Oh, one more thing. So, I'm sure it's probably not possible to create a render context without having a window of some kind. My guess is that (in Windows, at least), creating a render context requires a Win32 device context, and that getting a device context requires an HWND. So, I suppose my only option would be to create an invisible window. If possible, I think it would be acceptable to create an invisible window, and then just glReadPixels from the back buffer or something.
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