[vtkusers] hardware acceleratec OpenGL on Raspberry pi 3/Raspbian?

Wed Apr 20 11:56:12 EDT 2016

of course, sorry for not noticing the sync issue:

pi at raspberrypi:/dev $ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
2613 frames in 5.0 seconds = 522.544 FPS
2731 frames in 5.0 seconds = 546.007 FPS
2583 frames in 5.0 seconds = 516.513 FPS
2648 frames in 5.0 seconds = 529.468 FPS
2518 frames in 5.0 seconds = 503.535 FPS
3206 frames in 5.0 seconds = 640.964 FPS
2533 frames in 5.0 seconds = 506.589 FPS
2530 frames in 5.0 seconds = 505.956 FPS
2700 frames in 5.0 seconds = 539.864 FPS

On Wed, Apr 20, 2016 at 8:50 AM, Jose Paulo Moitinho de Almeida <
moitinho at civil.ist.utl.pt> wrote:

>
> Can you please post the "FPS" that you obtain without limiting the
> framerate?
>
> Using bash the command is
> "vblank_mode=0 glxgears"
>
> Thanks
>
> ZP
>
> On Tuesday 19 April 2016 23:01:43 Elvis Chen wrote:
> > hi all,
> >
> > This is a status update on vtk on Raspberry pi, with hardware accelerated
> > OpenGL.
> >
> > After a few days of trial and error, I managed to get VTK working on
> > Raspberry Pi 3. I hope my experience can save others some time, as
> > information on the web can be misleading.
> >
> > First of, I am using Raspberry Pi 3.  The DOs and DONTs
> >
> > DO:
> > - make sure you use the official PSU (rated at 2.5A), as there are
> reports
> > that an under-powered PI causes OpenGL driver to fail,
> >
> > DONTs:
> > - don't use the official 7" touch screen. The OpenGL driver apparently is
> > very picky on the output format. It won't work with the 7" touch screen
> > - don't follow the instruction on
> > https://www.raspberrypi.org/blog/another-new-raspbian-release/, in
> > particular DO NOT UPGRADE Raspbian.
> >
> > Here is what I had to do to get hardware accelerated OpenGL to work:
> >
> > - create a new raspbian/Jessie bootdisk using 2016-03-18 image
> > - upon first boot, which boots into X by default, expand the file system
> > using Menu->Preference->Raspberry Pi Configuration. Reboot
> > - upon 2nd boot, change keyboard/time-zone as desired. Using the same
> > configuration utility as the previous step, change the boot option to "To
> > CLI" instead of "To Desktop". Reboot.
> > - now raspbian will boot into commandline instead of X. Issue the
> following
> > command:
> >      sudo raspi-config
> >      - under Advanced Options, Enable OpenGL driver, reboot
> > - once rebooted, issue "startx"
> > - open a terminal, issue the following command
> >      sudo apt-get update
> >      sudo apt-get install libvtk5-qt4-dev cmake cmake-curses-gui
> mesa-utils
> >
> > I choose vtk5 but vtk6 is also available as a pre-compiled package.
> >
> > - with mesa-utils installed, you can run glxgears to test opengl. I am
> > getting 59FPS on RPi3
> >
> > pi at raspberrypi:~/research/bin/vtkViewPolyDataMesh $ glxgears
> > Running synchronized to the vertical refresh.  The framerate should be
> > approximately the same as the monitor refresh rate.
> > 293 frames in 5.0 seconds = 58.548 FPS
> > 301 frames in 5.0 seconds = 59.994 FPS
> > 299 frames in 5.0 seconds = 59.613 FPS
> > 290 frames in 5.0 seconds = 57.999 FPS
> > 300 frames in 5.0 seconds = 59.807 FPS
> > 300 frames in 5.0 seconds = 59.995 FPS
> >
> >
> > - I have compiled my own VTK program that displays a vtkpolydata and it
> > runs well. I'll be making a video and post it online in a few days.
> >
> > Again, please not that while I "updated" the apt packages, I NEVER
> > "upgraded" any. I needed to "update" in order to install additional
> > programs, but an "upgrade" will brake the OpenGL driver.
> >
> > Hope this helps
> >
> > --
> > Elvis C.S. Chen, PhD
> >
> > Imaging, Robarts Research Institute
> > Department of Electrical & Computer Engineering
> > Biomedical Engineering
> > Medical Biophysics, Western University
> > London, Ontario, Canada
> >
> > On Sat, Apr 16, 2016 at 8:36 PM, David Gobbi <david.gobbi at gmail.com>
> wrote:
> > > Hi Elvis,
> > >
> > > One way of checking the OpenGL driver is the "glxinfo" command.
> > > The "OpenGL renderer" is usually Mesa if it is a software renderer,
> > > but if it gives the name of a specific card or chip, then you probably
> > > have hardware rendering, e.g. here's what my laptop reports:
> > >
> > > OpenGL vendor string: NVIDIA Corporation
> > > OpenGL renderer string: NVIDIA GeForce 9400M OpenGL Engine
> > > OpenGL version string: 2.1 NVIDIA-8.24.17 310.90.9.05f01
> > > OpenGL shading language version string: 1.20
> > >
> > > I don't know much about the Raspberry Pi, but google found this
> > > page that describes how to enable hardware OpenGL:
> > > https://www.raspberrypi.org/blog/another-new-raspbian-release/
> > >
> > >  - David
> > >
> > > On Sat, Apr 16, 2016 at 6:06 PM, Elvis Chen <elvis.chen at gmail.com>
> wrote:
> > >> Greetings,
> > >>
> > >> I've recently acquired a Raspberry Pi 3. To my surprise, the latest
> > >> raspbian (Jessie) comes with a complete development environment,
> > >> including
> > >> gcc (4.9), cmake, and vtk (both vtk5 and vtk6).
> > >>
> > >> I wrote a small program that reads a polydata and display it as a test
> > >> bed. The pipeline is:
> > >>
> > >> vtkpolydatareader->vtkpolydatamapper->vtkactor
> > >>
> > >> nothing fancy.
> > >>
> > >> However, the rendering is surprisingly SLOW. It looks if the graphics
> is
> > >> not hardware accelerated.
> > >>
> > >> My questions are:
> > >>
> > >> 1) How do I check if the video (which I assume to be OpenGL) is
> hardware
> > >> accelerated?
> > >> 2) any suggestion on how to optimize the performance?
> > >>
> > >> My next step is to comple vtk myself to see if it makes any
> difference.
> > >>
> > >> any help is very much appreciated,
>
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