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<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library 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.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */


/**
 * PHPExcel_Worksheet_MemoryDrawing
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Worksheet_MemoryDrawing extends PHPExcel_Worksheet_BaseDrawing implements PHPExcel_IComparable
{
        /* Rendering functions */
        const RENDERING_DEFAULT                                 = 'imagepng';
        const RENDERING_PNG                                             = 'imagepng';
        const RENDERING_GIF                                             = 'imagegif';
        const RENDERING_JPEG                                    = 'imagejpeg';

        /* MIME types */
        const MIMETYPE_DEFAULT                                  = 'image/png';
        const MIMETYPE_PNG                                              = 'image/png';
        const MIMETYPE_GIF                                              = 'image/gif';
        const MIMETYPE_JPEG                                             = 'image/jpeg';

        /**
         * Image resource
         *
         * @var resource
         */
        private $_imageResource;

        /**
         * Rendering function
         *
         * @var string
         */
        private $_renderingFunction;

        /**
         * Mime type
         *
         * @var string
         */
        private $_mimeType;

        /**
         * Unique name
         *
         * @var string
         */
        private $_uniqueName;

    /**
     * Create a new PHPExcel_Worksheet_MemoryDrawing
     */
    public function __construct()
    {
        // Initialise values
        $this->_imageResource           = null;
        $this->_renderingFunction       = self::RENDERING_DEFAULT;
        $this->_mimeType                        = self::MIMETYPE_DEFAULT;
        $this->_uniqueName                      = md5(rand(0, 9999). time() . rand(0, 9999));

        // Initialize parent
        parent::__construct();
    }

    /**
     * Get image resource
     *
     * @return resource
     */
    public function getImageResource() {
        return $this->_imageResource;
    }

    /**
     * Set image resource
     *
     * @param   $value resource
     * @return PHPExcel_Worksheet_MemoryDrawing
     */
    public function setImageResource($value = null) {
        $this->_imageResource = $value;

        if (!is_null($this->_imageResource)) {
                // Get width/height
                $this->_width   = imagesx($this->_imageResource);
                $this->_height  = imagesy($this->_imageResource);
        }
        return $this;
    }

    /**
     * Get rendering function
     *
     * @return string
     */
    public function getRenderingFunction() {
        return $this->_renderingFunction;
    }

    /**
     * Set rendering function
     *
     * @param string $value
     * @return PHPExcel_Worksheet_MemoryDrawing
     */
    public function setRenderingFunction($value = PHPExcel_Worksheet_MemoryDrawing::RENDERING_DEFAULT) {
        $this->_renderingFunction = $value;
        return $this;
    }

    /**
     * Get mime type
     *
     * @return string
     */
    public function getMimeType() {
        return $this->_mimeType;
    }

    /**
     * Set mime type
     *
     * @param string $value
     * @return PHPExcel_Worksheet_MemoryDrawing
     */
    public function setMimeType($value = PHPExcel_Worksheet_MemoryDrawing::MIMETYPE_DEFAULT) {
        $this->_mimeType = $value;
        return $this;
    }

    /**
     * Get indexed filename (using image index)
     *
     * @return string
     */
    public function getIndexedFilename() {
                $extension      = strtolower($this->getMimeType());
                $extension      = explode('/', $extension);
                $extension      = $extension[1];

        return $this->_uniqueName . $this->getImageIndex() . '.' . $extension;
    }

        /**
         * Get hash code
         *
         * @return string       Hash code
         */
        public function getHashCode() {
        return md5(
                  $this->_renderingFunction
                . $this->_mimeType
                . $this->_uniqueName
                . parent::getHashCode()
                . __CLASS__
        );
    }

        /**
         * Implement PHP __clone to create a deep clone, not just a shallow copy.
         */
        public function __clone() {
                $vars = get_object_vars($this);
                foreach ($vars as $key => $value) {
                        if (is_object($value)) {
                                $this->$key = clone $value;
                        } else {
                                $this->$key = $value;
                        }
                }
        }
}