Reorg: move svg-flatten files into subdir

svg-flatten/src/out_flattener.cpp

@@ -0,0 +1,187 @@
+/*
+ * 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 <svg_import_defs.h>
+#include <svg_geom.h>
+#include "polylinecombine.hpp"
+
+using namespace gerbolyze;
+using namespace std;
+
+static void polygon_to_cavc (const Polygon &in, cavc::Polyline<double> &out) {
+    for (auto &p : in) {
+        out.addVertex(p[0], p[1], 0);
+    }
+    out.isClosed() = true; /* sic! */
+}
+
+static void cavc_to_polygon (const cavc::Polyline<double> &in, Polygon &out) {
+    for (auto &p : in.vertexes()) {
+        out.emplace_back(d2p{p.x(), p.y()});
+    }
+}
+
+namespace gerbolyze {
+    class Flattener_D {
+    public:
+        vector<cavc::Polyline<double>> dark_polys;
+        vector<cavc::Polyline<double>> clear_polys;
+
+        void add_dark_polygon(const Polygon &in) {
+            polygon_to_cavc(in, dark_polys.emplace_back());
+        }
+
+        void add_clear_polygon(const Polygon &in) {
+            polygon_to_cavc(in, clear_polys.emplace_back());
+        }
+    };
+}
+
+Flattener::Flattener(PolygonSink &sink) : m_sink(sink) {
+    d = new Flattener_D();
+}
+
+Flattener::~Flattener() {
+    delete d;
+}
+
+void Flattener::header(d2p origin, d2p size) {
+    m_sink.header(origin, size);
+}
+
+void Flattener::render_out_clear_polys() {
+    for (auto &sub : d->clear_polys) {
+        vector<cavc::Polyline<double>> new_dark_polys;
+        new_dark_polys.reserve(d->dark_polys.size());
+
+        for (cavc::Polyline<double> cavc_in : d->dark_polys) {
+            auto res = cavc::combinePolylines(cavc_in, sub, cavc::PlineCombineMode::Exclude);
+
+            if (res.subtracted.size() == 0) {
+                for (auto &rem : res.remaining) {
+                    new_dark_polys.push_back(std::move(rem));
+                }
+
+            } else { /* custom one-hole deholing code */
+                assert (res.remaining.size() == 1);
+                assert (res.subtracted.size() == 1);
+
+                auto &rem = res.remaining[0];
+                auto &sub = res.subtracted[0];
+                auto bbox = getExtents(rem);
+
+                cavc::Polyline<double> quad;
+                quad.addVertex(bbox.xMin, bbox.yMin, 0);
+                if (sub.vertexes()[0].x() < sub.vertexes()[1].x()) {
+                    quad.addVertex(sub.vertexes()[0]);
+                    quad.addVertex(sub.vertexes()[1]);
+                } else {
+                    quad.addVertex(sub.vertexes()[1]);
+                    quad.addVertex(sub.vertexes()[0]);
+                }
+                quad.addVertex(bbox.xMax, bbox.yMin, 0);
+                quad.isClosed() = true; /* sic! */
+
+                auto res2 = cavc::combinePolylines(rem, quad, cavc::PlineCombineMode::Exclude);
+                assert (res2.subtracted.size() == 0);
+
+                for (auto &rem : res2.remaining) {
+                    auto res3 = cavc::combinePolylines(rem, sub, cavc::PlineCombineMode::Exclude);
+                    assert (res3.subtracted.size() == 0);
+                    for (auto &p : res3.remaining) {
+                        new_dark_polys.push_back(std::move(p));
+                    }
+                }
+
+                auto res4 = cavc::combinePolylines(rem, quad, cavc::PlineCombineMode::Intersect);
+                assert (res4.subtracted.size() == 0);
+
+                for (auto &rem : res4.remaining) {
+                    auto res5 = cavc::combinePolylines(rem, sub, cavc::PlineCombineMode::Exclude);
+                    assert (res5.subtracted.size() == 0);
+                    for (auto &p : res5.remaining) {
+                        new_dark_polys.push_back(std::move(p));
+                    }
+                }
+            }
+        }
+
+        d->dark_polys = std::move(new_dark_polys);
+    }
+    d->clear_polys.clear();
+}
+
+Flattener &Flattener::operator<<(GerberPolarityToken pol) {
+    if (m_current_polarity != pol) {
+        m_current_polarity = pol;
+
+        if (pol == GRB_POL_DARK) {
+            render_out_clear_polys();
+        }
+    }
+
+    return *this;
+}
+
+Flattener &Flattener::operator<<(const LayerNameToken &layer_name) {
+    flush_polys_to_sink();
+    m_sink << layer_name;
+    cerr << "Flattener forwarding layer name to sink: \"" << layer_name.m_name << "\"" << endl;
+
+    return *this;
+}
+
+Flattener &Flattener::operator<<(const Polygon &poly) {
+    if (m_current_polarity == GRB_POL_DARK) {
+        d->add_dark_polygon(poly);
+
+    } else { /* clear */
+        d->add_clear_polygon(poly);
+        render_out_clear_polys();
+    }
+
+    return *this;
+}
+
+void Flattener::flush_polys_to_sink() {
+    *this << GRB_POL_DARK; /* force render */
+    m_sink << GRB_POL_DARK;
+
+    for (auto &poly : d->dark_polys) {
+        Polygon poly_out;
+        for (auto &p : poly.vertexes()) {
+            poly_out.emplace_back(d2p{p.x(), p.y()});
+        }
+        m_sink << poly_out;
+    }
+
+    d->clear_polys.clear();
+    d->dark_polys.clear();
+}
+
+void Flattener::footer() {
+    flush_polys_to_sink();
+    m_sink.footer();
+}
+