AloisJanicek / font-patcher

:man_facepalming: Font line height patcher

Font Patcher Thing

Script to increase the line height of a font

Intro

This script shouldn't really exist, and patching fonts in this way isn't really such a good idea. However, Emacs currently doesn't have proper support for adjusting line height, as summarized in this stack overflow question. The only workaround that I have found to work reliably, is to patch the font itself to include the proper spacing. So, here is a script that at least makes the process easy.

Examples

The easiest way to run the script is to build a docker image via the Dockerfile provided.

# build the image (only required once)
docker build -t font-patcher .

Patch a single font file

docker run --rm -v $(pwd):/home font-patcher \
    /usr/bin/python /home/src/main.py \
    --factor=1.3 \ # increase the line height by 30%
    --input=/home/fonts/Operator\ Mono.otf \ # mounted path to the original font file
    --outputDir=/home/fonts/patched # directory to save the new font file

Patch multiple font files at once

This is really just the repetition of patching a single font file, but since it's so common, here is an example:

for x in $(ls fonts/Operator\ Mono); do
    docker run --rm -v $(pwd):/home font-patcher \
        /usr/bin/python /home/src/main.py \
        --factor=1.3 \ # increase the line height by 30%
        --input=/home/fonts/$x \ # mounted path to the original font file
        --outputDir=/home/fonts/patched # directory to save the new font file
done