fontkit

What is fontkit?

Fontkit is a comprehensive library for working with fonts in Node.js and the browser. It supports various font formats and provides a wide range of functionalities for font manipulation, including glyph rendering, font subsetting, and text layout.

What are fontkit's main functionalities?

Loading Fonts

This feature allows you to load a font from a file. The `openSync` method synchronously loads the font, making it ready for further operations.

const fontkit = require('fontkit');
const font = fontkit.openSync('path/to/font-file.ttf');

Glyph Rendering

This feature allows you to render glyphs from the font. You can get the glyph for a specific character and then convert it to an SVG path for rendering.

const glyph = font.glyphForCodePoint(65); // Get the glyph for the character 'A'
const path = glyph.path.toSVG(); // Get the SVG path data for the glyph

Font Subsetting

This feature allows you to create a subset of the font, including only the glyphs you need. This can be useful for reducing the size of the font file.

const subset = font.createSubset();
subset.includeGlyph(font.glyphForCodePoint(65)); // Include the glyph for 'A'
const subsetFont = subset.encode();

Text Layout

This feature allows you to layout text using the font. The `layout` method returns a run of glyphs, which you can then iterate over to get information about each glyph.

const run = font.layout('Hello, world!');
run.glyphs.forEach(glyph => {
  console.log(glyph.id, glyph.advanceWidth);
});

Other packages similar to fontkit

opentype.js

Opentype.js is a JavaScript library for parsing and working with OpenType and TrueType fonts. It provides functionalities for font parsing, glyph rendering, and text layout. Compared to Fontkit, opentype.js is more focused on OpenType and TrueType fonts and may not support as many font formats.

pdf-lib

PDF-lib is a library for creating and modifying PDF documents in JavaScript. It includes functionalities for embedding fonts and rendering text within PDFs. While it is not as specialized in font manipulation as Fontkit, it provides a broader range of PDF-related functionalities.

fonteditor-core

Fonteditor-core is a library for editing font files in JavaScript. It supports various font formats and provides functionalities for font parsing, glyph editing, and font generation. Compared to Fontkit, fonteditor-core is more focused on font editing and manipulation.

README

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