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 /*
 8 324891a5 2006-06-25 devnull  * Hide puts that portion of screenr now on the screen into the window's save area.
 9 324891a5 2006-06-25 devnull  * Expose puts that portion of screenr now in the save area onto the screen.
10 324891a5 2006-06-25 devnull  *
11 324891a5 2006-06-25 devnull  * Hide and Expose both require that the layer structures in the screen
12 324891a5 2006-06-25 devnull  * match the geometry they are being asked to update, that is, they update the
13 324891a5 2006-06-25 devnull  * save area (hide) or screen (expose) based on what those structures tell them.
14 324891a5 2006-06-25 devnull  * This means they must be called at the correct time during window shuffles.
15 324891a5 2006-06-25 devnull  */
16 324891a5 2006-06-25 devnull 
17 324891a5 2006-06-25 devnull static
18 324891a5 2006-06-25 devnull void
19 324891a5 2006-06-25 devnull lhideop(Memimage *src, Rectangle screenr, Rectangle clipr, void *etc, int insave)
20 324891a5 2006-06-25 devnull {
21 324891a5 2006-06-25 devnull 	Rectangle r;
22 324891a5 2006-06-25 devnull 	Memlayer *l;
23 324891a5 2006-06-25 devnull 
24 324891a5 2006-06-25 devnull 	USED(clipr.min.x);
25 324891a5 2006-06-25 devnull 	USED(insave);
26 324891a5 2006-06-25 devnull 	l = etc;
27 324891a5 2006-06-25 devnull 	if(src != l->save){	/* do nothing if src is already in save area */
28 324891a5 2006-06-25 devnull 		r = rectsubpt(screenr, l->delta);
29 324891a5 2006-06-25 devnull 		memdraw(l->save, r, src, screenr.min, nil, screenr.min, S);
30 324891a5 2006-06-25 devnull 	}
31 324891a5 2006-06-25 devnull }
32 324891a5 2006-06-25 devnull 
33 324891a5 2006-06-25 devnull void
34 324891a5 2006-06-25 devnull memlhide(Memimage *i, Rectangle screenr)
35 324891a5 2006-06-25 devnull {
36 324891a5 2006-06-25 devnull 	if(i->layer->save == nil)
37 324891a5 2006-06-25 devnull 		return;
38 324891a5 2006-06-25 devnull 	if(rectclip(&screenr, i->layer->screen->image->r) == 0)
39 324891a5 2006-06-25 devnull 		return;
40 324891a5 2006-06-25 devnull 	_memlayerop(lhideop, i, screenr, screenr, i->layer);
41 324891a5 2006-06-25 devnull }
42 324891a5 2006-06-25 devnull 
43 324891a5 2006-06-25 devnull static
44 324891a5 2006-06-25 devnull void
45 324891a5 2006-06-25 devnull lexposeop(Memimage *dst, Rectangle screenr, Rectangle clipr, void *etc, int insave)
46 324891a5 2006-06-25 devnull {
47 324891a5 2006-06-25 devnull 	Memlayer *l;
48 324891a5 2006-06-25 devnull 	Rectangle r;
49 324891a5 2006-06-25 devnull 
50 324891a5 2006-06-25 devnull 	USED(clipr.min.x);
51 324891a5 2006-06-25 devnull 	if(insave)	/* if dst is save area, don't bother */
52 324891a5 2006-06-25 devnull 		return;
53 324891a5 2006-06-25 devnull 	l = etc;
54 324891a5 2006-06-25 devnull 	r = rectsubpt(screenr, l->delta);
55 324891a5 2006-06-25 devnull 	if(l->save)
56 324891a5 2006-06-25 devnull 		memdraw(dst, screenr, l->save, r.min, nil, r.min, S);
57 324891a5 2006-06-25 devnull 	else
58 324891a5 2006-06-25 devnull 		l->refreshfn(dst, r, l->refreshptr);
59 324891a5 2006-06-25 devnull }
60 324891a5 2006-06-25 devnull 
61 324891a5 2006-06-25 devnull void
62 324891a5 2006-06-25 devnull memlexpose(Memimage *i, Rectangle screenr)
63 324891a5 2006-06-25 devnull {
64 324891a5 2006-06-25 devnull 	if(rectclip(&screenr, i->layer->screen->image->r) == 0)
65 324891a5 2006-06-25 devnull 		return;
66 324891a5 2006-06-25 devnull 	_memlayerop(lexposeop, i, screenr, screenr, i->layer);
67 324891a5 2006-06-25 devnull }