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//                           License Agreement
//                For Open Source Computer Vision Library
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#ifndef _GRFMT_EXR_H_
#define _GRFMT_EXR_H_

#ifdef HAVE_OPENEXR

#if defined __GNUC__ && defined __APPLE__
#  pragma GCC diagnostic ignored "-Wshadow"
#endif

#include <ImfChromaticities.h>
#include <ImfInputFile.h>
#include <ImfChannelList.h>
#include <ImathBox.h>
#include "grfmt_base.hpp"

namespace cv
{

using namespace Imf;
using namespace Imath;

/* libpng version only */

class ExrDecoder CV_FINAL : public BaseImageDecoder
{
public:

    ExrDecoder();
    ~ExrDecoder() CV_OVERRIDE;

    int   type() const CV_OVERRIDE;
    bool  readData( Mat& img ) CV_OVERRIDE;
    bool  readHeader() CV_OVERRIDE;
    void  close();

    ImageDecoder newDecoder() const CV_OVERRIDE;

protected:
    void  UpSample( uchar *data, int xstep, int ystep, int xsample, int ysample );
    void  UpSampleX( float *data, int xstep, int xsample );
    void  UpSampleY( uchar *data, int xstep, int ystep, int ysample );
    void  ChromaToBGR( float *data, int numlines, int step );
    void  RGBToGray( float *in, float *out );

    InputFile      *m_file;
    Imf::PixelType  m_type;
    Box2i           m_datawindow;
    bool            m_ischroma;
    const Channel  *m_red;
    const Channel  *m_green;
    const Channel  *m_blue;
    Chromaticities  m_chroma;
    int             m_bit_depth;
    bool            m_native_depth;
    bool            m_iscolor;
    bool            m_isfloat;

private:
    ExrDecoder(const ExrDecoder &); // copy disabled
    ExrDecoder& operator=(const ExrDecoder &); // assign disabled
};


class ExrEncoder CV_FINAL : public BaseImageEncoder
{
public:
    ExrEncoder();
    ~ExrEncoder() CV_OVERRIDE;

    bool  isFormatSupported( int depth ) const CV_OVERRIDE;
    bool  write( const Mat& img, const std::vector<int>& params ) CV_OVERRIDE;
    ImageEncoder newEncoder() const CV_OVERRIDE;
};

}

#endif

#endif/*_GRFMT_EXR_H_*/
