1 /*=========================================================================
4 Module: $RCSfile: vtkGdcmReader.cxx,v $
6 Date: $Date: 2009/11/03 14:05:23 $
7 Version: $Revision: 1.96 $
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 file 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: 1.96 $")
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
115 this->KeepOverlays = false;
117 this->FlipY = true; // to keep old behaviour
120 vtkGdcmReader::~vtkGdcmReader()
122 this->RemoveAllFileName();
123 this->InternalFileNameList.clear();
124 if(this->LookupTable)
125 this->LookupTable->Delete();
128 //-----------------------------------------------------------------------------
130 void vtkGdcmReader::PrintSelf(ostream &os, vtkIndent indent)
132 this->Superclass::PrintSelf(os,indent);
133 os << indent << "Filenames : " << endl;
134 vtkIndent nextIndent = indent.GetNextIndent();
135 for (std::list<std::string>::iterator it = FileNameList.begin();
136 it != FileNameList.end();
139 os << nextIndent << it->c_str() << endl ;
143 //-----------------------------------------------------------------------------
146 * Remove all files from the list of images to read.
148 void vtkGdcmReader::RemoveAllFileName(void)
150 this->FileNameList.clear();
155 * Adds a file name to the list of images to read.
157 void vtkGdcmReader::AddFileName(const char* name)
159 // We need to bypass the const pointer [since list<>.push_bash() only
160 // takes a char* (but not a const char*)] by making a local copy:
161 this->FileNameList.push_back(name);
166 * Sets up a filename to be read.
168 void vtkGdcmReader::SetFileName(const char *name)
170 vtkImageReader2::SetFileName(name);
171 // Since we maintain a list of filenames, when building a volume,
172 // (see vtkGdcmReader::AddFileName), we additionaly need to purge
173 // this list when we manually positionate the filename.
174 vtkDebugMacro(<< "Clearing all files given with AddFileName");
175 this->FileNameList.clear();
179 //-----------------------------------------------------------------------------
182 * Configure the output e.g. WholeExtent, spacing, origin, scalar type...
184 void vtkGdcmReader::ExecuteInformation()
186 // if(this->Execution) // For VTK5.0
189 // this->Execution=true; // end For VTK5.0
190 this->RemoveAllInternalFile();
191 if(this->MTime>this->fileTime)
193 this->TotalNumberOfPlanes = 0;
195 if ( this->CoherentFileList != 0 )
197 this->UpdateFileInformation();
201 this->BuildFileListFromPattern();
202 this->LoadFileInformation();
205 if ( this->TotalNumberOfPlanes == 0)
207 vtkErrorMacro(<< "File set is not coherent. Exiting...");
211 // if the user has not set the extent, but has set the VOI
212 // set the z axis extent to the VOI z axis
213 if (this->DataExtent[4]==0 && this->DataExtent[5] == 0 &&
214 (this->DataVOI[4] || this->DataVOI[5]))
216 this->DataExtent[4] = this->DataVOI[4];
217 this->DataExtent[5] = this->DataVOI[5];
220 // When the user has set the VOI, check it's coherence with the file content.
221 if (this->DataVOI[0] || this->DataVOI[1] ||
222 this->DataVOI[2] || this->DataVOI[3] ||
223 this->DataVOI[4] || this->DataVOI[5])
225 if ((this->DataVOI[0] < 0) ||
226 (this->DataVOI[1] >= this->NumColumns) ||
227 (this->DataVOI[2] < 0) ||
228 (this->DataVOI[3] >= this->NumLines) ||
229 (this->DataVOI[4] < 0) ||
230 (this->DataVOI[5] >= this->TotalNumberOfPlanes ))
232 vtkWarningMacro(<< "The requested VOI is larger than expected extent.");
233 this->DataVOI[0] = 0;
234 this->DataVOI[1] = this->NumColumns - 1;
235 this->DataVOI[2] = 0;
236 this->DataVOI[3] = this->NumLines - 1;
237 this->DataVOI[4] = 0;
238 this->DataVOI[5] = this->TotalNumberOfPlanes - 1;
243 this->DataExtent[0] = 0;
244 this->DataExtent[1] = this->NumColumns - 1;
245 this->DataExtent[2] = 0;
246 this->DataExtent[3] = this->NumLines - 1;
247 this->DataExtent[4] = 0;
248 this->DataExtent[5] = this->TotalNumberOfPlanes - 1;
250 // We don't need to set the Endian related stuff (by using
251 // this->SetDataByteOrderToBigEndian() or SetDataByteOrderToLittleEndian()
252 // since the reading of the file is done by gdcm.
253 // But we do need to set up the data type for downstream filters:
254 if ( ImageType == "8U" )
256 vtkDebugMacro(<< "8 bits unsigned image");
257 this->SetDataScalarTypeToUnsignedChar();
259 else if ( ImageType == "8S" )
261 vtkErrorMacro(<< "Cannot handle 8 bit signed files");
264 else if ( ImageType == "16U" )
266 vtkDebugMacro(<< "16 bits unsigned image");
267 this->SetDataScalarTypeToUnsignedShort();
269 else if ( ImageType == "16S" )
271 vtkDebugMacro(<< "16 bits signed image");
272 this->SetDataScalarTypeToShort();
274 else if ( ImageType == "32U" )
276 vtkDebugMacro(<< "32 bits unsigned image");
277 vtkDebugMacro(<< "WARNING: forced to signed int !");
278 this->SetDataScalarTypeToInt();
280 else if ( ImageType == "32S" )
282 vtkDebugMacro(<< "32 bits signed image");
283 this->SetDataScalarTypeToInt();
285 else if ( ImageType == "FD" ) // This is not genuine DICOM, but so usefull
287 vtkDebugMacro(<< "64 bits Double image");
288 this->SetDataScalarTypeToDouble();
290 //Set number of scalar components:
291 this->SetNumberOfScalarComponents(this->NumComponents);
293 this->fileTime=this->MTime;
296 this->Superclass::ExecuteInformation();
298 //this->GetOutput()->SetUpdateExtentToWholeExtent();// For VTK5.0
299 //this->BuildData(this->GetOutput());
301 //this->Execution=false;
302 //this->RemoveAllInternalFile(); // End For VTK5.0
306 * Update => ouput->Update => UpdateData => Execute => ExecuteData
307 * (see vtkSource.cxx for last step).
308 * This function (redefinition of vtkImageReader::ExecuteData, see
309 * VTK/IO/vtkImageReader.cxx) reads a data from a file. The data
310 * extent/axes are assumed to be the same as the file extent/order.
312 void vtkGdcmReader::ExecuteData(vtkDataObject *output)
314 vtkImageData *data=vtkImageData::SafeDownCast(output);
315 data->SetExtent(this->DataExtent);
317 /* if ( CoherentFileList != 0 ) // When a list of names is passed
319 if (this->CoherentFileList->empty())
321 vtkErrorMacro(<< "Coherent File List must have at least a valid File*.");
325 else if (this->InternalFileNameList.empty())
327 vtkErrorMacro(<< "A least a valid FileName must be specified.");
332 // data->AllocateScalars(); // For VTK5.0
333 // if (this->UpdateExtentIsEmpty(output))
337 //} // end For VTK5.0
339 data->AllocateScalars(); // For VTK5.0
341 #if (VTK_MAJOR_VERSION >= 5) || ( VTK_MAJOR_VERSION == 4 && VTK_MINOR_VERSION > 2 )
342 //#if (VTK_MAJOR_VERSION >= 5)
343 if (this->UpdateExtentIsEmpty(output))
349 data->GetPointData()->GetScalars()->SetName("DicomImage-Volume");
351 // Test if output has valid extent
352 // Prevent memory errors
353 if((this->DataExtent[1]-this->DataExtent[0]>=0) &&
354 (this->DataExtent[3]-this->DataExtent[2]>=0) &&
355 (this->DataExtent[5]-this->DataExtent[4]>=0))
357 // The memory size for a full stack of images of course depends
358 // on the number of planes and the size of each image:
359 //size_t StackNumPixels = this->NumColumns * this->NumLines
360 // * this->TotalNumberOfPlanes * this->NumComponents;
361 //size_t stack_size = StackNumPixels * this->PixelSize; //not used
362 // Allocate pixel data space itself.
364 // Variables for the UpdateProgress. We shall use 50 steps to signify
365 // the advance of the process:
366 unsigned long UpdateProgressTarget = (unsigned long) ceil (this->NumLines
367 * this->TotalNumberOfPlanes
369 // The actual advance measure:
370 unsigned long UpdateProgressCount = 0;
372 // Filling the allocated memory space with each image/volume:
374 size_t size = this->NumColumns * this->NumLines * this->NumPlanes
375 * data->GetScalarSize() * this->NumComponents;
376 unsigned char *Dest = (unsigned char *)data->GetScalarPointer();
377 for (std::vector<GDCM_NAME_SPACE::File* >::iterator it = InternalFileList.begin();
378 it != InternalFileList.end();
381 this->LoadImageInMemory(*it, Dest,
382 UpdateProgressTarget,
383 UpdateProgressCount);
387 this->RemoveAllInternalFile(); // For VTK5.0
391 * vtkGdcmReader can have the file names specified through two ways:
392 * (1) by calling the vtkImageReader2::SetFileName(), SetFilePrefix() and
394 * (2) By successive calls to vtkGdcmReader::AddFileName()
395 * When the first method was used by caller we need to update the local
398 void vtkGdcmReader::BuildFileListFromPattern()
400 this->RemoveAllInternalFileName();
402 // Test miscellanous cases
403 if ((! this->FileNameList.empty()) && this->FileName )
405 vtkErrorMacro(<< "Both AddFileName and SetFileName schemes were used");
406 vtkErrorMacro(<< "No images loaded ! ");
410 if ((! this->FileNameList.empty()) && this->FilePrefix )
412 vtkErrorMacro(<< "Both AddFileName and SetFilePrefix schemes were used");
413 vtkErrorMacro(<< "No images loaded ! ");
417 if (this->FileName && this->FilePrefix)
419 vtkErrorMacro(<< "Both SetFileName and SetFilePrefix schemes were used");
420 vtkErrorMacro(<< "No images loaded ! ");
424 // Create the InternalFileNameList
425 if (! this->FileNameList.empty() )
427 vtkDebugMacro(<< "Using the AddFileName specified files");
428 this->InternalFileNameList=this->FileNameList;
432 if (!this->FileName && !this->FilePrefix)
434 vtkErrorMacro(<< "FileNames are not set. Either use AddFileName() or");
435 vtkErrorMacro(<< "specify a FileName or FilePrefix.");
441 // Single file loading (as given with ::SetFileName()):
442 // Case of multi-frame file considered here
443 this->ComputeInternalFileName(this->DataExtent[4]);
444 vtkDebugMacro(<< "Adding file " << this->InternalFileName);
445 this->AddInternalFileName(this->InternalFileName);
449 // Multi file loading (as given with ::SetFilePattern()):
450 for (int idx = this->DataExtent[4]; idx <= this->DataExtent[5]; ++idx)
452 this->ComputeInternalFileName(idx);
453 vtkDebugMacro(<< "Adding file " << this->InternalFileName);
454 this->AddInternalFileName(this->InternalFileName);
460 * Load all the files and set it in the InternalFileList
461 * For each file, the readability and the coherence of image caracteristics
462 * are tested. If an image doesn't agree the required specifications, it
463 * isn't considered and no data will be set for the planes corresponding
466 * The source of this work is the list of file name generated by the
467 * BuildFileListFromPattern method
469 void vtkGdcmReader::LoadFileInformation()
471 GDCM_NAME_SPACE::File *file;
472 bool foundReference=false;
476 for (std::list<std::string>::iterator filename = InternalFileNameList.begin();
477 filename != InternalFileNameList.end();
480 // check for file readability
482 fp = fopen(filename->c_str(),"rb");
485 vtkErrorMacro(<< "Unable to open file " << filename->c_str());
486 vtkErrorMacro(<< "Removing this file from read files: "
487 << filename->c_str());
489 InternalFileList.push_back(file);
495 file=GDCM_NAME_SPACE::File::New();
496 file->SetLoadMode( LoadMode );
497 file->SetFileName(filename->c_str() );
500 // Test the Dicom file readability
501 if(!file->IsReadable())
503 vtkErrorMacro(<< "Gdcm cannot parse file " << filename->c_str());
504 vtkErrorMacro(<< "Removing this file from read files: "
505 << filename->c_str());
508 InternalFileList.push_back(file);
512 // Test the Pixel Type recognition
513 type = file->GetPixelType();
514 if ( (type != "8U") && (type != "8S")
515 && (type != "16U") && (type != "16S")
516 && (type != "32U") && (type != "32S")
517 && (type != "FD") ) // Not so sure this one is kosher
519 vtkErrorMacro(<< "Bad File Type for file " << filename->c_str() << "\n"
520 << " File type found : " << type.c_str()
521 << " (might be 8U, 8S, 16U, 16S, 32U, 32S, FD) \n"
522 << " Removing this file from read files");
525 InternalFileList.push_back(file);
529 // Test the image informations
532 foundReference = true;
533 GetFileInformation(file);
535 vtkDebugMacro(<< "This file taken as coherence reference:"
536 << filename->c_str());
537 vtkDebugMacro(<< "Image dimensions of reference file as read from Gdcm:"
538 << this->NumColumns << " " << this->NumLines << " "
541 else if(!TestFileInformation(file))
547 InternalFileList.push_back(file);
552 * Update the file informations.
553 * This works exactly like LoadFileInformation, but the source of work
554 * is the list of coherent files
556 void vtkGdcmReader::UpdateFileInformation()
558 this->InternalFileList=*(this->CoherentFileList);
561 for(gdcmFileList::iterator it=InternalFileList.begin();
562 it!=InternalFileList.end();
567 GetFileInformation(*it);
574 * Get the informations from a file.
575 * These informations are required to specify the output image
578 void vtkGdcmReader::GetFileInformation(GDCM_NAME_SPACE::File *file)
580 // Get the image caracteristics
581 this->NumColumns = file->GetXSize();
582 this->NumLines = file->GetYSize();
583 this->NumPlanes = file->GetZSize();
585 if (CoherentFileList == 0)
586 this->TotalNumberOfPlanes = this->NumPlanes*InternalFileNameList.size();
588 this->TotalNumberOfPlanes = this->NumPlanes*CoherentFileList->size();
590 this->ImageType = file->GetPixelType();
591 this->PixelSize = file->GetPixelSize();
593 this->DataSpacing[0] = file->GetXSpacing();
594 this->DataSpacing[1] = file->GetYSpacing();
596 // Most of the file headers have NO z spacing
597 // It must be calculated from the whole GDCM_NAME_SPACE::Serie (if any)
598 // using Jolinda Smith's algoritm.
599 // see GDCM_NAME_SPACE::SerieHelper::ImagePositionPatientOrdering()
600 if (CoherentFileList == 0)
601 this->DataSpacing[2] = file->GetZSpacing();
604 // Just because OrderFileList() is a member of GDCM_NAME_SPACE::SerieHelper
605 // we need to instanciate sh.
606 GDCM_NAME_SPACE::SerieHelper *sh = GDCM_NAME_SPACE::SerieHelper::New();
607 sh->OrderFileList(CoherentFileList); // calls ImagePositionPatientOrdering()
608 this->DataSpacing[2] = sh->GetZSpacing();
612 // Get the image data caracteristics
613 if( file->HasLUT() && this->AllowLookupTable )
615 // I could raise an error is AllowLookupTable is on and HasLUT() off
616 this->NumComponents = file->GetNumberOfScalarComponentsRaw();
620 this->NumComponents = file->GetNumberOfScalarComponents(); //rgb or mono
625 * When more than one filename is specified (i.e. we expect loading
626 * a stack or volume) we need to check that the corresponding images/volumes
627 * to be loaded are coherent i.e. to make sure:
628 * - they all share the same X dimensions
629 * - they all share the same Y dimensions
630 * - they all share the same ImageType ( 8 bit signed, or unsigned...)
632 * Eventually, we emit a warning when all the files do NOT share the
633 * Z dimension, since we can still build a stack but the
634 * files are not coherent in Z, which is probably a source a trouble...
635 * When files are not readable (either the file cannot be opened or
636 * because gdcm cannot parse it), they are flagged as "GDCM_UNREADABLE".
637 * This method returns the total number of planar images to be loaded
638 * (i.e. an image represents one plane, but a volume represents many planes)
641 * Test the coherent informations of the file with the reference informations
642 * used as image caracteristics. The tested informations are :
643 * - they all share the same X dimensions
644 * - they all share the same Y dimensions
645 * - they all share the same Z dimensions
646 * - they all share the same number of components
647 * - they all share the same ImageType ( 8 bit signed, or unsigned...)
649 * \return True if the file match, False otherwise
651 bool vtkGdcmReader::TestFileInformation(GDCM_NAME_SPACE::File *file)
653 int numColumns = file->GetXSize();
654 int numLines = file->GetYSize();
655 int numPlanes = file->GetZSize();
657 unsigned int pixelSize = file->GetPixelSize();
659 if( file->HasLUT() && this->AllowLookupTable )
660 numComponents = file->GetNumberOfScalarComponentsRaw();
662 numComponents = file->GetNumberOfScalarComponents(); //rgb or mono
664 if( numColumns != this->NumColumns )
666 vtkErrorMacro(<< "File X value doesn't match with the previous ones: "
667 << file->GetFileName().c_str()
668 << ". Found " << numColumns << ", must be "
669 << this->NumColumns);
672 if( numLines != this->NumLines )
674 vtkErrorMacro(<< "File Y value doesn't match with the previous ones: "
675 << file->GetFileName().c_str()
676 << ". Found " << numLines << ", must be "
680 if( numPlanes != this->NumPlanes )
682 vtkErrorMacro(<< "File Z value doesn't match with the previous ones: "
683 << file->GetFileName().c_str()
684 << ". Found " << numPlanes << ", must be "
688 if( numComponents != this->NumComponents )
690 vtkErrorMacro(<< "File Components count doesn't match with the previous ones: "
691 << file->GetFileName().c_str()
692 << ". Found " << numComponents << ", must be "
693 << this->NumComponents);
696 if( pixelSize != this->PixelSize )
698 vtkErrorMacro(<< "File pixel size doesn't match with the previous ones: "
699 << file->GetFileName().c_str()
700 << ". Found " << pixelSize << ", must be "
708 //-----------------------------------------------------------------------------
711 * Remove all file names to the internal list of images to read.
713 void vtkGdcmReader::RemoveAllInternalFileName(void)
715 this->InternalFileNameList.clear();
719 * Adds a file name to the internal list of images to read.
721 void vtkGdcmReader::AddInternalFileName(const char *name)
723 char *LocalName = new char[strlen(name) + 1];
724 strcpy(LocalName, name);
725 this->InternalFileNameList.push_back(LocalName);
730 * Remove all file names to the internal list of images to read.
732 void vtkGdcmReader::RemoveAllInternalFile(void)
736 for(gdcmFileList::iterator it=InternalFileList.begin();
737 it!=InternalFileList.end();
743 this->InternalFileList.clear();
746 void vtkGdcmReader::IncrementProgress(const unsigned long updateProgressTarget,
747 unsigned long &updateProgressCount)
749 // Update progress related for bad files:
750 updateProgressCount += this->NumLines;
751 if (updateProgressTarget > 0)
753 if (!(updateProgressCount%updateProgressTarget))
755 this->UpdateProgress(
756 updateProgressCount/(50.0*updateProgressTarget));
762 * Loads the contents of the image/volume contained by char *fileName at
763 * the dest memory address. Returns the size of the data loaded.
765 /*void vtkGdcmReader::LoadImageInMemory(
766 std::string fileName,
768 const unsigned long updateProgressTarget,
769 unsigned long &updateProgressCount)
771 vtkDebugMacro(<< "Copying to memory image [" << fileName.c_str() << "]");
773 GDCM_NAME_SPACE::File *f;
774 f = new GDCM_NAME_SPACE::File();
775 f->SetLoadMode( LoadMode );
776 f->SetFileName( fileName.c_str() );
779 LoadImageInMemory(f,dest,
780 updateProgressTarget,
781 updateProgressCount);
786 * Loads the contents of the image/volume contained by GDCM_NAME_SPACE::File* f at
787 * the Dest memory address. Returns the size of the data loaded.
788 * \ param f File to consider. NULL if the file must be skiped
789 * \remarks Assume that if (f != NULL) then its caracteristics match
790 * with the previous ones
792 void vtkGdcmReader::LoadImageInMemory(
793 GDCM_NAME_SPACE::File *f,
795 const unsigned long updateProgressTarget,
796 unsigned long &updateProgressCount)
801 GDCM_NAME_SPACE::FileHelper *fileH = GDCM_NAME_SPACE::FileHelper::New( f );
802 fileH->SetUserFunction( UserFunction );
804 fileH->SetKeepOverlays ( this->KeepOverlays);
806 int numColumns = f->GetXSize();
807 int numLines = f->GetYSize();
808 int numPlanes = f->GetZSize();
811 if( f->HasLUT() && this->AllowLookupTable )
812 numComponents = f->GetNumberOfScalarComponentsRaw();
814 numComponents = f->GetNumberOfScalarComponents(); //rgb or mono
815 vtkDebugMacro(<< "numComponents:" << numComponents);
816 vtkDebugMacro(<< "Copying to memory image [" << f->GetFileName().c_str() << "]");
819 // If the data structure of vtk for image/volume representation
820 // were straigthforwards the following would be enough:
821 // GdcmFile.GetImageDataIntoVector((void*)Dest, size);
822 // But vtk chooses to invert the lines of an image, that is the last
823 // line comes first (for some axis related reasons?). Hence we need
824 // to load the image line by line, starting from the end.
826 int lineSize = NumComponents * numColumns * f->GetPixelSize();
827 int planeSize = lineSize * numLines;
831 if( fileH->GetFile()->HasLUT() && AllowLookupTable )
833 // to avoid bcc 5.5 w
834 /*size = */ fileH->GetImageDataSize();
835 src = (unsigned char*) fileH->GetImageDataRaw();
836 unsigned char *lut = (unsigned char*) fileH->GetLutRGBA();
838 if(!this->LookupTable)
840 this->LookupTable = vtkLookupTable::New();
843 this->LookupTable->SetNumberOfTableValues(256);
844 for (int tmp=0; tmp<256; tmp++)
846 this->LookupTable->SetTableValue(tmp,
847 (float)lut[4*tmp+0]/255.0,
848 (float)lut[4*tmp+1]/255.0,
849 (float)lut[4*tmp+2]/255.0,
852 this->LookupTable->SetRange(0,255);
853 vtkDataSetAttributes *a = this->GetOutput()->GetPointData();
854 a->GetScalars()->SetLookupTable(this->LookupTable);
859 //size = fileH->GetImageDataSize();
860 // useless - just an accessor; 'size' unused
861 //if (this->GetFlipY())
862 src = (unsigned char*)fileH->GetImageData();
864 // very strange, but it doesn't work (I have to memcpy the pixels ?!?)
865 // dest = (unsigned char*)fileH->GetImageData();
868 if (this->GetFlipY()) {
869 unsigned char *dst = dest + planeSize - lineSize;
870 for (int plane = 0; plane < numPlanes; plane++)
872 for (int line = 0; line < numLines; line++)
874 // Copy one line at proper destination:
875 memcpy((void*)dst, (void*)src, lineSize);
878 // Update progress related:
879 if (!(updateProgressCount%updateProgressTarget))
881 this->UpdateProgress(
882 updateProgressCount/(50.0*updateProgressTarget));
884 updateProgressCount++;
886 dst += 2 * planeSize;
889 else // we don't flip (upside down) the image
891 memcpy((void*)dest, (void*)src, numPlanes * numLines * lineSize);
896 //-----------------------------------------------------------------------------