| 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");
|
|
|
12 |
dojo.require("dojo.lang.common");
|
|
|
13 |
dojo.require("dojo.lang.array");
|
|
|
14 |
dojo.gfx.color.Color = function (r, g, b, a) {
|
|
|
15 |
if (dojo.lang.isArray(r)) {
|
|
|
16 |
this.r = r[0];
|
|
|
17 |
this.g = r[1];
|
|
|
18 |
this.b = r[2];
|
|
|
19 |
this.a = r[3] || 1;
|
|
|
20 |
} else {
|
|
|
21 |
if (dojo.lang.isString(r)) {
|
|
|
22 |
var rgb = dojo.gfx.color.extractRGB(r);
|
|
|
23 |
this.r = rgb[0];
|
|
|
24 |
this.g = rgb[1];
|
|
|
25 |
this.b = rgb[2];
|
|
|
26 |
this.a = g || 1;
|
|
|
27 |
} else {
|
|
|
28 |
if (r instanceof dojo.gfx.color.Color) {
|
|
|
29 |
this.r = r.r;
|
|
|
30 |
this.b = r.b;
|
|
|
31 |
this.g = r.g;
|
|
|
32 |
this.a = r.a;
|
|
|
33 |
} else {
|
|
|
34 |
this.r = r;
|
|
|
35 |
this.g = g;
|
|
|
36 |
this.b = b;
|
|
|
37 |
this.a = a;
|
|
|
38 |
}
|
|
|
39 |
}
|
|
|
40 |
}
|
|
|
41 |
};
|
|
|
42 |
dojo.gfx.color.Color.fromArray = function (arr) {
|
|
|
43 |
return new dojo.gfx.color.Color(arr[0], arr[1], arr[2], arr[3]);
|
|
|
44 |
};
|
|
|
45 |
dojo.extend(dojo.gfx.color.Color, {toRgb:function (includeAlpha) {
|
|
|
46 |
if (includeAlpha) {
|
|
|
47 |
return this.toRgba();
|
|
|
48 |
} else {
|
|
|
49 |
return [this.r, this.g, this.b];
|
|
|
50 |
}
|
|
|
51 |
}, toRgba:function () {
|
|
|
52 |
return [this.r, this.g, this.b, this.a];
|
|
|
53 |
}, toHex:function () {
|
|
|
54 |
return dojo.gfx.color.rgb2hex(this.toRgb());
|
|
|
55 |
}, toCss:function () {
|
|
|
56 |
return "rgb(" + this.toRgb().join() + ")";
|
|
|
57 |
}, toString:function () {
|
|
|
58 |
return this.toHex();
|
|
|
59 |
}, blend:function (color, weight) {
|
|
|
60 |
var rgb = null;
|
|
|
61 |
if (dojo.lang.isArray(color)) {
|
|
|
62 |
rgb = color;
|
|
|
63 |
} else {
|
|
|
64 |
if (color instanceof dojo.gfx.color.Color) {
|
|
|
65 |
rgb = color.toRgb();
|
|
|
66 |
} else {
|
|
|
67 |
rgb = new dojo.gfx.color.Color(color).toRgb();
|
|
|
68 |
}
|
|
|
69 |
}
|
|
|
70 |
return dojo.gfx.color.blend(this.toRgb(), rgb, weight);
|
|
|
71 |
}});
|
|
|
72 |
dojo.gfx.color.named = {white:[255, 255, 255], black:[0, 0, 0], red:[255, 0, 0], green:[0, 255, 0], lime:[0, 255, 0], blue:[0, 0, 255], navy:[0, 0, 128], gray:[128, 128, 128], silver:[192, 192, 192]};
|
|
|
73 |
dojo.gfx.color.blend = function (a, b, weight) {
|
|
|
74 |
if (typeof a == "string") {
|
|
|
75 |
return dojo.gfx.color.blendHex(a, b, weight);
|
|
|
76 |
}
|
|
|
77 |
if (!weight) {
|
|
|
78 |
weight = 0;
|
|
|
79 |
}
|
|
|
80 |
weight = Math.min(Math.max(-1, weight), 1);
|
|
|
81 |
weight = ((weight + 1) / 2);
|
|
|
82 |
var c = [];
|
|
|
83 |
for (var x = 0; x < 3; x++) {
|
|
|
84 |
c[x] = parseInt(b[x] + ((a[x] - b[x]) * weight));
|
|
|
85 |
}
|
|
|
86 |
return c;
|
|
|
87 |
};
|
|
|
88 |
dojo.gfx.color.blendHex = function (a, b, weight) {
|
|
|
89 |
return dojo.gfx.color.rgb2hex(dojo.gfx.color.blend(dojo.gfx.color.hex2rgb(a), dojo.gfx.color.hex2rgb(b), weight));
|
|
|
90 |
};
|
|
|
91 |
dojo.gfx.color.extractRGB = function (color) {
|
|
|
92 |
var hex = "0123456789abcdef";
|
|
|
93 |
color = color.toLowerCase();
|
|
|
94 |
if (color.indexOf("rgb") == 0) {
|
|
|
95 |
var matches = color.match(/rgba*\((\d+), *(\d+), *(\d+)/i);
|
|
|
96 |
var ret = matches.splice(1, 3);
|
|
|
97 |
return ret;
|
|
|
98 |
} else {
|
|
|
99 |
var colors = dojo.gfx.color.hex2rgb(color);
|
|
|
100 |
if (colors) {
|
|
|
101 |
return colors;
|
|
|
102 |
} else {
|
|
|
103 |
return dojo.gfx.color.named[color] || [255, 255, 255];
|
|
|
104 |
}
|
|
|
105 |
}
|
|
|
106 |
};
|
|
|
107 |
dojo.gfx.color.hex2rgb = function (hex) {
|
|
|
108 |
var hexNum = "0123456789ABCDEF";
|
|
|
109 |
var rgb = new Array(3);
|
|
|
110 |
if (hex.indexOf("#") == 0) {
|
|
|
111 |
hex = hex.substring(1);
|
|
|
112 |
}
|
|
|
113 |
hex = hex.toUpperCase();
|
|
|
114 |
if (hex.replace(new RegExp("[" + hexNum + "]", "g"), "") != "") {
|
|
|
115 |
return null;
|
|
|
116 |
}
|
|
|
117 |
if (hex.length == 3) {
|
|
|
118 |
rgb[0] = hex.charAt(0) + hex.charAt(0);
|
|
|
119 |
rgb[1] = hex.charAt(1) + hex.charAt(1);
|
|
|
120 |
rgb[2] = hex.charAt(2) + hex.charAt(2);
|
|
|
121 |
} else {
|
|
|
122 |
rgb[0] = hex.substring(0, 2);
|
|
|
123 |
rgb[1] = hex.substring(2, 4);
|
|
|
124 |
rgb[2] = hex.substring(4);
|
|
|
125 |
}
|
|
|
126 |
for (var i = 0; i < rgb.length; i++) {
|
|
|
127 |
rgb[i] = hexNum.indexOf(rgb[i].charAt(0)) * 16 + hexNum.indexOf(rgb[i].charAt(1));
|
|
|
128 |
}
|
|
|
129 |
return rgb;
|
|
|
130 |
};
|
|
|
131 |
dojo.gfx.color.rgb2hex = function (r, g, b) {
|
|
|
132 |
if (dojo.lang.isArray(r)) {
|
|
|
133 |
g = r[1] || 0;
|
|
|
134 |
b = r[2] || 0;
|
|
|
135 |
r = r[0] || 0;
|
|
|
136 |
}
|
|
|
137 |
var ret = dojo.lang.map([r, g, b], function (x) {
|
|
|
138 |
x = new Number(x);
|
|
|
139 |
var s = x.toString(16);
|
|
|
140 |
while (s.length < 2) {
|
|
|
141 |
s = "0" + s;
|
|
|
142 |
}
|
|
|
143 |
return s;
|
|
|
144 |
});
|
|
|
145 |
ret.unshift("#");
|
|
|
146 |
return ret.join("");
|
|
|
147 |
};
|
|
|
148 |
|