How to make a mask from a selection?

[Scallact]

(02-09-2026, 04:33 PM)ersc57 Wrote: Terminology: 
You are right, by mask I mean an image with one layer that is pure black with a selection that is pure white. This is one of the input files for IOPaint inpaint.
The selection should indeed be filled with white.

Just a few tips :


To copy a selection to another image, use

Code:

SavedSelection = Gimp.Selection.save(YourImage)

and load the selection from the chanel with:

Code:

YourImage.select_item(Gimp.ChannelOps.REPLACE, SavedSelection)

I didn't test the transfer to another image, but this should work.
To fill a selection with white:

Code:

YourLayer.edit_fill(Gimp.FillType.WHITE)

https://lazka.github.io/pgi-docs/#Gimp-3....edit_fill

The python doc: https://lazka.github.io/pgi-docs/#Gimp-3.0