1: | <?php |
2: | /** |
3: | ##DOC-SIGNATURE## |
4: | |
5: | This file is part of WideImage. |
6: | |
7: | WideImage is free software; you can redistribute it and/or modify |
8: | it under the terms of the GNU Lesser General Public License as published by |
9: | the Free Software Foundation; either version 2.1 of the License, or |
10: | (at your option) any later version. |
11: | |
12: | WideImage is distributed in the hope that it will be useful, |
13: | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14: | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15: | GNU Lesser General Public License for more details. |
16: | |
17: | You should have received a copy of the GNU Lesser General Public License |
18: | along with WideImage; if not, write to the Free Software |
19: | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
20: | |
21: | * @package Internal/Operations |
22: | **/ |
23: | |
24: | namespace WideImage\Operation; |
25: | |
26: | use WideImage\TrueColorImage; |
27: | |
28: | /** |
29: | * CopyChannelsTrueColor operation class |
30: | * |
31: | * Used to perform CopyChannels operation on truecolor images |
32: | * |
33: | * @package Internal/Operations |
34: | */ |
35: | class CopyChannelsTrueColor { |
36: | /** |
37: | * Returns an image with only specified channels copied |
38: | * |
39: | * @param \WideImage\Image $img |
40: | * @param array $channels |
41: | * @return \WideImage\Image |
42: | */ |
43: | public function execute($img, $channels) |
44: | { |
45: | $blank = array('red' => 0, 'green' => 0, 'blue' => 0, 'alpha' => 0); |
46: | |
47: | $width = $img->getWidth(); |
48: | $height = $img->getHeight(); |
49: | $copy = TrueColorImage::create($width, $height); |
50: | |
51: | if (count($channels) > 0) { |
52: | for ($x = 0; $x < $width; $x++) { |
53: | for ($y = 0; $y < $height; $y++) { |
54: | $RGBA = $img->getRGBAt($x, $y); |
55: | $newRGBA = $blank; |
56: | |
57: | foreach ($channels as $channel) { |
58: | $newRGBA[$channel] = $RGBA[$channel]; |
59: | } |
60: | |
61: | $color = $copy->getExactColorAlpha($newRGBA); |
62: | |
63: | if ($color == -1) { |
64: | $color = $copy->allocateColorAlpha($newRGBA); |
65: | } |
66: | |
67: | $copy->setColorAt($x, $y, $color); |
68: | } |
69: | } |
70: | } |
71: | |
72: | return $copy; |
73: | } |
74: | } |
75: |