ISO/IEC 14496-22:2019

Information technology — Coding of audio-visual objects — Part 22: Open Font Format

This document specifies the Open Font Format (OFF) specification, including the TrueType and Compact Font Format (CFF) outline formats. Many references to both TrueType and PostScript exist throughout this document, as Open Font Format fonts combine the two technologies. The document defines data structures for variaous font tables, and provides the necessary details for developers to build a font rendering and taxt layout/shaping engines in compliance with this document.

Technologies de l'information — Codage des objets audiovisuels — Partie 22: Format de police de caractères ouvert

General Information

• Status: Published
• Publication Date: 23-Jan-2019
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information

Relations

• Amended By: ISO/IEC 14496-22:2019/Amd 2:2023 - Information technology — Coding of audio-visual objects — Part 22: Open Font Format — Amendment 2: Extending colour font functionality and other updates
• Effective Date: 18-Dec-2021
• Amended By: ISO/IEC 14496-22:2019/Amd 1:2020 - Information technology — Coding of audio-visual objects — Part 22: Open Font Format — Amendment 1: Color font technology and other updates
• Effective Date: 31-Jul-2021
• Revises: ISO/IEC 14496-22:2015 - Information technology — Coding of audio-visual objects — Part 22: Open Font Format
• Effective Date: 09-Sep-2017
• Revises: ISO/IEC 14496-22:2015/Amd 2:2017 - Information technology — Coding of audio-visual objects — Part 22: Open Font Format — Amendment 2: Updated text layout features and implementations
• Effective Date: 09-Sep-2017
• Revises: ISO/IEC 14496-22:2015/Amd 1:2017 - Information technology — Coding of audio-visual objects — Part 22: Open Font Format — Amendment 1: Updates for font collections functionality
• Effective Date: 09-Sep-2017

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 14496-22
Fourth edition
2019-01
Information technology — Coding of
audio-visual objects —
Part 22:
Open Font Format
Technologies de l'information — Codage des objets audiovisuels —
Partie 22: Format de police de caractères ouvert
Reference number
ISO/IEC 14496-22:2019(E)
©
ISO/IEC 2019

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ISO/IEC 14496-22:2019(E)

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ii © ISO/IEC 2019 – All rights reserved

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ISO/IEC 14496-22:2019(E)
Contents Page

Foreword . vii
Introduction . viii
1  Scope . 1
2  Normative references . 1
3  Terms, definitions and abbreviated terms . 1
3.1  Terms and definitions . 1
3.2  Abbreviated terms . 2
4  The Open Font file format . 3
4.1  Description . 3
4.2  Filenames . 3
4.3  Data types . 3
4.4  Table version numbers . 4
4.5  Top-level OFF organization . 5
4.5.1  Offset table . 5
4.5.2  Table directory . 5
4.5.3  Calculating checksums . 6
4.6  Font collections . 6
4.6.1  The Font Collection overview . 6
4.6.2  The Font Collection file structure . 7
4.6.3  TTC header . 7
5  Open font tables . 8
5.1  General . 8
5.2  Required common tables . 8
5.2.1  List of required tables . 8
...