2 files changed, 16 insertions, 3 deletions
diff --git a/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceFactory.java b/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceFactory.java
index ffe1371a4..21d6cab7b 100644
--- a/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceFactory.java
+++ b/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceFactory.java
@@ -43,6 +43,10 @@ public class OVRStereoDeviceFactory extends StereoDeviceFactory {
         return false;
     }
 
+    private void dumpCaps(final ovrHmdDesc hmdDesc, final int deviceIndex) {
+        System.err.println(OVRVersion.getAvailableCapabilitiesInfo(hmdDesc, deviceIndex, null).toString());
+    }
+
     @Override
     public final StereoDevice createDevice(final int deviceIndex, final StereoDeviceConfig config, final boolean verbose) {
         final ovrHmdDesc hmdDesc = OVR.ovrHmd_Create(deviceIndex);
@@ -53,10 +57,16 @@ public class OVRStereoDeviceFactory extends StereoDeviceFactory {
             }
             return null;
         }
-        final OVRStereoDevice ctx = new OVRStereoDevice(this, hmdDesc, deviceIndex);
+        final int hmdCaps = hmdDesc.getHmdCaps();
+        if( 0 == ( hmdCaps & OVR.ovrHmdCap_ExtendDesktop ) ) {
+            System.err.println("Device "+deviceIndex+" is not in ExtendDesktop mode as required.");
+            dumpCaps(hmdDesc, deviceIndex);
+            return null;
+        }
         if( verbose ) {
-            System.err.println(OVRVersion.getAvailableCapabilitiesInfo(ctx.hmdDesc, deviceIndex, null).toString());
+            dumpCaps(hmdDesc, deviceIndex);
         }
+        final OVRStereoDevice ctx = new OVRStereoDevice(this, hmdDesc, deviceIndex);
         return ctx;
     }
 }
diff --git a/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceRenderer.java b/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceRenderer.java
index ff15d38d1..60fb8301e 100644
--- a/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceRenderer.java
+++ b/src/oculusvr/classes/jogamp/opengl/oculusvr/OVRStereoDeviceRenderer.java
@@ -386,6 +386,7 @@ public class OVRStereoDeviceRenderer implements StereoDeviceRenderer {
 
     private ShaderProgram sp;
     private ovrFrameTiming frameTiming;
+    private int frameCount;
 
     @Override
     public String toString() {
@@ -440,6 +441,7 @@ public class OVRStereoDeviceRenderer implements StereoDeviceRenderer {
         eyes[1] = new OVREye(context.hmdDesc, this.distortionBits, eyePositionOffset, eyeRenderDescs[1], ovrTexture1Size, eyeViewports[1]);
         sp = null;
         frameTiming = null;
+        frameCount = 0;
     }
 
     @Override
@@ -550,7 +552,7 @@ public class OVRStereoDeviceRenderer implements StereoDeviceRenderer {
 
     @Override
     public final void beginFrame(final GL gl) {
-        frameTiming = OVR.ovrHmd_BeginFrameTiming(context.hmdDesc, 0);
+        frameTiming = OVR.ovrHmd_BeginFrameTiming(context.hmdDesc, 0); // ovrHmd_GetFrameTiming not used, otherwise: frameCount);
     }
 
     @Override
@@ -560,6 +562,7 @@ public class OVRStereoDeviceRenderer implements StereoDeviceRenderer {
         }
         OVR.ovrHmd_EndFrameTiming(context.hmdDesc);
         frameTiming = null;
+        frameCount++;
     }
 
     @Override