Re: [Gimp-developer] How to retrieve the monitor profile from inside a plug-in

[C R <cajhne gmail com>]

This is fantastic! I could see this become my preferred way to use GIMP.
G'MIC works like a charm, can't make it break. Used a 2000x2000 test image,
and it just flies!
Well done, and thanks!

-C

On Tue, Sep 6, 2016 at 7:13 PM, Carmelo DrRaw <aferrero1975 gmail com>
wrote:

> Thanks, it worked!!!
>
> The only part which is still missing is the tracking of monitor changes.
>
> I have prepared a special GIMP AppImage with the patched gmic plug-in, if
> anyone is interested to test it and give some feedback:
> https://www.dropbox.com/s/xfo6okeqhx4kv5u/gimp-2.9.5-
> 20160906.glibc2.15-x86_64.AppImage?dl=0
>
> Regards,
> Andrea
>
> > On 06 Sep 2016, at 18:35, Michael Natterer <mitch gimp org> wrote:
> >
> > On Tue, 2016-09-06 at 16:47 +0200, Carmelo DrRaw wrote:
> > > > On 06 Sep 2016, at 16:41, Michael Natterer <mitch gimp org> wrote:
> > > >
> > > > On Tue, 2016-09-06 at 16:30 +0200, Carmelo DrRaw wrote:
> > > >
> > > > In GIMP git master, you would say
> > > >
> > > > gimp_preview_area_set_color_config (gimp_preview_get_area
> > > > (preview),
> > > >                                     gimp_get_color_configuration
> > > > ());
> > >
> > > Thanks! However, I assume that the ICC conversion is done in this
> > > case using 8-bits precision, right?
> > >
> > > I would like to take advantage of the fact that G’MIC handles
> > > floating-point precision, by doing the ICC conversion before the
> > > conversion to 8-bits…
> >
> > Moreover, this API only makes sure an assumed-to-be-sRGB image
> > is displayed correctly in 8 bit.
> >
> > You can omit this call, and feed color-corrected pixels to
> > the preview directly, look at the GimpColorTransform API
> > in libgimpcolor, which is a simple wrapper around lcms
> > (which you don't need to use at all).
> >
> > For the image profile, use gimp_image_get_effective_color_profile(),
> >
> > for getting the transform, best use gimp_widget_get_color_transform()
> > which will look up the right display profile by itself.
> >
> > Also, use gimp_widget_track_monitor() so you can recreate
> > the transform when the window is moved to another monitor.
> >
> > For example code, grep for
> >
> > gimp_widget_get_color_transform
> > gimp_widget_track_monitor
> >
> > in libgimpwidgets/ and app/widgets/
> >
> > Regards,
> > --Mitch
> >
> > > > My question was if this is a plug-in against GIMP 2.8 (soon
> > > > obsolete)
> > > > or against GIMP git master.
> > > >
> > > > I wouldn't bother do add color management to a GIMP 2.8 plug-in
> > > > and I have never tried.
> > >
> > > I see… G’MIC is already adapted to high bit depth and 2.9 API, so I
> > > think it is worth adding proper color management.
> > >
> > > Regards,
> > > Andrea
> > >
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