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//========================================================================
//
// SplashPath.h
//
//========================================================================
#ifndef SPLASHPATH_H
#define SPLASHPATH_H
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "SplashTypes.h"
//------------------------------------------------------------------------
// SplashPathPoint
//------------------------------------------------------------------------
struct SplashPathPoint {
SplashCoord x, y;
};
//------------------------------------------------------------------------
// SplashPath.flags
//------------------------------------------------------------------------
// first point on each subpath sets this flag
#define splashPathFirst 0x01
// last point on each subpath sets this flag
#define splashPathLast 0x02
// if the subpath is closed, its first and last points must be
// identical, and must set this flag
#define splashPathClosed 0x04
// curve control points set this flag
#define splashPathCurve 0x08
// clockwise arc center points set this flag
#define splashPathArcCW 0x10
//------------------------------------------------------------------------
// SplashPath
//------------------------------------------------------------------------
class SplashPath {
public:
// Create an empty path.
SplashPath();
// Copy a path.
SplashPath *copy() { return new SplashPath(this); }
~SplashPath();
// Append <path> to <this>.
void append(SplashPath *path);
// Start a new subpath.
SplashError moveTo(SplashCoord x, SplashCoord y);
// Add a line segment to the last subpath.
SplashError lineTo(SplashCoord x, SplashCoord y);
// Add a third-order (cubic) Bezier curve segment to the last
// subpath.
SplashError curveTo(SplashCoord x1, SplashCoord y1,
SplashCoord x2, SplashCoord y2,
SplashCoord x3, SplashCoord y3);
// Add a clockwise circular arc with center (xc, yc) and endpoint
// (x1, y1).
SplashError arcCWTo(SplashCoord x1, SplashCoord y1,
SplashCoord xc, SplashCoord yc);
// Close the last subpath, adding a line segment if necessary.
SplashError close();
// Add (<dx>, <dy>) to every point on this path.
void offset(SplashCoord dx, SplashCoord dy);
// Get the current point.
GBool getCurPt(SplashCoord *x, SplashCoord *y);
private:
SplashPath(SplashPath *path);
void grow(int nPts);
GBool noCurrentPoint() { return curSubpath == length; }
GBool onePointSubpath() { return curSubpath == length - 1; }
GBool openSubpath() { return curSubpath < length - 1; }
SplashPathPoint *pts; // array of points
Guchar *flags; // array of flags
int length, size; // length/size of the pts and flags arrays
int curSubpath; // index of first point in last subpath
friend class SplashXPath;
friend class Splash;
};
#endif
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