Fast image viewer
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Přemysl Eric Janouch a6972e4c6e
Don't hardcode the background colour
2 days ago
tools local file URIs only 2 weeks ago
wuffs-mirror-release-c@c9d2ed7983 Initial commit 1 month ago
.gitmodules Initial commit 1 month ago
LICENSE Initial commit 1 month ago
README.adoc Add a thumbnail loader 2 weeks ago
fastiv-io-benchmark.c Add a basic benchmarking tool 4 weeks ago
fastiv-io.c Add a thumbnail loader 2 weeks ago
fastiv-view.c Don't hardcode the background colour 2 days ago
fastiv-view.h Split out image loaders into fastiv-io.c 4 weeks ago
fastiv.c Don't hardcode the background colour 2 days ago
fastiv.desktop Enable directory browsing 2 weeks ago
fastiv.svg Add an icon and a desktop file 1 month ago Add a thumbnail loader 2 weeks ago
meson_options.txt Add RAW support using LibRaw 1 month ago



fastiv is a fast image viewer, supporting BMP, PNG, GIF, JPEG, and optionally RAW pictures.

It is meant to be a viable replacement for Eye of GNOME, which is slow, likes to break on huge pictures, and its underlying gdk-pixbuf can only be made to use the broken libopenraw as of now.

Further development

Urgent blockers for the first stable version:

  • directory browsing

  • implement zoom and scrolling

High priority:

  • some level of asynchronous loading and preloading, which becomes a difficult problem with network mounts, confusingly acting as fast devices

  • write a replacement for GNOME’s Nautilus in grid mode: read-only, with focus on staggered previews and minimising wasted space

Low priority:

  • display 16-bit pictures smoothly, using the 30-bit depth under

  • make RAW as fast as it can possibly be

  • load everything that resembles a picture, potentially even play video

  • port to something less hostile than the current GNOME stack, such as SDL, although it may involve a lot of reimplemented code, or result in reduced functionality


  • fancy UI, focus solely on speed of use

  • memory efficiency, though preloading can cause some pressure


Regular releases are sporadic. git master should be stable enough. You can get a package with the latest development version from Archlinux’s AUR.

Building and Running

Build dependencies: Meson, pkg-config
Runtime dependencies: gtk+-3.0, libpng > 1.5.4, libturbojpeg, LibRaw (optional), shared-mime-info

$ git clone --recursive
$ meson builddir
$ cd builddir
$ meson compile

To install the application, you can do:

# meson install

Contributing and Support

Use to report any bugs, request features, or submit pull requests. git send-email is tolerated. If you want to discuss the project, feel free to join me at ircs://, channel #dev.

Bitcoin donations are accepted at: 12r5uEWEgcHC46xd64tt3hHt9EUvYYDHe9


This software is released under the terms of the 0BSD license, the text of which is included within the package along with the list of authors.