Now i'm in front of a dilema:
I know how to mix pictures writing line of pixels per line of pixels, the thing is that i want to do this in a real time basis or at least near real time.
What i want to do is to pick two viewports and mix them interlacing the pictures, so i can do some kind of stereoscopic real time previewer for people who has displays with interlaced polarization.
So is there a way to mix pictures in real time, or near real time? I don't want any render, any alpha, anything special, just grab two viewports and mix them, but as fast as possible.