<?
/* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 08/11/06
* Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
* 
* 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: 
* http://www.gnu.org/licenses/gpl.html
*
*/
 
class SimpleImage {
   
   var $image;
   var $image_type;
 
   function load($filename) {
      $image_info = getimagesize($filename);
      $this->image_type = $image_info[2];
      if( $this->image_type == IMAGETYPE_JPEG ) {
         $this->image = imagecreatefromjpeg($filename);
      } elseif( $this->image_type == IMAGETYPE_GIF ) {
         $this->image = imagecreatefromgif($filename);
      } elseif( $this->image_type == IMAGETYPE_PNG ) {
         $this->image = imagecreatefrompng($filename);
      }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image,$filename,$compression);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($this->image,$filename);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($this->image,$filename);
      }   
      if( $permissions != null) {
         chmod($filename,$permissions);
      }
   }
   function output($image_type=IMAGETYPE_JPEG) {
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($this->image);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($this->image);
      }   
   }
   function getWidth() {
      return imagesx($this->image);
   }
   function getHeight() {
      return imagesy($this->image);
   }
   function resizeToHeight($height) {
      $ratio = $height / $this->getHeight();
      $width = $this->getWidth() * $ratio;
      $this->resize($width,$height);
   }
   function resizeToWidth($width) {
      $ratio = $width / $this->getWidth();
      $height = $this->getheight() * $ratio;
      $this->resize($width,$height);
   }
   function scale($scale) {
      $width = $this->getWidth() * $scale/100;
      $height = $this->getheight() * $scale/100; 
      $this->resize($width,$height);
   }
   function resize($width,$height) {
      $new_image = imagecreatetruecolor($width, $height);
      imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
      $this->image = $new_image;   
   }      
} 

#coded for #CMS - CMS Made Simple
#by (c)2007 by Tina Keil (blackyfreud@gmail.com)
#Version 1.0 - 26.06.2007
#This project's homepage is: http://cmsmadesimple.sf.net
#
#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

	//settings - change them as you need
	define("USE_FRONTENDUSERS_MODULE", false); //do you use the frontenduser module?
	define("DELIVER_CHUNKED", true); //enable if you have trouble with large files
	//you can add or remove file types here as needed
	$allowed_filetypes = array('.pdf','.jpg','.gif','.png','.doc','.rtf','.xls');
	
	############ do not edit below unless you know what you're doing ###########
	@ini_set('zlib.output_compression', 'Off');
	
	function redirect403 () {
		header("HTTP/1.0 403 Forbidden");
		exit;
	}
	
	
	//check frontenduser module authentification
	if (USE_FRONTENDUSERS_MODULE == true) {
		require_once(dirname(__FILE__)."/include.php");
		global $gCms;
		$feusers = $gCms->modules['FrontEndUsers']['object'];
		if ($feusers) {
			$uid = $feusers->LoggedInId();
			$username = $feusers->LoggedInName();
			if (empty($uid) or $uid==0 or empty($username)) {
				header("HTTP/1.0 403 Forbidden");
				exit;
			}
		}
	}

	$decoded_link = base64_decode($_GET['id']);
	$data_parts = explode("&", $decoded_link); 
	$pos = strrpos($decoded_link,"/")+1;
	
	$width = 0;
	$height = 0;
	$percent = 25;
	foreach($data_parts as $var) {
		if(strrpos($var, 'height') !== false)
			$height = intval(str_replace("height=", "", $var));
		elseif(strrpos($var,'width') !== false)
			$width = intval(str_replace("width=", "", $var));
		elseif(strrpos($var,'percentage') !== false)
			$percent = intval(str_replace("percent=", "", $var));
	}
	
	if ($pos!=0) {
		//clean up the path and get rid of anything odd
		$decoded_link = str_replace("..","",$data_parts[0]);
		$filepath = stripslashes(strip_tags($decoded_link, $pos));
		$filename = stripslashes(strip_tags(substr($decoded_link, $pos)));
		$extension = strrchr(strtolower($filename), ".");
	} else {
		redirect403();
	}
	
	if (in_array($extension, $allowed_filetypes)==false) {
		redirect403();
	}
	
   $image = new SimpleImage();
   $image->load($filepath);   
   
	if($width>0 || $height>0) {
		//$tn_image = new Thumbnail($filepath, $width, $height, $percentage);
		if ($width>0 && $height==0)
			$image->resizeToWidth($width);
		elseif($height>0 && $width==0)
			$image->resizeToHeight($height);
		else
			$image->resize($width,$height);
	}else{
		//$tn_image = new Thumbnail($filepath, $width, $height, $percentage);
		$image->scale($percentage);
	}
	
	//echo $width;	
	
	$image->output();
	
    //exit;
?>