<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Pdf

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Jpeg.php 23395 2010-11-19 15:30:47Z alexander $

 */

/** Internally used classes */

require_once 'Zend/Pdf/Element/Name.php';

require_once 'Zend/Pdf/Element/Numeric.php';

/** Zend_Pdf_Resource_Image */

require_once 'Zend/Pdf/Resource/Image.php';

/**

 * JPEG image

 *

 * @package    Zend_Pdf

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Pdf_Resource_Image_Jpeg extends Zend_Pdf_Resource_Image

{

    protected $_width;

    protected $_height;

    protected $_imageProperties;

    /**

     * Object constructor

     *

     * @param string $imageFileName

     * @throws Zend_Pdf_Exception

     */

    public function __construct($imageFileName)

    {

        if (!function_exists('gd_info')) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('Image extension is not installed.');

        }

        $gd_options = gd_info();

        if ( (!isset($gd_options['JPG Support'])  || $gd_options['JPG Support']  != true)  &&

             (!isset($gd_options['JPEG Support']) || $gd_options['JPEG Support'] != true)  ) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('JPG support is not configured properly.');

        }

        if (($imageInfo = getimagesize($imageFileName)) === false) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('Corrupted image or image doesn\'t exist.');

        }

        if ($imageInfo[2] != IMAGETYPE_JPEG && $imageInfo[2] != IMAGETYPE_JPEG2000) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('ImageType is not JPG');

        }

        parent::__construct();

        switch ($imageInfo['channels']) {

            case 3:

                $colorSpace = 'DeviceRGB';

                break;

            case 4:

                $colorSpace = 'DeviceCMYK';

                break;

            default:

                $colorSpace = 'DeviceGray';

                break;

        }

        $imageDictionary = $this->_resource->dictionary;

        $imageDictionary->Width            = new Zend_Pdf_Element_Numeric($imageInfo[0]);

        $imageDictionary->Height           = new Zend_Pdf_Element_Numeric($imageInfo[1]);

        $imageDictionary->ColorSpace       = new Zend_Pdf_Element_Name($colorSpace);

        $imageDictionary->BitsPerComponent = new Zend_Pdf_Element_Numeric($imageInfo['bits']);

        if ($imageInfo[2] == IMAGETYPE_JPEG) {

            $imageDictionary->Filter       = new Zend_Pdf_Element_Name('DCTDecode');

        } else if ($imageInfo[2] == IMAGETYPE_JPEG2000){

            $imageDictionary->Filter       = new Zend_Pdf_Element_Name('JPXDecode');

        }

        if (($imageFile = @fopen($imageFileName, 'rb')) === false ) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception( "Can not open '$imageFileName' file for reading." );

        }

        $byteCount = filesize($imageFileName);

        $this->_resource->value = '';

        while ($byteCount > 0 && !feof($imageFile)) {

            $nextBlock = fread($imageFile, $byteCount);

            if ($nextBlock === false) {

                require_once 'Zend/Pdf/Exception.php';

                throw new Zend_Pdf_Exception( "Error occured while '$imageFileName' file reading." );

            }

            $this->_resource->value .= $nextBlock;

            $byteCount -= strlen($nextBlock);

        }

        if ($byteCount != 0) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception( "Error occured while '$imageFileName' file reading." );

        }

        fclose($imageFile);

        $this->_resource->skipFilters();

        $this->_width  = $imageInfo[0];

        $this->_height = $imageInfo[1];

        $this->_imageProperties = array();

        $this->_imageProperties['bitDepth'] = $imageInfo['bits'];

        $this->_imageProperties['jpegImageType'] = $imageInfo[2];

        $this->_imageProperties['jpegColorType'] = $imageInfo['channels'];

    }

    /**

     * Image width

     */

    public function getPixelWidth() {

        return $this->_width;

    }

    /**

     * Image height

     */

    public function getPixelHeight() {

        return $this->_height;

    }

    /**

     * Image properties

     */

    public function getProperties() {

        return $this->_imageProperties;

    }

}