[vtkusers] Re: MangledMesa & VTK

[Berk Geveci]

I haven't looked at/used mangled mesa in a while. I used to enable it
on all my builds for testing but eventually gave it up. As Brian
mentioned, having a separate mesa build is more practical. There are
two maintenance issues with mangled mesa: 1. mangling support in the
mesa library itself, 2. mangled mesa support in VTK. (2) is not too
much of a burden although as Randall found out, it is not being tested
(therefore it may be considered broken). (1) is more of a problem
since Mesa folks are not really interested in it and do not test
mangled mesa. The last time I tried, the latest mesa could not be
built mangled. I think there are some users of mangled mesa out there
but I am not sure how many. Jeff Lee may be one of them.

-berk

On 1/2/07, Moreland, Kenneth <kmorel at sandia.gov> wrote:
>
>
>
> I'm pretty sure the current use of this feature at Sandia is zero.  All of
> our distributions of ParaView use either a hardware driver or straight Mesa,
> not both.  As several other members of these lists have just testified, it's
> much easier.
>
> Concerning the maintenance overhead of maintaining the mangled Mesa stuff, I
> would rather have someone from Kitware speak to that since they are really
> the ones doing that.  I recall Berk grumbling about it in the past.  Perhaps
> he can elaborate.
>
> I also cannot speak for any other organizations that may be using
> VTK/ParaView.  If any of you out there use the vtkMesa* classes or otherwise
> compile with the mangled Mesa features, now would be a really good time to
> chime in.
>
> -Ken
>
>  ________________________________
>  From: paraview-bounces+kmorel=sandia.gov at paraview.org on behalf of James P.
> Ahrens
> Sent: Sat 12/30/2006 4:35 PM
> To: paraview at paraview.org
> Cc: ahrens at lanl.gov
> Subject: [Paraview] Re: ParaView Digest, Vol 32, Issue 23
>
>
>
>
> > Message: 1
> > Date: Fri, 29 Dec 2006 09:05:35 -0600
> > From: "Randall Hand" <randall.hand at gmail.com>
> > Subject: Re: [Paraview] RE: [vtkusers] MangledMesa & VTK
> > To: "Sean Ziegeler" <seanzig at users.sourceforge.net>
> > Cc: paraview-developers at public.kitware.com, VTK Users
> >       <vtkusers at vtk.org>,     paraview at paraview.org
> > Message-ID:
> >
> <b02264720612290705h54bc20a6yf45d6b335f1f644e at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> > >
> > So maybe mangling isn't really necessary anymore, except for those times
> > where you need to switch between Hardware OpengL & Mesa on the fly..
> > Anyone
> > actually doing that tho?
> >
>
> The original purpose of the mangled mesa extension was a heterogeneous
> configuration with hardware acceleration and OS rendering at the same
> time. It was a long time ago, so I've forgotten the exact configuration. I
> know SGI pipes were part of the mix. This was in the parallel VTK days;
> ParaView did not exist, therefore no client/server architecture etc...
>
> One application is rendering extremely large offscreen imagery using
> mangled Mesa (limited by memory)  and hardware accelerated rendering
> smaller imagery for onscreen interactive use. This requires both libraries
> in the same executable.
>
> Brian, what is the maintainence issue? What is the current cost etc.?
>
> --Jim
>
>
>
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>


-- 
 Berk Geveci
 Kitware Inc.
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 Clifton Park, NY, 12309