2 //-----------------------------------------------------------------------------
5 #include "jpeg/ljpg/jpegless.h"
7 typedef std::pair<TagHeaderEntryHT::iterator,TagHeaderEntryHT::iterator> IterHT;
9 //-----------------------------------------------------------------------------
10 // Constructor / Destructor
13 * \brief Constructor dedicated to writing a new DICOMV3 part10 compliant
14 * file (see SetFileName, SetDcmTag and Write)
15 * Opens (in read only and when possible) an existing file and checks
16 * for DICOM compliance. Returns NULL on failure.
17 * \note the in-memory representation of all available tags found in
18 * the DICOM header is post-poned to first header information access.
19 * This avoid a double parsing of public part of the header when
20 * one sets an a posteriori shadow dictionary (efficiency can be
21 * seen as a side effect).
22 * @param header file to be opened for reading datas
25 gdcmFile::gdcmFile(gdcmHeader *header) {
28 PixelRead=-1; // no ImageData read yet.
30 if (Header->IsReadable())
31 SetPixelDataSizeFromHeader();
36 * \brief Constructor dedicated to writing a new DICOMV3 part10 compliant
37 * file (see SetFileName, SetDcmTag and Write)
38 * Opens (in read only and when possible) an existing file and checks
39 * for DICOM compliance. Returns NULL on failure.
40 * \note the in-memory representation of all available tags found in
41 * the DICOM header is post-poned to first header information access.
42 * This avoid a double parsing of public part of the header when
43 * one sets an a posteriori shadow dictionary (efficiency can be
44 * seen as a side effect).
45 * @param filename file to be opened for parsing
46 * @param exception_on_error whether we throw an exception or not
47 * @param enable_sequences = true to allow the header
48 * to be parsed *inside* the SeQuences,
49 * when they have an actual length
50 * \warning enable_sequences *has to be* true for reading PAPYRUS 3.0 files
51 * @param ignore_shadow to allow skipping the shadow elements,
52 * to save memory space.
53 * \warning The TRUE value for this param has to be used
54 * with a FALSE value for the 'enable_sequence' param.
55 * ('public elements' may be embedded in 'shadow Sequences')
57 gdcmFile::gdcmFile(std::string & filename,
58 bool exception_on_error,
59 bool enable_sequences,
61 Header=new gdcmHeader(filename.c_str(),
66 PixelRead=-1; // no ImageData read yet.
68 if (Header->IsReadable())
69 SetPixelDataSizeFromHeader();
74 * \brief Constructor dedicated to writing a new DICOMV3 part10 compliant
75 * file (see SetFileName, SetDcmTag and Write)
76 * Opens (in read only and when possible) an existing file and checks
77 * for DICOM compliance. Returns NULL on failure.
78 * \note the in-memory representation of all available tags found in
79 * the DICOM header is post-poned to first header information access.
80 * This avoid a double parsing of public part of the header when
81 * one sets an a posteriori shadow dictionary (efficiency can be
82 * seen as a side effect).
83 * @param filename file to be opened for parsing
84 * @param exception_on_error whether we throw an exception or not
85 * @param enable_sequences = true to allow the header
86 * to be parsed *inside* the SeQuences,
87 * when they have an actual length
88 * \warning enable_sequences *has to be* true for reading PAPYRUS 3.0 files
89 * @param ignore_shadow to allow skipping the shadow elements,
90 * to save memory space.
91 * \warning The TRUE value for this param has to be used
92 * with a FALSE value for the 'enable_sequence' param.
93 * ('public elements' may be embedded in 'shadow Sequences')
95 gdcmFile::gdcmFile(const char * filename,
96 bool exception_on_error,
97 bool enable_sequences,
99 Header=new gdcmHeader(filename,
104 PixelRead=-1; // no ImageData read yet.
106 if (Header->IsReadable())
107 SetPixelDataSizeFromHeader();
112 * \brief canonical destructor
113 * \note If the gdcmHeader is created by the gdcmFile, it is destroyed
116 gdcmFile::~gdcmFile(void) {
122 //-----------------------------------------------------------------------------
125 //-----------------------------------------------------------------------------
129 * \brief returns the gdcmHeader *Header
132 gdcmHeader *gdcmFile::GetHeader(void) {
138 * \brief computes the length (in bytes) to ALLOCATE to receive the
139 * image(s) pixels (multiframes taken into account)
140 * \warning : it is NOT the group 7FE0 length
141 * (no interest for compressed images).
142 * @return length to allocate
144 void gdcmFile::SetPixelDataSizeFromHeader(void) {
145 // see PS 3.3-2003 : C.7.6.3.2.1
155 // YBR_FULL_422 (no LUT, no Palette)
161 // ex : gdcm-US-ALOKA-16.dcm
162 // 0028|1221 [OW] [Segmented Red Palette Color Lookup Table Data]
163 // 0028|1222 [OW] [Segmented Green Palette Color Lookup Table Data]
164 // 0028|1223 [OW] [Segmented Blue Palette Color Lookup Table Data]
166 // ex : OT-PAL-8-face.dcm
167 // 0028|1201 [US] [Red Palette Color Lookup Table Data]
168 // 0028|1202 [US] [Green Palette Color Lookup Table Data]
169 // 0028|1203 [US] [Blue Palette Color Lookup Table Data]
173 str_nb=Header->GetEntryByNumber(0x0028,0x0100);
174 if (str_nb == GDCM_UNFOUND ) {
177 nb = atoi(str_nb.c_str() );
178 if (nb == 12) nb =16;
180 lgrTotale = lgrTotaleRaw = Header->GetXSize() * Header->GetYSize()
181 * Header->GetZSize() * (nb/8)* Header->GetSamplesPerPixel();
182 std::string str_PhotometricInterpretation =
183 Header->GetEntryByNumber(0x0028,0x0004);
185 /*if ( str_PhotometricInterpretation == "PALETTE COLOR " )*/
186 // pb when undealt Segmented Palette Color
188 if (Header->HasLUT()) {
195 * \brief Returns the size (in bytes) of required memory to hold
196 * the pixel data represented in this file.
197 * @return The size of pixel data in bytes.
199 size_t gdcmFile::GetImageDataSize(void) {
205 * \brief Returns the size (in bytes) of required memory to hold
206 * the pixel data represented in this file, when user DOESN'T want
207 * to get RGB pixels image when it's stored as a PALETTE COLOR image
208 * -the (vtk) user is supposed to know how deal with LUTs-
209 * \warning to be used with GetImagePixelsRaw()
210 * @return The size of pixel data in bytes.
212 size_t gdcmFile::GetImageDataSizeRaw(void) {
213 return (lgrTotaleRaw);
218 * \brief Allocates necessary memory, copies the pixel data
219 * (image[s]/volume[s]) to newly allocated zone.
220 * Transforms YBR pixels into RGB pixels if any
221 * Transforms 3 planes R, G, B into a single RGB Plane
222 * Transforms single Grey plane + 3 Palettes into a RGB Plane
223 * @return Pointer to newly allocated pixel data.
224 * NULL if alloc fails
226 void * gdcmFile::GetImageData (void) {
227 PixelData = (void *) malloc(lgrTotale);
229 GetImageDataIntoVector(PixelData, lgrTotale);
231 PixelRead=0; // no PixelRaw
237 * \brief Copies at most MaxSize bytes of pixel data to caller's
239 * \warning This function was designed to avoid people that want to build
240 * a volume from an image stack to need first to get the image pixels
241 * and then move them to the volume area.
242 * It's absolutely useless for any VTK user since vtk chooses
243 * to invert the lines of an image, that is the last line comes first
244 * (for some axis related reasons?). Hence he will have
245 * to load the image line by line, starting from the end.
246 * VTK users have to call GetImageData
248 * @param destination Address (in caller's memory space) at which the
249 * pixel data should be copied
250 * @param MaxSize Maximum number of bytes to be copied. When MaxSize
251 * is not sufficient to hold the pixel data the copy is not
252 * executed (i.e. no partial copy).
253 * @return On success, the number of bytes actually copied. Zero on
254 * failure e.g. MaxSize is lower than necessary.
256 size_t gdcmFile::GetImageDataIntoVector (void* destination, size_t MaxSize) {
257 size_t l = GetImageDataIntoVectorRaw (destination, MaxSize);
258 PixelRead=0 ; // no PixelRaw
259 if (!Header->HasLUT())
262 // from Lut R + Lut G + Lut B
263 unsigned char * newDest = (unsigned char *)malloc(lgrTotale);
264 unsigned char * a = (unsigned char *)destination;
265 unsigned char * lutRGBA = Header->GetLUTRGBA();
267 int l = lgrTotaleRaw;
268 memmove(newDest, destination, l);// move Gray pixels to temp area
270 for (int i=0;i<l; i++) { // Build RGB Pixels
278 // now, it's an RGB image
279 // Lets's write it in the Header
281 // CreateOrReplaceIfExist ?
283 std::string spp = "3"; // Samples Per Pixel
284 Header->SetEntryByNumber(spp,0x0028,0x0002);
285 std::string rgb= "RGB "; // Photometric Interpretation
286 Header->SetEntryByNumber(rgb,0x0028,0x0004);
287 std::string planConfig = "0"; // Planar Configuration
288 Header->SetEntryByNumber(planConfig,0x0028,0x0006);
291 // need to make RGB Pixels (?)
292 // from grey Pixels (?!)
293 // and Gray Lut (!?!)
294 // or Segmented xxx Palette Color Lookup Table Data and so on
296 // Oops! I get one (gdcm-US-ALOKA-16.dcm)
297 // No idea how to manage such an image
298 // It seems that *no Dicom Viewer* has any idea :-(
299 // Segmented xxx Palette Color are *more* than 65535 long ?!?
301 std::string rgb= "MONOCHROME1 "; // Photometric Interpretation
302 Header->SetEntryByNumber(rgb,0x0028,0x0004);
304 // TODO : Drop Palette Color out of the Header?
310 * \brief Allocates necessary memory, copies the pixel data
311 * (image[s]/volume[s]) to newly allocated zone.
312 * Transforms YBR pixels into RGB pixels if any
313 * Transforms 3 planes R, G, B into a single RGB Plane
314 * DOES NOT transform Grey plane + 3 Palettes into a RGB Plane
315 * @return Pointer to newly allocated pixel data.
316 * \ NULL if alloc fails
318 void * gdcmFile::GetImageDataRaw (void) {
319 if (Header->HasLUT())
320 lgrTotale /= 3; // TODO Let gdcmHeadar user a chance
321 // to get the right value
322 // Create a member lgrTotaleRaw ???
323 PixelData = (void *) malloc(lgrTotale);
325 GetImageDataIntoVectorRaw(PixelData, lgrTotale);
326 PixelRead=1; // PixelRaw
332 * \brief Copies at most MaxSize bytes of pixel data to caller's
334 * \warning This function was designed to avoid people that want to build
335 * a volume from an image stack to need first to get the image pixels
336 * and then move them to the volume area.
337 * It's absolutely useless for any VTK user since vtk chooses
338 * to invert the lines of an image, that is the last line comes first
339 * (for some axis related reasons?). Hence he will have
340 * to load the image line by line, starting from the end.
341 * VTK users hace to call GetImageData
342 * \warning DOES NOT transform the Grey Plane + Palette Color (if any)
343 * into a single RGB Pixels Plane
344 * the (VTK) user will manage the palettes
346 * @param destination Address (in caller's memory space) at which the
347 * pixel data should be copied
348 * @param MaxSize Maximum number of bytes to be copied. When MaxSize
349 * is not sufficient to hold the pixel data the copy is not
350 * executed (i.e. no partial copy).
351 * @return On success, the number of bytes actually copied. Zero on
352 * failure e.g. MaxSize is lower than necessary.
354 size_t gdcmFile::GetImageDataIntoVectorRaw (void* destination, size_t MaxSize) {
356 int nb, nbu, highBit, signe;
357 std::string str_nbFrames, str_nb, str_nbu, str_highBit, str_signe;
358 PixelRead=1 ; // PixelRaw
360 if ( lgrTotale > MaxSize ) {
361 dbg.Verbose(0, "gdcmFile::GetImageDataIntoVector: pixel data bigger"
362 "than caller's expected MaxSize");
366 (void)ReadPixelData(destination);
368 // Number of Bits Allocated for storing a Pixel
369 str_nb = Header->GetEntryByNumber(0x0028,0x0100);
370 if (str_nb == GDCM_UNFOUND ) {
373 nb = atoi(str_nb.c_str() );
375 // Number of Bits actually used
376 str_nbu=Header->GetEntryByNumber(0x0028,0x0101);
377 if (str_nbu == GDCM_UNFOUND ) {
380 nbu = atoi(str_nbu.c_str() );
383 str_highBit=Header->GetEntryByNumber(0x0028,0x0102);
384 if (str_highBit == GDCM_UNFOUND ) {
387 highBit = atoi(str_highBit.c_str() );
392 str_signe=Header->GetEntryByNumber(0x0028,0x0103);
393 if (str_signe == GDCM_UNFOUND ) {
394 signe = 0; // default is unsigned
396 signe = atoi(str_signe.c_str() );
399 // re arange bytes inside the integer (processor endianity)
401 SwapZone(destination, Header->GetSwapCode(), lgrTotale, nb);
403 // to avoid pb with some xmedcon breakers images
404 if (nb==16 && nbu<nb && signe==0) {
405 int l = (int)lgrTotale / (nb/8);
406 guint16 *deb = (guint16 *)destination;
407 for(int i = 0; i<l; i++) {
413 // re arange bits inside the bytes
415 int l = (int)lgrTotale / (nb/8);
417 guint16 mask = 0xffff;
418 mask = mask >> (nb-nbu);
419 guint16 *deb = (guint16 *)destination;
420 for(int i = 0; i<l; i++) {
421 *deb = (*deb >> (nbu-highBit-1)) & mask;
424 } else if (nb == 32 ) {
425 guint32 mask = 0xffffffff;
426 mask = mask >> (nb-nbu);
427 guint32 *deb = (guint32 *)destination;
428 for(int i = 0; i<l; i++) {
429 *deb = (*deb >> (nbu-highBit-1)) & mask;
433 dbg.Verbose(0, "gdcmFile::GetImageDataIntoVector: wierd image");
437 // DO NOT remove this commented out code .
438 // Nobody knows what's expecting you ...
439 // Just to 'see' what was actually read on disk :-(
442 // f2 = fopen("SpuriousFile.RAW","wb");
443 // fwrite(destination,lgrTotale,1,f2);
446 // Deal with the color
447 // -------------------
449 std::string str_PhotometricInterpretation =
450 Header->GetEntryByNumber(0x0028,0x0004);
452 if ( (str_PhotometricInterpretation == "MONOCHROME1 ")
453 || (str_PhotometricInterpretation == "MONOCHROME2 ") ) {
457 // Planar configuration = 0 : Pixels are already RGB
458 // Planar configuration = 1 : 3 planes : R, G, B
459 // Planar configuration = 2 : 1 gray Plane + 3 LUT
461 // Well ... supposed to be !
462 // See US-PAL-8-10x-echo.dcm: PlanarConfiguration=0,
463 // PhotometricInterpretation=PALETTE COLOR
464 // and heuristic has to be found :-(
466 int planConf=Header->GetPlanarConfiguration(); // 0028,0006
468 // Whatever Planar Configuration is,
469 // "PALETTE COLOR " implies that we deal with the palette.
470 if (str_PhotometricInterpretation == "PALETTE COLOR ")
475 // Pixels are already RGB
481 if (str_PhotometricInterpretation == "YBR_FULL") {
483 // Warning : YBR_FULL_422 acts as RGB
484 // : we need to make RGB Pixels from Planes Y,cB,cR
486 // to see the tricks about YBR_FULL, YBR_FULL_422,
487 // YBR_PARTIAL_422, YBR_ICT, YBR_RCT have a look at :
488 // ftp://medical.nema.org/medical/dicom/final/sup61_ft.pdf
489 // and be *very* affraid
491 int l = Header->GetXSize()*Header->GetYSize();
492 int nbFrames = Header->GetZSize();
494 unsigned char * newDest = (unsigned char*) malloc(lgrTotale);
495 unsigned char *x = newDest;
496 unsigned char * a = (unsigned char *)destination;
497 unsigned char * b = a + l;
498 unsigned char * c = b + l;
501 // TODO : Replace by the 'well known'
502 // integer computation counterpart
503 // see http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf
504 // for code optimisation
506 for (int i=0;i<nbFrames;i++) {
507 for (int j=0;j<l; j++) {
508 R= 1.164 *(*a-16) + 1.596 *(*c -128) + 0.5;
509 G= 1.164 *(*a-16) - 0.813 *(*c -128) - 0.392 *(*b -128) + 0.5;
510 B= 1.164 *(*a-16) + 2.017 *(*b -128) + 0.5;
515 if (R>255.0) R=255.0;
516 if (G>255.0) G=255.0;
517 if (B>255.0) B=255.0;
519 *(x++) = (unsigned char)R;
520 *(x++) = (unsigned char)G;
521 *(x++) = (unsigned char)B;
525 memmove(destination,newDest,lgrTotale);
530 // need to make RGB Pixels from R,G,B Planes
531 // (all the Frames at a time)
533 int l = Header->GetXSize()*Header->GetYSize()*Header->GetZSize();
535 char * newDest = (char*) malloc(lgrTotale);
537 char * a = (char *)destination;
541 for (int j=0;j<l; j++) {
546 memmove(destination,newDest,lgrTotale);
552 // Palettes were found
553 // Let the user deal with them !
556 // now, it's an RGB image
557 // Lets's write it in the Header
559 // CreateOrReplaceIfExist ?
561 std::string spp = "3"; // Samples Per Pixel
562 Header->SetEntryByNumber(spp,0x0028,0x0002);
563 std::string rgb="RGB "; // Photometric Interpretation
564 Header->SetEntryByNumber(rgb,0x0028,0x0004);
566 std::string planConfig = "0"; // Planar Configuration
567 Header->SetEntryByNumber(planConfig,0x0028,0x0006);
569 // TODO : Drop Palette Color out of the Header?
575 * \brief performs a shadow copy (not a deep copy) of the user given
577 * 'image' Pixels are presented as C-like 2D arrays : line per line.
578 * 'volume'Pixels are presented as C-like 3D arrays : lane per plane
579 * \warning user is kindly requested NOT TO 'free' the Pixel area
580 * @param inData user supplied pixel area
581 * @param ExpectedSize total image size, in Bytes
585 bool gdcmFile::SetImageData(void * inData, size_t ExpectedSize) {
586 Header->SetImageDataSize(ExpectedSize);
588 lgrTotale = ExpectedSize;
594 * \brief Writes on disk A SINGLE Dicom file
595 * NO test is performed on processor "Endiannity".
596 * It's up to the user to call his Reader properly
597 * @param fileName name of the file to be created
598 * (any already existing file is over written)
599 * @return false if write fails
602 bool gdcmFile::WriteRawData (std::string fileName) {
604 fp1 = fopen(fileName.c_str(),"wb");
606 printf("Fail to open (write) file [%s] \n",fileName.c_str());
609 fwrite (PixelData,lgrTotale, 1, fp1);
616 * \brief Writes on disk A SINGLE Dicom file,
617 * using the Implicit Value Representation convention
618 * NO test is performed on processor "Endiannity".
619 * @param fileName name of the file to be created
620 * (any already existing file is overwritten)
621 * @return false if write fails
624 bool gdcmFile::WriteDcmImplVR (std::string fileName) {
625 return WriteBase(fileName, ImplicitVR);
630 * \brief Writes on disk A SINGLE Dicom file,
631 * using the Implicit Value Representation convention
632 * NO test is performed on processor "Endiannity". * @param fileName name of the file to be created
633 * (any already existing file is overwritten)
634 * @return false if write fails
637 bool gdcmFile::WriteDcmImplVR (const char* fileName) {
638 return WriteDcmImplVR (std::string (fileName));
643 * \brief Writes on disk A SINGLE Dicom file,
644 * using the Explicit Value Representation convention
645 * NO test is performed on processor "Endiannity". * @param fileName name of the file to be created
646 * (any already existing file is overwritten)
647 * @return false if write fails
650 bool gdcmFile::WriteDcmExplVR (std::string fileName) {
651 return WriteBase(fileName, ExplicitVR);
656 * \brief Writes on disk A SINGLE Dicom file,
657 * using the ACR-NEMA convention
658 * NO test is performed on processor "Endiannity".
659 * (a l'attention des logiciels cliniques
660 * qui ne prennent en entrée QUE des images ACR ...
661 * \warning if a DICOM_V3 header is supplied,
662 * groups < 0x0008 and shadow groups are ignored
663 * \warning NO TEST is performed on processor "Endiannity".
664 * @param fileName name of the file to be created
665 * (any already existing file is overwritten)
666 * @return false if write fails
669 bool gdcmFile::WriteAcr (std::string fileName) {
670 return WriteBase(fileName, ACR);
673 //-----------------------------------------------------------------------------
677 * \brief NOT a end user inteded function
678 * (used by WriteDcmExplVR, WriteDcmImplVR, WriteAcr, etc)
679 * @param fileName name of the file to be created
680 * (any already existing file is overwritten)
681 * @param type file type (ExplicitVR, ImplicitVR, ...)
682 * @return false if write fails
684 bool gdcmFile::WriteBase (std::string fileName, FileType type) {
688 if (PixelRead==-1 && type != ExplicitVR) {
692 fp1 = fopen(fileName.c_str(),"wb");
694 printf("Failed to open (write) File [%s] \n",fileName.c_str());
698 if ( (type == ImplicitVR) || (type == ExplicitVR) ) {
700 // writing Dicom File Preamble
701 filePreamble=(char*)calloc(128,1);
702 fwrite(filePreamble,128,1,fp1);
703 fwrite("DICM",4,1,fp1);
707 // --------------------------------------------------------------
708 // Special Patch to allow gdcm to re-write ACR-LibIDO formated images
710 // if recognition code tells us we dealt with a LibIDO image
711 // we reproduce on disk the switch between lineNumber and columnNumber
712 // just before writting ...
714 // TODO : the best trick would be *change* the recognition code
715 // but pb expected if user deals with, e.g. COMPLEX images
717 std::string rows, columns;
718 if ( Header->GetFileType() == ACR_LIBIDO){
719 rows = Header->GetEntryByNumber(0x0028, 0x0010);
720 columns = Header->GetEntryByNumber(0x0028, 0x0011);
721 Header->SetEntryByNumber(columns, 0x0028, 0x0010);
722 Header->SetEntryByNumber(rows , 0x0028, 0x0011);
724 // ----------------- End of Special Patch ----------------
726 // TODO : get the grPixel, numPixel values (for some ACR-NEMA images only)
728 guint16 grPixel =Header->GetGrPixel();
729 guint16 numPixel=Header->GetNumPixel();;
731 // Update Pixel Data Length
732 // the *last* of the (GrPixel, NumPixel), if many.
734 TagKey key = gdcmDictEntry::TranslateToKey(grPixel, numPixel);
735 TagHeaderEntryHT::iterator p2;
736 gdcmHeaderEntry * PixelElement;
738 IterHT it= Header->GetEntry().equal_range(key); // get a pair of iterators first-last synonym
740 if (Header->GetEntry().count(key) == 1) // only the first is significant
741 p2=it.first; // iterator on the first (unique) synonym
743 p2=it.second;// iterator on the last synonym
745 PixelElement=p2->second; // H Table target column (2-nd col)
746 // PixelElement->SetPrintLevel(2);
747 // PixelElement->Print();
750 PixelElement->SetLength(lgrTotaleRaw);
751 else if (PixelRead==0)
752 PixelElement->SetLength(lgrTotale);
754 //PixelElement->SetPrintLevel(2);
755 //PixelElement->Print();
756 Header->Write(fp1, type);
758 // --------------------------------------------------------------
759 // Special Patch to allow gdcm to re-write ACR-LibIDO formated images
761 // ...and we restore the Header to be Dicom Compliant again
762 // just after writting
764 if (Header->GetFileType() == ACR_LIBIDO){
765 Header->SetEntryByNumber(rows , 0x0028, 0x0010);
766 Header->SetEntryByNumber(columns, 0x0028, 0x0011);
768 // ----------------- End of Special Patch ----------------
770 fwrite(PixelData, lgrTotale, 1, fp1);
775 //-----------------------------------------------------------------------------
779 * \brief Swap the bytes, according to swap code.
780 * \warning not end user intended
781 * @param im area to deal with
782 * @param swap swap code
783 * @param lgr Area Length
784 * @param nb Pixels Bit number
786 void gdcmFile::SwapZone(void* im, int swap, int lgr, int nb) {
803 for(i=0;i<lgr/2;i++) {
804 ((unsigned short int*)im)[i]= ((((unsigned short int*)im)[i])>>8)
805 | ((((unsigned short int*)im)[i])<<8);
810 printf("SWAP value (16 bits) not allowed : %d\n", swap);
820 for(i=0;i<lgr/4;i++) {
821 faible= ((unsigned long int*)im)[i]&0x0000ffff; /* 4321 */
822 fort =((unsigned long int*)im)[i]>>16;
823 fort= (fort>>8) | (fort<<8);
824 faible=(faible>>8) | (faible<<8);
826 ((unsigned long int*)im)[i]=(s32<<16)|fort;
831 for(i=0;i<lgr/4;i++) {
832 faible= ((unsigned long int*)im)[i]&0x0000ffff; /* 2143 */
833 fort=((unsigned long int*)im)[i]>>16;
834 fort= (fort>>8) | (fort<<8);
835 faible=(faible>>8) | (faible<<8);
837 ((unsigned long int*)im)[i]=(s32<<16)|faible;
842 for(i=0;i<lgr/4;i++) {
843 faible= ((unsigned long int*)im)[i]&0x0000ffff; /* 3412 */
844 fort=((unsigned long int*)im)[i]>>16;
846 ((unsigned long int*)im)[i]=(s32<<16)|fort;
851 printf("SWAP value (32 bits) not allowed : %d\n", swap);
858 * \brief Read pixel data from disk (optionaly decompressing) into the
859 * caller specified memory location.
860 * @param destination where the pixel data should be stored.
863 bool gdcmFile::ReadPixelData(void* destination) {
867 if ( !(fp=Header->OpenFile()))
869 if ( fseek(fp, Header->GetPixelOffset(), SEEK_SET) == -1 ) {
873 // ---------------------- Compacted File (12 Bits Per Pixel)
874 /* unpack 12 Bits pixels into 16 Bits pixels */
875 /* 2 pixels 12bit = [0xABCDEF] */
876 /* 2 pixels 16bit = [0x0ABD] + [0x0FCE] */
878 if (Header->GetBitsAllocated()==12) {
879 int nbPixels = Header->GetXSize() * Header->GetYSize();
880 unsigned char b0, b1, b2;
882 unsigned short int* pdestination = (unsigned short int*)destination;
883 for(int p=0;p<nbPixels;p+=2) {
887 //Two steps is necessary to please VC++
888 *pdestination++ = ((b0 >> 4) << 8) + ((b0 & 0x0f) << 4) + (b1 & 0x0f);
889 /* A */ /* B */ /* D */
890 *pdestination++ = ((b2 & 0x0f) << 8) + ((b1 >> 4) << 4) + (b2 >> 4);
891 /* F */ /* C */ /* E */
893 // Troubles expected on Big-Endian processors ?
900 // ---------------------- Uncompressed File
901 if ( !Header->IsDicomV3() ||
902 Header->IsImplicitVRLittleEndianTransferSyntax() ||
903 Header->IsExplicitVRLittleEndianTransferSyntax() ||
904 Header->IsExplicitVRBigEndianTransferSyntax() ||
905 Header->IsDeflatedExplicitVRLittleEndianTransferSyntax() ) {
907 size_t ItemRead = fread(destination, Header->GetPixelAreaLength(), 1, fp);
908 if ( ItemRead != 1 ) {
917 // ---------------------- Run Length Encoding
918 if (Header->IsRLELossLessTransferSyntax()) {
919 bool res = (bool)gdcm_read_RLE_file (fp,destination);
924 // --------------- SingleFrame/Multiframe JPEG Lossless/Lossy/2000
926 std::string str_nb=Header->GetEntryByNumber(0x0028,0x0100);
927 if (str_nb == GDCM_UNFOUND ) {
930 nb = atoi(str_nb.c_str() );
931 if (nb == 12) nb =16; // ?? 12 should be ACR-NEMA only ?
936 int taille = Header->GetXSize() * Header->GetYSize()
937 * Header->GetSamplesPerPixel();
938 long fragmentBegining; // for ftell, fseek
940 bool jpg2000 = Header->IsJPEG2000();
941 bool jpgLossless = Header->IsJPEGLossless();
944 guint16 ItemTagGr,ItemTagEl;
947 // Position on begining of Jpeg Pixels
949 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
950 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
951 if(Header->GetSwapCode()) {
952 ItemTagGr=Header->SwapShort(ItemTagGr);
953 ItemTagEl=Header->SwapShort(ItemTagEl);
956 if(Header->GetSwapCode())
957 ln=Header->SwapLong(ln); // Basic Offset Table Item length
960 // What is it used for ?!?
961 char *BasicOffsetTableItemValue = (char *)malloc(ln+1);
962 fread(BasicOffsetTableItemValue,ln,1,fp);
965 // first Fragment initialisation
966 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
967 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
968 if(Header->GetSwapCode()) {
969 ItemTagGr=Header->SwapShort(ItemTagGr);
970 ItemTagEl=Header->SwapShort(ItemTagEl);
973 // parsing fragments until Sequence Delim. Tag found
974 while ( ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) {
975 // --- for each Fragment
978 if(Header->GetSwapCode())
979 ln=Header->SwapLong(ln); // Fragment Item length
981 fragmentBegining=ftell(fp);
983 if (jpg2000) { // JPEG 2000 : call to ???
985 res = (bool)gdcm_read_JPEG2000_file (fp,destination); // Not Yet written
987 } // ------------------------------------- endif (JPEG2000)
989 else if (jpgLossless) { // JPEG LossLess : call to xmedcom JPEG
991 JPEGLosslessDecodeImage (fp, // Reading Fragment pixels
992 (unsigned short *)destination,
993 Header->GetPixelSize()*8* Header->GetSamplesPerPixel(),
995 res=1; // in order not to break the loop
997 } // ------------------------------------- endif (JPEGLossless)
999 else { // JPEG Lossy : call to IJG 6b
1001 if (Header->GetBitsStored() == 8) {
1002 res = (bool)gdcm_read_JPEG_file (fp,destination); // Reading Fragment pixels
1004 res = (bool)gdcm_read_JPEG_file12 (fp,destination);// Reading Fragment pixels
1006 } // ------------------------------------- endif (JPEGLossy)
1010 destination = (char *)destination + taille * nBytes; // location in user's memory
1011 // for next fragment (if any)
1013 fseek(fp,fragmentBegining,SEEK_SET); // To be sure we start
1014 fseek(fp,ln,SEEK_CUR); // at the begining of next fragment
1016 ItemTagGr = ItemTagEl =0;
1017 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
1018 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
1019 if(Header->GetSwapCode()) {
1020 ItemTagGr=Header->SwapShort(ItemTagGr);
1021 ItemTagEl=Header->SwapShort(ItemTagEl);
1024 } // endWhile parsing fragments until Sequence Delim. Tag found
1026 Header->CloseFile();
1029 //-----------------------------------------------------------------------------