Convert font to a series of PNG images

ttf2png.py

#!/usr/bin/python
"""Convert all defined glyphs from a font to PNG images

Needs FontForge, ImageMagick and pngcrush installed."""


import fontforge as ff
import os
import subprocess
import sys


def main(args):
    font = args[0]
    if not os.path.isfile(font):
        raise ValueError("Is no file: %s" % font)
    folder = os.path.splitext(os.path.basename(font))[0]
    if not os.path.isdir(folder):
        os.mkdir(folder)
    selection = ff.open(font).selection.all().byGlyphs
    for glyph in selection:
        cp = glyph.unicode
        xcp = '%04X' % cp
        fn = "%s/U+%s.png" % (folder, xcp)
        tfn = "%s/U+%s.tmp.png" % (folder, xcp)
        subprocess.call([
            "convert", "-background", "none", "-gravity", "center",
            "-size", "16x16", "-fill", "black", "-font", font,
            "-pointsize", "16", "label:"+unichr(cp).encode("UTF-8"), tfn])
        subprocess.call(["pngcrush", "-q", "-rem", "alla", tfn, fn])
        subprocess.call(["rm", tfn])


if __name__ == "__main__":
    main(sys.argv[1:])