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Added HSV and HSVA helpers

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This commit is contained in:
Mehran Kholdi
2012-08-23 14:59:15 +04:30
committed by Luke Page
parent abf87255f7
commit 695af3d597
1 changed files with 30 additions and 0 deletions
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30
lib/less/functions.js
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@@ -32,6 +32,36 @@ tree.functions = {
else return m1;
}
},
hsv: function(h, s, v) {
return this.hsva(h, s, v, 1.0);
},
hsva: function(h, s, v, a) {
h = (number(h) % 360) / 360;
s = number(s); v = number(v); a = number(a);
var i, f;
i = Math.floor((h / 60) % 6);
f = (h / 60) - i;
var vs = [v,
v * (1 - s),
v * (1 - f * s),
v * (1 - (1 - f) * s)];
var perm = [[0, 3, 1],
[2, 0, 1],
[1, 0, 3],
[1, 2, 0],
[3, 1, 0],
[0, 1, 2]];
return this.rgba(vs[perm[i][0]] * 255,
vs[perm[i][1]] * 255,
vs[perm[i][2]] * 255,
a);
},
hue: function (color) {
return new(tree.Dimension)(Math.round(color.toHSL().h));
},