From 4cfe946cf8ce988934a62ea706aeea44b55d8741 Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 11:07:32 +0200
Subject: [PATCH 1/6] Fixing namespace for Color spaces.

---
 src/ImageSharp/Colors/ColorspaceTransforms.cs                   | 1 +
 src/ImageSharp/Colors/{Colorspaces => Spaces}/Bgra32.cs         | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/CieLab.cs         | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/CieXyz.cs         | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/Cmyk.cs           | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/Hsl.cs            | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/Hsv.cs            | 2 +-
 .../Colors/{Colorspaces => Spaces}/IAlmostEquatable.cs          | 2 +-
 src/ImageSharp/Colors/{Colorspaces => Spaces}/YCbCr.cs          | 2 +-
 tests/ImageSharp.Tests/Colors/ColorConversionTests.cs           | 2 +-
 10 files changed, 10 insertions(+), 9 deletions(-)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/Bgra32.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/CieLab.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/CieXyz.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/Cmyk.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/Hsl.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/Hsv.cs (99%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/IAlmostEquatable.cs (97%)
 rename src/ImageSharp/Colors/{Colorspaces => Spaces}/YCbCr.cs (99%)

diff --git a/src/ImageSharp/Colors/ColorspaceTransforms.cs b/src/ImageSharp/Colors/ColorspaceTransforms.cs
index 0c70dd98b1..7315b9e9d2 100644
--- a/src/ImageSharp/Colors/ColorspaceTransforms.cs
+++ b/src/ImageSharp/Colors/ColorspaceTransforms.cs
@@ -7,6 +7,7 @@ namespace ImageSharp
 {
     using System;
     using System.Numerics;
+    using Colors.Spaces;
 
     /// <summary>
     /// Packed vector type containing four 8-bit unsigned normalized values ranging from 0 to 255.
diff --git a/src/ImageSharp/Colors/Colorspaces/Bgra32.cs b/src/ImageSharp/Colors/Spaces/Bgra32.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/Bgra32.cs
rename to src/ImageSharp/Colors/Spaces/Bgra32.cs
index ff9203b03a..e590b9e388 100644
--- a/src/ImageSharp/Colors/Colorspaces/Bgra32.cs
+++ b/src/ImageSharp/Colors/Spaces/Bgra32.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/CieLab.cs b/src/ImageSharp/Colors/Spaces/CieLab.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/CieLab.cs
rename to src/ImageSharp/Colors/Spaces/CieLab.cs
index e3300f3b87..78aa0dc70d 100644
--- a/src/ImageSharp/Colors/Colorspaces/CieLab.cs
+++ b/src/ImageSharp/Colors/Spaces/CieLab.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/CieXyz.cs b/src/ImageSharp/Colors/Spaces/CieXyz.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/CieXyz.cs
rename to src/ImageSharp/Colors/Spaces/CieXyz.cs
index 16d5cb8275..3a8704171d 100644
--- a/src/ImageSharp/Colors/Colorspaces/CieXyz.cs
+++ b/src/ImageSharp/Colors/Spaces/CieXyz.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/Cmyk.cs b/src/ImageSharp/Colors/Spaces/Cmyk.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/Cmyk.cs
rename to src/ImageSharp/Colors/Spaces/Cmyk.cs
index 15bea263cc..9e0f10898b 100644
--- a/src/ImageSharp/Colors/Colorspaces/Cmyk.cs
+++ b/src/ImageSharp/Colors/Spaces/Cmyk.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/Hsl.cs b/src/ImageSharp/Colors/Spaces/Hsl.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/Hsl.cs
rename to src/ImageSharp/Colors/Spaces/Hsl.cs
index 1cc54ec8c3..8c1d293021 100644
--- a/src/ImageSharp/Colors/Colorspaces/Hsl.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsl.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/Hsv.cs b/src/ImageSharp/Colors/Spaces/Hsv.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/Hsv.cs
rename to src/ImageSharp/Colors/Spaces/Hsv.cs
index b55e07e6bd..eebf034ce9 100644
--- a/src/ImageSharp/Colors/Colorspaces/Hsv.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsv.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/src/ImageSharp/Colors/Colorspaces/IAlmostEquatable.cs b/src/ImageSharp/Colors/Spaces/IAlmostEquatable.cs
similarity index 97%
rename from src/ImageSharp/Colors/Colorspaces/IAlmostEquatable.cs
rename to src/ImageSharp/Colors/Spaces/IAlmostEquatable.cs
index 1163657edb..a2183d396c 100644
--- a/src/ImageSharp/Colors/Colorspaces/IAlmostEquatable.cs
+++ b/src/ImageSharp/Colors/Spaces/IAlmostEquatable.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
 
diff --git a/src/ImageSharp/Colors/Colorspaces/YCbCr.cs b/src/ImageSharp/Colors/Spaces/YCbCr.cs
similarity index 99%
rename from src/ImageSharp/Colors/Colorspaces/YCbCr.cs
rename to src/ImageSharp/Colors/Spaces/YCbCr.cs
index c9a0872c51..8d94ebccaf 100644
--- a/src/ImageSharp/Colors/Colorspaces/YCbCr.cs
+++ b/src/ImageSharp/Colors/Spaces/YCbCr.cs
@@ -3,7 +3,7 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-namespace ImageSharp
+namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
diff --git a/tests/ImageSharp.Tests/Colors/ColorConversionTests.cs b/tests/ImageSharp.Tests/Colors/ColorConversionTests.cs
index f1b6d5f9b5..4884557522 100644
--- a/tests/ImageSharp.Tests/Colors/ColorConversionTests.cs
+++ b/tests/ImageSharp.Tests/Colors/ColorConversionTests.cs
@@ -7,7 +7,7 @@ namespace ImageSharp.Tests
 {
     using System;
     using System.Diagnostics.CodeAnalysis;
-
+    using ImageSharp.Colors.Spaces;
     using Xunit;
 
     /// <summary>

From 6fcd81158fa825787d28b3de9e9837d503c8b846 Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 12:42:37 +0200
Subject: [PATCH 2/6] Adding backing vector3 to YCbCr.

---
 src/ImageSharp/Colors/ColorspaceTransforms.cs | 12 +++---
 src/ImageSharp/Colors/Spaces/YCbCr.cs         | 37 ++++++++++++-------
 2 files changed, 29 insertions(+), 20 deletions(-)

diff --git a/src/ImageSharp/Colors/ColorspaceTransforms.cs b/src/ImageSharp/Colors/ColorspaceTransforms.cs
index 7315b9e9d2..3994e2407b 100644
--- a/src/ImageSharp/Colors/ColorspaceTransforms.cs
+++ b/src/ImageSharp/Colors/ColorspaceTransforms.cs
@@ -63,13 +63,13 @@ namespace ImageSharp
         /// </returns>
         public static implicit operator Color(YCbCr color)
         {
-            byte y = color.Y;
-            int cb = color.Cb - 128;
-            int cr = color.Cr - 128;
+            float y = color.Y;
+            float cb = color.Cb - 128;
+            float cr = color.Cr - 128;
 
-            byte r = (byte)(y + (1.402F * cr)).Clamp(0, 255);
-            byte g = (byte)(y - (0.34414F * cb) - (0.71414F * cr)).Clamp(0, 255);
-            byte b = (byte)(y + (1.772F * cb)).Clamp(0, 255);
+            float r = (y + (1.402F * cr)).Clamp(0, 255);
+            float g = (y - (0.34414F * cb) - (0.71414F * cr)).Clamp(0, 255);
+            float b = (y + (1.772F * cb)).Clamp(0, 255);
 
             return new Color(r, g, b);
         }
diff --git a/src/ImageSharp/Colors/Spaces/YCbCr.cs b/src/ImageSharp/Colors/Spaces/YCbCr.cs
index 8d94ebccaf..ada36c831e 100644
--- a/src/ImageSharp/Colors/Spaces/YCbCr.cs
+++ b/src/ImageSharp/Colors/Spaces/YCbCr.cs
@@ -7,6 +7,7 @@ namespace ImageSharp.Colors.Spaces
 {
     using System;
     using System.ComponentModel;
+    using System.Numerics;
 
     /// <summary>
     /// Represents an YCbCr (luminance, blue chroma, red chroma) color conforming to the full range standard used in digital imaging systems.
@@ -19,6 +20,11 @@ namespace ImageSharp.Colors.Spaces
         /// </summary>
         public static readonly YCbCr Empty = default(YCbCr);
 
+        /// <summary>
+        /// The backing vector for SIMD support.
+        /// </summary>
+        private Vector3 backingVector;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="YCbCr"/> struct.
         /// </summary>
@@ -28,28 +34,26 @@ namespace ImageSharp.Colors.Spaces
         public YCbCr(byte y, byte cb, byte cr)
             : this()
         {
-            this.Y = y;
-            this.Cb = cb;
-            this.Cr = cr;
+            this.backingVector = Vector3.Clamp(new Vector3(y, cb, cr), Vector3.Zero, new Vector3(255));
         }
 
         /// <summary>
         /// Gets the Y luminance component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public byte Y { get; }
+        public float Y => this.backingVector.X;
 
         /// <summary>
         /// Gets the Cb chroma component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public byte Cb { get; }
+        public float Cb => this.backingVector.Y;
 
         /// <summary>
         /// Gets the Cr chroma component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public byte Cr { get; }
+        public float Cr => this.backingVector.Z;
 
         /// <summary>
         /// Gets a value indicating whether this <see cref="YCbCr"/> is empty.
@@ -117,13 +121,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Y.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Cb.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Cr.GetHashCode();
-                return hashCode;
-            }
+            return GetHashCode(this);
         }
 
         /// <inheritdoc/>
@@ -151,7 +149,18 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public bool Equals(YCbCr other)
         {
-            return this.Y == other.Y && this.Cb == other.Cb && this.Cr == other.Cr;
+            return this.backingVector.Equals(other.backingVector);
         }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <param name="color">
+        /// The instance of <see cref="YCbCr"/> to return the hash code for.
+        /// </param>
+        /// <returns>
+        /// A 32-bit signed integer that is the hash code for this instance.
+        /// </returns>
+        private static int GetHashCode(YCbCr color) => color.backingVector.GetHashCode();
     }
 }
\ No newline at end of file

From 51cee78385053a678bbfdee838be14cef4848e7d Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 12:46:36 +0200
Subject: [PATCH 3/6] Fixing conversion.

---
 src/ImageSharp/Colors/ColorspaceTransforms.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp/Colors/ColorspaceTransforms.cs b/src/ImageSharp/Colors/ColorspaceTransforms.cs
index 3994e2407b..9785a888f4 100644
--- a/src/ImageSharp/Colors/ColorspaceTransforms.cs
+++ b/src/ImageSharp/Colors/ColorspaceTransforms.cs
@@ -67,9 +67,9 @@ namespace ImageSharp
             float cb = color.Cb - 128;
             float cr = color.Cr - 128;
 
-            float r = (y + (1.402F * cr)).Clamp(0, 255);
-            float g = (y - (0.34414F * cb) - (0.71414F * cr)).Clamp(0, 255);
-            float b = (y + (1.772F * cb)).Clamp(0, 255);
+            byte r = (byte)(y + (1.402F * cr)).Clamp(0, 255);
+            byte g = (byte)(y - (0.34414F * cb) - (0.71414F * cr)).Clamp(0, 255);
+            byte b = (byte)(y + (1.772F * cb)).Clamp(0, 255);
 
             return new Color(r, g, b);
         }

From cdaf4d869b4077147f93f170f414e11d1066b581 Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 13:26:07 +0200
Subject: [PATCH 4/6] Removing unnecessary GetHashCode indirection.

---
 src/ImageSharp/Colors/Spaces/Bgra32.cs | 13 +------------
 src/ImageSharp/Colors/Spaces/CieLab.cs | 13 +------------
 src/ImageSharp/Colors/Spaces/CieXyz.cs | 13 +------------
 src/ImageSharp/Colors/Spaces/Cmyk.cs   | 13 +------------
 src/ImageSharp/Colors/Spaces/Hsl.cs    | 13 +------------
 src/ImageSharp/Colors/Spaces/Hsv.cs    | 13 +------------
 src/ImageSharp/Colors/Spaces/YCbCr.cs  | 13 +------------
 7 files changed, 7 insertions(+), 84 deletions(-)

diff --git a/src/ImageSharp/Colors/Spaces/Bgra32.cs b/src/ImageSharp/Colors/Spaces/Bgra32.cs
index e590b9e388..4325b1cd64 100644
--- a/src/ImageSharp/Colors/Spaces/Bgra32.cs
+++ b/src/ImageSharp/Colors/Spaces/Bgra32.cs
@@ -133,7 +133,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -152,16 +152,5 @@ namespace ImageSharp.Colors.Spaces
         {
             return this.backingVector.Equals(other.backingVector);
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="Bgra32"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(Bgra32 color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/CieLab.cs b/src/ImageSharp/Colors/Spaces/CieLab.cs
index 78aa0dc70d..505c7a6905 100644
--- a/src/ImageSharp/Colors/Spaces/CieLab.cs
+++ b/src/ImageSharp/Colors/Spaces/CieLab.cs
@@ -138,7 +138,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -178,16 +178,5 @@ namespace ImageSharp.Colors.Spaces
                 && result.Y < precision
                 && result.Z < precision;
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="CieLab"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(CieLab color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/CieXyz.cs b/src/ImageSharp/Colors/Spaces/CieXyz.cs
index 3a8704171d..2dd063163a 100644
--- a/src/ImageSharp/Colors/Spaces/CieXyz.cs
+++ b/src/ImageSharp/Colors/Spaces/CieXyz.cs
@@ -129,7 +129,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -169,16 +169,5 @@ namespace ImageSharp.Colors.Spaces
                 && result.Y < precision
                 && result.Z < precision;
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="Hsv"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(CieXyz color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/Cmyk.cs b/src/ImageSharp/Colors/Spaces/Cmyk.cs
index 9e0f10898b..48bd5c83a0 100644
--- a/src/ImageSharp/Colors/Spaces/Cmyk.cs
+++ b/src/ImageSharp/Colors/Spaces/Cmyk.cs
@@ -139,7 +139,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -180,16 +180,5 @@ namespace ImageSharp.Colors.Spaces
                 && result.Z < precision
                 && result.W < precision;
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="Cmyk"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(Cmyk color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/Hsl.cs b/src/ImageSharp/Colors/Spaces/Hsl.cs
index 8c1d293021..67a0ef094e 100644
--- a/src/ImageSharp/Colors/Spaces/Hsl.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsl.cs
@@ -158,7 +158,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -198,16 +198,5 @@ namespace ImageSharp.Colors.Spaces
                 && result.Y < precision
                 && result.Z < precision;
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="Hsl"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(Hsl color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/Hsv.cs b/src/ImageSharp/Colors/Spaces/Hsv.cs
index eebf034ce9..4cd382e782 100644
--- a/src/ImageSharp/Colors/Spaces/Hsv.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsv.cs
@@ -151,7 +151,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -191,16 +191,5 @@ namespace ImageSharp.Colors.Spaces
                 && result.Y < precision
                 && result.Z < precision;
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="Hsv"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(Hsv color) => color.backingVector.GetHashCode();
     }
 }
diff --git a/src/ImageSharp/Colors/Spaces/YCbCr.cs b/src/ImageSharp/Colors/Spaces/YCbCr.cs
index ada36c831e..a91fdb2d67 100644
--- a/src/ImageSharp/Colors/Spaces/YCbCr.cs
+++ b/src/ImageSharp/Colors/Spaces/YCbCr.cs
@@ -121,7 +121,7 @@ namespace ImageSharp.Colors.Spaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return GetHashCode(this);
+            return this.backingVector.GetHashCode();
         }
 
         /// <inheritdoc/>
@@ -151,16 +151,5 @@ namespace ImageSharp.Colors.Spaces
         {
             return this.backingVector.Equals(other.backingVector);
         }
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="color">
-        /// The instance of <see cref="YCbCr"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private static int GetHashCode(YCbCr color) => color.backingVector.GetHashCode();
     }
 }
\ No newline at end of file

From cb8dc38dd6953ad4816a35c7b47ac0b18a7f4824 Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 13:36:12 +0200
Subject: [PATCH 5/6] Making backing vectors readonly.

---
 src/ImageSharp/Colors/Spaces/Bgra32.cs | 2 +-
 src/ImageSharp/Colors/Spaces/CieLab.cs | 2 +-
 src/ImageSharp/Colors/Spaces/CieXyz.cs | 2 +-
 src/ImageSharp/Colors/Spaces/Cmyk.cs   | 2 +-
 src/ImageSharp/Colors/Spaces/Hsl.cs    | 2 +-
 src/ImageSharp/Colors/Spaces/Hsv.cs    | 2 +-
 src/ImageSharp/Colors/Spaces/YCbCr.cs  | 2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/ImageSharp/Colors/Spaces/Bgra32.cs b/src/ImageSharp/Colors/Spaces/Bgra32.cs
index 4325b1cd64..09475f42c8 100644
--- a/src/ImageSharp/Colors/Spaces/Bgra32.cs
+++ b/src/ImageSharp/Colors/Spaces/Bgra32.cs
@@ -22,7 +22,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector4 backingVector;
+        private readonly Vector4 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Bgra32"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/CieLab.cs b/src/ImageSharp/Colors/Spaces/CieLab.cs
index 505c7a6905..faa6c24724 100644
--- a/src/ImageSharp/Colors/Spaces/CieLab.cs
+++ b/src/ImageSharp/Colors/Spaces/CieLab.cs
@@ -28,7 +28,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector3 backingVector;
+        private readonly Vector3 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="CieLab"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/CieXyz.cs b/src/ImageSharp/Colors/Spaces/CieXyz.cs
index 2dd063163a..9deffe0669 100644
--- a/src/ImageSharp/Colors/Spaces/CieXyz.cs
+++ b/src/ImageSharp/Colors/Spaces/CieXyz.cs
@@ -28,7 +28,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector3 backingVector;
+        private readonly Vector3 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="CieXyz"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/Cmyk.cs b/src/ImageSharp/Colors/Spaces/Cmyk.cs
index 48bd5c83a0..e8f2a41f5c 100644
--- a/src/ImageSharp/Colors/Spaces/Cmyk.cs
+++ b/src/ImageSharp/Colors/Spaces/Cmyk.cs
@@ -27,7 +27,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector4 backingVector;
+        private readonly Vector4 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Cmyk"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/Hsl.cs b/src/ImageSharp/Colors/Spaces/Hsl.cs
index 67a0ef094e..5c478ecf14 100644
--- a/src/ImageSharp/Colors/Spaces/Hsl.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsl.cs
@@ -27,7 +27,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector3 backingVector;
+        private readonly Vector3 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Hsl"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/Hsv.cs b/src/ImageSharp/Colors/Spaces/Hsv.cs
index 4cd382e782..9df16a27b4 100644
--- a/src/ImageSharp/Colors/Spaces/Hsv.cs
+++ b/src/ImageSharp/Colors/Spaces/Hsv.cs
@@ -27,7 +27,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector3 backingVector;
+        private readonly Vector3 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Hsv"/> struct.
diff --git a/src/ImageSharp/Colors/Spaces/YCbCr.cs b/src/ImageSharp/Colors/Spaces/YCbCr.cs
index a91fdb2d67..9f1479d35b 100644
--- a/src/ImageSharp/Colors/Spaces/YCbCr.cs
+++ b/src/ImageSharp/Colors/Spaces/YCbCr.cs
@@ -23,7 +23,7 @@ namespace ImageSharp.Colors.Spaces
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
-        private Vector3 backingVector;
+        private readonly Vector3 backingVector;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="YCbCr"/> struct.

From fac940d9d4fc4cd27515af9d2de2e2515190ede4 Mon Sep 17 00:00:00 2001
From: Olivia <olivia_git@outlook.com>
Date: Wed, 28 Dec 2016 14:47:36 +0200
Subject: [PATCH 6/6] Making max value vector static.

---
 src/ImageSharp/Colors/Spaces/YCbCr.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Colors/Spaces/YCbCr.cs b/src/ImageSharp/Colors/Spaces/YCbCr.cs
index 9f1479d35b..83bddff7d0 100644
--- a/src/ImageSharp/Colors/Spaces/YCbCr.cs
+++ b/src/ImageSharp/Colors/Spaces/YCbCr.cs
@@ -20,6 +20,11 @@ namespace ImageSharp.Colors.Spaces
         /// </summary>
         public static readonly YCbCr Empty = default(YCbCr);
 
+        /// <summary>
+        /// Vector which is used in clamping to the max value
+        /// </summary>
+        private static readonly Vector3 VectorMax = new Vector3(255);
+
         /// <summary>
         /// The backing vector for SIMD support.
         /// </summary>
@@ -34,7 +39,7 @@ namespace ImageSharp.Colors.Spaces
         public YCbCr(byte y, byte cb, byte cr)
             : this()
         {
-            this.backingVector = Vector3.Clamp(new Vector3(y, cb, cr), Vector3.Zero, new Vector3(255));
+            this.backingVector = Vector3.Clamp(new Vector3(y, cb, cr), Vector3.Zero, VectorMax);
         }
 
         /// <summary>