xref: /plugin/panoview/tiles.php (revision c131b3241417b64e1a7e9f19c11225689dc65ec6) 
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/auth.php');
14session_write_close();
15
16    $data = array();
17    // get parameters
18    list($data['zoom'],$data['col'],$data['row']) = explode('-',$_GET['tile']);
19    $data['id']    = cleanID($_GET['image']);
20    $data['file']  = mediaFN($data['id']);
21    $data['mtime'] = @filemtime($data['file']);
22
23    // check auth and existance
24    if(auth_quickaclcheck(getNS($data['id']).':X') < AUTH_READ) gfx_error('noauth');
25    if(!$data['mtime']) gfx_error('notfound');
26
27    // calculate zoom level scaling
28    $data['ts']    = 256;
29    list($data['width'],$data['height']) = getimagesize($data['file']);
30    $data['scale'] = (int)pow(2,$data['zoom']);
31    $data['max']   = max($data['width'],$data['height']);
32    $data['inv']   = $data['max']  / ($data['ts'] * $data['scale']);
33    if($data['inv'] < 1.0) gfx_error('maxzoom');
34
35    // calculate tile boundaries
36    $data['tlx']   = (int) ($data['col'] * $data['ts'] * $data['inv']);
37    $data['tly']   = (int) ($data['row'] * $data['ts'] * $data['inv']);
38    $data['brx']   = (int) ($data['tlx'] + ($data['ts'] * $data['inv']));
39    $data['bry']   = (int) ($data['tly'] + ($data['ts'] * $data['inv']));
40    if($data['tlx'] > $data['width'] || $data['tly'] > $data['height']) gfx_error('blank');
41
42    // cache times
43    $data['cache']  = getCacheName($data['file'],'.pv.'.$data['zoom'].'-'.$data['col'].'-'.$data['row'].'.jpg');
44    $data['cachet'] = @filemtime($data['cache']);
45
46    // (re)generate
47    if($data['cachet'] < $data['mtime']){
48        if($conf['im_convert']){
49            tile_im($data);
50        }else{
51            tile_gd($data);
52        }
53    }
54
55    // send
56    header('Content-type: image/jpeg');
57    http_conditionalRequest(max($data['mtime'],$data['selft']));
58    http_sendfile($data['cache']);
59    readfile($data['cache']);
60
61
62
63
64/* --------------- functions -------------------- */
65
66
67function tile_gd($d){
68    global $conf;
69
70    $img = null;
71    if(preg_match('/\.jpe?g$/',$d['file'])){
72        $img   = @imagecreatefromjpeg($d['file']);
73    }elseif(preg_match('/\.png$/',$d['file'])){
74        $img   = @imagecreatefrompng($d['file']);
75    }elseif(preg_match('/\.gif$/',$d['file'])){
76        $img   = @imagecreatefromgif($d['file']);
77    }
78    if(!$img) gfx_error('generic');
79
80    $crop  = image_crop($img,$d['width'],$d['height'],$d['tlx'],$d['tly'],$d['brx'],$d['bry']);
81    imagedestroy($img);
82
83    $scale = image_scale($crop,abs($d['brx'] - $d['tlx']),abs($d['bry'] - $d['tly']),$d['ts'],$d['ts']);
84    imagedestroy($crop);
85
86    imagejpeg($scale,$d['cache'],$conf['jpg_quality']);
87    imagedestroy($scale);
88
89    if($conf['fperm']) chmod($d['cache'], $conf['fperm']);
90}
91
92function tile_im($d){
93    global $conf;
94
95    $cmd  = $conf['im_convert'];
96    $cmd .= ' '.escapeshellarg($d['file']);
97    $cmd .= ' -crop \''.abs($d['brx'] - $d['tlx']).'x'.abs($d['bry'] - $d['tly']).'!+'.$d['tlx'].'+'.$d['tly'].'\'';
98    $cmd .= ' -background black';
99    $cmd .= ' -extent \''.abs($d['brx'] - $d['tlx']).'x'.abs($d['bry'] - $d['tly']).'!\'';
100    $cmd .= ' -resize \''.$d['ts'].'x'.$d['ts'].'!\'';
101
102    $cmd .= ' -quality '.$conf['jpg_quality'];
103    $cmd .= ' '.escapeshellarg($d['cache']);
104
105#    dbg($cmd); exit;
106
107    @exec($cmd,$out,$retval);
108    if ($retval == 0) return true;
109    gfx_error('generic');
110}
111
112
113
114function image_scale($image,$x,$y,$w,$h){
115    $scale=imagecreatetruecolor($w,$h);
116    imagecopyresampled($scale,$image,0,0,0,0,$w,$h,$x,$y);
117    return $scale;
118}
119
120function image_crop($image,$x,$y,$left,$upper,$right,$lower) {
121    $w=abs($right-$left);
122    $h=abs($lower-$upper);
123    $crop = imagecreatetruecolor($w,$h);
124    imagecopy($crop,$image,0,0,$left,$upper,$w,$h);
125    return $crop;
126}
127
128function gfx_error($type){
129    $file = dirname(__FILE__).'/gfx/'.$type.'.gif';
130    $time = filemtime($file);
131    header('Content-type: image/gif');
132
133    http_conditionalRequest($time);
134    http_sendfile($file);
135    readfile($file);
136    exit;
137}
138
139//Setup VIM: ex: et ts=4 enc=utf-8 :
140