[Bug 57072] Window is flashing when painting transluent effects

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57072

--- Comment #1 from Zeb Figura  ---
No, that's pretty much the point of the change. Specifically, as described in
https://gitlab.winehq.org/wine/wine/-/merge_requests/2217, we want wined3d to
be able to set the "internal" pixel format while still knowing whether the
application has set the "public" pixel format.

I can try to debug from a +gdi,+wgl,+d3d,+ddraw,+d3d8,+d3d9,+d3d11 log,
although without access to the application I'm not sure I'll be able to figure
out what's wrong.