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From: "Jamie Burns" <jamie.burns@dynamicexpression.co.uk>
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Subject: Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems
Date: Wed, 12 May 2004 23:57:31 +0100
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To: qemu-devel@nongnu.org


GDI can indeed be accelerated, and this was the first type of graphics card
acceleration back in the day. Accelerating the user interface (ie. most
applications that are not games!) is fairly important when emulating
Windows. I am pretty sure that no graphics card has had unaccelerated GDI
since Windows 95. QEMU/BOCHS could certainly do with a GDI accelerated
driver to have a reasonable speed display. Also, if GDI is accelerated, then
this reduces the emulated CPU time spent processing GDI calls, speeding up
QEMU in general.

:o)

----- Original Message ----- 
From: "Grzegorz Kulewski" <kangur@polcom.net>
To: <qemu-devel@nongnu.org>
Sent: Wednesday, May 12, 2004 10:52 PM
Subject: Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems


> On Wed, 12 May 2004, Filip Navara wrote:
> > Natalia Portillo wrote:
> > >DirectDraw is the accelerator for GDI.
> >
> > This is not correct. At the driver level GDI calls and DirectDraw calls
> > are completly separate interfaces implemented different way.
>
> You are unfortunatelly right. GDI was introduced a lot ealier than
> DirectX (I think before win95). But GDI can be not accelerated by graphic
> card but by qemu (using sdl or something like that) because today apps are
> using GDI mainly for user interface and not for advanced drawing I think.
> Right?
>
>
> Grzegorz Kulewski
>
>
>
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