diovpln.h

转化为DIB位图再显示出来的dicom文件C++代码

     */
    inline int isEmbedded() const
    {
        return EmbeddedData;
    }

    /** get label of overlay plane
     *
     ** @return label if successful, NULL otherwise
     */
    const char *getLabel() const
    {
        return (Label.empty()) ? OFstatic_cast(const char *, NULL) : Label.c_str();
    }

    /** get description of overlay plane
     *
     ** @return description if successful, NULL otherwise
     */
    const char *getDescription() const
    {
        return (Description.empty()) ? OFstatic_cast(const char *, NULL) : Description.c_str();
    }

    /** get group number of overlay plane
     *
     ** @return group number (0x6000-0x60ff)
     */
    Uint16 getGroupNumber() const
    {
        return GroupNumber;
    }

    /** get overlay plane data as an array of 1/8/16 bit values.
     *  Overlay plane is clipped to the area specified by the four min/max coordinates.
     *  Memory isn't handled internally and must therefore be deleted from calling program.
     *
     ** @param  frame  number of frame
     *  @param  xmin   x-coordinate of the top left hand corner
     *  @param  ymin   y-coordinate of the top left hand corner
     *  @param  xmax   x-coordinate of the bottom right hand corner
     *  @param  ymax   y-coordinate of the bottom right hand corner
     *  @param  bits   number of bits (stored) in the resulting array
     *  @param  fore   foreground color used for the plane (0x00-0xff)
     *  @param  back   transparent background color (0x00-0xff)
     *
     ** @return pointer to pixel data if successful, NULL otherwise
     */
    void *getData(const unsigned long frame,
                  const Uint16 xmin,
                  const Uint16 ymin,
                  const Uint16 xmax,
                  const Uint16 ymax,
                  const int bits,
                  const Uint16 fore,
                  const Uint16 back);

    /** create overlay plane data in (6xxx,3000) format.
     *  (1 bit allocated and stored, foreground color is 1, background color is 0,
     *   data is 16 bit padded - even length)
     *  Memory isn't handled internally and must therefore be deleted from calling program.
     *
     ** @param  buffer  stores pointer to overlay data (memory is allocated internally)
     *  @param  width   returns width of overlay plane (in pixels)
     *  @param  height  returns height of overlay plane (in pixels)
     *  @param  frames  returns number of frames (multiple overlay frames possible!)
     *
     ** @return number of bytes allocated for the 'buffer' if successful, 0 otherwise
     */
    unsigned long create6xxx3000Data(Uint8 *&buffer,
                                     unsigned int &width,
                                     unsigned int &height,
                                     unsigned long &frames);

    /** reset internal 'cursor' to the beginning of the specified frame
     *
     ** @param  frame  number of current frame
     *
     ** @return status, true if successful, false otherwise
     */
    inline int reset(const unsigned long frame);

    /** get value of the current overlay plane bit and move 'cursor' to the next position
     *
     ** @return true if plane bit is set, false otherwise
     */
    inline int getNextBit();

    /** set internal 'cursor' to a specific position
     *
     ** @param  x  new x-coordinate to start from
     *  @param  y  new y-coordinate to start from
     */
    inline void setStart(const Uint16 x,
                         const Uint16 y);


 protected:

    /// number of frames
    Uint32 NumberOfFrames;
    /// number of starting frame
    Uint16 ImageFrameOrigin;

    /// y-coordinate of overlay plane's origin
    Sint16 Top;
    /// x-coordinate of overlay plane's origin
    Sint16 Left;
    /// visible height
    Uint16 Height;
    /// visible width
    Uint16 Width;
    /// number of (stored) rows
    Uint16 Rows;
    /// number of (stored) columns
    Uint16 Columns;
    /// number of allocated bits per pixel
    Uint16 BitsAllocated;
    /// position of overlay plane bit
    Uint16 BitPosition;

    /// "color" of overlay plane (in percent: '0.0' = dark, '1.0' = bright)
    double Foreground;
    /// threshold value used for "threshold replace"
    double Threshold;
    /// P-value used for bitmap shutters
    Uint16 PValue;

    /// current overlay mode
    EM_Overlay Mode;
    /// default (stored) overlay mode
    EM_Overlay DefaultMode;

    /// label of overlay plane
    OFString Label;
    /// textual description of overlay plane
    OFString Description;

    /// group number of overlay plane
    Uint16 GroupNumber;

    /// validity status
    int Valid;
    /// visibility status
    int Visible;


 private:

    /// current bit position
    unsigned long BitPos;
    /// starting bit position of current frame
    unsigned long StartBitPos;

    /// x-coordinate of first pixel in surrounding memory buffer
    unsigned int StartLeft;
    /// y-coordinate of first pixel in surrounding memory buffer
    unsigned int StartTop;

    /// true, if overlay data in embedded in pixel data
    int EmbeddedData;

    /// pointer to current element of 'Data'
    const Uint16 *Ptr;
    /// pointer to starting element of current frame
    const Uint16 *StartPtr;
    /// pointer to overlay data (standalone) or pixel data (embedded)
    const Uint16 *Data;

 // --- declarations to avoid compiler warnings

    DiOverlayPlane(const DiOverlayPlane &);
    DiOverlayPlane &operator=(const DiOverlayPlane &);
};


/********************************************************************/


inline int DiOverlayPlane::reset(const unsigned long frame)
{
    int result = 0;
    if (Valid && (Data != NULL) && (frame >= ImageFrameOrigin) && (frame < ImageFrameOrigin + NumberOfFrames))
    {
        const unsigned long bits = (OFstatic_cast(unsigned long, StartLeft) + OFstatic_cast(unsigned long, StartTop) *
            OFstatic_cast(unsigned long, Columns) + frame * OFstatic_cast(unsigned long, Rows) *
            OFstatic_cast(unsigned long, Columns)) * OFstatic_cast(unsigned long, BitsAllocated);
        StartBitPos = BitPos = OFstatic_cast(unsigned long, BitPosition) + bits;
        StartPtr = Ptr = Data + (bits >> 4);
        result = (getRight() > 0) && (getBottom() > 0);
    }
    return result;
}


inline int DiOverlayPlane::getNextBit()
{
    int result;
    if (BitsAllocated == 16)                                       // optimization
        result = OFstatic_cast(int, *(Ptr++) & (1 << BitPosition));
    else
    {
       Ptr = StartPtr + (BitPos >> 4);                             // div 16
       result = OFstatic_cast(int, *Ptr & (1 << (BitPos & 0xf)));  // mod 16
       BitPos += BitsAllocated;                                    // next bit
    }
    return result;
}


inline void DiOverlayPlane::setStart(const Uint16 x,
                                     const Uint16 y)
{
    if (BitsAllocated == 16)
        Ptr = StartPtr + OFstatic_cast(unsigned long, y - Top) * OFstatic_cast(unsigned long, Columns) +
            OFstatic_cast(unsigned long, x - Left);
    else
        BitPos = StartBitPos + (OFstatic_cast(unsigned long, y - Top) * OFstatic_cast(unsigned long, Columns) +
            OFstatic_cast(unsigned long, x - Left)) * OFstatic_cast(unsigned long, BitsAllocated);
}


#endif


/*
 *
 * CVS/RCS Log:
 * $Log: diovpln.h,v $
 * Revision 1.26  2005/12/08 16:48:03  meichel
 * Changed include path schema for all DCMTK header files
 *
 * Revision 1.25  2004/01/05 14:52:20  joergr
 * Removed acknowledgements with e-mail addresses from CVS log.
 *
 * Revision 1.24  2003/12/09 10:11:28  joergr
 * Adapted type casts to new-style typecast operators defined in ofcast.h.
 * Removed leading underscore characters from preprocessor symbols (reserved
 * symbols). Updated copyright header.
 *
 * Revision 1.23  2003/06/12 15:08:34  joergr
 * Fixed inconsistent API documentation reported by Doxygen.
 *
 * Revision 1.22  2002/12/09 13:32:55  joergr
 * Renamed parameter/local variable to avoid name clashes with global
 * declaration left and/or right (used for as iostream manipulators).
 *
 * Revision 1.21  2002/11/27 14:08:07  meichel
 * Adapted module dcmimgle to use of new header file ofstdinc.h
 *
 * Revision 1.20  2002/04/16 13:53:12  joergr
 * Added configurable support for C++ ANSI standard includes (e.g. streams).
 *
 * Revision 1.19  2001/09/28 13:10:32  joergr
 * Added method to extract embedded overlay planes from pixel data and store
 * them in group (6xxx,3000) format.
 *
 * Revision 1.18  2001/06/01 15:49:49  meichel
 * Updated copyright header
 *
 * Revision 1.17  2001/05/22 13:20:44  joergr
 * Enhanced checking routines for corrupt overlay data (e.g. invalid value for
 * OverlayBitsAllocated).
 *
 * Revision 1.16  2000/03/08 16:24:22  meichel
 * Updated copyright header.
 *
 * Revision 1.15  2000/02/02 11:02:39  joergr
 * Removed space characters before preprocessor directives.
 *
 * Revision 1.14  1999/10/20 10:34:06  joergr
 * Enhanced method getOverlayData to support 12 bit data for print.
 *
 * Revision 1.13  1999/09/17 12:46:59  joergr
 * Added/changed/completed DOC++ style comments in the header files.
 *
 * Revision 1.12  1999/08/25 16:41:55  joergr
 * Added new feature: Allow clipping region to be outside the image
 * (overlapping).
 *
 * Revision 1.11  1999/05/03 11:09:31  joergr
 * Minor code purifications to keep Sun CC 2.0.1 quiet.
 *
 * Revision 1.10  1999/04/29 16:46:47  meichel
 * Minor code purifications to keep DEC cxx 6 quiet.
 *
 * Revision 1.9  1999/03/24 17:20:21  joergr
 * Added/Modified comments and formatting.
 *
 * Revision 1.8  1999/03/22 08:52:18  joergr
 * Added parameter to specify (transparent) background color for method
 * getOverlayData().
 *
 * Revision 1.7  1999/02/03 17:34:36  joergr
 * Added BEGIN_EXTERN_C and END_EXTERN_C to some C includes.
 * Added support for calibration according to Barten transformation (incl.
 * a DISPLAY file describing the monitor characteristic).
 *
 * Revision 1.6  1998/12/23 13:21:29  joergr
 * Changed parameter type (long to int) to avoid warning reported by MSVC5.
 *
 * Revision 1.5  1998/12/23 11:37:42  joergr
 * Changed order of parameters for addOverlay() and getOverlayData().
 * Changed behaviour of getLabel/Description/Explanation() methods: return
 * NULL if string empty, no empty string "".
 *
 * Revision 1.4  1998/12/22 14:36:30  joergr
 * Added method to check whether plane is visible, to get plane mode and to
 * remove all planes. Set 'value' used for getOverlay/PlaneData().
 *
 * Revision 1.3  1998/12/16 16:37:51  joergr
 * Added method to export overlay planes (create 8-bit bitmap).
 * Implemented flipping and rotation of overlay planes.
 *
 * Revision 1.2  1998/12/14 17:28:18  joergr
 * Added methods to add and remove additional overlay planes (still untested).
 * Added methods to support overlay labels and descriptions.
 *
 * Revision 1.1  1998/11/27 15:45:09  joergr
 * Added copyright message.
 * Added method to detach pixel data if it is no longer needed.
 * Added methods and constructors for flipping and rotating, changed for
 * scaling and clipping.
 *
 * Revision 1.7  1998/07/01 08:39:26  joergr
 * Minor changes to avoid compiler warnings (gcc 2.8.1 with additional
 * options), e.g. add copy constructors.
 *
 * Revision 1.6  1998/05/11 14:53:26  joergr
 * Added CVS/RCS header to each file.
 *
 *
 */