Example #1
0
  @Override
  public BitMatrix encode(
      String contents, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints) {

    if (contents.isEmpty()) {
      throw new IllegalArgumentException("Found empty contents");
    }

    if (format != BarcodeFormat.DATA_MATRIX) {
      throw new IllegalArgumentException("Can only encode DATA_MATRIX, but got " + format);
    }

    if (width < 0 || height < 0) {
      throw new IllegalArgumentException(
          "Requested dimensions are too small: " + width + 'x' + height);
    }

    // Try to get force shape & min / max size
    SymbolShapeHint shape = SymbolShapeHint.FORCE_NONE;
    Dimension minSize = null;
    Dimension maxSize = null;
    if (hints != null) {
      SymbolShapeHint requestedShape =
          (SymbolShapeHint) hints.get(EncodeHintType.DATA_MATRIX_SHAPE);
      if (requestedShape != null) {
        shape = requestedShape;
      }
      @SuppressWarnings("deprecation")
      Dimension requestedMinSize = (Dimension) hints.get(EncodeHintType.MIN_SIZE);
      if (requestedMinSize != null) {
        minSize = requestedMinSize;
      }
      @SuppressWarnings("deprecation")
      Dimension requestedMaxSize = (Dimension) hints.get(EncodeHintType.MAX_SIZE);
      if (requestedMaxSize != null) {
        maxSize = requestedMaxSize;
      }
    }

    // 1. step: Data encodation
    String encoded = HighLevelEncoder.encodeHighLevel(contents, shape, minSize, maxSize);

    SymbolInfo symbolInfo = SymbolInfo.lookup(encoded.length(), shape, minSize, maxSize, true);

    // 2. step: ECC generation
    String codewords = ErrorCorrection.encodeECC200(encoded, symbolInfo);

    // 3. step: Module placement in Matrix
    DefaultPlacement placement =
        new DefaultPlacement(
            codewords, symbolInfo.getSymbolDataWidth(), symbolInfo.getSymbolDataHeight());
    placement.place();

    // 4. step: low-level encoding
    return encodeLowLevel(placement, symbolInfo);
  }
Example #2
0
  /**
   * Encode the given symbol info to a bit matrix.
   *
   * @param placement The DataMatrix placement.
   * @param symbolInfo The symbol info to encode.
   * @return The bit matrix generated.
   */
  private static BitMatrix encodeLowLevel(DefaultPlacement placement, SymbolInfo symbolInfo) {
    int symbolWidth = symbolInfo.getSymbolDataWidth();
    int symbolHeight = symbolInfo.getSymbolDataHeight();

    ByteMatrix matrix = new ByteMatrix(symbolInfo.getSymbolWidth(), symbolInfo.getSymbolHeight());

    int matrixY = 0;

    for (int y = 0; y < symbolHeight; y++) {
      // Fill the top edge with alternate 0 / 1
      int matrixX;
      if ((y % symbolInfo.matrixHeight) == 0) {
        matrixX = 0;
        for (int x = 0; x < symbolInfo.getSymbolWidth(); x++) {
          matrix.set(matrixX, matrixY, (x % 2) == 0);
          matrixX++;
        }
        matrixY++;
      }
      matrixX = 0;
      for (int x = 0; x < symbolWidth; x++) {
        // Fill the right edge with full 1
        if ((x % symbolInfo.matrixWidth) == 0) {
          matrix.set(matrixX, matrixY, true);
          matrixX++;
        }
        matrix.set(matrixX, matrixY, placement.getBit(x, y));
        matrixX++;
        // Fill the right edge with alternate 0 / 1
        if ((x % symbolInfo.matrixWidth) == symbolInfo.matrixWidth - 1) {
          matrix.set(matrixX, matrixY, (y % 2) == 0);
          matrixX++;
        }
      }
      matrixY++;
      // Fill the bottom edge with full 1
      if ((y % symbolInfo.matrixHeight) == symbolInfo.matrixHeight - 1) {
        matrixX = 0;
        for (int x = 0; x < symbolInfo.getSymbolWidth(); x++) {
          matrix.set(matrixX, matrixY, true);
          matrixX++;
        }
        matrixY++;
      }
    }

    return convertByteMatrixToBitMatrix(matrix);
  }