Bitty 📟

A WIP OpenGL terminal emulator written in modern C++, focusing on performance and simplicity. It mainly depends on GLFW, GLM, Nlohmann JSON, Freetype, Fontconfig, and some Boost libraries.

Currently only supports Linux!

Here's what it looks like on my machine right now, running neovim:

With a few minor visual artifacts and bugs here and there and a lack of support for emojis, it's currently at a stage where it's generally functional for most use cases but not necessarily usable as a daily driver.

I implement ANSI escape codes as I need them. Around 33 parsing rules have been implemented to that end, powered by a DFA for convenience.

List of things I have run with it:

• zsh with a Powerlevel10k prompt
• nano
• vim
• neovim
• fastfetch
• tmux
• man

Build

1. Make sure you have vcpkg installed and VCPKG_ROOT is defined.
2. Proceed to build using CMake: cmake -Bbuild . --preset vcpkg; cmake --build build

The project is using a clang-based toolchain by default. You may opt out of this and use your compiler of choice by editing CMakePresets.json and removing the relevant definitions.

Configuration

Searches for a config in $XDG_CONFIG_HOME/bitty.json or $HOME/.config/bitty.json. If neither is found, it searches for a config in the working directory. Otherwise, it adopts the default config.

Example configuration:

{
  "font_family": "Fira Code Nerd Font",
  "font_size": 13.0,
  "opacity": 0.6
}

There's not a lot of options as the emulator itself isn't very feature-rich as of now.