<?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; } }