OpenGL Depth buffer

[DEElekgolo]

I realize that the openGL context is created for me but how would I manage getting the depth buffer out of it so I pass it to my GLSL shader?

[Laurent]

To do what you want, you must use Frame Buffer Objects (FBO). Copying the back buffer to a texture manually would be very very slow.

[DEElekgolo]

So I should be binding my own frame buffer/render buffer rather than getting the buffers that the window context already uses?

[Laurent]

If you want to use them as textures, yes.