TextShaperPure TypeScript Text Shaping Engine

OpenType layout, variable fonts, complex scripts, TrueType hinting, and FreeType-style rasterization

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API Reference

OpenType Layout

Full GSUB/GPOS support with ligatures, kerning, mark positioning, and contextual alternates.

Variable Fonts

Complete variable font support with axis normalization, HVAR/VVAR metrics, and glyph deltas.

Complex Scripts

Arabic, Hebrew, Indic, Thai, Khmer, Myanmar, Hangul, and 40+ scripts via Universal Shaping Engine.

Rasterization

FreeType-style glyph rasterization with TrueType hinting, LCD subpixel rendering, and texture atlas generation.

Pure TypeScript

Zero dependencies, works in browsers and Bun/Node.js. No WebAssembly or native bindings required.

Color Fonts

COLR/CPAL color palettes, SVG glyphs, sbix bitmaps, and CBDT/CBLC color bitmap support.

Glyph path extraction

text-shaper

831.3k ops/s

opentype.js

86.8k ops/s

harfbuzzjs

52.4k ops/s

English shaping (1056 chars)

text-shaper

7.9k ops/s

harfbuzzjs

5.3k ops/s

Myanmar shaping (1916 chars)

text-shaper

4.0k ops/s

harfbuzzjs

380 ops/s

UI Simulation (8 labels)

text-shaper

95.5k ops/s

harfbuzzjs

20.0k ops/s

Rasterization @ 96px

text-shaper

13.3k ops/s

freetype2

2.0k ops/s

High performance

By using lazy table parsing, pure TypeScript optimization, and efficient data structures, TextShaper delivers exceptional performance for font loading, text shaping, and glyph rasterization.

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