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Add comment about overlay mode being the reverse of hard-light.

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Jürg Lehni 2011-06-01 17:11:06 +01:00
parent 3850e4a53b
commit f58aa2a23b
1 changed files with 1 additions and 0 deletions
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src/util/BlendMode.js
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@ -73,6 +73,7 @@ var BlendMode = {
},
overlay: function(i) {
// = Reverse of hard-light
// Correct for 100% opacity case; colors get clipped as opacity falls
dst[i] = dRA <= 0.5 ? (2 * src[i] * dRA / dA) : 255 - (2 - 2 * dRA / dA) * (255 - src[i]);
dst[i + 1] = dGA <= 0.5 ? (2 * src[i + 1] * dGA / dA) : 255 - (2 - 2 * dGA / dA) * (255 - src[i + 1]);