bmf_invert         97 dev/ic/sti.c   	bmf_clear, bmf_copy, bmf_invert, bmf_underline
bmf_invert        728 dev/ic/sti.c   	case bmf_invert:
bmf_invert        952 dev/ic/sti.c   	    fp->height, fp->width, bmf_invert);