add Gooey Effect Demo

src/Shared/HandyControl_Shared/Resources/Effects/BrightnessEffect.fx

@@ -0,0 +1,10 @@
+sampler2D implicitInput : register(s0);
+float brightness : register(C0);
+
+float4 main(float2 uv : TEXCOORD) : COLOR
+{
+    float4 color = tex2D(implicitInput, uv); 
+    color.rgba *= brightness;
+    
+    return color;
+}

src/Shared/HandyControl_Shared/Resources/Effects/ColorComplementEffect.fx

@@ -1,3 +1,5 @@
+sampler2D implicitInput : register(s0);
+
 float4 main(float2 uv : TEXCOORD) : COLOR
 {
     float4 color = tex2D(implicitInput, uv);

src/Shared/HandyControl_Shared/Resources/Effects/ColorMatrixEffect.fx

@@ -0,0 +1,56 @@
+sampler2D implicitInput : register(s0);
+float a : register(c0);
+float b : register(c1);
+float c : register(c2);
+float d : register(c3);
+float e : register(c4);
+
+float f : register(c5);
+float g : register(c6);
+float h : register(c7);
+float i : register(c8);
+float j : register(c9);
+
+float k : register(c10);
+float l : register(c11);
+float m : register(c12);
+float n : register(c13);
+float o : register(c14);
+
+float p : register(c15);
+float q : register(c16);
+float r : register(c17);
+float s : register(c18);
+float t : register(c19);
+
+/*
+
+     --             --        --   --
+     | a  b  c  d  e |        |  R  |
+     | f  g  h  i  j |        |  G  |
+ A = | k  l  m  n  o |   C =  |  B  |  R = AC
+     | p  q  r  s  t |        |  A  |
+     --             --        |  1  |
+                              --   --
+
+*/
+
+float4 main(float2 uv : TEXCOORD) : COLOR
+{
+    float4 color = tex2D(implicitInput, uv);
+    
+    float4x4 matrixA1 =
+    {
+        a, b, c, d,
+        f, g, h, i,
+        k, l, m, n,
+        p, q, r, s
+    };
+
+    float4 matrixA2 =
+    {
+        e, j, o, t
+    };
+    
+    return mul(matrixA1, color) + matrixA2;
+}

src/Shared/HandyControl_Shared/Resources/Effects/ContrastEffect.fx

@@ -0,0 +1,12 @@
+sampler2D implicitInput : register(s0);
+float contrast : register(C0);
+
+float4 main(float2 uv : TEXCOORD) : COLOR
+{
+    float4 color = tex2D(implicitInput, uv); 
+    float value = (1 - contrast) / 2;
+
+    color.rgba = color.rgba * contrast + value;
+    
+    return color;
+}