// Embed "dataBits" using "getMaskPattern". On success, modify the matrix // and return true. // For debugging purposes, it skips masking process if "getMaskPattern" is // -1. // See 8.7 of JISX0510:2004 (p.38) for how to embed data bits. static void embedDataBits(BitArray dataBits, int maskPattern, ByteMatrix matrix) throws WriterException { int bitIndex = 0; int direction = -1; // Start from the right bottom cell. int x = matrix.getWidth() - 1; int y = matrix.getHeight() - 1; while (x > 0) { // Skip the vertical timing pattern. if (x == 6) { x -= 1; } while (y >= 0 && y < matrix.getHeight()) { for (int i = 0; i < 2; ++i) { int xx = x - i; // Skip the cell if it's not empty. if (!isEmpty(matrix.get(xx, y))) { continue; } boolean bit; if (bitIndex < dataBits.getSize()) { bit = dataBits.get(bitIndex); ++bitIndex; } else { // Padding bit. If there is no bit left, we'll fill the // left cells with 0, // as described // in 8.4.9 of JISX0510:2004 (p. 24). bit = false; } // Skip masking if mask_pattern is -1. if (maskPattern != -1) { if (MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit; } } matrix.set(xx, y, bit); } y += direction; } direction = -direction; // Reverse the direction. y += direction; x -= 2; // Move to the left. } // All bits should be consumed. if (bitIndex != dataBits.getSize()) { throw new WriterException("Not all bits consumed: " + bitIndex + '/' + dataBits.getSize()); } }
static void embedDataBits(BitArray dataBits, int maskPattern, ByteMatrix matrix) throws WriterException { int bitIndex = 0; int direction = -1; int x = matrix.getWidth() - 1; int y = matrix.getHeight() - 1; while (x > 0) { if (x == 6) { x -= 1; } while (y >= 0 && y < matrix.getHeight()) { for (int i = 0; i < 2; ++i) { int xx = x - i; if (!isEmpty(matrix.get(xx, y))) { continue; } boolean bit; if (bitIndex < dataBits.getSize()) { bit = dataBits.get(bitIndex); ++bitIndex; } else { bit = false; } if (maskPattern != -1) { if (MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit; } } matrix.set(xx, y, bit); } y += direction; } direction = -direction; y += direction; x -= 2; } if (bitIndex != dataBits.getSize()) { throw new WriterException("Not all bits consumed: " + bitIndex + '/' + dataBits.getSize()); } }