/*
Script: Color.js
Class for creating and manipulating colors in JavaScript. Supports HSB -> RGB Conversions and vice versa.
License:
MIT-style license.
*/
var Color = new Native({
initialize: function(color, type){
if (arguments.length >= 3){
type = "rgb"; color = Array.slice(arguments, 0, 3);
} else if (typeof color == 'string'){
if (color.match(/rgb/)) color = color.rgbToHex().hexToRgb(true);
else if (color.match(/hsb/)) color = color.hsbToRgb();
else color = color.hexToRgb(true);
}
type = type || 'rgb';
switch (type){
case 'hsb':
var old = color;
color = color.hsbToRgb();
color.hsb = old;
break;
case 'hex': color = color.hexToRgb(true); break;
}
color.rgb = color.slice(0, 3);
color.hsb = color.hsb || color.rgbToHsb();
color.hex = color.rgbToHex();
return $extend(color, this);
}
});
Color.implement({
mix: function(){
var colors = Array.slice(arguments);
var alpha = ($type(colors.getLast()) == 'number') ? colors.pop() : 50;
var rgb = this.slice();
colors.each(function(color){
color = new Color(color);
for (var i = 0; i < 3; i++) rgb[i] = Math.round((rgb[i] / 100 * (100 - alpha)) + (color[i] / 100 * alpha));
});
return new Color(rgb, 'rgb');
},
invert: function(){
return new Color(this.map(function(value){
return 255 - value;
}));
},
setHue: function(value){
return new Color([value, this.hsb[1], this.hsb[2]], 'hsb');
},
setSaturation: function(percent){
return new Color([this.hsb[0], percent, this.hsb[2]], 'hsb');
},
setBrightness: function(percent){
return new Color([this.hsb[0], this.hsb[1], percent], 'hsb');
}
});
function $RGB(r, g, b){
return new Color([r, g, b], 'rgb');
};
function $HSB(h, s, b){
return new Color([h, s, b], 'hsb');
};
function $HEX(hex){
return new Color(hex, 'hex');
};
Array.implement({
rgbToHsb: function(){
var red = this[0], green = this[1], blue = this[2];
var hue, saturation, brightness;
var max = Math.max(red, green, blue), min = Math.min(red, green, blue);
var delta = max - min;
brightness = max / 255;
saturation = (max != 0) ? delta / max : 0;
if (saturation == 0){
hue = 0;
} else {
var rr = (max - red) / delta;
var gr = (max - green) / delta;
var br = (max - blue) / delta;
if (red == max) hue = br - gr;
else if (green == max) hue = 2 + rr - br;
else hue = 4 + gr - rr;
hue /= 6;
if (hue < 0) hue++;
}
return [Math.round(hue * 360), Math.round(saturation * 100), Math.round(brightness * 100)];
},
hsbToRgb: function(){
var br = Math.round(this[2] / 100 * 255);
if (this[1] == 0){
return [br, br, br];
} else {
var hue = this[0] % 360;
var f = hue % 60;
var p = Math.round((this[2] * (100 - this[1])) / 10000 * 255);
var q = Math.round((this[2] * (6000 - this[1] * f)) / 600000 * 255);
var t = Math.round((this[2] * (6000 - this[1] * (60 - f))) / 600000 * 255);
switch (Math.floor(hue / 60)){
case 0: return [br, t, p];
case 1: return [q, br, p];
case 2: return [p, br, t];
case 3: return [p, q, br];
case 4: return [t, p, br];
case 5: return [br, p, q];
}
}
return false;
}
});
String.implement({
rgbToHsb: function(){
var rgb = this.match(/\d{1,3}/g);
return (rgb) ? hsb.rgbToHsb() : null;
},
hsbToRgb: function(){
var hsb = this.match(/\d{1,3}/g);
return (hsb) ? hsb.hsbToRgb() : null;
}
});