flood fill algorithm

I have done a brief internet search looking for a flood-fill algorithm. That is an algorithm to clear/mill and arbitrarily shaped region on a woodblock.I know there has to be commercial tools that do this but, for the moment, I'd like to incorporate it into my own CAM/G-Code tool.Can anyone point me to some pseudo code please.https://www.royalacademy.org.uk/article/felix-vallotton-beginners-guide

It is the kind of carving I want to do. Vallotton made quite remarkable woodblock prints. Very simple, black and white blocks. In his case hand carved.

A basic pixel image flood fill algorithm is easy but for a CNC cut with a finite tool size, it seems much harder.

Maybe I should just explore inkscape ?

Is image-to-gcode already installed alongside LinuxCNC ? Can it be found as a separate program ?

I found this  stand alone  version on GitHub from five years ago but it is not in Python3 and will take a fair amount of time to clean up.

The dmapto2gcode looks to be what I should run.

The code uses a Python module called tkinter which isn't in my system. I installed it using pip but dmapto2gcode still can't find the module to import.

I'm not a regular Python user so figuring out where modules might reside is a puzzle.

I have it working ! The issue is Python3 and compatible modules

I had to install a bunch of stuff:

sudo apt-get install python3-tk
sudo apt-get install python3-numpy
sudo apt-get install python3-pil
python3 -m pip install --upgrade pip
python3 -m pip install --upgrade Pillow

And then the program runs:
python3 ./dmap2gcode.py 

I hope this helps others...