vrapi: Add support for focus awareness;

Tuprules.tup

@@ -212,8 +212,7 @@ ifeq ($(PLATFORM),android)
     LDFLAGS_@(DATA) += -L$(ROOT)/build/lib_msdfgen -lmsdfgen
     LDFLAGS_@(PHYSICS) += -L$(ROOT)/build/ode -lode
     LDFLAGS_@(ENET) += -L$(ROOT)/build/enet -lenet
-    LDFLAGS_@(VRAPI) += -L$(VRAPI_LIB_PATH)
-    LDFLAGS_@(VRAPI) += -lvrapi
+    LDFLAGS_@(VRAPI) += -L$(VRAPI_LIB_PATH) -lvrapi
 
     LIBS_@(AUDIO) += $(ROOT)/build/openal/libopenal.*so*
     LIBS_@(PHYSICS) += $(ROOT)/build/ode/libode.so

src/modules/headset/headset_vrapi.c

@@ -1,4 +1,5 @@
 #include "headset/headset.h"
+#include "event/event.h"
 #include "graphics/canvas.h"
 #include "graphics/graphics.h"
 #include "core/maf.h"
@@ -413,6 +414,21 @@ static void vrapi_renderTo(void (*callback)(void*), void* userdata) {
 static void vrapi_update(float dt) {
   if (!state.session) return;
 
+  VRAPI_LARGEST_EVENT_TYPE event;
+  while (vrapi_PollEvent(&event.EventHeader) == ovrSuccess) {
+    switch (event.EventHeader.EventType) {
+      case VRAPI_EVENT_FOCUS_GAINED:
+        lovrEventPush((Event) { .type = EVENT_FOCUS, .data.boolean = { true } });
+        break;
+
+      case VRAPI_EVENT_FOCUS_LOST:
+        lovrEventPush((Event) { .type = EVENT_FOCUS, .data.boolean = { false } });
+        break;
+
+      default: break;
+    }
+  }
+
   state.frameIndex++;
   state.displayTime = vrapi_GetPredictedDisplayTime(state.session, state.frameIndex);
 

src/resources/AndroidManifest.xml

@@ -7,6 +7,7 @@
     <meta-data android:name="com.samsung.android.vr.application.mode" android:value="vr_only"/>
     <activity android:name="Activity">
       <meta-data android:name="android.app.lib_name" android:value="lovr"/>
+      <meta-data android:name="com.oculus.vr.focusaware" android:value="true"/>
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>
         <category android:name="android.intent.category.LAUNCHER"/>