410 lines
15 KiB
PHP
410 lines
15 KiB
PHP
<?php
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/**
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* staticMapLite 0.3.1
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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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{
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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://otile1.mqcdn.com/tiles/1.0.0/osm/{Z}/{X}/{Y}.png',
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'cycle' => 'http://a.tile.opencyclemap.org/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 $markerPrototypes = array(
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// found at http://www.mapito.net/map-marker-icons.html
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'lighblue' => array('regex' => '/^lightblue([0-9]+)$/',
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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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// openlayers std markers
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'ol-marker' => array('regex' => '/^ol-marker(|-blue|-gold|-green)+$/',
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'extension' => '.png',
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'shadow' => '../marker_shadow.png',
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'offsetImage' => '-10,-25',
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'offsetShadow' => '-1,-13'
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),
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// taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
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'ylw' => array('regex' => '/^(pink|purple|red|ltblu|ylw)-pushpin$/',
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'extension' => '.png',
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'shadow' => '../marker_shadow.png',
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'offsetImage' => '-10,-32',
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'offsetShadow' => '-1,-13'
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),
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// http://svn.openstreetmap.org/sites/other/StaticMap/symbols/0.png
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'ojw' => array('regex' => '/^bullseye$/',
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'extension' => '.png',
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'shadow' => false,
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'offsetImage' => '-20,-20',
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'offsetShadow' => false
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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 = true;
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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, $offsetY;
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public function __construct()
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{
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$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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{
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global $_GET;
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if (!empty($_GET['show'])) {
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$this->parseOjwParams();
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}
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else {
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$this->parseLiteParams();
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}
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}
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public function parseLiteParams()
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{
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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) = explode(',', $_GET['center']);
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$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) = explode('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 = $this->maxHeight;
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}
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if (!empty($_GET['markers'])) {
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$markers = explode('|', $_GET['markers']);
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foreach ($markers as $marker) {
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list($markerLat, $markerLon, $markerType) = explode(',', $marker);
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$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 = $_GET['maptype'];
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}
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}
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public function parseOjwParams()
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{
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$this->lat = floatval($_GET['lat']);
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$this->lon = floatval($_GET['lon']);
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$this->zoom = intval($_GET['z']);
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$this->width = intval($_GET['w']);
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if ($this->width > $this->maxWidth) $this->width = $this->maxWidth;
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$this->height = intval($_GET['h']);
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if ($this->height > $this->maxHeight) $this->height = $this->maxHeight;
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if (!empty($_GET['mlat0'])) {
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$markerLat = floatval($_GET['mlat0']);
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if (!empty($_GET['mlon0'])) {
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$markerLon = floatval($_GET['mlon0']);
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$this->markers[] = array('lat' => $markerLat, 'lon' => $markerLon, 'type' => "bullseye");
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}
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}
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}
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public function lonToTile($long, $zoom)
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{
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return (($long + 180) / 360) * pow(2, $zoom);
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}
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public function latToTile($lat, $zoom)
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{
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return (1 - log(tan($lat * pi() / 180) + 1 / cos($lat * pi() / 180)) / pi()) / 2 * pow(2, $zoom);
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}
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public function initCoords()
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{
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$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) * $this->tileSize);
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}
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public function createBaseMap()
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{
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$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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$tileData = $this->fetchTile($url);
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if ($tileData) {
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$tileImage = imagecreatefromstring($tileData);
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} else {
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$tileImage = imagecreate($this->tileSize, $this->tileSize);
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$color = imagecolorallocate($tileImage, 255, 255, 255);
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@imagestring($tileImage, 1, 127, 127, 'err', $color);
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}
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$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, $this->tileSize);
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}
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}
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}
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public function placeMarkers()
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{
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// loop thru marker array
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foreach ($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) = explode(",", $markerPrototype['offsetImage']);
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}
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$markerShadow = $markerPrototype['shadow'];
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if ($markerShadow) {
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list($markerShadowOffsetX, $markerShadowOffsetY) = explode(",", $markerPrototype['offsetShadow']);
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}
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}
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}
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}
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// check required files or set default
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if ($markerFilename == '' || !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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{
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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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{
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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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{
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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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{
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return join("&", array($this->zoom, $this->lat, $this->lon, $this->width, $this->height, serialize($this->markers), $this->maptype));
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}
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public function mapCacheIDToFilename()
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{
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if (!$this->mapCacheFile) {
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$this->mapCacheFile = $this->mapCacheBaseDir . "/" . $this->maptype . "/" . $this->zoom . "/cache_" . substr($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, $mode)
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{
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is_dir(dirname($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, $data)
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{
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$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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{
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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 ($tile && $this->useTileCache) {
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$this->writeTileToCache($url, $tile);
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}
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return $tile;
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}
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public function copyrightNotice()
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{
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$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($logoImg));
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}
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public function sendHeader()
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{
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header('Content-Type: image/png');
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$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() + $expires) . ' GMT');
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}
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public function makeMap()
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{
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$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) $this->copyrightNotice();
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}
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public function showMap()
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{
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$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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