third_party/blink/renderer/modules/font_access/README.md
This directory contains the renderer-side implementation of Font Access API.
//content/browser/font_access/
contains the browser-side implementation, and
blink/public/mojom/font_access contains
the mojom interface for this API.
It consists of the following parts:
FontAccess: A supplement to window that exposes an operation to access
local fonts. FontAccess maintains a mojo connection with browser-side,
and is responsible for handling errors, and optionally applying query
filters provided by QueryOptions.
FontData: Implemented as FontMetadata.cc, FontData represents data
about a single font installed on the system. Currently, it provides basic
information such as postscript name, full name, family and style;
addiitonally, it exposes a method blob() for accessing additional font
blob data via Blink's FontCache.
(See more details here)