-/**
- * \ingroup gdcmFile
- * \brief Copies at most MaxSize bytes of pixel data to caller's
- * memory space.
- * \warning This function was designed to avoid people that want to build
- * a volume from an image stack to need first to get the image pixels
- * and then move them to the volume area.
- * It's absolutely useless for any VTK user since vtk chooses
- * to invert the lines of an image, that is the last line comes first
- * (for some axis related reasons?). Hence he will have
- * to load the image line by line, starting from the end.
- * VTK users hace to call GetImageData
- * \warning DOES NOT transform the Grey Plane + Palette Color (if any)
- * into a single RGB Pixels Plane
- * the (VTK) user will manage the palettes
- *
- * @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::GetImageDataIntoVectorRaw (void* destination, size_t MaxSize) {
-
- int nb, nbu, highBit, signe;
- std::string str_nbFrames, str_nb, str_nbu, str_highBit, str_signe;
- PixelRead=1 ; // PixelRaw
-
- if ( lgrTotale > MaxSize ) {
- dbg.Verbose(0, "gdcmFile::GetImageDataIntoVector: pixel data bigger"
- "than caller's expected MaxSize");
- return (size_t)0;
- }
-
- (void)ReadPixelData(destination);
-
- // Number of Bits Allocated for storing a Pixel
- str_nb = Header->GetEntryByNumber(0x0028,0x0100);
- if (str_nb == GDCM_UNFOUND ) {
- nb = 16;
- } else {
- nb = atoi(str_nb.c_str() );
- }
- // Number of Bits actually used
- str_nbu=Header->GetEntryByNumber(0x0028,0x0101);
- if (str_nbu == GDCM_UNFOUND ) {
- nbu = nb;
- } else {
- nbu = atoi(str_nbu.c_str() );
- }
- // High Bit Position
- str_highBit=Header->GetEntryByNumber(0x0028,0x0102);
- if (str_highBit == GDCM_UNFOUND ) {
- highBit = nb - 1;
- } else {
- highBit = atoi(str_highBit.c_str() );
- }
- // Pixel sign
- // 0 = Unsigned
- // 1 = Signed
- str_signe=Header->GetEntryByNumber(0x0028,0x0103);
- if (str_signe == GDCM_UNFOUND ) {
- signe = 0; // default is unsigned
- } else {
- signe = atoi(str_signe.c_str() );
- }
-
- // re arange bytes inside the integer (processor endianity)
- if (nb != 8)
- SwapZone(destination, Header->GetSwapCode(), lgrTotale, nb);
-
- // to avoid pb with some xmedcon breakers images
- if (nb==16 && nbu<nb && signe==0) {
- int l = (int)lgrTotale / (nb/8);
- guint16 *deb = (guint16 *)destination;
- for(int i = 0; i<l; i++) {
- if(*deb == 0xffff)
- *deb=0;
- deb++;
- }
- }
-
- // 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;
- }
- }
-// DO NOT remove this code commented out.
-// Nobody knows what's expecting you ...
-// Just to 'see' what was actually read on disk :-(
-
-// FILE * f2;
-// f2 = fopen("SpuriousFile.RAW","wb");
-// fwrite(destination,lgrTotale,1,f2);
-// fclose(f2);
-
- // Deal with the color
- // -------------------
-
- std::string str_PhotometricInterpretation =
- Header->GetEntryByNumber(0x0028,0x0004);
-
- if ( (str_PhotometricInterpretation == "MONOCHROME1 ")
- || (str_PhotometricInterpretation == "MONOCHROME2 ") ) {
- return lgrTotale;