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/*************************************************************************
** PathClipper.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2019 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef PATHCLIPPER_HPP
#define PATHCLIPPER_HPP
#include <clipper.hpp>
#include <string>
#include <vector>
#include "Bezier.hpp"
#include "GraphicsPath.hpp"
#include "MessageException.hpp"
using ClipperLib::IntPoint;
class PathClipper {
public:
using CurvedPath = GraphicsPath<double>;
public:
void intersect (const CurvedPath &p1, const CurvedPath &p2, CurvedPath &result);
protected:
void flatten (const CurvedPath &gp, ClipperLib::Paths &polygons);
void reconstruct (const ClipperLib::Path &polygon, CurvedPath &path);
void reconstruct (const ClipperLib::Paths &polygons, CurvedPath &path);
static void callback (IntPoint &e1bot, IntPoint &e1top, IntPoint &e2bot, IntPoint &e2top, IntPoint &ip);
private:
std::vector<Bezier> _curves;
int _numLines=0; ///< negative number of straight line segments in path been processed
};
#endif
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