gdcmLookupTable.h

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/*=========================================================================
 
  Program: GDCM (Grassroots DICOM). A DICOM library
 
  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
 
#ifndef GDCMLOOKUPTABLE_H
#define GDCMLOOKUPTABLE_H
 
#include "gdcmTypes.h"
#include "gdcmObject.h"
#include <stdlib.h>
 
namespace gdcm
{
 
class LookupTableInternal;
class GDCM_EXPORT LookupTable : public Object
{
public:
  typedef enum {
    RED = 0,  // Keep RED == 0
    GREEN,
    BLUE,
    GRAY,
    UNKNOWN
  } LookupTableType;
 
  LookupTable();
  ~LookupTable() override;
  void Print(std::ostream &) const override;
 
  void Allocate( unsigned short bitsample = 8 );
  //TODO: check to see if length should be unsigned short, unsigned int, or whatever
  void InitializeLUT(LookupTableType type, unsigned short length,
    unsigned short subscript, unsigned short bitsize);
  unsigned int GetLUTLength(LookupTableType type) const;
  virtual void SetLUT(LookupTableType type, const unsigned char *array,
    unsigned int length);
  void GetLUT(LookupTableType type, unsigned char *array, unsigned int &length) const;
  void GetLUTDescriptor(LookupTableType type, unsigned short &length,
    unsigned short &subscript, unsigned short &bitsize) const;
 
  void InitializeRedLUT(unsigned short length, unsigned short subscript,
    unsigned short bitsize);
  void SetRedLUT(const unsigned char *red, unsigned int length);
  void InitializeGreenLUT(unsigned short length, unsigned short subscript,
    unsigned short bitsize);
  void SetGreenLUT(const unsigned char *green, unsigned int length);
  void InitializeBlueLUT(unsigned short length, unsigned short subscript,
    unsigned short bitsize);
  void SetBlueLUT(const unsigned char *blue, unsigned int length);
 
  void Clear();
 
  void Decode(std::istream &is, std::ostream &os) const;
 
  bool Decode(char *outputbuffer, size_t outlen, const char *inputbuffer, size_t inlen) const;
 
  bool IsRGB8() const;
 
  bool Decode8(char *outputbuffer, size_t outlen, const char *inputbuffer, size_t inlen) const;
 
  LookupTable(LookupTable const &lut):Object(lut)
    {
    assert(0);
    }
 
  bool GetBufferAsRGBA(unsigned char *rgba) const;
 
  const unsigned char *GetPointer() const;
 
  bool WriteBufferAsRGBA(const unsigned char *rgba);
 
  unsigned short GetBitSample() const { return BitSample; }
 
  bool Initialized() const;
 
private:
  void Encode(std::istream &is, std::ostream &os);
 
protected:
  LookupTableInternal *Internal;
  unsigned short BitSample; // refer to the pixel type (not the bit size of LUT)
  bool IncompleteLUT:1;
};
 
} // end namespace gdcm
 
#endif //GDCMLOOKUPTABLE_H