<?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 **/ /** * Crop operation class * * @package Internal/Operations */ class WideImage_Operation_Crop { /** * Returns a cropped image * * @param WideImage_Image $img * @param smart_coordinate $left * @param smart_coordinate $top * @param smart_coordinate $width * @param smart_coordinate $height * @return WideImage_Image */ function execute($img, $left, $top, $width, $height) { $width = WideImage_Coordinate::fix($width, $img->getWidth(), $width); $height = WideImage_Coordinate::fix($height, $img->getHeight(), $height); $left = WideImage_Coordinate::fix($left, $img->getWidth(), $width); $top = WideImage_Coordinate::fix($top, $img->getHeight(), $height); if ($left < 0) { $width = $left + $width; $left = 0; } if ($width > $img->getWidth() - $left) $width = $img->getWidth() - $left; if ($top < 0) { $height = $top + $height; $top = 0; } if ($height > $img->getHeight() - $top) $height = $img->getHeight() - $top; if ($width <= 0 || $height <= 0) throw new WideImage_Exception("Can't crop outside of an image."); $new = $img->doCreate($width, $height); if ($img->isTransparent() || $img instanceof WideImage_PaletteImage) { $new->copyTransparencyFrom($img); if (!imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height)) throw new WideImage_GDFunctionResultException("imagecopyresized() returned false"); } else { $new->alphaBlending(false); $new->saveAlpha(true); if (!imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height)) throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false"); } return $new; } }