BarcodeGenerator::dmtx_place_data

private function dmtx_place_data(&$mtx, $rows, $cols, $data) {
	$row = 4;
	$col = 0;
	$offset = 0;
	$length = count($data);
	while (($row < $rows || $col < $cols) && $offset < $length) {
		/* Corner cases. Literally. */
		if ($row == $rows && $col == 0) {
			$this->dmtx_place_1($mtx, $rows, $cols, $data[$offset++]);
		} else if ($row == $rows - 2 && $col == 0 && $cols % 4 != 0) {
			$this->dmtx_place_2($mtx, $rows, $cols, $data[$offset++]);
		} else if ($row == $rows - 2 && $col == 0 && $cols % 8 == 4) {
			$this->dmtx_place_3($mtx, $rows, $cols, $data[$offset++]);
		} else if ($row == $rows + 4 && $col == 2 && $cols % 8 == 0) {
			$this->dmtx_place_4($mtx, $rows, $cols, $data[$offset++]);
		}
		/* Up and to the right. */
		while ($row >= 0 && $col < $cols && $offset < $length) {
			if ($row < $rows && $col >= 0 && is_null($mtx[$row][$col])) {
				$b = $data[$offset++];
				$this->dmtx_place_0($mtx, $rows, $cols, $row, $col, $b);
			}
			$row -= 2;
			$col += 2;
		}
		$row += 1;
		$col += 3;
		/* Down and to the left. */
		while ($row < $rows && $col >= 0 && $offset < $length) {
			if ($row >= 0 && $col < $cols && is_null($mtx[$row][$col])) {
				$b = $data[$offset++];
				$this->dmtx_place_0($mtx, $rows, $cols, $row, $col, $b);
			}
			$row += 2;
			$col -= 2;
		}
		$row += 3;
		$col += 1;
	}
}