[Bug 3747] Motorhead fails to start with message: DirectInput CreateDevice joystick failed

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=3747





------- Additional Comments From tom8311 at wp.pl  2007-05-05 12:50 -------
I belive the problem is related not only to IDirectInputAImpl_GetDeviceStatus,
but also to IDirectInputAImpl_EnumDevices and to dinput.h (and maby others).
When the game is searching for a joystick, it calls the EnumDevices function,
before the GetDeviceStatus function, and passes DIEDFL_ATTACHEDONLY as the last
(dwFlags) argument. It means that it looks for attached joystick(s), and
then checks it's (their) status (see lines 4008-4014 of the fourth attachment -
http://bugs.winehq.org/attachment.cgi?id=4770&action=view).

The problem is that in dinput.h the DIEDFL_ATTACHEDONLY constant has the same
value as the DIEDFL_ALLDEVICES (it's 0, see
http://source.winehq.org/source/include/dinput.h#L188 and
http://source.winehq.org/source/include/dinput.h#L189), while the
DIEDFL_ATTACHEDONLY should have value of 1 (ref. to Microsoft's DX SDK).
However, I don't know if this is a bug or if this has some purpose (eg. the
DIEDFL_ATTACHEDONLY is yet an unsupported flag in Wine).

The other problem is with the EnumDevices function - I've changed the value of
the DIEDFL_ATTACHEDONLY constant to 1 (in dinput.h), but it changes nothing.
Seems like EnumDevices ignores this value and always claims that the joystick
is present (don't know how it works, tho - haven't looked deeper into the code).
But the fact is that EnumDevices finds "Wine Linux-input joystick driver"
- see line 4012 of the fourth attachment - and in case of no device present
it shouldn't enumerate that driver when it's beeing called with dwFlags=1.


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