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 memload(Memimage *dst, Rectangle r, uchar *data, int n, int iscompressed)
 9 324891a5 2006-06-25 devnull {
10 324891a5 2006-06-25 devnull 	int (*loadfn)(Memimage*, Rectangle, uchar*, int);
11 324891a5 2006-06-25 devnull 	Memimage *tmp;
12 324891a5 2006-06-25 devnull 	Memlayer *dl;
13 324891a5 2006-06-25 devnull 	Rectangle lr;
14 324891a5 2006-06-25 devnull 	int dx;
15 324891a5 2006-06-25 devnull 
16 324891a5 2006-06-25 devnull 	loadfn = loadmemimage;
17 324891a5 2006-06-25 devnull 	if(iscompressed)
18 324891a5 2006-06-25 devnull 		loadfn = cloadmemimage;
19 324891a5 2006-06-25 devnull 
20 324891a5 2006-06-25 devnull     Top:
21 324891a5 2006-06-25 devnull 	dl = dst->layer;
22 324891a5 2006-06-25 devnull 	if(dl == nil)
23 324891a5 2006-06-25 devnull 		return loadfn(dst, r, data, n);
24 324891a5 2006-06-25 devnull 
25 324891a5 2006-06-25 devnull 	/*
26 324891a5 2006-06-25 devnull  	 * Convert to screen coordinates.
27 324891a5 2006-06-25 devnull 	 */
28 324891a5 2006-06-25 devnull 	lr = r;
29 324891a5 2006-06-25 devnull 	r.min.x += dl->delta.x;
30 324891a5 2006-06-25 devnull 	r.min.y += dl->delta.y;
31 324891a5 2006-06-25 devnull 	r.max.x += dl->delta.x;
32 324891a5 2006-06-25 devnull 	r.max.y += dl->delta.y;
33 324891a5 2006-06-25 devnull 	dx = dl->delta.x&(7/dst->depth);
34 324891a5 2006-06-25 devnull 	if(dl->clear && dx==0){
35 324891a5 2006-06-25 devnull 		dst = dl->screen->image;
36 324891a5 2006-06-25 devnull 		goto Top;
37 324891a5 2006-06-25 devnull 	}
38 324891a5 2006-06-25 devnull 
39 324891a5 2006-06-25 devnull 	/*
40 324891a5 2006-06-25 devnull 	 * dst is an obscured layer or data is unaligned
41 324891a5 2006-06-25 devnull 	 */
42 324891a5 2006-06-25 devnull 	if(dl->save && dx==0){
43 324891a5 2006-06-25 devnull 		n = loadfn(dl->save, lr, data, n);
44 324891a5 2006-06-25 devnull 		if(n > 0)
45 324891a5 2006-06-25 devnull 			memlexpose(dst, r);
46 324891a5 2006-06-25 devnull 		return n;
47 324891a5 2006-06-25 devnull 	}
48 324891a5 2006-06-25 devnull 	tmp = allocmemimage(lr, dst->chan);
49 324891a5 2006-06-25 devnull 	if(tmp == nil)
50 324891a5 2006-06-25 devnull 		return -1;
51 324891a5 2006-06-25 devnull 	n = loadfn(tmp, lr, data, n);
52 324891a5 2006-06-25 devnull 	memdraw(dst, lr, tmp, lr.min, nil, lr.min, S);
53 324891a5 2006-06-25 devnull 	freememimage(tmp);
54 324891a5 2006-06-25 devnull 	return n;
55 324891a5 2006-06-25 devnull }