bucket fill right to the edge?

[tolworthy]

(12-08-2018, 08:04 AM)Blighty Wrote: Just in case tolworthy comes back.

There is a way to do this in Gimp.

If you have a black circle on a white background there are anti-aliasing pixels between the black and white. These are shades of grey. It is important to preserve these anti-aliasing pixels.

Summary of method:
1) Use Fuzzy select to select the white inside the circle.
2) Grow the selection by 1 or 2 pixels
3) Create a new transparent layer below your image.
4) On this new layer, bucket fill the selection with red
5) Select the top layer again
6) Colours > Colour to Alpha and accept the default white

Colour to Alpha preserves the anti-aliasing pixels.

That's great to know! Many thanks!