In Gimp-3.0.2-1 the plugin does not register in the menu and sys.stderr shows the message:
TypeError: Gimp.Procedure.add_file_argument() takes exactly 8 arguments (5 given)

I fixed it a bit, but the plugin behaves a bit strangely: Watermark Image File window - every time you run it, you have to search for the file again, because it opens with (none).

This line:


It was replaced with this:


Is this normal behavior or is there something wrong with the code?

Not sure, I think I'll just stick to using Gimp 2.10.

Tin, none of the three watermark plugins you listed showed up while using a 3.0.2 AppImage derived from Mateusz Łukasik's PPA while using Linux Mint 22.1. 3.0.2 PPA

On the other hand, the one that MareroQ provided did work properly.

I'm not sure if that is important to you or not, at this moment early in the development of Gimp 3.0 but, I thought I would let you know just in case it was anything that you may want to know.

I checked how file-demo by Ofnuts behaves:
https://gitlab.com/gimp1614946/gimphelp ... type=heads

Select file to open:


For Re_Show:


Empty File (open):


For File (open) it doesn't work either:
Save Settings
Load Saved Settings

For Re_Show in Gimp-2.10.38-1


This is another major regression in Gimp 3.

A small step forward:
- include position and different sizes of layers
- added option to merge watermark with active layer

To distinguish it from the original plug:
In menu: Filters ➤ Render ➤ Decor ➤ Watermark for Layer from Image

A little suggestion for localization:
If instead of
def do_set_i18n(self, procname):
return True, 'gimp30-python', None

You do this
return True, None, None

The translation files could be in the plugin's folder instead of in GIMP' folder.
You can then have a locale folder with the plugin.
The .po/ .mo file would have the same name as your plugin like so

/locale/pl/LC_MESSAGES/Watermark3_for_Layer.po

Thanks for the tip.
My problem is that I don't know yet if I want to delve into Gimp 3 and writing plugins for it.

Another small change:
- I replaced "Image file" with (incorrect) pattern selection,
- Also included is a quietreader tip.

In menu: Filters ➤ Render ➤ Decor ➤ Watermark from Pattern



First, you need to save your watermark (image or text) as *.pat - and you will always have it at hand.
From your prepared watermark, you can create a pattern very quickly:



Edit: Sorry - attachment changed (incorrect one uploaded previously)

So if you're supposed to love what you do.
Then I am sticking with GIMP 2.10 and plug-ins for it.
If I don't stop using it then it won't die.
There isn't anything that I think is missing from 2.10 features.
The non destructive editing doesn't attract me that much because I am used to destructive editing and if I don't want it to edit then I just don't or Ctrl-Z.