https://github.com/lbalazscs/Pixelitor
Pixelitor is an open source image editor with experimental adjustment layers, clone layers, vector layers and smart objects that are "stable" by normal standards.
All credit goes to Pixelitor's dev for making this bash file for me and making it possible to run external commands in Pixelitor. Below are the instructions for how to get GEGL working in Pixelitor.
1 Put the file in /home/USERNAME/.local/bin
2. You need GEGL installed on your system for this to work.
Fedora based Machines are
sudo dnf install gegl
Debian based machines are
sudo apt install gegl
3. You need the dev build of Pixelitor from the master branch. The latest release does not have the command line filter. You can easily learn to compile Pixelitor below https://github.com/lbalazscs/Pixelitor
after compiling enable experimental features in Pixelitors "preferences" menu. This will also enable non-destructive smart objects and adjustment layers.
4. Make sure every GEGL filter ends with "crop" at the end. Gimp does this automatically when it runs native GEGL filters but Pixelitor does not.
GEGL in Pixelitor only works through typed syntax not any GUI filters like Gimp. So it is advised to learn GEGL syntax at https://gegl.org/operations/ I am a person who is well versed in writing GEGL syntax. So maybe this will inspire others to write GEGL syntax themselves considering is fully non-destructive and can be combined with native Pixelitor and a few GMIC filters which have GUIs.
If you know me, I'm beaver the guy who makes GEGL plugins for Gimp, but not all GEGL plugins of mine work in Pixelitor because they depend on gimp: name space operations
like gimp:layer-mode layer-mode=hsl-color Pixelitor just ignores those GEGL nodes because they are technically GEGL Gimp hybrid filters not 100% GEGL
https://github.com/LinuxBeaver/Special_Gimp_Plugins_for_GEGL_command.py/releases
I know it doesn't make sense to provide python callable GEGL plugins of mine at first, but these GEGL plugins of mine are 100% GEGL and do not depend on Gimp: operations.
Python and any external app; such as Pixelitor. ONLY GIMP IS CAPABLE OF READING gimp: namespace plugins and these plugins linked here are guaranteed to work in Pixelitor.
The others outside of a few new ones likely will not. You can find the properties of my GEGL plugins by reading their source code.
glossy-balloon gaus=4 hue=52 ect...
Linux /home/(USERNAME)/.local/share/gegl-0.4/plug-ins
Gimp and system GEGL will also be able to find these plugins.
Pic of an adjustment layer of GEGL syntax Pixelitor modifying Text.
Picture of GEGL GMIC and native Pixelitor filters fused together to make fancy text styles
Gaussian Blur
pgegl
gaussian-blur std-dev-x=4 std-dev-y=4
crop
Bloom
pgegl
bloom threshold=50 softness=25 radius=10 strength=50 limit-exposure=false
crop
GEGL Denoise + Soft Glow + Saturation + Sharpen all together
pgegl
denoise-dct sigma=2
softglow glow-radius=7 brightness=0.25 sharpness=0.6
saturation scale=1.3
unsharp-mask scale=0.35
crop
Layer Effects (this one is actually advance and chains many filters Including emboss inside a composer
pgegl
gaussian-blur std-dev-x=2 std-dev-y=2
id=1 hard-light aux=[ ref=1 emboss depth=10 elevation=20 opacity value=0.4 ]
opacity value=3
median-blur radius=0
dropshadow x=0 y=0 radius=0 grow-radius=5 opacity=1 color=#000000
dropshadow x=0 y=0 radius=0 grow-radius=3 opacity=1 color=#ffffff
dropshadow x=0 y=0 opacity=1.7 color=#1900ff
crop
Everything including text is editable
