font hacks

gistfile1.py

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

import sys

# GraphikRegular
# GraphiAppRegular  < 16.0


lineSpacingMultiplier = 1.3


import os
from fontTools.ttLib import TTFont
from Tkinter import Tk
from tkFileDialog import askdirectory
Tk().withdraw() # hide tk root window
#directory = askdirectory(initialdir='~/safe_fonts/line_spacing_x1.0_original')

BASE_DIR = '/Users/nataliepo/Desktop'
#directories = ['otf']
directories = ['smallFontsOnly']


for d in directories:
    
    directory = "%s/%s" % (BASE_DIR, d)
    for file in os.listdir(directory):
        file_name, extension = os.path.splitext(file)
        if extension in ['.otf', '.ttf']:
            sys.stderr.write("%s%s:\n" % (file_name, extension))
            
            font = TTFont(os.path.join(directory, file))
            sys.stderr.write("Full font obj: %s\n" % font)
            
            sys.stderr.write("\tAvg character width: %s\n" % font['OS/2'].xAvgCharWidth)
            sys.stderr.write("\tusWidthClass: %s\n" % font['OS/2'].usWidthClass)
            sys.stderr.write("\tminleftSideBearing: %s\n" % font['hhea'].minLeftSideBearing)
            sys.stderr.write("\tminRightSideBearing: %s\n" % font['hhea'].minRightSideBearing)    

            """ Adjust the line spacing """
            baseAsc = font['OS/2'].sTypoAscender
            baseDesc = font['OS/2'].sTypoDescender
            multiplier = float(lineSpacingMultiplier)
            font['hhea'].ascent = round(baseAsc * multiplier)
            font['hhea'].descent = round(baseDesc * multiplier)
            font['OS/2'].usWinAscent = round(baseAsc * multiplier)
            font['OS/2'].usWinDescent = round(baseDesc * multiplier)*-1           
            
            """ SAVE """
            os.remove(os.path.join(directory, file))
            file_name = "%s-%s" % (file_name, lineSpacingMultiplier)
            font.save(os.path.join(directory, file_name + extension))