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

["Ed ." <ej_zg hotmail com>]

Just to clarify, JS - you say "gimp_export_image is not available to 
plug-ins as of gimp 2.8 series" - I take it you mean to Python plug-ins? 
Because it works fine in Gimp-Perl plug-ins.

I'd claim that the lack of gimp_export_image in pygimp is a bug, not a 
feature to be added, so it should be possible to add in 2.8. Vladimir, it 
ought to be as simple as adding to pygimp gimpexport, in the same way as 
there is gimpui. See 
http://developer.gimp.org/api/2.0/libgimp/libgimp-gimpexport.html

Ed J
Gimp-Perl guy

-----Original Message----- 
From: Vladimir Rutsky
Sent: Wednesday, June 18, 2014 1:27 PM
To: gwidion gmail com
Cc: gimp-developer
Subject: Re: [Gimp-developer] How to call gimp_export_image() from 
Pythonplugin

On Wed, Jun 18, 2014 at 3:19 PM, Joao S. O. Bueno <gwidion gmail com> wrote:
> 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).

Ok, thank you for clarification. I filed bug:
https://bugzilla.gnome.org/show_bug.cgi?id=731843

Why it can be released sooner? I'm not familiar with GIMP development
process, but I think exporting additional function doesn't break
backward compatibility of API.
If I'll submit patches for this issue, when I can expect to see it in
some official release of GIMP (in case patches will be accepted)?


--
Vladimir Rutsky



>    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
> > > >
> > > > _______________________________________________
> > > > gimp-developer-list mailing list
> > > > List address:    gimp-developer-list gnome org
> > > > List membership: 
> > > > https://mail.gnome.org/mailman/listinfo/gimp-developer-list
> > > > List archives:   https://mail.gnome.org/archives/gimp-developer-list
> >
> >
> > --
> > Vladimir Rutsky
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