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////////////////////////////////////////////////////////////////////////////
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//        File:                GlobalUtil.h
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//        Author:                Changchang Wu
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//        Description : 
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//                GlobalParam:        Global parameters
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//                ClockTimer:                Timer 
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//                GlobalUtil:                Global Function wrapper
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//
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//        Copyright (c) 2007 University of North Carolina at Chapel Hill
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//        All Rights Reserved
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//
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//        Permission to use, copy, modify and distribute this software and its
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//        documentation for educational, research and non-profit purposes, without
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//        fee, and without a written agreement is hereby granted, provided that the
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//        above copyright notice and the following paragraph appear in all copies.
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//
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//        The University of North Carolina at Chapel Hill make no representations
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//        about the suitability of this software for any purpose. It is provided
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//        'as is' without express or implied warranty. 
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//
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//        Please send BUG REPORTS to ccwu@cs.unc.edu
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//
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////////////////////////////////////////////////////////////////////////////
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#ifndef _GLOBAL_UTILITY_H
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#define _GLOBAL_UTILITY_H
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//wrapper for some shader function
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//class ProgramGPU;
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class LiteWindow;
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class GlobalParam
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{
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public:
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        static GLuint        _texTarget;
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        static GLuint   _iTexFormat;
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        static int                _texMaxDim;
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        static int                _texMaxDimGL; 
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    static int      _texMinDim;
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        static int                _verbose;
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        static int                _timingS;
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        static int                _timingO;
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        static int                _timingL;
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        static int                _usePackedTex;
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        static int                _BetaFilter;
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        static int                _IsNvidia;
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        static int                _UseCUDA;
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    static int      _UseOpenCL;
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        static int                _UseDynamicIndexing; 
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        static int                _debug;
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        static int                _MaxFilterWidth;
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        static float        _FilterWidthFactor;
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        static float    _OrientationWindowFactor;
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        static float        _DescriptorWindowFactor; 
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        static int                _MaxOrientation;
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        static int      _OrientationPack2;
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        static int                _ListGenGPU;
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        static int                _ListGenSkipGPU;
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        static int                _SupportNVFloat;
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        static int                _SupportTextureRG;
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        static int                _FullSupported;
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        static float        _MaxFeaturePercent;
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        static int                _MaxLevelFeatureNum;
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        static int                _DescriptorPPR; 
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        static int                _DescriptorPPT; //pixel per texture for one descriptor
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        static int                _FeatureTexBlock;
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        static int                _NarrowFeatureTex; //implemented but no performance improvement
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        static int                _SubpixelLocalization;
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        static int                _ProcessOBO; //not implemented yet
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    static int      _TruncateMethod;
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        static int                _PreciseBorder; //implemented
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        static int                _UseSiftGPUEX;
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        static int                _ForceTightPyramid;
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        static int                _octave_min_default;
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        static int                _octave_num_default;
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        static int                _InitPyramidWidth;
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        static int                _InitPyramidHeight;
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        static int                _PreProcessOnCPU;
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        static int                _GoodOpenGL;
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        static int                _FixedOrientation;
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        static int                _LoweOrigin;
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        static int                _ExitAfterSIFT; 
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        static int                _NormalizedSIFT;
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        static int                _BinarySIFT;
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        static int                _KeepExtremumSign;
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        static int                _FeatureCountThreshold;
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    static int      _KeyPointListForceLevel0;
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        //for compatable with old version:
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        static float        _OrientationExtraFactor;
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        static float        _OrientationGaussianFactor;
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        static float    _MulitiOrientationThreshold;
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        ////////////////////////////////////////
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        static int                                _WindowInitX;
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        static int                                _WindowInitY;
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        static const char*                _WindowDisplay;
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    static int              _DeviceIndex; 
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};
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class ClockTimer
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{
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private:
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        char _current_event[256];
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        int  _time_start;
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        int  _time_stop;
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public:
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        static int          ClockMS();
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        static double CLOCK();
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        static void          InitHighResolution();
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        void StopTimer(int verb = 1);
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        void StartTimer(const char * event, int verb=0);
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        float  GetElapsedTime();
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};
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class GlobalUtil:public GlobalParam
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{
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    static ClockTimer _globalTimer;                             
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public:
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        inline static double CLOCK()                                {        return ClockTimer::CLOCK();                        }
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        inline static void StopTimer()                                {        _globalTimer.StopTimer(_timingS);                        }
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        inline static void StartTimer(const char * event)        {        _globalTimer.StartTimer(event, _timingO);        }
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        inline static float GetElapsedTime()                {        return _globalTimer.GetElapsedTime();                }
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        static void FitViewPort(int width, int height);
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        static void SetTextureParameter();
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        static void SetTextureParameterUS();
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#ifdef _DEBUG
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        static void CheckErrorsGL(const char* location = NULL);
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#else
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        static void inline CheckErrorsGL(const char* location = NULL){};
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#endif
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        static bool CheckFramebufferStatus();
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        //initialize Opengl parameters
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        static void InitGLParam(int NotTargetGL = 0);
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        static void SetGLParam();
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        static int  CreateWindowEZ();
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        static void CleanupOpenGL();
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    static void SetDeviceParam(int argc, char** argv);
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    static int  CreateWindowEZ(LiteWindow* window);
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};
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#if defined(_MSC_VER) && _MSC_VER == 1200
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#define max(a,b)    (((a) > (b)) ? (a) : (b))
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#define min(a,b)    (((a) < (b)) ? (a) : (b))
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#endif
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#endif
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