[Bug 27482] Tomb Raider III demo crashes in the launcher

http://bugs.winehq.org/show_bug.cgi?id=27482

--- Comment #11 from Henri Verbeet  2012-01-20 13:01:18 CST ---
(In reply to comment #10)
>  if (!iface) return NULL;
> - assert(iface->lpVtbl == &ddraw_surface7_vtbl);
> - return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface7_iface);
> - if (iface->lpVtbl == &ddraw_surface7_vtbl)
> -
>    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface7_iface);
> - if (((IDirectDrawSurface4 *)iface)->lpVtbl == &ddraw_surface4_vtbl)
> -
>    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface4_iface);
> - if (((IDirectDrawSurface3 *)iface)->lpVtbl == &ddraw_surface3_vtbl)
> -
>    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface3_iface);
> - if (((IDirectDrawSurface2 *)iface)->lpVtbl == &ddraw_surface2_vtbl)
> -
>    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface2_iface);
> - if (((IDirectDrawSurface *)iface)->lpVtbl == &ddraw_surface1_vtbl)
> -
>    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface_iface);
> -
> - FIXME("Unknown interface for object at %p.\n", iface);
> - return NULL;

Although it would still not make me feel particularly happy about all this,
can't you just explicitly QueryInterface() for the IDirectDrawSurface7
interface and then continue as before?