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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\CMS\Image\Filter;
\defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Image\ImageFilter;
/**
* Image Filter class adjust the contrast of an image.
*
* @since 2.5.0
*/
class Contrast extends ImageFilter
{
/**
* 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
* @throws \InvalidArgumentException
*/
public function execute(array $options = [])
{
// Validate that the contrast value exists and is an integer.
if (!isset($options[IMG_FILTER_CONTRAST]) || !\is_int($options[IMG_FILTER_CONTRAST]))
{
throw new \InvalidArgumentException('No valid contrast value was given. Expected integer.');
}
// Perform the contrast filter.
imagefilter($this->handle, IMG_FILTER_CONTRAST, $options[IMG_FILTER_CONTRAST]);
}
}