qiv (Quick Image Viewer)

Quick Image Viewer (qiv) is a very small and pretty fast GDK/Imlib
image viewer. Features include zoom, maxpect, scale down, fullscreen,
brightness/contrast/gamma correction, slideshow, pan with keyboard
and mouse, rotate left/right, flip, delete (move to .qiv-trash/),
jump to image x, jump forward/backward x images, filename filter, and
you can use qiv to set your X11-Desktop background.

These formats are supported by default:

GIF TIFF XPM PNG PPM PNM PGM BMP JPEG SVG ICO TGA ICNS

Optional supported formats:

Format                 | Optional dependenc(y|ies)
-----------------------+-----------------------------------------------
PCX                    | pcx-pixbuf-loader
-----------------------+-----------------------------------------------
PSD (PhotoShop native) | gdk-pixbuf-psd
-----------------------+-----------------------------------------------
WEBP                   | libwebp imlib2 webp-pixbuf-loader. Build and
                       | install *in that order*.
-----------------------+-----------------------------------------------
WMF (Windows metafile) | wmf-pixbuf-loader
-----------------------+-----------------------------------------------
XCF (Gimp native)      | xcf-pixbuf-loader
-----------------------+-----------------------------------------------

These are runtime dependencies, so they can be installed at any time
without rebuilding qiv.

To easily build all the optional dependencies, use sbopkg with the
qiv-allfmt.sqf in the SlackBuild directory.