#ifndef SRAREGION_H

#define SRAREGION_H

/* -=- SRA - Simple Region Algorithm

 * A simple rectangular region implementation.

 * Copyright (c) 2001 James "Wez" Weatherall, Johannes E. Schindelin

 */

/* -=- sraRect */

typedef struct _rect {

	int x1;

	int y1;

	int x2;

	int y2;

} sraRect;

typedef struct sraRegion sraRegion;

/* -=- Region manipulation functions */

extern sraRegion *sraRgnCreate();

extern sraRegion *sraRgnCreateRect(int x1, int y1, int x2, int y2);

extern sraRegion *sraRgnCreateRgn(const sraRegion *src);

extern void sraRgnDestroy(sraRegion *rgn);

extern void sraRgnMakeEmpty(sraRegion *rgn);

extern rfbBool sraRgnAnd(sraRegion *dst, const sraRegion *src);

extern void sraRgnOr(sraRegion *dst, const sraRegion *src);

extern rfbBool sraRgnSubtract(sraRegion *dst, const sraRegion *src);

extern void sraRgnOffset(sraRegion *dst, int dx, int dy);

extern rfbBool sraRgnPopRect(sraRegion *region, sraRect *rect,

			  unsigned long flags);

extern unsigned long sraRgnCountRects(const sraRegion *rgn);

extern rfbBool sraRgnEmpty(const sraRegion *rgn);

extern sraRegion *sraRgnBBox(const sraRegion *src);

/* -=- rectangle iterator */

typedef struct sraRectangleIterator {

  rfbBool reverseX,reverseY;

  int ptrSize,ptrPos;

  struct sraSpan** sPtrs;

} sraRectangleIterator;

extern sraRectangleIterator *sraRgnGetIterator(sraRegion *s);

extern sraRectangleIterator *sraRgnGetReverseIterator(sraRegion *s,rfbBool reverseX,rfbBool reverseY);

extern rfbBool sraRgnIteratorNext(sraRectangleIterator *i,sraRect *r);

extern void sraRgnReleaseIterator(sraRectangleIterator *i);

void sraRgnPrint(const sraRegion *s);

/* -=- Rectangle clipper (for speed) */

extern rfbBool sraClipRect(int *x, int *y, int *w, int *h,

			int cx, int cy, int cw, int ch);

extern rfbBool sraClipRect2(int *x, int *y, int *x2, int *y2,

			int cx, int cy, int cx2, int cy2);

#endif