919770b1dd
git-svn-id: http://svn.code.sf.net/p/staticmaplite/code@5 3c7674d3-d6c2-4d0e-87b7-95661b9333b9
337 lines
11 KiB
PHP
337 lines
11 KiB
PHP
<?php
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/**
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* staticMapLite 0.03
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*
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* Copyright 2009 Gerhard Koch
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @author Gerhard Koch <gerhard.koch AT ymail.com>
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*
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* USAGE:
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*
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* 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
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*
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*/
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error_reporting(0);
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ini_set('display_errors','off');
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Class staticMapLite {
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protected $maxWidth = 1024;
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protected $maxHeight = 1024;
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protected $tileSize = 256;
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protected $tileSrcUrl = array( 'mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
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'osmarenderer' => 'http://c.tah.openstreetmap.org/Tiles/tile/{Z}/{X}/{Y}.png',
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'cycle' => 'http://c.andy.sandbox.cloudmade.com/tiles/cycle/{Z}/{X}/{Y}.png'
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);
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protected $tileDefaultSrc = 'mapnik';
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protected $markerBaseDir = 'images/markers';
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protected $osmLogo = 'images/osm_logo.png';
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protected $markerPrototypes = array('lighblue' => array('regex'=>'/^lightblue([0-9]+)$/',
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'extension'=>'.png',
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'shadow'=>false,
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'offsetImage'=>'0,-19',
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'offsetShadow'=>false
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),
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'ol-marker'=> array('regex'=>'/^ol-marker(|-blue|-gold|-green)+$/',
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'extension'=>'ol-marker{1}.png',
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'shadow'=>'../marker_shadow.png',
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'offsetImage'=>'-10,-25',
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'offsetShadow'=>'-1,-13'
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)
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);
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protected $useTileCache = true;
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protected $tileCacheBaseDir = 'cache/tiles';
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protected $useMapCache = false;
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protected $mapCacheBaseDir = 'cache/maps';
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protected $mapCacheID = '';
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protected $mapCacheFile = '';
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protected $mapCacheExtension = 'png';
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protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
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protected $centerX, $centerY, $offsetX, $offsetY;
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public function __construct(){
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$this->zoom = 0;
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$this->lat = 0;
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$this->lon = 0;
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$this->width = 500;
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$this->height = 350;
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$this->markers = array();
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$this->maptype = $this->tileDefaultSrc;
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}
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public function parseParams(){
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global $_GET;
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// get zoom from GET paramter
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$this->zoom = $_GET['zoom']?intval($_GET['zoom']):0;
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if($this->zoom>18)$this->zoom = 18;
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// get lat and lon from GET paramter
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list($this->lat,$this->lon) = split(',',$_GET['center']);
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$this->lat = floatval($this->lat);
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$this->lon = floatval($this->lon);
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// get zoom from GET paramter
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if($_GET['size']){
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list($this->width, $this->height) = split('x',$_GET['size']);
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$this->width = intval($this->width);
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if($this->width > $this->maxWidth) $this->width = $this->maxWidth;
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$this->height = intval($this->height);
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if($this->height > $this->maxHeight) $this->height = $this->maxHeight;
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}
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if($_GET['markers']){
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$markers = split('%7C|\|',$_GET['markers']);
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foreach($markers as $marker){
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list($markerLat, $markerLon, $markerType) = split(',',$marker);
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$markerLat = floatval($markerLat);
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$markerLon = floatval($markerLon);
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$markerType = basename($markerType);
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$this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType);
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}
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}
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if($_GET['maptype']){
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if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
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}
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}
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public function lonToTile($long, $zoom){
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return (($long + 180) / 360) * pow(2, $zoom);
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}
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public function latToTile($lat, $zoom){
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return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom);
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}
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public function initCoords(){
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$this->centerX = $this->lonToTile($this->lon, $this->zoom);
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$this->centerY = $this->latToTile($this->lat, $this->zoom);
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$this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize);
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$this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize);
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}
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public function createBaseMap(){
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$this->image = imagecreatetruecolor($this->width, $this->height);
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$startX = floor($this->centerX-($this->width/$this->tileSize)/2);
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$startY = floor($this->centerY-($this->height/$this->tileSize)/2);
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$endX = ceil($this->centerX+($this->width/$this->tileSize)/2);
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$endY = ceil($this->centerY+($this->height/$this->tileSize)/2);
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$this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize);
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$this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize);
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$this->offsetX += floor($this->width/2);
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$this->offsetY += floor($this->height/2);
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$this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize;
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$this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize;
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for($x=$startX; $x<=$endX; $x++){
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for($y=$startY; $y<=$endY; $y++){
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$url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
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$tileImage = imagecreatefromstring($this->fetchTile($url));
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$destX = ($x-$startX)*$this->tileSize+$this->offsetX;
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$destY = ($y-$startY)*$this->tileSize+$this->offsetY;
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imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
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}
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}
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}
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public function placeMarkers(){
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// loop thru marker array
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foreach($this->markers as $marker){
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// set some local variables
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$markerLat = $marker['lat'];
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$markerLon = $marker['lon'];
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$markerType = $marker['type'];
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// clear variables from previous loops
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$markerFilename = '';
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$markerShadow = '';
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$matches = false;
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// check for marker type, get settings from markerPrototypes
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if($markerType){
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foreach($this->markerPrototypes as $markerPrototype){
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if(preg_match($markerPrototype['regex'],$markerType,$matches)){
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$markerFilename = $matches[0].$markerPrototype['extension'];
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if($markerPrototype['offsetImage']){
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list($markerImageOffsetX, $markerImageOffsetY) = split(",",$markerPrototype['offsetImage']);
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}
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$markerShadow = $markerPrototype['shadow'];
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if($markerShadow){
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list($markerShadowOffsetX, $markerShadowOffsetY) = split(",",$markerPrototype['offsetShadow']);
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}
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}
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}
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}
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// check required files or set default
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if(!file_exists($this->markerBaseDir.'/'.$markerFilename)){
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$markerIndex++;
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$markerFilename = 'lightblue'.$markerIndex.'.png';
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$markerImageOffsetX = 0;
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$markerImageOffsetY = -19;
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}
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// create img resource
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if(file_exists($this->markerBaseDir.'/'.$markerFilename)){
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$markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename);
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} else {
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$markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png');
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}
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// check for shadow + create shadow recource
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if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){
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$markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow);
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}
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// calc position
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$destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom)));
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$destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom)));
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// copy shadow on basemap
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if($markerShadow && $markerShadowImg){
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imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY),
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0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
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}
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// copy marker on basemap above shadow
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imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY),
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0, 0, imagesx($markerImg), imagesy($markerImg));
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};
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}
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public function tileUrlToFilename($url){
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return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url);
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}
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public function checkTileCache($url){
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$filename = $this->tileUrlToFilename($url);
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if(file_exists($filename)){
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return file_get_contents($filename);
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}
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}
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public function checkMapCache(){
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$this->mapCacheID = md5($this->serializeParams());
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$filename = $this->mapCacheIDToFilename();
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if(file_exists($filename)) return true;
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}
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public function serializeParams(){
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return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype));
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}
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public function mapCacheIDToFilename(){
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if(!$this->mapCacheFile){
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$this->mapCacheFile = $this->mapCacheBaseDir."/".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4);
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}
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return $this->mapCacheFile.".".$this->mapCacheExtension;
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}
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public function mkdir_recursive($pathname, $mode){
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is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode);
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return is_dir($pathname) || @mkdir($pathname, $mode);
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}
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public function writeTileToCache($url, $data){
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$filename = $this->tileUrlToFilename($url);
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$this->mkdir_recursive(dirname($filename),0777);
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file_put_contents($filename, $data);
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}
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public function fetchTile($url){
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if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
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curl_setopt($ch, CURLOPT_URL, $url);
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$tile = curl_exec($ch);
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curl_close($ch);
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if($this->useTileCache){
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$this->writeTileToCache($url,$tile);
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}
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return $tile;
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}
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public function copyrightNotice(){
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$logoImg = imagecreatefrompng($this->osmLogo);
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imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));
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}
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public function sendHeader(){
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header('Content-Type: image/png');
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$expires = 60*60*24*14;
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header("Pragma: public");
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header("Cache-Control: maxage=".$expires);
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header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
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}
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public function makeMap(){
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$this->initCoords();
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$this->createBaseMap();
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if(count($this->markers))$this->placeMarkers();
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if($this->osmLogo) $this->copyrightNotice();
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}
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public function showMap(){
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$this->parseParams();
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if($this->useMapCache){
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// use map cache, so check cache for map
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if(!$this->checkMapCache()){
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// map is not in cache, needs to be build
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$this->makeMap();
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$this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777);
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imagepng($this->image,$this->mapCacheIDToFilename(),9);
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$this->sendHeader();
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if(file_exists($this->mapCacheIDToFilename())){
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return file_get_contents($this->mapCacheIDToFilename());
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} else {
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return imagepng($this->image);
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}
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} else {
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// map is in cache
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$this->sendHeader();
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return file_get_contents($this->mapCacheIDToFilename());
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}
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} else {
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// no cache, make map, send headers and deliver png
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$this->makeMap();
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$this->sendHeader();
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return imagepng($this->image);
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}
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}
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}
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$map = new staticMapLite();
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print $map->showMap();
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?>
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