BarcodeGenerator::qr_encode

private function qr_encode($data, $ecl) {
	list($mode, $vers, $ec, $data) = $this->qr_encode_data($data, $ecl);
	$data = $this->qr_encode_ec($data, $ec, $vers);
	list($size, $mtx) = $this->qr_create_matrix($vers, $data);
	list($mask, $mtx) = $this->qr_apply_best_mask($mtx, $size);
	$mtx = $this->qr_finalize_matrix($mtx, $size, $ecl, $mask, $vers);
	return array(
		'g' => 'm',
		'q' => array(4, 4, 4, 4),
		's' => array($size, $size),
		'b' => $mtx
	);
}