Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems

[David Holm <address@hidden>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Thursday 13 May 2004 05.52, Natalia Portillo wrote:
> Seems easir to implement DirectX (full or partial) emulation.

Wouldn't it just be easier to use qemu-fast with Wine(X)?

> On Wed, 12 May 2004 22:10:57 +0200 (CEST)
>
> Grzegorz Kulewski <address@hidden> wrote:
> > On Wed, 12 May 2004, Fabrice Bellard wrote:
> > > Why not using the main graphic card ? dosemu does it... All you need is
> > > "just" to be able to switch the rendering contexts. So it is a host VGA
> > > card dependent code, but it can be rather small.
> >
> > I want to be able to play games in it!!! ;-)
> > That means: I am thinking about using as a second card some really good
> > 3d accelerator on pci bus (or on agp if first card is on pci). And that
> > card can not be used by two operating systems at the same time because of
> > some uninterruptable mutualy exclusive operations such as transferring
> > big texture from system memory to video card memory. It can take very
> > long and graphic card can not do anything other until it finishes. So
> > host will not be able to display anything in that time! And we have no
> > method to tell host system: stop using that card for 10ms. And there will
> > be problems with irq routing probably. Think that this card is driven by
> > some closed source binary drivers and you have no specs available. When
> > using second card host system kernel does not touch it at all. But we
> > will need "screenshot" of it from time to time. This can be achieved in
> > two ways:
> >
> > 1. Use guest program that will make screenshot and tell qemu where in
> > memmory it resides or will send it in any other way.
> >
> > 2. qemu will wait until card is free (it can be probably easily checked
> > by some io port sequence) then will stop emulation and will copy
> > screenshot.
> >
> > I hope it all can be done! :-)
> > And hope somebody else will do it! :-)
> >
> >
> > Grzegorz Kulewski
> >
> > > Grzegorz Kulewski wrote:
> > > > Another idea is to allow qemu use second graphic card in your pc (not
> > > > used by the host). I have one spare GeForce 2 @ PCI so I will be glad
> > > > to see this implemented. Before that we will probably need working
> > > > PCI layer in qemu. And I we can track the area in graphic memory used
> > > > by current screen maybe it is possible to write driver that will copy
> > > > screen from second card to a window on first (this could be
> > > > implemented on guest or on host).
> > > >
> > > >
> > > > Grzegorz Kulewski
> > > >
> > > > On Wed, 12 May 2004, Natalia Portillo wrote:
> > > >>This is the same as making a DirectDraw (2D part of DirectX) driver.
> > > >>
> > > >>A full DirectX package of drivers will be great: DirectDraw (for 2D),
> > > >> Direct3D (converting calls to OpenGL in host),
> > > >> DirectSound/DirectSound3D and DirectMusic (for the sound card), and
> > > >> DirectInput (keyboards, mice, joysticks)...
> > > >>
> > > >>On Wed, 12 May 2004 12:30:08 +0100
> > > >>
> > > >>"Jamie Burns" <address@hidden> wrote:
> > > >>>Wouldn't a 2D accelerator be a good idea first? ;o)
> > > >>>
> > > >>>If Windows asks for a "line" to be drawn, or a "blit-op" then could
> > > >>> that be passed through to the QEMU emulated video hardware, which
> > > >>> in turn could simply get SDL or whatever to do the required
> > > >>> operation. Then 2D graphics would speed up immensly.
> > > >>>
> > > >>>Are there any documents giving an overview of how the QEUM
> > > >>> architecture works in this respect? I would work on a driver in my
> > > >>> spare time but really do not know where to start.
> > > >>>
> > > >>>J.
> > > >>>
> > > >>>----- Original Message -----
> > > >>>From: "Grzegorz Kulewski" <address@hidden>
> > > >>>To: <address@hidden>
> > > >>>Sent: Wednesday, May 12, 2004 11:20 AM
> > > >>>Subject: Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems
> > > >>>
> > > >>>>On Wed, 12 May 2004, Filip Navara wrote:
> > > >>>>>Jean-Michel POURE wrote:
> > > >>>>>>>if anyone is interested I have created open source QEMU/Bochs
> > > >>>>>>> video driver for Windows NT/2K/XP/2003.
> > > >>>>>>>Binaries - www.volny.cz/xnavara/qemuvid_bin.zip
> > > >>>>>>>Sources - www.volny.cz/xnavara/qemuvid_src.zip
> > > >>>>>>
> > > >>>>>>Are these VBE drivers?
> > > >>>>>
> > > >>>>>Not in the sense of VBE 3.0 specification. I have such driver too,
> > > >>>>> but it propably works only on ReactOS because of using
> > > >>>>> undocumented API.
> > > >>>>>
> > > >>>>>>Can you describe the drivers and its capabilities in more
> > > >>>>>> details?
> > > >>>>>
> > > >>>>>The driver uses the Bochs/QEMU VBE I/O port, the same method as
> > > >>>>> used by BXVGA. My implementation is a bit simplier, but still
> > > >>>>> with the same features. It also uses the Linear FrameBuffer
> > > >>>>> feature of the Bochs/QEMU interface that wasn't available at the
> > > >>>>> time when BXVGA was written.
> > > >>>>
> > > >>>>Are there any driver that works with win9x? Can you port your (or
> > > >>>> write it from scratch)?
> > > >>>>
> > > >>>>Will your driver work in Bochs?
> > > >>>>
> > > >>>>Is it possible to create driver that emulates DirectX and OpenGL by
> > > >>>>sending the OpenGL commands to the host OpenGL libs. DirectX
> > > >>>> commands should probably be converted before into OpenGL.
> > > >>>>
> > > >>>>
> > > >>>>Thanks for your work,
> > > >>>>
> > > >>>>Grzegorz Kulewski
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>>_______________________________________________
> > > >>>>Qemu-devel mailing list
> > > >>>>address@hidden
> > > >>>>http://mail.nongnu.org/mailman/listinfo/qemu-devel
> > > >>>
> > > >>>_______________________________________________
> > > >>>Qemu-devel mailing list
> > > >>>address@hidden
> > > >>>http://mail.nongnu.org/mailman/listinfo/qemu-devel
> > > >>
> > > >>_______________________________________________
> > > >>Qemu-devel mailing list
> > > >>address@hidden
> > > >>http://mail.nongnu.org/mailman/listinfo/qemu-devel
> > > >
> > > > _______________________________________________
> > > > Qemu-devel mailing list
> > > > address@hidden
> > > > http://mail.nongnu.org/mailman/listinfo/qemu-devel
> > >
> > > _______________________________________________
> > > Qemu-devel mailing list
> > > address@hidden
> > > http://mail.nongnu.org/mailman/listinfo/qemu-devel
> >
> > _______________________________________________
> > Qemu-devel mailing list
> > address@hidden
> > http://mail.nongnu.org/mailman/listinfo/qemu-devel
>
> _______________________________________________
> Qemu-devel mailing list
> address@hidden
> http://mail.nongnu.org/mailman/listinfo/qemu-devel
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFAozBwxVDe1wIoqX0RAs/qAJwK2GnXP9KlNw7/JtmaRL+7KZgwBgCgovEW
ge3v9/a/4G+1GX+qciM9Qa0=
=pIb8
-----END PGP SIGNATURE-----