Sampling pixels...

What's the best way to do it?

To be honest, I can't figure out any way to do it. I've seen an example where someone sampled from a loaded file.
I need need to sample directly from the screen buffer.

I can't find the topic in the forums either. Any help would be great.

what do you mean "sample"?

do you mean reading the pixels from the screen?

You either have to use GrabPixmap and then look at the content of the pixmap data, or use glReadPixels() to save off some pixels into a buffer in main memory then examine that. Not sure if there is a DirectX solution.