if (maskPattern != -1 && MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit;
if (MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit;
if (maskPattern != -1 && MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit;
if (MaskUtil.getDataMaskBit(maskPattern, xx, y)) { bit = !bit;