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13 lines
377 B
GLSL
13 lines
377 B
GLSL
// Return 0 if x < 1 otherwise 1
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#define zero_or_one(x) step(1.f, x)
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// condition must be zero or one. When 1 thenval is returned otherwise elseval
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#define if_one_then(condition, thenval, elseval) mix(elseval, thenval, condition)
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vec4 vec4_premul(vec3 rgb, float a) {
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return vec4(rgb * a, a);
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}
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vec4 vec4_premul(vec4 rgba) {
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return vec4(rgba.rgb * rgba.a, rgba.a);
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}
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