1 /*=========================================================================
4 Module: $RCSfile: vtkGdcmReader.cxx,v $
6 Date: $Date: 2007/06/21 14:47:16 $
7 Version: $Revision: 1.91 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
19 //-----------------------------------------------------------------------------
20 // //////////////////////////////////////////////////////////////
22 //===> Many users expect from vtkGdcmReader it 'orders' the images
23 // (that's the job of GDCM_NAME_SPACE::SerieHelper ...)
24 // When user *knows* the files with same Serie UID
25 // have same sizes, same 'pixel' type, same color convention, ...
26 // the right way to proceed is as follow :
28 // GDCM_NAME_SPACE::SerieHelper *sh= new GDCM_NAME_SPACE::SerieHelper();
29 // // if user wants *not* to load some parts of the file headers
30 // sh->SetLoadMode(loadMode);
32 // // if user wants *not* to load some files
33 // sh->AddRestriction(group, element, value, operator);
34 // sh->AddRestriction( ...
35 // sh->SetDirectory(directoryWithImages);
37 // // if user wants to sort reverse order
38 // sh->SetSortOrderToReverse();
40 // // here, we suppose only the first 'Serie' is of interest
41 // // it's up to the user to decide !
42 // GDCM_NAME_SPACE::FileList *l = sh->GetFirstSingleSerieUIDFileSet();
44 // // if user is doesn't trust too much the files with same Serie UID
45 // if ( !sh->IsCoherent(l) )
46 // return; // not same sizes, same 'pixel' type -> stop
48 // // WARNING : all that follows works only with 'bona fide' Series
49 // // (In some Series; there are more than one 'orientation'
50 // // Don't expected to build a 'volume' with that!
52 // // -> use sh->SplitOnOrientation(l)
53 // // - or sh->SplitOnPosition(l), or SplitOnTagValue(l, gr, el) -
54 // // depending on what you want to do
55 // // and iterate on the various 'X Coherent File Sets'
57 // // if user *knows* he has to drop the 'duplicates' images
59 // sh->SetDropDuplicatePositions(true);
61 // // Sorting the list is mandatory
62 // // a side effect is to compute ZSpacing for the fle set
63 // sh->OrderFileList(l); // sort the list
65 // vtkGdcmReader *reader = vtkGdcmReader::New();
67 // // if user wants to modify pixel order (Mirror, TopDown, 90°Rotate, ...)
68 // // he has to supply the function that does the job
69 // // (a *very* simple example is given in vtkgdcmSerieViewer.cxx)
70 // reader->SetUserFunction (userSuppliedFunction);
72 // // to pass a 'Coherent File List' as produced by GDCM_NAME_SPACE::SerieHelper
73 // reader->SetCoherentFileList(l);
76 // WARNING TODO CLEANME
77 // Actual limitations of this code
78 // when a Coherent File List from SerieHelper is not used (bad idea :-(
80 // //////////////////////////////////////////////////////////////
82 #include "gdcmFileHelper.h"
84 #include "gdcmSerieHelper.h" // for ImagePositionPatientOrdering()
86 #include "vtkGdcmReader.h"
87 #include "gdcmDebug.h"
88 #include "gdcmCommon.h"
90 #include <vtkObjectFactory.h>
91 #include <vtkImageData.h>
92 #include <vtkPointData.h>
93 #include <vtkLookupTable.h>
95 vtkCxxRevisionMacro(vtkGdcmReader, "$Revision: 1.91 $")
96 vtkStandardNewMacro(vtkGdcmReader)
98 //-----------------------------------------------------------------------------
99 // Constructor / Destructor
100 vtkGdcmReader::vtkGdcmReader()
102 this->LookupTable = NULL;
103 this->AllowLookupTable = false;
104 //this->AllowLightChecking = false;
105 this->LoadMode = GDCM_NAME_SPACE::LD_ALL; // Load everything (possible values :
109 this->CoherentFileList = 0;
110 this->UserFunction = 0;
113 // this->Execution=false; // For VTK5.0
116 vtkGdcmReader::~vtkGdcmReader()
118 this->RemoveAllFileName();
119 this->InternalFileNameList.clear();
120 if(this->LookupTable)
121 this->LookupTable->Delete();
124 //-----------------------------------------------------------------------------
126 void vtkGdcmReader::PrintSelf(ostream &os, vtkIndent indent)
128 this->Superclass::PrintSelf(os,indent);
129 os << indent << "Filenames : " << endl;
130 vtkIndent nextIndent = indent.GetNextIndent();
131 for (std::list<std::string>::iterator it = FileNameList.begin();
132 it != FileNameList.end();
135 os << nextIndent << it->c_str() << endl ;
139 //-----------------------------------------------------------------------------
142 * Remove all files from the list of images to read.
144 void vtkGdcmReader::RemoveAllFileName(void)
146 this->FileNameList.clear();
151 * Adds a file name to the list of images to read.
153 void vtkGdcmReader::AddFileName(const char* name)
155 // We need to bypass the const pointer [since list<>.push_bash() only
156 // takes a char* (but not a const char*)] by making a local copy:
157 this->FileNameList.push_back(name);
162 * Sets up a filename to be read.
164 void vtkGdcmReader::SetFileName(const char *name)
166 vtkImageReader2::SetFileName(name);
167 // Since we maintain a list of filenames, when building a volume,
168 // (see vtkGdcmReader::AddFileName), we additionaly need to purge
169 // this list when we manually positionate the filename.
170 vtkDebugMacro(<< "Clearing all files given with AddFileName");
171 this->FileNameList.clear();
175 //-----------------------------------------------------------------------------
178 * Configure the output e.g. WholeExtent, spacing, origin, scalar type...
180 void vtkGdcmReader::ExecuteInformation()
182 // if(this->Execution) // For VTK5.0
185 // this->Execution=true; // end For VTK5.0
186 this->RemoveAllInternalFile();
187 if(this->MTime>this->fileTime)
189 this->TotalNumberOfPlanes = 0;
191 if ( this->CoherentFileList != 0 )
193 this->UpdateFileInformation();
197 this->BuildFileListFromPattern();
198 this->LoadFileInformation();
201 if ( this->TotalNumberOfPlanes == 0)
203 vtkErrorMacro(<< "File set is not coherent. Exiting...");
207 // if the user has not set the extent, but has set the VOI
208 // set the z axis extent to the VOI z axis
209 if (this->DataExtent[4]==0 && this->DataExtent[5] == 0 &&
210 (this->DataVOI[4] || this->DataVOI[5]))
212 this->DataExtent[4] = this->DataVOI[4];
213 this->DataExtent[5] = this->DataVOI[5];
216 // When the user has set the VOI, check it's coherence with the file content.
217 if (this->DataVOI[0] || this->DataVOI[1] ||
218 this->DataVOI[2] || this->DataVOI[3] ||
219 this->DataVOI[4] || this->DataVOI[5])
221 if ((this->DataVOI[0] < 0) ||
222 (this->DataVOI[1] >= this->NumColumns) ||
223 (this->DataVOI[2] < 0) ||
224 (this->DataVOI[3] >= this->NumLines) ||
225 (this->DataVOI[4] < 0) ||
226 (this->DataVOI[5] >= this->TotalNumberOfPlanes ))
228 vtkWarningMacro(<< "The requested VOI is larger than expected extent.");
229 this->DataVOI[0] = 0;
230 this->DataVOI[1] = this->NumColumns - 1;
231 this->DataVOI[2] = 0;
232 this->DataVOI[3] = this->NumLines - 1;
233 this->DataVOI[4] = 0;
234 this->DataVOI[5] = this->TotalNumberOfPlanes - 1;
239 this->DataExtent[0] = 0;
240 this->DataExtent[1] = this->NumColumns - 1;
241 this->DataExtent[2] = 0;
242 this->DataExtent[3] = this->NumLines - 1;
243 this->DataExtent[4] = 0;
244 this->DataExtent[5] = this->TotalNumberOfPlanes - 1;
246 // We don't need to set the Endian related stuff (by using
247 // this->SetDataByteOrderToBigEndian() or SetDataByteOrderToLittleEndian()
248 // since the reading of the file is done by gdcm.
249 // But we do need to set up the data type for downstream filters:
250 if ( ImageType == "8U" )
252 vtkDebugMacro(<< "8 bits unsigned image");
253 this->SetDataScalarTypeToUnsignedChar();
255 else if ( ImageType == "8S" )
257 vtkErrorMacro(<< "Cannot handle 8 bit signed files");
260 else if ( ImageType == "16U" )
262 vtkDebugMacro(<< "16 bits unsigned image");
263 this->SetDataScalarTypeToUnsignedShort();
265 else if ( ImageType == "16S" )
267 vtkDebugMacro(<< "16 bits signed image");
268 this->SetDataScalarTypeToShort();
270 else if ( ImageType == "32U" )
272 vtkDebugMacro(<< "32 bits unsigned image");
273 vtkDebugMacro(<< "WARNING: forced to signed int !");
274 this->SetDataScalarTypeToInt();
276 else if ( ImageType == "32S" )
278 vtkDebugMacro(<< "32 bits signed image");
279 this->SetDataScalarTypeToInt();
281 else if ( ImageType == "FD" )
283 vtkDebugMacro(<< "64 bits Double image");
284 this->SetDataScalarTypeToDouble();
286 //Set number of scalar components:
287 this->SetNumberOfScalarComponents(this->NumComponents);
289 this->fileTime=this->MTime;
292 this->Superclass::ExecuteInformation();
294 //this->GetOutput()->SetUpdateExtentToWholeExtent();// For VTK5.0
295 //this->BuildData(this->GetOutput());
297 //this->Execution=false;
298 //this->RemoveAllInternalFile(); // End For VTK5.0
302 * Update => ouput->Update => UpdateData => Execute => ExecuteData
303 * (see vtkSource.cxx for last step).
304 * This function (redefinition of vtkImageReader::ExecuteData, see
305 * VTK/IO/vtkImageReader.cxx) reads a data from a file. The data
306 * extent/axes are assumed to be the same as the file extent/order.
308 void vtkGdcmReader::ExecuteData(vtkDataObject *output)
310 vtkImageData *data=vtkImageData::SafeDownCast(output);
311 data->SetExtent(this->DataExtent);
313 /* if ( CoherentFileList != 0 ) // When a list of names is passed
315 if (this->CoherentFileList->empty())
317 vtkErrorMacro(<< "Coherent File List must have at least a valid File*.");
321 else if (this->InternalFileNameList.empty())
323 vtkErrorMacro(<< "A least a valid FileName must be specified.");
328 // data->AllocateScalars(); // For VTK5.0
329 // if (this->UpdateExtentIsEmpty(output))
333 //} // end For VTK5.0
335 data->AllocateScalars(); // For VTK5.0
336 if (this->UpdateExtentIsEmpty(output))
341 //void vtkGdcmReader::BuildData(vtkDataObject *output) // For VTK5.0
343 // vtkImageData *data = this->AllocateOutputData(output); // end For VTK5.0
345 data->GetPointData()->GetScalars()->SetName("DicomImage-Volume");
347 // Test if output has valid extent
348 // Prevent memory errors
349 if((this->DataExtent[1]-this->DataExtent[0]>=0) &&
350 (this->DataExtent[3]-this->DataExtent[2]>=0) &&
351 (this->DataExtent[5]-this->DataExtent[4]>=0))
353 // The memory size for a full stack of images of course depends
354 // on the number of planes and the size of each image:
355 //size_t StackNumPixels = this->NumColumns * this->NumLines
356 // * this->TotalNumberOfPlanes * this->NumComponents;
357 //size_t stack_size = StackNumPixels * this->PixelSize; //not used
358 // Allocate pixel data space itself.
360 // Variables for the UpdateProgress. We shall use 50 steps to signify
361 // the advance of the process:
362 unsigned long UpdateProgressTarget = (unsigned long) ceil (this->NumLines
363 * this->TotalNumberOfPlanes
365 // The actual advance measure:
366 unsigned long UpdateProgressCount = 0;
368 // Filling the allocated memory space with each image/volume:
370 size_t size = this->NumColumns * this->NumLines * this->NumPlanes
371 * data->GetScalarSize() * this->NumComponents;
372 unsigned char *Dest = (unsigned char *)data->GetScalarPointer();
373 for (std::vector<GDCM_NAME_SPACE::File* >::iterator it = InternalFileList.begin();
374 it != InternalFileList.end();
377 this->LoadImageInMemory(*it, Dest,
378 UpdateProgressTarget,
379 UpdateProgressCount);
383 this->RemoveAllInternalFile(); // For VTK5.0
387 * vtkGdcmReader can have the file names specified through two ways:
388 * (1) by calling the vtkImageReader2::SetFileName(), SetFilePrefix() and
390 * (2) By successive calls to vtkGdcmReader::AddFileName()
391 * When the first method was used by caller we need to update the local
394 void vtkGdcmReader::BuildFileListFromPattern()
396 this->RemoveAllInternalFileName();
398 // Test miscellanous cases
399 if ((! this->FileNameList.empty()) && this->FileName )
401 vtkErrorMacro(<< "Both AddFileName and SetFileName schemes were used");
402 vtkErrorMacro(<< "No images loaded ! ");
406 if ((! this->FileNameList.empty()) && this->FilePrefix )
408 vtkErrorMacro(<< "Both AddFileName and SetFilePrefix schemes were used");
409 vtkErrorMacro(<< "No images loaded ! ");
413 if (this->FileName && this->FilePrefix)
415 vtkErrorMacro(<< "Both SetFileName and SetFilePrefix schemes were used");
416 vtkErrorMacro(<< "No images loaded ! ");
420 // Create the InternalFileNameList
421 if (! this->FileNameList.empty() )
423 vtkDebugMacro(<< "Using the AddFileName specified files");
424 this->InternalFileNameList=this->FileNameList;
428 if (!this->FileName && !this->FilePrefix)
430 vtkErrorMacro(<< "FileNames are not set. Either use AddFileName() or");
431 vtkErrorMacro(<< "specify a FileName or FilePrefix.");
437 // Single file loading (as given with ::SetFileName()):
438 // Case of multi-frame file considered here
439 this->ComputeInternalFileName(this->DataExtent[4]);
440 vtkDebugMacro(<< "Adding file " << this->InternalFileName);
441 this->AddInternalFileName(this->InternalFileName);
445 // Multi file loading (as given with ::SetFilePattern()):
446 for (int idx = this->DataExtent[4]; idx <= this->DataExtent[5]; ++idx)
448 this->ComputeInternalFileName(idx);
449 vtkDebugMacro(<< "Adding file " << this->InternalFileName);
450 this->AddInternalFileName(this->InternalFileName);
456 * Load all the files and set it in the InternalFileList
457 * For each file, the readability and the coherence of image caracteristics
458 * are tested. If an image doesn't agree the required specifications, it
459 * isn't considered and no data will be set for the planes corresponding
462 * The source of this work is the list of file name generated by the
463 * BuildFileListFromPattern method
465 void vtkGdcmReader::LoadFileInformation()
467 GDCM_NAME_SPACE::File *file;
468 bool foundReference=false;
472 for (std::list<std::string>::iterator filename = InternalFileNameList.begin();
473 filename != InternalFileNameList.end();
476 // check for file readability
478 fp = fopen(filename->c_str(),"rb");
481 vtkErrorMacro(<< "Unable to open file " << filename->c_str());
482 vtkErrorMacro(<< "Removing this file from read files: "
483 << filename->c_str());
485 InternalFileList.push_back(file);
491 file=GDCM_NAME_SPACE::File::New();
492 file->SetLoadMode( LoadMode );
493 file->SetFileName(filename->c_str() );
496 // Test the Dicom file readability
497 if(!file->IsReadable())
499 vtkErrorMacro(<< "Gdcm cannot parse file " << filename->c_str());
500 vtkErrorMacro(<< "Removing this file from read files: "
501 << filename->c_str());
504 InternalFileList.push_back(file);
508 // Test the Pixel Type recognition
509 type = file->GetPixelType();
510 if ( (type != "8U") && (type != "8S")
511 && (type != "16U") && (type != "16S")
512 && (type != "32U") && (type != "32S") )
514 vtkErrorMacro(<< "Bad File Type for file " << filename->c_str() << "\n"
515 << " File type found : " << type.c_str()
516 << " (might be 8U, 8S, 16U, 16S, 32U, 32S) \n"
517 << " Removing this file from read files");
520 InternalFileList.push_back(file);
524 // Test the image informations
527 foundReference = true;
528 GetFileInformation(file);
530 vtkDebugMacro(<< "This file taken as coherence reference:"
531 << filename->c_str());
532 vtkDebugMacro(<< "Image dimensions of reference file as read from Gdcm:"
533 << this->NumColumns << " " << this->NumLines << " "
536 else if(!TestFileInformation(file))
542 InternalFileList.push_back(file);
547 * Update the file informations.
548 * This works exactly like LoadFileInformation, but the source of work
549 * is the list of coherent files
551 void vtkGdcmReader::UpdateFileInformation()
553 this->InternalFileList=*(this->CoherentFileList);
556 for(gdcmFileList::iterator it=InternalFileList.begin();
557 it!=InternalFileList.end();
562 GetFileInformation(*it);
569 * Get the informations from a file.
570 * These informations are required to specify the output image
573 void vtkGdcmReader::GetFileInformation(GDCM_NAME_SPACE::File *file)
575 // Get the image caracteristics
576 this->NumColumns = file->GetXSize();
577 this->NumLines = file->GetYSize();
578 this->NumPlanes = file->GetZSize();
580 if (CoherentFileList == 0)
581 this->TotalNumberOfPlanes = this->NumPlanes*InternalFileNameList.size();
583 this->TotalNumberOfPlanes = this->NumPlanes*CoherentFileList->size();
585 this->ImageType = file->GetPixelType();
586 this->PixelSize = file->GetPixelSize();
588 this->DataSpacing[0] = file->GetXSpacing();
589 this->DataSpacing[1] = file->GetYSpacing();
591 // Most of the file headers have NO z spacing
592 // It must be calculated from the whole GDCM_NAME_SPACE::Serie (if any)
593 // using Jolinda Smith's algoritm.
594 // see GDCM_NAME_SPACE::SerieHelper::ImagePositionPatientOrdering()
595 if (CoherentFileList == 0)
596 this->DataSpacing[2] = file->GetZSpacing();
599 // Just because OrderFileList() is a member of GDCM_NAME_SPACE::SerieHelper
600 // we need to instanciate sh.
601 GDCM_NAME_SPACE::SerieHelper *sh = GDCM_NAME_SPACE::SerieHelper::New();
602 sh->OrderFileList(CoherentFileList); // calls ImagePositionPatientOrdering()
603 this->DataSpacing[2] = sh->GetZSpacing();
607 // Get the image data caracteristics
608 if( file->HasLUT() && this->AllowLookupTable )
610 // I could raise an error is AllowLookupTable is on and HasLUT() off
611 this->NumComponents = file->GetNumberOfScalarComponentsRaw();
615 this->NumComponents = file->GetNumberOfScalarComponents(); //rgb or mono
620 * When more than one filename is specified (i.e. we expect loading
621 * a stack or volume) we need to check that the corresponding images/volumes
622 * to be loaded are coherent i.e. to make sure:
623 * - they all share the same X dimensions
624 * - they all share the same Y dimensions
625 * - they all share the same ImageType ( 8 bit signed, or unsigned...)
627 * Eventually, we emit a warning when all the files do NOT share the
628 * Z dimension, since we can still build a stack but the
629 * files are not coherent in Z, which is probably a source a trouble...
630 * When files are not readable (either the file cannot be opened or
631 * because gdcm cannot parse it), they are flagged as "GDCM_UNREADABLE".
632 * This method returns the total number of planar images to be loaded
633 * (i.e. an image represents one plane, but a volume represents many planes)
636 * Test the coherent informations of the file with the reference informations
637 * used as image caracteristics. The tested informations are :
638 * - they all share the same X dimensions
639 * - they all share the same Y dimensions
640 * - they all share the same Z dimensions
641 * - they all share the same number of components
642 * - they all share the same ImageType ( 8 bit signed, or unsigned...)
644 * \return True if the file match, False otherwise
646 bool vtkGdcmReader::TestFileInformation(GDCM_NAME_SPACE::File *file)
648 int numColumns = file->GetXSize();
649 int numLines = file->GetYSize();
650 int numPlanes = file->GetZSize();
652 unsigned int pixelSize = file->GetPixelSize();
654 if( file->HasLUT() && this->AllowLookupTable )
655 numComponents = file->GetNumberOfScalarComponentsRaw();
657 numComponents = file->GetNumberOfScalarComponents(); //rgb or mono
659 if( numColumns != this->NumColumns )
661 vtkErrorMacro(<< "File X value doesn't match with the previous ones: "
662 << file->GetFileName().c_str()
663 << ". Found " << numColumns << ", must be "
664 << this->NumColumns);
667 if( numLines != this->NumLines )
669 vtkErrorMacro(<< "File Y value doesn't match with the previous ones: "
670 << file->GetFileName().c_str()
671 << ". Found " << numLines << ", must be "
675 if( numPlanes != this->NumPlanes )
677 vtkErrorMacro(<< "File Z value doesn't match with the previous ones: "
678 << file->GetFileName().c_str()
679 << ". Found " << numPlanes << ", must be "
683 if( numComponents != this->NumComponents )
685 vtkErrorMacro(<< "File Components count doesn't match with the previous ones: "
686 << file->GetFileName().c_str()
687 << ". Found " << numComponents << ", must be "
688 << this->NumComponents);
691 if( pixelSize != this->PixelSize )
693 vtkErrorMacro(<< "File pixel size doesn't match with the previous ones: "
694 << file->GetFileName().c_str()
695 << ". Found " << pixelSize << ", must be "
703 //-----------------------------------------------------------------------------
706 * Remove all file names to the internal list of images to read.
708 void vtkGdcmReader::RemoveAllInternalFileName(void)
710 this->InternalFileNameList.clear();
714 * Adds a file name to the internal list of images to read.
716 void vtkGdcmReader::AddInternalFileName(const char *name)
718 char *LocalName = new char[strlen(name) + 1];
719 strcpy(LocalName, name);
720 this->InternalFileNameList.push_back(LocalName);
725 * Remove all file names to the internal list of images to read.
727 void vtkGdcmReader::RemoveAllInternalFile(void)
731 for(gdcmFileList::iterator it=InternalFileList.begin();
732 it!=InternalFileList.end();
738 this->InternalFileList.clear();
741 void vtkGdcmReader::IncrementProgress(const unsigned long updateProgressTarget,
742 unsigned long &updateProgressCount)
744 // Update progress related for bad files:
745 updateProgressCount += this->NumLines;
746 if (updateProgressTarget > 0)
748 if (!(updateProgressCount%updateProgressTarget))
750 this->UpdateProgress(
751 updateProgressCount/(50.0*updateProgressTarget));
757 * Loads the contents of the image/volume contained by char *fileName at
758 * the dest memory address. Returns the size of the data loaded.
760 /*void vtkGdcmReader::LoadImageInMemory(
761 std::string fileName,
763 const unsigned long updateProgressTarget,
764 unsigned long &updateProgressCount)
766 vtkDebugMacro(<< "Copying to memory image [" << fileName.c_str() << "]");
768 GDCM_NAME_SPACE::File *f;
769 f = new GDCM_NAME_SPACE::File();
770 f->SetLoadMode( LoadMode );
771 f->SetFileName( fileName.c_str() );
774 LoadImageInMemory(f,dest,
775 updateProgressTarget,
776 updateProgressCount);
781 * Loads the contents of the image/volume contained by GDCM_NAME_SPACE::File* f at
782 * the Dest memory address. Returns the size of the data loaded.
783 * \ param f File to consider. NULL if the file must be skiped
784 * \remarks Assume that if (f != NULL) then its caracteristics match
785 * with the previous ones
787 void vtkGdcmReader::LoadImageInMemory(
788 GDCM_NAME_SPACE::File *f,
790 const unsigned long updateProgressTarget,
791 unsigned long &updateProgressCount)
796 GDCM_NAME_SPACE::FileHelper *fileH = GDCM_NAME_SPACE::FileHelper::New( f );
797 fileH->SetUserFunction( UserFunction );
799 int numColumns = f->GetXSize();
800 int numLines = f->GetYSize();
801 int numPlanes = f->GetZSize();
804 if( f->HasLUT() && this->AllowLookupTable )
805 numComponents = f->GetNumberOfScalarComponentsRaw();
807 numComponents = f->GetNumberOfScalarComponents(); //rgb or mono
808 vtkDebugMacro(<< "numComponents:" << numComponents);
809 vtkDebugMacro(<< "Copying to memory image [" << f->GetFileName().c_str() << "]");
812 // If the data structure of vtk for image/volume representation
813 // were straigthforwards the following would be enough:
814 // GdcmFile.GetImageDataIntoVector((void*)Dest, size);
815 // But vtk chooses to invert the lines of an image, that is the last
816 // line comes first (for some axis related reasons?). Hence we need
817 // to load the image line by line, starting from the end.
819 int lineSize = NumComponents * numColumns * f->GetPixelSize();
820 int planeSize = lineSize * numLines;
824 if( fileH->GetFile()->HasLUT() && AllowLookupTable )
826 // to avoid bcc 5.5 w
827 /*size = */ fileH->GetImageDataSize();
828 src = (unsigned char*) fileH->GetImageDataRaw();
829 unsigned char *lut = (unsigned char*) fileH->GetLutRGBA();
831 if(!this->LookupTable)
833 this->LookupTable = vtkLookupTable::New();
836 this->LookupTable->SetNumberOfTableValues(256);
837 for (int tmp=0; tmp<256; tmp++)
839 this->LookupTable->SetTableValue(tmp,
840 (float)lut[4*tmp+0]/255.0,
841 (float)lut[4*tmp+1]/255.0,
842 (float)lut[4*tmp+2]/255.0,
845 this->LookupTable->SetRange(0,255);
846 vtkDataSetAttributes *a = this->GetOutput()->GetPointData();
847 a->GetScalars()->SetLookupTable(this->LookupTable);
852 //size = fileH->GetImageDataSize();
853 // useless - just an accessor; 'size' unused
854 src = (unsigned char*)fileH->GetImageData();
857 unsigned char *dst = dest + planeSize - lineSize;
858 for (int plane = 0; plane < numPlanes; plane++)
860 for (int line = 0; line < numLines; line++)
862 // Copy one line at proper destination:
863 memcpy((void*)dst, (void*)src, lineSize);
866 // Update progress related:
867 if (!(updateProgressCount%updateProgressTarget))
869 this->UpdateProgress(
870 updateProgressCount/(50.0*updateProgressTarget));
872 updateProgressCount++;
874 dst += 2 * planeSize;
880 //-----------------------------------------------------------------------------