openrat-cms

Image.class.php (5885B)

---

 <?php
 namespace cms\model;
 // OpenRat Content Management System
 // Copyright (C) 2002-2012 Jan Dankert, cms@jandankert.de
 //
 // 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 use cms\base\Configuration;
 
 
 /**
  * Datei.
  *
  * @author Jan Dankert
  * @package openrat.objects
  */
 class Image extends File
 {
 	/**
 	 * Breite eines Bildes. Ist nur verfuegbar, wenn vorher
 	 * #getImageSize() aufgerufen wurde.
 	 */
 	var $width         = null;
 	
 	/**
 	 * Hoehe eines Bildes. Ist nur verfuegbar, wenn vorher
 	 * #getImageSize() aufgerufen wurde.
 	 */
 	var $height        = null;
 	
 
 	/**
 	 * Konstruktor
 	 *
 	 * @param Objekt-Id
 	 */
 	function __construct( $objectid='' )
 	{
 	    parent::__construct($objectid);
 
         $this->isImage = true;
         $this->isFile  = false;
 		$this->typeid = BaseObject::TYPEID_FILE;
 	}
 
 
 
 
 	/**
 	 * Ermittelt Breite und H�he des Bildes.<br>
 	 * Die Werte lassen sich anschlie�end �ber die Eigenschaften "width" und "height" ermitteln.
 	 */
 	function getImageSize()
 	{
 		if	( is_null($this->width) )
 		{
 			$this->write(); // Datei schreiben
 			
 			// Bildinformationen ermitteln
 			$size = getimagesize( $this->getCache()->getFilename() );
 	
 			// Breite und Hoehe des aktuellen Bildes	 
 			$this->width  = $size[0]; 
 			$this->height = $size[1];
 		}
 	}
 
 
 
 	/**
 	 * Veraendert die Bildgroesse eines Bildes
 	 *
 	 * Diese Methode sollte natuerlich nur bei Bildern ausgefuehrt werden.
 	 *
 	 * @param int Neue Breite
 	 * @param int Neue Hoehe
 	 * @param float Bildgr��enfaktor
 	 * @param int Altes Format als Integer-Konstante IMG_xxx
 	 * @param int Neues Format als Integer-Konstante IMG_xxx
 	 * @param int Jpeg-Qualitaet (sofern neues Format = Jpeg)
 	 */
 	function imageResize( $newWidth,$newHeight,$factor,$oldformat,$newformat,$jpegquality )
 	{
 		$this->write(); // Datei schreiben
 		
 		// Bildinformationen ermitteln
 		$size = getimagesize( $this->getCache()->getFilename() );
 
 		// Breite und Hoehe des aktuellen Bildes	 
 		$oldWidth  = $size[0]; 
 		$oldHeight = $size[1];
 		$aspectRatio = $oldHeight / $oldWidth; // Seitenverhaeltnis
 
 		// Wenn Breite und Hoehe fehlen, dann Bildgroesse beibehalten
 		if	( $newWidth == 0 && $newHeight == 0)
 		{
 			if	( $factor != 0 && $factor != 1 )
 			{
 				$newWidth  = $oldWidth  * $factor; 
 				$newHeight = $oldHeight * $factor;
 				$resizing = true;
 			}
 			else
 			{
 				$newWidth  = $oldWidth; 
 				$newHeight = $oldHeight;
 				$resizing = false;
 			}
 		}
 		else
 		{
 			$resizing = true;
 		}
 
 		// Wenn nur Breite oder Hoehe angegeben ist, dann
 		// das Seitenverhaeltnis beibehalten
 		if	( $newWidth == 0 )
 			$newWidth = $newHeight / $aspectRatio; 
 		
 		if	( $newHeight == 0 )
 			$newHeight = $newWidth * $aspectRatio; 
 
 
 		switch( $oldformat )
 		{
 			case IMG_GIF: // GIF
 
 				$oldImage = ImageCreateFromGIF( $this->tmpfile ); 
 				break;
 
 			case IMG_JPG: // JPEG
 
 				$oldImage = ImageCreateFromJPEG($this->tmpfile);
 				break;
 
 			case IMG_PNG: // PNG
 
 				$oldImage = imagecreatefrompng($this->tmpfile);
 				break;
 
 			default:
 				throw new \LogicException('unsupported image format "'.$this->extension.'", cannot load image. resize failed');
 		}
 
 		// Ab Version 2 der GD-Bibliothek sind TrueColor-Umwandlungen moeglich.
  		$hasTrueColor = Configuration::get(['image','truecolor']);
 
 		switch( $newformat )
 		{
 			case IMG_GIF: // GIF
 
 				if	( $resizing )
 				{
 					$newImage = ImageCreate($newWidth,$newHeight); 
 					ImageCopyResized($newImage,$oldImage,0,0,0,0,$newWidth,
 						$newHeight,$oldWidth,$oldHeight); 
 				}
 				else
 				{
 					$newImage = &$oldImage;
 				} 
 
 				ImageGIF($newImage, $this->getCache()->getFilename() );
 				$this->extension = 'gif';
 
 				break;
 
 			case IMG_JPG: // JPEG
 
 				if	( !$resizing )
 				{
 					$newImage = &$oldImage;
 				} 
 				elseif   ( $hasTrueColor )
 				{
 					// Verwende TrueColor (GD2)
 					$newImage = imageCreateTrueColor( $newWidth,$newHeight );
 					ImageCopyResampled($newImage,$oldImage,0,0,0,0,$newWidth,
 					$newHeight,$oldWidth,$oldHeight);
 				}
 				else
 				{
 					// GD Version 1.x unterstuetzt kein TrueColor
 					$newImage = ImageCreate($newWidth,$newHeight);
 	
 					ImageCopyResized($newImage,$oldImage,0,0,0,0,$newWidth,
 					$newHeight,$oldWidth,$oldHeight);
 				}
 	
 				ImageJPEG($newImage, $this->tmpfile,$jpegquality ); 
 				$this->extension = 'jpeg';
 
 				break;
 
 			case IMG_PNG: // PNG
 
 				if	( !$resizing )
 				{
 					$newImage = &$oldImage;
 				} 
 				elseif   ( $hasTrueColor )
 				{
 					// Verwende TrueColor (GD2)
 					$newImage = imageCreateTrueColor( $newWidth,$newHeight );
 		
 					ImageCopyResampled($newImage,$oldImage,0,0,0,0,$newWidth,
 					$newHeight,$oldWidth,$oldHeight); 
 				}
 				else
 				{
 					// GD Version 1.x unterstuetzt kein TrueColor
 					$newImage = ImageCreate($newWidth,$newHeight);
 		
 					ImageCopyResized($newImage,$oldImage,0,0,0,0,$newWidth,
 					$newHeight,$oldWidth,$oldHeight); 
 				}
 		
 				imagepng( $newImage,$this->getCache()->getFilename() );
 				$this->extension = 'png';
 				
 				break;
 				
 			default:
 				throw new \LogicException('unsupported image format "'.$newformat.'", cannot resize');
 		} 
 
 		$this->getCache()->invalidate();
 
 		imagedestroy( $oldImage );
 		//imagedestroy( $newImage );
 	}
 
 }
 
 ?>