John Carmack wrote:
>
> The following diff helps the cinematic playback speed in Q2/Q3 (which is
> just a big texSubImage call each frame), but the other part of the problem
> is the memory allocation and copying going on in unpackimage.
>
> How reasonable would it be to allow properly formatted teximage/texsubimage
> calls to bypass the unpacking stage? Could the images be flagged and made
> to reference the data in place when it is known to be ok, instead of
> allocating/copying/freeing?
>
> This would be a good general purpose optimization that would help a lot of
> applications that pump a lot of texels through mesa.
All the texture download paths in Mesa are quite slow. That's some
old code that's overdue for a rewrite. I hope to do so in the not-
too-distant future.
Thanks for the patch. I'll examine it and commit it in the next 24 hrs.
-Brian
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