[vtk-developers] OpenGL backend - 1.1 vs 2.0

Ken Martin ken.martin at kitware.com
Wed May 10 11:01:11 EDT 2017


We need to detect insufficient OpenGL capabilities anyway (the current way
> of Paraview simply crashing when starting through RDP is just
> embarrassing). It should not be too difficult to add RDP connection
> termination and application restart there.
>
>
It should be graceful but it wasn't. This topic makes it so that VTK at
least can check and fail gracefully when running on RDP.

https://gitlab.kitware.com/vtk/vtk/merge_requests/2812



>
>
> After some more web search, it doesn’t seem to be possible to access the
> regular OpenGL context when an application started through RDP.
> Applications that need maximum compatibility include multiple rendering
> backends with dynamic switching (such as Qt 5 rendering engine, based on a
> run-time check at application startup) or static selection (e.g., 3D Studio
> Max). However, in the long term I would prefer seeing the VTK community
> spending time with developing new features than maintaining a legacy
> backend.
>
>
>
> Andras
>
>
>
> *From:* Ken Martin [mailto:ken.martin at kitware.com]
> *Sent:* Wednesday, May 10, 2017 9:51 AM
> *To:* Andras Lasso <lasso at queensu.ca>
> *Cc:* Vladimir Engelgardt <v.engelgardt at gmail.com>; VTK Developers <
> vtk-developers at vtk.org>
> *Subject:* Re: [vtk-developers] OpenGL backend - 1.1 vs 2.0
>
>
>
> Hmmm, maybe something like this
>
>
>
> https://social.technet.microsoft.com/Forums/windowsserver/en-US/c8295ef8-
> 3711-4576-9293-2c4965280165/opengl-and-remote-desktop?forum=winserverTS
>
>
>
> In your batch file make sure you reconnect your session to the physical
> console before attempting to launch the CAD app.  Here is the command:
>
> tscon 1 /dest:console
>
> I am thinking your batch file only needs two lines, something like:
>
> tscon 1 /dest:console
> start "C:\Program Files\SolidWorks Corp\SolidWorks\sldworks.exe"
>
> The first line will disconnect your remote PC and connect the session to
> the physical keyboard/video/mouse, then the second line will launch the CAD
> program (substitute your CAD software).  After that you wait several
> seconds for the software to start and then reconnect to the session from
> your home PC.
>
> You should have the batch file Run as administrator.  I made an assumption
> above that the current session id is 1.  Your session id may be
> different--you can use query session at a command prompt to find your
> session id.
>
>
>
> On Wed, May 10, 2017 at 9:40 AM, Andras Lasso <lasso at queensu.ca> wrote:
>
> VTK's OpenGL2 backend works very well through RDP - including volume
> rendering, even using a client without GPU. The only limitation (an
> important one) is that you have to start your application before connecting
> through RDP.
>
>
>
> The only thing to figure out is how to convince applications to start
> “normally” when connected through RDP.
>
>
>
> Andras
>
>
>
> *From:* vtk-developers [mailto:vtk-developers-bounces at vtk.org] *On Behalf
> Of *Ken Martin
> *Sent:* Wednesday, May 10, 2017 8:51 AM
> *To:* Vladimir Engelgardt <v.engelgardt at gmail.com>
> *Cc:* VTK Developers <vtk-developers at vtk.org>
> *Subject:* Re: [vtk-developers] OpenGL backend - 1.1 vs 2.0
>
>
>
> If you have to support RDP (as opposed to other solutions), and you have
> to support clients that lack a GPU etc, then you could build your
> application against Mesa (with OpenSWR or llvm as the renderer) and I
> believe it should work everywhere including RDP.
>
>
>
> Ideally at run time we could detect this and pick Mesa/Hardware but I
> don't think anyone has had time to dig into how difficult that would be.
>
>
>
> From what I could find nvidia only supports hardware RDP on their
> professional cards. It would certainly be nice if vendors would do what
> they can to support modern OpenGL more broadly in cases like this.
>
>
>
>
>
>
>
>
>
>
>
> On Wed, May 10, 2017 at 6:14 AM, Vladimir Engelgardt <
> v.engelgardt at gmail.com> wrote:
>
> Hi,
>
> Problem description: Application uses VTK 7.0 (OpenGL 2 module) for
> rendering on Windows platform. But the problem is, that OpenGL 2 has
> limited
> support over Microsoft's Remote Desktop. RDP is a must for our application
> (VNC, TeamViewer is not an option). On Win 10 there is an option called
> 'Use
> hardware drivers over RDP' and it works, but for limited set of video
> adapters - AMD, Integrated Graphics from Intel and NVIDIA (Tesla, Grid
> only).
>
> Is there any workaround for this problem, i.e. detect GL version at runtime
> and use 1.1 or 2.0? If no, we are going to switch for OpenGL 1.1.
>
> We concern about OpenGL 1.1 support in future versions of VTK. Is it going
> to be supported and how long?
>
> Best Regards,
> Vladimir.
>
>
>
> --
> View this message in context: http://vtk.1045678.n5.nabble.
> com/OpenGL-backend-1-1-vs-2-0-tp5743167.html
> Sent from the VTK - Dev mailing list archive at Nabble.com.
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>
>
> --
>
> Ken Martin PhD
>
> Distinguished Engineer
> Kitware Inc.
>
> 28 Corporate Drive
> Clifton Park NY 12065
>
>
>
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>
>
> --
>
> Ken Martin PhD
>
> Distinguished Engineer
> Kitware Inc.
>
> 28 Corporate Drive
> Clifton Park NY 12065
>
>
>
> This communication, including all attachments, contains confidential and
> legally privileged information, and it is intended only for the use of the
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-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065

This communication, including all attachments, contains confidential and
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