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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  for (var idx = 0; idx < num_of_colors; idx++)
35  locations.push( idx / (num_of_colors - 1) );
36  }
37 
38  if (count === undefined || count === NULL)
39  count = locations.length;
40 
41  var colors = [];
42 
43  while (count--)
44  {
45  var offset = count * 4;
46  colors[count] = CGColorCreate(aColorSpace, components.slice(offset, offset + 4));
47  }
48 
49  return CGGradientCreateWithColors(aColorSpace, colors, locations);
50 }
51 
52 function CGGradientCreateWithColors(aColorSpace, colors, locations)
53 {
54  return { colorspace:aColorSpace, colors:colors, locations:locations };
55 }
56 
58 {
59 }
60 
61 function CGGradientRetain(aGradient)
62 {
63  return aGradient;
64 }