Add plus and extended pixel blend modes

src/ImageSharp/PixelFormats/PixelAlphaCompositionMode.cs

@@ -66,5 +66,10 @@ public enum PixelAlphaCompositionMode
     /// <summary>
     /// Clear where they overlap.
     /// </summary>
-    Xor
+    Xor,
+
+    /// <summary>
+    /// Adds the source and destination, clamping the result to the supported color and alpha range.
+    /// </summary>
+    Plus,
 }

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

@@ -29,6 +29,7 @@ var composers = new []
     "DestOut",
     "Clear",
     "Xor",
+    "Plus",
 };
 
 var blenders = new []
@@ -42,6 +43,15 @@ var blenders = new []
     "Lighten",
     "Overlay",
     "HardLight",
+    "ColorDodge",
+    "ColorBurn",
+    "SoftLight",
+    "Difference",
+    "Exclusion",
+    "Hue",
+    "Saturation",
+    "Color",
+    "Luminosity",
 };
 #>
 /// <summary>

src/ImageSharp/PixelFormats/PixelBlenders/AssociatedAlphaPixelBlenders.cs

@@ -29,6 +29,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenSrc,
                 PixelColorBlendingMode.Overlay => OverlaySrc,
                 PixelColorBlendingMode.HardLight => HardLightSrc,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeSrc,
+                PixelColorBlendingMode.ColorBurn => ColorBurnSrc,
+                PixelColorBlendingMode.SoftLight => SoftLightSrc,
+                PixelColorBlendingMode.Difference => DifferenceSrc,
+                PixelColorBlendingMode.Exclusion => ExclusionSrc,
+                PixelColorBlendingMode.Hue => HueSrc,
+                PixelColorBlendingMode.Saturation => SaturationSrc,
+                PixelColorBlendingMode.Color => ColorSrc,
+                PixelColorBlendingMode.Luminosity => LuminositySrc,
                 _ => NormalSrc,
             },
             PixelAlphaCompositionMode.SrcAtop => colorMode switch
@@ -41,6 +50,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenSrcAtop,
                 PixelColorBlendingMode.Overlay => OverlaySrcAtop,
                 PixelColorBlendingMode.HardLight => HardLightSrcAtop,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeSrcAtop,
+                PixelColorBlendingMode.ColorBurn => ColorBurnSrcAtop,
+                PixelColorBlendingMode.SoftLight => SoftLightSrcAtop,
+                PixelColorBlendingMode.Difference => DifferenceSrcAtop,
+                PixelColorBlendingMode.Exclusion => ExclusionSrcAtop,
+                PixelColorBlendingMode.Hue => HueSrcAtop,
+                PixelColorBlendingMode.Saturation => SaturationSrcAtop,
+                PixelColorBlendingMode.Color => ColorSrcAtop,
+                PixelColorBlendingMode.Luminosity => LuminositySrcAtop,
                 _ => NormalSrcAtop,
             },
             PixelAlphaCompositionMode.SrcIn => colorMode switch
@@ -53,6 +71,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenSrcIn,
                 PixelColorBlendingMode.Overlay => OverlaySrcIn,
                 PixelColorBlendingMode.HardLight => HardLightSrcIn,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeSrcIn,
+                PixelColorBlendingMode.ColorBurn => ColorBurnSrcIn,
+                PixelColorBlendingMode.SoftLight => SoftLightSrcIn,
+                PixelColorBlendingMode.Difference => DifferenceSrcIn,
+                PixelColorBlendingMode.Exclusion => ExclusionSrcIn,
+                PixelColorBlendingMode.Hue => HueSrcIn,
+                PixelColorBlendingMode.Saturation => SaturationSrcIn,
+                PixelColorBlendingMode.Color => ColorSrcIn,
+                PixelColorBlendingMode.Luminosity => LuminositySrcIn,
                 _ => NormalSrcIn,
             },
             PixelAlphaCompositionMode.SrcOut => colorMode switch
@@ -65,6 +92,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenSrcOut,
                 PixelColorBlendingMode.Overlay => OverlaySrcOut,
                 PixelColorBlendingMode.HardLight => HardLightSrcOut,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeSrcOut,
+                PixelColorBlendingMode.ColorBurn => ColorBurnSrcOut,
+                PixelColorBlendingMode.SoftLight => SoftLightSrcOut,
+                PixelColorBlendingMode.Difference => DifferenceSrcOut,
+                PixelColorBlendingMode.Exclusion => ExclusionSrcOut,
+                PixelColorBlendingMode.Hue => HueSrcOut,
+                PixelColorBlendingMode.Saturation => SaturationSrcOut,
+                PixelColorBlendingMode.Color => ColorSrcOut,
+                PixelColorBlendingMode.Luminosity => LuminositySrcOut,
                 _ => NormalSrcOut,
             },
             PixelAlphaCompositionMode.Dest => colorMode switch
@@ -77,6 +113,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenDest,
                 PixelColorBlendingMode.Overlay => OverlayDest,
                 PixelColorBlendingMode.HardLight => HardLightDest,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeDest,
+                PixelColorBlendingMode.ColorBurn => ColorBurnDest,
+                PixelColorBlendingMode.SoftLight => SoftLightDest,
+                PixelColorBlendingMode.Difference => DifferenceDest,
+                PixelColorBlendingMode.Exclusion => ExclusionDest,
+                PixelColorBlendingMode.Hue => HueDest,
+                PixelColorBlendingMode.Saturation => SaturationDest,
+                PixelColorBlendingMode.Color => ColorDest,
+                PixelColorBlendingMode.Luminosity => LuminosityDest,
                 _ => NormalDest,
             },
             PixelAlphaCompositionMode.DestAtop => colorMode switch
@@ -89,6 +134,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenDestAtop,
                 PixelColorBlendingMode.Overlay => OverlayDestAtop,
                 PixelColorBlendingMode.HardLight => HardLightDestAtop,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeDestAtop,
+                PixelColorBlendingMode.ColorBurn => ColorBurnDestAtop,
+                PixelColorBlendingMode.SoftLight => SoftLightDestAtop,
+                PixelColorBlendingMode.Difference => DifferenceDestAtop,
+                PixelColorBlendingMode.Exclusion => ExclusionDestAtop,
+                PixelColorBlendingMode.Hue => HueDestAtop,
+                PixelColorBlendingMode.Saturation => SaturationDestAtop,
+                PixelColorBlendingMode.Color => ColorDestAtop,
+                PixelColorBlendingMode.Luminosity => LuminosityDestAtop,
                 _ => NormalDestAtop,
             },
             PixelAlphaCompositionMode.DestOver => colorMode switch
@@ -101,6 +155,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenDestOver,
                 PixelColorBlendingMode.Overlay => OverlayDestOver,
                 PixelColorBlendingMode.HardLight => HardLightDestOver,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeDestOver,
+                PixelColorBlendingMode.ColorBurn => ColorBurnDestOver,
+                PixelColorBlendingMode.SoftLight => SoftLightDestOver,
+                PixelColorBlendingMode.Difference => DifferenceDestOver,
+                PixelColorBlendingMode.Exclusion => ExclusionDestOver,
+                PixelColorBlendingMode.Hue => HueDestOver,
+                PixelColorBlendingMode.Saturation => SaturationDestOver,
+                PixelColorBlendingMode.Color => ColorDestOver,
+                PixelColorBlendingMode.Luminosity => LuminosityDestOver,
                 _ => NormalDestOver,
             },
             PixelAlphaCompositionMode.DestIn => colorMode switch
@@ -113,6 +176,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenDestIn,
                 PixelColorBlendingMode.Overlay => OverlayDestIn,
                 PixelColorBlendingMode.HardLight => HardLightDestIn,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeDestIn,
+                PixelColorBlendingMode.ColorBurn => ColorBurnDestIn,
+                PixelColorBlendingMode.SoftLight => SoftLightDestIn,
+                PixelColorBlendingMode.Difference => DifferenceDestIn,
+                PixelColorBlendingMode.Exclusion => ExclusionDestIn,
+                PixelColorBlendingMode.Hue => HueDestIn,
+                PixelColorBlendingMode.Saturation => SaturationDestIn,
+                PixelColorBlendingMode.Color => ColorDestIn,
+                PixelColorBlendingMode.Luminosity => LuminosityDestIn,
                 _ => NormalDestIn,
             },
             PixelAlphaCompositionMode.DestOut => colorMode switch
@@ -125,6 +197,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenDestOut,
                 PixelColorBlendingMode.Overlay => OverlayDestOut,
                 PixelColorBlendingMode.HardLight => HardLightDestOut,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeDestOut,
+                PixelColorBlendingMode.ColorBurn => ColorBurnDestOut,
+                PixelColorBlendingMode.SoftLight => SoftLightDestOut,
+                PixelColorBlendingMode.Difference => DifferenceDestOut,
+                PixelColorBlendingMode.Exclusion => ExclusionDestOut,
+                PixelColorBlendingMode.Hue => HueDestOut,
+                PixelColorBlendingMode.Saturation => SaturationDestOut,
+                PixelColorBlendingMode.Color => ColorDestOut,
+                PixelColorBlendingMode.Luminosity => LuminosityDestOut,
                 _ => NormalDestOut,
             },
             PixelAlphaCompositionMode.Clear => colorMode switch
@@ -137,6 +218,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenClear,
                 PixelColorBlendingMode.Overlay => OverlayClear,
                 PixelColorBlendingMode.HardLight => HardLightClear,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeClear,
+                PixelColorBlendingMode.ColorBurn => ColorBurnClear,
+                PixelColorBlendingMode.SoftLight => SoftLightClear,
+                PixelColorBlendingMode.Difference => DifferenceClear,
+                PixelColorBlendingMode.Exclusion => ExclusionClear,
+                PixelColorBlendingMode.Hue => HueClear,
+                PixelColorBlendingMode.Saturation => SaturationClear,
+                PixelColorBlendingMode.Color => ColorClear,
+                PixelColorBlendingMode.Luminosity => LuminosityClear,
                 _ => NormalClear,
             },
             PixelAlphaCompositionMode.Xor => colorMode switch
@@ -149,8 +239,38 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenXor,
                 PixelColorBlendingMode.Overlay => OverlayXor,
                 PixelColorBlendingMode.HardLight => HardLightXor,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeXor,
+                PixelColorBlendingMode.ColorBurn => ColorBurnXor,
+                PixelColorBlendingMode.SoftLight => SoftLightXor,
+                PixelColorBlendingMode.Difference => DifferenceXor,
+                PixelColorBlendingMode.Exclusion => ExclusionXor,
+                PixelColorBlendingMode.Hue => HueXor,
+                PixelColorBlendingMode.Saturation => SaturationXor,
+                PixelColorBlendingMode.Color => ColorXor,
+                PixelColorBlendingMode.Luminosity => LuminosityXor,
                 _ => NormalXor,
             },
+            PixelAlphaCompositionMode.Plus => colorMode switch
+            {
+                PixelColorBlendingMode.Multiply => MultiplyPlus,
+                PixelColorBlendingMode.Add => AddPlus,
+                PixelColorBlendingMode.Subtract => SubtractPlus,
+                PixelColorBlendingMode.Screen => ScreenPlus,
+                PixelColorBlendingMode.Darken => DarkenPlus,
+                PixelColorBlendingMode.Lighten => LightenPlus,
+                PixelColorBlendingMode.Overlay => OverlayPlus,
+                PixelColorBlendingMode.HardLight => HardLightPlus,
+                PixelColorBlendingMode.ColorDodge => ColorDodgePlus,
+                PixelColorBlendingMode.ColorBurn => ColorBurnPlus,
+                PixelColorBlendingMode.SoftLight => SoftLightPlus,
+                PixelColorBlendingMode.Difference => DifferencePlus,
+                PixelColorBlendingMode.Exclusion => ExclusionPlus,
+                PixelColorBlendingMode.Hue => HuePlus,
+                PixelColorBlendingMode.Saturation => SaturationPlus,
+                PixelColorBlendingMode.Color => ColorPlus,
+                PixelColorBlendingMode.Luminosity => LuminosityPlus,
+                _ => NormalPlus,
+            },
             _ => colorMode switch
             {
                 PixelColorBlendingMode.Multiply => MultiplySrcOver,
@@ -161,6 +281,15 @@ public static PixelBlender<TPixel> GetPixelBlender(PixelColorBlendingMode colorM
                 PixelColorBlendingMode.Lighten => LightenSrcOver,
                 PixelColorBlendingMode.Overlay => OverlaySrcOver,
                 PixelColorBlendingMode.HardLight => HardLightSrcOver,
+                PixelColorBlendingMode.ColorDodge => ColorDodgeSrcOver,
+                PixelColorBlendingMode.ColorBurn => ColorBurnSrcOver,
+                PixelColorBlendingMode.SoftLight => SoftLightSrcOver,
+                PixelColorBlendingMode.Difference => DifferenceSrcOver,
+                PixelColorBlendingMode.Exclusion => ExclusionSrcOver,
+                PixelColorBlendingMode.Hue => HueSrcOver,
+                PixelColorBlendingMode.Saturation => SaturationSrcOver,
+                PixelColorBlendingMode.Color => ColorSrcOver,
+                PixelColorBlendingMode.Luminosity => LuminositySrcOver,
                 _ => NormalSrcOver,
             },
         };