IPixel

src/ImageSharp/Colors/PackedPixel/IPixel.cs

@@ -0,0 +1,68 @@
+namespace ImageSharp
+{
+    using System;
+    using System.Numerics;
+
+    public interface IPixel
+    {
+        /// <summary>
+        /// Sets the packed representation from a <see cref="Vector4"/>.
+        /// </summary>
+        /// <param name="vector">The vector to create the packed representation from.</param>
+        void PackFromVector4(Vector4 vector);
+
+        /// <summary>
+        /// Expands the packed representation into a <see cref="Vector4"/>.
+        /// The vector components are typically expanded in least to greatest significance order.
+        /// </summary>
+        /// <returns>The <see cref="Vector4"/>.</returns>
+        Vector4 ToVector4();
+
+        /// <summary>
+        /// Sets the packed representation from the given byte array.
+        /// </summary>
+        /// <param name="x">The x-component.</param>
+        /// <param name="y">The y-component.</param>
+        /// <param name="z">The z-component.</param>
+        /// <param name="w">The w-component.</param>
+        void PackFromBytes(byte x, byte y, byte z, byte w);
+
+        /// <summary>
+        /// Expands the packed representation into a given byte array.
+        /// Output is expanded to X-> Y-> Z order. Equivalent to R-> G-> B in <see cref="Color"/>
+        /// </summary>
+        /// <param name="bytes">The bytes to set the color in.</param>
+        /// <param name="startIndex">The starting index of the <paramref name="bytes"/>.</param>
+        void ToXyzBytes(byte[] bytes, int startIndex);
+
+        /// <summary>
+        /// Expands the packed representation into a given byte array.
+        /// Output is expanded to X-> Y-> Z-> W order. Equivalent to R-> G-> B-> A in <see cref="Color"/>
+        /// </summary>
+        /// <param name="bytes">The bytes to set the color in.</param>
+        /// <param name="startIndex">The starting index of the <paramref name="bytes"/>.</param>
+        void ToXyzwBytes(byte[] bytes, int startIndex);
+
+        /// <summary>
+        /// Expands the packed representation into a given byte array.
+        /// Output is expanded to Z-> Y-> X order. Equivalent to B-> G-> R in <see cref="Color"/>
+        /// </summary>
+        /// <param name="bytes">The bytes to set the color in.</param>
+        /// <param name="startIndex">The starting index of the <paramref name="bytes"/>.</param>
+        void ToZyxBytes(byte[] bytes, int startIndex);
+
+        /// <summary>
+        /// Expands the packed representation into a given byte array.
+        /// Output is expanded to Z-> Y-> X-> W order. Equivalent to B-> G-> R-> A in <see cref="Color"/>
+        /// </summary>
+        /// <param name="bytes">The bytes to set the color in.</param>
+        /// <param name="startIndex">The starting index of the <paramref name="bytes"/>.</param>
+        void ToZyxwBytes(byte[] bytes, int startIndex);
+    }
+
+    public interface IPixel<TSelf> : IPixel, IEquatable<TSelf>
+        where TSelf : struct, IPixel<TSelf>
+    {
+        
+    }
+}

src/ImageSharp/Common/Memory/ArrayPointer{T}.cs

@@ -16,7 +16,7 @@ namespace ImageSharp
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public ArrayPointer(T[] array, void* pointerToArray, int offset)
         {
-            // TODO: Use Guard.NotNull() here after optimizing it with ThrowHelper!
+            // TODO: Use Guard.NotNull() here after optimizing it by eliminating the default argument case and applying ThrowHelper!
             if (array == null)
             {
                 ThrowHelper.ThrowArgumentNullException(nameof(array));
@@ -29,7 +29,7 @@ namespace ImageSharp
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public ArrayPointer(T[] array, void* pointerToArray)
         {
-            // TODO: Use Guard.NotNull() here after optimizing it with ThrowHelper!
+            // TODO: Use Guard.NotNull() here after optimizing it by eliminating the default argument case and applying ThrowHelper!
             if (array == null)
             {
                 ThrowHelper.ThrowArgumentNullException(nameof(array));