+<?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);
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