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Font Dozenalizer

Add a ↊ (turned digit two U218A) and a ↋ (turned digit three U218B) glyph to a given TrueType font by rotating the existing glyphs for two and three by 180 degrees and adding them at the right unicode points.

Installation

Make sure you have Python 3 installed on your computer. Then clone or download the repository and then install the dependencies by running the following command on a commandline from the root of the repository directory that you have cloned or downloaded.

python3 -m pip install -r requirements.txt

Or in case you prefer a dedicated virtual python environment you can do

source setup.sh

Usage

It's a standard Python commandline utility which you can run from any commandline as follows.

$ python3 addglyphs.py -h
usage: addglyphs.py [-h] [--ttx] [--no-ttx] inputfile outputfile

Add a turned two (U218A) and a turned three (U218B) glyph to the given TrueType font.

positional arguments:
  inputfile   file name of the input font
  outputfile  file name of the output font

optional arguments:
  -h, --help  show this help message and exit
  --ttx       also dump a ttx file of the result
  --no-ttx

So for example

$ python3 addglyphs.py Arial.ttf ArialDozenalized.ttf

will read an existing file called Arial.ttf and produce a new file named ArialDozenalized.ttf containing the additional dozenal glyphs.