[Paraview] [Non-DoD Source] Re: 5.0.1/Exodus Reader (UNCLASSIFIED)

[Hennessey, Joseph G CTR USARMY RDECOM ARL (US)]

CLASSIFICATION: UNCLASSIFIED

Utkarsh,

I have rebuilt osmesa using mesa 11.2.2 but
it ParaView rebuilt with the new version is giving
me the same error as before, complaining that the
GL version 2.1 with gpu_shader4 extension is not
Supported.

I think I know  why  this is occurring and I wondered if you
could confirm this for me.

I configured mesa with these parameters

./configure \
    --disable-xvmc \
    --disable-glx \
    --disable-dri \
    --with-dri-drivers= \
    --with-gallium-drivers=swrast \
    --enable-texture-float \
    --disable-egl \
    --with-egl-platforms= \
    --enable-gallium-osmesa \
    --enable-gallium-llvm=yes \
    --prefix=<install prefix>

but, I did not have a version of llvm available
and the configure script then set

Llvm = no

>From my reading of this webpage

http://www.paraview.org/Wiki/ParaView/ParaView_And_Mesa_3D

It seems that without gallium-llvm,
the version of OpenGL built reverts to an older version,
which I believe is why I am still getting the error.

Would you agree with this?

Thanks,

Joe

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Joseph G. Hennessey Ph.D., Lockheed Martin
Army Research Lab
DOD Supercomputing Resource Center


-----Original Message-----
From: Utkarsh Ayachit [mailto:utkarsh.ayachit at kitware.com]
Sent: Thursday, June 02, 2016 4:19 PM
To: Hennessey, Joseph G CTR USARMY RDECOM ARL (US) 
<joseph.g.hennessey2.ctr at mail.mil>
Cc: Angelini, Richard C (Rick) CIV USARMY RDECOM ARL (US) 
<richard.c.angelini.civ at mail.mil>; Su, Simon M CIV USARMY RDECOM ARL (US) 
<simon.m.su.civ at mail.mil>; ParaView <paraview at paraview.org>
Subject: Re: [Paraview] [Non-DoD Source] Re: 5.0.1/Exodus Reader 
(UNCLASSIFIED)

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----

> And I have tried replacing the library
> lib/paraview-5.0/libOSMesa.so.7
> with both libOSMesa.so from 11.1.2 and 11.2.2 and they are both still
> giving the same error

Simply swapping the libraries won't work. Mesa 11.2 [1] added new API
OSMesaCreateContextAttribs() which is needed to create correct OpenGL context. 
The API is used at compile time if appropriate osmesa.h is being used.

You can try to update Projects/unix/osmesa.cmake in the superbuild source to 
use the configure arguments you used, and also change versions.cmake in the 
same repo to point to change the osmesa source tar ball to be 11.2. Now the 
superbuid will build 11.2 instead and it should then have the new API 
available.

[1] Caution-http://www.mesa3d.org/relnotes/11.2.0.html


CLASSIFICATION: UNCLASSIFIED
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