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Revision as of 06:34, 9 January 2023
Noto CJK Variable Fonts
This is a proposed Change for Fedora Linux.
This document represents a proposed Change. As part of the Changes process, proposals are publicly announced in order to receive community feedback. This proposal will only be implemented if approved by the Fedora Engineering Steering Committee.
This document represents a proposed Change. As part of the Changes process, proposals are publicly announced in order to receive community feedback. This proposal will only be implemented if approved by the Fedora Engineering Steering Committee.
Summary
Switch the default Noto CJK fonts for Chinese, Japanese and Korean from static to variable fonts.
Owner
- Name: Peng Wu
- Email: pwu@redhat.com
Current status
- Targeted release: Fedora Linux 38
- Last updated: 2023-01-09
- FESCo issue: <will be assigned by the Wrangler>
- Tracker bug: <will be assigned by the Wrangler>
- Release notes tracker: <will be assigned by the Wrangler>
Detailed Description
In order to reduce the font size in Noto CJK fonts, we plan to switch to use the variable fonts by default.
- Split the google-noto-cjk-fonts package into google-noto-sans-cjk-fonts and google-noto-serif-cjk-fonts, and provide the variable fonts in google-noto-sans-cjk-vf-fonts and google-noto-serif-cjk-vf-fonts.
- Drop several sub packages which are not installed by default from the google-noto-cjk-fonts package.
- Like google-noto-sans-cjk-*-fonts, google-noto-sans-*-fonts, google-noto-sans-mono-cjk-*-fonts, google-noto-serif-cjk-*-fonts and google-noto-serif-*-fonts
- Install the Noto CJK Variable Fonts by default.
Fedora Copr for testing: https://copr.fedorainfracloud.org/coprs/pwu/noto-cjk/
Feedback
Benefit to Fedora
The variable fonts will reduce the disk space usage and live image size compared to the static fonts.
| Size (bytes) | Noto Sans CJK | Noto Serif CJK |
|---|---|---|
| Static Fonts | 130674365 | 181621033 |
| Variable Fonts | 64613100 | 56924710 |
Scope
- Proposal owners:
- Package four font packages for Noto CJK fonts
- Retire google-noto-cjk-fonts in Fedora rawhide
- Switch to install variable fonts by default in fedora-comps and langpacks
- Submit pull request to lorax templates to use google-noto-sans-cjk-fonts in the boot.iso
- Other developers:
- Release engineering: #Releng issue number
- Policies and guidelines: N/A (not needed for this Change)
- Trademark approval: N/A (not needed for this Change)
- Alignment with Objectives:
Upgrade/compatibility impact
When upgrade, the variable fonts will be installed by default.
How To Test
- Please upgrade to Fedora 38 or rawhide to get the latest fonts
- Install the variable fonts: google-noto-sans-cjk-vf-fonts and google-noto-serif-cjk-vf-fonts
- Check the google-noto-sans-cjk-ttc-fonts and google-noto-serif-cjk-ttc-fonts packages are replaced
- Then use CJK locales to check if the new fonts have any problem
User Experience
This new variable fonts will reduce the disk space usage and live image size.
Dependencies
Contingency Plan
- Contingency mechanism: Use the static fonts by default - google-noto-sans-cjk-fonts and google-noto-serif-cjk-fonts
- Contingency deadline: N/A (not a System Wide Change)
- Blocks release? N/A (not a System Wide Change), Yes/No
Documentation
N/A (not a System Wide Change)
Release Notes
This new variable fonts will reduce the disk space usage and live image size.