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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Native image rotation
Date: Sun, 24 Feb 2019 21:13:15 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> 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.