shaders/post_comp.h

   1 #ifndef SHADER_post_comp_H
   2 #define SHADER_post_comp_H
   3 static void shader_post_comp_link(void);
   4 static void shader_post_comp_register(void);
   5 static struct vg_shader _shader_post_comp = {
   6    .name = "post_comp",
   7    .link = shader_post_comp_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/post_comp.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_comp.fs.glsl",
  23 .static_src =
  24 "uniform sampler2D uTexMain;\n"
  25 "uniform sampler2D uTexBloom;\n"
  26 "uniform vec2 uComp; /* x: bloom, y: vignette */\n"
  27 "out vec4 FragColor;\n"
  28 "\n"
  29 "in vec2 aTexCoords;\n"
  30 "\n"
  31 "void main(){\n"
  32 "       vec4 texture_sample = texture( uTexMain, aTexCoords );\n"
  33 "   vec4 bloom_sample = texture( uTexBloom, aTexCoords );\n"
  34 "   \n"
  35 "   vec2 vigCoord = aTexCoords - 0.5;\n"
  36 "   float vig = pow(1.0 - dot( vigCoord, vigCoord ), 2.0);\n"
  37 "   \n"
  38 "       FragColor = (texture_sample + bloom_sample*0.3*uComp.x)\n"
  39 "                * max(uComp.y, vig);\n"
  40 "}\n"
  41 ""},
  42 };
  43
  44 static GLuint _uniform_post_comp_uTexMain;
  45 static GLuint _uniform_post_comp_uTexBloom;
  46 static GLuint _uniform_post_comp_uComp;
  47 static void shader_post_comp_uTexMain(int i){
  48    glUniform1i(_uniform_post_comp_uTexMain,i);
  49 }
  50 static void shader_post_comp_uTexBloom(int i){
  51    glUniform1i(_uniform_post_comp_uTexBloom,i);
  52 }
  53 static void shader_post_comp_uComp(v2f const v){
  54    glUniform2fv(_uniform_post_comp_uComp,1,v);
  55 }
  56 static void shader_post_comp_register(void){
  57    vg_shader_register( &_shader_post_comp );
  58 }
  59 static void shader_post_comp_use(void){ glUseProgram(_shader_post_comp.id); }
  60 static void shader_post_comp_link(void){
  61    _uniform_post_comp_uTexMain = glGetUniformLocation( _shader_post_comp.id, "uTexMain" );
  62    _uniform_post_comp_uTexBloom = glGetUniformLocation( _shader_post_comp.id, "uTexBloom" );
  63    _uniform_post_comp_uComp = glGetUniformLocation( _shader_post_comp.id, "uComp" );
  64 }
  65 #endif /* SHADER_post_comp_H */