export global RendererSettings {
    in property <string> preferred: "cpu";
    in property <string> active: "cpu";
    in property <bool> gpu-supported: false;
    in property <bool> available: true;
    in property <string> error;
    // GPU startup failed, so this process fell back to CPU.
    in property <bool> gpu-failed: false;
    out property <bool> restart-required: RendererSettings.gpu-supported && RendererSettings.preferred != RendererSettings.active;
    callback choose(string);
}