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

[David Gobbi]

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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