DUMP_BITS
DUMP_BITS((stderr, "red "), fPlaneBuffers[0], fPlaneBufferSize);
DUMP_BITS((stderr, "green "), fPlaneBuffers[1], fPlaneBufferSize);
DUMP_BITS((stderr, "blue "), fPlaneBuffers[2], fPlaneBufferSize);
DUMP_BITS((stderr, "merged\n"), fCurrentLine, fOutRowSize);