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Originally Posted by Youka
It's mysterious that for every frame in avisynth the same context has to be make the current again. You know why?
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I found that this was
not necessary, per se. Perhaps something in the Lua part (which I don't have) screws with the context? However, in order to support multiple calls to FLuaG in the same script, it would be necessary to re-establish the current context for each frame anyway.
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Never heard of such a case.
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The OpenGL spec allows rendering of non-visible pixels to be skipped (the "pixel ownership test"). And I found I had to change to using a pbuffer to see anything on my laptop (NVidia GeForce FX Go5200).