19 lines
582 B
GLSL
19 lines
582 B
GLSL
// Compute the pixelwise diff between two textures.
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// Computes the diff for each color chanel separately (r, g, b).
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// Assumes both images are not transparent.
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// try isampler2D, ivec4 etc.? Probably not
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uniform vec2 size;
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uniform sampler2D base;
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uniform sampler2D curr;
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void main(void)
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{
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vec2 pos = gl_FragCoord.xy/size;
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// vec4 color = texture(curr, pos); // fails for some reason!?
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// vec4 basecolor = texture(base, pos); // fails too...
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// color.xyz = abs(color.xyz - basecolor.xyz);
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// gl_FragColor = color;
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// gl_FragColor = basecolor;
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gl_FragColor = vec4(1.0);
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}
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