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<?php
/**
* Part of the Joomla Framework Image Package
*
* @copyright Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Image;
use Psr\Log\NullLogger;
use Psr\Log\LoggerInterface;
use Psr\Log\LoggerAwareInterface;
/**
* Class to manipulate an image.
*
* @since 1.0
* @deprecated The joomla/image package is deprecated
*/
abstract class ImageFilter implements LoggerAwareInterface
{
/**
* @var resource The image resource handle.
* @since 1.0
*/
protected $handle;
/**
* @var LoggerInterface Logger object
* @since 1.0
*/
protected $logger = null;
/**
* Class constructor.
*
* @param resource $handle The image resource on which to apply the filter.
*
* @since 1.0
* @throws \InvalidArgumentException
* @throws \RuntimeException
*/
public function __construct($handle)
{
// Verify that image filter support for PHP is available.
if (!function_exists('imagefilter'))
{
// @codeCoverageIgnoreStart
$this->getLogger()->error('The imagefilter function for PHP is not available.');
throw new \RuntimeException('The imagefilter function for PHP is not available.');
// @codeCoverageIgnoreEnd
}
// Make sure the file handle is valid.
if (!is_resource($handle) || (get_resource_type($handle) != 'gd'))
{
$this->getLogger()->error('The image handle is invalid for the image filter.');
throw new \InvalidArgumentException('The image handle is invalid for the image filter.');
}
$this->handle = $handle;
}
/**
* Get the logger.
*
* @return LoggerInterface
*
* @since 1.0
*/
public function getLogger()
{
// If a logger hasn't been set, use NullLogger
if (! ($this->logger instanceof LoggerInterface))
{
$this->logger = new NullLogger;
}
return $this->logger;
}
/**
* Sets a logger instance on the object
*
* @param LoggerInterface $logger A PSR-3 compliant logger.
*
* @return Image This object for message chaining.
*
* @since 1.0
*/
public function setLogger(LoggerInterface $logger)
{
$this->logger = $logger;
return $this;
}
/**
* Method to apply a filter to an image resource.
*
* @param array $options An array of options for the filter.
*
* @return void
*
* @since 1.0
*/
abstract public function execute(array $options = array());
}