unpack bmfont texture

bmfont_unpacker.py

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

import sys
import os
from PIL import Image
import xml.etree.ElementTree as ElementTree


def unpack_fnt(f):
    root = ElementTree.parse(f).getroot()
    fnt_dir = os.path.dirname(f)

    dst_dir = os.path.join(fnt_dir, 'unpacked')
    if not os.path.isdir(dst_dir):
        os.mkdir(dst_dir)

    pages = {}
    for page in root.find('pages').iter('page'):
        pages[page.attrib['id']] = Image.open(os.path.join(fnt_dir, page.attrib['file']))

    for char in root.find('chars').iter('char'):
        name = '_' + char.attrib['id'] + '.png'
        dst_file = os.path.join(dst_dir, name)
        width = int(char.attrib['width'])
        height = int(char.attrib['height'])
        x = int(char.attrib['x'])
        y = int(char.attrib['y'])
        x_offset = int(char.attrib['xoffset'])
        y_offset = int(char.attrib['yoffset'])
        x_advance = int(char.attrib['xadvance'])
        w = width + x_offset
        if w < x_advance:
            w = x_advance
        glyph = Image.new('RGBA', [w, height + y_offset])
        glyph.paste(pages[char.attrib['page']].crop((x, y, x + width, y + height)), (x_offset, y_offset))
        glyph.save(dst_file)


if __name__ == '__main__':
    if len(sys.argv) == 2:
        fnt_file = sys.argv[1]
        if os.path.isfile(fnt_file):
            unpack_fnt(fnt_file)
        else:
            print "can't find .fnt file"
    else:
        print "usage: script.py <path to .fnt file>"