Re: Image-conversion shims

[Juri Linkov]

>> We already have a working solution with imagemagick-register-types,
>> imagemagick-types-inhibit, imagemagick-enabled-types, and all related code.
>> Customization should be no different when images are handled via a process
>> instead of using a linked library.
>
> It's quite different -- for one, using the external library is off by
> default, but using ImageMagick is on by default (if you have an Emacs
> compiled with the support).
>
> But that's pretty much irrelevant for the discussion of
> `auto-mode-alist' -- an ImageMagick-enabled Emacs won't use `image-mode'
> for exotic image formats by default (you end up in `fundamental-mode' if
> you visit a .webp file).  The user has to put that into
> `auto-mode-alist' themselves.

After customizing imagemagick-enabled-types to t, it registers all image
types; image-converter could do the same.  This is a good trade-off to
not register all exotic formats in auto-mode-alist by default,
but still easy to customize to stuff everything to auto-mode-alist
when needed.