pixelsort

A custom GEGL operation (and by extension GIMP filter) that implements a pixel sorting effect. To use it click "Tools->GEGL Operation" and choose "Pixel Sort" in the dropdown.

This is primarily a port of the following processing script to a GEGL operation: https://github.com/kimasendorf/ASDFPixelSort

Install

Linux

Download https://github.com/EvergreenTheTree/pixelsort/releases/download/v1.0.0/pixelsort.so and put it in ~/.local/share/gegl-0.4/plug-ins

If you have an ancient GIMP / GEGL version you may need to put it in ~/.local/share/gegl-0.3/plug-ins.

NOTE: as of writing this pixelsort seems to not work with gegl-0.3 in GIMP. It works when run with the GEGL command line utility but for some reason none of the operation's properties show up in the GEGL tool window.

Windows

Download https://github.com/EvergreenTheTree/pixelsort/releases/download/v1.0.0/pixelsort.dll and put it in one of these directories depending on how / where GIMP is installed:

• GIMP 3.xx installed locally: C:\Users\$USER\AppData\Local\Programs\GIMP 3\lib\gegl-0.4\
• GIMP 3.xx installed system-wide: C:\Program Files\GIMP 3\lib\gegl-0.4\
• GIMP 2.xx: C:\Program Files\GIMP 2\lib\gegl-0.4\

Compile

Linux

To compile and install you will need the GEGL header files (libgegl-dev on Debian based distributions or gegl on Arch Linux), meson (meson on most distributions), and some C compiler (gcc, clang, etc).

meson setup --buildtype=release build
ninja -C build
cp build/pixelsort.so ~/.local/share/gegl-0.4/plug-ins
# Or this for older GEGL (does not work in GIMP, just the GEGL command line tool)
cp build/pixelsort.so ~/.local/share/gegl-0.3/plug-ins

Windows

The easiest way to compile this project on Windows is by using msys2. Download and install it from here: https://www.msys2.org/

Open a msys2 terminal with C:\msys64\mingw64.exe. Run the following to install required build dependencies:

pacman --noconfirm -S base-devel mingw-w64-clang-x86_64-toolchain mingw-w64-clang-x86_64-meson mingw-w64-clang-x86_64-python mingw-w64-clang-x86_64-gegl

Then build:

export PATH=/clang64/bin/:"$PATH"
meson setup --buildtype=release build
ninja -C build

To install it, copy the resulting DLL (build/pixelsort.dll) to the folder where GIMP finds GEGL operations:

GIMP 3.xx:

# If GIMP 3.0 is installed locally (via chocolatey for instance)
cp build/pixelsort.dll '/c/Users/$USER/AppData/Local/Programs/GIMP 3/lib/gegl-0.4/'
# If GIMP 3.0 is installed system-wide
cp build/pixelsort.dll '/c/Program Files/GIMP 3/lib/gegl-0.4/'
# If GIMP 2.0 is installed
cp build/pixelsort.dll '/c/Program Files/GIMP 2/lib/gegl-0.4/

Example Images

Original image:

Vertical sorting with luminance as the mode:

Horizontal sorting with white level as the mode:

Complete vertical sorting by luminance (threshold of 0):