///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
// 
// All rights reserved.
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// distribution.
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///////////////////////////////////////////////////////////////////////////


#ifndef INCLUDED_IMAGE_VIEW_H
#define INCLUDED_IMAGE_VIEW_H

//----------------------------------------------------------------------------
//
//        class ImageView -- draws an Imf::Rgba image in an OpenGl window
//
//----------------------------------------------------------------------------
#include "namespaceAlias.h"
#include "GlWindow3d.h"

#include <FL/Fl_Chart.H>
#include <FL/Fl_Gl_Window.H>
#include <FL/Fl_Box.H>
#include <ImfRgba.h>
#include <ImfArray.h>



class ImageView: public Fl_Gl_Window
{
    public:

        ImageView (int x, int y,
                   int w, int h,            // display window width and height
                   const char label[],
                   const IMF::Rgba pixels[/* w*h */],
                   float* dataZ[/* w*h */],
                   unsigned int sampleCount[/* w*h */],
                   int zsize,
                   int dw, int dh,          // data window width and height
                   int dx, int dy,          // data window offset
                   Fl_Box *rgbaBox,
                   float farPlane,          // zfar plane in Deep 3D window
                   float gamma,
                   float exposure,
                   float defog,
                   float kneeLow,
                   float kneeHigh);

        virtual void        setExposure (float exposure);
        virtual void        setDefog (float defog);
        virtual void        setKneeLow (float low);
        virtual void        setKneeHigh (float high);
        virtual void        setPixels(const IMF::Rgba pixels[],
                                      float* dataZ[/* w*h */],
                                      unsigned int sampleCount[/* w*h */],
                                      int zsize,
                                      int dw, int dh, int dx, int dy);

        virtual void        draw();
        virtual int         handle (int event);
        void                clearDataDisplay();

    protected:

        virtual void        updateScreenPixels ();
        void                computeFogColor ();
        void                findZbound ();
        float               findKnee (float x, float y);
        void                drawChart (int x, int y, bool initChart);
        void                drawChartRef ();

        float                                _gamma;
        float                                _exposure;
        float                                _defog;
        float                                _kneeLow;
        float                                _kneeHigh;
        const IMF::Rgba *                    _rawPixels;
        float**                              _dataZ;
        unsigned int *                       _sampleCount;
        float                                _fogR;
        float                                _fogG;
        float                                _fogB;
        float                                _zmax;
        float                                _zmin;
        float                                _farPlane;
        int                                  _dw;
        int                                  _dh;
        int                                  _dx;
        int                                  _dy;
        int                                  _zsize;
        unsigned int                         _maxCount;

    private:

        GlWindow*                            _gl3d;
        Fl_Window *                          _chartwin;
        Fl_Chart *                           _chart;
        Fl_Chart *                           _chartMax;
        Fl_Chart *                           _chartMin;
        Fl_Box *                             _rgbaBox;
        char                                 _rgbaBoxLabel[200];
        IMF::Array<unsigned char>            _screenPixels;
};


#endif