/home/edulekha/studygroup.edulekha.com/ow_libraries/wideimage/Operation/Merge.php
<?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
**/
/**
* Merge operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Merge
{
/**
* Returns a merged image
*
* @param WideImage_Image $base
* @param WideImage_Image $overlay
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param numeric $pct
* @return WideImage_Image
*/
function execute($base, $overlay, $left, $top, $pct)
{
$x = WideImage_Coordinate::fix($left, $base->getWidth(), $overlay->getWidth());
$y = WideImage_Coordinate::fix($top, $base->getHeight(), $overlay->getHeight());
$result = $base->asTrueColor();
$result->alphaBlending(true);
$result->saveAlpha(true);
if ($pct <= 0)
return $result;
if ($pct < 100)
{
if (!imagecopymerge(
$result->getHandle(),
$overlay->getHandle(),
$x, $y, 0, 0,
$overlay->getWidth(),
$overlay->getHeight(),
$pct))
throw new WideImage_GDFunctionResultException("imagecopymerge() returned false");
}
else
{
if (!imagecopy(
$result->getHandle(),
$overlay->getHandle(),
$x, $y, 0, 0,
$overlay->getWidth(),
$overlay->getHeight()))
throw new WideImage_GDFunctionResultException("imagecopy() returned false");
}
return $result;
}
}