RE: No right way to share PCI device memory with user- mod e?

You can try http://dri.sourceforge.net/ for a starting point. This is
overwhelmingly a Unix initiative, spearheaded by heavies from the graphics
side, for example, Brian Paul, the creator of the Mesa implementation of
OpenGL. I’m not sure whether anyone has done any work to make it happen
under Windows, though.

Alberto.

-----Original Message-----
From: Tzvetan Mikov [mailto:xxxxx@jupiter.com]
Sent: Thursday, October 25, 2001 4:33 PM
To: NT Developers Interest List
Subject: [ntdev] RE: No right way to share PCI device memory with user
mod e?

To tell you the truth, this is the first time I hear about “Direct
Rendering”. It seems that I will have to check it out. Can you give me a
link?

-tzvetan

----- Original Message -----
From: “Moreira, Alberto”
To: “NT Developers Interest List”
Sent: Thursday, October 25, 2001 7:08 AM
Subject: [ntdev] RE: No right way to share PCI device memory with user mod
e?

> I would check what the Direct Rendering crowd is doing, they have solved
the
> problem and their graphics are not slow. Incidentally, they do it under
Unix
> too.
>
> Alberto.
>
>
> -----Original Message-----
> From: Harmon, Larry CT [mailto:xxxxx@diebold.com]
> Sent: Thursday, October 25, 2001 7:08 AM
> To: NT Developers Interest List
> Subject: [ntdev] RE: No right way to share PCI device memory with user
> mod e?
>
>
> tzvetan,
> There is no good way of sharing memory between a driver and a user
> mode application. Thats why you haven’t found any direct answers. NT was
> designed to isolate the hardware from user tasks, so sharing memory is
> contrary to NT’s design.
> NT’s archicture requires a kernel mode driver to pass data between devices
> and applications. It isn’t DOS.
>
> Larry
>


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