/sys/src/libmemdraw/draw.c:374,380 - draw.c:374,380
  	uchar	*alpha;	/* is &ones when unused, never nil */
  	uchar	*grey;
  	ulong	*rgba;
- 	int	delta;	/* number of bytes to add to pointer to get next pixel to the right */
+ 	uintptr	delta;	/* number of bytes to add to pointer to get next pixel to the right */
  
  	/* used by boolcalc* for mask data */
  	uchar	*m;		/* ptr to mask data r.min byte; like p->bytermin */
/sys/src/libmemdraw/draw.c:1068,1073 - draw.c:1068,1078
  	int fd;
  	int i, ma;
  	ulong t;
+ 	
+ 	uintptr sd;
+ 	uintptr dd;
+ 	sd = bsrc.delta;
+ 	dd = bdst.delta;
  
  	USED(op);
  	obdst = bdst;
/sys/src/libmemdraw/draw.c:1084,1095 - draw.c:1089,1100
  			*bdst.red = CALC12(ma, *bsrc.red, fd, *bdst.red, t);
  			*bdst.grn = CALC12(ma, *bsrc.grn, fd, *bdst.grn, t);
  			*bdst.blu = CALC12(ma, *bsrc.blu, fd, *bdst.blu, t);
- 			bsrc.red += bsrc.delta;
- 			bsrc.blu += bsrc.delta;
- 			bsrc.grn += bsrc.delta;
- 			bdst.red += bdst.delta;
- 			bdst.blu += bdst.delta;
- 			bdst.grn += bdst.delta;
+ 			bsrc.red += sd;
+ 			bsrc.blu += sd;
+ 			bsrc.grn += sd;
+ 			bdst.red += dd;
+ 			bdst.blu += dd;
+ 			bdst.grn += dd;
  		}
  		if(bdst.alpha != &ones){
  			*bdst.alpha = ma+CALC11(fd, *bdst.alpha, t);