GraphicsMagick (Image Processing System)

GraphicsMagick is the swiss army knife of image processing.
Provides a robust and efficient collection of tools and libraries
which support reading, writing, and manipulating an image in over
88 major formats including important formats like DPX, GIF, JPEG,
JPEG-2000, PNG, PDF, PNM, and TIFF.

This build includes PerlMagick (the Perl language bindings for
GraphicsMagick) and TclMagick (Tcl bindings). If you really need to,
you can disable these via PERL=no and/or TCL=no in the environment.

Optional dependencies: Some file formats require extra libraries. These
are all autodetected at build time:

jbigkit (.jbg, .jbig support)
dcraw (Raw camera files, various filename extensions)
hp2xx (HP-GL plotter language, .hp and .hpg)
ralcgm (Computer Graphics Metafile, .cgm)
libfpx (FlashPix, .fpx)
graphviz (.dot digraph files)
libjxl (.jxl, JPEG XL)
libheif (.heif .heifs .heic .heics .avci .avcs .avif .hif)

For convenience, there's an "alloptional.sqf" in the SlackBuild
directory that you can use to install all the optional dependencies,
plus their dependencies.