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//========================================================================
//
// SplashXPath.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) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2018 Albert Astals Cid <aacid@kde.org>
//
// 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 SPLASHXPATH_H
#define SPLASHXPATH_H
#include "SplashTypes.h"
class SplashPath;
struct SplashXPathAdjust;
//------------------------------------------------------------------------
#define splashMaxCurveSplits (1 << 10)
//------------------------------------------------------------------------
// 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
unsigned int flags;
};
#define splashXPathHoriz 0x01 // segment is vertical (y0 == y1)
// (dxdy is undef)
#define splashXPathVert 0x02 // segment is horizontal (x0 == x1)
// (dydx is undef)
#define splashXPathFlip 0x04 // y0 > y1
//------------------------------------------------------------------------
// SplashXPath
//------------------------------------------------------------------------
class SplashXPath {
public:
// Expands (converts to segments) and flattens (converts curves to
// lines) <path>. Transforms all points from user space to device
// space, via <matrix>. If <closeSubpaths> is true, closes all open
// subpaths.
SplashXPath(SplashPath *path, SplashCoord *matrix,
SplashCoord flatness, bool closeSubpaths,
bool adjustLines = false, int linePosI = 0);
// Copy an expanded path.
SplashXPath *copy() { return new SplashXPath(this); }
~SplashXPath();
SplashXPath(const SplashXPath&) = delete;
SplashXPath& operator=(const SplashXPath&) = delete;
// Multiply all coordinates by splashAASize, in preparation for
// anti-aliased rendering.
void aaScale();
// Sort by upper coordinate (lower y), in y-major order.
void sort();
protected:
SplashXPath(SplashXPath *xPath);
void transform(SplashCoord *matrix, SplashCoord xi, SplashCoord yi,
SplashCoord *xo, SplashCoord *yo);
void strokeAdjust(SplashXPathAdjust *adjust,
SplashCoord *xp, SplashCoord *yp);
void grow(int nSegs);
void addCurve(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1,
SplashCoord x2, SplashCoord y2,
SplashCoord x3, SplashCoord y3,
SplashCoord flatness,
bool first, bool last, bool end0, bool end1);
void addSegment(SplashCoord x0, SplashCoord y0,
SplashCoord x1, SplashCoord y1);
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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