c6e19f0384
... and use it for a naive color node implementation using both so I can test it actually works.
17 lines
244 B
GLSL
17 lines
244 B
GLSL
#ifndef _COLOR_
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#define _COLOR_
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vec4
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color_premultiply (vec4 color)
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{
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return vec4 (color.rgb, 1.0) * color.a;
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}
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vec4
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color_unpremultiply (vec4 color)
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{
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return color.a > 0.0 ? color / vec4 (color.aaa, 1.0) : color;
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}
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#endif /* _COLOR_ */
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