Re: [PATCH v2 0/1] MR9778: wined3d: Keep a reference on the swapchain the DC is borrowed from.

[Rémi Bernon (＠rbernon)]

It doesn't do the same thing, swapchain DCs are meant to be presented to the window directly (whether this ends up being onscreen or blitted in win32u is up to win32u), while backup DC involves a GDI blit from wined3d side.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9778#note_125777