cleaned code, added pinch gesture detector, better opengl context handling, fixed issues

Change-Id: I26a28374ae74391204586b4584d03cf0c58772c2

ndk/sources/android/helper/perfMonitor.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef PERFMONITOR_H_
+#define PERFMONITOR_H_
+
+#include <jni.h>
+#include <errno.h>
+#include <time.h>
+#include "JNIHelper.h"
+
+const int32_t NUM_SAMPLES = 100;
+
+/******************************************************************
+ * Helper class for a performance monitoring and get current tick time
+ */
+class perfMonitor {
+private:
+    float _fCurrentFPS;
+    time_t _tvLastSec;
+
+    double _dLastTick;
+    int32_t  _tickindex;
+    double _ticksum;
+    double _ticklist[ NUM_SAMPLES ];
+
+    double updateTick(double currentTick);
+public:
+    perfMonitor();
+    virtual ~perfMonitor();
+
+    bool update(float &fFPS);
+
+    static double getCurrentTime()
+    {
+        struct timeval Time;
+        gettimeofday( &Time, NULL );
+        double dTime = Time.tv_sec + Time.tv_usec * 1.0/1000000.0;
+        return dTime;
+    }
+};
+
+#endif /* PERFMONITOR_H_ */