statistics.h

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/*! \file
  \brief  The disti::Statistics class.  Tracks and displays runtime performance.

  \par Copyright Information

  Copyright (c) 2017 by The DiSTI Corporation.<br>
  11301 Corporate Blvd; Suite 100<br>
  Orlando, Florida 32817<br>
  USA<br>
  <br>
  All rights reserved.<br>

  This Software contains proprietary trade secrets of DiSTI and may not be
reproduced, in whole or part, in any form, or by any means of electronic,
mechanical, or otherwise, without the written permission of DiSTI.  Said
permission may be derived through the purchase of applicable DiSTI product
licenses which detail the distribution rights of this content and any
Derivative Works based on this or other copyrighted DiSTI Software.

  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
AND ANY USE OF THIS SOFTWARE PRODUCT IS AT YOUR OWN RISK. TO THE MAXIMUM EXTENT
PERMITTED BY APPLICABLE LAW, DISTI AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES
AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT, WITH REGARD TO THE SOFTWARE.

  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
IN NO EVENT SHALL DISTI OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
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*/
#ifndef STATISTICS_H
#define STATISTICS_H

#include "group.h"
#include "timer.h"
#include "glpolygon.h"
#include "display_frame.h"
#ifdef GLES
#include "gls_quad_storage.h"
#endif

namespace disti
{

/** Provides basic runtime performance statistics.
  * Functionality is built into glsDisplayFrame
  */
class Statistics : public Group
{
private:
    typedef struct
    {
      unsigned long startTime;    /** Absolute (from start of program) uS */
      unsigned long drawTime;     /** Relative (from start of draw) uS  */
      unsigned long preDrawTime;  /** Relative (from start of predraw) uS */
      unsigned long calculateTime;  /** Relative (from start of calculate) uS */
    } frameDataType;
    frameDataType *historyArray;
    Vertex *drawLineVerts;
    Vertex *preDrawLineVerts;
    Vertex *calculateLineVerts;
    Vertex *hzLineVerts;
    unsigned int numFrames;
    unsigned long _frameInterval;
    int historyState;
    int drawState;
    Timer longTimer;
    Timer shortTimer;
    DisplayFrame *parentDisplay;
    unsigned int currentIndex;
    unsigned int NextIndex(int index);
    unsigned int PrevIndex(int index);
    float _initialWidth;
    float _initialHeight;
    bool _textVisible;

#ifdef GLES
    GlsQuadListVCT_2D _textQuadStorage;
    GlsQuadListVC_3D  _graphQuadStorage;
#endif

public:
    /** The current average frame rate in updates per second */
    float averageHz;

    Group *statsGraphGroup;
    GLPolygon *statsGraphLine;
    GLPolygon *statsPreDrawGraphLine;
    GLPolygon *statsCalculateGraphLine;
    GLPolygon *statsHzLine;
    GLPolygon *statsBox;
    GLPolygon *statsTargetLine;

    GLS_EXPORT Statistics( DisplayFrame* display, unsigned int numFrames, unsigned long frameInterval );
    virtual GLS_EXPORT ~Statistics();

    virtual GLS_EXPORT void RecordDrawStart();
    virtual GLS_EXPORT void RecordDrawEnd();
    virtual GLS_EXPORT void RecordPreDrawStart();
    virtual GLS_EXPORT void RecordPreDrawEnd();
    virtual GLS_EXPORT void RecordCalculateStart();
    virtual GLS_EXPORT void RecordCalculateEnd();

    virtual GLS_EXPORT void PreDraw( const OpenGLMatrices& current, Culler& culler );

    virtual GLS_EXPORT void Draw();
    virtual GLS_EXPORT void DrawStats();

    virtual GLS_EXPORT void ToggleDisplay();

    virtual GLS_EXPORT void Samples( int frames );
    virtual GLS_EXPORT int Samples();

    virtual GLS_EXPORT void FrameInterval( unsigned long microseconds );
};

} // namespace disti

#endif