Re: Native image rotation

[Eli Zaretskii]

> Date: Sun, 24 Feb 2019 21:13:15 +0200
> From: Eli Zaretskii <address@hidden>
> Cc: address@hidden
> 
> > From: Stefan Monnier <address@hidden>
> > Date: Sun, 24 Feb 2019 13:51:17 -0500
> > 
> > >> The idea was to generate them with Emacs once, and cache the rotated 
> > >> version.
> > > AFAIK, that's not what the feature does.  It rotates the specified
> > > image on the fly.  At least that's how image scaling works.
> > 
> > If Emacs's image cache does the caching post-rotation, that should
> > work OK.
> 
> AFAIR, it doesn't, at least not on all platforms.

Actually, I'm not sure I understand the question.  What do you mean by
"cache does post-rotation"?  A cache -- any cache -- just stores
something computed elsewhere.  How can a cache rotate anything?