rgbe is both an executable binary that can be run, and a library that can be used in Rust programs.
Installing the hdr2rgbe-png executable
Assuming you have Rust/Cargo installed, run this command in a terminal:
cargo install rgbe
It will make the hdr2rgbe-png command available in your PATH if you've allowed the PATH to be modified when installing Rust. cargo uninstall rgbe uninstalls.
Adding rgbe library as a dependency
Run this command in a terminal, in your project's directory:
cargo add rgbe
To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:
rgbe = "0.0.2"
The rgbe library will be automatically available globally.
Read the rgbe library documentation.