[SDL] Flickering and division by zero in Windows

[Ryan C. Gordon]

> Thanks for the tips, though. Could you just elaborate on "...you're 
> drawing to one buffer and SDL_gfx is drawing to the other"? Maybe I have 
> missed something while setting up the video mode...

I'm just wondering if SDL_gfx is implicitly calling SDL_Flip() and so 
are you, causing you to each update a different buffer with some part of 
the rendering (and hence, flicker).

I'm just guessing, though. Can you post source code that triggers this 
issue? That would make it much easier to say what's going wrong.

--ryan.