tmemlayer.h - plan9port - [fork] Plan 9 from user space
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tmemlayer.h (1922B)
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1 #ifndef _MEMLAYER_H_
2 #define _MEMLAYER_H_ 1
3 #if defined(__cplusplus)
4 extern "C" {
5 #endif
6
7 typedef struct Memscreen Memscreen;
8 typedef void (*Refreshfn)(Memimage*, Rectangle, void*);
9
10 struct Memscreen
11 {
12 Memimage *frontmost; /* frontmost layer on screen */
13 Memimage *rearmost; /* rearmost layer on screen */
14 Memimage *image; /* upon which all layers are drawn */
15 Memimage *fill; /* if non-zero, picture to use when repainting */
16 };
17
18 struct Memlayer
19 {
20 Rectangle screenr; /* true position of layer on screen */
21 Point delta; /* add delta to go from image coords to screen */
22 Memscreen *screen; /* screen this layer belongs to */
23 Memimage *front; /* window in front of this one */
24 Memimage *rear; /* window behind this one*/
25 int clear; /* layer is fully visible */
26 Memimage *save; /* save area for obscured parts */
27 Refreshfn refreshfn; /* function to call to refresh obscured parts if save==nil */
28 void *refreshptr; /* argument to refreshfn */
29 };
30
31 /*
32 * These functions accept local coordinates
33 */
34 int memload(Memimage*, Rectangle, uchar*, int, int);
35 int memunload(Memimage*, Rectangle, uchar*, int);
36
37 /*
38 * All these functions accept screen coordinates, not local ones.
39 */
40 void _memlayerop(void (*fn)(Memimage*, Rectangle, Rectangle, void*, int), Memimage*, Rectangle, Rectangle, void*);
41 Memimage* memlalloc(Memscreen*, Rectangle, Refreshfn, void*, u32int);
42 void memldelete(Memimage*);
43 void memlfree(Memimage*);
44 void memltofront(Memimage*);
45 void memltofrontn(Memimage**, int);
46 void _memltofrontfill(Memimage*, int);
47 void memltorear(Memimage*);
48 void memltorearn(Memimage**, int);
49 int memlsetrefresh(Memimage*, Refreshfn, void*);
50 void memlhide(Memimage*, Rectangle);
51 void memlexpose(Memimage*, Rectangle);
52 void _memlsetclear(Memscreen*);
53 int memlorigin(Memimage*, Point, Point);
54 void memlnorefresh(Memimage*, Rectangle, void*);
55
56
57 #if defined(__cplusplus)
58 }
59 #endif
60 #endif