progress commit: openxr + pipewire + refactor

src/main.rs

@@ -7,7 +7,11 @@ mod overlays;
 mod shaders;
 mod state;
 
-use crate::backend::openvr::openvr_run;
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc,
+};
+
 use env_logger::Env;
 
 fn main() {
@@ -18,5 +22,40 @@ fn main() {
         env!("CARGO_PKG_VERSION")
     );
 
-    openvr_run();
+    let running = Arc::new(AtomicBool::new(true));
+    let _ = ctrlc::set_handler({
+        let running = running.clone();
+        move || {
+            running.store(false, Ordering::Relaxed);
+        }
+    });
+
+    #[cfg(all(feature = "openxr", feature = "openvr"))]
+    auto_run(running);
+
+    #[cfg(all(feature = "openvr", not(feature = "openxr")))]
+    crate::backend::openvr::openvr_run(running);
+
+    #[cfg(all(feature = "openxr", not(feature = "openvr")))]
+    crate::backend::openxr::openxr_run(running);
+
+    #[cfg(not(any(feature = "openxr", feature = "openvr")))]
+    compile_error!("You must enable at least one backend feature (openxr or openvr)");
+}
+
+#[cfg(all(feature = "openxr", feature = "openvr"))]
+fn auto_run(running: Arc<AtomicBool>) {
+    use crate::backend::openvr::openvr_run;
+    use crate::backend::openxr::openxr_run;
+    use backend::common::BackendError;
+
+    let Err(BackendError::NotSupported) = openxr_run(running.clone()) else {
+        return;
+    };
+
+    let Err(BackendError::NotSupported) = openvr_run(running) else {
+        return;
+    };
+
+    log::error!("No supported backends found");
 }