[SDL] opengl buffer state

[Rhythmic Fistman]

> From: "Ryan C. Gordon" <icculus at icculus.org>
>
> > Is there any SDL way of asking for only 1 buffer?
>
> SDL_GL_SetAttribute() can be used to select double/single buffering, but
> in OpenGL, you really don't want to do a dirty rectangle thing...clear
> the color buffer every frame, redraw the whole scene and swap buffers.

Thanks, SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0) does the trick, in the
sense that the resulting image is complete. I didn't actually want opengl,
I just wanted vbl syncing, hence this experiment, which was a failure:
there's still tearing, and the image suffers the positioning bug of the
other mail.

Not sure what to do, I don't really want to translate all the sprite
drawing code to opengl, it's a bit of a pain as there's a stack of bit fiddling.

RF.

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felix: lightweight threads, HOFs and game scripting.
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