Install GTK Photo Ai Upscaler:
==============================
Install (flathub):
flatpak install flathub io.gitlab.theevilskeleton.Upscaler

Uninstall (flathub):
flatpak remove flathub io.gitlab.theevilskeleton.Upscaler
-----------------------------------------------------------
Build:
git clone --recursive https://gitlab.com/TheEvilSkeleton/Upscaler.git
cd Upscaler
sudo apt install blueprint-compiler libgtk-4-dev libadwaitaqt-dev libadwaitaqt1 libadwaita-1-dev appstream-util
./build_dev.sh
sudo ./install.sh

*You will need to Vulkan for Python by installing this software:
../Drivers/Build & Install a 'Python binding for Vulkan API'.txt

----------------------------------------------------------------
Sources:
https://www.omgubuntu.co.uk/2022/11/upscaler-open-source-ai-image-upscale-app-for-linux
https://gitlab.com/TheEvilSkeleton/Upscaler
https://askubuntu.com/questions/1154986/valueerror-namespace-gtk-not-available
https://askubuntu.com/questions/1385690/how-to-satisfy-libadwaita-1-build-dependency-in-gnome-meson

Date in Vivaldi (Binary Install): November 20th 2022
Date (Build): February 7th 2023