1 76193d7c 2003-09-30 devnull #include <u.h>
 2 76193d7c 2003-09-30 devnull #include <libc.h>
 3 76193d7c 2003-09-30 devnull #include <draw.h>
 4 76193d7c 2003-09-30 devnull #include <memdraw.h>
 5 76193d7c 2003-09-30 devnull #include <memlayer.h>
 6 76193d7c 2003-09-30 devnull 
 7 76193d7c 2003-09-30 devnull int
 8 76193d7c 2003-09-30 devnull memlsetrefresh(Memimage *i, Refreshfn fn, void *ptr)
 9 76193d7c 2003-09-30 devnull {
10 76193d7c 2003-09-30 devnull 	Memlayer *l;
11 76193d7c 2003-09-30 devnull 
12 76193d7c 2003-09-30 devnull 	l = i->layer;
13 a8763864 2004-07-09 devnull 	if(l->refreshfn!=0 && fn!=0){	/* just change functions */
14 76193d7c 2003-09-30 devnull 		l->refreshfn = fn;
15 76193d7c 2003-09-30 devnull 		l->refreshptr = ptr;
16 76193d7c 2003-09-30 devnull 		return 1;
17 76193d7c 2003-09-30 devnull 	}
18 76193d7c 2003-09-30 devnull 
19 a8763864 2004-07-09 devnull 	if(l->refreshfn == 0){	/* is using backup image; just free it */
20 76193d7c 2003-09-30 devnull 		freememimage(l->save);
21 76193d7c 2003-09-30 devnull 		l->save = nil;
22 76193d7c 2003-09-30 devnull 		l->refreshfn = fn;
23 76193d7c 2003-09-30 devnull 		l->refreshptr = ptr;
24 76193d7c 2003-09-30 devnull 		return 1;
25 76193d7c 2003-09-30 devnull 	}
26 76193d7c 2003-09-30 devnull 
27 76193d7c 2003-09-30 devnull 	l->save = allocmemimage(i->r, i->chan);
28 76193d7c 2003-09-30 devnull 	if(l->save == nil)
29 76193d7c 2003-09-30 devnull 		return 0;
30 76193d7c 2003-09-30 devnull 	/* easiest way is just to update the entire save area */
31 76193d7c 2003-09-30 devnull 	l->refreshfn(i, i->r, l->refreshptr);
32 be22ae2d 2004-03-26 devnull 	l->refreshfn = 0;
33 76193d7c 2003-09-30 devnull 	l->refreshptr = nil;
34 76193d7c 2003-09-30 devnull 	return 1;
35 76193d7c 2003-09-30 devnull }