JPEG XL Support for Chat Background Images

Feature Proposal
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1

Some photograph people actually start to use jpeg XL format for test, and some hobyist have started to migrate to it due to the recent support (behind a flag) of chromium, because of it’s supperior quality at same (with often smaller than other small format (avif etc)) size.

I ask for the support of this formal jxl, into the background picture of the app (for both mobile and desktop).

So i ask for the support of chat background image first for two reason.

1 - This allow the dev team to see, any potential bug / issue on the app with this new format, ans asses the “size won” by using it.
2 - Since background image are personal (aka not shared with anyone), it allow a safe deployement with virtually no risk (if you don’t count a potential bug as a risk of course).

Expected behavior

Add a background image in JXL, and it show

Actual behavior

The image is not refused when forced in the image selector, but is not showed.

Example Images

As seen here only a plain color is shown (but expected if the codec is not here).

image
image474×817 8.97 KB

2

This is the culprit I would guess.
Delta Chat Desktop uses Chromium for that stuff, because it’s an Electron app.

Also you tagged Android and iOS. Those don’t support custom backgrounds IIRC.

3

actually they do, you can add a picture background but them (unlike on linux) you cannot force those picture.

As such the feature request remain relevan (even if the implementation will need to be different i guess)

4

Sorry, must have confused it with another TLA.

5

Actually it’s false, they are both patent free, and it’s even the opposit, jepeg xl has a clearer patent free status

a fast research give :

AVIF:

  • Built on the AV1 video codec from the Alliance for Open Media (AOMedia)
  • Has a royalty-free licensing model from member companies (Google, Amazon, Mozilla, Microsoft, Netflix, etc.)
  • However, there have been some isolated patent-infringement claims from external parties that are still being negotiated
  • No fees have been levied yet, but there’s a small unresolved risk of future claims

JPEG XL:

  • Standardized in 2022 by the JPEG committee
  • Has a comprehensive patent promise from all major contributors explicitly declaring it royalty-free
  • To date, no substantive third-party patent claims have emerged
  • Generally regarded as the more clearly patent-free option