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<?php
/**
* @copyright Copyright (c) 2009-2017 Ryan Demmer. All rights reserved
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved
* @license GNU/GPL 2 or later - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* JCE is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
*
* Based on JImage library from Joomla.Platform 11.3
*/
defined('_JEXEC') or die;
/**
* Image Filter class adjust the smoothness of an image.
*/
class WFImageImagickFilterSepia extends WFImageImagickFilter
{
/**
* Method to apply a filter to an image resource.
*
* @param array $options An array of options for the filter
*
* @throws InvalidArgumentException
* @throws RuntimeException
*/
public function execute(array $options = array())
{
// Verify that image filter support for PHP is available.
if (!function_exists('imagefilter')) {
throw new RuntimeException('The imagefilter function for PHP is not available.');
}
if (empty($options)) {
throw new InvalidArgumentException('No valid amount was given. Expected float.');
}
$amount = (int) array_shift($options);
// Microsoft sepia
$ms_sepia = array(
0.393, 0.769, 0.189,
0.349, 0.686, 0.168,
0.272, 0.534, 0.131,
);
// colour offset (normalized)
$r = round(39 / 255, 3);
$g = round(14 / 255, 3);
$b = round(-36 / 255, 3);
// matrix with greyscale and rgb offsets
$sepia = array(
0.299, 0.587, 0.114, 0, 0, $r,
0.299, 0.587, 0.114, 0, 0, $g,
0.299, 0.587, 0.114, 0, 0, $b,
0, 0, 0, 1, 0, 0,
0, 0, 0, 0, 1, 0,
0, 0, 0, 0, 0, 1,
);
$this->handle->recolorImage($ms_sepia);
}
}