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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;
/**
* \brief LookupTable class
*/
class GDCM_EXPORT LookupTable : public Object
{
public:
typedef enum {
RED = 0, // Keep RED == 0
GREEN,
BLUE,
GRAY,
UNKNOWN
} LookupTableType;
LookupTable();
~LookupTable();
void Print(std::ostream &) const {}
/// Allocate the LUT
void Allocate( unsigned short bitsample = 8 );
/// Generic interface:
//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;
/// RED / GREEN / BLUE specific:
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);
/// Clear the LUT
void Clear();
/// Decode the LUT
void Decode(std::istream &is, std::ostream &os) const;
/// Decode the LUT
/// outputbuffer will contains the RGB decoded PALETTE COLOR input image of size inlen
/// the outputbuffer should be at least 3 times the size of inlen
bool Decode(char *outputbuffer, size_t outlen, const char *inputbuffer, size_t inlen) const;
LookupTable(LookupTable const &lut):Object(lut)
{
assert(0);
}
/// return the LUT as RGBA buffer
bool GetBufferAsRGBA(unsigned char *rgba) const;
/// return a raw pointer to the LUT
const unsigned char *GetPointer() const;
/// Write the LUT as RGBA
bool WriteBufferAsRGBA(const unsigned char *rgba);
/// return the bit sample
unsigned short GetBitSample() const { return BitSample; }
/// return whether the LUT has been initialized
bool Initialized() const;
private:
/// Unfinished work
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
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