| 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: |