1#ifndef SRAREGION_H
2#define SRAREGION_H
3
4/* -=- SRA - Simple Region Algorithm
5 * A simple rectangular region implementation.
6 * Copyright (c) 2001 James "Wez" Weatherall, Johannes E. Schindelin
7 */
8
9/* -=- sraRect */
10
11typedef struct _rect {
12	int x1;
13	int y1;
14	int x2;
15	int y2;
16} sraRect;
17
18typedef struct sraRegion sraRegion;
19
20/* -=- Region manipulation functions */
21
22extern sraRegion *sraRgnCreate();
23extern sraRegion *sraRgnCreateRect(int x1, int y1, int x2, int y2);
24extern sraRegion *sraRgnCreateRgn(const sraRegion *src);
25
26extern void sraRgnDestroy(sraRegion *rgn);
27extern void sraRgnMakeEmpty(sraRegion *rgn);
28extern rfbBool sraRgnAnd(sraRegion *dst, const sraRegion *src);
29extern void sraRgnOr(sraRegion *dst, const sraRegion *src);
30extern rfbBool sraRgnSubtract(sraRegion *dst, const sraRegion *src);
31
32extern void sraRgnOffset(sraRegion *dst, int dx, int dy);
33
34extern rfbBool sraRgnPopRect(sraRegion *region, sraRect *rect,
35			  unsigned long flags);
36
37extern unsigned long sraRgnCountRects(const sraRegion *rgn);
38extern rfbBool sraRgnEmpty(const sraRegion *rgn);
39
40extern sraRegion *sraRgnBBox(const sraRegion *src);
41
42/* -=- rectangle iterator */
43
44typedef struct sraRectangleIterator {
45  rfbBool reverseX,reverseY;
46  int ptrSize,ptrPos;
47  struct sraSpan** sPtrs;
48} sraRectangleIterator;
49
50extern sraRectangleIterator *sraRgnGetIterator(sraRegion *s);
51extern sraRectangleIterator *sraRgnGetReverseIterator(sraRegion *s,rfbBool reverseX,rfbBool reverseY);
52extern rfbBool sraRgnIteratorNext(sraRectangleIterator *i,sraRect *r);
53extern void sraRgnReleaseIterator(sraRectangleIterator *i);
54
55void sraRgnPrint(const sraRegion *s);
56
57/* -=- Rectangle clipper (for speed) */
58
59extern rfbBool sraClipRect(int *x, int *y, int *w, int *h,
60			int cx, int cy, int cw, int ch);
61
62extern rfbBool sraClipRect2(int *x, int *y, int *x2, int *y2,
63			int cx, int cy, int cx2, int cy2);
64
65#endif
66