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/* LinearCombinationOfManyImagesShader.frag.txt
* A fragment shader that computes a pixel-wise weighted linear combination
* of two input image textures bound to Image1 and Image2:
* outimage(x,y) = (Image1Weight * Image1(x,y)) + (Image2Weight * Image2(x,y));
*
* This one is e.g., used by the new moglmorpher.m for fast shape morphing
* on the GPU.
*
* (c) 2007 by Mario Kleiner, licensed to you under MIT license.
*/
#extension GL_ARB_texture_rectangle : enable
uniform sampler2DRect Image[gl_MaxTextureImageUnits];
uniform float ImageWeight[gl_MaxTextureImageUnits];
void main()
{
vec4 imgsum = vec4(0.0);
int i;
for (i=0; i < gl_MaxTextureImageUnits; i++) {
imgsum+= texture2DRect(Image[i], gl_TexCoord[0].st) * ImageWeight[i];
}
gl_FragColor = imgsum;
}
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