cgis/staticmap.php

   1 #!/usr/bin/php5-cgi
   2 <?php
   3
   4 /**
   5  * staticMapLite 0.03
   6  * modded for RRZE settings -unrz191 2012-06-10
   7  *
   8  * Copyright 2009 Gerhard Koch
   9  *
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  *
  22  * @author Gerhard Koch <gerhard.koch AT ymail.com>
  23  *
  24  * USAGE:
  25  *
  26  *  staticmap.php?center=40.714728,-73.998672&zoom=14&size=512x512&maptype=mapnik&markers=40.702147,-74.015794,blues|40.711614,-74.012318,greeng|40.718217,-73.998284,redc
  27  *
  28  */
  29
  30 error_reporting(0);
  31 ini_set('display_errors','off');
  32
  33 Class staticMapLite {
  34
  35         protected $maxWidth = 2048;
  36         protected $maxHeight = 2048;
  37
  38         protected $tileSize = 256;
  39         protected $tileSrcUrl = array(  'osmorg' => 'http://osm.rrze.fau.de/tiles/{Z}/{X}/{Y}.png',
  40                                         'osmde' => 'http://osm.rrze.fau.de/osmde/{Z}/{X}/{Y}.png'
  41                                      );
  42
  43         protected $tileDefaultSrc = 'osmde';
  44         protected $markerBaseDir = '/var/www/staticmaplite/images/markers';
  45         protected $osmLogo = '/var/www/staticmaplite/images/osm_logo.png';
  46
  47         protected $markerPrototypes = array(// found at http://www.mapito.net/map-marker-icons.html
  48                                                                                 'lighblue' => array('regex'=>'/^lightblue([0-9]+)$/',
  49                                                                                                                         'extension'=>'.png',
  50                                                                                                                         'shadow'=>false,
  51                                                                                                                         'offsetImage'=>'0,-19',
  52                                                                                                                         'offsetShadow'=>false
  53                                                                                                                 ),
  54                                                                                 // openlayers std markers
  55                                                                                 'ol-marker'=> array('regex'=>'/^ol-marker(|-blue|-gold|-green)+$/',
  56                                                                                                                         'extension'=>'.png',
  57                                                                                                                         'shadow'=>'../marker_shadow.png',
  58                                                                                                                         'offsetImage'=>'-10,-25',
  59                                                                                                                         'offsetShadow'=>'-1,-13'
  60                                                                                                                 ),
  61                                                                                 // taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
  62                                                                                 'ylw'=> array('regex'=>'/^(pink|purple|red|ltblu|ylw)-pushpin$/',
  63                                                                                                                         'extension'=>'.png',
  64                                                                                                                         'shadow'=>'../marker_shadow.png',
  65                                                                                                                         'offsetImage'=>'-10,-32',
  66                                                                                                                         'offsetShadow'=>'-1,-13'
  67                                                                                                                 )
  68
  69                                                                         );
  70
  71
  72
  73         # No point in caching - our source is localhost
  74         protected $useTileCache = false;
  75         protected $tileCacheBaseDir = 'cache/tiles';
  76
  77         protected $useMapCache = false;
  78         protected $mapCacheBaseDir = 'cache/maps';
  79         protected $mapCacheID = '';
  80         protected $mapCacheFile = '';
  81         protected $mapCacheExtension = 'png';
  82
  83         protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
  84         protected $centerX, $centerY, $offsetX, $offsetY;
  85
  86         public function __construct(){
  87                 $this->zoom = 0;
  88                 $this->lat = 0;
  89                 $this->lon = 0;
  90                 $this->width = 500;
  91                 $this->height = 350;
  92                 $this->markers = array();
  93                 $this->maptype = $this->tileDefaultSrc;
  94         }
  95
  96         public function parseParams(){
  97                 global $_GET;
  98
  99                 // get zoom from GET paramter
 100                 $this->zoom = $_GET['zoom']?intval($_GET['zoom']):0;
 101                 if($this->zoom>18)$this->zoom = 18;
 102
 103                 // get lat and lon from GET paramter
 104                 list($this->lat,$this->lon) = split(',',$_GET['center']);
 105                 $this->lat = floatval($this->lat);
 106                 $this->lon = floatval($this->lon);
 107
 108                 // get zoom from GET paramter
 109                 if($_GET['size']){
 110                         list($this->width, $this->height) = split('x',$_GET['size']);
 111                         $this->width = intval($this->width);
 112                         if($this->width > $this->maxWidth) $this->width = $this->maxWidth;
 113                         $this->height = intval($this->height);
 114                         if($this->height > $this->maxHeight) $this->height = $this->maxHeight;
 115                 }
 116                 if($_GET['markers']){
 117                         $markers = split('%7C|\|',$_GET['markers']);
 118                         foreach($markers as $marker){
 119                                         list($markerLat, $markerLon, $markerType) = split(',',$marker);
 120                                         $markerLat = floatval($markerLat);
 121                                         $markerLon = floatval($markerLon);
 122                                         $markerType = basename($markerType);
 123                                         $this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType);
 124                         }
 125
 126                 }
 127                 if($_GET['maptype']){
 128                         if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
 129                 }
 130         }
 131
 132         public function lonToTile($long, $zoom){
 133                 return (($long + 180) / 360) * pow(2, $zoom);
 134         }
 135
 136         public function latToTile($lat, $zoom){
 137                 return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom);
 138         }
 139
 140         public function initCoords(){
 141                 $this->centerX = $this->lonToTile($this->lon, $this->zoom);
 142                 $this->centerY = $this->latToTile($this->lat, $this->zoom);
 143                 $this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize);
 144                 $this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize);
 145         }
 146
 147         public function createBaseMap(){
 148                 $this->image = imagecreatetruecolor($this->width, $this->height);
 149                 $startX = floor($this->centerX-($this->width/$this->tileSize)/2);
 150                 $startY = floor($this->centerY-($this->height/$this->tileSize)/2);
 151                 $endX = ceil($this->centerX+($this->width/$this->tileSize)/2);
 152                 $endY = ceil($this->centerY+($this->height/$this->tileSize)/2);
 153                 $this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize);
 154                 $this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize);
 155                 $this->offsetX += floor($this->width/2);
 156                 $this->offsetY += floor($this->height/2);
 157                 $this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize;
 158                 $this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize;
 159
 160                 for($x=$startX; $x<=$endX; $x++){
 161                         for($y=$startY; $y<=$endY; $y++){
 162                                 $url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
 163                                 $tileData = $this->fetchTile($url);
 164                                 if($tileData){
 165                                         $tileImage = imagecreatefromstring($tileData);
 166                                 } else {
 167                                         $tileImage = imagecreate($this->tileSize,$this->tileSize);
 168                                         $color = imagecolorallocate($tileImage, 255, 255, 255);
 169                                         @imagestring($tileImage,1,127,127,'err',$color);
 170                                 }
 171                                 $destX = ($x-$startX)*$this->tileSize+$this->offsetX;
 172                                 $destY = ($y-$startY)*$this->tileSize+$this->offsetY;
 173                                 imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
 174                         }
 175                 }
 176         }
 177
 178
 179         public function placeMarkers(){
 180                 // loop thru marker array
 181                 foreach($this->markers as $marker){
 182                         // set some local variables
 183                         $markerLat = $marker['lat'];
 184                         $markerLon = $marker['lon'];
 185                         $markerType = $marker['type'];
 186                         // clear variables from previous loops
 187                         $markerFilename = '';
 188                         $markerShadow = '';
 189                         $matches = false;
 190                         // check for marker type, get settings from markerPrototypes
 191                         if($markerType){
 192                                 foreach($this->markerPrototypes as $markerPrototype){
 193                                         if(preg_match($markerPrototype['regex'],$markerType,$matches)){
 194                                                 $markerFilename = $matches[0].$markerPrototype['extension'];
 195                                                 if($markerPrototype['offsetImage']){
 196                                                         list($markerImageOffsetX, $markerImageOffsetY)  = split(",",$markerPrototype['offsetImage']);
 197                                                 }
 198                                                 $markerShadow = $markerPrototype['shadow'];
 199                                                 if($markerShadow){
 200                                                         list($markerShadowOffsetX, $markerShadowOffsetY)  = split(",",$markerPrototype['offsetShadow']);
 201                                                 }
 202                                         }
 203                                 }
 204                         }
 205
 206                         // check required files or set default
 207                         if($markerFilename == '' || !file_exists($this->markerBaseDir.'/'.$markerFilename)){
 208                                 $markerIndex++;
 209                                 $markerFilename = 'lightblue'.$markerIndex.'.png';
 210                                 $markerImageOffsetX = 0;
 211                                 $markerImageOffsetY = -19;                                      }
 212
 213                         // create img resource
 214                         if(file_exists($this->markerBaseDir.'/'.$markerFilename)){
 215                                 $markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename);
 216                         } else {
 217                                 $markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png');
 218                         }
 219
 220                         // check for shadow + create shadow recource
 221                         if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){
 222                                 $markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow);
 223                         }
 224
 225                         // calc position
 226                         $destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom)));
 227                         $destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom)));
 228
 229                         // copy shadow on basemap
 230                         if($markerShadow && $markerShadowImg){
 231                                 imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY),
 232                                                         0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
 233                         }
 234
 235                         // copy marker on basemap above shadow
 236                         imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY),
 237                                                         0, 0, imagesx($markerImg), imagesy($markerImg));
 238
 239         };
 240 }
 241
 242
 243
 244         public function tileUrlToFilename($url){
 245                 return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url);
 246         }
 247
 248         public function checkTileCache($url){
 249                 $filename = $this->tileUrlToFilename($url);
 250                 if(file_exists($filename)){
 251                         return file_get_contents($filename);
 252                 }
 253         }
 254
 255         public function checkMapCache(){
 256                 $this->mapCacheID = md5($this->serializeParams());
 257                 $filename = $this->mapCacheIDToFilename();
 258                 if(file_exists($filename)) return true;
 259         }
 260
 261         public function serializeParams(){
 262                 return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype));
 263         }
 264
 265         public function mapCacheIDToFilename(){
 266                 if(!$this->mapCacheFile){
 267                         $this->mapCacheFile = $this->mapCacheBaseDir."/".$this->maptype."/".$this->zoom."/cache_".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4);
 268                 }
 269                 return $this->mapCacheFile.".".$this->mapCacheExtension;
 270         }
 271
 272
 273
 274         public function mkdir_recursive($pathname, $mode){
 275                 is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode);
 276                 return is_dir($pathname) || @mkdir($pathname, $mode);
 277         }
 278         public function writeTileToCache($url, $data){
 279                 $filename = $this->tileUrlToFilename($url);
 280                 $this->mkdir_recursive(dirname($filename),0777);
 281                 file_put_contents($filename, $data);
 282         }
 283
 284         public function fetchTile($url){
 285                 if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
 286                 $ch = curl_init();
 287                 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 288                 curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
 289                 curl_setopt($ch, CURLOPT_URL, $url);
 290                 $tile = curl_exec($ch);
 291                 curl_close($ch);
 292                 if($tile && $this->useTileCache){
 293                         $this->writeTileToCache($url,$tile);
 294                 }
 295                 return $tile;
 296
 297         }
 298
 299         public function copyrightNotice(){
 300                         $logoImg = imagecreatefrompng($this->osmLogo);
 301                         imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));
 302
 303         }
 304
 305         public function sendHeader(){
 306                 header('Content-Type: image/png');
 307                 $expires = 60*60*24*14;
 308                 header("Pragma: public");
 309                 header("Cache-Control: maxage=".$expires);
 310                 header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
 311         }
 312
 313         public function makeMap(){
 314                 $this->initCoords();
 315                 $this->createBaseMap();
 316                 if(count($this->markers))$this->placeMarkers();
 317                 if($this->osmLogo) $this->copyrightNotice();
 318         }
 319
 320         public function showMap(){
 321                 $this->parseParams();
 322                 if($this->useMapCache){
 323                         // use map cache, so check cache for map
 324                         if(!$this->checkMapCache()){
 325                                 // map is not in cache, needs to be build
 326                                 $this->makeMap();
 327                                 $this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777);
 328                                 imagepng($this->image,$this->mapCacheIDToFilename(),9);
 329                                 $this->sendHeader();
 330                                 if(file_exists($this->mapCacheIDToFilename())){
 331                                         return file_get_contents($this->mapCacheIDToFilename());
 332                                 } else {
 333                                         return imagepng($this->image);
 334                                 }
 335                         } else {
 336                                 // map is in cache
 337                                 $this->sendHeader();
 338                                 return file_get_contents($this->mapCacheIDToFilename());
 339                         }
 340
 341                 } else {
 342                         // no cache, make map, send headers and deliver png
 343                         $this->makeMap();
 344                         $this->sendHeader();
 345                         return imagepng($this->image);
 346
 347                 }
 348         }
 349
 350 }
 351
 352 $map = new staticMapLite();
 353 print $map->showMap();
 354
 355 ?>