Dotted Font Builder

A library that helps create dotted style fonts.

Installation

pip install dotted-font-builder

Usage

import datetime
import shutil

from examples import build_dir
from dotted_font_builder import FontBuilder, WeightName, SerifStyle, SlantStyle, WidthStyle, Glyph, opentype


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

    builder = FontBuilder()
    builder.font_metric.font_size = 12
    builder.font_metric.horizontal_layout.ascent = 10
    builder.font_metric.horizontal_layout.descent = -2
    builder.font_metric.vertical_layout.ascent = 6
    builder.font_metric.vertical_layout.descent = -6
    builder.font_metric.x_height = 5
    builder.font_metric.cap_height = 7

    builder.meta_info.version = '1.0.0'
    builder.meta_info.created_time = datetime.datetime.fromisoformat('2024-01-01T00:00:00Z')
    builder.meta_info.modified_time = builder.meta_info.created_time
    builder.meta_info.family_name = 'My Dotted'
    builder.meta_info.weight_name = WeightName.REGULAR
    builder.meta_info.serif_style = SerifStyle.SANS_SERIF
    builder.meta_info.slant_style = SlantStyle.NORMAL
    builder.meta_info.width_style = WidthStyle.MONOSPACED
    builder.meta_info.manufacturer = ''
    builder.meta_info.designer = 'OverflowCat'
    builder.meta_info.description = 'A demo dotted font.'
    builder.meta_info.copyright_info = 'Copyright (c) OverflowCat'
    builder.meta_info.license_info = 'This Font Software is licensed under the SIL Open Font License, Version 1.1.'
    builder.meta_info.vendor_url = 'https://github.com/OverflowCat/dotted-font-builder'
    builder.meta_info.designer_url = 'https://overflow.cat'
    builder.meta_info.license_url = 'https://openfontlicense.org'
    builder.meta_info.sample_text = 'Hello World!'

    builder.character_mapping.update({
        ord('A'): 'CAP_LETTER_A',
    })

    builder.glyphs.append(Glyph(
        name='.notdef',
        horizontal_origin=(0, -2),
        advance_width=8,
        vertical_origin=(-4, 0),
        advance_height=12,
        bitmap=[
            [1, 1, 1, 1, 1, 1, 1, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 0, 0, 0, 0, 0, 0, 1],
            [1, 1, 1, 1, 1, 1, 1, 1],
        ],
    ))
    builder.glyphs.append(Glyph(
        name='CAP_LETTER_A',
        horizontal_origin=(0, -2),
        advance_width=8,
        vertical_origin=(-4, 0),
        advance_height=12,
        bitmap=[
            [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],
        ],
    ))

    builder.save_otf(outputs_dir.joinpath('my-dotted.otf'))
    builder.save_otf(outputs_dir.joinpath('my-dotted.woff2'), flavor=opentype.Flavor.WOFF2)
    builder.save_ttf(outputs_dir.joinpath('my-font.ttf'))
    builder.save_bdf(outputs_dir.joinpath('my-font.bdf'))
    builder.save_pcf(outputs_dir.joinpath('my-font.pcf'))


if __name__ == '__main__':
    main()

Coordinate Systems

Use the same coordinate systems as OpenType.

Horizontal Layout

Vertical Layout

Supported Output Formats

Dependencies

• FontTools
• BdfFont
• PcfFont

References

• FreeType Glyph Conventions - Glyph Metrics
• OpenType Feature File Specification

License

Under the MIT license.