include ovr mobile sdk and test it

cmake/android/AndroidManifest.xml.in

@@ -6,12 +6,12 @@
   <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="@string/AppDisplayName" android:icon="@drawable/icon">
     
     <!-- VR MODE -->
-    <!-- <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_dual"/> -->
+    <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_dual"/>
     
     <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|locale|fontScale|keyboard|keyboardHidden|navigation"
               android:name="org.qtproject.qt5.android.bindings.QtActivity"
               android:label="@string/AppDisplayName"
-              android:screenOrientation="unspecified"
+              android:screenOrientation="landscape"
               android:launchMode="singleTop"
               ${ANDROID_APK_THEME}>
       <intent-filter>
@@ -44,15 +44,15 @@
       <!--
       <meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/logo"/>
       -->
-      <!-- Splash screen -->
+        
     </activity>
     
-    <!-- <activity android:name="com.oculusvr.vrlib.PlatformActivity"
+    <activity android:name="com.oculusvr.vrlib.PlatformActivity"
               android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"
               android:launchMode="singleTask"
               android:screenOrientation="landscape"
-              android:configChanges="screenSize|orientation|keyboardHidden|keyboard"> -->
+              android:configChanges="screenSize|orientation|keyboardHidden|keyboard">
-    <!-- </activity> -->
+    </activity>
     
   </application>
   <uses-sdk android:minSdkVersion="${ANDROID_API_LEVEL}" android:targetSdkVersion="${ANDROID_API_LEVEL}"/>

gvr-interface/CMakeLists.txt

@@ -19,12 +19,17 @@ set(ANDROID_API_LEVEL 19)
 set(ANDROID_APK_PACKAGE io.highfidelity.gvrinterface)
 
 # we need VRLib, so add a project.properties to our apk build folder that says that
-# find_path(_OCULUS_VRLIB_DIR NAME VRLib.vcxproj HINTS "/ovr_mobile_sdk/VRLib/")
+find_path(_OCULUS_VRLIB_DIR NAME VRLib.vcxproj HINTS "/ovr_mobile_sdk/VRLib/")
-# if (NOT _OCULUS_VRLIB_DIR)
+if (NOT _OCULUS_VRLIB_DIR)
-#   message(FATAL_ERROR "Could not find Oculus Mobile SDK VRLib.")
+  message(FATAL_ERROR "Could not find Oculus Mobile SDK VRLib.")
-# endif()
+endif()
 
-# file(RELATIVE_PATH RELATIVE_VRLIB_PATH ${ANDROID_APK_OUTPUT_DIR} "${_OCULUS_VRLIB_DIR}")
+file(RELATIVE_PATH RELATIVE_VRLIB_PATH ${ANDROID_APK_OUTPUT_DIR} "${_OCULUS_VRLIB_DIR}")
-# file(WRITE "${ANDROID_APK_BUILD_DIR}/project.properties" "android.library.reference.1=${RELATIVE_VRLIB_PATH}")
+
+include_directories(SYSTEM "${_OCULUS_VRLIB_DIR}/jni")
+include_directories(SYSTEM "${_OCULUS_VRLIB_DIR}/jni/LibOVR/Include")
+include_directories(SYSTEM "${_OCULUS_VRLIB_DIR}/jni/LibOVR/Src")
+
+file(WRITE "${ANDROID_APK_BUILD_DIR}/project.properties" "android.library.reference.1=${RELATIVE_VRLIB_PATH}")
 
 qt_create_apk()

gvr-interface/src/GVRInterface.cpp

@@ -11,6 +11,11 @@
 
 #include <QtWidgets/QMenuBar>
 
+#include <OVR.h>
+#include <VrApi/VrApi.h>
+#include <VrApi/VrApi_local.h>
+#include <VrApi/LocalPreferences.h>
+
 #include "GVRMainWindow.h"
 #include "RenderingClient.h"
 
@@ -20,4 +25,55 @@ GVRInterface::GVRInterface(int argc, char* argv[]) :
     QApplication(argc, argv)
 {
     _client = new RenderingClient(this);
+    
+    connect(this, &QGuiApplication::applicationStateChanged, this, &GVRInterface::handleApplicationStateChange);
+}
+
+void GVRInterface::handleApplicationStateChange(Qt::ApplicationState state) {
+    switch(state) {
+        case Qt::ApplicationActive:
+            qDebug() << "The application is active.";
+            resumeOVR();
+            break;
+        case Qt::ApplicationSuspended:
+            qDebug() << "The application is being suspended.";
+            pauseOVR();
+            break;
+        default:
+            break;
+    }
+}
+
+void GVRInterface::resumeOVR() {
+    // Reload local preferences, in case we are coming back from a
+    // switch to the dashboard that changed them.
+    ovr_UpdateLocalPreferences();
+    
+    // Default vrModeParms
+    ovrModeParms vrModeParms;
+    ovrHmdInfo hmdInfo;
+    
+    vrModeParms.AsynchronousTimeWarp = true;
+    vrModeParms.AllowPowerSave = true;
+    vrModeParms.DistortionFileName = NULL;
+    vrModeParms.EnableImageServer = false;
+    vrModeParms.CpuLevel = 2;
+    vrModeParms.GpuLevel = 2;
+    vrModeParms.GameThreadTid = 0;
+    
+    const char* cpuLevelStr = ovr_GetLocalPreferenceValueForKey( LOCAL_PREF_DEV_CPU_LEVEL, "-1" );
+    const int cpuLevel = atoi( cpuLevelStr );
+    if ( cpuLevel >= 0 ) {
+        vrModeParms.CpuLevel = cpuLevel;
+        qDebug() << "Local Preferences: Setting cpuLevel" << vrModeParms.CpuLevel;
+    }
+    
+    const char* gpuLevelStr = ovr_GetLocalPreferenceValueForKey( LOCAL_PREF_DEV_GPU_LEVEL, "-1" );
+    const int gpuLevel = atoi( gpuLevelStr );
+    if ( gpuLevel >= 0 ) {
+        vrModeParms.GpuLevel = gpuLevel;
+        qDebug() << "Local Preferences: Setting gpuLevel" << vrModeParms.GpuLevel;
+    }
+    
+    ovr_EnterVrMode(vrModeParms, &hmdInfo);
 }

gvr-interface/src/GVRInterface.h

@@ -28,7 +28,12 @@ public:
       
     RenderingClient* getClient() { return _client; }
     
+private slots:
+    void handleApplicationStateChange(Qt::ApplicationState state); 
 private:
+    void resumeOVR();
+    void pauseOVR(); 
+    
     RenderingClient* _client;
 };