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The all-uppercase key words "MUST", "MUST NOT", "REQUIRED", "SHALL", The details about WOFF 2.0 development history can be found in the WOFF 2.0Įvaluation Report. Optimization step that reduces built-in redundancy of various font data structures. The improvement in compression rates,Ĭompared to previously developed WOFF 1.0 format Īre realized due to improved entropy coding and font data preprocessing and With significantly better compression than previous techniques, suitable for This format wasĭesigned to provide a reasonably easy-to-implement compression of font data This document specifies the WOFF2 font packaging format. Decoding of variable-length X and Y coordinates Overall file structure and basic data types This document is governed by the 15 September 2020 W3C Process Document.Ĭandidate corrections are marked in the document. RF licensing commitment for use in this specification. Individual who has actual knowledge of a patent which the individualĬlaim(s) must disclose the information in accordance with sectionįor the Brotli compression scheme used in WOFF 2.0, Google has made an Group that page also includes instructions for disclosing a patent. Patent disclosures made in connection with the deliverables of the
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This document was produced by a group operating under the W3C Patent Policy. Browser supportįor font collections is expected to improve, and once it does WOFF 2.0 already has Implementations of encoding and of decoding, no userĪgent is yet shown to use them after decoding. Note that, for OpenType Collections (previously, TrueType Collections) while there are two tested The source to build these tests is available on GitHub. The Working Group hasīrowsers, and for the format itself (a WOFF2 validator). Supporting material, including results of compression measurements, may be found in theĬompanion WOFF 2.0 Evaluation Report. It supports the entirety of the TrueType and OpenType specifications, including Variable fonts, Chromatic fonts, and font Collections.Ĭhanges to this document since the last publication is available. The WOFF 2.0 specification is implemented in all major browsers, and is widely used on production websites. W3C recommends the wide deployment of this specification as a standard for the Web. It includes candidate corrections.Ī W3C Recommendation is a specification that, after extensive consensus-building, has received the endorsement of the W3C and its Members. This document was published by the Web Fonts Working Group as a Recommendation.
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A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at. Other documents may supersede this document. This section describes the status of this document at the time of its publication. Improved entropy coding, compared to the Flate compression used in This is achievedīy combining a content-aware preprocessing step and
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Widely deployed, this specification was developed to provide improvedĬompression and thus lower use of network bandwidth, while stillĪllowing fast decompression even on mobile devices. W3C liability, trademark andīased on experience with WOFF 1.0, which is Please check the errata for any errors or issues reported since publication.Ĭopyright © 2021 W3C ® ( MIT, ERCIM, Keio, Beihang). WOFF File Format 2.0 W3C Recommendation 06 July 2021 This version: Latest version: Previous Version: Latest editor's draft: Implementation Report: Issue Tracking: WOFF & WOFF2 issues Editors: Vladimir Levantovsky (W3C Invited Experts) Raph Levien (Google)