Original description: As a first step toward creating an interface for rotating an image (see bug 32875), it would be very nice to have an API for rotating an image. This would then make it pretty easy to build a user interface to rotate an image (ala http://commons.wikimedia.org/wiki/Help:RotateLink )
Current progress: There is an API action=imagerotate, however, it is not considered to be performant enough to be enabled on Wikimedia wikis. We need a proper solution in MediaWiki that can be enabled on the WMF production cluster.
- Patch to fix this: https://gerrit.wikimedia.org/r/#/c/225097/ (Status: Waiting for review)