Fix spelling

src/ImageSharp/PixelFormats/PixelBlenders/DefaultPixelBlenders.Generated.cs

@@ -141,17 +141,17 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
                 }
             }
 
-            internal class Substract : PixelBlender<TPixel>
+            internal class Subtract : PixelBlender<TPixel>
             {
                 /// <summary>
                 /// Gets the static instance of this blender.
                 /// </summary>
-                public static Substract Instance { get; } = new Substract();
+                public static Subtract Instance { get; } = new Subtract();
 
                 /// <inheritdoc />
                 public override TPixel Blend(TPixel background, TPixel source, float amount)
                 {
-                    return PorterDuffFunctions.Substract(background, source, amount);
+                    return PorterDuffFunctions.Subtract(background, source, amount);
                 }
 
                 /// <inheritdoc />
@@ -172,7 +172,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
 
                         for (int i = 0; i < destination.Length; i++)
                         {
-                            destinationSpan[i] = PorterDuffFunctions.Substract(backgroundSpan[i], sourceSpan[i], amount[i]);
+                            destinationSpan[i] = PorterDuffFunctions.Subtract(backgroundSpan[i], sourceSpan[i], amount[i]);
                         }
 
                         PixelOperations<TPixel>.Instance.PackFromVector4(destinationSpan, destination, destination.Length);

src/ImageSharp/PixelFormats/PixelBlenders/DefaultPixelBlenders.Generated.tt

@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         "Normal",
         "Multiply",
         "Add",
-        "Substract",
+        "Subtract",
         "Screen",
         "Darken",
         "Lighten",

src/ImageSharp/PixelFormats/PixelBlenders/PorterDuffFunctions.Generated.cs

@@ -285,11 +285,11 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static TPixel Substract<TPixel>(TPixel backdrop, TPixel source, float amount)
+        public static TPixel Subtract<TPixel>(TPixel backdrop, TPixel source, float amount)
             where TPixel : struct, IPixel<TPixel>
         {
             TPixel dest = default(TPixel);
-            dest.PackFromVector4(Substract(backdrop.ToVector4(), source.ToVector4(), amount));
+            dest.PackFromVector4(Subtract(backdrop.ToVector4(), source.ToVector4(), amount));
             return dest;
         }
 

src/ImageSharp/PixelFormats/PixelBlenders/PorterDuffFunctions.Generated.tt

@@ -83,7 +83,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         GeneratePixelBlender("Normal");
         GeneratePixelBlender("Multiply");
         GeneratePixelBlender("Add");
-        GeneratePixelBlender("Substract");
+        GeneratePixelBlender("Subtract");
         GeneratePixelBlender("Screen");
         GeneratePixelBlender("Darken");
         GeneratePixelBlender("Lighten");

src/ImageSharp/PixelFormats/PixelBlenders/PorterDuffFunctions.cs

@@ -23,7 +23,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Source over backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Source multiplied by backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Source added to backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -63,14 +63,14 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         }
 
         /// <summary>
-        /// Source substracted from backdrop
+        /// Source subtracted from backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector4 Substract(Vector4 backdrop, Vector4 source, float opacity)
+        public static Vector4 Subtract(Vector4 backdrop, Vector4 source, float opacity)
         {
             source.W *= opacity;
             return Compose(backdrop, source, Vector4.Max(Vector4.Zero, backdrop - source));
@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Complement of source multiplied by the complement of backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -93,7 +93,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Per element, chooses the smallest value of source and backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -107,7 +107,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Per element, chooses the largest value of source and backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -121,7 +121,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Overlays source over backdrop
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -139,7 +139,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// Hard light effect
         /// </summary>
-        /// <param name="backdrop">Backgrop color</param>
+        /// <param name="backdrop">Backdrop color</param>
         /// <param name="source">Source color</param>
         /// <param name="opacity">Opacity applied to Source Alpha</param>
         /// <returns>Output color</returns>
@@ -169,7 +169,7 @@ namespace SixLabors.ImageSharp.PixelFormats.PixelBlenders
         /// <summary>
         /// General composition function for all modes, with a general solution for alpha channel
         /// </summary>
-        /// <param name="backdrop">Original backgrop color</param>
+        /// <param name="backdrop">Original Backdrop color</param>
         /// <param name="source">Original source color</param>
         /// <param name="xform">Desired transformed color, without taking Alpha channel in account</param>
         /// <returns>The final color</returns>

tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffFunctionsTests.cs

@@ -79,7 +79,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelBlenders
         [MemberData(nameof(SubstractFunctionData))]
         public void SubstractFunction(TestVector4 back, TestVector4 source, float amount, TestVector4 expected)
         {
-            Vector4 actual = PorterDuffFunctions.Substract((Vector4)back, source, amount);
+            Vector4 actual = PorterDuffFunctions.Subtract((Vector4)back, source, amount);
             VectorAssert.Equal(expected, actual, 5);
         }
 

tests/ImageSharp.Tests/PixelFormats/PixelBlenders/PorterDuffFunctionsTests_TPixel.cs

@@ -151,7 +151,7 @@ namespace SixLabors.ImageSharp.Tests.PixelFormats.PixelBlenders
         public void SubstractFunction<TPixel>(TestPixel<TPixel> back, TestPixel<TPixel> source, float amount, TestPixel<TPixel> expected)
             where TPixel : struct, IPixel<TPixel>
         {
-            TPixel actual = PorterDuffFunctions.Substract((TPixel)back, source, amount);
+            TPixel actual = PorterDuffFunctions.Subtract((TPixel)back, source, amount);
             VectorAssert.Equal(expected, actual, 2);
         }