client/shaders/extract_bloom/opengl_vertex.glsl

   1 #ifdef ENABLE_AUTO_EXPOSURE
   2 #define exposureMap texture1
   3
   4 uniform sampler2D exposureMap;
   5
   6 varying float exposure;
   7 #endif
   8
   9 #ifdef GL_ES
  10 varying mediump vec2 varTexCoord;
  11 #else
  12 centroid varying vec2 varTexCoord;
  13 #endif
  14
  15
  16 void main(void)
  17 {
  18 #ifdef ENABLE_AUTO_EXPOSURE
  19         // value in the texture is on a logarithtmic scale
  20         exposure = texture2D(exposureMap, vec2(0.5)).r;
  21         exposure = pow(2., exposure);
  22 #endif
  23
  24         varTexCoord.st = inTexCoord0.st;
  25         gl_Position = inVertexPosition;
  26 }