1 324891a5 2006-06-25 devnull #include <u.h>
 2 324891a5 2006-06-25 devnull #include <libc.h>
 3 324891a5 2006-06-25 devnull #include <draw.h>
 4 324891a5 2006-06-25 devnull #include <memdraw.h>
 5 324891a5 2006-06-25 devnull #include <memlayer.h>
 6 324891a5 2006-06-25 devnull 
 7 324891a5 2006-06-25 devnull int
 8 324891a5 2006-06-25 devnull memlsetrefresh(Memimage *i, Refreshfn fn, void *ptr)
 9 324891a5 2006-06-25 devnull {
10 324891a5 2006-06-25 devnull 	Memlayer *l;
11 324891a5 2006-06-25 devnull 
12 324891a5 2006-06-25 devnull 	l = i->layer;
13 324891a5 2006-06-25 devnull 	if(l->refreshfn!=0 && fn!=0){	/* just change functions */
14 324891a5 2006-06-25 devnull 		l->refreshfn = fn;
15 324891a5 2006-06-25 devnull 		l->refreshptr = ptr;
16 324891a5 2006-06-25 devnull 		return 1;
17 324891a5 2006-06-25 devnull 	}
18 324891a5 2006-06-25 devnull 
19 324891a5 2006-06-25 devnull 	if(l->refreshfn == 0){	/* is using backup image; just free it */
20 324891a5 2006-06-25 devnull 		freememimage(l->save);
21 324891a5 2006-06-25 devnull 		l->save = nil;
22 324891a5 2006-06-25 devnull 		l->refreshfn = fn;
23 324891a5 2006-06-25 devnull 		l->refreshptr = ptr;
24 324891a5 2006-06-25 devnull 		return 1;
25 324891a5 2006-06-25 devnull 	}
26 324891a5 2006-06-25 devnull 
27 324891a5 2006-06-25 devnull 	l->save = allocmemimage(i->r, i->chan);
28 324891a5 2006-06-25 devnull 	if(l->save == nil)
29 324891a5 2006-06-25 devnull 		return 0;
30 324891a5 2006-06-25 devnull 	/* easiest way is just to update the entire save area */
31 324891a5 2006-06-25 devnull 	l->refreshfn(i, i->r, l->refreshptr);
32 324891a5 2006-06-25 devnull 	l->refreshfn = 0;
33 324891a5 2006-06-25 devnull 	l->refreshptr = nil;
34 324891a5 2006-06-25 devnull 	return 1;
35 324891a5 2006-06-25 devnull }