Timer.h

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//
//  DebugLogger.h
//
//  Created by Mathias Thöny on 27.12.11.
//  Copyright (c) 2011 University of Zurich. All rights reserved.
//

#ifndef GlobeEngine_Timer_h
#define GlobeEngine_Timer_h


#include "OpenGL_Includes.h"
#include <string>
#include <ctime>

namespace ge {
    class Timer
    {
    public:
    public:
        Timer();
        ~Timer();
        void clear();
        void create(bool _showAsFPS = false);
        
        // Simple c timer
        void start();
        void start(std::string _inTitle);
        void stop();
        void stop(std::string _outTitle);
        void stopAndRestart(std::string _outTitle);
        double getElapsedTime();
        bool isRunning();

        // Simple gpu timer
        void startGPUClock();
        void stopGPUClock();
        GLint64 stopAndShowGPUClock(std::string _outTitle = "");
        
#ifndef __APPLE__

        // single asynchronous query handling
        void startSingleAsynchronousQuery();
        void stopSingleAsynchronousQuery();
        GLint64 getSingleAsynchronousQueryResult();
        
        // multipe asynchronous queries with timestamps
        GLuint64 getResult(int _id);
        const GLuint64* getAllResults(int _id);
        
        int getQueryCount();
        void generateTimerQuery(int _count);
        void setTimestampForQuery(int _id);
#endif
    private:
        // multiple asynchronous queries
        GLuint* timerQuery;
        GLuint64* timerResult;
        int queryCount;
        
        // single asynchronous query
        GLuint singleAsyncQuery;
        GLuint64 singleAsyncResult;
        
        // simple timer
        GLint64 startTime;
        GLint64 endTime;
        
        // simple c timer
        clock_t startCTimer;
        clock_t finishCTimer;
        double elapsedTimeCTimer;
        bool running;
        bool fpsViewer;
    };
}
#endif