[bug#47311] [PATCH] gnu: Add libheif.

[Leo Famulari]

On Mon, Mar 22, 2021 at 01:29:40AM -0300, Vinicius Monego wrote:
> * gnu/packages/image.scm (libheif): New variable.

Thanks!
> +    (home-page "https://github.com/strukturag/libheif";)

It says that these programs can use libheif:

GIMP
Krita
ImageMagick
digiKam 7.0.0
libvips
Kodi HEIF image decoder plugin

> +    (inputs
> +     `(("dav1d" ,dav1d)
> +       ("gdk-pixbuf" ,gdk-pixbuf) ;optional
> +       ("libaom" ,libaom)
> +       ("libde265" ,libde265)
> +       ("libjpeg" ,libjpeg-turbo)
> +       ("libpng" ,libpng)
> +       ("rav1e" ,rav1e)
> +       ("x265" ,x265)))

I wonder, are both libaom and rav1e mandatory dependencies?

I ask because they offer the same functionality (AV1 encoding), and it's
still a bit tricky to introduce Rust dependencies in Guix. Rav1e is
written in Rust, but we only support Rust on x86_64.