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CGGradient.j
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1 /*
2  * CGGradient.j
3  * AppKit
4  *
5  * Created by Francisco Tolmasky.
6  * Copyright 2008, 280 North, Inc.
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 
24 
27 
28 function CGGradientCreateWithColorComponents(aColorSpace, components, locations, count)
29 {
30  if (locations === undefined || locations === NULL)
31  {
32  var num_of_colors = components.length / 4,
33  locations = [];
34 
35  for (var idx = 0; idx < num_of_colors; idx++)
36  locations.push( idx / (num_of_colors - 1) );
37  }
38 
39  if (count === undefined || count === NULL)
40  count = locations.length;
41 
42  var colors = [];
43 
44  while (count--)
45  {
46  var offset = count * 4;
47  colors[count] = CGColorCreate(aColorSpace, components.slice(offset, offset + 4));
48  }
49 
50  return CGGradientCreateWithColors(aColorSpace, colors, locations);
51 }
52 
53 function CGGradientCreateWithColors(aColorSpace, colors, locations)
54 {
55  return { colorspace:aColorSpace, colors:colors, locations:locations };
56 }
57 
59 {
60 }
61 
62 function CGGradientRetain(aGradient)
63 {
64  return aGradient;
65 }