4 /* -=- SRA - Simple Region Algorithm
5 * A simple rectangular region implementation.
6 * Copyright (c) 2001 James "Wez" Weatherall, Johannes E. Schindelin
11 typedef struct _rect {
18 typedef struct sraRegion sraRegion;
20 /* -=- Region manipulation functions */
22 extern sraRegion *sraRgnCreate();
23 extern sraRegion *sraRgnCreateRect(int x1, int y1, int x2, int y2);
24 extern sraRegion *sraRgnCreateRgn(const sraRegion *src);
26 extern void sraRgnDestroy(sraRegion *rgn);
27 extern void sraRgnMakeEmpty(sraRegion *rgn);
28 extern rfbBool sraRgnAnd(sraRegion *dst, const sraRegion *src);
29 extern void sraRgnOr(sraRegion *dst, const sraRegion *src);
30 extern rfbBool sraRgnSubtract(sraRegion *dst, const sraRegion *src);
32 extern void sraRgnOffset(sraRegion *dst, int dx, int dy);
34 extern rfbBool sraRgnPopRect(sraRegion *region, sraRect *rect,
37 extern unsigned long sraRgnCountRects(const sraRegion *rgn);
38 extern rfbBool sraRgnEmpty(const sraRegion *rgn);
40 extern sraRegion *sraRgnBBox(const sraRegion *src);
42 /* -=- rectangle iterator */
44 typedef struct sraRectangleIterator {
45 rfbBool reverseX,reverseY;
47 struct sraSpan** sPtrs;
48 } sraRectangleIterator;
50 extern sraRectangleIterator *sraRgnGetIterator(sraRegion *s);
51 extern sraRectangleIterator *sraRgnGetReverseIterator(sraRegion *s,rfbBool reverseX,rfbBool reverseY);
52 extern rfbBool sraRgnIteratorNext(sraRectangleIterator *i,sraRect *r);
53 extern void sraRgnReleaseIterator(sraRectangleIterator *i);
55 void sraRgnPrint(const sraRegion *s);
57 /* -=- Rectangle clipper (for speed) */
59 extern rfbBool sraClipRect(int *x, int *y, int *w, int *h,
60 int cx, int cy, int cw, int ch);
62 extern rfbBool sraClipRect2(int *x, int *y, int *x2, int *y2,
63 int cx, int cy, int cx2, int cy2);