list-ttf-chars.py

"""
Dump a list of Unicode codepoints covered by a given TrueType font.

e.g.
python list-ttf-chars.py $ANDROID_HOME/platforms/android-XY/data/fonts/*.ttf

Requires FontTools: https://pypi.python.org/pypi/FontTools
"""

import sys

from fontTools.ttLib import TTFont, TTCollection

chars = {}
for f in sys.argv[1:]:
    try:
        if f.endswith('.ttc'):
            fonts = TTCollection(f)
        else:
            fonts = [TTFont(f)]
        for font in fonts:
            bestTable = font.getBestCmap()
            if bestTable is not None:
                chars.update(bestTable)
            else:
                print('Warning: Font does not have a Unicode cmap:',
                      f, file=sys.stderr)
                for table in font['cmap'].tables:
                    chars.update(table.cmap)
    except Exception:
        print('Could not process arg:', f, file=sys.stderr)
        raise

for c, desc in sorted(chars.items()):
    print('U+%06x %s' % (c, desc))