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 memunload(Memimage *src, Rectangle r, uchar *data, int n)
 9 76193d7c 2003-09-30 devnull {
10 76193d7c 2003-09-30 devnull 	Memimage *tmp;
11 76193d7c 2003-09-30 devnull 	Memlayer *dl;
12 76193d7c 2003-09-30 devnull 	Rectangle lr;
13 76193d7c 2003-09-30 devnull 	int dx;
14 76193d7c 2003-09-30 devnull 
15 76193d7c 2003-09-30 devnull     Top:
16 76193d7c 2003-09-30 devnull 	dl = src->layer;
17 76193d7c 2003-09-30 devnull 	if(dl == nil)
18 76193d7c 2003-09-30 devnull 		return unloadmemimage(src, r, data, n);
19 76193d7c 2003-09-30 devnull 
20 76193d7c 2003-09-30 devnull 	/*
21 76193d7c 2003-09-30 devnull  	 * Convert to screen coordinates.
22 76193d7c 2003-09-30 devnull 	 */
23 76193d7c 2003-09-30 devnull 	lr = r;
24 76193d7c 2003-09-30 devnull 	r.min.x += dl->delta.x;
25 76193d7c 2003-09-30 devnull 	r.min.y += dl->delta.y;
26 76193d7c 2003-09-30 devnull 	r.max.x += dl->delta.x;
27 76193d7c 2003-09-30 devnull 	r.max.y += dl->delta.y;
28 76193d7c 2003-09-30 devnull 	dx = dl->delta.x&(7/src->depth);
29 76193d7c 2003-09-30 devnull 	if(dl->clear && dx==0){
30 76193d7c 2003-09-30 devnull 		src = dl->screen->image;
31 76193d7c 2003-09-30 devnull 		goto Top;
32 76193d7c 2003-09-30 devnull 	}
33 76193d7c 2003-09-30 devnull 
34 76193d7c 2003-09-30 devnull 	/*
35 76193d7c 2003-09-30 devnull 	 * src is an obscured layer or data is unaligned
36 76193d7c 2003-09-30 devnull 	 */
37 76193d7c 2003-09-30 devnull 	if(dl->save && dx==0){
38 a8763864 2004-07-09 devnull 		if(dl->refreshfn != 0)
39 76193d7c 2003-09-30 devnull 			return -1;	/* can't unload window if it's not Refbackup */
40 76193d7c 2003-09-30 devnull 		if(n > 0)
41 76193d7c 2003-09-30 devnull 			memlhide(src, r);
42 76193d7c 2003-09-30 devnull 		n = unloadmemimage(dl->save, lr, data, n);
43 76193d7c 2003-09-30 devnull 		return n;
44 76193d7c 2003-09-30 devnull 	}
45 76193d7c 2003-09-30 devnull 	tmp = allocmemimage(lr, src->chan);
46 76193d7c 2003-09-30 devnull 	if(tmp == nil)
47 76193d7c 2003-09-30 devnull 		return -1;
48 76193d7c 2003-09-30 devnull 	memdraw(tmp, lr, src, lr.min, nil, lr.min, S);
49 76193d7c 2003-09-30 devnull 	n = unloadmemimage(tmp, lr, data, n);
50 76193d7c 2003-09-30 devnull 	freememimage(tmp);
51 76193d7c 2003-09-30 devnull 	return n;
52 76193d7c 2003-09-30 devnull }