image.php

<?php

header('Content-type: image/jpeg');

// Fake user agent - PHP is blocked
ini_set('user_agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9');

$x = abs($_GET['x']);
$y = abs($_GET['y']);
$z = abs($_GET['z']);
$layers = $_GET['layers'];
if (empty($layers)) {
	$layers = array('satellite');
}

$streets_type = $_GET['streets_type'];
if ($streets_type != 'osm') {
	$streets_type = 'google';
}

$filename = $x.'/'.$y.'/'.$z;
if (in_array('satellite', $layers)) { $filename .= '_satellite'; }
if (in_array('streets', $layers)) { $filename .= '_streets-'.$streets_type; }
$filename .= '.jpg';

if (!file_exists('cache/'.$filename)) {
	$image = imagecreatetruecolor(256, 256);

	if (in_array('satellite', $layers)) {
		$image_satellite = imagecreatefromjpeg('http://khm0.google.com/kh/v=76&x='.$x.'&y='.$y.'&z='.$z.'&s=Galileo');
		imagecopyresampled($image, $image_satellite, 0, 0, 0, 0, 256, 256, 256, 256);
	}

	if (in_array('streets', $layers)) {
		if ($streets_type == 'google') {
			$image_streets = imagecreatefrompng('http://mt1.google.com/vt/lyrs=h@138&hl=en&x='.$x.'&s=&y='.$y.'&z='.$z.'&s=Galileo');
		} elseif ($streets_type == 'osm') {
			// OSM PNGs are not true color images, therefore we first need to
			// convert them so that we can set a transparent color.
			$image_streets = imagecreatetruecolor(256, 256);
			$image_streets_tmp = imagecreatefrompng('http://b.tile.openstreetmap.org/'.$z.'/'.$x.'/'.$y.'.png');
			imagecopy($image_streets, $image_streets_tmp, 0, 0, 0, 0, 256, 256);
			
			$transparent = imagecolorallocate($image_streets, 0xF1, 0xEE, 0xE8); // Transparent color
			imagecolortransparent($image_streets, $transparent);
		}
		imagecopymerge($image, $image_streets, 0, 0, 0, 0, 256, 256, 100);
	}

	@mkdir('cache/'.$x);
	@mkdir('cache/'.$x.'/'.$y);
	imagejpeg($image, 'cache/'.$filename, 100);
}

echo file_get_contents('cache/'.$filename);

?>