compare point placement

Mike Duggan

hi, anyone know of a tool to compare and diff point placement between two ttf files?

Johannes Neumeier

fontdiffenator has a visual comparison; not exactly what you have in mind, I suppose, but still useful. I suppose you could ttx/ufo the files, or use fonttools directly, diff the parsed output.

Compare the first contour of /A in old.ttf to new.ttf:

from fontTools.ttLib import TTFont
from difflib import ndiff

old = TTFont("old.ttf")
new = TTFont("new.ttf")

old_A = old["glyf"]["A"].getCoordinates(old["glyf"])
new_A = old["glyf"]["A"].getCoordinates(new["glyf"])

print("\n".join(ndiff(
    [str(p) for p in old_A[0]],
    [str(p) for p in new_A[0]])))

Expand for all glyphs, composite glyphs and all contours, and play with difflib to get the output you want.

Mike Duggan

Thank you Johannes!