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Code Issues Releases Wiki Activity

Empty tiles should have for @2x layers 512x512px Fixes #39

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This commit is contained in:
Dalibor Janák 2014-08-15 01:01:35 +02:00
parent 2bf8bf6d4b
commit 53b379cd67
1 changed files with 16 additions and 5 deletions
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21
tileserver.php
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@ -309,7 +309,11 @@ class Server {
$result = $this->db->query('select tile_data as t from tiles where zoom_level=' . $z . ' and tile_column=' . $x . ' and tile_row=' . $y);
$data = $result->fetchColumn();
if (!isset($data) || $data === FALSE) {
$this->getCleanTile();
//scale of tile (for retina tiles)
$result = $this->db->query('select value from metadata where name="scale"');
$resultdata = $result->fetchColumn();
$scale = isset($resultdata) && $resultdata !== FALSE ? $resultdata : 1;
$this->getCleanTile($scale);
} else {
$result = $this->db->query('select value from metadata where name="format"');
$resultdata = $result->fetchColumn();
@ -330,19 +334,26 @@ class Server {
fpassthru($fp);
die;
} else {
$this->getCleanTile();
//scale of tile (for retina tiles)
$meta = json_decode(file_get_contents($tileset.'/metadata.json'));
if(!isset($meta->scale)){
$meta->scale = 1;
}
$this->getCleanTile($meta->scale);
}
} else {
echo 'Server: Unknown or not specified dataset';
echo 'Serverr: Unknown or not specified dataset "'.$tileset.'"';
die;
}
}
/**
* Returns clean tile
* @param integer $scale Default 1
*/
public function getCleanTile() {
$png = imagecreatetruecolor(256, 256);
public function getCleanTile($scale = 1) {
$tileSize = 256 * $scale;
$png = imagecreatetruecolor($tileSize, $tileSize);
imagesavealpha($png, true);
$trans_colour = imagecolorallocatealpha($png, 0, 0, 0, 127);
imagefill($png, 0, 0, $trans_colour);