[Paraview-developers] [EXTERNAL] Re: osmesa version of ParaView

[Ken Martin]

The remote Linux box does not allow a GLX context at all? or it does now
allow forwarding of a GLX context? or maybe it doesn't have a local xserver
running at all.

The same strategy with EGL might work too. Create an EGL OpenGL renderer,
copy the resulting images to the forwarded xwindow.

Having osmesa built in as well would be a great backup, I just thought
there were challenges with that. But maybe they have been fixed. That
approach would also end up rendering and then copying to a remoted Xwindow.
So all three approaches share the same basic last step of take an image in
memory and copy to an xwindow.




On Wed, Nov 30, 2016 at 5:58 PM, Scott, W Alan <wascott at sandia.gov> wrote:

> So, just to be really clear (I got a bit confused here…) I am on a Linux
> box, such as my local blade or Linux workstation.  I want to test a remote
> Paraview install, or my data is on a remote Linux server (and I want to run
> a standalone version of ParaView).  I want to do the following:
>
>
>
> ssh -X (or ssh -Y)
>
> paraview –magicFlagsGoHere
>
>
>
> and it just works on a remote Linux box that does not allow a GLX context.
>
>
>
> Thanks,
>
>
>
> alan
>
>
>
> *From:* Ken Martin [mailto:ken.martin at kitware.com]
> *Sent:* Tuesday, November 29, 2016 2:32 PM
> *To:* Scott, W Alan <wascott at sandia.gov>
> *Cc:* paraview-developers at paraview.org
> *Subject:* [EXTERNAL] Re: [Paraview-developers] osmesa version of ParaView
>
>
>
> Couple quick thoughts
>
>
>
> If we can connect to the remote display using GLX (but not forwarded) then
> we can render remotely (offscreen but using normal OpenGL) and then copy
> the result to an Xwindow which is forwarded to a local machine. Sort of a
> RenderingDisplay=:0.0 Display=:1.0 where 1.0 is the forwarded one.
>
>
>
> I recall there being an issue with osmesa and accelerated opengl in the
> same binary but I have very limited experience with it.
>
>
>
>
>
> On Tue, Nov 29, 2016 at 3:39 PM, Scott, W Alan <wascott at sandia.gov> wrote:
>
> Cory/ Utkarsh/ Guys,
>
> I think we need to be able to build an osmesa version of ParaView, and we
> need this rendering option as a command line option for all Kitware Linux
> downloads.  The reason is that the next version of Redhat – RHEL 7 will no
> longer allow the forwarding of GLX contexts.  Thus, to be able to X forward
> ParaView back to a local computer, we will need to render into only an X
> window.  This is already giving us issues at Sandia with new Linux installs.
>
>
>
> Is this possible?  How hard will it be?  Any ideas on schedule?
>
>
>
> Before I write this up as a bug, I figured I would see what type of
> discussion we get in this thread.
>
>
>
> Thanks,
>
>
>
> Alan
>
>
>
> --------------------------------------------------------
>
> W. Alan Scott
>
> ParaView Support Manager
>
>
>
> SAIC
>
> Sandia National Laboratories, MS 0822
>
> Org 9326 - Building 880 A1-K
>
> (505) 284-0932   FAX (505) 284-5619
>
> ---------------------------------------------------------
>
>
>
>
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> --
>
> Ken Martin PhD
>
> Chairman & CFO
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
> 518 371 3971
>
>
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

This communication, including all attachments, contains confidential and
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