--- a/busui/staticmaplite/staticmap.php +++ b/busui/staticmaplite/staticmap.php @@ -1,1 +1,273 @@ - +<?php + +/** + * staticMapLite 0.02 + * + * 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 $tileSize = 256; + protected $tileSrcUrl = array( 'mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png', + 'osmarenderer' => 'http://c.tah.openstreetmap.org/Tiles/tile/{Z}/{X}/{Y}.png', + 'cycle' => 'http://c.andy.sandbox.cloudmade.com/tiles/cycle/{Z}/{X}/{Y}.png' + ); + + protected $tileDefaultSrc = 'mapnik'; + protected $markerBaseDir = 'images/markers'; + protected $osmLogo = 'images/osm_logo.png'; + + protected $useTileCache = true; + protected $tileCacheBaseDir = 'cache/tiles'; + + protected $useMapCache = true; + 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); + $this->height = intval($this->height); + } + if($_GET['markers']){ + $markers = split('%7C|\|',$_GET['markers']); + foreach($markers as $marker){ + list($markerLat, $markerLon, $markerImage) = split(',',$marker); + $markerLat = floatval($markerLat); + $markerLon = floatval($markerLon); + $markerImage = basename($markerImage); + $this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'image'=>$markerImage); + } + + } + 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]); + $tileImage = imagecreatefromstring($this->fetchTile($url)); + $destX = ($x-$startX)*$this->tileSize+$this->offsetX; + $destY = ($y-$startY)*$this->tileSize+$this->offsetY; + imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize); + } + } + } + + + public function placeMarkers(){ + foreach($this->markers as $marker){ + $markerLat = $marker['lat']; + $markerLon = $marker['lon']; + $markerImage = $marker['image']; + $markerIndex++; + $markerFilename = $markerImage?(file_exists($this->markerBaseDir.'/'.$markerImage.".png")?$markerImage:'lightblue'.$markerIndex):'lightblue'.$markerIndex; + if(file_exists($this->markerBaseDir.'/'.$markerFilename.".png")){ + $markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename.".png"); + } else { + $markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png'); + } + $destX = floor(($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))); + $destY = $destY - imagesy($markerImg); + + imagecopy($this->image, $markerImg, $destX, $destY, 0, 0, imagesx($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 = $this->mapCacheBaseDir."/".substr($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($ch); + if($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(); + +?>