Changes/SwitchToJXLforDefaultWallpaper

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Switch to JXL format for Default Wallpaer

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.

Summary

The default Fedora wallpaper will switch from PNG to JXL format.

Owner

• Name: Luya Tshimbalanga
• Email: luya@fedoraproject.org

Current status

• Targeted release: Fedora Linux 42
• Last updated: 2025-02-08
• [<link to devel-announce post will be added by Wrangler> Announced]
• [<will be assigned by the Wrangler> Discussion thread]
• 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

For a long time, the default Fedora wallpaper used PNG format to preserve the integrity of the design. The drawback is the large file size for packaging and for the time of day animation. The Design team switched to JXL to address the issue drastically saving the size of the media while supporting the .

Benefit to Fedora

• The size of the default wallpaper is drastically reduced when using JXL format compared to PNG. An example

Scope

• Proposal owners:

The Design team switch the format from PNG to JXL format for the default wallpaper on Fedora Workstation and Spin variants.

• 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 the Fedora Strategy:

Upgrade/compatibility impact

No major impact for desktop environment supporting JXL format. If needed, convert JXL to JPEG as fallback.

Early Testing (Optional)

Do you require 'QA Blueprint' support? Y/N

User Experience

Install the packaged default wallpaper

Contingency Plan

• Contingency mechanism: (What to do? Who will do it?) N/A (not a System Wide Change)
• 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)