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

[Fabrice Bellard <fabrice@bellard.org>]

What 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.

Fabrice.

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" <jamie.burns@dynamicexpression.co.uk> 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" <kangur@polcom.net>
>>>To: <qemu-devel@nongnu.org>
>>>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
>>>>
>>>>
>>>>
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>>>
>>>
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>>
>>
>>
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> 
> 
> 
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