2017-03-18 16:44 GMT+01:00 Andreas Politz <politza@hochschule-trier.de>:

> Fabrice Popineau <fabrice.popineau@gmail.com> writes:
>
> > My point is that only one of imagemagick and libpng will handle png
> > files at a time.  When ImageMagick is available, it supersedes png,
> > jpeg and anything it handles (AFAICS).
>
> No, the used library depends on the image-type, i.e.
>
> (create-image "foo.png" 'imagemagick)
>
>     vs.
>
> (create-image "foo.png" 'png)
>
>
That is when you program, but when you merely use emacs to browse files
with dired, or when some package generates and load images (preview-latex),
defaults are used. And the default is that imagemagick supersedes png and
jpeg.

Fabrice