[Gimp-gui] Improving Export

[Jehan <jehan girinstud io>]

Hi all,

Some may have heard that I have been working on improving Export lately 
(http://girinstud.io/news/2015/09/improving-the-export-process-in-gimp/), 
and for the ones who met me in LGM, you may even have known that I have 
been thinking about this topic for more than a year.

The basic idea is that our current export dialog is too basic, because 
it has been sharing the same code logics as "save" for too long. But 
while you *save* a work in progress without any loss in higher possible 
quality, you actually *export* a "snapshot" of this work for various 
different reasons (high quality print, small file for the web…). The 
export dialog should show its specificities.

So now we have 2 concepts of Save != Export since GIMP 2.8, result of 
the Save + Export spec 
(http://gui.gimp.org/index.php/Save_%2B_export_specification). And since 
my commits about a month ago, we have finally separate code bases for 
these, allowing us to go further.

I'm thinking that we could include optional modifications of the 
exported images (like resolution, color profile changes, etc.), and also 
that we could have the filetype-specific options in the export dialog 
itself, instead of being managed by the plugins (this of course implies 
an API change for GIMP 3.0 for instance).

The workgroup wiki page:
http://gui.gimp.org/index.php/Export_dialog_workgroup

What are your thoughts?

Jehan