[vtk-developers] OpenGL Extension loading with OSMesa?

[burlen]

done, thanks!

On 04/17/2013 10:23 AM, Utkarsh Ayachit wrote:
> Thanks for the dashboard, Kevin. Burlen, your changes seem reasonable
> to me. The commit for that change is posted below. After looking at
> the commit log and the change, I think it would make sense to not do
> the "workaround" when using Mesa. I'm going to approve the topic. Feel
> free to merge.
>
> Utkarsh
>
> commit d64cfbc286c7e5e51ac7ccaa3669ab02a9999b92
> Author: François Bertel <francois.bertel at kitware.com>
> Date:   Tue May 11 09:35:22 2010 -0400
>
>      BUG:10621 Workaround for an nVidia bug in X11 indirect rendering mode.
>
>      The version reported by the driver in X11 indirect rendering mode
> is above what
>      the driver can do (for example it tells it supports 2.1 (Xserver on GeForce
>      6800) or even 3.2 (Xserver on Quadro FX 3600M)) when it cannot
> actually support
>      PBO (pixel buffer objects) which is core in 2.1. It does not
> advertise PBO as
>      an extension. The workaround makes vtkOpenGLExtensionManager
> returns false in
>      indirect mode for any requested OpenGL version, which let the algorithms to
>      only tests against advertised extensions.
>
>      It has been tested with nVidia driver 195.36.15 (shipped with Ubuntu 10.04).
>
>
>
> On Wed, Apr 17, 2013 at 12:22 PM, Kevin H. Hobbs <hobbsk at ohio.edu> wrote:
>> On 04/17/2013 11:30 AM, burlen wrote:
>>> Hi Utkarsh,
>>>
>>> It's almost working, there's a test in the extension manager that always
>>> fails when using software rendering, for OS Mesa tests for any and all
>>> extensions fail weather they're actually support or not. The comment on
>>> this test says it has to do with nvidia driver over ssh -X and mentions
>>> a ParaView bug but doesn't say which one. Are you familiar with that
>>> issue? Although nvidia is mentioned the comment, the test doesn't
>>> differentiate between nvidia and other vendors.  I pushed a patch on
>>> Gerrit that lets OS Mesa report it's true
>>> capabilities(http://review.source.kitware.com/#/c/10927/). Could you
>>> take a look?
>>>
>> This build uses the patch and OSMesa :
>>
>> http://open.cdash.org/buildSummary.php?buildid=2878607
>>
>> and has OpenGL 2.1 features.
>>