Re: Correct use of pixbuf, pixmap, and image?

[Ari Jolma <ari jolma tkk fi>]

Ari Jolma wrote:

> > > looking at process info, it seems that X is piling up memory, the code
> > >    $self->{pixmap} = $self->{pixbuf}->render_pixmap_and_mask;
> > >    $self->{image}->set_from_pixmap($self->{pixmap});
> > >   
>
> I've still seem to have a problem with this. I did a bit of research 
> and it seems that GtkImage's set_from_pixmap increases the ref_count 
> of the pixmap, thus the pixmap ends up with two ref_count two (I build 
> NOISY Glib to confirm this) and thus X does not free its memory.
>
> Is there a way to unset the pixmap from the image or force the 
> destroying of the pixmap? Recreating the image at this point in code 
> does not work right away.


Sorry for flooding. I tested a simple xs function which is essentially this:

while (object->ref_count > 1) {
        g_object_unref (object);
}


which I call with pixmap once I'm sure it is not used any more (after 
new one is created and set to the image). The while is needed because 
set_from_pixmap might be called several times to refresh the image on 
the screen. After using this the X server does not pile up memory any more.

I could not find any example where pixmap is used this way as an 
offscreen drawable.

> Ari
>
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