Re: Sharing a COM object in a MMF

From: Tim Robinson (tim.at.gaat.freeserve.co.uk_at_invalid.com)
Date: 02/29/04 

Date: Sun, 29 Feb 2004 11:41:57 -0000

I'm not sure the DirectX interfaces will work cross-process -- there's a lot
of stuff in there (e.g. calls which lock surfaces or buffers) which are
impossible to marshal.

I would recommend putting together a custom COM interface in a
out-of-process server which exposed the required functionality, then hiding
the DirectX stuff deep down inside that. 

-- 
Tim Robinson (MVP, Windows SDK)
http://mobius.sourceforge.net/
"Ben Ashley" <no@bloody.way> wrote in message
news:%23o5IQhq$DHA.1036@TK2MSFTNGP10.phx.gbl...
> Ok well if I was going down this road, I'd make the EXE and out of process
> server (create it with the ATL Wizard (EXE)), and have that create and
> initialise the D3D Device.  I'd then create another COM object which is
> creatable by other processes.  One of the properties of this would be a
> property that returned the D3D Device interface.  Other processes can then
> create an instance of this object, and obtain the interface.
>
> I'm not sure how well it would work, but if it has cross-process issues
you
> could make the object above more complex and simply forward calls to the
D3D
> Device.
>
> Watch out for multi-threading issues!
>
> "Steven" <anonymous@discussions.microsoft.com> wrote in message
> news:0E90E257-9BF2-4127-BF85-11803AA79CC0@microsoft.com...
> > Ok.
> >
> > I am trying to inject a D3D device into a existing process and then give
> other processes access to this Device through the shared dll (that injects
> the Device).
> >
> > I am sure that their are other complications and issues to deal with
(when
> injecting a Device), however, this is needed for demonstration purposes,
and
> I am only interested in achieving the above technical aspect at this
point.
> >
> > I hope this explains what I am trying to do.
> >
> > Thanks,
> >
> > Steven
>
>

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