shaders/sprite.h

   1 #ifndef SHADER_sprite_H
   2 #define SHADER_sprite_H
   3 static void shader_sprite_link(void);
   4 static void shader_sprite_register(void);
   5 static struct vg_shader _shader_sprite = {
   6    .name = "sprite",
   7    .link = shader_sprite_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/sprite.vs.glsl",
  11 .static_src =
  12 "layout (location=0) in vec2 a_co; // quad mesh\n"
  13 "uniform vec4 uUv;\n"
  14 "uniform vec3 uPos;\n"
  15 "\n"
  16 "uniform mat3 uPv;\n"
  17 "\n"
  18 "out vec2 aTexCoords;\n"
  19 "\n"
  20 "void main(){\n"
  21 "       vec2 vertex_world = uUv.zw * (a_co-0.5) * uPos.z + uPos.xy;\n"
  22 "       gl_Position = vec4( uPv * vec3( vertex_world, 1.0 ), 1.0 );\n"
  23 "       aTexCoords = uUv.xy + a_co*uUv.zw;\n"
  24 "}\n"
  25 ""},
  26    .fs =
  27 {
  28 .orig_file = "shaders/sprite.fs.glsl",
  29 .static_src =
  30 "uniform sampler2D uTexMain;\n"
  31 "out vec4 FragColor;\n"
  32 "\n"
  33 "in vec2 aTexCoords;\n"
  34 "\n"
  35 "void main(){\n"
  36 "       vec4 texture_sample = texture( uTexMain, aTexCoords );\n"
  37 "       FragColor = texture_sample;\n"
  38 "}\n"
  39 ""},
  40 };
  41
  42 static GLuint _uniform_sprite_uUv;
  43 static GLuint _uniform_sprite_uPos;
  44 static GLuint _uniform_sprite_uPv;
  45 static GLuint _uniform_sprite_uTexMain;
  46 static void shader_sprite_uUv(v4f const v){
  47    glUniform4fv(_uniform_sprite_uUv,1,v);
  48 }
  49 static void shader_sprite_uPos(v3f const v){
  50    glUniform3fv(_uniform_sprite_uPos,1,v);
  51 }
  52 static void shader_sprite_uPv(m3x3f m){
  53    glUniformMatrix3fv(_uniform_sprite_uPv,1,GL_FALSE,(float*)m);
  54 }
  55 static void shader_sprite_uTexMain(int i){
  56    glUniform1i(_uniform_sprite_uTexMain,i);
  57 }
  58 static void shader_sprite_register(void){
  59    vg_shader_register( &_shader_sprite );
  60 }
  61 static void shader_sprite_use(void){ glUseProgram(_shader_sprite.id); }
  62 static void shader_sprite_link(void){
  63    _uniform_sprite_uUv = glGetUniformLocation( _shader_sprite.id, "uUv" );
  64    _uniform_sprite_uPos = glGetUniformLocation( _shader_sprite.id, "uPos" );
  65    _uniform_sprite_uPv = glGetUniformLocation( _shader_sprite.id, "uPv" );
  66    _uniform_sprite_uTexMain = glGetUniformLocation( _shader_sprite.id, "uTexMain" );
  67 }
  68 #endif /* SHADER_sprite_H */