//========================================================================

//

// SplashPath.h

//

//========================================================================

//========================================================================

//

// Modified under the Poppler project - http://poppler.freedesktop.org

//

// All changes made under the Poppler project to this file are licensed

// under GPL version 2 or later

//

// Copyright (C) 2018, 2019, 2021 Albert Astals Cid <aacid@kde.org>

// Copyright (C) 2018 Stefan Brüns <stefan.bruens@rwth-aachen.de>

//

// To see a description of the changes please see the Changelog file that

// came with your tarball or type make ChangeLog if you are building from git

//

//========================================================================

#ifndef SPLASHPATH_H

#define SPLASHPATH_H

#include "SplashTypes.h"

#include "poppler_private_export.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

//------------------------------------------------------------------------

// SplashPathHint

//------------------------------------------------------------------------

struct SplashPathHint

{

    int ctrl0, ctrl1;

    int firstPt, lastPt;

};

//------------------------------------------------------------------------

// SplashPath

//------------------------------------------------------------------------

class POPPLER_PRIVATE_EXPORT SplashPath

{

public:

    // Create an empty path.

    SplashPath();

    ~SplashPath();

    SplashPath(const SplashPath &) = delete;

    SplashPath &operator=(const SplashPath &) = delete;

    SplashPath(SplashPath &&path) noexcept;

    // 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);

    // Close the last subpath, adding a line segment if necessary.  If

    // <force> is true, this adds a line segment even if the current

    // point is equal to the first point in the subpath.

    SplashError close(bool force = false);

    // Add a stroke adjustment hint.  The controlling segments are

    // <ctrl0> and <ctrl1> (where segments are identified by their first

    // point), and the points to be adjusted are <firstPt> .. <lastPt>.

    void addStrokeAdjustHint(int ctrl0, int ctrl1, int firstPt, int lastPt);

    // Add (<dx>, <dy>) to every point on this path.

    void offset(SplashCoord dx, SplashCoord dy);

    // Get the points on the path.

    int getLength() { return length; }

    void getPoint(int i, double *x, double *y, unsigned char *f)

    {

        *x = pts[i].x;

        *y = pts[i].y;

        *f = flags[i];

    }

    // Get the current point.

    bool getCurPt(SplashCoord *x, SplashCoord *y);

    // Reserve space for at least n points

    void reserve(int n);

protected:

    void grow(int nPts);

    bool noCurrentPoint() { return curSubpath == length; }

    bool onePointSubpath() { return curSubpath == length - 1; }

    bool openSubpath() { return curSubpath < length - 1; }

    SplashPathPoint *pts; // array of points

    unsigned char *flags; // array of flags

    int length, size; // length/size of the pts and flags arrays

    int curSubpath; // index of first point in last subpath

    SplashPathHint *hints; // list of hints

    int hintsLength, hintsSize;

    friend class SplashXPath;

    friend class Splash;

};

#endif