shaders/post_blur.h

   1 #ifndef SHADER_post_blur_H
   2 #define SHADER_post_blur_H
   3 static void shader_post_blur_link(void);
   4 static void shader_post_blur_register(void);
   5 static struct vg_shader _shader_post_blur = {
   6    .name = "post_blur",
   7    .link = shader_post_blur_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/post_blur.vs.glsl",
  11 .static_src =
  12 "layout (location=0) in vec2 a_co;\n"
  13 "out vec2 aTexCoords;\n"
  14 "\n"
  15 "void main(){\n"
  16 "       gl_Position = vec4( a_co * 2.0 - 1.0, 0.0, 1.0 );\n"
  17 "       aTexCoords = a_co;\n"
  18 "}\n"
  19 ""},
  20    .fs =
  21 {
  22 .orig_file = "shaders/post_blur.fs.glsl",
  23 .static_src =
  24 "uniform sampler2D uTexMain;\n"
  25 "uniform vec2 uDir;\n"
  26 "out vec4 FragColor;\n"
  27 "\n"
  28 "in vec2 aTexCoords;\n"
  29 "\n"
  30 "void main(){\n"
  31 "   vec4 colour = vec4(0.0);\n"
  32 "\n"
  33 "   vec2 off1 = vec2(1.411764705882353)  * uDir;\n"
  34 "   vec2 off2 = vec2(3.2941176470588234) * uDir;\n"
  35 "   vec2 off3 = vec2(5.176470588235294)  * uDir;\n"
  36 "   colour += texture2D( uTexMain, aTexCoords ) * 0.1964825501511404;\n"
  37 "   colour += texture2D( uTexMain, aTexCoords + off1 ) * 0.2969069646728344;\n"
  38 "   colour += texture2D( uTexMain, aTexCoords - off1 ) * 0.2969069646728344;\n"
  39 "   colour += texture2D( uTexMain, aTexCoords + off2 ) * 0.09447039785044732;\n"
  40 "   colour += texture2D( uTexMain, aTexCoords - off2 ) * 0.09447039785044732;\n"
  41 "   colour += texture2D( uTexMain, aTexCoords + off3 ) * 0.010381362401148057;\n"
  42 "   colour += texture2D( uTexMain, aTexCoords - off3 ) * 0.010381362401148057;\n"
  43 "       FragColor = colour;\n"
  44 "}\n"
  45 ""},
  46 };
  47
  48 static GLuint _uniform_post_blur_uTexMain;
  49 static GLuint _uniform_post_blur_uDir;
  50 static void shader_post_blur_uTexMain(int i){
  51    glUniform1i(_uniform_post_blur_uTexMain,i);
  52 }
  53 static void shader_post_blur_uDir(v2f const v){
  54    glUniform2fv(_uniform_post_blur_uDir,1,v);
  55 }
  56 static void shader_post_blur_register(void){
  57    vg_shader_register( &_shader_post_blur );
  58 }
  59 static void shader_post_blur_use(void){ glUseProgram(_shader_post_blur.id); }
  60 static void shader_post_blur_link(void){
  61    _uniform_post_blur_uTexMain = glGetUniformLocation( _shader_post_blur.id, "uTexMain" );
  62    _uniform_post_blur_uDir = glGetUniformLocation( _shader_post_blur.id, "uDir" );
  63 }
  64 #endif /* SHADER_post_blur_H */