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/* Shader for gamma correction of RGBA textures.
* Uses standard formula for gamma correction.
* 'Gamma' is the factor to apply, ie. the inverse gamma 1/G
* if applying correction for a display with gamma G.
*
* This is just a wrapper around icmTransformColor(), so it can be used
* outside the imaging pipe, e.g., in Screen('TransformTexture') etc...
* (w)2008 by Mario Kleiner. Licensed under MIT license.
*/
#extension GL_ARB_texture_rectangle : enable
uniform sampler2DRect Image;
vec4 icmTransformColor(vec4 incolor);
void main()
{
/* Retrieve RGBA input texel, gamma-map and clamp, return as output: */
gl_FragColor = icmTransformColor(texture2DRect(Image, gl_TexCoord[0].st));
}
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