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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 <gerbolyze.hpp>
+#include <clipper.hpp>
+#include <svg_import_defs.h>
+#include <svg_geom.h>
+#include "polylinecombine.hpp"
+
+using namespace gerbolyze;
+using namespace std;
+
+void Dilater::header(d2p origin, d2p size) {
+ m_sink.header(origin, size);
+}
+
+void Dilater::footer() {
+ m_sink.footer();
+}
+
+Dilater &Dilater::operator<<(const LayerNameToken &layer_name) {
+ m_sink << layer_name;
+
+ return *this;
+}
+
+Dilater &Dilater::operator<<(GerberPolarityToken pol) {
+ m_current_polarity = pol;
+ m_sink << pol;
+
+ return *this;
+}
+
+Dilater &Dilater::operator<<(const Polygon &poly) {
+ static int i = 0;
+ cerr << "dilating poly " << i++ << endl;
+
+ cerr << "got poly of " << poly.size() << " nodes" << endl;
+ ClipperLib::Path poly_c;
+ for (auto &p : poly) {
+ poly_c.push_back({(ClipperLib::cInt)round(p[0] * clipper_scale), (ClipperLib::cInt)round(p[1] * clipper_scale)});
+ }
+
+ ClipperLib::ClipperOffset offx;
+ offx.ArcTolerance = 0.01 * clipper_scale; /* 10µm; TODO: Make this configurable */
+ offx.AddPath(poly_c, ClipperLib::jtRound, ClipperLib::etClosedPolygon);
+ double dilation = m_dilation;
+ if (m_current_polarity == GRB_POL_CLEAR) {
+ dilation = -dilation;
+ }
+
+ ClipperLib::PolyTree solution;
+ offx.Execute(solution, dilation * clipper_scale);
+
+ ClipperLib::Paths c_nice_polys;
+ dehole_polytree(solution, c_nice_polys);
+
+ for (auto &nice_poly : c_nice_polys) {
+ Polygon new_poly;
+ for (auto &p : nice_poly) {
+ new_poly.push_back({
+ (double)p.X / clipper_scale,
+ (double)p.Y / clipper_scale });
+ }
+ m_sink << new_poly;
+ }
+
+ return *this;
+}
+