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/*
* This file is part of gerbolyze, a vector image preprocessing toolchain
* Copyright (C) 2021 Jan Sebastian Götte <gerbolyze@jaseg.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <cmath>
#include <algorithm>
#include <string>
#include <iostream>
#include <iomanip>
#include <clipper.hpp>
#include <gerbolyze.hpp>
#include <svg_import_defs.h>
#include <svg_geom.h>
using namespace gerbolyze;
using namespace std;
namespace gerbolyze {
class Flattener_D {
public:
ClipperLib::Clipper c;
};
}
Flattener::Flattener(PolygonSink &sink) : m_sink(sink) {
d = new Flattener_D();
d->c.StrictlySimple(true);
}
Flattener::~Flattener() {
delete d;
}
void Flattener::header(d2p origin, d2p size) {
m_sink.header(origin, size);
}
Flattener &Flattener::operator<<(GerberPolarityToken pol) {
if (m_current_polarity != pol) {
m_current_polarity = pol;
}
return *this;
}
Flattener &Flattener::operator<<(const Polygon &poly) {
ClipperLib::Path le_path;
for (auto &p : poly) {
le_path.push_back({(ClipperLib::cInt)round(p[0] * clipper_scale), (ClipperLib::cInt)round(p[1] * clipper_scale)});
}
ClipperLib::Paths out;
if (m_current_polarity == GRB_POL_DARK) {
d->c.AddPath(le_path, ClipperLib::ptSubject, true);
d->c.Execute(ClipperLib::ctUnion, out, ClipperLib::pftNonZero);
} else { /* clear */
d->c.AddPath(le_path, ClipperLib::ptClip, true);
d->c.Execute(ClipperLib::ctDifference, out, ClipperLib::pftNonZero);
}
d->c.Clear();
d->c.AddPaths(out, ClipperLib::ptSubject, true);
return *this;
}
void Flattener::footer() {
ClipperLib::PolyTree t_out;
d->c.Execute(ClipperLib::ctDifference, t_out, ClipperLib::pftNonZero);
d->c.Clear();
m_sink << GRB_POL_DARK;
ClipperLib::Paths out;
cerr << "deholing" << endl;
dehole_polytree(t_out, out);
for (auto &poly : out) {
Polygon poly_out;
for (auto &p : poly) {
poly_out.push_back({p.X / clipper_scale, p.Y / clipper_scale});
}
m_sink << poly_out;
}
m_sink.footer();
}
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