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//========================================================================
//
// SplashXPath.h
//
//========================================================================
#ifndef SPLASHXPATH_H
#define SPLASHXPATH_H
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "SplashTypes.h"
class SplashPath;
//------------------------------------------------------------------------
// SplashXPathSeg
//------------------------------------------------------------------------
struct SplashXPathSeg {
SplashCoord x0, y0; // first endpoint
SplashCoord x1, y1; // second endpoint
SplashCoord dxdy; // slope: delta-x / delta-y
SplashCoord dydx; // slope: delta-y / delta-x
Guint flags;
};
#define splashXPathFirst 0x01 // first segment of a subpath
#define splashXPathLast 0x02 // last segment of a subpath
#define splashXPathEnd0 0x04 // first endpoint is end of an open subpath
#define splashXPathEnd1 0x08 // second endpoint is end of an open subpath
#define splashXPathHoriz 0x10 // segment is vertical (y0 == y1)
// (dxdy is undef)
#define splashXPathVert 0x20 // segment is horizontal (x0 == x1)
// (dydx is undef)
#define splashXPathFlip 0x40 // y0 > y1
//------------------------------------------------------------------------
// SplashXPath
//------------------------------------------------------------------------
class SplashXPath {
public:
// Expands (converts to segments) and flattens (converts curves to
// lines) <path>. If <closeSubpaths> is true, closes all open
// subpaths.
SplashXPath(SplashPath *path, SplashCoord flatness,
GBool closeSubpaths);
// Copy an expanded path.
SplashXPath *copy() { return new SplashXPath(this); }
~SplashXPath();
// Sort by upper coordinate (lower y), in y-major order.
void sort();
private:
SplashXPath();
SplashXPath(SplashXPath *xPath);
void grow(int nSegs);
void addCurve(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1,
SplashCoord x2, SplashCoord y2,
SplashCoord x3, SplashCoord y3,
SplashCoord flatness,
GBool first, GBool last, GBool end0, GBool end1);
void addArc(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1,
SplashCoord xc, SplashCoord yc,
SplashCoord r, int quad,
SplashCoord flatness,
GBool first, GBool last, GBool end0, GBool end1);
void addSegment(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1,
GBool first, GBool last, GBool end0, GBool end1);
SplashXPathSeg *segs;
int length, size; // length and size of segs array
friend class SplashXPathScanner;
friend class SplashClip;
friend class Splash;
};
#endif
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