GRAYSCALE         125 rdrle.c            source->visual     = GRAYSCALE;
GRAYSCALE         145 rdrle.c          if (source->visual == GRAYSCALE || source->visual == MAPPEDGRAY) {
GRAYSCALE         157 rdrle.c          if (source->visual != GRAYSCALE) {
GRAYSCALE         272 rdrle.c          case GRAYSCALE: