Location: PHPKode > projects > Community Learning Network > cln/modules/ImageAV/lib/getThumbnail.php
<?php
/*
 * Get thumbnail - really creates a thumbnail or retrieves existing one
 *
 * Copyright (c) 2003-4 St. Christopher House
 *
 * Developed by The Working Group Inc.
 *
 * 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.  
 *
 * @version $Id: getThumbnail.php,v 1.8 2005/01/24 20:32:21 cbooth7575 Exp $
 *
 *
 *	Notes:
 *
 * 		takes an image name and looks for it's thumbnail
 *		if it finds one, it returns that, as an image
 *		if it does not find one, it creates one and returns that
 *
 */

define('CLN_FILE_BASE', '../../../');
$PAGETYPE = 'Admin';
include(CLN_FILE_BASE . 'index.php');

if (!defined('CLN_IMAGES_ROOT_DIR')) {
	loadClass(CLN_IMAGE_MODID);
}


//**********************************************************************************

/*
 *
 * Function:  noThumbailAvailable()
 *
 *		returns no thumbnail available image
 *
 * @access public
 * @return TBD
 *                
 */
function noThumbailAvailable() {
	header("Content-type: image/png");
	
	$im = @imagecreate(100, 50)
	   or die("Cannot Initialize new GD image stream");
	$background_color = imagecolorallocate($im, 255, 255, 255);
	$text_color = imagecolorallocate($im, 0, 0, 0);
	imagestring($im, 10, 5, 5,  "no", $text_color);
	imagestring($im, 10, 5, 20,  "thumbnail", $text_color);
	imagestring($im, 10, 5, 35,  "available", $text_color);
	imagepng($im);
	imagedestroy($im);
	exit;
}

//**********************************************************************************

include("Image/Transform.php");
//define('IMAGE_TRANSFORM_LIB_PATH', '/usr/bin/'); 
    
//**********************************************************************************
// Main code

if(isset($_GET['filename'])) {

 	$sourcePath = CLN_FILE_BASE.CLN_IMAGES_ROOT_DIR;
	  //print $sourcePath."<br/>";
  $destinationPath = CLN_FILE_BASE.CLN_IMAGES_ROOT_DIR.".thumbnail/";
	  //print $destinationPath."<br/>";
		
	if(ereg("/([^\/]*$)",$_GET['filename'],$match)) {
		$filename = $match[1];
		 //print $filename."<br/>";
	}
	
	// get type
	if(ereg(".*\.([a-zA-Z0-9]*)",$_GET['filename'],$match)) {
		$extension = $match[1];
	} else {
		noThumbailAvailable();
	}
	
	if(eregi("[jpeg|jpg]",$extension)) {
		$type = "jpg";
	}
	else if(eregi("gif",$extension)) {
		$type = "gif";
	}
	else if(eregi("png",$extension)) {
		$type = "png";
	}
	else {
		noThumbailAvailable(); // exits inside this function
	}
	
	// output image
	header("Content-type: image/"+$type);
	
	if(!file_exists($destinationPath.$filename)) {
		$imageObj = Image_Transform::factory(CLN_IMAGE_MANIPULATION_LIBRARY);
		
		$imageObj->load($sourcePath.$filename);
		
		if(!($imageObj->getImageHeight() < CLN_IMAGE_THUMBNAIL_SIZE && $imageObj->getImageWidth() < CLN_IMAGE_THUMBNAIL_SIZE)) {
			$imageObj->scaleMaxLength(CLN_IMAGE_THUMBNAIL_SIZE);
		}
		
		if(!is_dir($destinationPath)) {
			$old = umask(0);
			mkdir($destinationPath,0777);
			copy($sourcePath."index.php",$destinationPath."index.php");
			umask($old);
		}
		
		$imageObj->save($destinationPath.$filename);
	}
	
	// :QUESTION: why did i do this? - isn't it easier to just open the file and print it out? - dwc
	$imageObj = Image_Transform::factory(CLN_IMAGE_MANIPULATION_LIBRARY);
	$imageObj->load($destinationPath.$filename);
	$imageObj->display();
	
	clnWriteLog();

	
} else {

	noThumbailAvailable();
	
}



?>
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