Re: [matplotlib-devel] [PATCH] gtkagg backend leaks gc's.

[Benjamin R. <ben...@ou...>]

On Thursday, November 8, 2012, Carl Michal wrote:

> Hello,
>
> I noticed that a program I had that uses canvas.blit() to do animated
> graphs
> with the gtkagg backend was leaking memory.
>
> I tracked this down to gtk gc's being allocated in agg_to_gtk_drawable with
> gdk_gc_new(), but never being destroyed.
>
> The leak can be seen using the 'Animating selected plot elements' example
> from:
>
> http://www.scipy.org/Cookbook/Matplotlib/Animations
>
> (if it is modified to run forever, rather than just 50 plots and also
> changing numerix to numpy). After a few minutes, it is clear from ps that
> the
> memory usage is slowly but steadily climbing.
>
> Patch below (against matplotlib-1.1.1.) fixes it.
>
> Carl
>
> --- _gtkagg.cpp~        2012-06-30 12:37:00.000000000 -0700
> +++ _gtkagg.cpp 2012-11-08 14:30:23.000000000 -0800
> @@ -121,6 +121,7 @@
>                                   destbuffer,
>                                   deststride);
>
> +       gdk_gc_destroy(gc);
>             if (needfree)
>             {
>                 delete [] destbuffer;
>
>
>
>
If you are willing, would you like to file a PR against the v1.2.x branch?

Ben Root