[Bf-committers] ati slow swap buffer perfomance

Ton Roosendaal ton at blender.org
Thu Sep 9 15:01:12 CEST 2004


I think you missed the release log for 2.34. The problem was located  
and found, which was switching all glFinish calls with glFlush. Please  
verify if it works for you!


On Thursday, Sep 9, 2004, at 11:13 Europe/Amsterdam, john tuffen wrote:

> Hi Tom,
>  ... well - as you pointed out - it was a while ago (against something  
> like
> v2.32?). I can take a look when I get home to where the code is  
> (was?). My
> quick hack basically involved removing all of the calls which switched  
> to the
> front buffer (thus drawing things to the back buffer), and adding  
> 'swapbuffers'
> calls at appropriate places to ensure the content was actually  
> displayed. As I
> say, this was a very quick hack, and made menus (in general all of the  
> UI
> interaction in fact) much more responsive. The down side was that all  
> of the
> calls to 'swapbuffers' caused much flickering in vertex-paint mode (on  
> my
> machine). Bringing the build to a different machine to test, I found  
> that all
> of the display flickered all of the time... not good at all.
> So, I was at the stage where what I actually wanted was a  
> 'swapbuffers' that
> only worked on small screen areas - or a different approach entirely.
> I'll see what code I can find at home, and email it later...
> cheers,
> john..
> --
> http://www.minimism.com/
> Quoting Tom Musgrove <tommusgrove__ at hotmail.com>:
>> In April and in June there was discussion regarding fixing the slow  
>> drawing
>> of menus for ATI cards..
>> Specifically John Tuffen had mentioned his personal progress in  
>> April, and
>> Ton had mentioned a discussion with Daniel on potential solutions.
>> http://www.blender.org/pipermail/bf-committers/2004-April/005784.html
>> http://www.blender.org/pipermail/bf-committers/2004-April/005791.html
>> http://www.blender.org/pipermail/bf-committers/2004-June/006450.html
>> Is there still a plan to fix this issue?
>> If not, if John is still around could I see your patch?
>> Thanks,
>> Tom M.
>> LetterRip
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Ton Roosendaal  Blender Foundation ton at blender.org  

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