A modern, hardware-accelerated rewrite of Emacs in C and OpenGL

Installation • Features • Documentation •

Overview

Features

🚀 Modern Architecture

• Hardware-accelerated rendering powered by OpenGL through the Lume engine
• Blazing-fast performance with native C implementation
• Runtime extensibility using C without VM overhead
• Tree-sitter integration for robust syntax analysis

🎨 Advanced Text Editing

• Smart Cursor Behavior

  • Crystal cursor mode that adapts to syntax context
  • Customizable blinking with configurable intervals
  • Emacs-style intelligent cursor movement

• Sophisticated Buffer Management

  • Independent window scrolling
  • Per-window cursor positions (not true TODO)

• Emacs-Compatible Features

  • Kill ring for advanced cut/paste operations
  • Mark and region
  • Incremental search (I-search)
  • Electric pair and rainbow mode
  • Tree-sitter powered syntax highlighting
  • Flexible window management

Key Bindings

NOTE: They are still hardcoded in the callback functions

Universal argument

• C-0..9 - Digit argument

File Operations

• C-x C-f - Find file
• C-x C-s - Save buffer
• C-x C-q - Read only mode

Navigation

• C-n - Next line
• C-p - Previous line
• M-n - Forward paragraph
• M-p - Backward paragraph
• M-b - Backward word
• C-f - Forward character
• C-b - Backward character
• M-f - Forward word
• C-e - Move to end of line
• C-a - Move to beginning of line
• M-> - End of buffer
• M-< - Beginning of buffer

Editing

• C-space - Set mark
• C-d - Delete character/kill region
• C-k - Kill line/kill region
• C-y - Yank
• M-w - Kill ring save
• C-w - Kill region
• C-o - Open line
• C-O - Duplicate line
• M-c - Capitalize word

Extension

• C-j - Eval last sexp
• C-v - Eval Expression
• M-: - Eval Expression
• R-e - Eval region

Search

• C-s - Incremental search forward
• C-r - Incremental search backward

Window Management

• M-q / C-x 0 - Delete window
• M-j / C-x 2 - Split window below
• M-k - Split window above
• M-h - Split window left
• M-l / C-x 3 - Split window right
• C-x o - Other Window

Customization

• M-= - Next theme
• M-- - Previous theme
• C-= - Increase font size
• C-- - Decrease font size

For the complete list of keybindings, start reading the keyCallback() function in main.c.

Installation

Prerequisites

• FreeType
• Tree-sitter
• OpenGL 4.6+
• GLFW
• Lume engine

Build Instructions

1. Clone and install the Lume library:

git clone https://github.com/laluxx/lume.git
cd lume
make && sudo make install

2. Clone build and run Glemax:

git clone https://github.com/laluxx/glemax.git
cd glemax
make && ./glemax

TODO

• Iedit mode
• Rainbow delimiters mode
• Undo system
• Dired and wdired
• Proced
• Org-mode support
• Runtime variable/function inspection
• Integrated debugger
• Eshell
• EWW
• C evaluation

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.