1 55dedf71 2003-09-30 devnull typedef struct Memscreen Memscreen;
 2 55dedf71 2003-09-30 devnull typedef void (*Refreshfn)(Memimage*, Rectangle, void*);
 3 55dedf71 2003-09-30 devnull 
 4 55dedf71 2003-09-30 devnull struct Memscreen
 5 55dedf71 2003-09-30 devnull {
 6 55dedf71 2003-09-30 devnull 	Memimage	*frontmost;	/* frontmost layer on screen */
 7 55dedf71 2003-09-30 devnull 	Memimage	*rearmost;	/* rearmost layer on screen */
 8 55dedf71 2003-09-30 devnull 	Memimage	*image;		/* upon which all layers are drawn */
 9 55dedf71 2003-09-30 devnull 	Memimage	*fill;			/* if non-zero, picture to use when repainting */
10 55dedf71 2003-09-30 devnull };
11 55dedf71 2003-09-30 devnull 
12 55dedf71 2003-09-30 devnull struct Memlayer
13 55dedf71 2003-09-30 devnull {
14 55dedf71 2003-09-30 devnull 	Rectangle		screenr;	/* true position of layer on screen */
15 55dedf71 2003-09-30 devnull 	Point			delta;	/* add delta to go from image coords to screen */
16 55dedf71 2003-09-30 devnull 	Memscreen	*screen;	/* screen this layer belongs to */
17 55dedf71 2003-09-30 devnull 	Memimage	*front;	/* window in front of this one */
18 55dedf71 2003-09-30 devnull 	Memimage	*rear;	/* window behind this one*/
19 55dedf71 2003-09-30 devnull 	int		clear;	/* layer is fully visible */
20 55dedf71 2003-09-30 devnull 	Memimage	*save;	/* save area for obscured parts */
21 55dedf71 2003-09-30 devnull 	Refreshfn	refreshfn;		/* function to call to refresh obscured parts if save==nil */
22 55dedf71 2003-09-30 devnull 	void		*refreshptr;	/* argument to refreshfn */
23 55dedf71 2003-09-30 devnull };
24 55dedf71 2003-09-30 devnull 
25 55dedf71 2003-09-30 devnull /*
26 55dedf71 2003-09-30 devnull  * These functions accept local coordinates
27 55dedf71 2003-09-30 devnull  */
28 55dedf71 2003-09-30 devnull int			memload(Memimage*, Rectangle, uchar*, int, int);
29 55dedf71 2003-09-30 devnull int			memunload(Memimage*, Rectangle, uchar*, int);
30 55dedf71 2003-09-30 devnull 
31 55dedf71 2003-09-30 devnull /*
32 55dedf71 2003-09-30 devnull  * All these functions accept screen coordinates, not local ones.
33 55dedf71 2003-09-30 devnull  */
34 55dedf71 2003-09-30 devnull void			_memlayerop(void (*fn)(Memimage*, Rectangle, Rectangle, void*, int), Memimage*, Rectangle, Rectangle, void*);
35 55dedf71 2003-09-30 devnull Memimage*	memlalloc(Memscreen*, Rectangle, Refreshfn, void*, u32int);
36 55dedf71 2003-09-30 devnull void			memldelete(Memimage*);
37 55dedf71 2003-09-30 devnull void			memlfree(Memimage*);
38 55dedf71 2003-09-30 devnull void			memltofront(Memimage*);
39 55dedf71 2003-09-30 devnull void			memltofrontn(Memimage**, int);
40 55dedf71 2003-09-30 devnull void			_memltofrontfill(Memimage*, int);
41 55dedf71 2003-09-30 devnull void			memltorear(Memimage*);
42 55dedf71 2003-09-30 devnull void			memltorearn(Memimage**, int);
43 55dedf71 2003-09-30 devnull int			memlsetrefresh(Memimage*, Refreshfn, void*);
44 55dedf71 2003-09-30 devnull void			memlhide(Memimage*, Rectangle);
45 55dedf71 2003-09-30 devnull void			memlexpose(Memimage*, Rectangle);
46 55dedf71 2003-09-30 devnull void			_memlsetclear(Memscreen*);
47 55dedf71 2003-09-30 devnull int			memlorigin(Memimage*, Point, Point);
48 55dedf71 2003-09-30 devnull void			memlnorefresh(Memimage*, Rectangle, void*);