[Bug 52684] Command and Conquer Generals (and C&C Zero Hour) have no ground textures

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52684

--- Comment #9 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Henri Verbeet from comment #8)
> (In reply to Zebediah Figura from comment #7)
> > (3) When loading a texture into TEXTURE_RGB whose valid locations are SYSMEM
> > and CLEARED, we end up clearing the texture again, which can be avoided (if
> > both of those locations really were valid, then SYSMEM is already cleared).
> > This may not be worth optimizing, though, since it'd take some really weird
> > usage to get here after fixing (1). [You'd have to do something like create
> > a staging texture, map it read-only without initializing it, and then copy
> > from it.]
> 
> Uploading from SYSMEM to TEXTURE_RGB in this case may not be quite optimal
> either. It would be better than first clearing SYSMEM and then uploading
> from there, but ideally we'd just clear on the GPU here. The GPU clear would
> almost certainly be a "fast clear", which would be practically free.

Yeah, that's definitely the more salient optimization.

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