git.sesse.net Git - movit/blob - padding_effect.frag

   1 uniform vec2 PREFIX(offset);
   2 uniform vec2 PREFIX(scale);
   3 uniform vec2 PREFIX(texcoord_min);
   4 uniform vec2 PREFIX(texcoord_max);
   5
   6 vec4 FUNCNAME(vec2 tc) {
   7         tc -= PREFIX(offset);
   8         tc *= PREFIX(scale);
   9
  10 #if 1
  11         if (any(lessThan(tc, PREFIX(texcoord_min))) ||
  12             any(greaterThan(tc, PREFIX(texcoord_max)))) {
  13                 return PREFIX(border_color);
  14         }
  15 #endif
  16         if (any(lessThan(tc, vec2(0.0))) ||
  17             any(greaterThan(tc, vec2(1.0)))) {
  18                 return PREFIX(border_color);
  19         }
  20 #if 0
  21         // In theory, maybe we should test on the outmost textel centers
  22         // (e.g. (0.5/width, 0.5/height) for the top-left) instead of the
  23         // texture border. However, since we only support integer padding
  24         if (any(lessThan(tc, vec2(0.0))) || any(greaterThan(tc, vec2(1.0)))) {
  25                 return PREFIX(border_color);
  26         }
  27 #endif
  28
  29         return INPUT(tc);
  30 }