Table
fvar— Font Variations (OT §10.6.2).
Module tableFvar | Source packages/front/office/fonts/src/table/fvar.js | Deps fontErrors, fontReader, fontTag | Worker-safe yes
Declares the variation axes (wght, wdth, opsz, slnt, ital, + customs) with their [min, default, max] bbox in Fixed, and the named instances (per-axis coordinates).
Exports
| Symbol | Type | Description |
|---|---|---|
parseFvar |
function | (bytes) => { majorVersion, minorVersion, axes: Axis[], instances: Instance[] }. |
tableFvar |
factory | Factory. |
Usage
import fw from '@awacloud/fw';
import { fw_require, modules } from '@awacloud/fonts';
for (const m of [...fw_require, ...modules]) fw.runtime.register(m);
const { parseFvar } = fw.runtime.resolve('tableFvar');
const fvar = parseFvar(sfnt.tables.fvar.bytes);
console.log(fvar.axes.map(a => a.tag)); // ['wght','wdth',…]
Notes
instances[i].postScriptNameIDis optional (present wheninstanceSize > 4 + 4*axisCount).- Coordinates in Fixed 16.16; values outside
[min,max]are clamped by instantiation.