Survey CMAP tables of installed fonts

cmap-survey.py

from fontTools.ttLib import TTFont
import glob
from tabulate import tabulate
import os
import random


paths = [
  os.path.expanduser("~/Library/Fonts"),
  "/Library/Fonts",
  "/System/Library/Fonts/",
  "/Library/Application Support/Apple/Fonts/Language Support"
]

countoftables = {}
formats = {}
platencs = {}
examples = {}
fonts = 0
for path in paths:
  for fontfile in glob.glob(path+"/*.?tf"):
    font = TTFont(fontfile)
    if not "cmap" in font: continue
    fonts = fonts + 1
    c = font["cmap"].tables
    countoftables[len(c)] = 1 + countoftables.get(len(c),0)
    for table in font["cmap"].tables:
      formats[table.format] = 1 + formats.get(table.format,0)
      platEnc = "platformID=%2i encodingID=%2i" % (table.platformID, table.platEncID)
      platencs[platEnc] = 1 + platencs.get(platEnc,0)
      if not platEnc in examples or random.random() > 0.6:
        examples[platEnc] = os.path.basename(fontfile)

total = sum(countoftables.values())
keys = sorted(countoftables.keys())
print("Surveyed %i fonts" % fonts)
values = [ "%6.2f%%" % (countoftables[k]/total*100) for k in keys]
print(tabulate([ ["Number of cmap tables"] + keys, ["% of fonts"] + values]))
print()
total = sum(formats.values())
keys = sorted(formats.keys())
values = [ "%6.2f%%" % (formats[k]/total*100) for k in keys]
print(tabulate([ ["cmap table format"] + keys, ["% of tables"] + values]))
print()
table = []
for  p in sorted(platencs.keys()):
  table.append([p, int(platencs[p]/total*10000)/100, examples[p]])
print(tabulate(table))