Eye of GNOME

Image Viewer
	Eye of GNOME 3.16
Developer(s)	The GNOME Project
Repository	gitlab.gnome.org/GNOME/eog.git ;
Written in	C (GTK+)
Operating system	Linux, BSDs, OS X, Microsoft Windows
Type	Image viewer
License	GNU General Public License
Website	wiki.gnome.org/Apps/EyeOfGnome

Eye of GNOME is the official image viewer for the GNOME desktop environment, where it is also known as Image Viewer. Unlike some other image viewers, Eye of GNOME will only display images. It does, however, provide basic effects for improved viewing, such as zooming, full-screen, rotation, and transparent image background control.

Eye of GNOME will eventually be replaced by a combination of Sushi and GNOME Photos.^[1]

File formats

Eye of GNOME supports the following file formats:

ANI – Animation
BMP – Windows Bitmap
Graphics Interchange Format (GIF)
ICO – Windows Icon
JPEG – Joint Photographic Experts Group
PCX – PC Paintbrush
Portable Network Graphics (PNG)
PNM – Portable Anymap from the PPM Toolkit
RAS – Sun Raster
Scalable Vector Graphics (SVG)
TGA – Targa
Tagged Image File Format (TIFF)
Wireless Application Protocol Bitmap Format (WBMP)
X BitMap (XBM)
X PixMap (XPM)

Eye of GNOME also supports the viewing of the Exif/XMP metadata associated with an image.

eog doesn't support webp

Criticism

Eye of GNOME was criticized^[who?] for its lack of GIF animation playback;^[2]^[3] however, this functionality was included in version 2.29.1.^[4]^[5]

Eye of GNOME used to render SVG (Scalable Vector Graphics) as a rasterized bitmap by default.^[6] This bitmap then gets manipulated when scaling the image, resulting in pixelation when zooming in.^[7] Since version 2.31.1, this too was fixed.^[8]