Displaying avif images with Gtk4

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Not tested but you could try this path:

  • given a image::DynamicImage you can convert it to RGB/RGBA using DynamicImage::to_rgb8/DynamicImage::to_rgba8
  • this can then be converted to a flat byte buffer
  • this is what Pixbuf::from_bytes takes
  • you should then be able to create a texture using gtk4::Texture::for_pixbuf

This should avoid re-encoding to jpg just for it to be immediately decoded again (along with a loss in precision).

Alternatively have you tried installing the libavif-gdk-pixbuf (Debian/Ubuntu) or avif-pixbuf-loader (Fedora) packages? It seems they should provide system-wide support for loading AVIF images in all GTK applications.

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