Subversion Repositories Applications.papyrus

Rev

Rev 1318 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1318 alexandre_ 1 
/*
2 
	Copyright (c) 2004-2006, The Dojo Foundation
3 
	All Rights Reserved.
4 
 
5 
	Licensed under the Academic Free License version 2.1 or above OR the
6 
	modified BSD license. For more information on Dojo licensing, see:
7 
 
8 
		http://dojotoolkit.org/community/licensing.shtml
9 
*/
10 
 
1422 alexandre_ 11 
 
12 
 
1318 alexandre_ 13 
dojo.provide("dojo.gfx.color.hsl");
14 
dojo.require("dojo.lang.array");
15 
dojo.lang.extend(dojo.gfx.color.Color, {toHsl:function () {
16 
	return dojo.gfx.color.rgb2hsl(this.toRgb());
17 
}});
18 
dojo.gfx.color.rgb2hsl = function (r, g, b) {
19 
	if (dojo.lang.isArray(r)) {
20 
		b = r[2] || 0;
21 
		g = r[1] || 0;
22 
		r = r[0] || 0;
23 
	}
24 
	r /= 255;
25 
	g /= 255;
26 
	b /= 255;
27 
	var h = null;
28 
	var s = null;
29 
	var l = null;
30 
	var min = Math.min(r, g, b);
31 
	var max = Math.max(r, g, b);
32 
	var delta = max - min;
33 
	l = (min + max) / 2;
34 
	s = 0;
35 
	if ((l > 0) && (l < 1)) {
36 
		s = delta / ((l < 0.5) ? (2 * l) : (2 - 2 * l));
37 
	}
38 
	h = 0;
39 
	if (delta > 0) {
40 
		if ((max == r) && (max != g)) {
41 
			h += (g - b) / delta;
42 
		}
43 
		if ((max == g) && (max != b)) {
44 
			h += (2 + (b - r) / delta);
45 
		}
46 
		if ((max == b) && (max != r)) {
47 
			h += (4 + (r - g) / delta);
48 
		}
49 
		h *= 60;
50 
	}
51 
	h = (h == 0) ? 360 : Math.ceil((h / 360) * 255);
52 
	s = Math.ceil(s * 255);
53 
	l = Math.ceil(l * 255);
54 
	return [h, s, l];
55 
};
56 
dojo.gfx.color.hsl2rgb = function (h, s, l) {
57 
	if (dojo.lang.isArray(h)) {
58 
		l = h[2] || 0;
59 
		s = h[1] || 0;
60 
		h = h[0] || 0;
61 
	}
62 
	h = (h / 255) * 360;
63 
	if (h == 360) {
64 
		h = 0;
65 
	}
66 
	s = s / 255;
67 
	l = l / 255;
68 
	while (h < 0) {
69 
		h += 360;
70 
	}
71 
	while (h > 360) {
72 
		h -= 360;
73 
	}
74 
	var r, g, b;
75 
	if (h < 120) {
76 
		r = (120 - h) / 60;
77 
		g = h / 60;
78 
		b = 0;
79 
	} else {
80 
		if (h < 240) {
81 
			r = 0;
82 
			g = (240 - h) / 60;
83 
			b = (h - 120) / 60;
84 
		} else {
85 
			r = (h - 240) / 60;
86 
			g = 0;
87 
			b = (360 - h) / 60;
88 
		}
89 
	}
90 
	r = Math.min(r, 1);
91 
	g = Math.min(g, 1);
92 
	b = Math.min(b, 1);
93 
	r = 2 * s * r + (1 - s);
94 
	g = 2 * s * g + (1 - s);
95 
	b = 2 * s * b + (1 - s);
96 
	if (l < 0.5) {
97 
		r = l * r;
98 
		g = l * g;
99 
		b = l * b;
100 
	} else {
101 
		r = (1 - l) * r + 2 * l - 1;
102 
		g = (1 - l) * g + 2 * l - 1;
103 
		b = (1 - l) * b + 2 * l - 1;
104 
	}
105 
	r = Math.ceil(r * 255);
106 
	g = Math.ceil(g * 255);
107 
	b = Math.ceil(b * 255);
108 
	return [r, g, b];
109 
};
110 
dojo.gfx.color.hsl2hex = function (h, s, l) {
111 
	var rgb = dojo.gfx.color.hsl2rgb(h, s, l);
112 
	return dojo.gfx.color.rgb2hex(rgb[0], rgb[1], rgb[2]);
113 
};
114 
dojo.gfx.color.hex2hsl = function (hex) {
115 
	var rgb = dojo.gfx.color.hex2rgb(hex);
116 
	return dojo.gfx.color.rgb2hsl(rgb[0], rgb[1], rgb[2]);
117 
};
118