// gdcmFile.h

#ifndef GDCMFILE_H
#define GDCMFILE_H

#include "gdcmCommon.h"
#include "gdcmHeader.h"

////////////////////////////////////////////////////////////////////////////
// In addition to Dicom header exploration, this class is designed
// for accessing the image/volume content. One can also use it to
// write Dicom files.

class GDCM_EXPORT gdcmFile: public gdcmHeader
{
private:
	void* PixelData;
	size_t lgrTotale;
	int Parsed;          // weather allready parsed
	string OrigFileName; // To avoid file overwrite
   void SwapZone(void* im, int swap, int lgr, int nb);
   bool ReadPixelData(void * destination);
protected:
   int WriteBase(string FileName, FileType type);
public:
	gdcmFile(string & filename);
	gdcmFile(const char * filename);
	
	// For promotion (performs a deepcopy of pointed header object)
	// TODO Swig gdcmFile(gdcmHeader* header);
	// TODO Swig ~gdcmFile();

	// On writing purposes. When instance was created through
	// gdcmFile(string filename) then the filename argument MUST be different
	// from the constructor's one (no overwriting allowed).
	// TODO Swig int SetFileName(string filename);

   void SetPixelDataSizeFromHeader(void);
	// Returns size (in bytes) of required memory to contain data
	// represented in this file.
	size_t GetImageDataSize();
	
	// Allocates necessary memory, copies the data (image[s]/volume[s]) to
	// newly allocated zone and return a pointer to it:
	 void * GetImageData();
	
	// Copies (at most MaxSize bytes) of data to caller's memory space.
	// Returns an error code on failure (if MaxSize is not big enough)
	size_t GetImageDataIntoVector(void* destination, size_t MaxSize );
	
	// Allocates ExpectedSize bytes of memory at this->Data and copies the
	// pointed data to it. Copying the image might look useless but
   // the caller might destroy it's image (without knowing it: think
   // of a complicated interface where display is done with a library
   // e.g. VTK) before calling the Write
	int SetImageData     (void * Data, size_t ExpectedSize);
   // When the caller is aware we simply point to the data:
	// TODO int SetImageDataNoCopy (void * Data, size_t ExpectedSize);
	void SetImageDataSize (size_t ExpectedSize);
	
	// Push to disk.
	// A NE PAS OUBLIER : que fait-on en cas de Transfert Syntax (dans l'entete)
	// incohérente avec l'ordre des octets en mémoire  
	// TODO Swig int Write();
	
	// Ecrit sur disque les pixels d'UNE image
	// Aucun test n'est fait sur l'"Endiannerie" du processeur.
	// Ca sera à l'utilisateur d'appeler son Reader correctement
		
	int WriteRawData 	(string nomFichier);
	int WriteDcmImplVR(string nomFichier);
	int WriteDcmImplVR(const char * nomFichier);
	int WriteDcmExplVR(string nomFichier);
	int WriteAcr     	(string nomFichier);
};

#endif