source: [view]
var m = color.toLowerCase().match(/^(rgba?|hsla?)\(([\s\.\-,%0-9]+)\)/);
if(m){
var c = m[2].split(/\s*,\s*/), l = c.length, t = m[1], a;
if((t == "rgb" && l == 3) || (t == "rgba" && l == 4)){
var r = c[0];
if(r.charAt(r.length - 1) == "%"){
// 3 rgb percentage values
a = dojo.map(c, function(x){
return parseFloat(x) * 2.56;
});
if(l == 4){ a[3] = c[3]; }
return dojo.colorFromArray(a, obj); // dojo.Color
}
return dojo.colorFromArray(c, obj); // dojo.Color
}
if((t == "hsl" && l == 3) || (t == "hsla" && l == 4)){
// normalize hsl values
var H = ((parseFloat(c[0]) % 360) + 360) % 360 / 360,
S = parseFloat(c[1]) / 100,
L = parseFloat(c[2]) / 100,
// calculate rgb according to the algorithm
// recommended by the CSS3 Color Module
m2 = L <= 0.5 ? L * (S + 1) : L + S - L * S,
m1 = 2 * L - m2;
a = [
hue2rgb(m1, m2, H + 1 / 3) * 256,
hue2rgb(m1, m2, H) * 256,
hue2rgb(m1, m2, H - 1 / 3) * 256,
1
];
if(l == 4){ a[3] = c[3]; }
return dojo.colorFromArray(a, obj); // dojo.Color
}
}
return null; // dojo.Color