Re: [Emacs-diffs] master 63f4f02: If requested, use external image converters for exotic formats

[Lars Ingebrigtsen <larsi@gnus.org>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> Why not split the string directly in image-converter--converters?
> Same for the ":probe" part?
>
> I.e. use something like:
>
>     (defvar image-converter--converters
>       '((graphicsmagick :command "gm" :convertargs ("convert") :probe ("-list" "format"))
>         (imagemagick :command "convert" :probe ("-list" "format"))
>         (ffmpeg :command "ffmpeg" :probe "-decoders"))
>
> so it works even if the command's name (or some of the args your need to
> pass to the command) contains spaces?

Yup; I'll do that.

> This said, given that you use separate methods for the different backends:
>
>     (cl-defmethod image-converter--probe ((type (eql imagemagick)))
>
> I don't understand why you need those args in
> image-converter--converters instead of putting them directly into
> their respective methods.

Two reasons: I wanted to give the users some more customisability, and
reuse the same code in both the ImageMagick and GraphicsMagick
conversion functions.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no