[vtkusers] VTK 5.2 and 5.4 bug

[Anton Deguet]

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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>
>
>
> --
> François Bertel, PhD  | Kitware Inc. Suite 204
> 1 (518) 371 3971 x113 | 28 Corporate Drive
>                      | Clifton Park NY 12065, USA  
> _______________________________________________
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>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
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>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
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>
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