only register pointer to python conversion once (ref #104)

Author: artemp

src/mapnik_datasource.cpp

@@ -180,8 +180,8 @@ void export_datasource()
         .value("Collection",mapnik::datasource_geometry_t::Collection)
         ;
 
-    class_<datasource,std::shared_ptr<datasource>,
-        boost::noncopyable>("Datasource",no_init)
+    class_<datasource,
+           boost::noncopyable>("Datasource",no_init)
         .def("type",&datasource::type)
         .def("geometry_type",&datasource::get_geometry_type)
         .def("describe",&describe)
@@ -195,6 +195,7 @@ void export_datasource()
              "These vary depending on the type of data source.")
         .def(self == self)
         ;
+
     register_ptr_to_python<std::shared_ptr<datasource> >();
 
     def("CreateDatasource",&create_datasource);

src/mapnik_feature.cpp

@@ -211,8 +211,7 @@ void export_feature()
         .def("push", &context_type::push)
         ;
 
-    class_<mapnik::feature_impl,std::shared_ptr<mapnik::feature_impl>,
-        boost::noncopyable>("Feature",init<context_ptr,mapnik::value_integer>("Default ctor."))
+    class_<mapnik::feature_impl, boost::noncopyable>("Feature",init<context_ptr,mapnik::value_integer>("Default ctor."))
         .def("id",&mapnik::feature_impl::id)
         .add_property("geometry",
                       make_function(&mapnik::feature_impl::get_geometry,return_value_policy<reference_existing_object>()),

src/mapnik_featureset.cpp

@@ -56,8 +56,7 @@ void export_featureset()
 {
     using namespace boost::python;
     // Featureset implements Python iterator interface
-    class_<mapnik::Featureset, std::shared_ptr<mapnik::Featureset>,
-           boost::noncopyable>("Featureset", no_init)
+    class_<mapnik::Featureset, boost::noncopyable>("Featureset", no_init)
         .def("__iter__", pass_through)
         .def("__next__", next)
         // Python2 support

src/mapnik_geometry.cpp

@@ -259,7 +259,7 @@ void export_geometry()
         .def("to_wkt",&to_wkt_impl)
         ;
 
-    class_<geometry<double>, std::shared_ptr<geometry<double> >, boost::noncopyable>("Geometry",no_init)
+    class_<geometry<double>, boost::noncopyable>("Geometry",no_init)
         .def("envelope",&geometry_envelope_impl)
         .def("from_geojson", from_geojson_impl)
         .def("from_wkt", from_wkt_impl)
@@ -282,5 +282,6 @@ void export_geometry()
         //.def("to_svg",&to_svg)
         // TODO add other geometry_type methods
         ;
+
     register_ptr_to_python<std::shared_ptr<geometry<double>> >();
 }

src/mapnik_image.cpp

@@ -389,7 +389,7 @@ void export_image()
         .value("gray64f", mapnik::image_dtype_gray64f)
         ;
 
-    class_<image_any,std::shared_ptr<image_any>, boost::noncopyable >("Image","This class represents a image.",init<int,int>())
+    class_<image_any, boost::noncopyable >("Image","This class represents a image.",init<int,int>())
         .def(init<int,int,mapnik::image_dtype>())
         .def(init<int,int,mapnik::image_dtype,bool>())
         .def(init<int,int,mapnik::image_dtype,bool,bool>())