source/blender/render/hydra/python.cc

@@ -117,12 +117,13 @@ static PyObject *engine_view_draw_func(PyObject * /*self*/, PyObject *args)
   }
 
   ViewportEngine *engine = static_cast<ViewportEngine *>(PyLong_AsVoidPtr(pyengine));
+  bContext *context = pyrna_to_pointer<bContext>(pycontext, &RNA_Context);
 
   CLOG_INFO(LOG_HYDRA_RENDER, 3, "Engine %p", engine);
 
   /* Allow Blender to execute other Python scripts. */
   Py_BEGIN_ALLOW_THREADS;
-  engine->render();
+  engine->render(context);
   Py_END_ALLOW_THREADS;
 
   Py_RETURN_NONE;

source/blender/render/hydra/viewport_engine.cc

@@ -287,6 +287,12 @@ void ViewportEngine::render()
   }
 }
 
+void ViewportEngine::render(bContext *context)
+{
+  context_ = context;
+  render();
+}
+
 void ViewportEngine::notify_status(float /*progress*/, const std::string &info,
                                    const std::string &status)
 {

source/blender/render/hydra/viewport_engine.h

@@ -38,6 +38,7 @@ class ViewportEngine : public Engine {
   using Engine::Engine;
 
   void render() override;
+  void render(bContext *context);
 
  protected:
   void notify_status(float progress, const std::string &title, const std::string &info) override;