Dear all,

today, we removed the PNG image fallback for Math rendering in LTS release 1_39

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Math/+/898882

By default, math images are fetched from Wikimedia's Restbase instance.

https://wikimedia.org/api/rest_v1/

However, this instance will stop providing PNG images shortly. Therefore, we recommend updating the Math extension if you expect that your users have chosen to render formulae in PNG instead of SVG images. According to

https://caniuse.com/svg

99.11% of all users should now be able to render SVG images.

If you render your math images locally

https://www.mediawiki.org/wiki/Extension:Math#Mathoid%27s_CLI_interface

you can upgrade whenever you update your local mathoid instance to a node version > 10. The current mathoid release (0.7.6) still supports PNG output when configured.

Please follow https://phabricator.wikimedia.org/T311620 for more details on the mathoid update procedure.

All the best physikerwelt

On Tue, Nov 22, 2022 at 9:33 PM Physikerwelt wiki@physikerwelt.de wrote:

Dear all,

The change is scheduled to take effect on most* wikis on December 1st, 22. From that time, the option to render in PNG mode will no longer be available from the user's preferences**.

All the best

physikerwelt

*) See https://phabricator.wikimedia.org/T320517 for detailed deployment information. **) https://www.mediawiki.org/wiki/Special:Preferences#mw-prefsection-rendering-...

On Fri, Nov 18, 2022 at 10:20 PM Physikerwelt wiki@physikerwelt.de wrote:

...

Dear all,

As discussed in https://phabricator.wikimedia.org/T311620, the PNG rendering mode will be removed shortly. Users who selected the PNG rendering mode will automatically be transferred to the new default rendering mode. Please spread this information to the interested communities.

All the best physikerwelt