!!samps 1 //this shader is applies gamma/contrast/brightness to the source image, and dumps it out. #include "sys/defs.h" layout(location=0) varying vec2 tc; layout(location=1) varying vec4 vc; #ifdef VERTEX_SHADER void main () { tc = v_texcoord; vc = v_colour; gl_Position = ftetransform(); } #endif #ifdef FRAGMENT_SHADER void main () { gl_FragColor = pow(texture2D(s_t0, tc) * vc.g, vec4(vc.r)) + vc.b; } #endif