[Bug 43246] King's Bounty: The Legend suffers from performance issues

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43246

--- Comment #10 from Matteo Bruni <matteo.mystral at gmail.com> ---
(In reply to Henri Verbeet from comment #2)
> Created attachment 58717 [details]
> hack
> 
> The issue seems to be that the application uses buffers without
> D3DUSAGE_DYNAMIC as if they're dynamic. The attached hack fixes the
> performance for me, but doesn't strike me as correct.

I tested non-dynamic D3DPOOL_DEFAULT buffers on Windows. It looks like there is
no "consensus" wrt NOOVERWRITE maps (the flag is ignored on Nvidia but not on
AMD) but DISCARD does in fact work as you'd expect, i.e. the second map returns
a different memory address from the first and it doesn't block waiting for the
buffer to become idle.

I'll probably have a look at the actual game soon.

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