BdfFont

BdfFont is a library for manipulating Glyph Bitmap Distribution Format (BDF) Fonts.

Installation

pip install bdffont

Usage

Load

import shutil

from bdffont import BdfFont
from examples import assets_dir, build_dir


def main():
    outputs_dir = build_dir.joinpath('load')
    if outputs_dir.exists():
        shutil.rmtree(outputs_dir)
    outputs_dir.mkdir(parents=True)

    font = BdfFont.load(assets_dir.joinpath('unifont', 'unifont-15.1.05.bdf'))
    print(f'name: {font.name}')
    print(f'size: {font.point_size}')
    print(f'ascent: {font.properties.font_ascent}')
    print(f'descent: {font.properties.font_descent}')
    print()
    for glyph in font.glyphs:
        print(f'char: {chr(glyph.encoding)} ({glyph.encoding:04X})')
        print(f'glyph_name: {glyph.name}')
        print(f'advance_width: {glyph.device_width_x}')
        print(f'dimensions: {glyph.dimensions}')
        print(f'origin: {glyph.origin}')
        for bitmap_row in glyph.bitmap:
            text = ''.join(map(str, bitmap_row)).replace('0', '  ').replace('1', '██')
            print(f'{text}*')
        print()
    font.save(outputs_dir.joinpath('unifont-15.0.01.bdf'))


if __name__ == '__main__':
    main()

Create

import shutil

from bdffont import BdfFont, BdfGlyph
from examples import build_dir


def main():
    outputs_dir = build_dir.joinpath('create')
    if outputs_dir.exists():
        shutil.rmtree(outputs_dir)
    outputs_dir.mkdir(parents=True)

    font = BdfFont(
        point_size=16,
        resolution=(75, 75),
        bounding_box=(16, 16, 0, -2),
    )

    font.glyphs.append(BdfGlyph(
        name='A',
        encoding=ord('A'),
        scalable_width=(500, 0),
        device_width=(8, 0),
        bounding_box=(8, 16, 0, -2),
        bitmap=[
            [0, 0, 0, 0, 0, 0, 0, 0],
            [0, 0, 0, 0, 0, 0, 0, 0],
            [0, 0, 0, 0, 0, 0, 0, 0],
            [0, 0, 0, 0, 0, 0, 0, 0],
            [0, 0, 0, 1, 1, 0, 0, 0],
            [0, 0, 1, 0, 0, 1, 0, 0],
            [0, 0, 1, 0, 0, 1, 0, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 1, 1, 1, 1, 1, 1, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 1, 0, 0, 0, 0, 1, 0],
            [0, 0, 0, 0, 0, 0, 0, 0],
            [0, 0, 0, 0, 0, 0, 0, 0],
        ],
    ))

    font.properties.foundry = 'Pixel Font Studio'
    font.properties.family_name = 'Demo Pixel'
    font.properties.weight_name = 'Medium'
    font.properties.slant = 'R'
    font.properties.setwidth_name = 'Normal'
    font.properties.add_style_name = 'Sans Serif'
    font.properties.pixel_size = font.point_size
    font.properties.point_size = font.point_size * 10
    font.properties.resolution_x = font.resolution_x
    font.properties.resolution_y = font.resolution_y
    font.properties.spacing = 'P'
    font.properties.average_width = round(sum([glyph.device_width_x * 10 for glyph in font.glyphs]) / len(font.glyphs))
    font.properties.charset_registry = 'ISO10646'
    font.properties.charset_encoding = '1'
    font.generate_name_as_xlfd()

    font.properties.default_char = -1
    font.properties.font_ascent = 14
    font.properties.font_descent = 2
    font.properties.x_height = 5
    font.properties.cap_height = 7

    font.properties.font_version = '1.0.0'
    font.properties.copyright = 'Copyright (c) TakWolf'

    font.save(outputs_dir.joinpath('my-font.bdf'))


if __name__ == '__main__':
    main()

Test Fonts

• GNU Unifont Glyphs
• Galmuri
• 美咲フォント / Misaki

References

• X11 - Bitmap Distribution Format - Version 2.1
• Adobe - Glyph Bitmap Distribution Format (BDF) Specification - Version 2.2
• X Logical Font Description Conventions - X Consortium Standard

License

Under the MIT license.