seealso cref="ImageFrameCollection{TPixel}"/> contains the specified frame; otherwise, <c>false</c>.
+        /// </returns>
+        public bool Contains(ImageFrame<TPixel> frame) => this.frames.Contains(frame);
+
+        /// <summary>
+        /// Moves an <seealso cref="ImageFrame{TPixel}"/> from <paramref name="sourceIndex"/> to <paramref name="destinationIndex"/>.
+        /// </summary>
+        /// <param name="sourceIndex">The zero-based index of the frame to move.</param>
+        /// <param name="destinationIndex">The index to move the frame to.</param>
+        public override void MoveFrame(int sourceIndex, int destinationIndex)
+        {
+            if (sourceIndex == destinationIndex)
+            {
+                return;
+            }
+
+            ImageFrame<TPixel> frameAtIndex = this.frames[sourceIndex];
+            this.frames.RemoveAt(sourceIndex);
+            this.frames.Insert(destinationIndex, frameAtIndex);
+        }
+
+        /// <summary>
+        /// Removes the frame at the specified index and creates a new image with only the removed frame
+        /// with the same metadata as the original image.
+        /// </summary>
+        /// <param name="index">The zero-based index of the frame to export.</param>
+        /// <exception cref="InvalidOperationException">Cannot remove last frame.</exception>
+        /// <returns>The new <see cref="Image{TPixel}"/> with the specified frame.</returns>
+        public new Image<TPixel> ExportFrame(int index)
+        {
+            ImageFrame<TPixel> frame = this[index];
+
+            if (this.Count == 1 && this.frames.Contains(frame))
+            {
+                throw new InvalidOperationException("Cannot remove last frame.");
+            }
+
+            this.frames.Remove(frame);
+
+            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { frame });
+        }
+
+        /// <summary>
+        /// Creates an <see cref="Image{T}"/> with only the frame at the specified index
+        /// with the same metadata as the original image.
+        /// </summary>
+        /// <param name="index">The zero-based index of the frame to clone.</param>
+        /// <returns>The new <see cref="Image{TPixel}"/> with the specified frame.</returns>
+        public new Image<TPixel> CloneFrame(int index)
+        {
+            ImageFrame<TPixel> frame = this[index];
+            ImageFrame<TPixel> clonedFrame = frame.Clone();
+            return new Image<TPixel>(this.parent.GetConfiguration(), this.parent.Metadata.DeepClone(), new[] { clonedFrame });
+        }
+
+        /// <summary>
+        /// Creates a new <seealso cref="ImageFrame{TPixel}" /> and appends it to the end of the collection.
+        /// </summary>
+        /// <returns>
+        /// The new <see cref="ImageFrame{TPixel}" />.
+        /// </returns>
+        public new ImageFrame<TPixel> CreateFrame()
+        {
+            var frame = new ImageFrame<TPixel>(
+                this.parent.GetConfiguration(),
+                this.RootFrame.Width,
+                this.RootFrame.Height);
+            this.frames.Add(frame);
+            return frame;
+        }
+
+        /// <inheritdoc />
+        protected override IEnumerator<ImageFrame> NonGenericGetEnumerator() => this.frames.GetEnumerator();
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericGetFrame(int index) => this[index];
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericInsertFrame(int index, ImageFrame source)
+        {
+            Guard.NotNull(source, nameof(source));
+
+            if (source is ImageFrame<TPixel> compatibleSource)
+            {
+                return this.InsertFrame(index, compatibleSource);
+            }
+
+            ImageFrame<TPixel> result = this.CopyNonCompatibleFrame(source);
+            this.frames.Insert(index, result);
+            return result;
+        }
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericAddFrame(ImageFrame source)
+        {
+            Guard.NotNull(source, nameof(source));
+
+            if (source is ImageFrame<TPixel> compatibleSource)
+            {
+                return this.AddFrame(compatibleSource);
+            }
+
+            ImageFrame<TPixel> result = this.CopyNonCompatibleFrame(source);
+            this.frames.Add(result);
+            return result;
+        }
+
+        /// <inheritdoc />
+        protected override Image NonGenericExportFrame(int index) => this.ExportFrame(index);
+
+        /// <inheritdoc />
+        protected override Image NonGenericCloneFrame(int index) => this.CloneFrame(index);
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericCreateFrame(Color backgroundColor) =>
+            this.CreateFrame(backgroundColor.ToPixel<TPixel>());
+
+        /// <inheritdoc />
+        protected override ImageFrame NonGenericCreateFrame() => this.CreateFrame();
+
+        /// <summary>
+        /// Creates a new <seealso cref="ImageFrame{TPixel}" /> and appends it to the end of the collection.
+        /// </summary>
+        /// <param name="backgroundColor">The background color to initialize the pixels with.</param>
+        /// <returns>
+        /// The new <see cref="ImageFrame{TPixel}" />.
+        /// </returns>
+        public ImageFrame<TPixel> CreateFrame(TPixel backgroundColor)
+        {
+            var frame = new ImageFrame<TPixel>(
+                this.parent.GetConfiguration(),
+                this.RootFrame.Width,
+                this.RootFrame.Height,
+                backgroundColor);
+            this.frames.Add(frame);
+            return frame;
+        }
+
+        /// <inheritdoc/>
+        IEnumerator<ImageFrame<TPixel>> IEnumerable<ImageFrame<TPixel>>.GetEnumerator() => this.frames.GetEnumerator();
+
+        /// <inheritdoc/>
+        IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable)this.frames).GetEnumerator();
+
+        private void ValidateFrame(ImageFrame<TPixel> frame)
+        {
+            Guard.NotNull(frame, nameof(frame));
+
+            if (this.Count != 0)
+            {
+                if (this.RootFrame.Width != frame.Width || this.RootFrame.Height != frame.Height)
+                {
+                    throw new ArgumentException("Frame must have the same dimensions as the image.", nameof(frame));
+                }
+            }
+        }
+
+        internal void Dispose()
+        {
+            foreach (ImageFrame<TPixel> f in this.frames)
+            {
+                f.Dispose();
+            }
+
+            this.frames.Clear();
+        }
+
+        private ImageFrame<TPixel> CopyNonCompatibleFrame(ImageFrame source)
+        {
+            ImageFrame<TPixel> result = new ImageFrame<TPixel>(
+                this.parent.GetConfiguration(),
+                source.Size(),
+                source.Metadata.DeepClone());
+            source.CopyPixelsTo(result.PixelBuffer.Span);
+            return result;
+        }
+    }
+}
diff --git a/src/ImageSharp/ImageFrame{TPixel}.cs b/src/ImageSharp/ImageFrame{TPixel}.cs
index 4f0be59713..982f8d8f29 100644
--- a/src/ImageSharp/ImageFrame{TPixel}.cs
+++ b/src/ImageSharp/ImageFrame{TPixel}.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
@@ -15,10 +16,12 @@ using SixLabors.Primitives;
 namespace SixLabors.ImageSharp
 {
     /// <summary>
-    /// Represents a single frame in a animation.
+    /// Represents a pixel-specific image frame containing all pixel data and <see cref="ImageFrameMetadata"/>.
+    /// In case of animated formats like gif, it contains the single frame in a animation.
+    /// In all other cases it is the only frame of the image.
     /// </summary>
     /// <typeparam name="TPixel">The pixel format.</typeparam>
-    public sealed class ImageFrame<TPixel> : IPixelSource<TPixel>, IDisposable
+    public sealed class ImageFrame<TPixel> : ImageFrame, IPixelSource<TPixel>, IDisposable
         where TPixel : struct, IPixel<TPixel>
     {
         private bool isDisposed;
@@ -53,8 +56,12 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The metadata.</param>
         internal ImageFrame(Configuration configuration, int width, int height, ImageFrameMetadata metadata)
-            : this(configuration, width, height, default(TPixel), metadata)
+            : base(configuration, width, height, metadata)
         {
+            Guard.MustBeGreaterThan(width, 0, nameof(width));
+            Guard.MustBeGreaterThan(height, 0, nameof(height));
+
+            this.PixelBuffer = this.MemoryAllocator.Allocate2D<TPixel>(width, height, AllocationOptions.Clean);
         }
 
         /// <summary>
@@ -78,15 +85,12 @@ namespace SixLabors.ImageSharp
         /// <param name="backgroundColor">The color to clear the image with.</param>
         /// <param name="metadata">The metadata.</param>
         internal ImageFrame(Configuration configuration, int width, int height, TPixel backgroundColor, ImageFrameMetadata metadata)
+            : base(configuration, width, height, metadata)
         {
-            Guard.NotNull(configuration, nameof(configuration));
             Guard.MustBeGreaterThan(width, 0, nameof(width));
             Guard.MustBeGreaterThan(height, 0, nameof(height));
 
-            this.Configuration = configuration;
-            this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = this.MemoryAllocator.Allocate2D<TPixel>(width, height);
-            this.Metadata = metadata ?? new ImageFrameMetadata();
             this.Clear(configuration.GetParallelOptions(), backgroundColor);
         }
 
@@ -111,16 +115,12 @@ namespace SixLabors.ImageSharp
         /// <param name="memorySource">The memory source.</param>
         /// <param name="metadata">The metadata.</param>
         internal ImageFrame(Configuration configuration, int width, int height, MemorySource<TPixel> memorySource, ImageFrameMetadata metadata)
+            : base(configuration, width, height, metadata)
         {
-            Guard.NotNull(configuration, nameof(configuration));
             Guard.MustBeGreaterThan(width, 0, nameof(width));
             Guard.MustBeGreaterThan(height, 0, nameof(height));
-            Guard.NotNull(metadata, nameof(metadata));
 
-            this.Configuration = configuration;
-            this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = new Buffer2D<TPixel>(memorySource, width, height);
-            this.Metadata = metadata;
         }
 
         /// <summary>
@@ -129,27 +129,15 @@ namespace SixLabors.ImageSharp
         /// <param name="configuration">The configuration which allows altering default behaviour or extending the library.</param>
         /// <param name="source">The source.</param>
         internal ImageFrame(Configuration configuration, ImageFrame<TPixel> source)
+            : base(configuration, source.Width, source.Height, source.Metadata.DeepClone())
         {
             Guard.NotNull(configuration, nameof(configuration));
             Guard.NotNull(source, nameof(source));
 
-            this.Configuration = configuration;
-            this.MemoryAllocator = configuration.MemoryAllocator;
             this.PixelBuffer = this.MemoryAllocator.Allocate2D<TPixel>(source.PixelBuffer.Width, source.PixelBuffer.Height);
             source.PixelBuffer.GetSpan().CopyTo(this.PixelBuffer.GetSpan());
-            this.Metadata = source.Metadata.DeepClone();
         }
 
-        /// <summary>
-        /// Gets the <see cref="MemoryAllocator" /> to use for buffer allocations.
-        /// </summary>
-        public MemoryAllocator MemoryAllocator { get; }
-
-        /// <summary>
-        /// Gets the <see cref="Configuration"/> instance associated with this <see cref="ImageFrame{TPixel}"/>.
-        /// </summary>
-        internal Configuration Configuration { get; }
-
         /// <summary>
         /// Gets the image pixels. Not private as Buffer2D requires an array in its constructor.
         /// </summary>
@@ -158,21 +146,6 @@ namespace SixLabors.ImageSharp
         /// <inheritdoc/>
         Buffer2D<TPixel> IPixelSource<TPixel>.PixelBuffer => this.PixelBuffer;
 
-        /// <summary>
-        /// Gets the width.
-        /// </summary>
-        public int Width => this.PixelBuffer.Width;
-
-        /// <summary>
-        /// Gets the height.
-        /// </summary>
-        public int Height => this.PixelBuffer.Height;
-
-        /// <summary>
-        /// Gets the metadata of the frame.
-        /// </summary>
-        public ImageFrameMetadata Metadata { get; }
-
         /// <summary>
         /// Gets or sets the pixel at the specified position.
         /// </summary>
@@ -188,18 +161,6 @@ namespace SixLabors.ImageSharp
             set => this.PixelBuffer[x, y] = value;
         }
 
-        /// <summary>
-        /// Gets the size of the frame.
-        /// </summary>
-        /// <returns>The <see cref="Size"/></returns>
-        public Size Size() => new Size(this.Width, this.Height);
-
-        /// <summary>
-        /// Gets the bounds of the frame.
-        /// </summary>
-        /// <returns>The <see cref="Rectangle"/></returns>
-        public Rectangle Bounds() => new Rectangle(0, 0, this.Width, this.Height);
-
         /// <summary>
         /// Gets a reference to the pixel at the specified position.
         /// </summary>
@@ -232,12 +193,13 @@ namespace SixLabors.ImageSharp
             Guard.NotNull(pixelSource, nameof(pixelSource));
 
             Buffer2D<TPixel>.SwapOrCopyContent(this.PixelBuffer, pixelSource.PixelBuffer);
+            this.UpdateSize(this.PixelBuffer.Size());
         }
 
         /// <summary>
         /// Disposes the object and frees resources for the Garbage Collector.
         /// </summary>
-        internal void Dispose()
+        public override void Dispose()
         {
             if (this.isDisposed)
             {
@@ -251,6 +213,17 @@ namespace SixLabors.ImageSharp
             this.isDisposed = true;
         }
 
+        internal override void CopyPixelsTo<TDestinationPixel>(Span<TDestinationPixel> destination)
+        {
+            if (typeof(TPixel) == typeof(TDestinationPixel))
+            {
+                Span<TPixel> dest1 = MemoryMarshal.Cast<TDestinationPixel, TPixel>(destination);
+                this.PixelBuffer.Span.CopyTo(dest1);
+            }
+
+            PixelOperations<TPixel>.Instance.To(this.Configuration, this.PixelBuffer.Span, destination);
+        }
+
         /// <inheritdoc/>
         public override string ToString() => $"ImageFrame<{typeof(TPixel).Name}>({this.Width}x{this.Height})";
 
@@ -325,8 +298,5 @@ namespace SixLabors.ImageSharp
                 span.Fill(value);
             }
         }
-
-        /// <inheritdoc/>
-        void IDisposable.Dispose() => this.Dispose();
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/ImageSharp.csproj b/src/ImageSharp/ImageSharp.csproj
index a3d614a067..3b02114349 100644
--- a/src/ImageSharp/ImageSharp.csproj
+++ b/src/ImageSharp/ImageSharp.csproj
@@ -5,6 +5,16 @@
     <AssemblyName>SixLabors.ImageSharp</AssemblyName>
     <AssemblyTitle>SixLabors.ImageSharp</AssemblyTitle>
     <Description>A cross-platform library for the processing of image files; written in C#</Description>
+    <NeutralLanguage>en</NeutralLanguage>
+
+    <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
+    <VersionPrefix Condition="$(packageversion) == ''">0.0.1</VersionPrefix>
+
+    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
+
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+    <AssemblyName>SixLabors.ImageSharp</AssemblyName>
     <PackageId>SixLabors.ImageSharp</PackageId>
     <PackageTags>Image Resize Crop Gif Jpg Jpeg Bitmap Png Core</PackageTags>
     <RootNamespace>SixLabors.ImageSharp</RootNamespace>
diff --git a/src/ImageSharp/Image{TPixel}.cs b/src/ImageSharp/Image{TPixel}.cs
index 2b93b710b0..5d0364dd87 100644
--- a/src/ImageSharp/Image{TPixel}.cs
+++ b/src/ImageSharp/Image{TPixel}.cs
@@ -80,7 +80,12 @@ namespace SixLabors.ImageSharp
         /// <param name="width">The width of the image in pixels.</param>
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="metadata">The images metadata.</param>
-        internal Image(Configuration configuration, MemorySource<TPixel> memorySource, int width, int height, ImageMetadata metadata)
+        internal Image(
+            Configuration configuration,
+            MemorySource<TPixel> memorySource,
+            int width,
+            int height,
+            ImageMetadata metadata)
             : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, width, height)
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, memorySource);
@@ -95,7 +100,12 @@ namespace SixLabors.ImageSharp
         /// <param name="height">The height of the image in pixels.</param>
         /// <param name="backgroundColor">The color to initialize the pixels with.</param>
         /// <param name="metadata">The images metadata.</param>
-        internal Image(Configuration configuration, int width, int height, TPixel backgroundColor, ImageMetadata metadata)
+        internal Image(
+            Configuration configuration,
+            int width,
+            int height,
+            TPixel backgroundColor,
+            ImageMetadata metadata)
             : base(configuration, PixelTypeInfo.Create<TPixel>(), metadata, width, height)
         {
             this.Frames = new ImageFrameCollection<TPixel>(this, width, height, backgroundColor);
@@ -114,10 +124,13 @@ namespace SixLabors.ImageSharp
             this.Frames = new ImageFrameCollection<TPixel>(this, frames);
         }
 
+        /// <inheritdoc />
+        protected override ImageFrameCollection NonGenericFrameCollection => this.Frames;
+
         /// <summary>
         /// Gets the frames.
         /// </summary>
-        public ImageFrameCollection<TPixel> Frames { get; }
+        public new ImageFrameCollection<TPixel> Frames { get; }
 
         /// <summary>
         /// Gets the root frame.
@@ -149,7 +162,8 @@ namespace SixLabors.ImageSharp
         /// <returns>Returns a new <see cref="Image{TPixel}"/> with all the same pixel data as the original.</returns>
         public Image<TPixel> Clone(Configuration configuration)
         {
-            IEnumerable<ImageFrame<TPixel>> clonedFrames = this.Frames.Select(x => x.Clone(configuration));
+            IEnumerable<ImageFrame<TPixel>> clonedFrames =
+                this.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel>>(x => x.Clone(configuration));
             return new Image<TPixel>(configuration, this.Metadata.DeepClone(), clonedFrames);
         }
 
@@ -161,7 +175,8 @@ namespace SixLabors.ImageSharp
         /// <returns>The <see cref="Image{TPixel2}"/>.</returns>
         public override Image<TPixel2> CloneAs<TPixel2>(Configuration configuration)
         {
-            IEnumerable<ImageFrame<TPixel2>> clonedFrames = this.Frames.Select(x => x.CloneAs<TPixel2>(configuration));
+            IEnumerable<ImageFrame<TPixel2>> clonedFrames =
+                this.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel2>>(x => x.CloneAs<TPixel2>(configuration));
             return new Image<TPixel2>(configuration, this.Metadata.DeepClone(), clonedFrames);
         }
 
@@ -214,4 +229,4 @@ namespace SixLabors.ImageSharp
             return rootSize;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
index 4cff1f8c10..8481fc62c9 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -222,6 +223,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromArgb32(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Argb32> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToArgb32(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.tt
index 0a58504e15..3a4c7b459d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Argb32.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Argb32"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
index 225e4b5e01..4b2b3a02e4 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -196,6 +197,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromBgr24(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Bgr24> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToBgr24(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.tt
index 84b89aa32c..cfaefeda9c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgr24.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Bgr24"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
index ce049115ea..95d85c7c8d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -222,6 +223,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromBgra32(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Bgra32> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToBgra32(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.tt
index 004ceff51e..58ecfa5a6c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Bgra32.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Bgra32"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.cs
index 288c5d92e4..e6ed75d49a 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -185,6 +186,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromGray16(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Gray16> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToGray16(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.tt
index 3cbc01e88c..ac484bdbc0 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray16.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Gray16"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.cs
index f7e94788e3..c9a3a06fe6 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -185,6 +186,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromGray8(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Gray8> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToGray8(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.tt
index d35843ccda..ffa15af9dc 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Gray8.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Gray8"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
index 02a8869ecc..ef224c02dc 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -196,6 +197,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromRgb24(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Rgb24> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToRgb24(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.tt
index d96c3684b5..fc149b2380 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb24.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Rgb24"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.cs
index 30c9972bbf..6943888992 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -185,6 +186,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromRgb48(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Rgb48> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToRgb48(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.tt
index 7bff336386..957c8f886c 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgb48.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Rgb48"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.cs
index da2ce3770b..f0c8bc8842 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -211,6 +212,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromRgba32(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Rgba32> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToRgba32(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.tt
index 6b9e2d1248..905e2cc58f 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba32.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Rgba32"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.cs
index 42c40ad5d7..0faa6eb44d 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <content>
@@ -185,6 +186,15 @@ namespace SixLabors.ImageSharp.PixelFormats
                     dp.FromRgba64(sp);
                 }
             }
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<Rgba64> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.ToRgba64(configuration, sourcePixels, destinationPixels);
+            }
+
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.tt b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.tt
index d15945f947..03179a3920 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.tt
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/Rgba64.PixelOperations.Generated.tt
@@ -16,4 +16,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             <# GenerateAllDefaultConversionMethods("Rgba64"); #>
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
index 584615532d..17e9469f31 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Generated/_Common.ttinclude
@@ -22,6 +22,19 @@ using System.Runtime.InteropServices;
     // Types with Rgba32-combatible to/from Vector4 conversion
     static readonly string[] Rgba32CompatibleTypes = { "Argb32", "Bgra32", "Rgb24", "Bgr24" };
 
+    void GenerateGenericConverterMethods(string pixelType)
+    {
+#>
+            /// <inheritdoc />
+            internal override void From<TSourcePixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<<#=pixelType#>> destinationPixels)
+            {
+                PixelOperations<TSourcePixel>.Instance.To<#=pixelType#>(configuration, sourcePixels, destinationPixels);
+            }
+<#+
+    }
 
     void GenerateDefaultSelfConversionMethods(string pixelType)
     {
@@ -117,7 +130,7 @@ using System.Runtime.InteropServices;
            }
 #>
             /// <inheritdoc />
-            internal override void FromVector4(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels, PixelConversionModifiers modifiers)
+            internal override void FromVector4Destructive(Configuration configuration, Span<Vector4> sourceVectors, Span<<#=pixelType#>> destPixels, PixelConversionModifiers modifiers)
             {
                 Vector4Converters.RgbaCompatible.FromVector4(configuration, this, sourceVectors, destPixels, modifiers.Remove(<#=removeTheseModifiers#>));
             }
@@ -156,5 +169,7 @@ using System.Runtime.InteropServices;
         {
             GenerateDefaultConvertToMethod(pixelType, destPixelType);
         }
+
+        GenerateGenericConverterMethods(pixelType);
     }
 #>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
index 6fce1c7575..195a8bedb0 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Gray16.cs
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void FromScaledVector4(Vector4 vector) => this.FromVector4(vector);
+        public void FromScaledVector4(Vector4 vector) => this.ConvertFromRgbaScaledVector4(vector);
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -62,11 +62,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void FromVector4(Vector4 vector)
-        {
-            vector = Vector4.Clamp(vector, Vector4.Zero, Vector4.One) * Max * Average;
-            this.PackedValue = (ushort)MathF.Round(vector.X + vector.Y + vector.Z);
-        }
+        public void FromVector4(Vector4 vector) => this.ConvertFromRgbaScaledVector4(vector);
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -176,9 +172,9 @@ namespace SixLabors.ImageSharp.PixelFormats
         {
             vector = Vector4.Clamp(vector, Vector4.Zero, Vector4.One) * Max;
             this.PackedValue = ImageMaths.Get16BitBT709Luminance(
-                (ushort)MathF.Round(vector.X),
-                (ushort)MathF.Round(vector.Y),
-                (ushort)MathF.Round(vector.Z));
+                vector.X,
+                vector.Y,
+                vector.Z);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
index 1c278b434c..09597a949f 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Gray8.cs
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void FromScaledVector4(Vector4 vector) => this.FromVector4(vector);
+        public void FromScaledVector4(Vector4 vector) => this.ConvertFromRgbaScaledVector4(vector);
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -67,15 +67,7 @@ namespace SixLabors.ImageSharp.PixelFormats
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void FromVector4(Vector4 vector)
-        {
-            vector = Vector4.Max(Min, vector);
-            vector = Vector4.Min(Max, vector);
-
-            float roundedSum = Vector4.Dot(vector, Accumulator);
-
-            this.PackedValue = (byte)roundedSum;
-        }
+        public void FromVector4(Vector4 vector) => this.ConvertFromRgbaScaledVector4(vector);
 
         /// <inheritdoc />
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -166,4 +158,4 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.PackedValue = ImageMaths.Get8BitBT709Luminance((byte)vector.X, (byte)vector.Y, (byte)vector.Z);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
index 3112126e76..b331dbd99f 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/RgbaVector.PixelOperations.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Numerics;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 using SixLabors.ImageSharp.PixelFormats.Utils;
@@ -44,6 +45,38 @@ namespace SixLabors.ImageSharp.PixelFormats
                 MemoryMarshal.Cast<RgbaVector, Vector4>(sourcePixels).CopyTo(destVectors);
                 Vector4Converters.ApplyForwardConversionModifiers(destVectors, modifiers);
             }
+
+            internal override void ToGray8(Configuration configuration, ReadOnlySpan<RgbaVector> sourcePixels, Span<Gray8> destPixels)
+            {
+                Guard.DestinationShouldNotBeTooShort(sourcePixels, destPixels, nameof(destPixels));
+
+                ref Vector4 sourceBaseRef = ref Unsafe.As<RgbaVector, Vector4>(ref MemoryMarshal.GetReference(sourcePixels));
+                ref Gray8 destBaseRef = ref MemoryMarshal.GetReference(destPixels);
+
+                for (int i = 0; i < sourcePixels.Length; i++)
+                {
+                    ref Vector4 sp = ref Unsafe.Add(ref sourceBaseRef, i);
+                    ref Gray8 dp = ref Unsafe.Add(ref destBaseRef, i);
+
+                    dp.ConvertFromRgbaScaledVector4(sp);
+                }
+            }
+
+            internal override void ToGray16(Configuration configuration, ReadOnlySpan<RgbaVector> sourcePixels, Span<Gray16> destPixels)
+            {
+                Guard.DestinationShouldNotBeTooShort(sourcePixels, destPixels, nameof(destPixels));
+
+                ref Vector4 sourceBaseRef = ref Unsafe.As<RgbaVector, Vector4>(ref MemoryMarshal.GetReference(sourcePixels));
+                ref Gray16 destBaseRef = ref MemoryMarshal.GetReference(destPixels);
+
+                for (int i = 0; i < sourcePixels.Length; i++)
+                {
+                    ref Vector4 sp = ref Unsafe.Add(ref sourceBaseRef, i);
+                    ref Gray16 dp = ref Unsafe.Add(ref destBaseRef, i);
+
+                    dp.ConvertFromRgbaScaledVector4(sp);
+                }
+            }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
index d009822e80..2b2d79c732 100644
--- a/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
+++ b/src/ImageSharp/PixelFormats/PixelOperations{TPixel}.cs
@@ -7,6 +7,8 @@ using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
+using SixLabors.ImageSharp.Memory;
+
 namespace SixLabors.ImageSharp.PixelFormats
 {
     /// <summary>
@@ -89,63 +91,56 @@ namespace SixLabors.ImageSharp.PixelFormats
             Span<Vector4> destVectors) =>
             this.ToVector4(configuration, sourcePixels, destVectors, PixelConversionModifiers.None);
 
-        /// <summary>
-        /// Converts 'sourceColors.Length' pixels from 'sourceColors' into 'destinationColors'.
-        /// </summary>
-        /// <typeparam name="TDestinationPixel">The destination pixel type.</typeparam>
-        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations</param>
-        /// <param name="sourceColors">The <see cref="Span{T}"/> to the source colors.</param>
-        /// <param name="destinationColors">The <see cref="Span{T}"/> to the destination colors.</param>
-        internal virtual void To<TDestinationPixel>(
+        internal virtual void From<TSourcePixel>(
             Configuration configuration,
-            ReadOnlySpan<TPixel> sourceColors,
-            Span<TDestinationPixel> destinationColors)
-            where TDestinationPixel : struct, IPixel<TDestinationPixel>
+            ReadOnlySpan<TSourcePixel> sourcePixels,
+            Span<TPixel> destinationPixels)
+            where TSourcePixel : struct, IPixel<TSourcePixel>
         {
-            Guard.NotNull(configuration, nameof(configuration));
-            Guard.DestinationShouldNotBeTooShort(sourceColors, destinationColors, nameof(destinationColors));
-
-            int count = sourceColors.Length;
-            ref TPixel sourceRef = ref MemoryMarshal.GetReference(sourceColors);
-
-            // Gray8 and Gray16 are special implementations of IPixel in that they do not conform to the
-            // standard RGBA colorspace format and must be converted from RGBA using the special ITU BT709 algorithm.
-            // One of the requirements of FromScaledVector4/ToScaledVector4 is that it unaware of this and
-            // packs/unpacks the pixel without and conversion so we employ custom methods do do this.
-            if (typeof(TDestinationPixel) == typeof(Gray16))
+            const int SliceLength = 1024;
+            int numberOfSlices = sourcePixels.Length / SliceLength;
+            using (IMemoryOwner<Vector4> tempVectors = configuration.MemoryAllocator.Allocate<Vector4>(SliceLength))
             {
-                ref Gray16 gray16Ref = ref MemoryMarshal.GetReference(MemoryMarshal.Cast<TDestinationPixel, Gray16>(destinationColors));
-                for (int i = 0; i < count; i++)
+                Span<Vector4> vectorSpan = tempVectors.GetSpan();
+                for (int i = 0; i < numberOfSlices; i++)
                 {
-                    ref TPixel sp = ref Unsafe.Add(ref sourceRef, i);
-                    ref Gray16 dp = ref Unsafe.Add(ref gray16Ref, i);
-                    dp.ConvertFromRgbaScaledVector4(sp.ToScaledVector4());
+                    int start = i * SliceLength;
+                    ReadOnlySpan<TSourcePixel> s = sourcePixels.Slice(start, SliceLength);
+                    Span<TPixel> d = destinationPixels.Slice(start, SliceLength);
+                    PixelOperations<TSourcePixel>.Instance.ToVector4(configuration, s, vectorSpan);
+                    this.FromVector4Destructive(configuration, vectorSpan, d);
                 }
 
-                return;
-            }
-
-            if (typeof(TDestinationPixel) == typeof(Gray8))
-            {
-                ref Gray8 gray8Ref = ref MemoryMarshal.GetReference(MemoryMarshal.Cast<TDestinationPixel, Gray8>(destinationColors));
-                for (int i = 0; i < count; i++)
+                int endOfCompleteSlices = numberOfSlices * SliceLength;
+                int remainder = sourcePixels.Length - endOfCompleteSlices;
+                if (remainder > 0)
                 {
-                    ref TPixel sp = ref Unsafe.Add(ref sourceRef, i);
-                    ref Gray8 dp = ref Unsafe.Add(ref gray8Ref, i);
-                    dp.ConvertFromRgbaScaledVector4(sp.ToScaledVector4());
+                    ReadOnlySpan<TSourcePixel> s = sourcePixels.Slice(endOfCompleteSlices);
+                    Span<TPixel> d = destinationPixels.Slice(endOfCompleteSlices);
+                    vectorSpan = vectorSpan.Slice(0, remainder);
+                    PixelOperations<TSourcePixel>.Instance.ToVector4(configuration, s, vectorSpan);
+                    this.FromVector4Destructive(configuration, vectorSpan, d);
                 }
-
-                return;
             }
+        }
 
-            // Normal conversion
-            ref TDestinationPixel destRef = ref MemoryMarshal.GetReference(destinationColors);
-            for (int i = 0; i < count; i++)
-            {
-                ref TPixel sp = ref Unsafe.Add(ref sourceRef, i);
-                ref TDestinationPixel dp = ref Unsafe.Add(ref destRef, i);
-                dp.FromScaledVector4(sp.ToScaledVector4());
-            }
+        /// <summary>
+        /// Converts 'sourcePixels.Length' pixels from 'sourcePixels' into 'destinationPixels'.
+        /// </summary>
+        /// <typeparam name="TDestinationPixel">The destination pixel type.</typeparam>
+        /// <param name="configuration">A <see cref="Configuration"/> to configure internal operations.</param>
+        /// <param name="sourcePixels">The <see cref="Span{T}"/> to the source pixels.</param>
+        /// <param name="destinationPixels">The <see cref="Span{T}"/> to the destination pixels.</param>
+        internal virtual void To<TDestinationPixel>(
+            Configuration configuration,
+            ReadOnlySpan<TPixel> sourcePixels,
+            Span<TDestinationPixel> destinationPixels)
+            where TDestinationPixel : struct, IPixel<TDestinationPixel>
+        {
+            Guard.NotNull(configuration, nameof(configuration));
+            Guard.DestinationShouldNotBeTooShort(sourcePixels, destinationPixels, nameof(destinationPixels));
+
+            PixelOperations<TDestinationPixel>.Instance.From(configuration, sourcePixels, destinationPixels);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
index 9625ca216e..529a49bf7a 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/AffineTransformProcessor{TPixel}.cs
@@ -35,7 +35,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel>>(
                 x => new ImageFrame<TPixel>(source.GetConfiguration(), this.TargetDimensions, x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
diff --git a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
index 4c4c27defa..25f8d78491 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/CropProcessor{TPixel}.cs
@@ -36,7 +36,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.CropRectangle.Width, this.CropRectangle.Height, x.Metadata.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel>>(
+                x => new ImageFrame<TPixel>(
+                    source.GetConfiguration(),
+                    this.CropRectangle.Width,
+                    this.CropRectangle.Height,
+                    x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
             return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
diff --git a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
index 15d8141baa..80b03000b8 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/ProjectiveTransformProcessor{TPixel}.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel>>(
                 x => new ImageFrame<TPixel>(
                     source.GetConfiguration(),
                     this.TargetDimensions.Width,
@@ -140,4 +140,4 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
index fdd1d339dd..fb03057a48 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeProcessor{TPixel}.cs
@@ -68,7 +68,12 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         protected override Image<TPixel> CreateDestination(Image<TPixel> source, Rectangle sourceRectangle)
         {
             // We will always be creating the clone even for mutate because we may need to resize the canvas
-            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select(x => new ImageFrame<TPixel>(source.GetConfiguration(), this.Width, this.Height, x.Metadata.DeepClone()));
+            IEnumerable<ImageFrame<TPixel>> frames = source.Frames.Select<ImageFrame<TPixel>, ImageFrame<TPixel>>(
+                x => new ImageFrame<TPixel>(
+                    source.GetConfiguration(),
+                    this.Width,
+                    this.Height,
+                    x.Metadata.DeepClone()));
 
             // Use the overload to prevent an extra frame being added
             return new Image<TPixel>(source.GetConfiguration(), source.Metadata.DeepClone(), frames);
diff --git a/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.Generic.cs b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.Generic.cs
new file mode 100644
index 0000000000..37c3a27cd0
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.Generic.cs
@@ -0,0 +1,346 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Linq;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public abstract partial class ImageFrameCollectionTests
+    {
+        [GroupOutput("ImageFramesCollectionTests")]
+        public class Generic : ImageFrameCollectionTests
+        {
+            [Fact]
+            public void Constructor_ShouldCreateOneFrame()
+            {
+                Assert.Equal(1, this.Collection.Count);
+            }
+
+            [Fact]
+            public void AddNewFrame_FramesMustHaveSameSize()
+            {
+                ArgumentException ex = Assert.Throws<ArgumentException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame(new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
+                    });
+
+                Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
+            }
+
+            [Fact]
+            public void AddNewFrame_Frame_FramesNotBeNull()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame((ImageFrame<Rgba32>)null);
+                    });
+
+                Assert.StartsWith("Value cannot be null.", ex.Message);
+            }
+
+            [Fact]
+            public void AddNewFrame_PixelBuffer_DataMustNotBeNull()
+            {
+                Rgba32[] data = null;
+
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame(data);
+                    });
+
+                Assert.StartsWith("Value cannot be null.", ex.Message);
+            }
+
+            [Fact]
+            public void AddNewFrame_PixelBuffer_BufferIncorrectSize()
+            {
+                ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame(new Rgba32[0]);
+                    });
+
+                Assert.StartsWith("Value 0 must be greater than or equal to 100.", ex.Message);
+            }
+
+            [Fact]
+            public void InsertNewFrame_FramesMustHaveSameSize()
+            {
+                ArgumentException ex = Assert.Throws<ArgumentException>(
+                    () =>
+                    {
+                        this.Collection.InsertFrame(1, new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
+                    });
+
+                Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
+            }
+
+            [Fact]
+            public void InsertNewFrame_FramesNotBeNull()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                    {
+                        this.Collection.InsertFrame(1, null);
+                    });
+
+                Assert.StartsWith("Value cannot be null.", ex.Message);
+            }
+
+            [Fact]
+            public void Constructor_FramesMustHaveSameSize()
+            {
+                ArgumentException ex = Assert.Throws<ArgumentException>(
+                    () =>
+                    {
+                        var collection = new ImageFrameCollection<Rgba32>(
+                            this.Image,
+                            new[]
+                            {
+                                new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                                new ImageFrame<Rgba32>(Configuration.Default, 1, 1)
+                            });
+                    });
+
+                Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
+            }
+
+            [Fact]
+            public void RemoveAtFrame_ThrowIfRemovingLastFrame()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[] { new ImageFrame<Rgba32>(Configuration.Default, 10, 10) });
+
+                InvalidOperationException ex = Assert.Throws<InvalidOperationException>(
+                    () =>
+                    {
+                        collection.RemoveFrame(0);
+                    });
+                Assert.Equal("Cannot remove last frame.", ex.Message);
+            }
+
+            [Fact]
+            public void RemoveAtFrame_CanRemoveFrameZeroIfMultipleFramesExist()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[]
+                    {
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10)
+                    });
+
+                collection.RemoveFrame(0);
+                Assert.Equal(1, collection.Count);
+            }
+
+            [Fact]
+            public void RootFrameIsFrameAtIndexZero()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[]
+                    {
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10)
+                    });
+
+                Assert.Equal(collection.RootFrame, collection[0]);
+            }
+
+            [Fact]
+            public void ConstructorPopulatesFrames()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[]
+                    {
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10)
+                    });
+
+                Assert.Equal(2, collection.Count);
+            }
+
+            [Fact]
+            public void DisposeClearsCollection()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[]
+                    {
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10)
+                    });
+
+                collection.Dispose();
+
+                Assert.Equal(0, collection.Count);
+            }
+
+            [Fact]
+            public void Dispose_DisposesAllInnerFrames()
+            {
+                var collection = new ImageFrameCollection<Rgba32>(
+                    this.Image,
+                    new[]
+                    {
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10),
+                        new ImageFrame<Rgba32>(Configuration.Default, 10, 10)
+                    });
+
+                IPixelSource<Rgba32>[] framesSnapShot = collection.OfType<IPixelSource<Rgba32>>().ToArray();
+                collection.Dispose();
+
+                Assert.All(
+                    framesSnapShot,
+                    f =>
+                    {
+                        // the pixel source of the frame is null after its been disposed.
+                        Assert.Null(f.PixelBuffer);
+                    });
+            }
+
+            [Theory]
+            [WithTestPatternImages(10, 10, PixelTypes.Rgba32)]
+            public void CloneFrame<TPixel>(TestImageProvider<TPixel> provider)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image<TPixel> img = provider.GetImage())
+                {
+                    img.Frames.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10)); // add a frame anyway
+                    using (Image<TPixel> cloned = img.Frames.CloneFrame(0))
+                    {
+                        Assert.Equal(2, img.Frames.Count);
+                        cloned.ComparePixelBufferTo(img.GetPixelSpan());
+                    }
+                }
+            }
+
+            [Theory]
+            [WithTestPatternImages(10, 10, PixelTypes.Rgba32)]
+            public void ExtractFrame<TPixel>(TestImageProvider<TPixel> provider)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image<TPixel> img = provider.GetImage())
+                {
+                    var sourcePixelData = img.GetPixelSpan().ToArray();
+
+                    img.Frames.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10));
+                    using (Image<TPixel> cloned = img.Frames.ExportFrame(0))
+                    {
+                        Assert.Equal(1, img.Frames.Count);
+                        cloned.ComparePixelBufferTo(sourcePixelData);
+                    }
+                }
+            }
+
+            [Fact]
+            public void CreateFrame_Default()
+            {
+                this.Image.Frames.CreateFrame();
+
+                Assert.Equal(2, this.Image.Frames.Count);
+                this.Image.Frames[1].ComparePixelBufferTo(default(Rgba32));
+            }
+
+            [Fact]
+            public void CreateFrame_CustomFillColor()
+            {
+                this.Image.Frames.CreateFrame(Rgba32.HotPink);
+
+                Assert.Equal(2, this.Image.Frames.Count);
+                this.Image.Frames[1].ComparePixelBufferTo(Rgba32.HotPink);
+            }
+
+            [Fact]
+            public void AddFrameFromPixelData()
+            {
+                var pixelData = this.Image.Frames.RootFrame.GetPixelSpan().ToArray();
+                this.Image.Frames.AddFrame(pixelData);
+                Assert.Equal(2, this.Image.Frames.Count);
+            }
+
+            [Fact]
+            public void AddFrame_clones_sourceFrame()
+            {
+                var pixelData = this.Image.Frames.RootFrame.GetPixelSpan().ToArray();
+                var otherFRame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
+                var addedFrame = this.Image.Frames.AddFrame(otherFRame);
+                addedFrame.ComparePixelBufferTo(otherFRame.GetPixelSpan());
+                Assert.NotEqual(otherFRame, addedFrame);
+            }
+
+            [Fact]
+            public void InsertFrame_clones_sourceFrame()
+            {
+                var pixelData = this.Image.Frames.RootFrame.GetPixelSpan().ToArray();
+                var otherFRame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
+                var addedFrame = this.Image.Frames.InsertFrame(0, otherFRame);
+                addedFrame.ComparePixelBufferTo(otherFRame.GetPixelSpan());
+                Assert.NotEqual(otherFRame, addedFrame);
+            }
+
+            [Fact]
+            public void MoveFrame_LeavesFrmaeInCorrectLocation()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                this.Image.Frames.MoveFrame(4, 7);
+                var newIndex = this.Image.Frames.IndexOf(frame);
+                Assert.Equal(7, newIndex);
+            }
+
+            [Fact]
+            public void IndexOf_ReturnsCorrectIndex()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                var index = this.Image.Frames.IndexOf(frame);
+                Assert.Equal(4, index);
+            }
+
+            [Fact]
+            public void Contains_TrueIfMember()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                Assert.True(this.Image.Frames.Contains(frame));
+            }
+
+            [Fact]
+            public void Contains_FalseIfNonMember()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
+                Assert.False(this.Image.Frames.Contains(frame));
+            }
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.NonGeneric.cs b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.NonGeneric.cs
new file mode 100644
index 0000000000..0956cce9c4
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.NonGeneric.cs
@@ -0,0 +1,325 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Drawing.Imaging;
+using System.Linq;
+
+using SixLabors.ImageSharp.Advanced;
+using SixLabors.ImageSharp.Formats.Gif;
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public abstract partial class ImageFrameCollectionTests
+    {
+        [GroupOutput("ImageFramesCollectionTests")]
+        public class NonGeneric : ImageFrameCollectionTests
+        {
+            private new Image Image => base.Image;
+
+            private new ImageFrameCollection Collection => base.Collection;
+
+            [Fact]
+            public void AddFrame_OfDifferentPixelType()
+            {
+                using (Image<Bgra32> sourceImage = new Image<Bgra32>(
+                    this.Image.GetConfiguration(),
+                    this.Image.Width,
+                    this.Image.Height,
+                    (Bgra32)Color.Blue))
+                {
+                    this.Collection.AddFrame(sourceImage.Frames.RootFrame);
+                }
+
+                Rgba32[] expectedAllBlue =
+                    Enumerable.Repeat(Rgba32.Blue, this.Image.Width * this.Image.Height).ToArray();
+
+                Assert.Equal(2, this.Collection.Count);
+                ImageFrame<Rgba32> actualFrame = (ImageFrame<Rgba32>)this.Collection[1];
+
+                actualFrame.ComparePixelBufferTo(expectedAllBlue);
+            }
+
+            [Fact]
+            public void InsertFrame_OfDifferentPixelType()
+            {
+                using (Image<Bgra32> sourceImage = new Image<Bgra32>(
+                    this.Image.GetConfiguration(),
+                    this.Image.Width,
+                    this.Image.Height,
+                    (Bgra32)Color.Blue))
+                {
+                    this.Collection.InsertFrame(0, sourceImage.Frames.RootFrame);
+                }
+
+                Rgba32[] expectedAllBlue =
+                    Enumerable.Repeat(Rgba32.Blue, this.Image.Width * this.Image.Height).ToArray();
+
+                Assert.Equal(2, this.Collection.Count);
+                ImageFrame<Rgba32> actualFrame = (ImageFrame<Rgba32>)this.Collection[0];
+
+                actualFrame.ComparePixelBufferTo(expectedAllBlue);
+
+            }
+
+            [Fact]
+            public void Constructor_ShouldCreateOneFrame()
+            {
+                Assert.Equal(1, this.Collection.Count);
+            }
+
+            [Fact]
+            public void AddNewFrame_FramesMustHaveSameSize()
+            {
+                ArgumentException ex = Assert.Throws<ArgumentException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame(new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
+                    });
+
+                Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
+            }
+
+            [Fact]
+            public void AddNewFrame_Frame_FramesNotBeNull()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                    {
+                        this.Collection.AddFrame((ImageFrame<Rgba32>)null);
+                    });
+
+                Assert.StartsWith("Value cannot be null.", ex.Message);
+            }
+
+            [Fact]
+            public void InsertNewFrame_FramesMustHaveSameSize()
+            {
+                ArgumentException ex = Assert.Throws<ArgumentException>(
+                    () =>
+                    {
+                        this.Collection.InsertFrame(1, new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
+                    });
+
+                Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
+            }
+
+            [Fact]
+            public void InsertNewFrame_FramesNotBeNull()
+            {
+                ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
+                    () =>
+                    {
+                        this.Collection.InsertFrame(1, null);
+                    });
+
+                Assert.StartsWith("Value cannot be null.", ex.Message);
+            }
+
+
+            [Fact]
+            public void RemoveAtFrame_ThrowIfRemovingLastFrame()
+            {
+
+                InvalidOperationException ex = Assert.Throws<InvalidOperationException>(
+                    () =>
+                    {
+                        this.Collection.RemoveFrame(0);
+                    });
+                Assert.Equal("Cannot remove last frame.", ex.Message);
+            }
+
+            [Fact]
+            public void RemoveAtFrame_CanRemoveFrameZeroIfMultipleFramesExist()
+            {
+                this.Collection.AddFrame(new ImageFrame<Rgba32>(Configuration.Default, 10, 10));
+
+                this.Collection.RemoveFrame(0);
+                Assert.Equal(1, this.Collection.Count);
+            }
+
+            [Fact]
+            public void RootFrameIsFrameAtIndexZero()
+            {
+                Assert.Equal(this.Collection.RootFrame, this.Collection[0]);
+            }
+
+            [Theory]
+            [WithTestPatternImages(10, 10, PixelTypes.Rgba32 | PixelTypes.Bgr24)]
+            public void CloneFrame<TPixel>(TestImageProvider<TPixel> provider)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image<TPixel> img = provider.GetImage())
+                {
+                    ImageFrameCollection nonGenericFrameCollection = img.Frames;
+
+                    nonGenericFrameCollection.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10)); // add a frame anyway
+                    using (Image cloned = nonGenericFrameCollection.CloneFrame(0))
+                    {
+                        Assert.Equal(2, img.Frames.Count);
+
+                        Image<TPixel> expectedClone = (Image<TPixel>)cloned;
+
+                        expectedClone.ComparePixelBufferTo(img.GetPixelSpan());
+                    }
+                }
+            }
+
+            [Theory]
+            [WithTestPatternImages(10, 10, PixelTypes.Rgba32)]
+            public void ExtractFrame<TPixel>(TestImageProvider<TPixel> provider)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image<TPixel> img = provider.GetImage())
+                {
+                    var sourcePixelData = img.GetPixelSpan().ToArray();
+
+                    ImageFrameCollection nonGenericFrameCollection = img.Frames;
+
+                    nonGenericFrameCollection.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10));
+                    using (Image cloned = nonGenericFrameCollection.ExportFrame(0))
+                    {
+                        Assert.Equal(1, img.Frames.Count);
+
+                        Image<TPixel> expectedClone = (Image<TPixel>)cloned;
+                        expectedClone.ComparePixelBufferTo(sourcePixelData);
+                    }
+                }
+            }
+
+            [Fact]
+            public void CreateFrame_Default()
+            {
+                this.Image.Frames.CreateFrame();
+
+                Assert.Equal(2, this.Image.Frames.Count);
+
+                ImageFrame<Rgba32> frame = (ImageFrame<Rgba32>)this.Image.Frames[1];
+
+                frame.ComparePixelBufferTo(default(Rgba32));
+            }
+
+            [Fact]
+            public void CreateFrame_CustomFillColor()
+            {
+                this.Image.Frames.CreateFrame(Rgba32.HotPink);
+
+                Assert.Equal(2, this.Image.Frames.Count);
+
+                ImageFrame<Rgba32> frame = (ImageFrame<Rgba32>)this.Image.Frames[1];
+
+                frame.ComparePixelBufferTo(Rgba32.HotPink);
+            }
+
+            [Fact]
+            public void MoveFrame_LeavesFrmaeInCorrectLocation()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                this.Image.Frames.MoveFrame(4, 7);
+                var newIndex = this.Image.Frames.IndexOf(frame);
+                Assert.Equal(7, newIndex);
+            }
+
+            [Fact]
+            public void IndexOf_ReturnsCorrectIndex()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                var index = this.Image.Frames.IndexOf(frame);
+                Assert.Equal(4, index);
+            }
+
+            [Fact]
+            public void Contains_TrueIfMember()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = this.Image.Frames[4];
+                Assert.True(this.Image.Frames.Contains(frame));
+            }
+
+            [Fact]
+            public void Contains_FalseIfNonMember()
+            {
+                for (var i = 0; i < 9; i++)
+                {
+                    this.Image.Frames.CreateFrame();
+                }
+
+                var frame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
+                Assert.False(this.Image.Frames.Contains(frame));
+            }
+
+            /// <summary>
+            /// Integration test for end-to end API validation.
+            /// </summary>
+            [Theory]
+            [WithFile(TestImages.Gif.Giphy, PixelTypes.Rgba32)]
+            public void ConstructGif_FromDifferentPixelTypes<TPixel>(TestImageProvider<TPixel> provider)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image source = provider.GetImage())
+                using (Image<TPixel> dest = new Image<TPixel>(source.GetConfiguration(), source.Width, source.Height))
+                {
+                    // Giphy.gif has 5 frames
+
+                    ImportFrameAs<Bgra32>(source.Frames, dest.Frames, 0);
+                    ImportFrameAs<Argb32>(source.Frames, dest.Frames, 1);
+                    ImportFrameAs<Rgba64>(source.Frames, dest.Frames, 2);
+                    ImportFrameAs<Rgba32>(source.Frames, dest.Frames, 3);
+                    ImportFrameAs<Bgra32>(source.Frames, dest.Frames, 4);
+
+                    // Drop the original empty root frame:
+                    dest.Frames.RemoveFrame(0);
+
+                    dest.DebugSave(provider, appendSourceFileOrDescription: false, extension: "gif");
+                    dest.CompareToOriginal(provider);
+
+                    for (int i = 0; i < 5; i++)
+                    {
+                        CompareGifMetadata(source.Frames[i], dest.Frames[i]);
+                    }
+                }
+            }
+
+            private static void ImportFrameAs<TPixel>(ImageFrameCollection source, ImageFrameCollection destination, int index)
+                where TPixel : struct, IPixel<TPixel>
+            {
+                using (Image temp = source.CloneFrame(index))
+                {
+                    using (Image<TPixel> temp2 = temp.CloneAs<TPixel>())
+                    {
+                        destination.AddFrame(temp2.Frames.RootFrame);
+                    }
+                }
+            }
+
+            private static void CompareGifMetadata(ImageFrame a, ImageFrame b)
+            {
+                // TODO: all metadata classes should be equatable!
+
+                GifFrameMetadata aData = a.Metadata.GetFormatMetadata(GifFormat.Instance);
+                GifFrameMetadata bData = b.Metadata.GetFormatMetadata(GifFormat.Instance);
+
+                Assert.Equal(aData.DisposalMethod, bData.DisposalMethod);
+                Assert.Equal(aData.FrameDelay, bData.FrameDelay);
+                Assert.Equal(aData.ColorTableLength, bData.ColorTableLength);
+            }
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.cs b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.cs
new file mode 100644
index 0000000000..a29f45271b
--- /dev/null
+++ b/tests/ImageSharp.Tests/Image/ImageFrameCollectionTests.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Tests
+{
+    public abstract partial class ImageFrameCollectionTests : IDisposable
+    {
+        protected Image<Rgba32> Image { get; }
+        protected ImageFrameCollection<Rgba32> Collection { get; }
+
+        public ImageFrameCollectionTests()
+        {
+            // Needed to get English exception messages, which are checked in several tests.
+            System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("en-US");
+
+            this.Image = new Image<Rgba32>(10, 10);
+            this.Collection = new ImageFrameCollection<Rgba32>(this.Image, 10, 10, default(Rgba32));
+        }
+
+        public void Dispose()
+        {
+            this.Image.Dispose();
+            this.Collection.Dispose();
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/Image/ImageFramesCollectionTests.cs b/tests/ImageSharp.Tests/Image/ImageFramesCollectionTests.cs
deleted file mode 100644
index 3923970578..0000000000
--- a/tests/ImageSharp.Tests/Image/ImageFramesCollectionTests.cs
+++ /dev/null
@@ -1,331 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using SixLabors.ImageSharp.Advanced;
-using SixLabors.ImageSharp.PixelFormats;
-using Xunit;
-
-namespace SixLabors.ImageSharp.Tests
-{
-    public class ImageFramesCollectionTests : IDisposable
-    {
-        private Image<Rgba32> image;
-        private ImageFrameCollection<Rgba32> collection;
-
-        public ImageFramesCollectionTests()
-        {
-            // Needed to get English exception messages, which are checked in several tests.
-            System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("en-US");
-
-            this.image = new Image<Rgba32>(10, 10);
-            this.collection = new ImageFrameCollection<Rgba32>(this.image, 10, 10, default(Rgba32));
-        }
-
-        [Fact]
-        public void ImageFramesaLwaysHaveOneFrame()
-        {
-            Assert.Equal(1, this.collection.Count);
-        }
-
-        [Fact]
-        public void AddNewFrame_FramesMustHaveSameSize()
-        {
-            ArgumentException ex = Assert.Throws<ArgumentException>(() =>
-            {
-                this.collection.AddFrame(new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
-            });
-
-            Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
-        }
-
-        [Fact]
-        public void AddNewFrame_Frame_FramesNotBeNull()
-        {
-            ArgumentNullException ex = Assert.Throws<ArgumentNullException>(() =>
-            {
-                this.collection.AddFrame((ImageFrame<Rgba32>)null);
-            });
-
-            Assert.StartsWith("Value cannot be null.", ex.Message);
-        }
-
-        [Fact]
-        public void AddNewFrame_PixelBuffer_DataMustNotBeNull()
-        {
-            Rgba32[] data = null;
-
-            ArgumentNullException ex = Assert.Throws<ArgumentNullException>(() =>
-            {
-                this.collection.AddFrame(data);
-            });
-
-            Assert.StartsWith("Value cannot be null.", ex.Message);
-        }
-
-        [Fact]
-        public void AddNewFrame_PixelBuffer_BufferIncorrectSize()
-        {
-            ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(() =>
-            {
-                this.collection.AddFrame(new Rgba32[0]);
-            });
-
-            Assert.StartsWith("Value 0 must be greater than or equal to 100.", ex.Message);
-        }
-
-        [Fact]
-        public void InsertNewFrame_FramesMustHaveSameSize()
-        {
-            ArgumentException ex = Assert.Throws<ArgumentException>(() =>
-            {
-                this.collection.InsertFrame(1, new ImageFrame<Rgba32>(Configuration.Default, 1, 1));
-            });
-
-            Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
-        }
-
-        [Fact]
-        public void InsertNewFrame_FramesNotBeNull()
-        {
-            ArgumentNullException ex = Assert.Throws<ArgumentNullException>(() =>
-            {
-                this.collection.InsertFrame(1, null);
-            });
-
-            Assert.StartsWith("Value cannot be null.", ex.Message);
-        }
-
-        [Fact]
-        public void Constructor_FramesMustHaveSameSize()
-        {
-            ArgumentException ex = Assert.Throws<ArgumentException>(() =>
-            {
-                var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                    new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                    new ImageFrame<Rgba32>(Configuration.Default,1,1)
-                });
-            });
-
-            Assert.StartsWith("Frame must have the same dimensions as the image.", ex.Message);
-        }
-
-        [Fact]
-        public void RemoveAtFrame_ThrowIfRemovingLastFrame()
-        {
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                    new ImageFrame<Rgba32>(Configuration.Default,10,10)
-                });
-
-            InvalidOperationException ex = Assert.Throws<InvalidOperationException>(() =>
-            {
-                collection.RemoveFrame(0);
-            });
-            Assert.Equal("Cannot remove last frame.", ex.Message);
-        }
-
-        [Fact]
-        public void RemoveAtFrame_CanRemoveFrameZeroIfMultipleFramesExist()
-        {
-
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                    new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                    new ImageFrame<Rgba32>(Configuration.Default,10,10)
-                });
-
-            collection.RemoveFrame(0);
-            Assert.Equal(1, collection.Count);
-        }
-
-        [Fact]
-        public void RootFrameIsFrameAtIndexZero()
-        {
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                new ImageFrame<Rgba32>(Configuration.Default,10,10)
-            });
-
-            Assert.Equal(collection.RootFrame, collection[0]);
-        }
-
-        [Fact]
-        public void ConstructorPopulatesFrames()
-        {
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                new ImageFrame<Rgba32>(Configuration.Default,10,10)
-            });
-
-            Assert.Equal(2, collection.Count);
-        }
-
-        [Fact]
-        public void DisposeClearsCollection()
-        {
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                new ImageFrame<Rgba32>(Configuration.Default,10,10)
-            });
-
-            collection.Dispose();
-
-            Assert.Equal(0, collection.Count);
-        }
-
-        [Fact]
-        public void Dispose_DisposesAllInnerFrames()
-        {
-            var collection = new ImageFrameCollection<Rgba32>(this.image, new[] {
-                new ImageFrame<Rgba32>(Configuration.Default,10,10),
-                new ImageFrame<Rgba32>(Configuration.Default,10,10)
-            });
-
-            IPixelSource<Rgba32>[] framesSnapShot = collection.OfType<IPixelSource<Rgba32>>().ToArray();
-            collection.Dispose();
-
-            Assert.All(framesSnapShot, f =>
-            {
-                // the pixel source of the frame is null after its been disposed.
-                Assert.Null(f.PixelBuffer);
-            });
-        }
-
-        [Theory]
-        [WithTestPatternImages(10, 10, PixelTypes.Rgba32)]
-        public void CloneFrame<TPixel>(TestImageProvider<TPixel> provider)
-           where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> img = provider.GetImage())
-            {
-                img.Frames.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10));// add a frame anyway
-                using (Image<TPixel> cloned = img.Frames.CloneFrame(0))
-                {
-                    Assert.Equal(2, img.Frames.Count);
-                    cloned.ComparePixelBufferTo(img.GetPixelSpan());
-                }
-            }
-        }
-
-        [Theory]
-        [WithTestPatternImages(10, 10, PixelTypes.Rgba32)]
-        public void ExtractFrame<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> img = provider.GetImage())
-            {
-                var sourcePixelData = img.GetPixelSpan().ToArray();
-
-                img.Frames.AddFrame(new ImageFrame<TPixel>(Configuration.Default, 10, 10));
-                using (Image<TPixel> cloned = img.Frames.ExportFrame(0))
-                {
-                    Assert.Equal(1, img.Frames.Count);
-                    cloned.ComparePixelBufferTo(sourcePixelData);
-                }
-            }
-        }
-
-        [Fact]
-        public void CreateFrame_Default()
-        {
-            this.image.Frames.CreateFrame();
-
-            Assert.Equal(2, this.image.Frames.Count);
-            this.image.Frames[1].ComparePixelBufferTo(default(Rgba32));
-        }
-
-        [Fact]
-        public void CreateFrame_CustomFillColor()
-        {
-            this.image.Frames.CreateFrame(Rgba32.HotPink);
-
-            Assert.Equal(2, this.image.Frames.Count);
-            this.image.Frames[1].ComparePixelBufferTo(Rgba32.HotPink);
-        }
-
-        [Fact]
-        public void AddFrameFromPixelData()
-        {
-            var pixelData = this.image.Frames.RootFrame.GetPixelSpan().ToArray();
-            this.image.Frames.AddFrame(pixelData);
-            Assert.Equal(2, this.image.Frames.Count);
-        }
-
-        [Fact]
-        public void AddFrame_clones_sourceFrame()
-        {
-            var pixelData = this.image.Frames.RootFrame.GetPixelSpan().ToArray();
-            var otherFRame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
-            var addedFrame = this.image.Frames.AddFrame(otherFRame);
-            addedFrame.ComparePixelBufferTo(otherFRame.GetPixelSpan());
-            Assert.NotEqual(otherFRame, addedFrame);
-        }
-
-        [Fact]
-        public void InsertFrame_clones_sourceFrame()
-        {
-            var pixelData = this.image.Frames.RootFrame.GetPixelSpan().ToArray();
-            var otherFRame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
-            var addedFrame = this.image.Frames.InsertFrame(0, otherFRame);
-            addedFrame.ComparePixelBufferTo(otherFRame.GetPixelSpan());
-            Assert.NotEqual(otherFRame, addedFrame);
-        }
-
-        [Fact]
-        public void MoveFrame_LeavesFrmaeInCorrectLocation()
-        {
-            for (var i = 0; i < 9; i++)
-            {
-                this.image.Frames.CreateFrame();
-            }
-
-            var frame = this.image.Frames[4];
-            this.image.Frames.MoveFrame(4, 7);
-            var newIndex = this.image.Frames.IndexOf(frame);
-            Assert.Equal(7, newIndex);
-        }
-
-
-        [Fact]
-        public void IndexOf_ReturnsCorrectIndex()
-        {
-            for (var i = 0; i < 9; i++)
-            {
-                this.image.Frames.CreateFrame();
-            }
-
-            var frame = this.image.Frames[4];
-            var index = this.image.Frames.IndexOf(frame);
-            Assert.Equal(4, index);
-        }
-
-        [Fact]
-        public void Contains_TrueIfMember()
-        {
-            for (var i = 0; i < 9; i++)
-            {
-                this.image.Frames.CreateFrame();
-            }
-
-            var frame = this.image.Frames[4];
-            Assert.True(this.image.Frames.Contains(frame));
-        }
-
-        [Fact]
-        public void Contains_TFalseIfNoneMember()
-        {
-            for (var i = 0; i < 9; i++)
-            {
-                this.image.Frames.CreateFrame();
-            }
-
-            var frame = new ImageFrame<Rgba32>(Configuration.Default, 10, 10);
-            Assert.False(this.image.Frames.Contains(frame));
-        }
-
-        public void Dispose()
-        {
-            this.image.Dispose();
-            this.collection.Dispose();
-        }
-    }
-}
diff --git a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
index 406719ab4f..4f92f4007d 100644
--- a/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
+++ b/tests/ImageSharp.Tests/ImageSharp.Tests.csproj
@@ -2,6 +2,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+    <LangVersion>latest</LangVersion>
+    <DebugType Condition="$(codecov) != ''">full</DebugType>
+    <DebugType Condition="$(codecov) == ''">portable</DebugType>
+    <DebugSymbols>True</DebugSymbols>
+    <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
     <AssemblyName>SixLabors.ImageSharp.Tests</AssemblyName>
     <Platforms>AnyCPU;x64;x86</Platforms>
     <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.ReferenceImplementations.cs b/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.ReferenceImplementations.cs
new file mode 100644
index 0000000000..d03cfeee22
--- /dev/null
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.ReferenceImplementations.cs
@@ -0,0 +1,115 @@
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+// // Copyright (c) Six Labors and contributors.
+// // Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace SixLabors.ImageSharp.Tests.PixelFormats
+{
+    public abstract partial class PixelConverterTests
+    {
+        public static class ReferenceImplementations
+        {
+            public static Rgba32 MakeRgba32(byte r, byte g, byte b, byte a)
+            {
+                Rgba32 d = default;
+                d.R = r;
+                d.G = g;
+                d.B = b;
+                d.A = a;
+                return d;
+            }
+
+            public static Argb32 MakeArgb32(byte r, byte g, byte b, byte a)
+            {
+                Argb32 d = default;
+                d.R = r;
+                d.G = g;
+                d.B = b;
+                d.A = a;
+                return d;
+            }
+
+            public static Bgra32 MakeBgra32(byte r, byte g, byte b, byte a)
+            {
+                Bgra32 d = default;
+                d.R = r;
+                d.G = g;
+                d.B = b;
+                d.A = a;
+                return d;
+            }
+
+            internal static void To<TSourcePixel, TDestinationPixel>(
+                Configuration configuration,
+                ReadOnlySpan<TSourcePixel> sourcePixels,
+                Span<TDestinationPixel> destinationPixels)
+                where TSourcePixel : struct, IPixel<TSourcePixel> where TDestinationPixel : struct, IPixel<TDestinationPixel>
+            {
+                Guard.NotNull(configuration, nameof(configuration));
+                Guard.DestinationShouldNotBeTooShort(sourcePixels, destinationPixels, nameof(destinationPixels));
+
+                int count = sourcePixels.Length;
+                ref TSourcePixel sourceRef = ref MemoryMarshal.GetReference(sourcePixels);
+
+                if (typeof(TSourcePixel) == typeof(TDestinationPixel))
+                {
+                    Span<TSourcePixel> uniformDest =
+                        MemoryMarshal.Cast<TDestinationPixel, TSourcePixel>(destinationPixels);
+                    sourcePixels.CopyTo(uniformDest);
+                    return;
+                }
+
+                // Gray8 and Gray16 are special implementations of IPixel in that they do not conform to the
+                // standard RGBA colorspace format and must be converted from RGBA using the special ITU BT709 algorithm.
+                // One of the requirements of FromScaledVector4/ToScaledVector4 is that it unaware of this and
+                // packs/unpacks the pixel without and conversion so we employ custom methods do do this.
+                if (typeof(TDestinationPixel) == typeof(Gray16))
+                {
+                    ref Gray16 gray16Ref = ref MemoryMarshal.GetReference(
+                                               MemoryMarshal.Cast<TDestinationPixel, Gray16>(destinationPixels));
+                    for (int i = 0; i < count; i++)
+                    {
+                        ref TSourcePixel sp = ref Unsafe.Add(ref sourceRef, i);
+                        ref Gray16 dp = ref Unsafe.Add(ref gray16Ref, i);
+                        dp.ConvertFromRgbaScaledVector4(sp.ToScaledVector4());
+                    }
+
+                    return;
+                }
+
+                if (typeof(TDestinationPixel) == typeof(Gray8))
+                {
+                    ref Gray8 gray8Ref = ref MemoryMarshal.GetReference(
+                                             MemoryMarshal.Cast<TDestinationPixel, Gray8>(destinationPixels));
+                    for (int i = 0; i < count; i++)
+                    {
+                        ref TSourcePixel sp = ref Unsafe.Add(ref sourceRef, i);
+                        ref Gray8 dp = ref Unsafe.Add(ref gray8Ref, i);
+                        dp.ConvertFromRgbaScaledVector4(sp.ToScaledVector4());
+                    }
+
+                    return;
+                }
+
+                // Normal conversion
+                ref TDestinationPixel destRef = ref MemoryMarshal.GetReference(destinationPixels);
+                for (int i = 0; i < count; i++)
+                {
+                    ref TSourcePixel sp = ref Unsafe.Add(ref sourceRef, i);
+                    ref TDestinationPixel dp = ref Unsafe.Add(ref destRef, i);
+                    dp.FromScaledVector4(sp.ToScaledVector4());
+                }
+            }
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.cs
index c539e9dcf0..f1f56fcd46 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelConverterTests.cs
@@ -5,7 +5,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.PixelFormats
 {
-    public abstract class PixelConverterTests
+    public abstract partial class PixelConverterTests
     {
         public static readonly TheoryData<byte, byte, byte, byte> RgbaData =
             new TheoryData<byte, byte, byte, byte>
@@ -122,39 +122,5 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats
                 Assert.Equal(expectedPacked, actualPacked);
             }
         }
-
-
-        private static class ReferenceImplementations
-        {
-            public static Rgba32 MakeRgba32(byte r, byte g, byte b, byte a)
-            {
-                Rgba32 d = default;
-                d.R = r;
-                d.G = g;
-                d.B = b;
-                d.A = a;
-                return d;
-            }
-
-            public static Argb32 MakeArgb32(byte r, byte g, byte b, byte a)
-            {
-                Argb32 d = default;
-                d.R = r;
-                d.G = g;
-                d.B = b;
-                d.A = a;
-                return d;
-            }
-
-            public static Bgra32 MakeBgra32(byte r, byte g, byte b, byte a)
-            {
-                Bgra32 d = default;
-                d.R = r;
-                d.G = g;
-                d.B = b;
-                d.A = a;
-                return d;
-            }
-        }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgra5551OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgra5551OperationsTests.cs
new file mode 100644
index 0000000000..aa9b7bb1b8
--- /dev/null
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Bgra5551OperationsTests.cs
@@ -0,0 +1,20 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit.Abstractions;
+
+namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
+{
+    public partial class PixelOperationsTests
+    {
+        public class Bgra5551OperationsTests : PixelOperationsTests<Bgra5551>
+        {
+            public Bgra5551OperationsTests(ITestOutputHelper output)
+                : base(output)
+            {
+            }
+        }
+    }
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray16OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray16OperationsTests.cs
index c3de335470..f44401ae90 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray16OperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray16OperationsTests.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -25,90 +26,6 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             [Fact]
             public void IsSpecialImplementation() => Assert.IsType<Gray16.PixelOperations>(PixelOperations<Gray16>.Instance);
 
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void FromGray8Bytes(int count)
-            {
-                byte[] source = CreateByteTestData(count);
-                var expected = new Gray16[count];
-
-                for (int i = 0; i < count; i++)
-                {
-                    expected[i].FromGray8(new Gray8(source[i]));
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.FromGray8Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void ToGray8Bytes(int count)
-            {
-                Gray16[] source = CreatePixelTestData(count);
-                byte[] expected = new byte[count];
-                var gray = default(Gray8);
-
-                for (int i = 0; i < count; i++)
-                {
-                    gray.FromScaledVector4(source[i].ToScaledVector4());
-                    expected[i] = gray.PackedValue;
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.ToGray8Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void FromGray16Bytes(int count)
-            {
-                byte[] source = CreateByteTestData(count * 2);
-                Span<byte> sourceSpan = source.AsSpan();
-                var expected = new Gray16[count];
-
-                for (int i = 0; i < count; i++)
-                {
-                    int i2 = i * 2;
-                    expected[i].FromGray16(MemoryMarshal.Cast<byte, Gray16>(sourceSpan.Slice(i2, 2))[0]);
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.FromGray16Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void ToGray16Bytes(int count)
-            {
-                Gray16[] source = CreatePixelTestData(count);
-                byte[] expected = new byte[count * 2];
-                Gray16 gray = default;
-
-                for (int i = 0; i < count; i++)
-                {
-                    int i2 = i * 2;
-                    gray.FromScaledVector4(source[i].ToScaledVector4());
-                    OctetBytes bytes = Unsafe.As<Gray16, OctetBytes>(ref gray);
-                    expected[i2] = bytes[0];
-                    expected[i2 + 1] = bytes[1];
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.ToGray16Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray8OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray8OperationsTests.cs
index acd6ef23ac..30c4290006 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray8OperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Gray8OperationsTests.cs
@@ -24,91 +24,6 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
 
             [Fact]
             public void IsSpecialImplementation() => Assert.IsType<Gray8.PixelOperations>(PixelOperations<Gray8>.Instance);
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void FromGray8Bytes(int count)
-            {
-                byte[] source = CreateByteTestData(count);
-                var expected = new Gray8[count];
-
-                for (int i = 0; i < count; i++)
-                {
-                    expected[i].FromGray8(new Gray8(source[i]));
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.FromGray8Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void ToGray8Bytes(int count)
-            {
-                Gray8[] source = CreatePixelTestData(count);
-                byte[] expected = new byte[count];
-                var gray = default(Gray8);
-
-                for (int i = 0; i < count; i++)
-                {
-                    gray.FromScaledVector4(source[i].ToScaledVector4());
-                    expected[i] = gray.PackedValue;
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.ToGray8Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void FromGray16Bytes(int count)
-            {
-                byte[] source = CreateByteTestData(count * 2);
-                Span<byte> sourceSpan = source.AsSpan();
-                var expected = new Gray8[count];
-
-                for (int i = 0; i < count; i++)
-                {
-                    int i2 = i * 2;
-                    expected[i].FromGray16(MemoryMarshal.Cast<byte, Gray16>(sourceSpan.Slice(i2, 2))[0]);
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.FromGray16Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
-
-            [Theory]
-            [MemberData(nameof(ArraySizesData))]
-            public void ToGray16Bytes(int count)
-            {
-                Gray8[] source = CreatePixelTestData(count);
-                byte[] expected = new byte[count * 2];
-                Gray16 gray = default;
-
-                for (int i = 0; i < count; i++)
-                {
-                    int i2 = i * 2;
-                    gray.FromScaledVector4(source[i].ToScaledVector4());
-                    OctetBytes bytes = Unsafe.As<Gray16, OctetBytes>(ref gray);
-                    expected[i2] = bytes[0];
-                    expected[i2 + 1] = bytes[1];
-                }
-
-                TestOperation(
-                    source,
-                    expected,
-                    (s, d) => Operations.ToGray16Bytes(this.Configuration, s, d.GetSpan(), count)
-                );
-            }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
index 1c7d312d30..37793911a2 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.Rgb24OperationsTests.cs
@@ -21,4 +21,4 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             public void IsSpecialImplementation() => Assert.IsType<Rgb24.PixelOperations>(PixelOperations<Rgb24>.Instance);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
index d9ae9131ff..71adc17494 100644
--- a/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
+++ b/tests/ImageSharp.Tests/PixelFormats/PixelOperations/PixelOperationsTests.cs
@@ -3,12 +3,14 @@
 
 using System;
 using System.Buffers;
+using System.Linq;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.ColorSpaces.Companding;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Tests.Formats.Jpg.Utils;
 
 using Xunit;
 using Xunit.Abstractions;
@@ -245,7 +247,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
                 {
                     Vector4Utils.UnPremultiply(ref v);
                 }
-                
+
                 SRgbCompanding.Compress(ref v);
             }
 
@@ -277,6 +279,33 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             );
         }
 
+
+        public static readonly TheoryData<IPixel> Generic_To_Data = new TheoryData<IPixel>
+                                                    {
+                                                        default(Rgba32),
+                                                        default(Bgra32),
+                                                        default(Rgb24),
+                                                        default(Gray8),
+                                                        default(Gray16),
+                                                        default(Rgb48),
+                                                        default(Rgba64)
+                                                    };
+
+        [Theory]
+        [MemberData(nameof(Generic_To_Data))]
+        public void Generic_To<TDestPixel>(TDestPixel dummy)
+            where TDestPixel : struct, IPixel<TDestPixel>
+        {
+            const int Count = 2134;
+            TPixel[] source = CreatePixelTestData(Count);
+            TDestPixel[] expected = new TDestPixel[Count];
+
+            PixelConverterTests.ReferenceImplementations.To<TPixel, TDestPixel>(this.Configuration, source, expected);
+
+            TestOperation(source, expected, (s, d) => Operations.To(this.Configuration, (ReadOnlySpan<TPixel>)s, d.GetSpan()));
+        }
+
+
         [Theory]
         [MemberData(nameof(ArraySizesData))]
         public void ToScaledVector4(int count)
@@ -732,6 +761,92 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             );
         }
 
+
+            [Theory]
+            [MemberData(nameof(ArraySizesData))]
+            public void FromGray8(int count)
+            {
+                byte[] sourceBytes = CreateByteTestData(count);
+                Gray8[] source = sourceBytes.Select(b => new Gray8(b)).ToArray();
+                var expected = new TPixel[count];
+
+
+                for (int i = 0; i < count; i++)
+                {
+                    expected[i].FromGray8(source[i]);
+                }
+
+                TestOperation(
+                    source,
+                    expected,
+                    (s, d) => Operations.FromGray8(this.Configuration, s, d.GetSpan())
+                );
+            }
+
+            [Theory]
+            [MemberData(nameof(ArraySizesData))]
+            public void ToGray8(int count)
+            {
+                TPixel[] source = CreatePixelTestData(count);
+                Gray8[] expected = new Gray8[count];
+
+                for (int i = 0; i < count; i++)
+                {
+                    expected[i].FromScaledVector4(source[i].ToScaledVector4());
+                }
+
+                TestOperation(
+                    source,
+                    expected,
+                    (s, d) => Operations.ToGray8(this.Configuration, s, d.GetSpan())
+                );
+            }
+
+            [Theory]
+            [MemberData(nameof(ArraySizesData))]
+            public void FromGray16(int count)
+            {
+                Gray16[] source = CreateVector4TestData(count).Select(v =>
+                {
+                    Gray16 g = default;
+                    g.FromVector4(v);
+                    return g;
+                }).ToArray();
+
+                var expected = new TPixel[count];
+
+                for (int i = 0; i < count; i++)
+                {
+                    int i2 = i * 2;
+                    expected[i].FromGray16(source[i]);
+                }
+
+                TestOperation(
+                    source,
+                    expected,
+                    (s, d) => Operations.FromGray16(this.Configuration, s, d.GetSpan())
+                );
+            }
+
+            [Theory]
+            [MemberData(nameof(ArraySizesData))]
+            public void ToGray16(int count)
+            {
+                TPixel[] source = CreatePixelTestData(count);
+                Gray16[] expected = new Gray16[count];
+
+                for (int i = 0; i < count; i++)
+                {
+                    expected[i].FromScaledVector4(source[i].ToScaledVector4());
+                }
+
+                TestOperation(
+                    source,
+                    expected,
+                    (s, d) => Operations.ToGray16(this.Configuration, s, d.GetSpan())
+                );
+            }
+
         public delegate void RefAction<T1>(ref T1 arg1);
 
         internal static Vector4[] CreateExpectedVector4Data(TPixel[] source, RefAction<Vector4> vectorModifier = null)
@@ -903,6 +1018,18 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
                         // ReSharper restore PossibleNullReferenceException
                     }
                 }
+                else if (typeof(TDest) == typeof(Gray16))
+                {
+                    // Minor difference is tolerated for 16 bit pixel values
+                    Span<Gray16> expected = MemoryMarshal.Cast<TDest, Gray16>(this.ExpectedDestBuffer.AsSpan());
+                    Span<Gray16> actual = MemoryMarshal.Cast<TDest, Gray16>(this.ActualDestBuffer.GetSpan());
+
+                    for (int i = 0; i < count; i++)
+                    {
+                        int difference = expected[i].PackedValue - actual[i].PackedValue;
+                        Assert.True(Math.Abs(difference) < 2);
+                    }
+                }
                 else
                 {
                     Span<TDest> expected = this.ExpectedDestBuffer.AsSpan();
@@ -915,4 +1042,4 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations
             }
         }
     }
-}
\ No newline at end of file
+}