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COPYING-AGPL

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  • image.php 27.37 KiB
    <?php
    
    /**
    * ownCloud
    *
    * @author Thomas Tanghus
    * @copyright 2011 Thomas Tanghus <thomas@tanghus.net>
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
    * License as published by the Free Software Foundation; either
    * version 3 of the License, or 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 AFFERO GENERAL PUBLIC LICENSE for more details.
    *
    * You should have received a copy of the GNU Affero General Public
    * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
    *
    */
    /**
     * Class for basic image manipulation
     */
    class OC_Image {
    	protected $resource = false; // tmp resource.
    	protected $imagetype = IMAGETYPE_PNG; // Default to png if file type isn't evident.
    	protected $bit_depth = 24;
    	protected $filepath = null;
    
    	/**
    	* @brief Get mime type for an image file.
    	* @param $filepath The path to a local image file.
    	* @returns string The mime type if the it could be determined, otherwise an empty string.
    	*/
    	static public function getMimeTypeForFile($filepath) {
    		$imagetype = exif_imagetype($filepath);
    		return $imagetype ? image_type_to_mime_type($imagetype) : '';
    	}
    
    	/**
    	* @brief Constructor.
    	* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function.
    	* @returns bool False on error
    	*/
    	public function __construct($imageref = null) {
    		//OC_Log::write('core',__METHOD__.'(): start', OC_Log::DEBUG);
    		if(!extension_loaded('gd') || !function_exists('gd_info')) {
    			OC_Log::write('core', __METHOD__.'(): GD module not installed', OC_Log::ERROR);
    			return false;
    		}
    		if(!is_null($imageref)) {
    			$this->load($imageref);
    		}
    	}
    
    	/**
    	* @brief Determine whether the object contains an image resource.
    	* @returns bool
    	*/
    	public function valid() { // apparently you can't name a method 'empty'...
    		return is_resource($this->resource);
    	}
    
    	/**
    	* @brief Returns the MIME type of the image or an empty string if no image is loaded.
    	* @returns int
    	*/
    	public function mimeType() {