[vtkusers] hardware accelerated offscreen rendering without diplaying window

[Aashish Chaudhary]

Hi,

On Tue, Jul 26, 2011 at 9:03 AM, Adriano Gagliardi <agagliardi at ara.co.uk> wrote:
>
> There is a patch that essentially comments out the lines of code that cause
> the X-window to pop up. I've been using it for a couple of years without
> issue:

I am wondering if people are using this patch and if it is working
then we should get this into VTK proper. I think I am volunteering
myself.

Though we have to make sure all our dashboards will pass this patch as well.

Thanks,

>
> http://www.cmake.org/pipermail/paraview/2009-December/014908.html
>
> That should have the attachement on it (HideWindow.patch).
>
> Thanks,
>
> Adriano
>
>
> ===================================
>
> Adriano Gagliardi MEng PhD
> Business Sector Leader
> Computational Aerodynamics
> Aircraft Research Association Ltd.
> Manton Lane
> Bedford
>
> Tel: 01234 32 4644
> E-mail: agagliardi at ara.co.uk
> Url: www.ara.co.uk
> -----Original Message-----
> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf
> Of Peter Schiemann
> Sent: 26 July 2011 13:47
> To: vtkusers at vtk.org
> Subject: Re: [vtkusers] hardware accelerated offscreen rendering without
> diplaying window
>
> Hello Victor,
> with VTK you only have the choice of either accelerated rendering on a
> physical display or software rendering which can be off screen. There has
> been no attempt to support pure off screen with hardware support for several
> years. As you say, the best alternative is Visit. What you need works out of
> the box.
> If you need a solution in VTK, study the class vtkXOpenGLRenderWindow.cxx
> and find out why it pops up an unnecessary window although set to offscreen.
> I was told it is not difficult, but I am not familiar with X windows
> programming.
>
> Good luck!
> Peter
>
>
>>Dear VTK gurus!
>>
>>I was wondering about the status of hardware accelerated offscreen
> rendering in VTK *without* displaying an X window on the server (linux
> operating systems).
>>
>>If this is possible, can somebody please document the CMake settings and a
> usage example in the VTK Wiki?
>>
>>There have been several discussion threads on this issue, but I found
>>no solution. They all gave up at some point. I guess
>>http://www.vtk.org/Wiki/VTK/Examples
>>/Cxx/Utilities/OffScreenRendering is the "official" example, how to render
> offscreen. But unless compiled with software rendering, it still displays an
> X window.
>>
>>If this is impossible with VTK, why?? VisIt is capable of hidden,
> accelerated offscreen rendering. SoQt can easily do it, too.
>>Is VTK designed differently, so that use of modern pbuffers or frame buffer
> objects is excluded? Then please say so, and people can make their choice.
>>
>>Thank you
>>Vic
>
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-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com