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Let luma follow spec

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The `luma` function found in LESS is not implemented as defined in the specification (http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef).
This commit is contained in:
Roel van Duijnhoven
2014-02-20 16:19:19 +01:00
parent b053b9389f
commit ea1822385a
1 changed files with 11 additions and 1 deletions
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12
lib/less/tree/color.js
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@@ -28,7 +28,17 @@ var transparentKeyword = "transparent";
tree.Color.prototype = {
type: "Color",
eval: function () { return this; },
luma: function () { return (0.2126 * this.rgb[0] / 255) + (0.7152 * this.rgb[1] / 255) + (0.0722 * this.rgb[2] / 255); },
luma: function () {
var r = this.rgb[0] / 255,
g = this.rgb[1] / 255,
b = this.rgb[2] / 255;
r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);
g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);
b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);
return 0.2126 * r + 0.7152 * g + 0.0722 * b;
},
genCSS: function (env, output) {
output.add(this.toCSS(env));