image.php

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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Document
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * DocumentImage class, provides an easy interface to output image data
 *
 * @package     Joomla.Platform
 * @subpackage  Document
 * @since       12.1
 */
class JDocumentImage extends JDocument
{
        /**
         * Class constructor
         *
         * @param   array  $options  Associative array of options
         *
         * @since   12.1
         */
        public function __construct($options = array())
        {
                parent::__construct($options);

                // Set mime type
                $this->_mime = 'image/png';

                // Set document type
                $this->_type = 'image';
        }

        /**
         * Render the document.
         *
         * @param   boolean  $cache   If true, cache the output
         * @param   array    $params  Associative array of attributes
         *
         * @return  The rendered data
         *
         * @since   12.1
         */
        public function render($cache = false, $params = array())
        {
                // Get the image type
                $type = JFactory::getApplication()->input->get('type', 'png');

                switch ($type)
                {
                        case 'jpg':
                        case 'jpeg':
                                $this->_mime = 'image/jpeg';
                                break;
                        case 'gif':
                                $this->_mime = 'image/gif';
                                break;
                        case 'png':
                        default:
                                $this->_mime = 'image/png';
                                break;
                }

                $this->_charset = null;

                parent::render();
                return $this->getBuffer();
        }
}