Shoeboxで生成したBMFont(ビットマップフォント)テクスチャを等幅フォントのように配置し直すPythonスクリプト

about.png

conv_monospc.py

#!/usr/bin/env python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2015/07/13 07:48:16 +0900>

"""
Shoeboxで出力したBMFont画像を読み込んで、
等幅フォントのように配置し直した画像を作成するスクリプト

usage:
  python conv_monospc.py BMFONT.png BMFONT.fnt [OUTPUT.png]

by mieki256

2015/07/13 ver. 0.0.1 とりあえず作成

LICENSE : CC0 / Public Domain
"""

import sys
import os
from PIL import Image

OUTPUT_FILENAME_DEF = "output.png"

ASCII_SPC = 0x020
ASCII_END = 0x07f

TEST_BMFONT = "font-export.png"
TEST_FNT = "font-export.fnt"

USAGE_MSGS = [
    "Usage:",
    "  Python conv_monospc.py BMFONT.png BMFONT.fnt [OUTPUT.png]"
]


class CharData():

    """char data"""

    def __init__(self, arg):
        self.arg = arg
        self.data = {}
        for s in arg.split(" "):
            if s == "char":
                continue
            if s == "\"":
                continue
            if "letter=" in s:
                if s == 'letter="':
                    self.data['letter'] = ' '
                else:
                    self.data['letter'] = s[8]
            else:
                k, v = s.split("=")
                self.data[k] = int(v)

    def get_size(self):
        return (self.data['width'], self.data['height'])

    def get_charcode(self):
        return ord(self.data['letter'])

    def paste_image(self, src, dst, tx, ty, max_w, max_h):
        sx = self.data['x']
        sy = self.data['y']
        sw = self.data['width']
        sh = self.data['height']
        box = (sx, sy, sx + sw, sy + sh)
        region = src.copy().crop(box)
        w, h = region.size
        tx += (max_w - w) / 2
        ty += (max_h - h) / 2
        dst.paste(region, (tx, ty))


def print_usage():
    for s in USAGE_MSGS:
        print s
    sys.exit


def main():
    bmfont = ""
    fnt_file = ""
    out_file = OUTPUT_FILENAME_DEF

    if len(sys.argv) == 3:
        bmfont = sys.argv[1]
        fnt_file = sys.argv[2]
    elif len(sys.argv) == 4:
        bmfont = sys.argv[1]
        fnt_file = sys.argv[2]
        out_file = sys.argv[3]
    elif len(sys.argv) == 1:
        # test
        if os.path.isfile(TEST_BMFONT):
            bmfont = TEST_BMFONT
        if os.path.isfile(TEST_FNT):
            fnt_file = TEST_FNT

    if bmfont == "" or fnt_file == "":
        print_usage()
        sys.exit()

    objs = {}

    # .fntを読み込み
    f = open(fnt_file)
    for line in f:
        line = line.rstrip()
        p = line.split(" ")
        if p[0] != "char":
            continue
        id = int(p[1].split("=")[1])
        objs[id] = CharData(line)
    f.close()

    # 一番大きい文字サイズを取得
    max_w, max_h = 0, 0
    for key in objs:
        w, h = objs[key].get_size()
        if w > max_w:
            max_w = w
        if h > max_h:
            max_h = h

    # 画像読み込み
    src_im = Image.open(bmfont, "r")

    # 新しい画像を作成
    img_w = max_w * 16
    img_h = max_h * (ASCII_END + 1 - ASCII_SPC) / 16
    new_im = Image.new('RGBA', (img_w, img_h))

    # 文字を並び替え
    for key in objs:
        o = objs[key]
        code = o.get_charcode()
        if code > ASCII_SPC and code <= ASCII_END:
            c = code - ASCII_SPC
            x = (c % 16) * max_w
            y = (c / 16) * max_h
            # print "code=%s x,y = %d,%d" % (code, x, y)
            o.paste_image(src_im, new_im, x, y, max_w, max_h)

    # new_im.show()
    new_im.save(out_file)

if __name__ == '__main__':
    main()

ShoeBox は以下から入手できます。

http://renderhjs.net/shoebox/