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Re: [emms-help] Dynamic cover thumbnail caching

From: Yoni Rabkin
Subject: Re: [emms-help] Dynamic cover thumbnail caching
Date: Thu, 26 Oct 2017 06:58:26 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

Pierre Neidhardt <address@hidden> writes:

> Yoni Rabkin <address@hidden> writes:
>>>                                (setq err (call-process "convert" nil '(t t) 
>>> nil
>>>                                                        "-resize" (format 
>>> "%sx%s" size-value size-value)
>>>                                                        cover
>>>                                                        cache-dest-file)))))
>> If emacs has been compiled with imagemagick support, it should have some
>> of these features built-in. I think that Emacs does its own image
>> caching as well. Is is possible to leverage that instead of making an
>> external call?
> That was one of my main concerns for optimization.  If you look at my
> code, you'll see that I'm using the ImageMagick library
>       (image-size (create-image c) t)
> The library does not seem to provide any feature for _resizing_ an
> image.
> I hope you can prove me wrong.

I assumed it did without checking; I assumed wrong.

Perhaps a patch to src/image.c and lisp/image.el is the future as well.

   "Cut your own wood and it will warm you twice"

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