fnt2cfg.py

# fnt2cfg.py v0.1 ~tomekzaw 2022
# https://gist.github.com/tomekzaw/ac3aa4942587869119dd926da024b6e9

import argparse
from pathlib import Path


def fnt2cfg(d: bytes) -> bytes:
    d = bytearray(d)
    for i in 2, 105, 113:
        d[i:i+4] = d[i:i+4][::-1]
    for i in 68, 70, 72, 83, 88, 91, 93, 99:
        d[i:i+2] = d[i:i+2][::-1]
    for i in range(118, d.find(b'\x00' * 8, 118) - 4, 2):
        d[i:i+2] = d[i:i+2][::-1]
    return bytes(d)


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('-i', '--input', required=True)
    parser.add_argument('-o', '--output', required=True)
    args = parser.parse_args()

    if not Path(args.input).exists():
        raise SystemExit('Input file not found')
    if not Path(args.input).is_file():
        raise SystemExit('Input path is not a file')
    if Path(args.output).exists():
        raise SystemExit('Output file already exists')

    with open(Path(args.input), 'rb') as f:
        output = fnt2cfg(f.read())
    with open(Path(args.output), 'wb') as f:
        f.write(output)

    print('OK')

http://www.vsoft.nl/software/utils/win/fontedit/

python3 fnt2cfg.py -i font.FNT -o font.BIN