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<?php /** * Joomla! Content Management System * * @copyright (C) 2017 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Image; // phpcs:disable PSR1.Files.SideEffects \defined('_JEXEC') or die; // phpcs:enable PSR1.Files.SideEffects /** * Class to manipulate an image. * * @since 1.7.3 */ abstract class ImageFilter { /** * @var \GdImage The image resource handle. * @since 2.5.0 */ protected $handle; /** * Class constructor. * * @param resource $handle The image resource on which to apply the filter. * * @since 1.7.3 * @throws \InvalidArgumentException * @throws \RuntimeException */ public function __construct($handle) { // Verify that image filter support for PHP is available. if (!\function_exists('imagefilter')) { throw new \RuntimeException('The imagefilter function for PHP is not available.'); } // Make sure the file handle is valid. if (!(\is_object($handle) && \get_class($handle) == 'GdImage')) { throw new \InvalidArgumentException('The image handle is invalid for the image filter.'); } $this->handle = $handle; } /** * Method to apply a filter to an image resource. * * @param array $options An array of options for the filter. * * @return void * * @since 2.5.0 */ abstract public function execute(array $options = []); }
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