data/shader.fs

   1 #version 140
   2 // -*- mode: C -*-
   3 // Defines emitted by gridrectst::init_gl at load:
   4 // dimx, dimy:      Grid size of the screen array
   5 // dispx, dispy:    Grid-cell (font) size
   6 // vec4 colors[16]: Color palette; first non-bold, then bold
   7
   8 out vec4 gl_FragColor;
   9
  10 flat in vec4 frontColor;
  11 flat in vec4 backColor;
  12
  13 smooth in vec2 texCoords;
  14 uniform sampler2D textures;
  15
  16 void main() {
  17   vec4 texColor = texture2D(textures, texCoords);
  18
  19   gl_FragColor = mix(backColor, frontColor * texColor, texColor.a);
  20 }