Hi all,
little update about the progress that has been made. So far, there are no visible changes to the user yet (if you don't count tons of new debug stuff on console), all work has been done under the hood. The good news is, that the basics for non-destructive editing has already landed in the codebase. You can now use Brightness/Contrast/Gamma tool and the Autolevels tool in such way, that it will automatically create new version of the edited image, apply the changes on the new version, move the original version to "
This is a companion discussion topic for the original entry at https://digikam.org/news/2010-06-15_gsoc_update_on_digikam_s_non-destructive_image_editing/