1<?php 2/** 3 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) 4 * @author Andreas Gohr <gohr@cosmocode.de> 5 */ 6 7if(!defined('DOKU_INC')) define('DOKU_INC', realpath(dirname(__FILE__).'/../../../').'/'); 8define('DOKU_DISABLE_GZIP_OUTPUT', 1); 9require_once(DOKU_INC.'inc/init.php'); 10session_write_close(); 11 12global $conf; 13 14 15/** @var syntax_plugin_panoview $pl */ 16$pl = plugin_load('syntax', 'panoview'); 17 18$data = array(); 19// get parameters 20list($data['zoom'], $data['col'], $data['row']) = explode('-', $_GET['tile']); 21$data['id'] = cleanID($_GET['image']); 22$data['file'] = mediaFN($data['id']); 23$data['mtime'] = @filemtime($data['file']); 24 25// check auth and existance 26if(auth_quickaclcheck(getNS($data['id']).':X') < AUTH_READ) $pl->gfx_error('noauth'); 27if(!$data['mtime']) $pl->gfx_error('notfound'); 28 29// calculate zoom level scaling 30$data['ts'] = 256; 31list($data['width'], $data['height']) = getimagesize($data['file']); 32$data['scale'] = (int) pow(2, $data['zoom']); 33$data['max'] = max($data['width'], $data['height']); 34$data['inv'] = $data['max'] / ($data['ts'] * $data['scale']); 35 36if($data['inv'] < 0.5) $pl->gfx_error('maxzoom'); 37if($data['inv'] < 1.0) $data['inv'] = 1.0; // original size, no upscaling 38 39// calculate tile boundaries 40$data['tlx'] = (int) ($data['col'] * $data['ts'] * $data['inv']); 41$data['tly'] = (int) ($data['row'] * $data['ts'] * $data['inv']); 42$data['brx'] = (int) ($data['tlx'] + ($data['ts'] * $data['inv'])); 43$data['bry'] = (int) ($data['tly'] + ($data['ts'] * $data['inv'])); 44if($data['tlx'] > $data['width'] || $data['tly'] > $data['height']) $pl->gfx_error('blank'); 45 46// cache times 47$data['cache'] = getCacheName($data['file'], '.pv.'.$data['zoom'].'-'.$data['col'].'-'.$data['row'].'.jpg'); 48$data['cachet'] = @filemtime($data['cache']); 49 50// (re)generate 51if($data['cachet'] < $data['mtime']) { 52 $pl->tile_lock($data); 53 if($conf['im_convert']) { 54 $pl->tile_im($data); 55 } else { 56 $pl->tile_gd($data); 57 } 58 $pl->tile_unlock($data); 59} 60 61// send 62header('Content-type: image/jpeg'); 63http_conditionalRequest(max($data['mtime'], $data['cachet'])); 64 65//use x-sendfile header to pass the delivery to compatible webservers 66http_sendfile($data['cache']); 67 68// send file contents 69$fp = @fopen($data['cache'], "rb"); 70if($fp) { 71 http_rangeRequest($fp, filesize($data['cache']), 'image/jpeg'); 72} else { 73 header("HTTP/1.0 500 Internal Server Error"); 74 print "Could not read tile - bad permissions?"; 75} 76