Subversion Repositories Applications.papyrus

Rev

Go to most recent revision | Details | 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 
 
11 
dojo.provide("dojo.gfx.color.hsl");
12 
dojo.require("dojo.lang.array");
13 
dojo.lang.extend(dojo.gfx.color.Color, {toHsl:function () {
14 
	return dojo.gfx.color.rgb2hsl(this.toRgb());
15 
}});
16 
dojo.gfx.color.rgb2hsl = function (r, g, b) {
17 
	if (dojo.lang.isArray(r)) {
18 
		b = r[2] || 0;
19 
		g = r[1] || 0;
20 
		r = r[0] || 0;
21 
	}
22 
	r /= 255;
23 
	g /= 255;
24 
	b /= 255;
25 
	var h = null;
26 
	var s = null;
27 
	var l = null;
28 
	var min = Math.min(r, g, b);
29 
	var max = Math.max(r, g, b);
30 
	var delta = max - min;
31 
	l = (min + max) / 2;
32 
	s = 0;
33 
	if ((l > 0) && (l < 1)) {
34 
		s = delta / ((l < 0.5) ? (2 * l) : (2 - 2 * l));
35 
	}
36 
	h = 0;
37 
	if (delta > 0) {
38 
		if ((max == r) && (max != g)) {
39 
			h += (g - b) / delta;
40 
		}
41 
		if ((max == g) && (max != b)) {
42 
			h += (2 + (b - r) / delta);
43 
		}
44 
		if ((max == b) && (max != r)) {
45 
			h += (4 + (r - g) / delta);
46 
		}
47 
		h *= 60;
48 
	}
49 
	h = (h == 0) ? 360 : Math.ceil((h / 360) * 255);
50 
	s = Math.ceil(s * 255);
51 
	l = Math.ceil(l * 255);
52 
	return [h, s, l];
53 
};
54 
dojo.gfx.color.hsl2rgb = function (h, s, l) {
55 
	if (dojo.lang.isArray(h)) {
56 
		l = h[2] || 0;
57 
		s = h[1] || 0;
58 
		h = h[0] || 0;
59 
	}
60 
	h = (h / 255) * 360;
61 
	if (h == 360) {
62 
		h = 0;
63 
	}
64 
	s = s / 255;
65 
	l = l / 255;
66 
	while (h < 0) {
67 
		h += 360;
68 
	}
69 
	while (h > 360) {
70 
		h -= 360;
71 
	}
72 
	var r, g, b;
73 
	if (h < 120) {
74 
		r = (120 - h) / 60;
75 
		g = h / 60;
76 
		b = 0;
77 
	} else {
78 
		if (h < 240) {
79 
			r = 0;
80 
			g = (240 - h) / 60;
81 
			b = (h - 120) / 60;
82 
		} else {
83 
			r = (h - 240) / 60;
84 
			g = 0;
85 
			b = (360 - h) / 60;
86 
		}
87 
	}
88 
	r = Math.min(r, 1);
89 
	g = Math.min(g, 1);
90 
	b = Math.min(b, 1);
91 
	r = 2 * s * r + (1 - s);
92 
	g = 2 * s * g + (1 - s);
93 
	b = 2 * s * b + (1 - s);
94 
	if (l < 0.5) {
95 
		r = l * r;
96 
		g = l * g;
97 
		b = l * b;
98 
	} else {
99 
		r = (1 - l) * r + 2 * l - 1;
100 
		g = (1 - l) * g + 2 * l - 1;
101 
		b = (1 - l) * b + 2 * l - 1;
102 
	}
103 
	r = Math.ceil(r * 255);
104 
	g = Math.ceil(g * 255);
105 
	b = Math.ceil(b * 255);
106 
	return [r, g, b];
107 
};
108 
dojo.gfx.color.hsl2hex = function (h, s, l) {
109 
	var rgb = dojo.gfx.color.hsl2rgb(h, s, l);
110 
	return dojo.gfx.color.rgb2hex(rgb[0], rgb[1], rgb[2]);
111 
};
112 
dojo.gfx.color.hex2hsl = function (hex) {
113 
	var rgb = dojo.gfx.color.hex2rgb(hex);
114 
	return dojo.gfx.color.rgb2hsl(rgb[0], rgb[1], rgb[2]);
115 
};
116