1 files changed, 99 insertions, 0 deletions
diff --git a/svg-flatten/src/out_gerber.cpp b/svg-flatten/src/out_gerber.cpp
new file mode 100644
index 0000000..c320184
--- /dev/null
+++ b/svg-flatten/src/out_gerber.cpp
@@ -0,0 +1,99 @@
+/*
+ * 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>
+
+using namespace gerbolyze;
+using namespace std;
+
+SimpleGerberOutput::SimpleGerberOutput(ostream &out, bool only_polys, int digits_int, int digits_frac, d2p offset)
+    : StreamPolygonSink(out, only_polys),
+    m_digits_int(digits_int),
+    m_digits_frac(digits_frac),
+    m_offset(offset)
+{
+    assert(1 <= digits_int && digits_int <= 9);
+    assert(0 <= digits_frac && digits_frac <= 9);
+    m_gerber_scale = round(pow(10, m_digits_frac));
+}
+
+void SimpleGerberOutput::header_impl(d2p origin, d2p size) {
+    m_offset[0] += origin[0];
+    m_offset[1] += origin[1];
+    m_width = size[0] - origin[0];
+    m_height = size[1] - origin[1];
+    
+    if (pow(10, m_digits_int-1) < max(m_width, m_height)) {
+        cerr << "Warning: Input has bounding box too large for " << m_digits_int << "." << m_digits_frac << " gerber resolution!" << endl;
+    }
+
+    m_out << "%FSLAX" << m_digits_int << m_digits_frac << "Y" << m_digits_int << m_digits_frac << "*%" << endl;
+    m_out << "%MOMM*%" << endl;
+    m_out << "%LPD*%" << endl;
+    m_out << "G01*" << endl;
+    m_out << "%ADD10C,0.050000*%" << endl;
+    m_out << "D10*" << endl;
+}
+
+SimpleGerberOutput& SimpleGerberOutput::operator<<(GerberPolarityToken pol) {
+    if (pol == GRB_POL_DARK) {
+        m_out << "%LPD*%" << endl;
+    } else if (pol == GRB_POL_CLEAR) {
+        m_out << "%LPC*%" << endl;
+    } else {
+        assert(false);
+    }
+
+    return *this;
+}
+SimpleGerberOutput& SimpleGerberOutput::operator<<(const Polygon &poly) {
+    if (poly.size() < 3) {
+        cerr << "Warning: " << poly.size() << "-element polygon passed to SimpleGerberOutput" << endl;
+        return *this;
+    }
+
+    /* NOTE: Clipper and gerber both have different fixed-point scales. We get points in double mm. */
+    double x = round((poly[0][0] + m_offset[0]) * m_gerber_scale);
+    double y = round((m_height - poly[0][1] + m_offset[1]) * m_gerber_scale);
+    m_out << "G36*" << endl;
+    m_out << "X" << setw(m_digits_int + m_digits_frac) << setfill('0') << (long long int)x
+          << "Y" << setw(m_digits_int + m_digits_frac) << setfill('0') << (long long int)y
+          << "D02*" << endl;
+    m_out << "G01*" << endl;
+    for (size_t i=1; i<poly.size(); i++) {
+        double x = round((poly[i][0] + m_offset[0]) * m_gerber_scale);
+        double y = round((m_height - poly[i][1] + m_offset[1]) * m_gerber_scale);
+        m_out << "X" << setw(m_digits_int + m_digits_frac) << setfill('0') << (long long int)x
+              << "Y" << setw(m_digits_int + m_digits_frac) << setfill('0') << (long long int)y
+              << "D01*" << endl;
+    }
+    m_out << "G37*" << endl;
+
+    return *this;
+}
+
+void SimpleGerberOutput::footer_impl() {
+    m_out << "M02*" << endl;
+}
+