On 2.1.2022 16:54, Alan Third wrote:
> That's actually what I'd expect to happen, tbh. :)
> 

> There's a bit of a problem with Emacs image manipulation, IMO, in that
> the transform order is baked in, so we end up with strange situations
> like when you set max-width, then rotate 90 degrees so now max-width
> affects the height of the image instead of the width.
> 
> So whatever, I don't feel very strongly about it.

In my experience the way flipping works now is how image viewers 
generally work. But I
guess neither is the one true way, the way it works now is my 
preference. If many do feel
strongly about it, then it can be changed I guess.

> 
> One more thing: do you feel up to adding a note in the manual about
> this new property? It should go in doc/lispref/display.texi. Look for
> rotation.
> 

I added documentation as requested plus code comments.

The paperwork was sent on 26th Dec to assign@gnu.org, so admins please 
check there.