src/glsl/builtins/ir/fwidth

   1 ((function fwidth
   2    (signature float
   3      (parameters
   4        (declare (in) float p))
   5      ((return (expression float +
   6                 (expression float abs (expression float dFdx (var_ref p)))
   7                 (expression float abs (expression float dFdy (var_ref p)))))))
   8
   9    (signature vec2
  10      (parameters
  11        (declare (in) vec2 p))
  12      ((return (expression vec2 +
  13                 (expression vec2 abs (expression vec2 dFdx (var_ref p)))
  14                 (expression vec2 abs (expression vec2 dFdy (var_ref p)))))))
  15
  16    (signature vec3
  17      (parameters
  18        (declare (in) vec3 p))
  19      ((return (expression vec3 +
  20                 (expression vec3 abs (expression vec3 dFdx (var_ref p)))
  21                 (expression vec3 abs (expression vec3 dFdy (var_ref p)))))))
  22
  23    (signature vec4
  24      (parameters
  25        (declare (in) vec4 p))
  26      ((return (expression vec4 +
  27                 (expression vec4 abs (expression vec4 dFdx (var_ref p)))
  28                 (expression vec4 abs (expression vec4 dFdy (var_ref p)))))))
  29 ))