pyft-vertical-metrics.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

from fontTools import ttLib


def writeFont(font, filename):
    font.save(filename)
    print "Wrote font to", filename


def set_metrics(filename, ascents, descents, linegaps):
    font = ttLib.TTFont(filename)
    font['hhea'].ascent = ascents
    font['OS/2'].sTypoAscender = ascents
    font['OS/2'].usWinAscent = ascents
    font['hhea'].descent = descents
    font['OS/2'].sTypoDescender = descents
    font['OS/2'].usWinDescent = descents
    font['hhea'].lineGap = linegaps
    font['OS/2'].sTypoLineGap = linegaps
    writeFont(font, filename)


def fix_metrics(filename):
    font = ttLib.TTFont(filename)
    # Code here


    writeFont(font, filename)


def show_metrics(filename):
    font = ttLib.TTFont(filename)
    print("hhea asc:" + font['hhea'].ascent)
    print("OS/2 asc:" + font['OS/2'].sTypoAscender)
    print("OS/2 asc:" + font['OS/2'].usWinAscent)
    print("hhea des:" + font['hhea'].descent)
    print("OS/2 des:" + font['OS/2'].sTypoDescender)
    print("OS/2 des:" + font['OS/2'].usWinDescent)
    print("hhea lng:" + font['hhea'].lineGap)
    print("OS/2 lng:" + font['OS/2'].sTypoLineGap)


if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser()
    # $ python pyft-vertical-metrics.py font.ttf;
    # 1000
    # -200
    # $ python pyft-vertical-metrics.py --ascents 2189 --descents 600 --linegaps 0 font.ttf;
    # $ python pyft-vertical-metrics.py -a 2189 -d 600 -l 0 font.ttf;
    # $ python pyft-vertical-metrics.py font.ttf;
    # 2189
    # -600
    parser.add_argument('-a', '--ascents', type=int, help="Set new ascents value in 'Horizontal Header' table ('hhea')")
    parser.add_argument('-d', '--descents', type=int, help="Set new descents value in 'Horizontal Header' table ('hhea')")
    parser.add_argument('-l', '--linegaps', type=int, help="Set new linegaps value in 'Horizontal Header' table ('hhea')")
    parser.add_argument('--autofix', type=int, help="Autofix font metrics, overite file")
    parser.add_argument('filename', help="Font file in TTF format")

    args = parser.parse_args()
    if any([args.ascents, args.descents, args.linegaps]):
        set_metrics(args.filename, args.ascents, args.descents, args.linegaps)
    elif args.autofix:
        fix_metrics(args.filename)
    else:
        show_metrics(args.filename)