thumbs.php

eGroupWare is a multi-user, web-based groupware suite developed on a custom set of PHP-based APIs. C

<?php 
/***********************************************************************
** Title.........:	Thumbnail generator, with cache.
** Version.......:	1.0
** Author........:	Xiang Wei ZHUO <[e-mail]>
** Filename......:	thumbs.php
** Last changed..:	1 Mar 2003 
** Notes.........:	Configuration in config.inc.php

                    - if the thumbnail does not exists or the source
					  file is newer, create a new thumbnail.

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


include 'config.inc.php';
require_once '../ImageEditor/Transform.php';

$img = $BASE_DIR.urldecode($_GET['img']);

if(is_file($img)) {
	make_thumbs(urldecode($_GET['img']));
}


function make_thumbs($img) 
{
	global $BASE_DIR, $BASE_URL;


	$path_info = pathinfo($img);
	$path = $path_info['dirname']."/";
	$img_file = $path_info['basename'];

	$thumb = $path.'.'.$img_file;

	$img_info = getimagesize($BASE_DIR.$path.$img_file);
	$w = $img_info[0]; $h = $img_info[1];
	
	$nw = 96; $nh = 96;

	if($w <= $nw && $h <= $nh) {
		header('Location: '.$BASE_URL.$path.$img_file);
		exit();		
	}

	if(is_file($BASE_DIR.$thumb)) {

		$t_mtime = filemtime($BASE_DIR.$thumb);
		$o_mtime = filemtime($BASE_DIR.$img);

		if($t_mtime > $o_mtime) {
			//echo $BASE_URL.$path.'.'.$img_file;
			header('Location: '.$BASE_URL.$path.'.'.$img_file);
			exit();		
		}
	}

	$img_thumbs = Image_Transform::factory(IMAGE_CLASS);
	$img_thumbs->load($BASE_DIR.$path.$img_file);


	if ($w > $h) 
         $nh = unpercent(percent($nw, $w), $h);          
    else if ($h > $w) 
         $nw = unpercent(percent($nh, $h), $w); 

	$img_thumbs->resize($nw, $nh);

	$img_thumbs->save($BASE_DIR.$thumb);
	$img_thumbs->free();

	chmod($BASE_DIR.$thumb, 0666);

	if(is_file($BASE_DIR.$thumb)) {
		//echo "Made:".$BASE_URL.$path.'.'.$img_file;
		header('Location: '.$BASE_URL.$path.'.'.$img_file);
		exit();
	}
}
function percent($p, $w) 
    { 
    return (real)(100 * ($p / $w)); 
    } 

function unpercent($percent, $whole) 
    { 
    return (real)(($percent * $whole) / 100); 
    } 

?>