Re: [PATCH v3 0/9] MR4533: winex11: Detach / attach vulkan window surfaces as needed.

[Paul Gofman (＠gofman)]

Paul Gofman (@gofman) commented about dlls/winex11.drv/window.c:
>  XDeleteContext( data->display, data->client_window, winContext );
>
>  XReparentWindow( gdi_display, data->client_window, get_dummy_parent(), 0, 0 );
>
> +#ifdef SONAME_LIBXCOMPOSITE
> - if (usexcomposite) pXCompositeRedirectWindow( gdi_display, data->client_window, CompositeRedirectManual );

This is actually a workaround for Xwayland bug. When a Vulkan window has fullscreen size and position, Xwayland tends to fully flip it onscreen even regardless of it being a child of 1x1 size parent. It does so not only over some same app other windows but over the whole desktop breaking it completely. This workaround helps in some cases but only partially, there were still cases when it will flip not minding composite redirect as well. So I am not entirely certain if bringing in this part now is justified.