Add tests, fix bugs

src/ImageSharp/Colors/ColorVector.cs

@@ -218,9 +218,10 @@ namespace ImageSharp
         /// <returns>A hexadecimal string representation of the value.</returns>
         public string ToHex()
         {
+            // Hex is RRGGBBAA
             Vector4 vector = this.backingVector * MaxBytes;
             vector += Half;
-            uint hexOrder = (uint)((byte)vector.X | (byte)vector.Y << 8 | (byte)vector.Z << 16 | (byte)vector.W << 24);
+            uint hexOrder = (uint)((byte)vector.W | (byte)vector.Z << 8 | (byte)vector.Y << 16 | (byte)vector.X << 24);
             return hexOrder.ToString("X8");
         }
 
@@ -244,7 +245,7 @@ namespace ImageSharp
             bytes[startIndex] = (byte)vector.X;
             bytes[startIndex + 1] = (byte)vector.Y;
             bytes[startIndex + 2] = (byte)vector.Z;
-            bytes[startIndex + 2] = (byte)vector.W;
+            bytes[startIndex + 3] = (byte)vector.W;
         }
 
         /// <inheritdoc/>
@@ -267,7 +268,7 @@ namespace ImageSharp
             bytes[startIndex] = (byte)vector.Z;
             bytes[startIndex + 1] = (byte)vector.Y;
             bytes[startIndex + 2] = (byte)vector.X;
-            bytes[startIndex + 2] = (byte)vector.W;
+            bytes[startIndex + 3] = (byte)vector.W;
         }
 
         /// <inheritdoc/>

tests/ImageSharp.Tests/Colors/ColorEqualityTests.cs

@@ -33,6 +33,7 @@ namespace ImageSharp.Tests.Colors
                { new NormalizedShort4(Vector4.One), new NormalizedShort4(Vector4.One), typeof(NormalizedShort4) },
                { new Rg32(Vector2.One), new Rg32(Vector2.One), typeof(Rg32) },
                { new Rgba1010102(Vector4.One), new Rgba1010102(Vector4.One), typeof(Rgba1010102) },
+               { new Rgba32(Vector4.One), new Rgba32(Vector4.One), typeof(Rgba32) },
                { new Rgba64(Vector4.One), new Rgba64(Vector4.One), typeof(Rgba64) },
                { new Short2(Vector2.One * 0x7FFF), new Short2(Vector2.One * 0x7FFF), typeof(Short2) },
                { new Short4(Vector4.One * 0x7FFF), new Short4(Vector4.One * 0x7FFF), typeof(Short4) },
@@ -144,6 +145,7 @@ namespace ImageSharp.Tests.Colors
                 { new NormalizedShort4(Vector4.One), new NormalizedShort4(Vector4.Zero), typeof(NormalizedShort4) },
                 { new Rg32(Vector2.One), new Rg32(Vector2.Zero), typeof(Rg32) },
                 { new Rgba1010102(Vector4.One), new Rgba1010102(Vector4.Zero), typeof(Rgba1010102) },
+                { new Rgba32(Vector4.One), new Rgba32(Vector4.Zero), typeof(Rgba32) },
                 { new Rgba64(Vector4.One), new Rgba64(Vector4.Zero), typeof(Rgba64) },
                 { new Short2(Vector2.One * 0x7FFF), new Short2(Vector2.Zero), typeof(Short2) },
                 { new Short4(Vector4.One * 0x7FFF), new Short4(Vector4.Zero), typeof(Short4) },
@@ -289,10 +291,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(EqualityDataColorSpaces))]
         public void EqualityObject(object first, object second, Type type)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 
@@ -308,10 +310,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(NotEqualityDataColorSpaces))]
         public void NotEqualityObject(object first, object second, Type type)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 
@@ -327,10 +329,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(EqualityDataColorSpaces))]
         public void EqualityOperator(object first, object second, Type type)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 
@@ -346,10 +348,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(NotEqualityDataColorSpaces))]
         public void NotEqualityOperator(object first, object second, Type type)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 
@@ -364,10 +366,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(AlmostEqualsData))]
         public void AlmostEquals(object first, object second, Type type, float precision)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 
@@ -382,10 +384,10 @@ namespace ImageSharp.Tests.Colors
         [MemberData(nameof(AlmostNotEqualsData))]
         public void AlmostNotEquals(object first, object second, Type type, float precision)
         {
-            // Arrange 
+            // Arrange
-            // Cast to the known object types, this is so that we can hit the 
+            // Cast to the known object types, this is so that we can hit the
-            // equality operator on the concrete type, otherwise it goes to the 
+            // equality operator on the concrete type, otherwise it goes to the
-            // default "object" one :) 
+            // default "object" one :)
             dynamic firstObject = Convert.ChangeType(first, type);
             dynamic secondObject = Convert.ChangeType(second, type);
 

tests/ImageSharp.Tests/Colors/PackedPixelTests.cs

@@ -711,6 +711,51 @@ namespace ImageSharp.Tests.Colors
             Assert.Equal(rgba, new byte[] { 25, 0, 128, 0 });
         }
 
+        [Fact]
+        public void Rgba32()
+        {
+            // Test the limits.
+            Assert.Equal((uint)0x0, new Rgba32(Vector4.Zero).PackedValue);
+            Assert.Equal(0xFFFFFFFF, new Rgba32(Vector4.One).PackedValue);
+
+            // Test ToVector4.
+            Assert.True(Equal(Vector4.One, new Rgba32(Vector4.One).ToVector4()));
+            Assert.True(Equal(Vector4.Zero, new Rgba32(Vector4.Zero).ToVector4()));
+            Assert.True(Equal(Vector4.UnitX, new Rgba32(Vector4.UnitX).ToVector4()));
+            Assert.True(Equal(Vector4.UnitY, new Rgba32(Vector4.UnitY).ToVector4()));
+            Assert.True(Equal(Vector4.UnitZ, new Rgba32(Vector4.UnitZ).ToVector4()));
+            Assert.True(Equal(Vector4.UnitW, new Rgba32(Vector4.UnitW).ToVector4()));
+
+            // Test clamping.
+            Assert.True(Equal(Vector4.Zero, new Rgba32(Vector4.One * -1234.0f).ToVector4()));
+            Assert.True(Equal(Vector4.One, new Rgba32(Vector4.One * +1234.0f).ToVector4()));
+
+            float x = +0.1f;
+            float y = -0.3f;
+            float z = +0.5f;
+            float w = -0.7f;
+            Rgba32 rgba32 = new Rgba32(x, y, z, w);
+            Assert.Equal(0x80001Au, rgba32.PackedValue);
+
+            // Test ordering
+            byte[] rgb = new byte[3];
+            byte[] rgba = new byte[4];
+            byte[] bgr = new byte[3];
+            byte[] bgra = new byte[4];
+
+            rgba32.ToXyzBytes(rgb, 0);
+            Assert.Equal(rgb, new byte[] { 0x1a, 0, 0x80 });
+
+            rgba32.ToXyzwBytes(rgba, 0);
+            Assert.Equal(rgba, new byte[] { 0x1a, 0, 0x80, 0 });
+
+            rgba32.ToZyxBytes(bgr, 0);
+            Assert.Equal(bgr, new byte[] { 0x80, 0, 0x1a });
+
+            rgba32.ToZyxwBytes(bgra, 0);
+            Assert.Equal(bgra, new byte[] { 0x80, 0, 0x1a, 0 });
+        }
+
         [Fact]
         public void Rgba64()
         {

tests/ImageSharp.Tests/Colors/UnPackedPixelTests.cs

@@ -0,0 +1,148 @@
+namespace ImageSharp.Tests.Colors
+{
+    using System.Numerics;
+
+    using Xunit;
+
+    public class UnPackedPixelTests
+    {
+        [Fact]
+        public void Color_Types_From_Bytes_Produce_Equal_Scaled_Component_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            Assert.Equal(color.R, (byte)(colorVector.R * 255));
+            Assert.Equal(color.G, (byte)(colorVector.G * 255));
+            Assert.Equal(color.B, (byte)(colorVector.B * 255));
+            Assert.Equal(color.A, (byte)(colorVector.A * 255));
+        }
+
+        [Fact]
+        public void Color_Types_From_Floats_Produce_Equal_Scaled_Component_OutPut()
+        {
+            Color color = new Color(24 / 255F, 48 / 255F, 96 / 255F, 192 / 255F);
+            ColorVector colorVector = new ColorVector(24 / 255F, 48 / 255F, 96 / 255F, 192 / 255F);
+
+            Assert.Equal(color.R, (byte)(colorVector.R * 255));
+            Assert.Equal(color.G, (byte)(colorVector.G * 255));
+            Assert.Equal(color.B, (byte)(colorVector.B * 255));
+            Assert.Equal(color.A, (byte)(colorVector.A * 255));
+        }
+
+        [Fact]
+        public void Color_Types_From_Vector4_Produce_Equal_Scaled_Component_OutPut()
+        {
+            Color color = new Color(new Vector4(24 / 255F, 48 / 255F, 96 / 255F, 192 / 255F));
+            ColorVector colorVector = new ColorVector(new Vector4(24 / 255F, 48 / 255F, 96 / 255F, 192 / 255F));
+
+            Assert.Equal(color.R, (byte)(colorVector.R * 255));
+            Assert.Equal(color.G, (byte)(colorVector.G * 255));
+            Assert.Equal(color.B, (byte)(colorVector.B * 255));
+            Assert.Equal(color.A, (byte)(colorVector.A * 255));
+        }
+
+        [Fact]
+        public void Color_Types_From_Vector3_Produce_Equal_Scaled_Component_OutPut()
+        {
+            Color color = new Color(new Vector3(24 / 255F, 48 / 255F, 96 / 255F));
+            ColorVector colorVector = new ColorVector(new Vector3(24 / 255F, 48 / 255F, 96 / 255F));
+
+            Assert.Equal(color.R, (byte)(colorVector.R * 255));
+            Assert.Equal(color.G, (byte)(colorVector.G * 255));
+            Assert.Equal(color.B, (byte)(colorVector.B * 255));
+            Assert.Equal(color.A, (byte)(colorVector.A * 255));
+        }
+
+        [Fact]
+        public void Color_Types_From_Hex_Produce_Equal_Scaled_Component_OutPut()
+        {
+            Color color = Color.FromHex("183060C0");
+            ColorVector colorVector = ColorVector.FromHex("183060C0");
+
+            Assert.Equal(color.R, (byte)(colorVector.R * 255));
+            Assert.Equal(color.G, (byte)(colorVector.G * 255));
+            Assert.Equal(color.B, (byte)(colorVector.B * 255));
+            Assert.Equal(color.A, (byte)(colorVector.A * 255));
+        }
+
+        [Fact]
+        public void Color_Types_To_Vector4_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            Assert.Equal(color.ToVector4(), colorVector.ToVector4());
+        }
+
+        [Fact]
+        public void Color_Types_To_RgbBytes_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            byte[] rgb = new byte[3];
+            byte[] rgbVector = new byte[3];
+
+            color.ToXyzBytes(rgb, 0);
+            colorVector.ToXyzBytes(rgbVector, 0);
+
+            Assert.Equal(rgb, rgbVector);
+        }
+
+        [Fact]
+        public void Color_Types_To_RgbaBytes_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            byte[] rgba = new byte[4];
+            byte[] rgbaVector = new byte[4];
+
+            color.ToXyzwBytes(rgba, 0);
+            colorVector.ToXyzwBytes(rgbaVector, 0);
+
+            Assert.Equal(rgba, rgbaVector);
+        }
+
+        [Fact]
+        public void Color_Types_To_BgrBytes_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            byte[] bgr = new byte[3];
+            byte[] bgrVector = new byte[3];
+
+            color.ToZyxBytes(bgr, 0);
+            colorVector.ToZyxBytes(bgrVector, 0);
+
+            Assert.Equal(bgr, bgrVector);
+        }
+
+        [Fact]
+        public void Color_Types_To_BgraBytes_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            byte[] bgra = new byte[4];
+            byte[] bgraVector = new byte[4];
+
+            color.ToZyxwBytes(bgra, 0);
+            colorVector.ToZyxwBytes(bgraVector, 0);
+
+            Assert.Equal(bgra, bgraVector);
+        }
+
+        [Fact]
+        public void Color_Types_To_Hex_Produce_Equal_OutPut()
+        {
+            Color color = new Color(24, 48, 96, 192);
+            ColorVector colorVector = new ColorVector(24, 48, 96, 192);
+
+            // 183060C0
+            Assert.Equal(color.ToHex(), colorVector.ToHex());
+        }
+    }
+}