enable native svg renderer over cairo in mapnik python bindings

svg-renderer.diff

diff --git a/bindings/python/build.py b/bindings/python/build.py
index 2a83607..df6dd9d 100644
--- a/bindings/python/build.py
+++ b/bindings/python/build.py
@@ -182,6 +182,9 @@ if 'uninstall' not in COMMAND_LINE_TARGETS:
         py_env.ParseConfig('pkg-config --cflags pycairo')
         py_env.Append(CXXFLAGS = '-DHAVE_PYCAIRO')
 
+    if env['SVG_RENDERER']:
+        py_env.Append(CXXFLAGS = '-DSVG_RENDERER')
+
 libraries.append('boost_thread%s' % env['BOOST_APPEND'])
 _mapnik = py_env.LoadableModule('mapnik/_mapnik', sources, LIBS=libraries, LDMODULEPREFIX='', LDMODULESUFFIX='.so',LINKFLAGS=linkflags)
 
diff --git a/bindings/python/mapnik_python.cpp b/bindings/python/mapnik_python.cpp
index 3f6e76d..d7b870c 100644
--- a/bindings/python/mapnik_python.cpp
+++ b/bindings/python/mapnik_python.cpp
@@ -78,6 +78,9 @@ void export_logger();
 #ifdef HAVE_CAIRO
 #include <mapnik/cairo_renderer.hpp>
 #endif
+#ifdef SVG_RENDERER
+#include <mapnik/svg/output/svg_renderer.hpp>
+#endif
 #include <mapnik/graphics.hpp>
 #include <mapnik/image_util.hpp>
 #include <mapnik/load_map.hpp>
@@ -269,6 +272,18 @@ void render_to_file1(const mapnik::Map& map,
 {
     if (format == "pdf" || format == "svg" || format =="ps" || format == "ARGB32" || format == "RGB24")
     {
+#if defined(SVG_RENDERER)
+        if (format == "svg") {
+            std::ofstream svg_stream(filename.c_str());
+            typedef mapnik::svg_renderer<std::ostream_iterator<char> > svg_ren;
+            std::ostream_iterator<char> output_stream_iterator(svg_stream);
+            svg_ren renderer(map, output_stream_iterator);
+            renderer.apply();
+            svg_stream.close();
+            return;
+        }
+#endif
+
 #if defined(HAVE_CAIRO)
         mapnik::save_to_cairo_file(map,filename,format,1.0);
 #else
@@ -288,6 +303,18 @@ void render_to_file2(const mapnik::Map& map,std::string const& filename)
     std::string format = mapnik::guess_type(filename);
     if (format == "pdf" || format == "svg" || format =="ps")
     {
+#if defined(SVG_RENDERER)
+        if (format == "svg") {
+            std::ofstream svg_stream(filename.c_str());
+            typedef mapnik::svg_renderer<std::ostream_iterator<char> > svg_ren;
+            std::ostream_iterator<char> output_stream_iterator(svg_stream);
+            svg_ren renderer(map, output_stream_iterator);
+            renderer.apply();
+            svg_stream.close();
+            return;
+        }
+#endif
+
 #if defined(HAVE_CAIRO)
         mapnik::save_to_cairo_file(map,filename,format,1.0);
 #else
@@ -310,6 +337,19 @@ void render_to_file3(const mapnik::Map& map,
 {
     if (format == "pdf" || format == "svg" || format =="ps" || format == "ARGB32" || format == "RGB24")
     {
+
+#if defined(SVG_RENDERER)
+        if (format == "svg") {
+            // TODO - support scale_factor
+            std::ofstream svg_stream(filename.c_str());
+            typedef mapnik::svg_renderer<std::ostream_iterator<char> > svg_ren;
+            std::ostream_iterator<char> output_stream_iterator(svg_stream);
+            svg_ren renderer(map, output_stream_iterator);
+            renderer.apply();
+            svg_stream.close();
+            return;
+        }
+#endif
 #if defined(HAVE_CAIRO)
         mapnik::save_to_cairo_file(map,filename,format,scale_factor);
 #else

Thanks for this. So scale_factor is not supported with the native SVG renderer?