is it able to directly draw to the backbuffer(or offScreen framebuffer) of vtkOpenGLRenderWindow by CUDA

Development
1
  1. not OffScreen mode, is it to cudaGraphicsGLRegisterBuffer the backBuffer of vtkOpenGLRenderWindow?
  2. while OffScreen mode, is it to cudaGraphicsGLRegisterBuffer the framebuffer of vtkOpenGLRenderWindow? meanwhile using CreateHardwareOffScreenWindow, CreateHardwareOffScreenBuffers, BindHardwareOffScreenBuffers.
    Thanks!