>Message: 15
>Date: Tue, 26 Feb 2002 12:07:46 -0500 (EST)
>From: "Mike A. Harris" <[EMAIL PROTECTED]>
>To: ODOU Michel <[EMAIL PROTECTED]>
>cc: [EMAIL PROTECTED]
>Organization: Red Hat Inc.
>Subject: [Xpert]Re: Re: Radeon and 2D acceleration

>On Tue, 26 Feb 2002, ODOU Michel wrote:

>>Well, Mike, I understood but I still have some remarks :

>>1- Why does is DRI code used for 2D acceleration ? I thought it
>>was a sort of API (like OpenGL), and didn't expect it to be used
>>in 2D.

>Common misconception.  

Well, see the picture at dri.sf.net docs, that's what it sugests...it may be 
outdated then....

>DRI is an interface between userland and 
>the kernel to do DMA between the video board and memory basically 
>in a nutshell.  There is nothing at all restricting its usage for 
>just 3D acceleration.  The Radeon and Rage 128 drivers both use 
>DRI for 2D acceleration as well if DRI is enabled.  Newer code in 
>the GATOS project also uses DRI for Xv IIRC.

It does, too bad that it is badly broke for at leat some Rage 128 based cards 
(like mine). Even worst is that non-drm Xv is also broke since 4.1 ! (see my 
previous posts on this).

And what is even worst is that there is no list of "known bugs and problems", 
if one wants to configure X for every machine then one must have a knowledge 
base of all specific card-drivers problems. Of course distros build this for 
internal use, but why isn't a public list available ? Smaller distros can't 
afford to own every revision of every chipset to build their own "known bugs  
and workarounds list". Am I wrong or XFree should publish one errata ? I can 
contribute with the problems I already detected if somone is willing to keep 
that online at xfree.org.


Best regards
Gustavo Homem

"Quero ser o presidente de um povo obediente" - poeta Manuel Jo�o

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