add ColorComplementEffect

src/Shared/HandyControl_Shared/HandyControl_Shared.projitems

@@ -58,6 +58,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Media\Animation\LinearGeometryKeyFrame.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Media\Animation\ResolvedKeyFrameEntry.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Media\Animation\SplineGeometryKeyFrame.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Media\Effects\ColorComplementEffect.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\BorderCircularClipConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ColLayoutConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\CornerRadiusSplitConverter.cs" />

src/Shared/HandyControl_Shared/Media/Effects/ColorComplementEffect.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Effects;
+
+namespace HandyControl.Media.Effects
+{
+    public class ColorComplementEffect : ShaderEffect
+    {
+        public static readonly DependencyProperty InputProperty = RegisterPixelShaderSamplerProperty("Input", typeof(ColorComplementEffect), 0);
+
+        private static readonly PixelShader Shader;
+
+        static ColorComplementEffect()
+        {
+            Shader = new PixelShader
+            {
+                UriSource = new Uri("pack://application:,,,/HandyControl;component/Resources/Effects/ColorComplementEffect.ps")
+            };
+        }
+
+        public ColorComplementEffect()
+        {
+            PixelShader = Shader;
+            UpdateShaderValue(InputProperty);
+        }
+
+        public Brush Input
+        {
+            get => (Brush)GetValue(InputProperty);
+            set => SetValue(InputProperty, value);
+        }
+    }
+}

src/Shared/HandyControl_Shared/Properties/AssemblyInfo.cs

@@ -22,6 +22,7 @@ using System.Runtime.InteropServices;
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Expression.Shapes")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Expression.Media")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Media.Animation")]
+[assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Media.Effects")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Data")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Properties.Langs")]
 [assembly: XmlnsPrefix("https://handyorg.github.io/handycontrol", "hc")]