Image::saveAs

public function saveAs($file, $quality = 95, $format = null)
{
	if($quality <= 0 || $quality > 100)
	{
		$quality = 95;
	}

	if($this->engine->save($file, $quality, $format))
	{
		$this->setFileAttributes($file);

		return true;
	}
	return false;
}