avoid steamvr overlay key collisions

wayvr/src/backend/openvr/lines.rs

@@ -88,7 +88,7 @@ impl LinePool {
                 ..Default::default()
             },
             ..OverlayWindowData::from_config(OverlayWindowConfig {
-                name: Arc::from(format!("wlx-line{id}")),
+                name: Arc::from(format!("line{id}")),
                 default_state: Default::default(),
                 active_state: Some(Default::default()),
                 z_order: Z_ORDER_LINES,

wayvr/src/backend/openvr/overlay.rs

@@ -34,7 +34,8 @@ impl OverlayWindowData<OpenVrOverlayData> {
         overlay: &mut OverlayManager,
         app: &mut AppState,
     ) -> anyhow::Result<OverlayHandle> {
-        let key = format!("wlx-{}", self.config.name);
+        let pid = std::process::id();
+        let key = format!("wlx-{pid}-{}", self.config.name);
         log::debug!("Create overlay with key: {}", &key);
         let handle = match overlay.create_overlay(&key, &key) {
             Ok(handle) => handle,