Re: [Gimp-developer] How to call gimp_export_image() from Python plugin

["Joao S. O. Bueno" <gwidion gmail com>]

On 18 June 2014 07:43, Vladimir Rutsky <rutsky vladimir gmail com> wrote:
> On Wed, Jun 18, 2014 at 7:32 AM, Joao S. O. Bueno <gwidion gmail com> wrote:
> > From Python, in GIMP 2.8, you have to make calls to whatever is
> > available via the PDB, but
> > for some calls that have been shortened as methods of Image, Layer and
> > other objects (but internally,
> > most things happen through the PDB anyway).
> >
> >
> > So, you have to call either "pdb.gimp_file_save"  and specify the file
> > format via the file-name extension,
> > or call "pdb.file_bmp_save". For both cases you have to passin a
> > drawable to be saved, meaning that if you
> > want to save an existingimage, you hvae to preceed these calls with
> > the equivalent of these two lines:
> >
> > saving_image = pdb.gimp_image_duplicate(img)
> > saving_drawable = pdb.gimp_image_merge_visible_layers(saving_image)
> >
> > then you have a drawable to save, with all the visible image contents,
> > but without messing
> > with the image the user sees. After saving, call
> > "pdb.gimp_image_delete(saving_image)" - to recover
> > the resources used by the temporary image,
> >
> >   js
> >  -><-
>
> Thank for your reply, but this doesn't solves my problem.
>
> merge_visible_layers() doesn't behave as gimp_export_image(): it only
> merges image layers to single layer.
> I need not only to merge them, but also to convert to proper image
> format suitable for me (e.g. convert to RGB from GRAY or RGBA) and
> probably some other convertions.

so, just do the needed conversions through further PDB calls.
as you can see, gimp_export_image is not available to plug-ins as of
gimp 2.8 series.
(yes, it should be, and yes you can open a  bug report requesting that
so that we don't  forget about it,
but this is an API change, so it will just be there for GIMP 2.10 anyway).


   js
 -><-

> And gimp_export_image() designed specifically for my task.
>
> According to it's sources
> (https://git.gnome.org/browse/gimp/tree/libgimp/gimpexport.c) there
> are quite a lot of steps and not so trivial logic that should be done
> to obtain result image, and I don't want to reimplement this
> functionality, I want to call gimp_export_image().
>
> > On 17 June 2014 19:43, Vladimir Rutsky <rutsky vladimir gmail com> wrote:
> > > Hello!
> > >
> > > I'm trying to write export plugin for custom image format in Python.
> > >
> > > Looking at plugins implemented in C, e.g. gimp/plug-ins/file-bmp/bmp.c, and
> > > docs (http://developer.gimp.org/api/2.0/libgimp/libgimp-gimpexport.html)
> > > I see, that best and recommended way to convert user image to single layer
> > > image with proper capabilities is by using gimp_export_image() function.
> > >
> > > How gimp_export_image() can be called from Python?
> > >
> > > I can't find it exported Python modules and looks like it's not accessible
> > > via PDB either.
> > >
> > > If it's not available, can you advice proper alternative? Should I report
> > > missing gimp_export_image() function in bug tracker?
> > >
> > >
> > > Thanks in advance,
> > >
> > > Vladimir Rutsky
> > >
> > > _______________________________________________
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> > > List address:    gimp-developer-list gnome org
> > > List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list
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>
>
> --
> Vladimir Rutsky