/**
* get map tile from its numbers
*
* @param int $x x number of the tile
* @param int $y y number of the tile
* @param int $zoom map zoom
* @return Tile
*/
public function getTile($x, $y, $zoom)
{
$tx = $x;
$ty = $y;
$this->_validateTileNumbers($tx, $ty, $zoom);
if (!$this->_useTileImage) {
$tile = new EmptyTile($this->getTileWidth(), $this->getTileHeight(), $this->_imageHandler);
} else {
if ($this->_useCache && $this->_tileCache->hasTile($tx, $ty, $zoom)) {
//if tile image is in cache, take it from there
$image = $this->_tileCache->getTile($tx, $ty, $zoom);
$tile = new Tile($image);
} else {
$image = $this->_loadImage($this->_createUrl($tx, $ty, $zoom));
if ($image === false) {
//when loading an image failed
$tile = new EmptyTile($this->getTileWidth(), $this->getTileHeight(), $this->_imageHandler);
} else {
$this->_tileCache->addTile($image, $tx, $ty, $zoom);
$tile = new Tile($image);
}
}
}
$tile->setWorldMap($this->getWorldMap($zoom));
$tile->setTileData($x, $y, $zoom);
$tile->setImageHandler($this->_imageHandler);
return $tile;
}