GDCM  2.2.0
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

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