[Bug 50293] native dxdiag complains about missing dxapi.sys (et al)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50293

--- Comment #4 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Austin English from comment #3)
> (In reply to Zebediah Figura from comment #2)
> > This is an awful lot of stub DLLs to add. What's the benefit of native
> > dxdiag?
> 
> A fair point. Builtin is basically a stub.
> 
> dxdiag itself (used to be) popular for users to gather the state of their
> systems, and to verify that the system was in a good state for DirectX
> applications, see e.g.,
> https://support.nexon.net/hc/en-us/articles/204335909-How-to-create-a-DxDiag-
> Report-in-Windows.

Yeah, I guess that was not a great question per se. I think native dxdiag
certainly does have some value, but it's not clear to me that the "DirectX
Files" tab has any value. After all, all of that information is faked; none of
it actually exposes anything about the host system (or about the functionality
of Wine code, really.)

> 
> Note that it doesn't check for _all_ dlls, (i.e., it doesn't look for
> comctl32/user32), it's only looking for DirectX affiliated dlls. While we
> can't guarantee that each one is used by some games, it seems reasonable
> that at least some games look for each of those dlls).
> 
> That said, given that it's 2021 and most of the dlls haven't gotten bug
> reports mean that those dlls may not be needed (or we aren't getting bug
> reports about it)..

I think most of them are basically internal DLLs required by other parts of the
DirectX runtime, and so not something user space would ever access. A couple of
them I do recognize as potentially having documented and user-accessible parts
(dsdmoprp, arguably qdv and qedwipes), but I don't think there's much point in
adding stubs like this—missing DLLs or COM objects are usually quite clear in
logs.

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