access to raw framebuffer object

app/render/renderframebuffer.cpp

@@ -125,3 +125,8 @@ void RenderFramebuffer::Detach()
 
   texture_ = nullptr;
 }
+
+const GLuint &RenderFramebuffer::buffer() const
+{
+  return buffer_;
+}

app/render/renderframebuffer.h

@@ -49,6 +49,8 @@ public:
 
   void Detach();
 
+  const GLuint buffer() const;
+
 private:
   QOpenGLContext* context_;