Add initial directwrite to svg conversion.

src/fonts/FontGlyph.cpp

@@ -1,5 +1,43 @@
 #include "FontGlyph.h"
 
+void GlyphRunOutlines::addToFeature(const Point& point)
+{
+    mFeatures[mFeatures.size() - 1].mPoints.push_back(point);
+}
+
+void GlyphRunOutlines::startFeature(const Point& point, bool isFilled)
+{
+    GlyphRunOutline feature;
+    feature.mFilled = isFilled;
+    feature.mPoints.push_back(point);
+    mFeatures.push_back(feature);
+}
+
+const std::vector<GlyphRunOutline> GlyphRunOutlines::getFeatures() const
+{
+    return mFeatures;
+}
+
+std::string GlyphRunOutlines::toPostScriptPath()
+{
+    std::string path;
+    for (const auto& feature : mFeatures)
+    {
+        if (feature.mPoints.empty())
+        {
+            continue;
+        }
+        auto last_point = feature.mPoints[0];
+        path += "M" + std::to_string(last_point.getX()) + " " + std::to_string(last_point.getY()) + " ";
+        for (std::size_t idx = 1; idx < feature.mPoints.size(); idx++)
+        {
+            path += "L" + std::to_string(feature.mPoints[idx].getX()) + " " + std::to_string(feature.mPoints[idx].getY()) + " ";
+        }
+        path += "z ";
+    }
+    return path;
+}
+
 FontGlyph::FontGlyph(unsigned width, unsigned height, int bearingX, int bearingY,
         int advanceX, std::unique_ptr<Image<unsigned char> > image)
     : mImage(std::move(image)),