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 memunload(Memimage *src, Rectangle r, uchar *data, int n)
 9 324891a5 2006-06-25 devnull {
10 324891a5 2006-06-25 devnull 	Memimage *tmp;
11 324891a5 2006-06-25 devnull 	Memlayer *dl;
12 324891a5 2006-06-25 devnull 	Rectangle lr;
13 324891a5 2006-06-25 devnull 	int dx;
14 324891a5 2006-06-25 devnull 
15 324891a5 2006-06-25 devnull     Top:
16 324891a5 2006-06-25 devnull 	dl = src->layer;
17 324891a5 2006-06-25 devnull 	if(dl == nil)
18 324891a5 2006-06-25 devnull 		return unloadmemimage(src, r, data, n);
19 324891a5 2006-06-25 devnull 
20 324891a5 2006-06-25 devnull 	/*
21 324891a5 2006-06-25 devnull  	 * Convert to screen coordinates.
22 324891a5 2006-06-25 devnull 	 */
23 324891a5 2006-06-25 devnull 	lr = r;
24 324891a5 2006-06-25 devnull 	r.min.x += dl->delta.x;
25 324891a5 2006-06-25 devnull 	r.min.y += dl->delta.y;
26 324891a5 2006-06-25 devnull 	r.max.x += dl->delta.x;
27 324891a5 2006-06-25 devnull 	r.max.y += dl->delta.y;
28 324891a5 2006-06-25 devnull 	dx = dl->delta.x&(7/src->depth);
29 324891a5 2006-06-25 devnull 	if(dl->clear && dx==0){
30 324891a5 2006-06-25 devnull 		src = dl->screen->image;
31 324891a5 2006-06-25 devnull 		goto Top;
32 324891a5 2006-06-25 devnull 	}
33 324891a5 2006-06-25 devnull 
34 324891a5 2006-06-25 devnull 	/*
35 324891a5 2006-06-25 devnull 	 * src is an obscured layer or data is unaligned
36 324891a5 2006-06-25 devnull 	 */
37 324891a5 2006-06-25 devnull 	if(dl->save && dx==0){
38 324891a5 2006-06-25 devnull 		if(dl->refreshfn != 0)
39 324891a5 2006-06-25 devnull 			return -1;	/* can't unload window if it's not Refbackup */
40 324891a5 2006-06-25 devnull 		if(n > 0)
41 324891a5 2006-06-25 devnull 			memlhide(src, r);
42 324891a5 2006-06-25 devnull 		n = unloadmemimage(dl->save, lr, data, n);
43 324891a5 2006-06-25 devnull 		return n;
44 324891a5 2006-06-25 devnull 	}
45 324891a5 2006-06-25 devnull 	tmp = allocmemimage(lr, src->chan);
46 324891a5 2006-06-25 devnull 	if(tmp == nil)
47 324891a5 2006-06-25 devnull 		return -1;
48 324891a5 2006-06-25 devnull 	memdraw(tmp, lr, src, lr.min, nil, lr.min, S);
49 324891a5 2006-06-25 devnull 	n = unloadmemimage(tmp, lr, data, n);
50 324891a5 2006-06-25 devnull 	freememimage(tmp);
51 324891a5 2006-06-25 devnull 	return n;
52 324891a5 2006-06-25 devnull }