Re: XPe Graphics Performance
From: Slobodan Brcin \(eMVP\) (sbrcin_at_ptt.yu)
Date: 01/21/05
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Date: Fri, 21 Jan 2005 18:16:58 +0100
Hi Jim,
Basically this is wrong news group.
What ever apply on XPP for graphic is translated to XPe as well.
Beside video drivers you need to include also GART drivers for your chipset to enable accelerations.
DirectX9 is backward compatible so you can use DirectDraw interfaces in the same way as we were able to use it before. (There are
just no new functionality available)
DirectX can be used trough some form of native DirectX API that was documented almost a year ago by MS. So you can access driver
part of DX trough API functions instead of using COM interfaces.
Regards,
Slobodan
"Jim Boyle" <boylejv@cat.com> wrote in message news:1106318053.353456.154630@f14g2000cwb.googlegroups.com...
> My target system is a 266 MHz Pentium MMX with 256 MB of RAM and a
> CT69000 graphics controller.
>
> I am evaluating the performance of .NET graphics and the CPU load is
> excessive. At first I attributed this problem to the display driver
> (VGASAVE). I thought that by using the CT69000 XPe drivers that
> performance would improve greatly since the app would take advantage of
> hardware acceleration. This did not turn out to be the case. The CPU
> load was the same.
>
> I have been investigating XP and .NET graphics capabilities and have
> found information that states that both XP and .NET use GDI+ and not
> GDI. I have also found some information that GDI+ does not take
> advantage of hardware acceleration and puts all of the graphics
> processing load on the CPU.
>
> Is this the same for XPe? Does XPe use GDI+? Is there a way to
> configure XPe to use GDI?
>
> The information I have found so far is that in order to use hardware
> acceleration under XP you need to use DirectX 9. But DirectX 9
> utilizes Direct3D not DirectDraw according to what I have read. The
> CT69000 graphics controller does not support Direct3D. Its driver only
> supports DirectDraw. Is Direct3D built on top of DirectDraw? Will
> DirectX 9 use DirectDraw and hardware acceleration if it finds that the
> driver supports those capabilities? Or does Direct3D only check if the
> driver supports Driect3D and if not then all the graphics load is back
> on the CPU?
>
> Any information clarifying these issues will be appreciated.
>
> Also, I welcome any suggestions on how to improve .NET graphics
> performance on my target system using XPe.
>
> Thanks,
>
> Jim Boyle
>
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