Interop Input and Output

[MasonJohnHawver42]

Disclaimer: I haven't attempted to do this yet, but if someone has it would be very helpful. In a simulation rendered by OpenGL a left and a right view are rendered into two frame-buffers. The frame-buffers are stored on the VRAM (GPU) and I want to pass the frame-buffers ids (pointers) to libSGM to compute the disparity map and keep it in VRAM (GPU). Then finally I want to pass the disparity map to another process that is running a neural network that takes a disparity map as part of its input. Once this is done the disparity map can be freed from VRAM. How can I do this with minimal pain?