/*# proc: nandbinimage - logically NANDs two binary bitmaps together, returning# proc:                the results in a new image.*/#include <stdio.h>/***************************************************************/nandbinimage(xdata, rdata, fdata, iw, ih)unsigned char **xdata, *rdata, *fdata;int iw, ih;{   int size, i;   unsigned char *rptr, *fptr,  *xptr;   size = SizeFromDepth(iw, ih, 1);   malloc_uchar(xdata, size, "nandbinimage : xdata");   rptr = rdata;   fptr = fdata;   xptr = (*xdata);   for(i = 0; i < size; i++){      *xptr++ = *fptr++ & ~ *rptr++;   }}