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

Example 71 with BitMatrix

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

the class QRCodeEncoder method encodeAsBitmap.

Bitmap encodeAsBitmap() throws WriterException {
    String contentsToEncode = contents;
    if (contentsToEncode == null) {
        return null;
    }
    Map<EncodeHintType, Object> hints = null;
    String encoding = guessAppropriateEncoding(contentsToEncode);
    if (encoding != null) {
        hints = new EnumMap<>(EncodeHintType.class);
        hints.put(EncodeHintType.CHARACTER_SET, encoding);
    }
    BitMatrix result;
    try {
        result = new MultiFormatWriter().encode(contentsToEncode, format, dimension, dimension, hints);
    } catch (IllegalArgumentException iae) {
        // Unsupported format
        return null;
    }
    int width = result.getWidth();
    int height = result.getHeight();
    int[] pixels = new int[width * height];
    for (int y = 0; y < height; y++) {
        int offset = y * width;
        for (int x = 0; x < width; x++) {
            pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
        }
    }
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
}

Example 72 with BitMatrix

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

the class QRCodeUtil method createQRImage.

/**
     * 生成二维码Bitmap
     *
     * @param content   内容
     * @param widthPix  图片宽度
     * @param heightPix 图片高度
     * @param logoBm    二维码中心的Logo图标（可以为null）
     * @param filePath  用于存储二维码图片的文件路径
     * @return 生成二维码及保存文件是否成功
     */
public static boolean createQRImage(String content, int widthPix, int heightPix, Bitmap logoBm, String filePath) {
    try {
        if (content == null || "".equals(content)) {
            return false;
        }
        //配置参数
        Map<EncodeHintType, Object> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //容错级别
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        //设置空白边距的宽度
        //            hints.put(EncodeHintType.MARGIN, 2); //default is 4
        // 图像数据转换，使用了矩阵转换
        BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, widthPix, heightPix, hints);
        int[] pixels = new int[widthPix * heightPix];
        // 两个for循环是图片横列扫描的结果
        for (int y = 0; y < heightPix; y++) {
            for (int x = 0; x < widthPix; x++) {
                if (bitMatrix.get(x, y)) {
                    pixels[y * widthPix + x] = 0xff000000;
                } else {
                    pixels[y * widthPix + x] = 0xffffffff;
                }
            }
        }
        // 生成二维码图片的格式，使用ARGB_8888
        Bitmap bitmap = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);
        if (logoBm != null) {
            bitmap = addLogo(bitmap, logoBm);
        }
        //必须使用compress方法将bitmap保存到文件中再进行读取。直接返回的bitmap是没有任何压缩的，内存消耗巨大！
        return bitmap != null && bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(filePath));
    } catch (WriterException | IOException e) {
        e.printStackTrace();
    }
    return false;
}

Example 73 with BitMatrix

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

the class DecodeWorker method dumpBlackPoint.

/**
   * Writes out a single PNG which is three times the width of the input image, containing from left
   * to right: the original image, the row sampling monochrome version, and the 2D sampling
   * monochrome version.
   */
private static void dumpBlackPoint(URI uri, BufferedImage image, BinaryBitmap bitmap) throws IOException {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int stride = width * 3;
    int[] pixels = new int[stride * height];
    // The original image
    int[] argb = new int[width];
    for (int y = 0; y < height; y++) {
        image.getRGB(0, y, width, 1, argb, 0, width);
        System.arraycopy(argb, 0, pixels, y * stride, width);
    }
    // Row sampling
    BitArray row = new BitArray(width);
    for (int y = 0; y < height; y++) {
        try {
            row = bitmap.getBlackRow(y, row);
        } catch (NotFoundException nfe) {
            // If fetching the row failed, draw a red line and keep going.
            int offset = y * stride + width;
            Arrays.fill(pixels, offset, offset + width, RED);
            continue;
        }
        int offset = y * stride + width;
        for (int x = 0; x < width; x++) {
            pixels[offset + x] = row.get(x) ? BLACK : WHITE;
        }
    }
    // 2D sampling
    try {
        for (int y = 0; y < height; y++) {
            BitMatrix matrix = bitmap.getBlackMatrix();
            int offset = y * stride + width * 2;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = matrix.get(x, y) ? BLACK : WHITE;
            }
        }
    } catch (NotFoundException ignored) {
    // continue
    }
    writeResultImage(stride, height, pixels, uri, ".mono.png");
}

Example 74 with BitMatrix

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

the class ChartServlet method doEncode.

private static void doEncode(ServletRequest request, HttpServletResponse response, boolean isPost) throws IOException {
    ChartServletRequestParameters parameters;
    try {
        parameters = doParseParameters(request, isPost);
    } catch (IllegalArgumentException | NullPointerException e) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST, e.toString());
        return;
    }
    Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
    hints.put(EncodeHintType.MARGIN, parameters.getMargin());
    if (!StandardCharsets.ISO_8859_1.equals(parameters.getOutputEncoding())) {
        // Only set if not QR code default
        hints.put(EncodeHintType.CHARACTER_SET, parameters.getOutputEncoding().name());
    }
    hints.put(EncodeHintType.ERROR_CORRECTION, parameters.getEcLevel());
    BitMatrix matrix;
    try {
        matrix = new QRCodeWriter().encode(parameters.getText(), BarcodeFormat.QR_CODE, parameters.getWidth(), parameters.getHeight(), hints);
    } catch (WriterException we) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST, we.toString());
        return;
    }
    ByteArrayOutputStream pngOut = new ByteArrayOutputStream();
    MatrixToImageWriter.writeToStream(matrix, "PNG", pngOut);
    byte[] pngData = pngOut.toByteArray();
    response.setContentType("image/png");
    response.setContentLength(pngData.length);
    response.setHeader("Cache-Control", "public");
    response.getOutputStream().write(pngData);
}

Example 75 with BitMatrix

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

the class DataMatrixWriterTestCase method testDataMatrixTooSmall.

@Test
public void testDataMatrixTooSmall() {
    // The DataMatrix will not fit in this size, so the matrix should come back bigger
    int tooSmall = 8;
    DataMatrixWriter writer = new DataMatrixWriter();
    BitMatrix matrix = writer.encode("http://www.google.com/", BarcodeFormat.DATA_MATRIX, tooSmall, tooSmall, null);
    assertNotNull(matrix);
    assertTrue(tooSmall < matrix.getWidth());
    assertTrue(tooSmall < matrix.getHeight());
}