Component-Builder/admin/compiler/joomla_3/wideimage/Operation/AsGrayscale.php

50 lines
1.4 KiB
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
**/
/**
* AsGrayscale operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_AsGrayscale
{
/**
* Returns a greyscale copy of an image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->asTrueColor();
if (!imagefilter($new->getHandle(), IMG_FILTER_GRAYSCALE))
throw new WideImage_GDFunctionResultException("imagefilter() returned false");
if (!$image->isTrueColor())
$new = $new->asPalette();
return $new;
}
}