One thing that might be useful if possible for the extension would be to automatically set the line width of the object down to zero as otherwise the code looks bad and might not scan overly well as the white cells are quite a bit smaller.

top a normal looking datamatrix, bottom the default of 0,4mm line width
Update: QR also affected, also just the line width isnt quite perfect, also setting the line type to none is even better.
Update2: the oxt in the repo and the python seem different, not sure which is newer
One thing that might be useful if possible for the extension would be to automatically set the line width of the object down to zero as otherwise the code looks bad and might not scan overly well as the white cells are quite a bit smaller.
top a normal looking datamatrix, bottom the default of 0,4mm line width
Update: QR also affected, also just the line width isnt quite perfect, also setting the line type to none is even better.
Update2: the oxt in the repo and the python seem different, not sure which is newer