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Use min() / max() in darken / lighten for shorter code.

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This commit is contained in:
Jürg Lehni 2011-06-01 17:09:32 +01:00
parent b08abcdd69
commit 8bbb3744fe
1 changed files with 7 additions and 6 deletions
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13
src/util/BlendMode.js
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@ -47,6 +47,7 @@ var BlendMode = {
src = sourceContext.getImageData(0, 0,
sourceCanvas.width, sourceCanvas.height).data,
min = Math.min,
max = Math.max,
sA, dA, rA, sM, dM, rM, sRA, sGA, sBA, dRA, dGA, dBA;
// TODO: Some blend modes seem broken at the moment, e.g. dodge, burn
@ -97,15 +98,15 @@ var BlendMode = {
},
darken: function(i) {
dst[i] = (sRA > dRA ? dRA : sRA) * rM;
dst[i + 1] = (sGA > dGA ? dGA : sGA) * rM;
dst[i + 2] = (sBA > dBA ? dBA : sBA) * rM;
dst[i] = min(sRA, dRA) * rM;
dst[i + 1] = min(sGA, dGA) * rM;
dst[i + 2] = min(sBA, dBA) * rM;
},
lighten: function(i) {
dst[i] = (sRA < dRA ? dRA : sRA) * rM;
dst[i + 1] = (sGA < dGA ? dGA : sGA) * rM;
dst[i + 2] = (sBA < dBA ? dBA : sBA) * rM;
dst[i] = max(sRA, dRA) * rM;
dst[i + 1] = max(sGA, dGA) * rM;
dst[i + 2] = max(sBA, dBA) * rM;
},
difference: function(i) {