From: Raphaël Gertz <git@rapsys.eu>
Date: Sun, 1 Nov 2020 21:29:05 +0000 (+0100)
Subject: Add osm map generator
X-Git-Url: https://git.rapsys.eu/cdn/commitdiff_plain/f003b55a5344490d1dadd881c4b68cbd4aee79f4

Add osm map generator
---

diff --git a/picture/marker_shadow.png b/picture/marker_shadow.png
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diff --git a/picture/markers/ltblu-pushpin.png b/picture/markers/ltblu-pushpin.png
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diff --git a/picture/markers/ol-marker-blue.png b/picture/markers/ol-marker-blue.png
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diff --git a/picture/markers/pink-pushpin.png b/picture/markers/pink-pushpin.png
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diff --git a/picture/osm_logo.png b/picture/osm_logo.png
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diff --git a/public/osm.php b/public/osm.php
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--- /dev/null
+++ b/public/osm.php
@@ -0,0 +1,268 @@
+<?php
+
+//Check for parameter availability
+if (!isset($_GET['t'])||!isset($_GET['lt'])||!isset($_GET['ln'])||!isset($_GET['z'])||!isset($_GET['w'])||!isset($_GET['h'])||!isset($_GET['e'])) {
+	//Check for uri presence
+	if (empty($_SERVER['REQUEST_URI'])) {
+		throw new Exception('No request uri');
+	}
+	//Check for script name in request uri
+	if (($pos = strpos($_SERVER['REQUEST_URI'], $_SERVER['SCRIPT_NAME'])) !== false) {
+		$_SERVER['REQUEST_URI'] = substr($_SERVER['REQUEST_URI'], 0, $pos).substr($_SERVER['REQUEST_URI'], $pos+strlen($_SERVER['SCRIPT_NAME']));
+	}
+	//Check uri matching
+	if (!preg_match('!^/(?<t>osm|osmar|cycle|mapnik)/(?<lt>-?[0-9\.]+),(?<ln>-?[0-9\.]+),(?<z>[0-9]+)/(?<w>[0-9]+)x(?<h>[0-9]+)\.(?<e>gif|jpe?g|png)$!', $_SERVER['REQUEST_URI'], $_GET)) {
+		throw new Exception('No request match');
+	}
+	//Cleanup match array
+	unset($_GET[0], $_GET[1], $_GET[2], $_GET[3], $_GET[4], $_GET[5], $_GET[6], $_GET[7]);
+}
+
+//Check latitude value
+if (abs($lt = floatval($_GET['lt'])) > 90) {
+	throw new Exception('Invalid latitude');
+}
+
+//Check longitude value
+if (abs($ln = floatval($_GET['ln'])) > 180) {
+	throw new Exception('Invalid longitude');
+}
+
+//Check zoom value
+if (($z = abs(intval($_GET['z']))) > 20) {
+	throw new Exception('Invalid zoom');
+}
+
+//Check width value
+if (($w = abs(intval($_GET['w']))) > 1024) {
+	throw new Exception('Invalid width');
+}
+
+//Check height value
+if (($h = abs(intval($_GET['h']))) > 1024) {
+	throw new Exception('Invalid height');
+}
+
+//Check type value
+if (($t = ($_GET['t']=='mapnik'?'osm':$_GET['t'])) != 'osm' && $t != 'osmar' && $t != 'cycle') {
+	throw new Exception('Invalid extension');
+}
+
+//Check extension value
+if (($e = ($_GET['e']=='jpeg'?'jpg':$_GET['e'])) != 'gif' && $e != 'jpg' && $e != 'png') {
+	throw new Exception('Invalid extension');
+}
+
+//Check imagick presence
+if (!class_exists('Imagick')) {
+	throw new Exception('No imagick class');
+}
+
+class Osm {
+	//Set the tile size
+	const tz = 256;
+
+	//The imagick instance
+	private $im;
+
+	//Set tile sources
+	//XXX: see https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Tile_servers
+	protected $uris = [
+		'osm' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
+		'osmar' => 'http://otile1.mqcdn.com/tiles/1.0.0/osm/{Z}/{X}/{Y}.png',
+		'cycle' => 'http://a.tile.opencyclemap.org/cycle/{Z}/{X}/{Y}.png',
+	];
+
+	function __construct($t, $lt, $ln, $z, $w, $h, $e) {
+		//Get tile xy
+		$tx = floor($cx = $this->lnToTx($ln, $z));
+		$ty = floor($cy = $this->ltToTy($lt, $z));
+
+		//Calculate start xy
+		$sx = floor(($tx * self::tz - $w) / self::tz);
+		$sy = floor(($ty * self::tz - $h) / self::tz);
+
+		//Calculate end xy
+		$ex = floor(($tx * self::tz + $w) / self::tz);
+		$ey = floor(($ty * self::tz + $h) / self::tz);
+
+		//Create the base image
+		$this->im = new Imagick();
+		$this->im->newImage($w, $h, new ImagickPixel('white'), $e);
+
+		for($x = $sx; $x <= $ex; $x++) {
+			for($y = $sy; $y <= $ey; $y++) {
+				//Set file
+				$file = '../cache/'.$z.'/'.$x.'/'.$y.'.png';
+				//Create cache directory
+				if (!is_dir($dir = dirname($file))) {
+					mkdir($dir, 0777, true);
+				}
+				//Fetch file in cache
+				if (!file_exists($file)) {
+					$url = str_replace(['{Z}', '{X}', '{Y}'], [$z, $x, $y], $this->uris[$t]);
+					file_put_contents($dir.'/'.$y.'.png', file_get_contents($url));
+				}
+
+				//Set dest x to
+                		#$dx = ($x - floor($this->centerX - ($this->width / $this->tileSize) / 2)) * $this->tileSize + floor((floor($this->centerX) - $this->centerX) * $this->tileSize);
+				$dx = ($x - floor($cx - ($w / self::tz) / 2)) * self::tz + floor(($tx - $cx) * self::tz);
+				#$destY = ($y - $startY) * $this->tileSize + $this->offsetY;
+				$dy = ($y - floor($cy - ($h / self::tz) / 2)) * self::tz + floor(($ty - $cy) * self::tz);
+
+				//Create tile image
+				$tm = new Imagick($file);
+				//Add it at destination
+				$this->im->compositeImage($tm, imagick::COMPOSITE_COPY, $dx, $dy);
+			}
+		}
+		//Add circle
+		//XXX: see https://www.php.net/manual/fr/imagick.examples-1.php#example-3916
+		$draw = new ImagickDraw();
+		$draw->setFillColor('#cff');
+		$draw->setStrokeColor('#00c3f9');
+		$draw->setStrokeWidth(2);
+		$draw->circle($w/2 - 5, $h/2 - 5, $w/2 + 5, $h/2 + 5);
+		$this->im->drawImage($draw);
+		header('Content-Type: image/'.$e);
+		echo $this->im;
+	}
+
+	/**
+	 * Convert longitude to tile x number
+	 *
+	 * @see https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Lon..2Flat._to_tile_numbers_5
+	 *
+	 * @param $ln The longitude
+	 * @param $z The zoom
+	 *
+	 * @return The tile x
+	 */
+	public function lnToTx($ln, $z) {
+		return (($ln + 180) / 360) * pow(2, $z);
+	}
+
+	/**
+	 * Convert latitude to tile y number
+	 *
+	 * @see https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Lon..2Flat._to_tile_numbers_5
+	 *
+	 * @param $lt The latitude
+	 * @param $z The zoom
+	 *
+	 * @return The tile y
+	 */
+	public function ltToTy($lt, $z) {
+		return (1 - log(tan(deg2rad($lt)) + 1 / cos(deg2rad($lt))) / pi()) / 2 * pow(2, $z);
+	}
+
+	/**
+	 * Convert tile x to longitude
+	 *
+	 * @param $tx The tile x
+	 * @param $z The zoom
+	 *
+	 * @return $ln The longitude
+	 */
+	public function txToLn($tx, $z) {
+		return $tx / pow(2, $z) * 360.0 - 180.0;
+	}
+
+	/**
+	 * Convert tile y to latitude
+	 *
+	 * @param $ty The tile y
+	 * @param $z The zoom
+	 *
+	 * @return $lt The latitude
+	 */
+	public function tyToLt($ty, $z) {
+		return rad2deg(atan(sinh(pi() * (1 - 2 * $ty / pow(2, $z)))));
+	}
+
+}
+
+
+//Match url
+header('Content-Type: text/plain');
+
+$o = new Osm($t, $lt, $ln, $z, $w, $h, $e);
+
+		/*
+		//Get center x
+		$cx = $this->lnToTile($lt, $z);
+
+		//Get center y
+		$cy = $this->ltToTile($ln, $z);
+
+		//Get offset x
+		$ox = floor((floor($cx) - $cx) * $tz);
+		//Get offset y
+		$oy = floor((floor($cy) - $cy) * $tz);
+
+		//TODO: see this fucking computing
+		$sx = floor($cx - ($w / $tz) / 2);
+		$sy = floor($cy - ($h / $tz) / 2);
+		$ex = ceil($cx + ($w / $tz) / 2);
+		$ey = ceil($cy + ($h / $tz) / 2);
+
+		$ox = -floor(($cx - floor($cx)) * $tz);
+		$oy = -floor(($cy - floor($cy)) * $tz);
+
+		$ox += floor($w / 2);
+		$oy += floor($h / 2);
+		$ox += floor($sx - floor($cx)) * $tz;
+		$oy += floor($sy - floor($cy)) * $tz;
+		 */
+
+		#$ox = floor($tx - floor($tx)) * $tz;
+		#$oy = floor($ty - floor($ty)) * $tz;
+
+		#var_dump($sx);
+		#var_dump($cx);
+
+#		var_dump($sx);
+#		var_dump($tx);
+#		var_dump($ex);
+#		var_dump($sy);
+#		var_dump($ty);
+#		var_dump($ey);
+
+		#$im->newImage($w, $h, new ImagickPixel('transparent'), $e);
+
+		#for($x = $tx; $x <= $tx; $x++) {
+			#for($y = $ty; $y <= $ty; $y++) {
+#				$my = new Imagick($file);
+				#$my->newImage(5, 5, new ImagickPixel('black'), $e);
+
+#$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)) * $this->tileSize;
+#$destX = ($x - $startX) * $this->tileSize + $this->offsetX;
+#$destY = ($y - $startY) * $this->tileSize + $this->offsetY;
+#        $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);
+
+#				$im->compositeImage($my, imagick::COMPOSITE_COPY, $dx, $dy);
+#				#floor($w/2)-floor($tz/2), floor($h/2)-floor($tz/2));
+#				header('Content-Type: image/'.$e);
+#				echo $im;
+#				exit;
+#
+#				$dx = ($x - $sx) * $tz + floor($w / 2);
+#				$dy = ($y - $sy) * $tz + floor($h / 2);
+#
+#				var_dump($dx);
+#				var_dump($dy);
+#				var_dump(floor($w / 2) - floor(($tx - floor($tx))));
+#				exit;
+#
+				#var_dump($url);
+#				exit;
+#				$tm = new Imagick($url);
+#				$im->compositeImage($tm, imagick::COMPOSITE_OVER, $dx, $dy);