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gdcmLookupTable.h
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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004
    00005   Copyright (c) 2006-2011 Mathieu Malaterre
    00006   All rights reserved.
    00007   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00008
    00009      This software is distributed WITHOUT ANY WARRANTY; without even
    00010      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00011      PURPOSE.  See the above copyright notice for more information.
    00012
    00013 =========================================================================*/
    00014
    00015 #ifndef GDCMLOOKUPTABLE_H
    00016 #define GDCMLOOKUPTABLE_H
    00017
    00018 #include "gdcmTypes.h"
    00019 #include "gdcmObject.h"
    00020 #include <stdlib.h>
    00021
    00022 namespace gdcm
    00023 {
    00024
    00025 class LookupTableInternal;
    00029 class GDCM_EXPORT LookupTable : public Object
    00030 {
    00031 public:
    00032   typedef enum {
    00033     RED = 0,  // Keep RED == 0
    00034     GREEN,
    00035     BLUE,
    00036     GRAY,
    00037     UNKNOWN
    00038   } LookupTableType;
    00039
    00040   LookupTable();
    00041   ~LookupTable();
    00042   void Print(std::ostream &) const {}
    00043
    00045   void Allocate( unsigned short bitsample = 8 );
    00047   //TODO: check to see if length should be unsigned short, unsigned int, or whatever
    00048   void InitializeLUT(LookupTableType type, unsigned short length,
    00049     unsigned short subscript, unsigned short bitsize);
    00050   unsigned int GetLUTLength(LookupTableType type) const;
    00051   virtual void SetLUT(LookupTableType type, const unsigned char *array,
    00052     unsigned int length);
    00053   void GetLUT(LookupTableType type, unsigned char *array, unsigned int &length) const;
    00054   void GetLUTDescriptor(LookupTableType type, unsigned short &length,
    00055     unsigned short &subscript, unsigned short &bitsize) const;
    00056
    00058   void InitializeRedLUT(unsigned short length, unsigned short subscript,
    00059     unsigned short bitsize);
    00060   void SetRedLUT(const unsigned char *red, unsigned int length);
    00061   void InitializeGreenLUT(unsigned short length, unsigned short subscript,
    00062     unsigned short bitsize);
    00063   void SetGreenLUT(const unsigned char *green, unsigned int length);
    00064   void InitializeBlueLUT(unsigned short length, unsigned short subscript,
    00065     unsigned short bitsize);
    00066   void SetBlueLUT(const unsigned char *blue, unsigned int length);
    00067
    00069   void Clear();
    00070
    00072   void Decode(std::istream &is, std::ostream &os) const;
    00073
    00074   LookupTable(LookupTable const &lut):Object(lut)
    00075     {
    00076     assert(0);
    00077     }
    00078
    00080   bool GetBufferAsRGBA(unsigned char *rgba) const;
    00081
    00083   const unsigned char *GetPointer() const;
    00084
    00086   bool WriteBufferAsRGBA(const unsigned char *rgba);
    00087
    00089   unsigned short GetBitSample() const { return BitSample; }
    00090
    00092   bool Initialized() const;
    00093
    00094 private:
    00096   void Encode(std::istream &is, std::ostream &os);
    00097
    00098 protected:
    00099   LookupTableInternal *Internal;
    00100   unsigned short BitSample; // refer to the pixel type (not the bit size of LUT)
    00101   bool IncompleteLUT:1;
    00102 };
    00103
    00104 } // end namespace gdcm
    00105
    00106 #endif //GDCMLOOKUPTABLE_H