#!/usr/bin/python2


# By StackOverflow user SadaleNet:
# https://stackoverflow.com/questions/14557944/downsizing-an-otf-font-by-removing-glyphs/34132900#34132900


import sys
import fontforge

if len(sys.argv) == 4:
    font = fontforge.open(sys.argv[1])

    f = open(sys.argv[2], "r")

    for i in f.read().decode("UTF-8"):
        font.selection[ord(i)] = True
    f.close()

    font.selection.invert()

    for i in font.selection.byGlyphs:
        font.removeGlyph(i)

    font.generate(sys.argv[3])
else:
    print "WARNING: Check the license of the source font\nbefore distributing the output font generated by this script.\nI'm not responsible for any legal issue caused by\ninappropriate use of this script!\n"
    print "Usage: {} [source font] [file with glyphs NOT to be removed] [output]".format(sys.argv[0])
    print "Example: {} /path/to/ukai.ttc chineseTranslation.txt ukaiStripped.ttf".format(sys.argv[0])