X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmFile.cxx;h=2721d9ad1e8d57bc771472ffed29920ed7006875;hb=34e2c3682fc70e470838303625aeba448def1c15;hp=d5a85294a273a84c6cbeeb003b3f20e322339962;hpb=e06d61ba347d7f5f692a682434e089d939f85653;p=gdcm.git

diff --git a/src/gdcmFile.cxx b/src/gdcmFile.cxx
index d5a85294..2721d9ad 100644
--- a/src/gdcmFile.cxx
+++ b/src/gdcmFile.cxx
@@ -1,9 +1,859 @@
 // gdcmFile.cxx
 
-#include "gdcm.h"
+#include "gdcmFile.h"
+#include "gdcmUtil.h"
+#include "iddcmjpeg.h" // for the 'LibIDO' Jpeg LossLess
+using namespace std;
 
-gdcmFile::gdcmFile(string & filename)
-	:gdcmHeader(filename.c_str())
+#define str2num(str, typeNum) *((typeNum *)(str))
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief Constructor dedicated to writing a new DICOMV3 part10 compliant
+ *        file (see SetFileName, SetDcmTag and Write)
+ *        Opens (in read only and when possible) an existing file and checks
+ *        for DICOM compliance. Returns NULL on failure.
+ * \Note  the in-memory representation of all available tags found in
+ *        the DICOM header is post-poned to first header information access.
+ *        This avoid a double parsing of public part of the header when
+ *        one sets an a posteriori shadow dictionary (efficiency can be
+ *        seen as a side effect).   
+ *
+ * @param filename file to be opened for parsing
+ *
+ * @return	
+ */
+ 
+gdcmFile::gdcmFile(string & filename) 
+	:gdcmHeader(filename.c_str())	
+{
+   SetPixelDataSizeFromHeader();
+}
+
+gdcmFile::gdcmFile(const char * filename) 
+	:gdcmHeader(filename)	
 {
+   SetPixelDataSizeFromHeader();
+}
+
+/**
+ * \ingroup   gdcmFile
+ * \brief     calcule la longueur (in bytes) A ALLOUER pour recevoir les
+ *        	pixels de l'image
+ *  		ou DES images dans le cas d'un multiframe
+ *  		ATTENTION : il ne s'agit PAS de la longueur du groupe des Pixels	
+ *  		(dans le cas d'images compressees, elle n'a pas de sens).
+ *
+ * @return	longueur a allouer 
+ */
+void gdcmFile::SetPixelDataSizeFromHeader(void) {
+   int nb;
+   string str_nb;
+
+   str_nb=gdcmHeader::GetPubElValByNumber(0x0028,0x0100);
+   if (str_nb == "gdcm::Unfound" ) {
+      nb = 16;
+   } else {
+      nb = atoi(str_nb.c_str() );
+      if (nb == 12) nb =16;
+   }
+   lgrTotale =  GetXSize() *  GetYSize() *  GetZSize() * (nb/8)* GetSamplesPerPixel();
+   
+   string str_PhotometricInterpretation = gdcmHeader::GetPubElValByNumber(0x0028,0x0004);
+   if (   str_PhotometricInterpretation == "PALETTE COLOR " 
+       || str_PhotometricInterpretation == "YBR_FULL") {   // --> some more to be added !!
+      lgrTotale*=3;
+   }
+   
+   // remaining to check :
+   //   str_PhotometricInterpretation == "YBR_FULL"
+   //   str_PhotometricInterpretation == "YBR_FULL_422" (no LUT, no Palette)
+   // -->and some more !!
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief     Returns the size (in bytes) of required memory to hold
+ *            the pixel data represented in this file.
+ * @return    The size of pixel data in bytes.
+ */
+size_t gdcmFile::GetImageDataSize(void) {
+   return (lgrTotale);
+}
+
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup gdcmFile
+ * \brief   Parse pixel data from disk and *prints* the result
+ * \        For multi-fragment Jpeg files checking purpose *only*
+ * \        Allows to 'see' if the file *does* conform
+ * \       (some of them do not)
+ * \        with Dicom Part 3, Annex A (PS 3.5-2003, page 58)
+ *
+ */
+bool gdcmFile::ParsePixelData(void) {
+   if ( !OpenFile())
+      return false;
+      
+    if ( fseek(fp, GetPixelOffset(), SEEK_SET) == -1 ) {
+      CloseFile();
+      return false;
+   } 
+   
+   if ( !IsDicomV3()                             ||
+        IsImplicitVRLittleEndianTransferSyntax() ||
+        IsExplicitVRLittleEndianTransferSyntax() ||
+        IsExplicitVRBigEndianTransferSyntax()    ||
+        IsDeflatedExplicitVRLittleEndianTransferSyntax() ) { 
+        
+        printf ("gdcmFile::ParsePixelData : non JPEG File\n");
+        return 0;       
+   }        
+
+   int nb;
+   string str_nb=gdcmHeader::GetPubElValByNumber(0x0028,0x0100);
+   if (str_nb == "gdcm::Unfound" ) {
+      nb = 16;
+   } else {
+      nb = atoi(str_nb.c_str() );
+      if (nb == 12) nb =16;
+   }
+   int nBytes= nb/8;
+      
+    //int taille = GetXSize() *  GetYSize() * GetZSize() * GetSamplesPerPixel();
+   int taille = GetXSize() *  GetYSize()  * GetSamplesPerPixel(); 
+         
+   printf ("Checking the Dicom-Jpeg/RLE Pixels\n");
+      
+  // ------------------------------- for Parsing : Position on begining of Jpeg Pixels  
+      guint16 ItemTagGr,ItemTagEl; 
+      int ln;
+      long ftellRes;
+      char * destination = NULL;
+      ftellRes=ftell(fp);
+      fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Basic Offset Table Item Tag Gr
+      fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Basic Offset Table Item Tag El
+      if(GetSwapCode()) {
+         ItemTagGr=SwapShort(ItemTagGr); 
+         ItemTagEl=SwapShort(ItemTagEl);            
+      }
+      printf ("at %x : ItemTag (should be fffe,e000): %04x,%04x\n",
+                ftellRes,ItemTagGr,ItemTagEl );
+      ftellRes=ftell(fp);
+      fread(&ln,4,1,fp); 
+      if(GetSwapCode()) 
+         ln=SwapLong(ln);    // Basic Offset Table Item Lentgh
+      printf("at %x : Basic Offset Table Item Lentgh (??) %d x(%08x)\n",
+            ftellRes,ln,ln);
+      if (ln != 0) {
+         // What is it used for ??
+         char * BasicOffsetTableItemValue= (char *)malloc(ln+1);
+         fread(BasicOffsetTableItemValue,ln,1,fp); 
+         guint32 a;
+         for (int i=0;i<ln;i+=4){
+            a=str2num(&BasicOffsetTableItemValue[i],guint32);
+            printf("      x(%08x)  %d\n",a,a);
+         }              
+      }
+      
+      ftellRes=ftell(fp);
+      fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Item Tag Gr
+      fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Item Tag El
+      if(GetSwapCode()) {
+         ItemTagGr=SwapShort(ItemTagGr); 
+         ItemTagEl=SwapShort(ItemTagEl);            
+      }  
+      printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
+            ftellRes,ItemTagGr,ItemTagEl );
+      
+      while (  ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) { // Parse fragments
+      
+         ftellRes=ftell(fp);
+         fread(&ln,4,1,fp); 
+         if(GetSwapCode()) 
+            ln=SwapLong(ln);    // length
+         printf("      at %x : fragment length %d x(%08x)\n",
+                ftellRes, ln,ln);
+
+         destination += taille * nBytes; // location in user's memory 
+                
+         printf ("      Destination will be x(%x) = %d \n",
+               destination,destination );
+                        
+         fseek(fp,ln,SEEK_CUR); // skipping (not reading) fragment pixels    
+      
+         ftellRes=ftell(fp);
+         fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Item Tag Gr
+         fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Item Tag El
+         if(GetSwapCode()) {
+            ItemTagGr=SwapShort(ItemTagGr); 
+            ItemTagEl=SwapShort(ItemTagEl);            
+         }
+         printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
+               ftellRes,ItemTagGr,ItemTagEl );
+               
+      
+      } 
+   return 1;            
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup gdcmFile
+ * \brief   Read pixel data from disk (optionaly decompressing) into the
+ *          caller specified memory location.
+ * @param   destination where the pixel data should be stored.
+ *
+ */
+bool gdcmFile::ReadPixelData(void* destination) {
+
+   if ( !OpenFile())
+      return false;
+      
+    if ( fseek(fp, GetPixelOffset(), SEEK_SET) == -1 ) {
+      CloseFile();
+      return false;
+   }     
+
+// ------------------------------- Uncompressed File
+    
+   if ( !IsDicomV3()                             ||
+        IsImplicitVRLittleEndianTransferSyntax() ||
+        IsExplicitVRLittleEndianTransferSyntax() ||
+        IsExplicitVRBigEndianTransferSyntax()    ||
+        IsDeflatedExplicitVRLittleEndianTransferSyntax() ) { 
+                    
+      size_t ItemRead = fread(destination, lgrTotale, 1, fp);
+      if ( ItemRead != 1 ) {
+         CloseFile();
+         return false;
+      } else {
+         CloseFile();
+         return true;
+      }
+   } 
+    
+ // ----------------------------- JPEG Compressed File .
+       
+      int nb;
+      string str_nb=gdcmHeader::GetPubElValByNumber(0x0028,0x0100);
+      if (str_nb == "gdcm::Unfound" ) {
+         nb = 16;
+      } else {
+         nb = atoi(str_nb.c_str() );
+         if (nb == 12) nb =16;
+      }
+      int nBytes= nb/8;
+      
+       //int taille = GetXSize() *  GetYSize() * GetZSize() * GetSamplesPerPixel();
+      int taille = GetXSize() *  GetYSize()  * GetSamplesPerPixel(); 
+          
+                
+  // ------------------------------- JPEG LossLess : call to Jpeg Libido
+   
+   if (IsJPEGLossless() && GetZSize() == 1) {
+   
+      int ln; //  Position on begining of Jpeg Pixels
+      fseek(fp,4,SEEK_CUR);  // skipping (fffe,e000) : Basic Offset Table Item
+      fread(&ln,4,1,fp); 
+      if(GetSwapCode()) 
+         ln=SwapLong(ln);    // Item length
+      fseek(fp,ln,SEEK_CUR); // skipping Basic Offset Table ('ln' bytes) 
+      fseek(fp,4,SEEK_CUR);  // skipping (fffe,e000) : First fragment Item Tag
+      fread(&ln,4,1,fp);     // First fragment length (just to know)
+      if(GetSwapCode()) 
+         ln=SwapLong(ln);      
+ 
+      ClbJpeg* jpg = _IdDcmJpegRead(fp); // TODO : find a 'full' one.
+                                         // (We use the LibIDO one :-(
+      if(jpg == NULL) {
+         CloseFile();
+         return false;
+      }      
+      int * dataJpg = jpg->DataImg;
+      
+      switch (nBytes) {   
+         case 1:
+         {
+            unsigned short *dest = (unsigned short *)destination;
+            for (int i=0; i<taille; i++) {
+               *((unsigned char *)dest+i) = *(dataJpg +i);   
+            }
+         }
+         break;        
+         
+         case 2:
+         {
+            unsigned short *dest = (unsigned short *)destination;
+            for (int i=0; i<taille; i++) {           
+               *((unsigned short *)dest+i) = *(dataJpg +i);    
+            }
+         }
+         break;       
+     }
+      _IdDcmJpegFree (jpg);
+      return true;
+   }  
+ 
+  // ------------------------------- JPEG Lossy : call to IJG 6b
+    
+      long fragmentBegining; // for ftell, fseek
+      
+      bool a=0, b=0;
+      
+      a = gdcmHeader::IsRLELossLessTransferSyntax();
+      if (!a)
+         bool b = gdcmHeader::IsJPEG2000();
+       
+      bool res;
+      guint16 ItemTagGr,ItemTagEl;
+      int ln;  //  Position on begining of Jpeg Pixels
+      
+      fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Item Tag Gr
+      fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Item Tag El
+      if(GetSwapCode()) {
+         ItemTagGr=SwapShort(ItemTagGr); 
+         ItemTagEl=SwapShort(ItemTagEl);            
+      }
+      fread(&ln,4,1,fp); 
+      if(GetSwapCode()) 
+         ln=SwapLong(ln);    // Basic Offset Table Item length
+         
+      if (ln != 0) {
+         // What is it used for ?!?
+         char *BasicOffsetTableItemValue = (char *)malloc(ln+1);        
+         fread(BasicOffsetTableItemValue,ln,1,fp); 
+      }
+      
+      // first Fragment initialisation
+      fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Item Tag Gr
+      fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Item Tag El
+      if(GetSwapCode()) {
+         ItemTagGr=SwapShort(ItemTagGr); 
+         ItemTagEl=SwapShort(ItemTagEl);            
+      }
+              
+      // parsing fragments until Sequence Delim. Tag found
+       //unsigned short *dest = (unsigned short *)destination;
+         
+      while (  ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) {
+         fread(&ln,4,1,fp); 
+         if(GetSwapCode()) 
+            ln=SwapLong(ln);    // Fragment Item length
+      
+         // FIXME : multi fragments 
+         fragmentBegining=ftell(fp);
+                       
+         if (a)  
+            res = (bool)gdcm_read_RLE_file (destination);       // Reading Fragment pixels 
+         else if (b)
+            res = (bool)gdcm_read_JPEG2000_file (destination);  // Reading Fragment pixels 
+            
+         else if (IsJPEGLossless()) {  // ------------- call to LibIDO Jpeg for each Frame/fragment
+                  
+                                       // Warning : Works only if there is one fragment per frame
+                                       //           (Or a single fragment for the multiframe file)
+            ClbJpeg* jpg = _IdDcmJpegRead(fp); // TODO : find a 'full' one.
+                                               // (We use the LibIDO one :-(
+            if(jpg == NULL) {
+               CloseFile();
+               return false;
+            }      
+            int * dataJpg = jpg->DataImg;
+            unsigned short *dest = (unsigned short *)destination;
+            switch (nBytes) {   
+               case 1:
+               {
+                  for (int i=0; i<taille; i++) {
+                     *((unsigned char *)dest+i) = *(dataJpg +i);   
+                  }
+               break;
+               }        
+         
+               case 2:
+               {
+                  for (int i=0; i<taille; i++) {        
+                     *((unsigned short *)dest+i) = *(dataJpg +i);    
+                  }
+               break;
+               }       
+           } 
+           _IdDcmJpegFree (jpg);
+     
+         } // ------------------------------------- endif (IsJPEGLossless())
+                  
+         else
+            if  (GetBitsStored() == 8) {
+            	res = (bool)gdcm_read_JPEG_file (destination);  // Reading Fragment pixels         
+            } else {
+            	res = (bool)gdcm_read_JPEG_file12 (destination);// Reading Fragment pixels  
+            }       
+            
+         if (!res) break;
+         
+         // FIXME : will work only when each fragment corresponds to a Frame :-(
+         
+         (char *) destination += taille * nBytes; // location in user's memory 
+                                                  // for next fragment (if any) 
+         // TODO : find a suitable file (multifragment/single Frame Jpeg file) to check
+         
+         fseek(fp,fragmentBegining,SEEK_SET); // To be sure we start 
+         fseek(fp,ln,SEEK_CUR);               // at the begining of next fragment
+         
+         ItemTagGr = ItemTagEl =0;
+         fread(&ItemTagGr,2,1,fp);  // Reading (fffe) : Item Tag Gr
+         fread(&ItemTagEl,2,1,fp);  // Reading (e000) : Item Tag El
+         if(GetSwapCode()) {
+            ItemTagGr=SwapShort(ItemTagGr); 
+            ItemTagEl=SwapShort(ItemTagEl);            
+         } 
+         
+      //(char *) destination += taille * nBytes;
+      //cout << "destination" << destination << "\n";
+      }
+                
+      return res;
+}   
+
+/**
+ * \ingroup gdcmFile
+ * \brief   Allocates necessary memory, copies the pixel data
+ *          (image[s]/volume[s]) to newly allocated zone.
+ * @return  Pointer to newly allocated pixel data.
+ * \        NULL if alloc fails 
+ */
+void * gdcmFile::GetImageData (void) {
+   PixelData = (void *) malloc(lgrTotale);
+   if (PixelData)
+      GetImageDataIntoVector(PixelData, lgrTotale);
+   return(PixelData);
+}
+
+/**
+ * \ingroup gdcmFile
+ * \brief   Copies at most MaxSize bytes of pixel data to caller's
+ *          memory space.
+ * @param   destination Address (in caller's memory space) at which the
+ *          pixel data should be copied
+ * @param   MaxSize Maximum number of bytes to be copied. When MaxSize
+ *          is not sufficient to hold the pixel data the copy is not
+ *          executed (i.e. no partial copy).
+ * @return  On success, the number of bytes actually copied. Zero on
+ *          failure e.g. MaxSize is lower than necessary.
+ */
+
+size_t gdcmFile::GetImageDataIntoVector (void* destination, size_t MaxSize) {
+
+   int nb, nbu, highBit, signe;
+   string str_nbFrames, str_nb, str_nbu, str_highBit, str_signe;
+ 
+   if ( lgrTotale > MaxSize ) {
+      dbg.Verbose(0, "gdcmFile::GetImageDataIntoVector: pixel data bigger"
+                     "than caller's expected MaxSize");
+      return (size_t)0; 
+   }
+	
+   (void)ReadPixelData(destination);
+			
+	// Nombre de Bits Alloues pour le stockage d'un Pixel
+   str_nb = GetPubElValByNumber(0x0028,0x0100);
+   if (str_nb == "gdcm::Unfound" ) {
+      nb = 16;
+   } else {
+      nb = atoi(str_nb.c_str() );
+   }
+	
+	// Nombre de Bits Utilises
+   str_nbu=GetPubElValByNumber(0x0028,0x0101);
+   if (str_nbu == "gdcm::Unfound" ) {
+      nbu = nb;
+   } else {
+      nbu = atoi(str_nbu.c_str() );
+   }	
+	
+	// Position du Bit de Poids Fort
+   str_highBit=GetPubElValByNumber(0x0028,0x0102);
+   if (str_highBit == "gdcm::Unfound" ) {
+      highBit = nb - 1;
+   } else {
+      highBit = atoi(str_highBit.c_str() );
+   }
+		
+	// Signe des Pixels 
+   str_signe=GetPubElValByNumber(0x0028,0x0103);
+   if (str_signe == "gdcm::Unfound" ) {
+      signe = 1;
+   } else {
+      signe = atoi(str_signe.c_str() );
+   }
+
+   // re arange bytes inside the integer
+   if (nb != 8)
+     SwapZone(destination, GetSwapCode(), lgrTotale, nb);
+ 
+   // re arange bits inside the bytes
+   if (nbu != nb){
+      int l = (int)lgrTotale / (nb/8);
+      if (nb == 16) {
+         guint16 mask = 0xffff;
+         mask = mask >> (nb-nbu);
+         guint16 *deb = (guint16 *)destination;
+         for(int i = 0; i<l; i++) {
+            *deb = (*deb >> (nbu-highBit-1)) & mask;
+            deb ++;
+         }
+      } else if (nb == 32 ) {
+         guint32 mask = 0xffffffff;
+         mask = mask >> (nb-nbu);
+         guint32 *deb = (guint32 *)destination;
+         for(int i = 0; i<l; i++) {
+            *deb = (*deb >> (nbu-highBit-1)) & mask;
+            deb ++;
+         }
+      } else {
+         dbg.Verbose(0, "gdcmFile::GetImageDataIntoVector: wierd image");
+         return (size_t)0; 
+      }
+   }  
+   
+   // Try to deal with the color
+   // --------------------------
+     
+   string str_PhotometricInterpretation = gdcmHeader::GetPubElValByNumber(0x0028,0x0004);
+   
+   if ( (str_PhotometricInterpretation == "MONOCHROME1 ") 
+     || (str_PhotometricInterpretation == "MONOCHROME2 ") 
+     || (str_PhotometricInterpretation == "RGB")) {
+      return lgrTotale; 
+   }
+     
+   switch ( GetPlanarConfiguration() ) {
+   case 0:                              
+      //       Pixels are already RGB
+      break;
+   
+   case 1:
+      //       need to make RGB Pixels from Planes R,G,B
+      {
+         int l = lgrTotale/3 ;
+
+         char * a = (char *)destination;
+         char * b = a + l;
+         char * c = b + l;
+         char * newDest = (char*) malloc(lgrTotale);
+         // TODO :
+         // any trick not to have to allocate temporary buffer is welcome ...
+         char *x = newDest;
+         for (int j=0;j<l; j++) {
+            *(x++) = *(a++);
+            *(x++) = *(b++);
+            *(x++) = *(c++);  
+         }
+         memmove(destination,newDest,lgrTotale);
+         free(newDest);
+         // now, it's an RGB image
+         string spp = "3";
+         gdcmHeader::SetPubElValByNumber(spp,0x0028,0x0002);
+         string rgb="RGB";
+         gdcmHeader::SetPubElValByNumber(rgb,0x0028,0x0004);
+         break;
+      }
+      
+    case 2:                      
+      //       from Lut R + Lut G + Lut B
+       
+      // we no longer use gdcmHeader::GetLUTRGB
+      // since a lot of images have wrong info 
+      // in the Lookup Table Descriptors (0028,1101),...
+      {
+         unsigned char *lutR =(unsigned char *)GetPubElValVoidAreaByNumber(0x0028,0x1201);
+         unsigned char *lutG =(unsigned char *)GetPubElValVoidAreaByNumber(0x0028,0x1202);
+         unsigned char *lutB =(unsigned char *)GetPubElValVoidAreaByNumber(0x0028,0x1203);
+      
+         if (lutR && lutG && lutB ) { // need to make RGB Pixels 
+                                      // from grey Pixels 
+                                      // and Lut R,Lut G,Lut B
+            unsigned char * newDest = (unsigned char*) malloc(lgrTotale);
+            int l = lgrTotale/3;
+            memmove(newDest, destination, l);// move Gray pixels to temp area
+
+            unsigned char * x = newDest;
+            unsigned char * a = (unsigned char *)destination;
+            int j;        
+            for (int i=0;i<l; i++) {
+               j=newDest[i]*2;  // Who can explain *why* we have to skip bytes
+               *a++ = lutR[j]; 
+               *a++ = lutG[j];
+               *a++ = lutB[j];
+            }
+            free(newDest);
+         
+            // now, it's an RGB image      
+           string spp = "3";
+            gdcmHeader::SetPubElValByNumber(spp,0x0028,0x0002); 
+           string rgb="RGB";
+           gdcmHeader::SetPubElValByNumber(rgb,0x0028,0x0004);
+            
+         } else { // need to make RGB Pixels (?)
+               // from grey Pixels (?!)
+               // and Gray Lut  (!?!) 
+            unsigned char *lutGray =(unsigned char *)GetPubElValVoidAreaByNumber(0x0028,0x1200); 
+                 // Well . I'll wait till I find such an image 
+         }
+         break;
+      }
+   } 
+    
+   return lgrTotale; 
+}
+
+//
+// Je laisse le code integral, au cas ça puisse etre reutilise ailleurs
+//
+
+/**
+ * \ingroup gdcmFile
+ * \brief   Swap the bytes, according to swap code.
+ * \warning not end user intended
+ * @param   im area to deal with
+ * @param   swap swap code
+ * @param   lgr Area Length
+ * @param   nb Pixels Bit number 
+ */
+
+void gdcmFile::SwapZone(void* im, int swap, int lgr, int nb) {
+guint32 s32;
+guint16 fort,faible;
+int i;
+
+if(nb == 16)  
+   switch(swap) {
+      case 0:
+      case 12:
+      case 1234:
+         break;
+		
+      case 21:
+      case 3412:
+      case 2143:
+      case 4321:
+
+         for(i=0;i<lgr;i++)
+            ((unsigned short int*)im)[i]= ((((unsigned short int*)im)[i])>>8)
+                                        | ((((unsigned short int*)im)[i])<<8);
+         break;
+ 			
+      default:
+         printf("valeur de SWAP (16 bits) not allowed : %d\n", swap);
+   } 
+ 
+if( nb == 32 )
+   switch (swap) {
+      case 0:
+      case 1234:
+         break;
+
+      case 4321:
+         for(i=0;i<lgr;i++) {
+            faible=  ((unsigned long int*)im)[i]&0x0000ffff;    /* 4321 */
+            fort  =((unsigned long int*)im)[i]>>16;
+            fort=  (fort>>8)   | (fort<<8);
+            faible=(faible>>8) | (faible<<8);
+            s32=faible;
+            ((unsigned long int*)im)[i]=(s32<<16)|fort;
+         }
+         break;
+
+      case 2143:
+         for(i=0;i<lgr;i++) {
+            faible=  ((unsigned long int*)im)[i]&0x0000ffff;    /* 2143 */
+            fort=((unsigned long int*)im)[i]>>16;
+            fort=  (fort>>8)   | (fort<<8);
+            faible=(faible>>8) | (faible<<8);
+            s32=fort; 
+            ((unsigned long int*)im)[i]=(s32<<16)|faible;
+         }
+         break;
+  
+      case 3412:
+         for(i=0;i<lgr;i++) {
+            faible=  ((unsigned long int*)im)[i]&0x0000ffff;    /* 3412 */
+            fort=((unsigned long int*)im)[i]>>16;                  
+            s32=faible; 
+            ((unsigned long int*)im)[i]=(s32<<16)|fort;
+         }                 
+         break; 
+    			        
+      default:
+         printf(" SWAP value (32 bits) not allowed : %d\n", swap);
+   } 
+return;
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief TODO JPR
+ * \warning doit-etre etre publique ?  
+ * TODO : y a-t-il un inconvenient à fusioner ces 2 fonctions
+ *
+ * @param inData 
+ * @param ExpectedSize 
+ *
+ * @return integer acts as a boolean	
+ */
+int gdcmFile::SetImageData(void * inData, size_t ExpectedSize) {
+   SetImageDataSize(ExpectedSize);
+   PixelData = inData;
+   lgrTotale = ExpectedSize;
+   return(1);
+}
+
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief Sets the Pixel Area size in the Header
+ *        --> not-for-rats function
+ * 
+ * \warning WARNING doit-etre etre publique ? 
+ * TODO : y aurait il un inconvenient à fusionner ces 2 fonctions
+ *
+ * @param ImageDataSize new Pixel Area Size
+ *        warning : nothing else is checked
+ */
+
+void gdcmFile::SetImageDataSize(size_t ImageDataSize) {
+   string content1;
+   char car[20];	
+   // Assumes ElValue (0x7fe0, 0x0010) exists ...	
+   sprintf(car,"%d",ImageDataSize);
+ 
+   gdcmElValue*a = GetElValueByNumber(0x7fe0, 0x0010);
+   a->SetLength(ImageDataSize);
+ 		
+   ImageDataSize+=8;
+   sprintf(car,"%d",ImageDataSize);
+   content1=car;	
+   SetPubElValByNumber(content1, 0x7fe0, 0x0000);
+}
+
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief 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
+ *        (Equivalent a IdImaWriteRawFile) 
+ *
+ * @param fileName 
+ * @return	
+ */
+
+int gdcmFile::WriteRawData (string fileName) {
+   FILE * fp1;
+   fp1 = fopen(fileName.c_str(),"wb");
+   if (fp1 == NULL) {
+      printf("Echec ouverture (ecriture) Fichier [%s] \n",fileName.c_str());
+      return (0);
+   } 	
+   fwrite (PixelData,lgrTotale, 1, fp1);
+   fclose (fp1);
+   return(1);
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief Ecrit sur disque UNE image Dicom
+ *        Aucun test n'est fait sur l'"Endiannerie" du processeur.
+ *         Ca fonctionnera correctement (?) sur processeur Intel
+ *         (Equivalent a IdDcmWrite) 
+ *
+ * @param fileName 
+ * @return int acts as a boolean
+ */
+
+int gdcmFile::WriteDcmImplVR (string fileName) {
+   return WriteBase(fileName, ImplicitVR);
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief  
+ * @param  fileName 
+ * @return int acts as a boolean
+ */
+ 
+int gdcmFile::WriteDcmImplVR (const char* fileName) {
+   return WriteDcmImplVR (string (fileName));
+}
 	
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief  
+ * @param  fileName
+ * @return int acts as a boolean
+ */
+
+int gdcmFile::WriteDcmExplVR (string fileName) {
+   return WriteBase(fileName, ExplicitVR);
+}
+	
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ * \brief  Ecrit au format ACR-NEMA sur disque l'entete et les pixels
+ *        (a l'attention des logiciels cliniques 
+ *        qui ne prennent en entrée QUE des images ACR ...
+ * \warning si un header DICOM est fourni en entree,
+ *        les groupes < 0x0008 et les groupes impairs sont ignores)
+ * \warning Aucun test n'est fait sur l'"Endiannerie" du processeur.
+ *        Ca fonctionnera correctement (?) sur processeur Intel
+ *        (Equivalent a IdDcmWrite) 
+ *
+ * @param fileName
+ * @return int acts as a boolean	
+ */
+
+int gdcmFile::WriteAcr (string fileName) {
+   return WriteBase(fileName, ACR);
+}
+
+/////////////////////////////////////////////////////////////////
+/**
+ * \ingroup   gdcmFile
+ *
+ * @param  FileName
+ * @param  type 
+ *
+ * @return int acts as a boolean
+ */
+int gdcmFile::WriteBase (string FileName, FileType type) {
+
+   FILE * fp1;
+   fp1 = fopen(FileName.c_str(),"wb");
+   if (fp1 == NULL) {
+      printf("Echec ouverture (ecriture) Fichier [%s] \n",FileName.c_str());
+      return (0);
+   }
+
+   if ( (type == ImplicitVR) || (type == ExplicitVR) ) {
+      char * filePreamble;
+      // writing Dicom File Preamble
+      filePreamble=(char*)calloc(128,1);
+      fwrite(filePreamble,128,1,fp1);
+      fwrite("DICM",4,1,fp1);
+   }
+
+   gdcmHeader::Write(fp1, type);
+   fwrite(PixelData, lgrTotale, 1, fp1);
+   fclose (fp1);
+   return(1);
 }