# gdcmLookupTable.h

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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004   Module:  $URL$
    00005
    00006   Copyright (c) 2006-2010 Mathieu Malaterre
    00007   All rights reserved.
    00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00009
    00010      This software is distributed WITHOUT ANY WARRANTY; without even
    00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00012      PURPOSE.  See the above copyright notice for more information.
    00013
    00014 =========================================================================*/
    00015
    00016 #ifndef GDCMLOOKUPTABLE_H
    00017 #define GDCMLOOKUPTABLE_H
    00018
    00019 #include "gdcmTypes.h"
    00020 #include "gdcmObject.h"
    00021 #include <stdlib.h>
    00022
    00023 namespace gdcm
    00024 {
    00025
    00026 class LookupTableInternal;
    00030 class GDCM_EXPORT LookupTable : public Object
    00031 {
    00032 public:
    00033   typedef enum {
    00034     RED = 0,  // Keep RED == 0
    00035     GREEN,
    00036     BLUE,
    00037     GRAY,
    00038     UNKNOWN
    00039   } LookupTableType;
    00040
    00041   LookupTable();
    00042   ~LookupTable();
    00043   void Print(std::ostream &) const {}
    00044
    00046   void Allocate( unsigned short bitsample = 8 );
    00048   //TODO: check to see if length should be unsigned short, unsigned int, or whatever
    00049   void InitializeLUT(LookupTableType type, unsigned short length,
    00050     unsigned short subscript, unsigned short bitsize);
    00051   unsigned int GetLUTLength(LookupTableType type) const;
    00052   virtual void SetLUT(LookupTableType type, const unsigned char *array,
    00053     unsigned int length);
    00054   void GetLUT(LookupTableType type, unsigned char *array, unsigned int &length) const;
    00055   void GetLUTDescriptor(LookupTableType type, unsigned short &length,
    00056     unsigned short &subscript, unsigned short &bitsize) const;
    00057
    00059   void InitializeRedLUT(unsigned short length, unsigned short subscript,
    00060     unsigned short bitsize);
    00061   void SetRedLUT(const unsigned char *red, unsigned int length);
    00062   void InitializeGreenLUT(unsigned short length, unsigned short subscript,
    00063     unsigned short bitsize);
    00064   void SetGreenLUT(const unsigned char *green, unsigned int length);
    00065   void InitializeBlueLUT(unsigned short length, unsigned short subscript,
    00066     unsigned short bitsize);
    00067   void SetBlueLUT(const unsigned char *blue, unsigned int length);
    00068
    00070   void Clear();
    00071
    00073   void Decode(std::istream &is, std::ostream &os) const;
    00074
    00075   LookupTable(LookupTable const &lut):Object(lut)
    00076     {
    00077     assert(0);
    00078     }
    00079
    00081   bool GetBufferAsRGBA(unsigned char *rgba) const;
    00082
    00084   const unsigned char *GetPointer() const;
    00085
    00087   bool WriteBufferAsRGBA(const unsigned char *rgba);
    00088
    00090   unsigned short GetBitSample() const { return BitSample; }
    00091
    00093   bool Initialized() const;
    00094
    00095 private:
    00096 protected:
    00097   LookupTableInternal *Internal;
    00098   unsigned short BitSample; // refer to the pixel type (not the bit size of LUT)
    00099   bool IncompleteLUT:1;
    00100 };
    00101
    00102 } // end namespace gdcm
    00103
    00104 #endif //GDCMLOOKUPTABLE_H