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Path: /data/applications/aps/gallery/2.3-2/standard/htdocs/modules/dcraw/classes/ [ Home ]
File: DcrawToolkit.class
<?php
/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2008 Bharat Mediratta
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 */

GalleryCoreApi::requireOnce('modules/core/classes/GalleryToolkit.class');
GalleryCoreApi::requireOnce('modules/dcraw/classes/DcrawToolkitHelper.class');

/**
 * A Dcraw version of GalleryToolkit
 * @package Dcraw
 * @subpackage Classes
 * @author Vallimar <vallimar@sexorcisto.net>
 * @author Bharat Mediratta <bharat@menalto.com>
 * @version $Revision: 17580 $
 */
class DcrawToolkit extends GalleryToolkit {

    /**
     * @see GalleryToolkit::getProperty
     */
    function getProperty($mimeType, $propertyName, $sourceFilename) {
	global $gallery;

	if (!in_array($mimeType, array('image/x-dcraw', 'image/x-adobe-dng'))) {
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION), null);
	}

	switch ($propertyName) {
	case 'dimensions':
	    /*
	     * @todo In dcraw v7.90 or newer we can get dimensions directly from dcraw -i -v.
	     * For older dcraw versions we'll look to see if there's another toolkit that
	     * supports dimensions for PPM.  If we find one, then convert the image to PPM
	     * and let that toolkit tell us its dimensions.
	     */
	    list ($ret, $toolkit) =
		GalleryCoreApi::getToolkitByProperty('image/x-portable-pixmap', 'dimensions');
	    if ($ret) {
		return array($ret, null);
	    }

	    if (isset($toolkit)) {
		$platform =& $gallery->getPlatform();
		$tempfile = $platform->tempnam($gallery->getConfig('data.gallery.tmp'), 'dcrw_');
		list ($ret, $outputMimeType, $context) = $this->performOperation(
		    'image/x-dcraw', 'convert-to-image/x-portable-pixmap', $sourceFilename,
		    $tempfile, array(), array());
		if ($ret) {
		    return array($ret, null);
		}

		/* We now have a PPM file, get its dimensions */
		list ($ret, $results) =
		    $toolkit->getProperty('image/x-portable-pixmap', 'dimensions', $tempfile);
		$platform->unlink($tempfile);
		if ($ret) {
		    return array($ret, null);
		}
	    } else {
		/* We have no idea :-( */
		$results = array(0, 0);
	    }
	    break;

	default:
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION), null);
	}

	return array(null, $results);
    }

    /**
     * @see GalleryToolkit::performOperation
     */
    function performOperation($mimeType, $operationName, $sourceFilename,
			      $destFilename, $parameters, $context=array()) {
	global $gallery;

	if (!in_array($mimeType, array('image/x-dcraw', 'image/x-adobe-dng'))) {
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION), null, null);
	}

	switch ($operationName) {
	case 'convert-to-image/x-portable-pixmap':
	    list ($ret, $dcraw) = GalleryCoreApi::getPluginParameter('module', 'dcraw', 'path');
	    if ($ret) {
		return array($ret, null, null);
	    }

	    $tmpDir = $gallery->getConfig('data.gallery.tmp');
	    $platform =& $gallery->getPlatform();
	    $tmpFilename = $platform->tempnam($tmpDir, 'dcraw_');
	    if (empty($tmpFilename)) {
		/* This can happen if the $tmpDir path is bad */
		return array(GalleryCoreApi::error(ERROR_BAD_PATH), null, null);
	    }

	    list ($ret, $version) =
		GalleryCoreApi::getPluginParameter('module', 'dcraw', 'version');
	    if ($ret) {
		return array($ret, null, null);
	    }

	    /*
	     * Interpolation setting.  Using high speed / lower quality setting by default.
	     * If desired, change '0' to a different value for dcraw 7.73+ or remove the '-q'
	     * for older versions.  See http://cybercom.net/~dcoffin/dcraw/dcraw.1.html
	     */
	    if (version_compare($version, '7.73', '>=')) {
		$cmd = array($dcraw, '-c', '-a', '-q', '0', $sourceFilename, '>', $tmpFilename);
	    } else {
		$cmd = array($dcraw, '-c', '-a', '-q', $sourceFilename, '>', $tmpFilename);
	    }

	    $gallery->guaranteeTimeLimit(90);
	    list ($success, $output) = $platform->exec(array($cmd));
	    if (!$success) {
		@$platform->unlink($tmpFilename);
		return array(GalleryCoreApi::error(ERROR_TOOLKIT_FAILURE),
			     null, null);
	    }

	    $success = $platform->rename($tmpFilename, $destFilename);
	    if (!$success) {
		@$platform->unlink($tmpFilename);
		return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE, __FILE__, __LINE__,
						  "Failed renaming $tmpFilename -> $destFilename"),
			     null, null);
	    }
	    $platform->chmod($destFilename);

	    return array(null, 'image/x-portable-pixmap', $context);

	default:
	    return array(GalleryCoreApi::error(ERROR_UNSUPPORTED_OPERATION), null, null);
	}
    }
}
?>