Quartus Dark Theme on Linux - Solution

I have a solution for setting up a dark theme for Quartus Prime 25 on Linux (Mint) and setup a Github repo. The program modifies the stylesheet using a Rust program. 

https://github.com/saturn77/quartus-dark-linux

This repo allows running Altera Quartus on Linux with a dark theme, providing a modern look while being easy on the eyes for Linux users. There are some dark stylesheets for Windows, but those simply will not work on Linux.

Quartus's argument parser intercepts -stylesheet before Qt can process it on Linux. This project uses a small Rust LD_PRELOAD library to hook QApplication::exec() and inject the stylesheet directly via Qt's setStyleSheet() API.

Tested with Quartus Prime Pro 25.3.1 (Qt 6.5.7) on Linux Mint 22.3 Cinnamon.