encode method

@override BitMatrix encode(String contents, BarcodeFormat format, int width, int height, [ EncodeHint? hints, ])

@param contents The contents to encode in the barcode @param format The barcode format to generate @param width The preferred width in pixels @param height The preferred height in pixels @param hints Additional parameters to supply to the encoder @return BitMatrix representing encoded barcode image @throws WriterException if contents cannot be encoded legally in a format

Implementation

@override
BitMatrix encode(
  String contents,
  BarcodeFormat format,
  int width,
  int height, [
  EncodeHint? hints,
]) {
  if (format != BarcodeFormat.pdf417) {
    throw ArgumentError('Can only encode PDF_417, but got $format');
  }

  final encoder = PDF417();
  int margin = _whiteSpace;
  int errorCorrectionLevel = _defaultErrorCorrectionLevel;
  bool autoECI = false;

  if (hints != null) {
    if (hints.pdf417Compact == true) {
      encoder.setCompact(hints.pdf417Compact);
    }
    if (hints.pdf417Compaction != null) {
      encoder.setCompaction(hints.pdf417Compaction!);
    }
    if (hints.pdf417Dimensions != null) {
      final dimensions = hints.pdf417Dimensions!;
      encoder.setDimensions(
        dimensions.maxCols,
        dimensions.minCols,
        dimensions.maxRows,
        dimensions.minRows,
      );
    }
    if (hints.margin != null) {
      margin = hints.margin!;
    }
    if (hints.errorCorrection != null) {
      errorCorrectionLevel = hints.errorCorrection!;
    }
    if (hints.characterSet != null) {
      final encoding = CharacterSetECI.getCharacterSetECIByName(
        hints.characterSet!,
      )?.charset;
      if (encoding != null) encoder.setEncoding(encoding);
    }
    autoECI = hints.pdf417AutoEci;
  }

  return _bitMatrixFromEncoder(
    encoder,
    contents,
    errorCorrectionLevel,
    width,
    height,
    margin,
    autoECI,
  );
}