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1. *gerb ʰ-: reconstructed Proto-Indo-European root, meaning to carve
2. gerb: a font editor in gtk3 and Rust

Editing a glyph.

^{_{☛ See the Screenshots section.}}

gerb is a GUI font editor and IDE. It is not production ready, but all the basics are implemented.

It uses the UFOv3 format and can import:[^0]

• UFOv2 directories
• Glyphs files

and export:[^1]

• OpenType files (.otf)
• TrueType files (.ttf)

| ℹ️ Interested in contributing? Consult CONTRIBUTING.md. | | --- |

Features

• import from other font source formats
• export to .otf and .ttf
• configurable shortcuts system
• unlimited undos
• embedded python shell and API for scripting and plugins (work in progress)
• git integration (work in progress)
• themeable (work in progress)

Future features

• [ ] work with designspaces (tracking issue #22)

Screenshots [^2]

Alternative software

The indisputable FOSS font editor is FontForge. Realistically this is the only choice one has for making a professional quality typeface with free software.

Some other projects in development are:

• runebender: development seems to have slowed down (as of Wed 15 Mar 2023). Unfortunately, the project —while excellent— looks like it is encumbered by its UI toolkit's development. In contrast, gerb uses the standard FOSS UI toolkit, gtk.
• MFEK: it's focused on splitting every functionality into micro-libraries. gerb's technical goal is shipping a font editor.

Install

crates.io:

shell cargo install gerb

Prebuilt GNU/Linux & macos amd64 binaries

See 'Releases' for binaries of tagged releases built in the CI.

Build & Run

To build, you will need Rust's cargo tool. You can get it from your distribution's packages, or directly with the official rustup tool. If the build fails because of missing system libraries, see the Dependencies section of the README.

Download or clone the git repository with your method of choice, e.g.:

shell git clone https://github.com/epilys/gerb.git cd gerb cargo build --release

You can open a UFOv3 project from the GUI ( File->Open or Ctrl+O ) or directly in the command line with the -u flag. Assuming the project directory is "/path/to/font.ufo":

```shell

Directly calling the binary:

gerb -u /path/to/font.ufo

Running through cargo

cargo run --release -- -u /path/to/font.ufo ```

Configuration of various settings is stored at the $XDG_CONFIG_HOME/gerb directory in a TOML file. The usual location would be $HOME/.config/gerb/config.toml. dconf is not used but PRs that add dconf support are welcome.

Dependencies

Needs gtk-3. For the python feature you'll need libpython3.9 or greater.

On Debian and relatives:

shell apt install libgtk-3-dev

On macOS you can install dependencies with Homebrew:

shell brew install librsvg gtk+3 gnome-icon-theme