##U8glib package Ported from https://github.com/olikraus/u8glib Here is black magic with ImageMagic package for image conversion: ```bash #!/bin/bash mkdir out for icon in *png; do convert $icon -depth 1 ./out/$(basename $icon .png)_1bpp.png if [[ "$icon" == *"black"* ]]; then convert ./out/$(basename $icon .png)_1bpp.png -background white -alpha Background ./out/$(basename $icon .png)_1bpp.xbm else convert ./out/$(basename $icon .png)_1bpp.png -background black -alpha Background ./out/$(basename $icon .png)_1bpp.xbm fi cat ./out/$(basename $icon .png)_1bpp.xbm | tr '\n' ' ' | tr -d " " |sed -e s'#^.*{##g' | sed s'#,}##' |sed s'/;//' | xxd -r -p > ./out/$(basename $icon .png).xbm.mono done rm out/*png out/*xbm ``` Convert all the png in the current folder and put resulting .mono to ./out The convert binary is a part of ImageMagic package. You need to install it. ``` sudo apt-get install imagemagick ``` for Debian/Ubuntu.