[Paraview-developers] pvpython and force_offscreen_rendering on OS X

[Sebastien Jourdain]

Visualizer is another one https://github.com/kitware/visualizer.

Ok so the issue is that you are using the latest version of light-viz with
an older version of ParaView.
So to use light-viz with your ParaView 5.4.1 you will need to use the
version 1.16.5 instead of 1.17.+.

But the version of ParaView that you download from our web site already
embed both Visualizer and LightViz that would work with it. Just at the
package content.
=> https://kitware.github.io/paraviewweb/docs/architecture.html#Simplicity

Regarding the offscreen part. If it is just for development you should skip
that part or use a more recent ParaView to have that
--force-offscreen-rendering.
The new infrastructure is so much better specially on Mac where before it
was buggy.

You can download the latest ParaView with both light-viz and visualizer
here: https://www.paraview.org/download/
Then change the version to "Nightly".

Seb


On Thu, Jan 25, 2018 at 6:40 AM, Sgouros, Thomas <thomas_sgouros at brown.edu>
wrote:

> Thank you, it would be lovely if you could check on that. From what I
> could read, the application I need to develop is probably only close to
> light-viz, but I figured that inspecting it and the infrastructure it sits
> on would be a good start. Please let me know how to get at a working
> version once you check it out.
>
> Incidentally, my goal is to create a web application with only a handful
> of visualization options for a fairly specific class of data. Light-viz is
> probably overkill, even if its description seemed fairly simple. If there's
> a better example I could start with for working with paraviewweb, I'd love
> to know what it is.
>
> Thank you!
>
>  -Tom
>
> On Wed, Jan 24, 2018 at 10:57 PM, Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> I saw you were trying to use light-viz which has some code to force the
>> offscreen rendering. But with the latest version of Paraview the way
>> offscreen rendering works has changed and I’m not sure (can’t remember), if
>> we updated light-viz to properly enable offscreen with the latest paraview.
>> It is easy to fix, but I guess, I’ll have to look and maybe push a new
>> version.
>>
>> Otherwise you should be able to use the binary distribution of ParaView
>> without building it.
>>
>> Seb
>>
>> On Jan 24, 2018, at 19:53, Sgouros, Thomas <thomas_sgouros at brown.edu>
>> wrote:
>>
>> Sure, I didn't mean to seem accusatory. I have to develop a paraviewweb
>> application and want to see if I could set up a prototype paraview server
>> on my (mac) laptop for the convenience of developing. If I can't, I can't,
>> but the text seemed to imply there was a possibility so I soldiered on
>> until I got stuck.
>>
>> Thank you,
>>
>>  -Tom
>>
>> On Wed, Jan 24, 2018 at 4:47 PM, Utkarsh Ayachit <
>> utkarsh.ayachit at kitware.com> wrote:
>>
>>> Tom,
>>>
>>> The page also says:
>>>
>>> "In this page, we limit ourselves to a Linux-based system. On Windows
>>> and macOS, offscreen support is available, but true headless operation
>>> is currently not widely used and hence left out of this discussion."
>>>
>>> Thus, the page is mostly for Linux where people have options of using X
>>> or not.
>>>
>>> Utkarsh
>>>
>>>
>>> On Wed, Jan 24, 2018 at 4:23 PM, Sgouros, Thomas
>>> <thomas_sgouros at brown.edu> wrote:
>>> > On this page:
>>> > https://www.paraview.org/ParaView/Doc/Nightly/www/cxx-doc/Of
>>> fscreen.html
>>> >
>>> > There is this note:
>>> >
>>> > Currently, ParaView supports two distinct APIs that are available for
>>> > headless operation: EGL and OSMesa (also called Offscreen Mesa). It
>>> must be
>>> > noted that headless support is a rapidly evolving area and changes are
>>> > expected in coming months. Modern H/W OpenGL implementations support
>>> EGL
>>> > while S/W (or Mesa) supports OSMesa. One has to build ParaView with
>>> specific
>>> > CMake flags changed to enable either of these APIs. Which headless API
>>> you
>>> > choose in your build depends on which OpenGL implementation you plan
>>> to use.
>>> >
>>> > I thought this meant I should try to build Paraview from source. My
>>> original
>>> > question had a second part about why my build wasn't working, but I'd
>>> also
>>> > add that it's not clear how to find the OSMesa option through the
>>> superbuild
>>> > process, either.
>>> >
>>> > Thank you,
>>> >
>>> >  -Tom
>>> >
>>> >
>>> > On Wed, Jan 24, 2018 at 4:16 PM, Utkarsh Ayachit
>>> > <utkarsh.ayachit at kitware.com> wrote:
>>> >>
>>> >> Okay, I misspoke again :). pvpython should indeed have this command
>>> >> line option. Maybe someone with access to a mac can see why this isn't
>>> >> working. I can try out on my home mac later tonight and get back to
>>> >> you if no one responds before then.
>>> >>
>>> >> On Wed, Jan 24, 2018 at 4:07 PM, Sgouros, Thomas
>>> >> <thomas_sgouros at brown.edu> wrote:
>>> >> > Thank you. I'm chasing this issue, actually. Perhaps I've
>>> misdiagnosed
>>> >> > it?
>>> >> >
>>> >> > $ LightViz --paraview /Applications/ParaView-5.4.1.app --data
>>> >> > ../mat-viz-mofTFF-90L-9.1lpm-100rpm
>>> >> >
>>> >> >
>>> >> >
>>> >> > ============================================================
>>> ===================
>>> >> >
>>> >> > | Execute:
>>> >> >
>>> >> > | $ "/Applications/ParaView-5.4.1.app/Contents/bin/pvpython"
>>> >> >
>>> >> > | -dr
>>> >> >
>>> >> > | --force-offscreen-rendering
>>> >> >
>>> >> > | "/usr/local/lib/node_modules/light-viz/server/pvw-light-viz.py"
>>> >> >
>>> >> > | --content
>>> >> >
>>> >> > | "/usr/local/lib/node_modules/light-viz/dist"
>>> >> >
>>> >> > | --port
>>> >> >
>>> >> > | 8080
>>> >> >
>>> >> > | --data
>>> >> >
>>> >> > | "../mat-viz-mofTFF-90L-9.1lpm-100rpm"
>>> >> >
>>> >> >
>>> >> > ============================================================
>>> ===================
>>> >> >
>>> >> >
>>> >> > Got unknown argument: --force-offscreen-rendering
>>> >> >
>>> >> >
>>> >> >
>>> >> >
>>> >> >
>>> >> > On Wed, Jan 24, 2018 at 4:02 PM, Utkarsh Ayachit
>>> >> > <utkarsh.ayachit at kitware.com> wrote:
>>> >> >>
>>> >> >> I misspoke. Not pvpython, the option is only available for
>>> pvserver,
>>> >> >> pvbatch and not pvpython.
>>> >> >>
>>> >> >> No, XQuartz is not it. If you're logged in, you have access to the
>>> >> >> Cocoa
>>> >> >> server.
>>> >> >>
>>> >> >> On Wed, Jan 24, 2018 at 3:58 PM, Sgouros, Thomas
>>> >> >> <thomas_sgouros at brown.edu> wrote:
>>> >> >> > $ /Applications/ParaView-5.4.1.app/Contents/bin/pvpython
>>> >> >> > --force-offscreen-rendering
>>> >> >> > Got unknown argument: --force-offscreen-rendering
>>> >> >> >
>>> >> >> > What does "access to Cocoa" mean in this context? How would I go
>>> >> >> > about
>>> >> >> > giving it that access? All I could think of was to run the
>>> XQuartz
>>> >> >> > server at
>>> >> >> > the same time, but I don't see any way to tell pvpython to look
>>> >> >> > there.
>>> >> >> >
>>> >> >> > Thank you,
>>> >> >> >
>>> >> >> >  -Tom
>>> >> >> >
>>> >> >> > On Wed, Jan 24, 2018 at 3:36 PM, Utkarsh Ayachit
>>> >> >> > <utkarsh.ayachit at kitware.com> wrote:
>>> >> >> >>
>>> >> >> >> You can use `--force-offscreen-rendering` flag for standard
>>> ParaView
>>> >> >> >> builds on OsX when using pvpython/pvserver etc. It simply
>>> implies
>>> >> >> >> that
>>> >> >> >> there'll be no windows popped up for these command line
>>> executables.
>>> >> >> >> Note, ParaView still needs access to Cocoa to create OpenGL
>>> contexts
>>> >> >> >> for rendering.
>>> >> >> >>
>>> >> >> >> Utkarsh
>>> >> >> >>
>>> >> >> >> On Wed, Jan 24, 2018 at 3:02 PM, Sgouros, Thomas
>>> >> >> >> <thomas_sgouros at brown.edu> wrote:
>>> >> >> >> > Hello:
>>> >> >> >> >
>>> >> >> >> > The documentation seems ambiguous on the point, can anyone
>>> confirm
>>> >> >> >> > for
>>> >> >> >> > me
>>> >> >> >> > how to get a version of pvpython that runs on OS X and
>>> supports
>>> >> >> >> > the
>>> >> >> >> > --force-offscreen-rendering option?
>>> >> >> >> >
>>> >> >> >> > My reading seems to imply that I will have to compile from the
>>> >> >> >> > source,
>>> >> >> >> > but
>>> >> >> >> > I've been trying and failing to understand how to make the
>>> >> >> >> > super-build
>>> >> >> >> > process work. If someone can confirm for me that this is the
>>> way
>>> >> >> >> > forward,
>>> >> >> >> > I'd appreciate it.
>>> >> >> >> >
>>> >> >> >> > Also, when using the paraview-superbuild, when I try to
>>> install, I
>>> >> >> >> > get
>>> >> >> >> > this:
>>> >> >> >> >
>>> >> >> >> > CMake Error at
>>> >> >> >> > /../paraview-superbuild/projects/apple/paraview.bundle.cmake
>>> :8
>>> >> >> >> > (message):
>>> >> >> >> >
>>> >> >> >> >   Creating the Apple package without the GUI is not supported.
>>> >> >> >> >
>>> >> >> >> > To which superbuild option does this refer?
>>> >> >> >> >
>>> >> >> >> > Thank you,
>>> >> >> >> >
>>> >> >> >> >  -Tom
>>> >> >> >> >
>>> >> >> >> >
>>> >> >> >> > _______________________________________________
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>>> >
>>> >
>>>
>>
>>
>
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