SIL Writing Systems Technology


A free and open rendering engine for complex scripts


Graphite engine source code

Graphite2 is a rework of the original Graphite engine that is faster, smaller, and uses an API that is better suited to the layout architecture of most text-processing applications.

 Graphite2 repository

Graphite compiler

The Graphite compiler is a tool that is used to compile together a TrueType font and GDL program describing font behaviors into a Graphite-enabled font.

The package includes the program and various documentation files, such as a description of the Graphite font tables, debugger file documentation, a formal GDL grammar, etc.

Download Graphite compiler


Go to Graphite font download page.

Documentation and tutorials

GDL documentation - the main GDL reference paper:

GDL Documentation
Sharon Correll, 2020-05-21
Download "GDLdocumentation.pdf", Acrobat PDF document, 725KB [8640 downloads]

GDL tutorial - an introduction to GDL programming:

GDL Tutorial
Sharon Correll, 2012-01-05
Download "", ZIP archive, 490KB [2617 downloads]

Also see the online tutorial.

Copyright © 2012 SIL International® and released under the  Creative Commons Attribution-ShareAlike 3.0 license (CC-BY-SA) unless noted otherwise.