Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo <jag rabisco gmail com>]

Michael, is working fine! I've tested with and no rulers and the
performance is equal!
Thanks.


J. Americo Gobbo [Illustrator and Painter]
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On Sun, Sep 6, 2015 at 6:49 PM, Michael Henning <drawoc darkrefraction com>
wrote:

> Please update to latest gimp master and test. I think I fixed this.
>
> commit 3233a70bae756e8f62fb144cbce9d8f84ed25609
> Author: Michael Henning
> Date:   Sun Sep 6 00:05:32 2015 -0400
>
>     libgimpwidgets: Avoid updating the rulers too often.
>
>     Ever since 72617e42b, whenever the user generated a lot of mouse
>     input, we would constantly queue redraws to the rulers. These redraws
>     had a higher idle priority than updating the canvas, so we would
>     rarely get around to canvas updates, which made certain tools
>     (painting with dynamics, the blend tool) feel very unresponsive.
>
>     This fixes it by only redrawing the rulers if the mouse has moved
>     far from the last location, or if there are no idle handlers with
>     a priority above LOW.
>
> From,
>    drawoc
>
> On Sun, Sep 6, 2015 at 3:00 PM, Americo Gobbo <jag rabisco gmail com>
> wrote:
>
> > On Sun, Sep 6, 2015 at 3:04 PM, Richard <strata_ranger hotmail com>
> > wrote:
> >
> > > IIRC, this was previously discussed on the mailing list (and bugzilla)
> > > and the cairo library was identified as a culprit/accessory to the lag --
> > > as some users reported downgrading to a previous libcairo fixes the ruler
> > > lag.
> > >
> > > However, it also appears to have been properly fixed as of mid-August:
> > > https://bugzilla.gnome.org/show_bug.cgi?id=736411#c39
> > > <https://bugzilla.gnome.org/show_bug.cgi?id=736411>
> >
> > Thanks Richard, but it seems all OK are to windows... on my linux box the
> > problem is resolved only without rulers.
> >
> > I work only on linux, and in this box I've two GIMP, the stable 2.8.14
> > (otto ppa) and and the 2.9 devel (last git master). My box is ubuntu
> > gnome 14.04.2 - 64-bit. Memory 8Gb, Intel® Core™ i5-3570K CPU @ 3.40GHz ×
> > 4, Gallium 0.4 on AMD CAICOS.
> >
> > The 2.9 first of the patch of Michael Henning in August 11, was working
> > well with the rulers.
> > The 2.8.14 stable - ppa otto, is working well.
> >
> > git log on my 2.9 git master >
> >
> > commit 72617e42b426e6788c075539a20df7365d2cf102
> > Author: Michael Henning <drawoc darkrefraction com>
> > Date:   Tue Aug 11 16:20:59 2015 -0400
> >
> >     Bug 736411 - Ruler updates cause slowdown when painting
> >
> >     We now avoid drawing rulers in the position property setter and use
> >     gtk's region invalidation instead. Previously, we were basically
> >     redrawing the ruler inside the mouse event handler, which is pure
> > evil.
> >
> > thanks