Re: [PATCH 0/3] MR6025: winewayland: Support shaped and transparent windows.

[Rémi Bernon (＠rbernon)]

On Tue Jul  9 11:53:41 2024 +0000, Alexandros Frantzis wrote:
> From a few synthetic benchmarks I ran locally, this change has a
> significant performance impact (1.7x-3x compared to just doing the
> memcpy, with higher overheads for smaller regions).
> Switching to a manual 32-bit pixel copy while setting the alpha is a
> definite improvement, with the results I am seeing being in the range of
> 1.2x-2x compared to just the memcpy:
> width = rc.right - rc.left;
> for (x = 0; x < height * width; ++x)                                         
>     ((UINT32 *)dst)[x] = ((UINT32 *)src)[x] | 0xff000000;
>
> So perhaps it's worth switching to such a loop?

Sure, now I'm wondering whether we could/should move alpha setting to win32u as well.