[osmrrze.git] / cgis / staticmap.php

#!/usr/bin/php5-cgi
<?php

/**
 * staticMapLite 0.03
 * modded for RRZE settings -unrz191 2012-06-10
 *
 * Copyright 2009 Gerhard Koch
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @author Gerhard Koch <gerhard.koch AT ymail.com>
 *
 * USAGE: 
 *
 *  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
 *
 */ 

error_reporting(0);
ini_set('display_errors','off');

Class staticMapLite {

	protected $maxWidth = 2048;
	protected $maxHeight = 2048;

	protected $tileSize = 256;
	protected $tileSrcUrl = array(	'osmorg' => 'http://osm.rrze.fau.de/tiles/{Z}/{X}/{Y}.png',
                                        'osmde' => 'http://osm.rrze.fau.de/osmde/{Z}/{X}/{Y}.png',
                                        'osmorglowzoom' => 'http://osm.rrze.fau.de/lowzoom/{Z}/{X}/{Y}.png',
                                        'luftbilderl' => 'http://osm.rrze.fau.de/luftbilderl/{Z}/{X}/{Y}.png'
	                             );
	
	protected $tileDefaultSrc = 'osmde';
	protected $markerBaseDir = '/var/www/staticmaplite/images/markers';
	protected $osmLogo = '/var/www/staticmaplite/images/osm_logo.png';
	
	protected $markerPrototypes = array(// found at http://www.mapito.net/map-marker-icons.html
										'lighblue' => array('regex'=>'/^lightblue([0-9]+)$/', 
															'extension'=>'.png',
															'shadow'=>false, 
															'offsetImage'=>'0,-19',
															'offsetShadow'=>false
														),
										// openlayers std markers
										'ol-marker'=> array('regex'=>'/^ol-marker(|-blue|-gold|-green)+$/',
															'extension'=>'.png',
															'shadow'=>'../marker_shadow.png', 
															'offsetImage'=>'-10,-25', 
															'offsetShadow'=>'-1,-13'
														),
										// taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
										'ylw'=> array('regex'=>'/^(pink|purple|red|ltblu|ylw)-pushpin$/',
															'extension'=>'.png',
															'shadow'=>'../marker_shadow.png', 
															'offsetImage'=>'-10,-32', 
															'offsetShadow'=>'-1,-13'
														)
														
									);

	
	# No point in caching - our source is localhost
	protected $useTileCache = false;
	protected $tileCacheBaseDir = 'cache/tiles';

	protected $useMapCache = false;
	protected $mapCacheBaseDir = 'cache/maps';
	protected $mapCacheID = '';
	protected $mapCacheFile = '';
	protected $mapCacheExtension = 'png';
	
	protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
	protected $centerX, $centerY, $offsetX, $offsetY;

	public function __construct(){
		$this->zoom = 0;
		$this->lat = 0;
		$this->lon = 0;
		$this->width = 500;
		$this->height = 350;
		$this->markers = array();
		$this->maptype = $this->tileDefaultSrc;
	}
	
	public function parseParams(){
		global $_GET;
		
		// get zoom from GET paramter
		$this->zoom = $_GET['zoom']?intval($_GET['zoom']):0;
		if($this->zoom>18)$this->zoom = 18;
		
		// get lat and lon from GET paramter
		list($this->lat,$this->lon) = split(',',$_GET['center']);
		$this->lat = floatval($this->lat);
		$this->lon = floatval($this->lon);
		
		// get zoom from GET paramter
		if($_GET['size']){
			list($this->width, $this->height) = split('x',$_GET['size']);
			$this->width = intval($this->width);
			if($this->width > $this->maxWidth) $this->width = $this->maxWidth;
			$this->height = intval($this->height);
			if($this->height > $this->maxHeight) $this->height = $this->maxHeight;
		}
		if($_GET['markers']){
			$markers = split('%7C|\|',$_GET['markers']);
			foreach($markers as $marker){
					list($markerLat, $markerLon, $markerType) = split(',',$marker);
					$markerLat = floatval($markerLat);
					$markerLon = floatval($markerLon);
					$markerType = basename($markerType);
					$this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType);
			}
			
		}
		if($_GET['maptype']){
			if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
		}
	}

	public function lonToTile($long, $zoom){
		return (($long + 180) / 360) * pow(2, $zoom);
	}

	public function latToTile($lat, $zoom){
		return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom);
	}

	public function initCoords(){
		$this->centerX = $this->lonToTile($this->lon, $this->zoom);
		$this->centerY = $this->latToTile($this->lat, $this->zoom);
		$this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize);
		$this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize);
	}

	public function createBaseMap(){
		$this->image = imagecreatetruecolor($this->width, $this->height);
		$startX = floor($this->centerX-($this->width/$this->tileSize)/2);
		$startY = floor($this->centerY-($this->height/$this->tileSize)/2);
		$endX = ceil($this->centerX+($this->width/$this->tileSize)/2);
		$endY = ceil($this->centerY+($this->height/$this->tileSize)/2);
		$this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize);
		$this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize);
		$this->offsetX += floor($this->width/2);
		$this->offsetY += floor($this->height/2);
		$this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize;
		$this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize;

		for($x=$startX; $x<=$endX; $x++){
			for($y=$startY; $y<=$endY; $y++){
				$url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
				$tileData = $this->fetchTile($url);
				if($tileData){
					$tileImage = imagecreatefromstring($tileData);
				} else {
					$tileImage = imagecreate($this->tileSize,$this->tileSize);
					$color = imagecolorallocate($tileImage, 255, 255, 255);
					@imagestring($tileImage,1,127,127,'err',$color);
				}
				$destX = ($x-$startX)*$this->tileSize+$this->offsetX;
				$destY = ($y-$startY)*$this->tileSize+$this->offsetY;
				imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
			}
		}
	}


	public function placeMarkers(){
		// loop thru marker array
		foreach($this->markers as $marker){
			// set some local variables
			$markerLat = $marker['lat'];
			$markerLon = $marker['lon'];
			$markerType = $marker['type'];
			// clear variables from previous loops
			$markerFilename = '';
			$markerShadow = '';
			$matches = false;
			// check for marker type, get settings from markerPrototypes
			if($markerType){
				foreach($this->markerPrototypes as $markerPrototype){ 
					if(preg_match($markerPrototype['regex'],$markerType,$matches)){
						$markerFilename = $matches[0].$markerPrototype['extension'];
						if($markerPrototype['offsetImage']){
							list($markerImageOffsetX, $markerImageOffsetY)  = split(",",$markerPrototype['offsetImage']);
						}
						$markerShadow = $markerPrototype['shadow'];
						if($markerShadow){
							list($markerShadowOffsetX, $markerShadowOffsetY)  = split(",",$markerPrototype['offsetShadow']);
						} 
					}
				}
			}

			// check required files or set default
			if($markerFilename == '' || !file_exists($this->markerBaseDir.'/'.$markerFilename)){
				$markerIndex++;
				$markerFilename = 'lightblue'.$markerIndex.'.png';
				$markerImageOffsetX = 0;
				$markerImageOffsetY = -19;					}
			
			// create img resource
			if(file_exists($this->markerBaseDir.'/'.$markerFilename)){
				$markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename);
			} else {
				$markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png');				
			}
			
			// check for shadow + create shadow recource
			if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){
				$markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow);
			}

			// calc position
			$destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom)));
			$destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom)));

			// copy shadow on basemap
			if($markerShadow && $markerShadowImg){
				imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY), 
							0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
			}
			
			// copy marker on basemap above shadow
			imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY), 
							0, 0, imagesx($markerImg), imagesy($markerImg));
		
	};
}


	public function tileUrlToFilename($url){
		return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url);
	}

	public function checkTileCache($url){
		$filename = $this->tileUrlToFilename($url);
		if(file_exists($filename)){
			return file_get_contents($filename);
		}
	}
	
	public function checkMapCache(){
		$this->mapCacheID = md5($this->serializeParams());
		$filename = $this->mapCacheIDToFilename();
		if(file_exists($filename)) return true;
	}

	public function serializeParams(){		
		return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype));
	}
	
	public function mapCacheIDToFilename(){
		if(!$this->mapCacheFile){
			$this->mapCacheFile = $this->mapCacheBaseDir."/".$this->maptype."/".$this->zoom."/cache_".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4);
		}
		return $this->mapCacheFile.".".$this->mapCacheExtension;
	}


	public function mkdir_recursive($pathname, $mode){
		is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode);
		return is_dir($pathname) || @mkdir($pathname, $mode);
	}
	public function writeTileToCache($url, $data){
		$filename = $this->tileUrlToFilename($url);
		$this->mkdir_recursive(dirname($filename),0777);
		file_put_contents($filename, $data);
	}
	
	public function fetchTile($url){
		if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
		$ch = curl_init(); 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
		curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
		curl_setopt($ch, CURLOPT_URL, $url); 
		$tile = curl_exec($ch); 
		curl_close($ch); 
		if($tile && $this->useTileCache){
			$this->writeTileToCache($url,$tile);
		}
		return $tile;

	}

	public function copyrightNotice(){
			$logoImg = imagecreatefrompng($this->osmLogo);
			imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));
		
	}
	
	public function sendHeader(){
		header('Content-Type: image/png');
		$expires = 60*60*24*14;
		header("Pragma: public");
		header("Cache-Control: maxage=".$expires);
		header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
	}

	public function makeMap(){
		$this->initCoords();		
		$this->createBaseMap();
		if(count($this->markers))$this->placeMarkers();
		if($this->osmLogo) $this->copyrightNotice();
	}

	public function showMap(){
		$this->parseParams();
		if($this->useMapCache){
			// use map cache, so check cache for map
			if(!$this->checkMapCache()){
				// map is not in cache, needs to be build
				$this->makeMap();
				$this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777);
				imagepng($this->image,$this->mapCacheIDToFilename(),9);
				$this->sendHeader();	
				if(file_exists($this->mapCacheIDToFilename())){
					return file_get_contents($this->mapCacheIDToFilename());
				} else {
					return imagepng($this->image);		
				}
			} else {
				// map is in cache
				$this->sendHeader();	
				return file_get_contents($this->mapCacheIDToFilename());
			}

		} else {
			// no cache, make map, send headers and deliver png
			$this->makeMap();
			$this->sendHeader();	
			return imagepng($this->image);		
			
		}
	}

}

$map = new staticMapLite();
print $map->showMap();

?>
Commit	Line	Data
188cb5f8	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',
668561ff UO	40	'osmde' => 'http://osm.rrze.fau.de/osmde/{Z}/{X}/{Y}.png',
	41	'osmorglowzoom' => 'http://osm.rrze.fau.de/lowzoom/{Z}/{X}/{Y}.png',
	42	'luftbilderl' => 'http://osm.rrze.fau.de/luftbilderl/{Z}/{X}/{Y}.png'
188cb5f8	43	);
	44
	45	protected $tileDefaultSrc = 'osmde';
	46	protected $markerBaseDir = '/var/www/staticmaplite/images/markers';
	47	protected $osmLogo = '/var/www/staticmaplite/images/osm_logo.png';
	48
	49	protected $markerPrototypes = array(// found at http://www.mapito.net/map-marker-icons.html
	50	'lighblue' => array('regex'=>'/^lightblue([0-9]+)$/',
	51	'extension'=>'.png',
	52	'shadow'=>false,
	53	'offsetImage'=>'0,-19',
	54	'offsetShadow'=>false
	55	),
	56	// openlayers std markers
	57	'ol-marker'=> array('regex'=>'/^ol-marker(\|-blue\|-gold\|-green)+$/',
	58	'extension'=>'.png',
	59	'shadow'=>'../marker_shadow.png',
	60	'offsetImage'=>'-10,-25',
	61	'offsetShadow'=>'-1,-13'
	62	),
	63	// taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
	64	'ylw'=> array('regex'=>'/^(pink\|purple\|red\|ltblu\|ylw)-pushpin$/',
	65	'extension'=>'.png',
	66	'shadow'=>'../marker_shadow.png',
	67	'offsetImage'=>'-10,-32',
	68	'offsetShadow'=>'-1,-13'
	69	)
	70
	71	);
	72
	73
	74
	75	# No point in caching - our source is localhost
	76	protected $useTileCache = false;
	77	protected $tileCacheBaseDir = 'cache/tiles';
	78
	79	protected $useMapCache = false;
	80	protected $mapCacheBaseDir = 'cache/maps';
	81	protected $mapCacheID = '';
	82	protected $mapCacheFile = '';
	83	protected $mapCacheExtension = 'png';
	84
	85	protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
	86	protected $centerX, $centerY, $offsetX, $offsetY;
	87
	88	public function __construct(){
	89	$this->zoom = 0;
	90	$this->lat = 0;
	91	$this->lon = 0;
	92	$this->width = 500;
	93	$this->height = 350;
	94	$this->markers = array();
	95	$this->maptype = $this->tileDefaultSrc;
	96	}
	97
	98	public function parseParams(){
	99	global $_GET;
	100
	101	// get zoom from GET paramter
	102	$this->zoom = $_GET['zoom']?intval($_GET['zoom']):0;
	103	if($this->zoom>18)$this->zoom = 18;
	104
	105	// get lat and lon from GET paramter
	106	list($this->lat,$this->lon) = split(',',$_GET['center']);
107	$this->lat = floatval($this->lat);
108	$this->lon = floatval($this->lon);
109
110	// get zoom from GET paramter
111	if($_GET['size']){
112	list($this->width, $this->height) = split('x',$_GET['size']);
113	$this->width = intval($this->width);
114	if($this->width > $this->maxWidth) $this->width = $this->maxWidth;
115	$this->height = intval($this->height);
116	if($this->height > $this->maxHeight) $this->height = $this->maxHeight;
117	}
118	if($_GET['markers']){
119	$markers = split('%7C\|\\|',$_GET['markers']);
120	foreach($markers as $marker){
121	list($markerLat, $markerLon, $markerType) = split(',',$marker);
122	$markerLat = floatval($markerLat);
123	$markerLon = floatval($markerLon);
124	$markerType = basename($markerType);
125	$this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType);
126	}
127
128	}
129	if($_GET['maptype']){
130	if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
131	}
132	}
133
134	public function lonToTile($long, $zoom){
135	return (($long + 180) / 360) * pow(2, $zoom);
136	}
137
138	public function latToTile($lat, $zoom){
139	return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom);
140	}
141
142	public function initCoords(){
143	$this->centerX = $this->lonToTile($this->lon, $this->zoom);
144	$this->centerY = $this->latToTile($this->lat, $this->zoom);
145	$this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize);
146	$this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize);
147	}
148
149	public function createBaseMap(){
150	$this->image = imagecreatetruecolor($this->width, $this->height);
151	$startX = floor($this->centerX-($this->width/$this->tileSize)/2);
152	$startY = floor($this->centerY-($this->height/$this->tileSize)/2);
153	$endX = ceil($this->centerX+($this->width/$this->tileSize)/2);
154	$endY = ceil($this->centerY+($this->height/$this->tileSize)/2);
155	$this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize);
156	$this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize);
157	$this->offsetX += floor($this->width/2);
158	$this->offsetY += floor($this->height/2);
159	$this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize;
160	$this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize;
161
162	for($x=$startX; $x<=$endX; $x++){
163	for($y=$startY; $y<=$endY; $y++){
164	$url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
165	$tileData = $this->fetchTile($url);
166	if($tileData){
167	$tileImage = imagecreatefromstring($tileData);
168	} else {
169	$tileImage = imagecreate($this->tileSize,$this->tileSize);
170	$color = imagecolorallocate($tileImage, 255, 255, 255);
171	@imagestring($tileImage,1,127,127,'err',$color);
172	}
173	$destX = ($x-$startX)*$this->tileSize+$this->offsetX;
174	$destY = ($y-$startY)*$this->tileSize+$this->offsetY;
175	imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
176	}
177	}
178	}
179
180
181	public function placeMarkers(){
182	// loop thru marker array
183	foreach($this->markers as $marker){
184	// set some local variables
185	$markerLat = $marker['lat'];
186	$markerLon = $marker['lon'];
187	$markerType = $marker['type'];
188	// clear variables from previous loops
189	$markerFilename = '';
190	$markerShadow = '';
191	$matches = false;
192	// check for marker type, get settings from markerPrototypes
193	if($markerType){
194	foreach($this->markerPrototypes as $markerPrototype){
195	if(preg_match($markerPrototype['regex'],$markerType,$matches)){
196	$markerFilename = $matches[0].$markerPrototype['extension'];
197	if($markerPrototype['offsetImage']){
198	list($markerImageOffsetX, $markerImageOffsetY) = split(",",$markerPrototype['offsetImage']);
199	}
200	$markerShadow = $markerPrototype['shadow'];
201	if($markerShadow){
202	list($markerShadowOffsetX, $markerShadowOffsetY) = split(",",$markerPrototype['offsetShadow']);
203	}
204	}
205	}
206	}
207
208	// check required files or set default
209	if($markerFilename == '' \|\| !file_exists($this->markerBaseDir.'/'.$markerFilename)){
210	$markerIndex++;
211	$markerFilename = 'lightblue'.$markerIndex.'.png';
212	$markerImageOffsetX = 0;
213	$markerImageOffsetY = -19; }
214
215	// create img resource
216	if(file_exists($this->markerBaseDir.'/'.$markerFilename)){
217	$markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename);
218	} else {
219	$markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png');
220	}
221
222	// check for shadow + create shadow recource
223	if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){
224	$markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow);
225	}
226
227	// calc position
228	$destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom)));
229	$destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom)));
230
231	// copy shadow on basemap
232	if($markerShadow && $markerShadowImg){
233	imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY),
234	0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
235	}
236
237	// copy marker on basemap above shadow
238	imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY),
239	0, 0, imagesx($markerImg), imagesy($markerImg));
240
241	};
242	}
243
244
245
246	public function tileUrlToFilename($url){
247	return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url);
248	}
249
250	public function checkTileCache($url){
251	$filename = $this->tileUrlToFilename($url);
252	if(file_exists($filename)){
253	return file_get_contents($filename);
254	}
255	}
256
257	public function checkMapCache(){
258	$this->mapCacheID = md5($this->serializeParams());
259	$filename = $this->mapCacheIDToFilename();
260	if(file_exists($filename)) return true;
261	}
262
263	public function serializeParams(){
264	return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype));
265	}
266
267	public function mapCacheIDToFilename(){
268	if(!$this->mapCacheFile){
269	$this->mapCacheFile = $this->mapCacheBaseDir."/".$this->maptype."/".$this->zoom."/cache_".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4);
270	}
271	return $this->mapCacheFile.".".$this->mapCacheExtension;
272	}
273
274
275
276	public function mkdir_recursive($pathname, $mode){
277	is_dir(dirname($pathname)) \|\| $this->mkdir_recursive(dirname($pathname), $mode);
278	return is_dir($pathname) \|\| @mkdir($pathname, $mode);
279	}
280	public function writeTileToCache($url, $data){
281	$filename = $this->tileUrlToFilename($url);
282	$this->mkdir_recursive(dirname($filename),0777);
283	file_put_contents($filename, $data);
284	}
285
286	public function fetchTile($url){
287	if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
288	$ch = curl_init();
289	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
290	curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
291	curl_setopt($ch, CURLOPT_URL, $url);
292	$tile = curl_exec($ch);
293	curl_close($ch);
294	if($tile && $this->useTileCache){
295	$this->writeTileToCache($url,$tile);
296	}
297	return $tile;
298
299	}
300
301	public function copyrightNotice(){
302	$logoImg = imagecreatefrompng($this->osmLogo);
303	imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));
304
305	}
306
307	public function sendHeader(){
308	header('Content-Type: image/png');
309	$expires = 606024*14;
310	header("Pragma: public");
311	header("Cache-Control: maxage=".$expires);
312	header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
313	}
314
315	public function makeMap(){
316	$this->initCoords();
317	$this->createBaseMap();
318	if(count($this->markers))$this->placeMarkers();
319	if($this->osmLogo) $this->copyrightNotice();
320	}
321
322	public function showMap(){
323	$this->parseParams();
324	if($this->useMapCache){
325	// use map cache, so check cache for map
326	if(!$this->checkMapCache()){
327	// map is not in cache, needs to be build
328	$this->makeMap();
329	$this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777);
330	imagepng($this->image,$this->mapCacheIDToFilename(),9);
331	$this->sendHeader();
332	if(file_exists($this->mapCacheIDToFilename())){
333	return file_get_contents($this->mapCacheIDToFilename());
334	} else {
335	return imagepng($this->image);
336	}
337	} else {
338	// map is in cache
339	$this->sendHeader();
340	return file_get_contents($this->mapCacheIDToFilename());
341	}
342
343	} else {
344	// no cache, make map, send headers and deliver png
345	$this->makeMap();
346	$this->sendHeader();
347	return imagepng($this->image);
348
349	}
350	}
351
352	}
353
354	$map = new staticMapLite();
355	print $map->showMap();
356
357	?>