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 memload(Memimage *dst, Rectangle r, uchar *data, int n, int iscompressed)
 9 76193d7c 2003-09-30 devnull {
10 76193d7c 2003-09-30 devnull 	int (*loadfn)(Memimage*, Rectangle, uchar*, int);
11 76193d7c 2003-09-30 devnull 	Memimage *tmp;
12 76193d7c 2003-09-30 devnull 	Memlayer *dl;
13 76193d7c 2003-09-30 devnull 	Rectangle lr;
14 76193d7c 2003-09-30 devnull 	int dx;
15 76193d7c 2003-09-30 devnull 
16 76193d7c 2003-09-30 devnull 	loadfn = loadmemimage;
17 76193d7c 2003-09-30 devnull 	if(iscompressed)
18 76193d7c 2003-09-30 devnull 		loadfn = cloadmemimage;
19 76193d7c 2003-09-30 devnull 
20 76193d7c 2003-09-30 devnull     Top:
21 76193d7c 2003-09-30 devnull 	dl = dst->layer;
22 76193d7c 2003-09-30 devnull 	if(dl == nil)
23 76193d7c 2003-09-30 devnull 		return loadfn(dst, r, data, n);
24 76193d7c 2003-09-30 devnull 
25 76193d7c 2003-09-30 devnull 	/*
26 76193d7c 2003-09-30 devnull  	 * Convert to screen coordinates.
27 76193d7c 2003-09-30 devnull 	 */
28 76193d7c 2003-09-30 devnull 	lr = r;
29 76193d7c 2003-09-30 devnull 	r.min.x += dl->delta.x;
30 76193d7c 2003-09-30 devnull 	r.min.y += dl->delta.y;
31 76193d7c 2003-09-30 devnull 	r.max.x += dl->delta.x;
32 76193d7c 2003-09-30 devnull 	r.max.y += dl->delta.y;
33 76193d7c 2003-09-30 devnull 	dx = dl->delta.x&(7/dst->depth);
34 76193d7c 2003-09-30 devnull 	if(dl->clear && dx==0){
35 76193d7c 2003-09-30 devnull 		dst = dl->screen->image;
36 76193d7c 2003-09-30 devnull 		goto Top;
37 76193d7c 2003-09-30 devnull 	}
38 76193d7c 2003-09-30 devnull 
39 76193d7c 2003-09-30 devnull 	/*
40 76193d7c 2003-09-30 devnull 	 * dst is an obscured layer or data is unaligned
41 76193d7c 2003-09-30 devnull 	 */
42 76193d7c 2003-09-30 devnull 	if(dl->save && dx==0){
43 76193d7c 2003-09-30 devnull 		n = loadfn(dl->save, lr, data, n);
44 76193d7c 2003-09-30 devnull 		if(n > 0)
45 76193d7c 2003-09-30 devnull 			memlexpose(dst, r);
46 76193d7c 2003-09-30 devnull 		return n;
47 76193d7c 2003-09-30 devnull 	}
48 76193d7c 2003-09-30 devnull 	tmp = allocmemimage(lr, dst->chan);
49 76193d7c 2003-09-30 devnull 	if(tmp == nil)
50 76193d7c 2003-09-30 devnull 		return -1;
51 76193d7c 2003-09-30 devnull 	n = loadfn(tmp, lr, data, n);
52 76193d7c 2003-09-30 devnull 	memdraw(dst, lr, tmp, lr.min, nil, lr.min, S);
53 76193d7c 2003-09-30 devnull 	freememimage(tmp);
54 76193d7c 2003-09-30 devnull 	return n;
55 76193d7c 2003-09-30 devnull }