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fteqw/engine/shaders/glsl/defaultgammacb.glsl

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!!ver 100-450
//this shader is applies gamma/contrast/brightness to the source image, and dumps it out.
varying vec2 tc;
varying vec4 vc;
#ifdef VERTEX_SHADER
attribute vec2 v_texcoord;
attribute vec4 v_colour;
void main ()
{
tc = vec2(v_texcoord.s, 1.0-v_texcoord.t);
vc = v_colour;
gl_Position = ftetransform();
}
#endif
#ifdef FRAGMENT_SHADER
uniform sampler2D s_t0;
void main ()
{
gl_FragColor = pow(texture2D(s_t0, tc) * vc.g, vec4(vc.r)) + vc.b;
}
#endif