SubtractCompositeOp  344 Magick++/lib/Magick++/Include.h   using MagickCore::SubtractCompositeOp;
SubtractCompositeOp  250 coders/xcf.c       case GIMP_SUBTRACT_MODE:  return( SubtractCompositeOp );
SubtractCompositeOp  834 magick/option.c     { "Subtract", SubtractCompositeOp, DeprecateOptionFlag, MagickTrue },