Файл: outs/wideimage/Operation/CopyChannelsPalette.php
Строк: 89
<?php
/**
* @author Gasper Kozak
* @copyright 2007-2011
This file is part of WideImage.
WideImage is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
WideImage is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with WideImage; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* @package Internal/Operations
**/
/**
* CopyChannelsPalette operation class
*
* This operation is intended to be used on palette images
*
* @package Internal/Operations
*/
class WideImage_Operation_CopyChannelsPalette
{
/**
* Returns an image with only specified channels copied
*
* @param WideImage_PaletteImage $img
* @param array $channels
* @return WideImage_PaletteImage
*/
function execute($img, $channels)
{
$blank = array('red' => 0, 'green' => 0, 'blue' => 0);
if (isset($channels['alpha']))
unset($channels['alpha']);
$width = $img->getWidth();
$height = $img->getHeight();
$copy = WideImage_PaletteImage::create($width, $height);
if ($img->isTransparent())
{
$otci = $img->getTransparentColor();
$TRGB = $img->getColorRGB($otci);
$tci = $copy->allocateColor($TRGB);
}
else
{
$otci = null;
$tci = null;
}
for ($x = 0; $x < $width; $x++)
for ($y = 0; $y < $height; $y++)
{
$ci = $img->getColorAt($x, $y);
if ($ci === $otci)
{
$copy->setColorAt($x, $y, $tci);
continue;
}
$RGB = $img->getColorRGB($ci);
$newRGB = $blank;
foreach ($channels as $channel)
$newRGB[$channel] = $RGB[$channel];
$color = $copy->getExactColor($newRGB);
if ($color == -1)
$color = $copy->allocateColor($newRGB);
$copy->setColorAt($x, $y, $color);
}
if ($img->isTransparent())
$copy->setTransparentColor($tci);
return $copy;
}
}