[Bug 9154] Balls of Steel demo v1.3 fails to start a game ( ddraw7_WaitForVerticalBlank stub too fast, needs real implementation)

https://bugs.winehq.org/show_bug.cgi?id=9154

--- Comment #27 from Henri Verbeet <hverbeet(a)gmail.com> ---
(In reply to André H. from comment #26)
> Well, it was mentioned in bug 38169
> can't we do a usleep here?
> get screen Hz from somewhere and do a usleep(1/Hz * 1000 - x)

I suppose, but that wouldn't actually synchronise with vblank. OML_sync_control
does provide that functionality though, through WaitForMscOML() in particular.
See also wined3d_get_adapter_raster_status().

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