New Shader Image Processing

Cleanup shaders and add image processing shader for source

ImageProcessingShader.h

@@ -1,6 +1,8 @@
 #ifndef IMAGEPROCESSINGSHADER_H
 #define IMAGEPROCESSINGSHADER_H
 
+#include <glm/glm.hpp>
+
 #include "Shader.h"
 
 class ImageProcessingShader : public Shader
@@ -8,15 +10,37 @@ class ImageProcessingShader : public Shader
 public:
 
     ImageProcessingShader();
-    virtual ~ImageShader() {}
+    virtual ~ImageProcessingShader() {}
 
     virtual void use();
     virtual void reset();
     virtual void accept(Visitor& v);
 
-    float brightness;
-    float contrast;
-    float stipple;
+    // textures resolution
+    glm::vec3 iChannelResolution[2];
+
+    // color effects
+    float brightness; // [-1 1]
+    float contrast;   // [-1 1]
+    float saturation; // [-1 1]
+    float hueshift;   // [0 1]
+    float threshold;  // [0 1]
+    float lumakey;    // [0 1]
+    // gamma
+    glm::vec4 gamma;
+    glm::vec4 levels;
+    // discrete operations
+    int nbColors;
+    int invert;
+    // chroma key
+    glm::vec4 chromakey;
+    float chromadelta;
+    // filter
+    // [0] No filter
+    // [1 4] 4 x kernel operations;  Blur, Sharpen, Edge, Emboss
+    // [5 10] 6 x convolutions: erosion 3, 5, 7, dilation 3, 5, 7
+    int filter;
+
 };