SubtractCompositeOp  211 Magick++/lib/Magick++/Include.h   using MagickCore::SubtractCompositeOp;
SubtractCompositeOp  245 coders/xcf.c       case GIMP_SUBTRACT_MODE:  return( SubtractCompositeOp );
SubtractCompositeOp  776 magick/option.c     { "Subtract", (ssize_t) SubtractCompositeOp, MagickTrue }, /* deprecate */