I spent much of this week trying to get DirectX / Direct3D / DirectShow / DirectCatastrophy to do what I want. When I told my boss that I’d gotten an answer from nVidia about their StereoBLT API, he asked if it was something I would have figured out on my own — the way you trigger the behavior is the most obscure way of accessing a published hardware feature that I’ve ever heard of.
At the end of the week, I’d found several comments that if you’re looking for a graphics API with Stereo hooks that hardware venders use, instead of hacking in their own wacko trigger, you want OpenGL. Too bad that didn’t occur to me at the beginning of the week — it’s been a long time since I used OpenGL, but apparently I’d have been at least as successful. Oh well.