From 1d6d4e4f14b395b7a16802ac909687dfa2b447e4 Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Sun, 25 Apr 2021 14:41:06 +0200
Subject: svg-flatten: Add support for line thickness to board outline exporter

---
 svg-flatten/include/gerbolyze.hpp | 10 ++++++++++
 svg-flatten/src/out_gerber.cpp    | 18 +++++++++++++++++-
 svg-flatten/src/svg_doc.cpp       | 11 +++++++----
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/svg-flatten/include/gerbolyze.hpp b/svg-flatten/include/gerbolyze.hpp
index 0b4f03e..a30d7eb 100644
--- a/svg-flatten/include/gerbolyze.hpp
+++ b/svg-flatten/include/gerbolyze.hpp
@@ -44,6 +44,12 @@ namespace gerbolyze {
         std::string m_name;
     };
 
+    class ApertureToken {
+    public:
+        ApertureToken(double size=0.0) : m_size(size) {}
+        double m_size = 0.0;
+    };
+
     class PolygonSink {
         public:
             virtual ~PolygonSink() {}
@@ -66,6 +72,7 @@ namespace gerbolyze {
             };
             virtual PolygonSink &operator<<(const LayerNameToken &) { return *this; };
             virtual PolygonSink &operator<<(GerberPolarityToken pol) = 0;
+            virtual PolygonSink &operator<<(const ApertureToken &) { return *this; };
             virtual void footer() {}
     };
 
@@ -229,6 +236,7 @@ namespace gerbolyze {
         virtual ~SimpleGerberOutput() {}
         virtual SimpleGerberOutput &operator<<(const Polygon &poly);
         virtual SimpleGerberOutput &operator<<(GerberPolarityToken pol);
+        virtual SimpleGerberOutput &operator<<(const ApertureToken &ap);
         virtual void header_impl(d2p origin, d2p size);
         virtual void footer_impl();
 
@@ -242,6 +250,8 @@ namespace gerbolyze {
         double m_scale;
         bool m_flip_pol;
         bool m_outline_mode;
+        double m_current_aperture;
+        unsigned int m_aperture_num;
     };
 
     class SimpleSVGOutput : public StreamPolygonSink {
diff --git a/svg-flatten/src/out_gerber.cpp b/svg-flatten/src/out_gerber.cpp
index 94c01de..f842e15 100644
--- a/svg-flatten/src/out_gerber.cpp
+++ b/svg-flatten/src/out_gerber.cpp
@@ -34,7 +34,9 @@ SimpleGerberOutput::SimpleGerberOutput(ostream &out, bool only_polys, int digits
     m_offset(offset),
     m_scale(scale),
     m_flip_pol(flip_polarity),
-    m_outline_mode(outline_mode)
+    m_outline_mode(outline_mode),
+    m_current_aperture(0.0),
+    m_aperture_num(10) /* See gerber standard */
 {
     assert(1 <= digits_int && digits_int <= 9);
     assert(0 <= digits_frac && digits_frac <= 9);
@@ -59,6 +61,20 @@ void SimpleGerberOutput::header_impl(d2p origin, d2p size) {
     m_out << "D10*" << endl;
 }
 
+SimpleGerberOutput& SimpleGerberOutput::operator<<(const ApertureToken &ap) {
+    if (ap.m_size == m_current_aperture) {
+        return *this;
+    }
+    m_current_aperture = ap.m_size;
+    m_aperture_num += 1;
+
+    double size = (ap.m_size > 0.0) ? ap.m_size : 0.05;
+    m_out << "%ADD" << m_aperture_num << "C," << size << "*%" << endl;
+    m_out << "D" << m_aperture_num << "*" << endl;
+
+    return *this;
+}
+
 SimpleGerberOutput& SimpleGerberOutput::operator<<(GerberPolarityToken pol) {
     assert(pol == GRB_POL_DARK || pol == GRB_POL_CLEAR);
 
diff --git a/svg-flatten/src/svg_doc.cpp b/svg-flatten/src/svg_doc.cpp
index 48ee56d..6d41aca 100644
--- a/svg-flatten/src/svg_doc.cpp
+++ b/svg-flatten/src/svg_doc.cpp
@@ -226,6 +226,8 @@ void gerbolyze::SVGDocument::export_svg_path(xform2d &mat, const RenderSettings
     /* Load path from SVG path data and transform into document units. */
     xform2d local_xf(mat);
     local_xf.transform(xform2d(node.attribute("transform").value()));
+    /* FIXME transform stroke width here? */
+    stroke_width = local_xf.doc2phys_dist(stroke_width);
 
     PolyTree ptree_stroke;
     PolyTree ptree_fill;
@@ -307,7 +309,7 @@ void gerbolyze::SVGDocument::export_svg_path(xform2d &mat, const RenderSettings
                 if (rset.outline_mode) {
                     /* In outline mode, manually close polys */
                     poly.push_back(poly[0]);
-                    *polygon_sink << poly;
+                    *polygon_sink << ApertureToken() << poly;
 
                 } else {
                     offx.AddPath(poly, join_type, etClosedLine);
@@ -320,7 +322,7 @@ void gerbolyze::SVGDocument::export_svg_path(xform2d &mat, const RenderSettings
                 dash_path(poly_copy, out, dasharray);
 
                 if (rset.outline_mode) {
-                    *polygon_sink << out;
+                    *polygon_sink << ApertureToken(stroke_width) << out;
                 } else {
                     offx.AddPaths(out, join_type, end_type);
                 }
@@ -332,7 +334,7 @@ void gerbolyze::SVGDocument::export_svg_path(xform2d &mat, const RenderSettings
             dash_path(poly, out, dasharray);
 
             if (rset.outline_mode) {
-                *polygon_sink << out;
+                *polygon_sink << ApertureToken(stroke_width) << out;
             } else {
                 offx.AddPaths(out, join_type, end_type);
             }
@@ -373,10 +375,11 @@ void gerbolyze::SVGDocument::export_svg_path(xform2d &mat, const RenderSettings
                 Paths s_polys;
                 dehole_polytree(ptree, s_polys);
 
-                *polygon_sink << (stroke_color == GRB_DARK ? GRB_POL_DARK : GRB_POL_CLEAR) << s_polys;
+                *polygon_sink << ApertureToken() << (stroke_color == GRB_DARK ? GRB_POL_DARK : GRB_POL_CLEAR) << s_polys;
             }
         }
     }
+    *polygon_sink << ApertureToken();
 }
 
 void gerbolyze::SVGDocument::render(const RenderSettings &rset, PolygonSink &sink, const ElementSelector *sel) {
-- 
cgit