opencv/modules/imgcodecs/src/grfmt_tiff.hpp

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#ifndef _GRFMT_TIFF_H_
#define _GRFMT_TIFF_H_

#include "grfmt_base.hpp"

namespace cv
{

// native simple TIFF codec
enum TiffCompression
{
    TIFF_UNCOMP = 1,
    TIFF_HUFFMAN = 2,
    TIFF_PACKBITS = 32773
};

enum TiffByteOrder
{
    TIFF_ORDER_II = 0x4949,
    TIFF_ORDER_MM = 0x4d4d
};


enum  TiffTag
{
    TIFF_TAG_WIDTH  = 256,
    TIFF_TAG_HEIGHT = 257,
    TIFF_TAG_BITS_PER_SAMPLE = 258,
    TIFF_TAG_COMPRESSION = 259,
    TIFF_TAG_PHOTOMETRIC = 262,
    TIFF_TAG_STRIP_OFFSETS = 273,
    TIFF_TAG_STRIP_COUNTS = 279,
    TIFF_TAG_SAMPLES_PER_PIXEL = 277,
    TIFF_TAG_ROWS_PER_STRIP = 278,
    TIFF_TAG_PLANAR_CONFIG = 284,
    TIFF_TAG_COLOR_MAP = 320
};


enum TiffFieldType
{
    TIFF_TYPE_BYTE = 1,
    TIFF_TYPE_SHORT = 3,
    TIFF_TYPE_LONG = 4
};


#ifdef HAVE_TIFF

// libtiff based TIFF codec

class TiffDecoderBufHelper;

class TiffDecoder : public BaseImageDecoder
{
public:
    TiffDecoder();
    virtual ~TiffDecoder();

    bool  readHeader();
    bool  readData( Mat& img );
    void  close();
    bool  nextPage();

    size_t signatureLength() const;
    bool checkSignature( const String& signature ) const;
    ImageDecoder newDecoder() const;

protected:

    friend class TiffDecoderBufHelper;

    void* m_tif;
    int normalizeChannelsNumber(int channels) const;
    bool readHdrData(Mat& img);
    bool m_hdr;
    size_t m_buf_pos;

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

#endif

// ... and writer
class TiffEncoder : public BaseImageEncoder
{
public:
    TiffEncoder();
    virtual ~TiffEncoder();

    bool isFormatSupported( int depth ) const;

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

protected:
    void  writeTag( WLByteStream& strm, TiffTag tag,
                    TiffFieldType fieldType,
                    int count, int value );

    bool writeLibTiff( const Mat& img, const std::vector<int>& params );
    bool writeHdr( const Mat& img );
};

}

#endif/*_GRFMT_TIFF_H_*/