[Bug 45766] Doom 3: BFG hangs during launch

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=45766

--- Comment #3 from Sven Arvidsson <sa at whiz.se> ---
Created attachment 70635
  --> https://bugs.winehq.org/attachment.cgi?id=70635
hack for X11DRV_ToUnicodeEx

I finally had time to look into this and it turns out the game is stuck in an
infinite loop in ToUnicodeEx when looking up keymappings. Specifically this
call:

  0024:trace:keyboard:ToUnicodeEx virt 186, scan 27, state 0226F054, str
0226F154, size 5, flags 0, layout 08090809.

In my (Swedish) keyboard layout this maps to a dead_diaeresis.

On Windows a second consecutive call to ToUnicodeEx with a dead key should
return a positive result (similar to pressing the key twice on the keyboard)
this is unimplemented in Wine which keeps returning -1, and the game is stuck
there.

Another issue is that changing the keyboard layout on the fly is not enough to
reproduce or work around the bug. X11DRV_ToUnicodeEx keeps looking up the key
for the original keyboard layout.

I'm attaching a small patch that works around the problem with the game, but
it's just a hack that returns 1 for a second call with the same dead key.

I'm not sure where the bug should be reassigned, winex11.drv?

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