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Re: Native image rotation

From: Alan Third
Subject: Re: Native image rotation
Date: Sun, 24 Feb 2019 23:00:40 +0000
User-agent: Mutt/1.11.2 (2019-01-07)

On Sun, Feb 24, 2019 at 03:08:25PM -0500, Stefan Monnier wrote:
> > Actually, I'm not sure I understand the question.  What do you mean by
> > "cache does post-rotation"?
> I assume that the images go through various steps starting from the
> Elisp image descriptor and finishing with the final on-screen pixels
> being drawn.  My question was if, along this "pipeline", Emacs's image
> cache is placed before or after the rotation operation.

The maths for the rotation happen before the cache, the actual
rotation happens after, but should be hardware accelerated. If
hardware acceleration isn’t available, we simply ignore the
Alan Third

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