decodeRow method

@override Result decodeRow(int rowNumber, BitArray row, DecodeHint? hints)

Attempts to decode a one-dimensional barcode format given a single row of an image.

@param rowNumber row number from top of the row @param row the black/white pixel data of the row @param hints decode hints @return Result containing encoded string and start/end of barcode @throws NotFoundException if no potential barcode is found @throws ChecksumException if a potential barcode is found but does not pass its checksum @throws FormatException if a potential barcode is found but format is invalid

Implementation

@override
Result decodeRow(
  int rowNumber,
  BitArray row,
  DecodeHint? hints,
) {
  final leftPair = _decodePair(row, false, rowNumber, hints);
  _addOrTally(_possibleLeftPairs, leftPair);
  row.reverse();
  final rightPair = _decodePair(row, true, rowNumber, hints);
  _addOrTally(_possibleRightPairs, rightPair);
  row.reverse();
  for (Pair left in _possibleLeftPairs) {
    if (left.count > 1) {
      for (Pair right in _possibleRightPairs) {
        if (right.count > 1 && _checkChecksum(left, right)) {
          return _constructResult(left, right);
        }
      }
    }
  }
  throw NotFoundException.instance;
}