Examples with BitMatrix com.google.zxing.common.BitMatrix used on opensource projects

Example 6 with BitMatrix

use of com.google.zxing.common.BitMatrix in project zxing by zxing.

the class DataMaskTestCase method testMask.

private static void testMask(DataMask mask, int dimension, MaskCondition condition) {
    BitMatrix bits = new BitMatrix(dimension);
    mask.unmaskBitMatrix(bits, dimension);
    for (int i = 0; i < dimension; i++) {
        for (int j = 0; j < dimension; j++) {
            assertEquals("(" + i + ',' + j + ')', condition.isMasked(i, j), bits.get(j, i));
        }
    }
}

Example 7 with BitMatrix

use of com.google.zxing.common.BitMatrix in project zxing by zxing.

the class Detector method detect.

/**
   * Detects an Aztec Code in an image.
   *
   * @param isMirror if true, image is a mirror-image of original
   * @return {@link AztecDetectorResult} encapsulating results of detecting an Aztec Code
   * @throws NotFoundException if no Aztec Code can be found
   */
public AztecDetectorResult detect(boolean isMirror) throws NotFoundException {
    // 1. Get the center of the aztec matrix
    Point pCenter = getMatrixCenter();
    // 2. Get the center points of the four diagonal points just outside the bull's eye
    //  [topRight, bottomRight, bottomLeft, topLeft]
    ResultPoint[] bullsEyeCorners = getBullsEyeCorners(pCenter);
    if (isMirror) {
        ResultPoint temp = bullsEyeCorners[0];
        bullsEyeCorners[0] = bullsEyeCorners[2];
        bullsEyeCorners[2] = temp;
    }
    // 3. Get the size of the matrix and other parameters from the bull's eye
    extractParameters(bullsEyeCorners);
    // 4. Sample the grid
    BitMatrix bits = sampleGrid(image, bullsEyeCorners[shift % 4], bullsEyeCorners[(shift + 1) % 4], bullsEyeCorners[(shift + 2) % 4], bullsEyeCorners[(shift + 3) % 4]);
    // 5. Get the corners of the matrix.
    ResultPoint[] corners = getMatrixCornerPoints(bullsEyeCorners);
    return new AztecDetectorResult(bits, corners, compact, nbDataBlocks, nbLayers);
}

Example 8 with BitMatrix

use of com.google.zxing.common.BitMatrix in project zxing by zxing.

the class Encoder method encode.

/**
   * Encodes the given binary content as an Aztec symbol
   * 
   * @param data input data string
   * @param minECCPercent minimal percentage of error check words (According to ISO/IEC 24778:2008,
   *                      a minimum of 23% + 3 words is recommended)
   * @param userSpecifiedLayers if non-zero, a user-specified value for the number of layers
   * @return Aztec symbol matrix with metadata
   */
public static AztecCode encode(byte[] data, int minECCPercent, int userSpecifiedLayers) {
    // High-level encode
    BitArray bits = new HighLevelEncoder(data).encode();
    // stuff bits and choose symbol size
    int eccBits = bits.getSize() * minECCPercent / 100 + 11;
    int totalSizeBits = bits.getSize() + eccBits;
    boolean compact;
    int layers;
    int totalBitsInLayer;
    int wordSize;
    BitArray stuffedBits;
    if (userSpecifiedLayers != DEFAULT_AZTEC_LAYERS) {
        compact = userSpecifiedLayers < 0;
        layers = Math.abs(userSpecifiedLayers);
        if (layers > (compact ? MAX_NB_BITS_COMPACT : MAX_NB_BITS)) {
            throw new IllegalArgumentException(String.format("Illegal value %s for layers", userSpecifiedLayers));
        }
        totalBitsInLayer = totalBitsInLayer(layers, compact);
        wordSize = WORD_SIZE[layers];
        int usableBitsInLayers = totalBitsInLayer - (totalBitsInLayer % wordSize);
        stuffedBits = stuffBits(bits, wordSize);
        if (stuffedBits.getSize() + eccBits > usableBitsInLayers) {
            throw new IllegalArgumentException("Data to large for user specified layer");
        }
        if (compact && stuffedBits.getSize() > wordSize * 64) {
            // Compact format only allows 64 data words, though C4 can hold more words than that
            throw new IllegalArgumentException("Data to large for user specified layer");
        }
    } else {
        wordSize = 0;
        stuffedBits = null;
        // is the same size, but has more data.
        for (int i = 0; ; i++) {
            if (i > MAX_NB_BITS) {
                throw new IllegalArgumentException("Data too large for an Aztec code");
            }
            compact = i <= 3;
            layers = compact ? i + 1 : i;
            totalBitsInLayer = totalBitsInLayer(layers, compact);
            if (totalSizeBits > totalBitsInLayer) {
                continue;
            }
            // wordSize has changed
            if (wordSize != WORD_SIZE[layers]) {
                wordSize = WORD_SIZE[layers];
                stuffedBits = stuffBits(bits, wordSize);
            }
            int usableBitsInLayers = totalBitsInLayer - (totalBitsInLayer % wordSize);
            if (compact && stuffedBits.getSize() > wordSize * 64) {
                // Compact format only allows 64 data words, though C4 can hold more words than that
                continue;
            }
            if (stuffedBits.getSize() + eccBits <= usableBitsInLayers) {
                break;
            }
        }
    }
    BitArray messageBits = generateCheckWords(stuffedBits, totalBitsInLayer, wordSize);
    // generate mode message
    int messageSizeInWords = stuffedBits.getSize() / wordSize;
    BitArray modeMessage = generateModeMessage(compact, layers, messageSizeInWords);
    // allocate symbol
    // not including alignment lines
    int baseMatrixSize = (compact ? 11 : 14) + layers * 4;
    int[] alignmentMap = new int[baseMatrixSize];
    int matrixSize;
    if (compact) {
        // no alignment marks in compact mode, alignmentMap is a no-op
        matrixSize = baseMatrixSize;
        for (int i = 0; i < alignmentMap.length; i++) {
            alignmentMap[i] = i;
        }
    } else {
        matrixSize = baseMatrixSize + 1 + 2 * ((baseMatrixSize / 2 - 1) / 15);
        int origCenter = baseMatrixSize / 2;
        int center = matrixSize / 2;
        for (int i = 0; i < origCenter; i++) {
            int newOffset = i + i / 15;
            alignmentMap[origCenter - i - 1] = center - newOffset - 1;
            alignmentMap[origCenter + i] = center + newOffset + 1;
        }
    }
    BitMatrix matrix = new BitMatrix(matrixSize);
    // draw data bits
    for (int i = 0, rowOffset = 0; i < layers; i++) {
        int rowSize = (layers - i) * 4 + (compact ? 9 : 12);
        for (int j = 0; j < rowSize; j++) {
            int columnOffset = j * 2;
            for (int k = 0; k < 2; k++) {
                if (messageBits.get(rowOffset + columnOffset + k)) {
                    matrix.set(alignmentMap[i * 2 + k], alignmentMap[i * 2 + j]);
                }
                if (messageBits.get(rowOffset + rowSize * 2 + columnOffset + k)) {
                    matrix.set(alignmentMap[i * 2 + j], alignmentMap[baseMatrixSize - 1 - i * 2 - k]);
                }
                if (messageBits.get(rowOffset + rowSize * 4 + columnOffset + k)) {
                    matrix.set(alignmentMap[baseMatrixSize - 1 - i * 2 - k], alignmentMap[baseMatrixSize - 1 - i * 2 - j]);
                }
                if (messageBits.get(rowOffset + rowSize * 6 + columnOffset + k)) {
                    matrix.set(alignmentMap[baseMatrixSize - 1 - i * 2 - j], alignmentMap[i * 2 + k]);
                }
            }
        }
        rowOffset += rowSize * 8;
    }
    // draw mode message
    drawModeMessage(matrix, compact, matrixSize, modeMessage);
    // draw alignment marks
    if (compact) {
        drawBullsEye(matrix, matrixSize / 2, 5);
    } else {
        drawBullsEye(matrix, matrixSize / 2, 7);
        for (int i = 0, j = 0; i < baseMatrixSize / 2 - 1; i += 15, j += 16) {
            for (int k = (matrixSize / 2) & 1; k < matrixSize; k += 2) {
                matrix.set(matrixSize / 2 - j, k);
                matrix.set(matrixSize / 2 + j, k);
                matrix.set(k, matrixSize / 2 - j);
                matrix.set(k, matrixSize / 2 + j);
            }
        }
    }
    AztecCode aztec = new AztecCode();
    aztec.setCompact(compact);
    aztec.setSize(matrixSize);
    aztec.setLayers(layers);
    aztec.setCodeWords(messageSizeInWords);
    aztec.setMatrix(matrix);
    return aztec;
}

Example 9 with BitMatrix

use of com.google.zxing.common.BitMatrix in project zxing by zxing.

the class AztecWriter method renderResult.

private static BitMatrix renderResult(AztecCode code, int width, int height) {
    BitMatrix input = code.getMatrix();
    if (input == null) {
        throw new IllegalStateException();
    }
    int inputWidth = input.getWidth();
    int inputHeight = input.getHeight();
    int outputWidth = Math.max(width, inputWidth);
    int outputHeight = Math.max(height, inputHeight);
    int multiple = Math.min(outputWidth / inputWidth, outputHeight / inputHeight);
    int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
    int topPadding = (outputHeight - (inputHeight * multiple)) / 2;
    BitMatrix output = new BitMatrix(outputWidth, outputHeight);
    for (int inputY = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
        // Write the contents of this row of the barcode
        for (int inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
            if (input.get(inputX, inputY)) {
                output.setRegion(outputX, outputY, multiple, multiple);
            }
        }
    }
    return output;
}

Example 10 with BitMatrix

use of com.google.zxing.common.BitMatrix in project zxing by zxing.

the class Decoder method decode.

public DecoderResult decode(AztecDetectorResult detectorResult) throws FormatException {
    ddata = detectorResult;
    BitMatrix matrix = detectorResult.getBits();
    boolean[] rawbits = extractBits(matrix);
    boolean[] correctedBits = correctBits(rawbits);
    byte[] rawBytes = convertBoolArrayToByteArray(correctedBits);
    String result = getEncodedData(correctedBits);
    DecoderResult decoderResult = new DecoderResult(rawBytes, result, null, null);
    decoderResult.setNumBits(correctedBits.length);
    return decoderResult;
}