/*	Copyright (c) 2004-2006, The Dojo Foundation	All Rights Reserved.	Licensed under the Academic Free License version 2.1 or above OR the	modified BSD license. For more information on Dojo licensing, see:		http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.graphics.color.hsl");dojo.require("dojo.lang.array");dojo.lang.extend(dojo.graphics.color.Color, {	toHsl: function() {		return dojo.graphics.color.rgb2hsl(this.toRgb());	}});dojo.graphics.color.rgb2hsl = function(r, g, b){	if (dojo.lang.isArray(r)) {		b = r[2] || 0;		g = r[1] || 0;		r = r[0] || 0;	}	r /= 255;	g /= 255;	b /= 255;	//	// based on C code from http://astronomy.swin.edu.au/~pbourke/colour/hsl/	//	var h = null;	var s = null;	var l = null;	var min = Math.min(r, g, b);	var max = Math.max(r, g, b);	var delta = max - min;	l = (min + max) / 2;	s = 0;	if ((l > 0) && (l < 1)){		s = delta / ((l < 0.5) ? (2 * l) : (2 - 2 * l));	}	h = 0;	if (delta > 0) {		if ((max == r) && (max != g)){			h += (g - b) / delta;		}		if ((max == g) && (max != b)){			h += (2 + (b - r) / delta);		}		if ((max == b) && (max != r)){			h += (4 + (r - g) / delta);		}		h *= 60;	}	h = (h == 0) ? 360 : Math.ceil((h / 360) * 255);	s = Math.ceil(s * 255);	l = Math.ceil(l * 255);	return [h, s, l];}dojo.graphics.color.hsl2rgb = function(h, s, l){ 	if (dojo.lang.isArray(h)) {		l = h[2] || 0;		s = h[1] || 0;		h = h[0] || 0;	}	h = (h / 255) * 360;	if (h == 360){ h = 0;}	s = s / 255;	l = l / 255;	//	// based on C code from http://astronomy.swin.edu.au/~pbourke/colour/hsl/	//	while (h < 0){ h += 360; }	while (h > 360){ h -= 360; }	var r, g, b;	if (h < 120){		r = (120 - h) / 60;		g = h / 60;		b = 0;	}else if (h < 240){		r = 0;		g = (240 - h) / 60;		b = (h - 120) / 60;	}else{		r = (h - 240) / 60;		g = 0;		b = (360 - h) / 60;	}	r = Math.min(r, 1);	g = Math.min(g, 1);	b = Math.min(b, 1);	r = 2 * s * r + (1 - s);	g = 2 * s * g + (1 - s);	b = 2 * s * b + (1 - s);	if (l < 0.5){		r = l * r;		g = l * g;		b = l * b;	}else{		r = (1 - l) * r + 2 * l - 1;		g = (1 - l) * g + 2 * l - 1;		b = (1 - l) * b + 2 * l - 1;	}	r = Math.ceil(r * 255);	g = Math.ceil(g * 255);	b = Math.ceil(b * 255);	return [r, g, b];}dojo.graphics.color.hsl2hex = function(h, s, l){	var rgb = dojo.graphics.color.hsl2rgb(h, s, l);	return dojo.graphics.color.rgb2hex(rgb[0], rgb[1], rgb[2]);}dojo.graphics.color.hex2hsl = function(hex){	var rgb = dojo.graphics.color.hex2rgb(hex);	return dojo.graphics.color.rgb2hsl(rgb[0], rgb[1], rgb[2]);}