133 lines
3.1 KiB
PHP
133 lines
3.1 KiB
PHP
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<?php
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/**
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* @package AutoIndex
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*
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* @copyright Copyright (C) 2002-2004 Justin Hagstrom
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* @license http://www.gnu.org/licenses/gpl.html GNU General Public License (GPL)
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*
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* @link http://autoindex.sourceforge.net
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*/
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/*
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AutoIndex PHP Script is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AutoIndex PHP Script is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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if (!defined('IN_AUTOINDEX') || !IN_AUTOINDEX)
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{
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die();
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}
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/**
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* Generates a thumbnail of an image file.
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*
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* @author Justin Hagstrom <JustinHagstrom@yahoo.com>
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* @version 1.0.0 (May 22, 2004)
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* @package AutoIndex
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*/
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class Image
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{
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/**
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* @var string Name of the image file
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*/
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private $filename;
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/**
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* @var int The height of the thumbnail to create (width is automatically determined)
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*/
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private $height;
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/**
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* Outputs the jpeg image along with the correct headers so the
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* browser will display it. The script is then exited.
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*/
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public function __toString()
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{
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$thumbnail_height = $this -> height;
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$file = $this -> filename;
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if (!@is_file($file))
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{
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header('HTTP/1.0 404 Not Found');
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throw new ExceptionDisplay('Image file not found: <em>'
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. Url::html_output($file) . '</em>');
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}
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switch (FileItem::ext($file))
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{
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case 'gif':
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{
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$src = @imagecreatefromgif($file);
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break;
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}
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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{
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$src = @imagecreatefromjpeg($file);
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break;
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}
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case 'png':
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{
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$src = @imagecreatefrompng($file);
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break;
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}
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default:
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{
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throw new ExceptionDisplay('Unsupported file extension.');
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}
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}
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if ($src === false)
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{
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throw new ExceptionDisplay('Unsupported image type.');
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}
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header('Content-Type: image/jpeg');
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header('Cache-Control: public, max-age=3600, must-revalidate');
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header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 3600)
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. ' GMT');
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$src_height = imagesy($src);
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if ($src_height <= $thumbnail_height)
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{
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imagejpeg($src, '', 95);
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}
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else
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{
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$src_width = imagesx($src);
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$thumb_width = $thumbnail_height * ($src_width / $src_height);
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$thumb = imagecreatetruecolor($thumb_width, $thumbnail_height);
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imagecopyresampled($thumb, $src, 0, 0, 0, 0, $thumb_width,
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$thumbnail_height, $src_width, $src_height);
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imagejpeg($thumb);
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imagedestroy($thumb);
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}
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imagedestroy($src);
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die();
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}
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/**
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* @param string $file The image file
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*/
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public function __construct($file)
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{
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if (!THUMBNAIL_HEIGHT)
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{
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throw new ExceptionDisplay('Image thumbnailing is turned off.');
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}
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global $config;
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$this -> height = (int)$config -> __get('thumbnail_height');
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$this -> filename = $file;
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}
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}
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?>
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