Add support for Oculus Focus Awareness

app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp

@@ -101,6 +101,7 @@ struct DeviceDelegateOculusVR::State {
   vrb::Color clearColor;
   float near = 0.1f;
   float far = 100.f;
+  bool hasEventFocus = true;
   std::vector<ControllerState> controllerStateList;
   crow::ElbowModelPtr elbow;
   ControllerDelegatePtr controller;
@@ -330,6 +331,13 @@ struct DeviceDelegateOculusVR::State {
       controllerState.enabled = false;
     }
 
+    if (!hasEventFocus) {
+      for (ControllerState& controllerState: controllerStateList) {
+        controller->SetVisible(controllerState.index, controllerState.enabled);
+      }
+      return;
+    }
+
     uint32_t count = 0;
     ovrInputCapabilityHeader capsHeader = {};
     while (vrapi_EnumerateInputDevices(ovr, count++, &capsHeader) >= 0) {
@@ -397,6 +405,10 @@ struct DeviceDelegateOculusVR::State {
       return;
     }
 
+    if (!hasEventFocus) {
+      return;
+    }
+
     for (ControllerState& controllerState: controllerStateList) {
       if (controllerState.deviceId == ovrDeviceIdType_Invalid) {
         continue;
@@ -794,6 +806,30 @@ DeviceDelegateOculusVR::SetCPULevel(const device::CPULevel aLevel) {
 
 void
 DeviceDelegateOculusVR::ProcessEvents() {
+  ovrEventDataBuffer eventDataBuffer = {};
+  ovrEventHeader* eventHeader = (ovrEventHeader*)(&eventDataBuffer);
+  // Poll for VrApi events at regular frequency
+  while (vrapi_PollEvent(eventHeader) == ovrSuccess) {
+
+    switch (eventHeader->EventType) {
+      case VRAPI_EVENT_FOCUS_GAINED:
+        // FOCUS_GAINED is sent when the application is in the foreground and has
+        // input focus. This may be due to a system overlay relinquishing focus
+        // back to the application.
+        m.hasEventFocus = true;
+        break;
+      case VRAPI_EVENT_FOCUS_LOST:
+        // FOCUS_LOST is sent when the application is no longer in the foreground and
+        // therefore does not have input focus. This may be due to a system overlay taking
+        // focus from the application. The application should take appropriate action when
+        // this occurs.
+        m.hasEventFocus = false;
+        break;
+      default:
+        break;
+    }
+  }
+
   ovrMessageHandle message;
   while ((message = ovr_PopMessage()) != nullptr) {
     switch (ovr_Message_GetType(message)) {
@@ -879,8 +915,6 @@ DeviceDelegateOculusVR::StartFrame(const FramePrediction aPrediction) {
   ovrMatrix4f matrix = vrapi_GetTransformFromPose(&m.predictedTracking.HeadPose.Pose);
   vrb::Matrix head = vrb::Matrix::FromRowMajor(matrix.M[0]);
 
-
-
   if (m.renderMode == device::RenderMode::StandAlone) {
     head.TranslateInPlace(kAverageHeight);
   }

app/src/oculusvrArmDebug/AndroidManifest.xml

@@ -5,8 +5,9 @@
     <uses-permission android:name="android.permission.CAMERA" tools:node="remove"/>
     <uses-permission android:name="${permissionToRemove}" tools:node="remove" />
     <application>
-        <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_only"/>
+        <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_only" />
         <activity android:name=".VRBrowserActivity" android:screenOrientation="landscape">
+            <meta-data android:name="com.oculus.vr.focusaware" android:value="true" />
             <meta-data android:name="android.app.lib_name" android:value="native-lib" />
         </activity>
     </application>

app/src/oculusvrArmRelease/AndroidManifest.xml

@@ -30,6 +30,7 @@
             android:supportsPictureInPicture="false"
             tools:node="replace"
             >
+            <meta-data android:name="com.oculus.vr.focusaware" android:value="true" />
             <meta-data android:name="android.app.lib_name" android:value="native-lib" />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />