<?php
/**
* @author Gasper Kozak
* @copyright 2007-2011

This file is part of WideImage.

WideImage is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

WideImage is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with WideImage; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

* @package Internal/Mappers
**/

/**
 * Mapper class for PNG files
 *
 * @package Internal/Mappers
 */
class WideImage_Mapper_PNG
{
    function load($uri)
    {
        return @imagecreatefrompng($uri);
    }

    function save($handle, $uri = null, $compression = 9, $filters = PNG_ALL_FILTERS)
    {
        if ( $compression > 9 )
        {
            $compression *= 9 / 100;
        }

        return imagepng($handle, $uri, $compression, $filters);
    }
}
