test playspace offset availability

wayvr/src/backend/openxr/mod.rs

@@ -95,6 +95,11 @@ pub fn openxr_run(
     app.monado_state_init();
 
     let mut space_mover = playspace::PlayspaceMover::new();
+    if let Some(m) = app.monado_state.as_mut() {
+        // Test whether current playspace offset can be queried and log an error if it fails.
+        // `space_mover` can be used regardless and will start working if the playspace offset becomes available later.
+        space_mover.test_availability(&mut m.ipc);
+    };
 
     let mut blocker = app
         .monado_state

wayvr/src/backend/openxr/playspace.rs

@@ -244,6 +244,12 @@ impl PlayspaceMover {
             .set_reference_space_offset(ReferenceSpaceType::Stage, pose)
             .inspect_err(|e| log::warn!("Could not fix floor due to libmonado error: {e:?}"));
     }
+
+    pub fn test_availability(&mut self, monado: &mut Monado) {
+        let _ = monado
+            .get_reference_space_offset(ReferenceSpaceType::Stage)
+            .log_err("Space drag may not be available");
+    }
 }
 
 fn get_offset(monado: &mut Monado) -> Result<Affine3A, libmonado::MndResult> {