Post processing effects with nodes?

Hello all! I have a simple question which may lead to a huge answer. I was wondering if it is possible to be able to apply the render nodes (bloom, ghost effect, etc.) to the regular texture nodes. If it was possible to be done in realtime (at lowest quality), it could be done with render-to-texture (position the camera to look at it) and be awesome!

Note: I am not really a programmer but I was just wondering if it could be done.


Not possible atm.