Render FBO to window example (post processing)


I am trying to render a Frame buffer object on the whole window.
I have found examples such as this, but it is simply not working (probably due to my limited knowledge of OpenGl). Does anyone have a minimal full example of using FBO for post processing?
Also I am using an high level library that creates the FBO, should this be a problem (Mixing my raw gl code with library gl code)?

I look forward to your reply

Thank you!

You just have to render a quad to screen with your fbo as texture…