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Slug Algorithm: 10 Years of GPU-Based Font Rendering Technology

By

mwkaufma

2mo ago· 11 min readenInsight

Summary

Eric Lengyel reflects on the 10-year anniversary of the Slug Algorithm, a GPU-based font rendering technique he developed in 2016. The article details the algorithm's development timeline, its publication in JCGT in 2017, commercialization through the Slug Library, and widespread adoption across video games, scientific visualization, CAD, video editing, and medical equipment industries. It covers the technical evolution from version 1.0 to current implementations, performance improvements, and the algorithm's impact on real-time text rendering.

Key quotes

· 3 pulled
What is now known as the Slug Algorithm for rendering fonts directly from Bézier curves on the GPU was developed in the Fall of 2016, so this year marks a full decade since its inception.
I published a paper in JCGT about the technique in the middle of 2017, and my company sold the first license for version 1.0 of the Slug Library not long afterward.
Since then, Slug has been licensed widely in the video games industry as well as by an array of companies specializing in areas like scientific visualization, CAD, video editing, medical equipment.
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Eric Lengyel   •   March 17, 2026

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