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<?php
/**
* @package Joomla.Platform
* @subpackage Image
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Class to manipulate an image.
*
* @since 11.3
*/
abstract class JImageFilter
{
/**
* @var resource The image resource handle.
* @since 11.3
*/
protected $handle;
/**
* Class constructor.
*
* @param resource $handle The image resource on which to apply the filter.
*
* @since 11.3
* @throws InvalidArgumentException
* @throws RuntimeException
*/
public function __construct($handle)
{
// Verify that image filter support for PHP is available.
if (!function_exists('imagefilter'))
{
// @codeCoverageIgnoreStart
JLog::add('The imagefilter function for PHP is not available.', JLog::ERROR);
throw new RuntimeException('The imagefilter function for PHP is not available.');
// @codeCoverageIgnoreEnd
}
// Make sure the file handle is valid.
if (!is_resource($handle) || (get_resource_type($handle) != 'gd'))
{
JLog::add('The image handle is invalid for the image filter.', JLog::ERROR);
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 11.3
*/
abstract public function execute(array $options = array());
}