[Bf-committers] ati slow swap buffer perfomance

john tuffen john at namke.com
Thu Sep 9 15:09:20 CEST 2004


no, this isn't the problem I encountered. I believe that fix was the 'gradual
slowdown' problem with ATI cards - the problem I (and many others) have is the
slow display of menus and GUI elements... it can take around 10 seconds to
display the 'file' menu for example.

I know that I could replace my graphics card, but I like my fanless dual head
ATI - it works fine for everything else...

john..

--

Quoting Ton Roosendaal <ton at blender.org>:

> Hi,
> 
> 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!
> 
> -Ton-
> 
> 
> 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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> > Bf-committers at projects.blender.org
> > http://projects.blender.org/mailman/listinfo/bf-committers
> >
> >
> ------------------------------------------------------------------------ 
> --
> Ton Roosendaal  Blender Foundation ton at blender.org  
> http://www.blender.org
> 
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