matplotlib-devel Mailing List for matplotlib

Hi,
I will be on vacation with limited email from July 14 to August 7, 2011.
Bonjour,
Je serai en conge du 14 juillet jusqu'au 7 aout, 2011.

On Wednesday, July 27, 2011, Nicolas Rougier <Nic...@in...>
wrote:
>
>
> Hi all,
>
> I've been testing various idea around the idea of a GL backend, and I
would have a few questions.
> First, I tried to use the backend template to quickly test an empty pyglet
backend and I've been quite surprised by the bad performances. Without
drawing anything, I can hardly reach 100FPS and I wonder if I did something
wrong ? (The backend is available backend_pyglet.py <
http://www.loria.fr/~rougier/tmp/backend_pyglet.py> and the test file is
at test_backend_pyglet.py <
http://www.loria.fr/~rougier/tmp/test_backend_pyglet.py>)
>
> Second, I've been experimenting with proper anti-alias technics (using
shaders) and the results are not so bad so far (IMHO) :
> Antialiased line with thickness varying by 0.1 pixels:
> http://www.loria.fr/~rougier/tmp/aa-line.png
> (don't paid attention to the cap, it's not done yet)
>
> Antialiased circles (small circles position is increased by 0.1 pixels)
> http://www.loria.fr/~rougier/tmp/aa-circle.png
> (I can post source code if anyone is interested)
> I don't know yet if all matplotlib artists can be drawing using these
technics.
>
> My question relates to the cairo backend that now seems to support gl and
shaders. Does anyone know the status of the gl-backend and how it would
improve performances of matplotlib ? (I had a hard time finding any
information).
>
> Nicolas
Nicolas,
I want to immediately encourage you to continue on your efforts. PLEASE
make a fork on github so that we may be able to experiment better.
Cheers!
Ben Root

Hi all,
I've been testing various idea around the idea of a GL backend, and I would have a few questions.
First, I tried to use the backend template to quickly test an empty pyglet backend and I've been quite surprised by the bad performances. Without drawing anything, I can hardly reach 100FPS and I wonder if I did something wrong ? (The backend is available backend_pyglet.py and the test file is at test_backend_pyglet.py)
Second, I've been experimenting with proper anti-alias technics (using shaders) and the results are not so bad so far (IMHO) :
Antialiased line with thickness varying by 0.1 pixels:
http://www.loria.fr/~rougier/tmp/aa-line.png
(don't paid attention to the cap, it's not done yet)
Antialiased circles (small circles position is increased by 0.1 pixels)
http://www.loria.fr/~rougier/tmp/aa-circle.png
(I can post source code if anyone is interested)
I don't know yet if all matplotlib artists can be drawing using these technics.
My question relates to the cairo backend that now seems to support gl and shaders. Does anyone know the status of the gl-backend and how it would improve performances of matplotlib ? (I had a hard time finding any information). 
Nicolas