4
(declare (in) float p))
5
((return (expression float dFdx (var_ref p)))))
10
((return (expression vec2 dFdx (var_ref p)))))
14
(declare (in) vec3 p))
15
((return (expression vec3 dFdx (var_ref p)))))
19
(declare (in) vec4 p))
20
((return (expression vec4 dFdx (var_ref p)))))