[vtkusers] VTK 5.2 and 5.4 bug

Thu Apr 2 10:21:43 EDT 2009

Hi,

For Rolf:

If you want to perform offscreen rendering without X, you have to set
VTK_OPENGL_HAS_OSMESA to ON.

For Anton:

Regression tests are a good way to start:

VTK/Rendering/Testing/Cxx/TestOSConeCxx.cxx
VTK/Graphics/Testing/Tcl/OSCone.tcl

Note that arkadia is Ubuntu 8.10 with nVidia drivers 177.82 and an
nVidia GeForce 6800 and it works fine on it.

So run the test first

ctest -R TestOSConeCxx

and see if it fails for you.

On Thu, Apr 2, 2009 at 9:49 AM, Anton Deguet <anton.deguet at jhu.edu> wrote:
> I have a similar problem and haven't been able to find a concise how-to.  I
> understand that OS specific issues are hard to handle but it would be nice
> to know if off-screen rendering is possible or not on Linux and under which
> conditions.  A sample of code would be welcome.
>
> My setup, which I thinks is pretty classic, is:
> - Ubuntu 8.04
> - NVidia drivers
> - VTK 5.0, 5.2, 5.4
>
> All versions tested lead to a segmentation fault after an X11 message re. an
> invalid windon Id when off-screen rendering is set On.  The same code works
> on Mac OS and Windows but I need Linux.
>
> Anton
>
>
> ---
> Anton Deguet, Research Engineer, ERC-CISST/LCSR, Johns Hopkins University
> e-mail: anton.deguet at jhu.edu
> JHU, LCSR, CSEB 137b, 3400 North Charles Street, Baltimore, MD 21218, USA
>
>
>
>
> On Apr 2, 2009, at 7:45 AM, Rolf Anders Syvertsen wrote:
>
>> When I try to set the render offscreen value on, my linux computers gets a
>> segmentation fault. Works find on my windows computer.
>>
>> I need a way to be able to render without the screen (xwindows), need to
>> be able to render on my linux cluster, have loads of data that I need to
>> render. Is it possible to do this with VTK? Or do I need to find an other
>> way of doing this? Am a little feedup of messing with the !"well" documented
>> vtk.
>>
>>
>> -----Opprinnelig melding-----
>> Fra: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] På vegne
>> av Francois Bertel
>> Sendt: 31. mars 2009 15:43
>> Til: vtkusers at vtk.org
>> Emne: Re: [vtkusers] VTK 5.2 and 5.4 bug
>>
>> Hi,
>>
>> As mangle Mesa was pretty broken and there were other alternatives to
>> perform offscreen rendering, it was decided a long time ago to stop
>> maintaining  the vtkMesa* classes.
>>
>> The other alternatives for offscreen rendering are:
>> * if you have mesa compiled with offscreen and you set
>> VTK_OPENGL_HAS_OSMESA to ON during the VTK build and you set
>> OffScreenRendering ivar to on on the vtkWindow (superclass of
>> vtkXOpenGLRenderWindow), it will use it first.
>> * if not, if you graphics card support framebuffer object (FBO), it will
>> use it
>> * if not, if supported, if will use pbuffers (pixel buffers) (note:
>> this has nothing to do with pixel buffer objects (PBO) )
>> * if not, it will use pixmaps.
>>
>> On the VTK dashboard,
>> * arkadia.kitware covers offscreen with FBO
>> * hythloth.kitware covers Mesa
>> * dash16.kitware covers Mesa with VTK_OPENGL_HAS_OSMESA:BOOL=ON
>>
>>
>>
>> On Tue, Mar 31, 2009 at 4:01 AM, Rolf Anders Syvertsen
>> <Rolf.Anders.Syvertsen at rikshospitalet.no> wrote:
>>>
>>> The code will not compile with Mesa enabled. The Rendering/vtkMesa*.*
>>> files are old.  Where are the correct files? Has the Mesa part been
>>> forgotten? Is there an other way to run offscreen rendering on linux in
>>> the new versions?
>>> Did not work on linux on 5.2 by default with out mesa.
>>>
>>>
>>>
>>> Rolf Anders Syvertsen
>>> Software Developer
>>> IMI (Institute for Medical Informatics) Radiumhospitalet, Oslo
>>> Universitetssykehus HF
>>> email: rolf.anders.syvertsen at rikshospitalet.no
>>>
>>> Denne meldingen inneholder ikke sensitiv informasjon som bryter med
>>> Rikshospitalets krav til informasjonssikkerhet.
>>> (In compliance with the Security Policy of Rikshospitalet , the
>>> content of this message (including any attachments) is of a
>>> non-sensitive nature)
>>>
>>>
>>>
>>>
>>> _______________________________________________
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>>>
>>> Visit other Kitware open-source projects at
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>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
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>>
>>
>>
>> --
>> François Bertel, PhD  | Kitware Inc. Suite 204
>> 1 (518) 371 3971 x113 | 28 Corporate Drive
>>                     | Clifton Park NY 12065, USA
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>
>

-- 
François Bertel, PhD  | Kitware Inc. Suite 204
1 (518) 371 3971 x113 | 28 Corporate Drive
                      | Clifton Park NY 12065, USA