Allow passing buffer to serializers that support it

src/serializers/geometry_obj_plugin.cpp

@@ -50,6 +50,16 @@ plugin::metadata plugin_metadata() {
 }
 
 boost::shared_ptr<GeometrySerializer> create_serializer(const geometry_serializer_context& context) {
+	if (context.output_temp_stream || context.output_stream) {
+		stream_or_filename obj_filename = context.output_temp_stream
+			? *context.output_temp_stream
+			: stream_or_filename(context.output_temp_filename);
+		stream_or_filename mtl_filename = context.output_stream
+			? *context.output_stream
+			: stream_or_filename(obj_mtl_filename(context.output_filename));
+		return boost::make_shared<WaveFrontOBJSerializer>(
+			obj_filename, mtl_filename, context.geometry_settings, context.serializer_settings);
+	}
 	return boost::make_shared<WaveFrontOBJSerializer>(context.output_temp_filename, obj_mtl_filename(context.output_filename), context.geometry_settings, context.serializer_settings);
 }
 

src/serializers/geometry_serializer_plugin.h

@@ -54,6 +54,8 @@ struct SERIALIZERS_API geometry_serializer_context {
 	std::string output_temp_filename;
 	ifcopenshell::geometry::Settings& geometry_settings;
 	const ifcopenshell::geometry::SerializerSettings& serializer_settings;
+	const stream_or_filename* output_stream = nullptr;
+	const stream_or_filename* output_temp_stream = nullptr;
 };
 
 class SERIALIZERS_API geometry_serializer_registry {

src/serializers/geometry_svg_plugin.cpp

@@ -38,6 +38,10 @@ plugin::metadata plugin_metadata() {
 }
 
 boost::shared_ptr<GeometrySerializer> create_serializer(const geometry_serializer_context& context) {
+	if (context.output_temp_stream) {
+		return boost::make_shared<SvgSerializer>(
+			*context.output_temp_stream, context.geometry_settings, context.serializer_settings);
+	}
 	return boost::make_shared<SvgSerializer>(context.output_temp_filename, context.geometry_settings, context.serializer_settings);
 }
 

src/serializers/geometry_ttl_plugin.cpp

@@ -36,6 +36,10 @@ plugin::metadata plugin_metadata() {
 }
 
 boost::shared_ptr<GeometrySerializer> create_serializer(const geometry_serializer_context& context) {
+	if (context.output_temp_stream) {
+		return boost::make_shared<TtlWktSerializer>(
+			*context.output_temp_stream, context.geometry_settings, context.serializer_settings);
+	}
 	return boost::make_shared<TtlWktSerializer>(context.output_temp_filename, context.geometry_settings, context.serializer_settings);
 }