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');
10require_once(DOKU_INC.'inc/common.php');
11require_once(DOKU_INC.'inc/pageutils.php');
12require_once(DOKU_INC.'inc/httputils.php');
13require_once(DOKU_INC.'inc/pluginutils.php');
14require_once(DOKU_INC.'inc/auth.php');
15session_write_close();
16
17/** @var syntax_plugin_panoview $pl */
18$pl =& plugin_load('syntax', 'panoview');
19
20$data = array();
21// get parameters
22list($data['zoom'], $data['col'], $data['row']) = explode('-', $_GET['tile']);
23$data['id']    = cleanID($_GET['image']);
24$data['file']  = mediaFN($data['id']);
25$data['mtime'] = @filemtime($data['file']);
26
27// check auth and existance
28if(auth_quickaclcheck(getNS($data['id']).':X') < AUTH_READ) $pl->gfx_error('noauth');
29if(!$data['mtime']) $pl->gfx_error('notfound');
30
31// calculate zoom level scaling
32$data['ts'] = 256;
33list($data['width'], $data['height']) = getimagesize($data['file']);
34$data['scale'] = (int) pow(2, $data['zoom']);
35$data['max']   = max($data['width'], $data['height']);
36$data['inv']   = $data['max'] / ($data['ts'] * $data['scale']);
37
38if($data['inv'] < 0.5) $pl->gfx_error('maxzoom');
39if($data['inv'] < 1.0) $data['inv'] = 1.0; // original size, no upscaling
40
41// calculate tile boundaries
42$data['tlx'] = (int) ($data['col'] * $data['ts'] * $data['inv']);
43$data['tly'] = (int) ($data['row'] * $data['ts'] * $data['inv']);
44$data['brx'] = (int) ($data['tlx'] + ($data['ts'] * $data['inv']));
45$data['bry'] = (int) ($data['tly'] + ($data['ts'] * $data['inv']));
46if($data['tlx'] > $data['width'] || $data['tly'] > $data['height']) $pl->gfx_error('blank');
47
48// cache times
49$data['cache']  = getCacheName($data['file'], '.pv.'.$data['zoom'].'-'.$data['col'].'-'.$data['row'].'.jpg');
50$data['cachet'] = @filemtime($data['cache']);
51
52// (re)generate
53if($data['cachet'] < $data['mtime']) {
54    $pl->tile_lock($data);
55    if($conf['im_convert']) {
56        $pl->tile_im($data);
57    } else {
58        $pl->tile_gd($data);
59    }
60    $pl->tile_unlock($data);
61}
62
63// send
64header('Content-type: image/jpeg');
65http_conditionalRequest(max($data['mtime'], $data['selft']));
66
67//use x-sendfile header to pass the delivery to compatible webservers
68if(http_sendfile($data['cache'])) exit;
69
70// send file contents
71$fp = @fopen($data['cache'], "rb");
72if($fp) {
73    http_rangeRequest($fp, filesize($data['cache']), 'image/jpeg');
74} else {
75    header("HTTP/1.0 500 Internal Server Error");
76    print "Could not read tile - bad permissions?";
77}
78
79
80//Setup VIM: ex: et ts=4 enc=utf-8 :
81