public function getCenter(ImageSize $size, ImageSize $cut = null)
{
$aSize = $size->toArray();
if (is_null($cut)) {
$cut = new ImageSize();
}
$aCut = $cut->toArray();
$x = round($aSize['w'] / 2);
$y = round($aSize['h'] / 2);
$x -= round($aCut['w'] / 2);
$y -= round($aCut['h'] / 2);
return new Coord2D($x, $y);
}
