-// $Header: /cvs/public/gdcm/vtk/vtkGdcmReader.cxx,v 1.5 2003/05/28 19:36:21 frog Exp $
-//CLEANME#include <vtkByteSwap.h>
-#include <stdio.h>
+// vtkGdcmReader.cxx
+//-----------------------------------------------------------------------------
+// //////////////////////////////////////////////////////////////
+// WARNING TODO CLENAME
+// Actual limitations of this code:
+//
+// /////// Redundant and unnecessary header parsing
+// In it's current state this code actually parses three times the Dicom
+// header of a file before the corresponding image gets loaded in the
+// ad-hoc vtkData !
+// Here is the process:
+// 1/ First loading happens in ExecuteInformation which in order to
+// positionate the vtk extents calls CheckFileCoherence. The purpose
+// of CheckFileCoherence is to make sure all the images in the future
+// stack are "homogenous" (same size, same representation...). This
+// can only be achieved by parsing all the Dicom headers...
+// 2/ ExecuteData is then responsible for the next two loadings:
+// 2a/ ExecuteData calls AllocateOutputData that in turn seems to
+// (indirectely call) ExecuteInformation which ends up in a second
+// header parsing
+// This is fixed by adding a test at the beginning of ExecuteInformation
+// on the modification of the object instance. If a modification have been
+// made (method Modified() ), the MTime value is increased. The fileTime
+// is compared to this new value to find a modification in the class
+// parameters
+// 2b/ the core of ExecuteData then needs gdcmFile (which in turns
+// initialises gdcmHeader in the constructor) in order to access
+// the data-image.
+//
+// Possible solution:
+// maintain a list of gdcmFiles (created by say ExecuteInformation) created
+// once and for all accross the life of vtkGdcmHeader (it would only load
+// new gdcmFile if the user changes the list). ExecuteData would then use
+// those gdcmFile and hence avoid calling the construtor:
+// - advantage: the header of the files would only be parser once.
+// - drawback: once execute information is called (i.e. on creation of
+// a vtkGdcmHeader) the gdcmFile structure is loaded in memory.
+// The average size of a gdcmHeader being of 100Ko, is one
+// loads 10 stacks of images with say 200 images each, you
+// end-up with a loss of 200Mo...
+//
+// /////// Never unallocated memory:
+// ExecuteData allocates space for the pixel data [which will get pointed
+// by the vtkPointData() through the call
+// data->GetPointData()->GetScalars()->SetVoidArray(mem, StackNumPixels, 0);]
+// This data is never "freed" neither in the destructor nor when the
+// filename list is extended, ExecuteData is called a second (or third)
+// time...
+// //////////////////////////////////////////////////////////////
+
+#include "gdcmFile.h"
+#include "gdcmHeaderHelper.h"
+#include "vtkGdcmReader.h"
+
+//#include <stdio.h>
#include <vtkObjectFactory.h>
#include <vtkImageData.h>
#include <vtkPointData.h>
-#include "vtkGdcmReader.h"
-#include "gdcm.h"
+#include <vtkLookupTable.h>
+vtkCxxRevisionMacro(vtkGdcmReader, "$Revision: 1.46 $");
+vtkStandardNewMacro(vtkGdcmReader);
+
+//-----------------------------------------------------------------------------
+// Constructor / Destructor
vtkGdcmReader::vtkGdcmReader()
{
- // Constructor
+ this->LookupTable = NULL;
+ this->AllowLookupTable = 0;
}
-//----------------------------------------------------------------------------
vtkGdcmReader::~vtkGdcmReader()
-{
- // FIXME free memory
+{
+ this->RemoveAllFileName();
+ this->InternalFileNameList.clear();
+ if(this->LookupTable)
+ this->LookupTable->Delete();
+}
+
+//-----------------------------------------------------------------------------
+// Print
+void vtkGdcmReader::PrintSelf(ostream& os, vtkIndent indent)
+{
+ vtkImageReader::PrintSelf(os,indent);
+ os << indent << "Filenames : " << endl;
+ vtkIndent nextIndent = indent.GetNextIndent();
+ for (std::list<std::string>::iterator FileName = FileNameList.begin();
+ FileName != FileNameList.end();
+ ++FileName)
+ {
+ os << nextIndent << FileName->c_str() << endl ;
+ }
}
-// Configure the output e.g. WholeExtent, spacing, origin, scalar type...
+//-----------------------------------------------------------------------------
+// Public
+/*
+ * Remove all files from the list of images to read.
+ */
+void vtkGdcmReader::RemoveAllFileName(void)
+{
+ this->FileNameList.clear();
+ this->Modified();
+}
+
+/*
+ * Adds a file name to the list of images to read.
+ */
+void vtkGdcmReader::AddFileName(const char* name)
+{
+ // We need to bypass the const pointer [since list<>.push_bash() only
+ // takes a char* (but not a const char*)] by making a local copy:
+ char * LocalName = new char[strlen(name) + 1];
+ strcpy(LocalName, name);
+ this->FileNameList.push_back(LocalName);
+ delete[] LocalName;
+ this->Modified();
+}
+
+/*
+ * Sets up a filename to be read.
+ */
+void vtkGdcmReader::SetFileName(const char *name)
+{
+ vtkImageReader2::SetFileName(name);
+ // Since we maintain a list of filenames, when building a volume,
+ // (see vtkGdcmReader::AddFileName), we additionaly need to purge
+ // this list when we manually positionate the filename.
+ vtkDebugMacro("Clearing all files given with AddFileName");
+ this->FileNameList.clear();
+ this->Modified();
+}
+
+//-----------------------------------------------------------------------------
+// Protected
+/*
+ * Configure the output e.g. WholeExtent, spacing, origin, scalar type...
+ */
void vtkGdcmReader::ExecuteInformation()
{
- //FIXME free any old memory
+ if(this->MTime>this->fileTime)
+ {
+ this->TotalNumberOfPlanes = this->CheckFileCoherence();
+ if ( this->TotalNumberOfPlanes == 0)
+ {
+ vtkErrorMacro("File set is not coherent. Exiting...");
+ return;
+ }
- // if the user has not set the extent, but has set the VOI
- // set the zaxis extent to the VOI z axis
- if (this->DataExtent[4]==0 && this->DataExtent[5] == 0 &&
- (this->DataVOI[4] || this->DataVOI[5]))
- {
- this->DataExtent[4] = this->DataVOI[4];
- this->DataExtent[5] = this->DataVOI[5];
- }
-
- this->ComputeInternalFileName(this->DataExtent[4]);
-
- // Check for file existence.
- FILE *fp;
- fp = fopen(this->InternalFileName,"rb");
- if (!fp)
- {
- vtkErrorMacro("Unable to open file " << this->InternalFileName);
- return;
- }
- fclose(fp);
-
- // Check for Gdcm parsability
- gdcmHeader GdcmHeader(this->InternalFileName);
- if (!GdcmHeader.IsReadable())
- {
- vtkErrorMacro("Gdcm cannot parse file " << this->InternalFileName);
- return;
- }
-
- int NX = GdcmHeader.GetXSize();
- int NY = GdcmHeader.GetYSize();
- int NZ = GdcmHeader.GetZSize();
- vtkDebugMacro("Image dimension as read from Gdcm:" <<
- NX << " " << NY << " " << NZ);
-
- if(NZ>1) this->SetFileDimensionality(3);
-
- // When the user has set the VOI, check it's coherence with the file content.
- if (this->DataVOI[0] || this->DataVOI[1] ||
+ // if the user has not set the extent, but has set the VOI
+ // set the z axis extent to the VOI z axis
+ if (this->DataExtent[4]==0 && this->DataExtent[5] == 0 &&
+ (this->DataVOI[4] || this->DataVOI[5]))
+ {
+ this->DataExtent[4] = this->DataVOI[4];
+ this->DataExtent[5] = this->DataVOI[5];
+ }
+
+ // When the user has set the VOI, check it's coherence with the file content.
+ if (this->DataVOI[0] || this->DataVOI[1] ||
this->DataVOI[2] || this->DataVOI[3] ||
this->DataVOI[4] || this->DataVOI[5])
- {
- if ((this->DataVOI[0] < 0) ||
- (this->DataVOI[1] >= NX) ||
- (this->DataVOI[2] < 0) ||
- (this->DataVOI[3] >= NY) ||
- (this->DataVOI[4] < 0) ||
- (this->DataVOI[5] >= NZ))
- {
- vtkWarningMacro("The requested VOI is larger than the file's ("
- << this->InternalFileName << ") extent ");
- this->DataVOI[0] = 0;
- this->DataVOI[1] = NX - 1;
- this->DataVOI[2] = 0;
- this->DataVOI[3] = NY - 1;
- this->DataVOI[4] = 0;
- this->DataVOI[5] = NZ - 1;
- }
- }
-
- // Positionate the Extent.
- this->DataExtent[0] = 0;
- this->DataExtent[1] = NX - 1;
- this->DataExtent[2] = 0;
- this->DataExtent[3] = NY - 1;
- if(this->GetFileDimensionality()==3)
- {
+ {
+ if ((this->DataVOI[0] < 0) ||
+ (this->DataVOI[1] >= this->NumColumns) ||
+ (this->DataVOI[2] < 0) ||
+ (this->DataVOI[3] >= this->NumLines) ||
+ (this->DataVOI[4] < 0) ||
+ (this->DataVOI[5] >= this->TotalNumberOfPlanes ))
+ {
+ vtkWarningMacro("The requested VOI is larger than expected extent.");
+ this->DataVOI[0] = 0;
+ this->DataVOI[1] = this->NumColumns - 1;
+ this->DataVOI[2] = 0;
+ this->DataVOI[3] = this->NumLines - 1;
+ this->DataVOI[4] = 0;
+ this->DataVOI[5] = this->TotalNumberOfPlanes - 1;
+ }
+ }
+
+ // Positionate the Extent.
+ this->DataExtent[0] = 0;
+ this->DataExtent[1] = this->NumColumns - 1;
+ this->DataExtent[2] = 0;
+ this->DataExtent[3] = this->NumLines - 1;
this->DataExtent[4] = 0;
- this->DataExtent[5] = NZ - 1;
- }
+ this->DataExtent[5] = this->TotalNumberOfPlanes - 1;
- // We don't need to positionate the Endian related stuff (by using
- // this->SetDataByteOrderToBigEndian() or SetDataByteOrderToLittleEndian()
- // since the // reading of the file is done by gdcm
-
- // But we need to set up the data type for downstream filters:
- std::string type = GdcmHeader.GetPixelType();
- if ( type == "8U" )
- {
- vtkDebugMacro("8 bits unsigned image");
- this->SetDataScalarTypeToUnsignedChar();
- }
- else if ( type == "8S" )
- {
- vtkErrorMacro("Cannot handle 8 bit signed files");
- return;
- }
- else if ( type == "16U" )
- {
- vtkDebugMacro("16 bits unsigned image");
- this->SetDataScalarTypeToUnsignedShort();
- }
- else if ( type == "16S" )
- {
- vtkDebugMacro("16 bits signed image");
- this->SetDataScalarTypeToShort();
- //vtkErrorMacro("Cannot handle 16 bit signed files");
- }
- else if ( type == "32U" )
- {
- vtkDebugMacro("32 bits unsigned image");
- vtkDebugMacro("WARNING: forced to signed int !");
- this->SetDataScalarTypeToInt();
- }
- else if ( type == "32S" )
- {
- vtkDebugMacro("32 bits signed image");
- this->SetDataScalarTypeToInt();
- }
- else
- {
- vtkErrorMacro("Bad File Type " << this->InternalFileName
- << "Type " << type.c_str());
- return;
- }
-
- vtkImageReader::ExecuteInformation();
+ // We don't need to positionate the Endian related stuff (by using
+ // this->SetDataByteOrderToBigEndian() or SetDataByteOrderToLittleEndian()
+ // since the reading of the file is done by gdcm.
+ // But we do need to set up the data type for downstream filters:
+ if ( ImageType == "8U" )
+ {
+ vtkDebugMacro("8 bits unsigned image");
+ this->SetDataScalarTypeToUnsignedChar();
+ }
+ else if ( ImageType == "8S" )
+ {
+ vtkErrorMacro("Cannot handle 8 bit signed files");
+ return;
+ }
+ else if ( ImageType == "16U" )
+ {
+ vtkDebugMacro("16 bits unsigned image");
+ this->SetDataScalarTypeToUnsignedShort();
+ }
+ else if ( ImageType == "16S" )
+ {
+ vtkDebugMacro("16 bits signed image");
+ this->SetDataScalarTypeToShort();
+ //vtkErrorMacro("Cannot handle 16 bit signed files");
+ }
+ else if ( ImageType == "32U" )
+ {
+ vtkDebugMacro("32 bits unsigned image");
+ vtkDebugMacro("WARNING: forced to signed int !");
+ this->SetDataScalarTypeToInt();
+ }
+ else if ( ImageType == "32S" )
+ {
+ vtkDebugMacro("32 bits signed image");
+ this->SetDataScalarTypeToInt();
+ }
+ else if ( ImageType == "FD" )
+ {
+ vtkDebugMacro("64 bits Double image");
+ this->SetDataScalarTypeToDouble();
+ }
+ //Set number of scalar components:
+ this->SetNumberOfScalarComponents(this->NumComponents);
+
+ this->fileTime=this->MTime;
+ }
+
+ this->Superclass::ExecuteInformation();
}
-// Update -> UpdateData -> Execute -> ExecuteData (see vtkSource.cxx for
-// last step.
-// This function (redefinition of vtkImageReader::ExecuteData, see
-// VTK/IO/vtkImageReader.cxx) reads a data from a file. The datas
-// extent/axes are assumed to be the
-// same as the file extent/order.
+/*
+ * Update => ouput->Update => UpdateData => Execute => ExecuteData
+ * (see vtkSource.cxx for last step).
+ * This function (redefinition of vtkImageReader::ExecuteData, see
+ * VTK/IO/vtkImageReader.cxx) reads a data from a file. The datas
+ * extent/axes are assumed to be the same as the file extent/order.
+ */
void vtkGdcmReader::ExecuteData(vtkDataObject *output)
{
- if (!this->FileName)
- {
- vtkErrorMacro("A valid FileName must be specified.");
- return;
- }
-
- vtkImageData *data = this->AllocateOutputData(output);
- data->SetExtent(this->DataExtent);
- data->GetPointData()->GetScalars()->SetName("ImageFile");
-
- // First check the coherence between the DataExtent and the
- // size of the pixel data as annouced by gdcm (looks a bit paranoid).
- gdcmFile GdcmFile(this->InternalFileName);
- int NumColumns = this->DataExtent[1] - this->DataExtent[0] + 1;
- int NumLines = this->DataExtent[3] - this->DataExtent[2] + 1;
- int NumPlanes = this->DataExtent[5] - this->DataExtent[4] + 1;
- size_t size = NumColumns * NumLines * NumPlanes * GdcmFile.GetPixelSize();
- if ( size != GdcmFile.GetImageDataSize() )
- {
- vtkDebugMacro("Inconsistency with GetImageDataSize");
- vtkDebugMacro("Number of scalar components"
- << this->NumberOfScalarComponents);
- }
- // Allocate pixel data space itself.
- unsigned char *mem = new unsigned char [size];
-
- // If the data structure of vtk for image/volume representation
- // were straigthforwards the following would suffice:
- // GdcmFile.GetImageDataIntoVector((void*)mem, size);
- // But vtk chose to invert the lines of an image, that is the last
- // line comes first (for some axis related reasons?). Hence we need
- // to load the image line by line, starting from the end:
- int LineSize = NumColumns * GdcmFile.GetPixelSize();
- unsigned char * Source = (unsigned char*)GdcmFile.GetImageData();
- unsigned char * Destination = mem + size - LineSize;
- for (int i = 0; i < NumLines; i++)
- {
- memcpy((void*)Destination, (void*)Source, LineSize);
- Source += LineSize;
- Destination -= LineSize;
- }
- // The "size" of the vtkScalars data is expressed in number of points,
- // and is not the memory size representing those points:
- size = size / GdcmFile.GetPixelSize();
- data->GetPointData()->GetScalars()->SetVoidArray(mem, size, 0);
- this->Modified();
+ if (this->InternalFileNameList.empty())
+ {
+ vtkErrorMacro("A least a valid FileName must be specified.");
+ return;
+ }
+
+ // FIXME : extraneous parsing of header is made when allocating OuputData
+ vtkImageData *data = this->AllocateOutputData(output);
+ data->SetExtent(this->DataExtent);
+ data->GetPointData()->GetScalars()->SetName("DicomImage-Volume");
+
+ // Test if output has valid extent
+ // Prevent memory errors
+ if((this->DataExtent[1]-this->DataExtent[0]>=0) &&
+ (this->DataExtent[3]-this->DataExtent[2]>=0) &&
+ (this->DataExtent[5]-this->DataExtent[4]>=0))
+ {
+ // The memory size for a full stack of images of course depends
+ // on the number of planes and the size of each image:
+ //size_t StackNumPixels = this->NumColumns * this->NumLines
+ // * this->TotalNumberOfPlanes * this->NumComponents;
+ //size_t stack_size = StackNumPixels * this->PixelSize; //not used
+ // Allocate pixel data space itself.
+ // Variables for the UpdateProgress. We shall use 50 steps to signify
+ // the advance of the process:
+ unsigned long UpdateProgressTarget = (unsigned long) ceil (this->NumLines
+ * this->TotalNumberOfPlanes
+ / 50.0);
+ // The actual advance measure:
+ unsigned long UpdateProgressCount = 0;
+
+ // Feeling the allocated memory space with each image/volume:
+ unsigned char *Dest = (unsigned char *)data->GetPointData()->GetScalars()->GetVoidPointer(0);
+ for (std::list<std::string>::iterator FileName = InternalFileNameList.begin();
+ FileName != InternalFileNameList.end();
+ ++FileName)
+ {
+ // Images that were tagged as unreadable in CheckFileCoherence()
+ // are substituted with a black image to let the caller visually
+ // notice something wrong is going on:
+ if (*FileName != "GDCM_UNREADABLE")
+ {
+ // Update progress related for good files is made in LoadImageInMemory
+ Dest += this->LoadImageInMemory(*FileName, Dest,
+ UpdateProgressTarget,
+ UpdateProgressCount);
+ }
+ else
+ {
+ // We insert a black image in the stack for the user to be aware that
+ // this image/volume couldn't be loaded. We simply skip one image
+ // size:
+ Dest += this->NumColumns * this->NumLines * this->PixelSize;
+
+ // Update progress related for bad files:
+ UpdateProgressCount += this->NumLines;
+ if (UpdateProgressTarget > 0)
+ {
+ if (!(UpdateProgressCount%UpdateProgressTarget))
+ {
+ this->UpdateProgress(UpdateProgressCount/(50.0*UpdateProgressTarget));
+ }
+ }
+ } // Else, file not loadable
+ } // Loop on files
+ }
}
-void vtkGdcmReader::PrintSelf(ostream& os, vtkIndent indent)
+/*
+ * vtkGdcmReader can have the file names specified through two ways:
+ * (1) by calling the vtkImageReader2::SetFileName(), SetFilePrefix() and
+ * SetFilePattern()
+ * (2) By successive calls to vtkGdcmReader::AddFileName()
+ * When the first method was used by caller we need to update the local
+ * filename list
+ */
+void vtkGdcmReader::BuildFileListFromPattern()
{
- vtkImageReader::PrintSelf(os,indent);
- //CLEANME os << indent << "TypeSize: " << this->TypeSize << "\n";
+ this->RemoveAllInternalFileName();
+
+ if ((! this->FileNameList.empty()) && this->FileName )
+ {
+ vtkErrorMacro("Both AddFileName and SetFileName schemes were used");
+ vtkErrorMacro("No images loaded ! ");
+ return;
+ }
+
+ if ((! this->FileNameList.empty()) && this->FilePrefix )
+ {
+ vtkErrorMacro("Both AddFileName and SetFilePrefix schemes were used");
+ vtkErrorMacro("No images loaded ! ");
+ return;
+ }
+
+ if (this->FileName && this->FilePrefix)
+ {
+ vtkErrorMacro("Both SetFileName and SetFilePrefix schemes were used");
+ vtkErrorMacro("No images loaded ! ");
+ return;
+ }
+
+ if (! this->FileNameList.empty() )
+ {
+ vtkDebugMacro("Using the AddFileName specified files");
+ this->InternalFileNameList=this->FileNameList;
+ return;
+ }
+
+ if (!this->FileName && !this->FilePrefix)
+ {
+ vtkErrorMacro("FileNames are not set. Either use AddFileName() or");
+ vtkErrorMacro("specify a FileName or FilePrefix.");
+ return;
+ }
+
+ if( this->FileName )
+ {
+ // Single file loading (as given with ::SetFileName()):
+ // Case of multi-frame file considered here
+ this->ComputeInternalFileName(this->DataExtent[4]);
+ vtkDebugMacro("Adding file " << this->InternalFileName);
+ this->AddInternalFileName(this->InternalFileName);
+ }
+ else
+ {
+ // Multi file loading (as given with ::SetFilePattern()):
+ for (int idx = this->DataExtent[4]; idx <= this->DataExtent[5]; ++idx)
+ {
+ this->ComputeInternalFileName(idx);
+ vtkDebugMacro("Adding file " << this->InternalFileName);
+ this->AddInternalFileName(this->InternalFileName);
+ }
+ }
}
+
+/*
+ * When more than one filename is specified (i.e. we expect loading
+ * a stack or volume) we need to check that the corresponding images/volumes
+ * to be loaded are coherent i.e. to make sure:
+ * - they all share the same X dimensions
+ * - they all share the same Y dimensions
+ * - they all share the same ImageType ( 8 bit signed, or unsigned...)
+ *
+ * Eventually, we emit a warning when all the files do NOT share the
+ * Z dimension, since we can still build a stack but the
+ * files are not coherent in Z, which is probably a source a trouble...
+ * When files are not readable (either the file cannot be opened or
+ * because gdcm cannot parse it), they are flagged as "GDCM_UNREADABLE".
+ * This method returns the total number of planar images to be loaded
+ * (i.e. an image represents one plane, but a volume represents many planes)
+ */
+int vtkGdcmReader::CheckFileCoherence()
+{
+ int ReturnedTotalNumberOfPlanes = 0; // The returned value.
+
+ this->BuildFileListFromPattern();
+ if (this->InternalFileNameList.empty())
+ {
+ vtkErrorMacro("FileNames are not set.");
+ return 0;
+ }
+
+ bool FoundReferenceFile = false;
+ int ReferenceNZ = 0;
+
+ // Loop on the filenames:
+ // - check for their existence and gdcm "parsability"
+ // - get the coherence check done:
+ for (std::list<std::string>::iterator FileName = InternalFileNameList.begin();
+ FileName != InternalFileNameList.end();
+ ++FileName)
+ {
+ // The file is always added in the number of planes
+ // - If file doesn't exist, it will be replaced by a black plane in the
+ // ExecuteData method
+ // - If file has more than 1 plane, other planes will be added later to
+ // to the ReturnedTotalNumberOfPlanes variable counter
+ ReturnedTotalNumberOfPlanes += 1;
+
+ /////// Stage 0: check for file name:
+ if(*FileName==std::string("GDCM_UNREADABLE"))
+ continue;
+
+ /////// Stage 1: check for file readability:
+ // Stage 1.1: check for file existence.
+ FILE *fp;
+ fp = fopen(FileName->c_str(),"rb");
+ if (!fp)
+ {
+ vtkErrorMacro("Unable to open file " << FileName->c_str());
+ vtkErrorMacro("Removing this file from readed files "
+ << FileName->c_str());
+ *FileName = "GDCM_UNREADABLE";
+ continue;
+ }
+ fclose(fp);
+
+ // Stage 1.2: check for Gdcm parsability
+ gdcmHeader GdcmHeader(FileName->c_str(), false, true);
+ // true : for enableSequences
+ if (!GdcmHeader.IsReadable())
+ {
+ vtkErrorMacro("Gdcm cannot parse file " << FileName->c_str());
+ vtkErrorMacro("Removing this file from readed files "
+ << FileName->c_str());
+ *FileName = "GDCM_UNREADABLE";
+ continue;
+ }
+
+ // Stage 1.3: further gdcm compatibility on PixelType
+ std::string type = GdcmHeader.GetPixelType();
+ if ( (type != "8U") && (type != "8S")
+ && (type != "16U") && (type != "16S")
+ && (type != "32U") && (type != "32S") )
+ {
+ vtkErrorMacro("Bad File Type for file" << FileName->c_str());
+ vtkErrorMacro(" " << type.c_str());
+ vtkErrorMacro("Removing this file from readed files "
+ << FileName->c_str());
+ *FileName = "GDCM_UNREADABLE";
+ continue;
+ }
+
+ // Stage 2: check coherence of the set of files
+ int NX = GdcmHeader.GetXSize();
+ int NY = GdcmHeader.GetYSize();
+ int NZ = GdcmHeader.GetZSize();
+ if (FoundReferenceFile)
+ {
+ // Stage 2.1: mandatory coherence stage:
+ if ( ( NX != this->NumColumns )
+ || ( NY != this->NumLines )
+ || ( type != this->ImageType ) )
+ {
+ vtkErrorMacro("This file is not coherent with previous ones"
+ << FileName->c_str());
+ vtkErrorMacro("Removing this file from readed files "
+ << FileName->c_str());
+ *FileName = "GDCM_UNREADABLE";
+ continue;
+ }
+
+ // Stage 2.2: optional coherence stage
+ if ( NZ != ReferenceNZ )
+ {
+ vtkErrorMacro("File is not coherent in Z with previous ones"
+ << FileName->c_str());
+ }
+ else
+ {
+ vtkDebugMacro("File is coherent with previous ones"
+ << FileName->c_str());
+ }
+
+ // Stage 2.3: when the file contains a volume (as opposed to an image),
+ // notify the caller.
+ if (NZ > 1)
+ {
+ vtkErrorMacro("This file contains multiple planes (images)"
+ << FileName->c_str());
+ }
+
+ // Eventually, this file can be added on the stack. Update the
+ // full size of the stack
+ vtkDebugMacro("Number of planes added to the stack: " << NZ);
+ ReturnedTotalNumberOfPlanes += NZ - 1; // First plane already added
+ continue;
+
+ }
+ else
+ {
+ // We didn't have a workable reference file yet. Set this one
+ // as the reference.
+ FoundReferenceFile = true;
+ vtkDebugMacro("This file taken as coherence reference:"
+ << FileName->c_str());
+ vtkDebugMacro("Image dimension of reference file as read from Gdcm:"
+ << NX << " " << NY << " " << NZ);
+ vtkDebugMacro("Number of planes added to the stack: " << NZ);
+ // Set aside the size of the image
+ this->NumColumns = NX;
+ this->NumLines = NY;
+ ReferenceNZ = NZ;
+ ReturnedTotalNumberOfPlanes += NZ - 1; // First plane already added
+ this->ImageType = type;
+ this->PixelSize = GdcmHeader.GetPixelSize();
+
+ if( GdcmHeader.HasLUT() && this->AllowLookupTable )
+ {
+ // I could raise an error is AllowLookupTable is on and HasLUT() off
+ this->NumComponents = GdcmHeader.GetNumberOfScalarComponentsRaw();
+ }
+ else
+ {
+ this->NumComponents = GdcmHeader.GetNumberOfScalarComponents(); //rgb or mono
+ }
+
+ //Set image spacing
+ this->DataSpacing[0] = GdcmHeader.GetXSpacing();
+ this->DataSpacing[1] = GdcmHeader.GetYSpacing();
+ this->DataSpacing[2] = GdcmHeader.GetZSpacing();
+
+ //Set image origin
+ this->DataOrigin[0] = GdcmHeader.GetXOrigin();
+ this->DataOrigin[1] = GdcmHeader.GetYOrigin();
+ this->DataOrigin[2] = GdcmHeader.GetZOrigin();
+
+ }
+ } // End of loop on FileName
+
+ ///////// The files we CANNOT load are flaged. On debugging purposes
+ // count the loadable number of files and display their number:
+ int NumberCoherentFiles = 0;
+ for (std::list<std::string>::iterator Filename = InternalFileNameList.begin();
+ Filename != InternalFileNameList.end();
+ ++Filename)
+ {
+ if (*Filename != "GDCM_UNREADABLE")
+ NumberCoherentFiles++;
+ }
+ vtkDebugMacro("Number of coherent files: " << NumberCoherentFiles);
+
+ if (ReturnedTotalNumberOfPlanes == 0)
+ {
+ vtkErrorMacro("No loadable file.");
+ }
+
+ vtkDebugMacro("Total number of planes on the stack: "
+ << ReturnedTotalNumberOfPlanes);
+
+ return ReturnedTotalNumberOfPlanes;
+}
+
+//-----------------------------------------------------------------------------
+// Private
+/*
+ * Remove all file names to the internal list of images to read.
+ */
+void vtkGdcmReader::RemoveAllInternalFileName(void)
+{
+ this->InternalFileNameList.clear();
+}
+
+/*
+ * Adds a file name to the internal list of images to read.
+ */
+void vtkGdcmReader::AddInternalFileName(const char* name)
+{
+ char * LocalName = new char[strlen(name) + 1];
+ strcpy(LocalName, name);
+ this->InternalFileNameList.push_back(LocalName);
+ delete[] LocalName;
+}
+
+/*
+ * Loads the contents of the image/volume contained by Filename at
+ * the Dest memory address. Returns the size of the data loaded.
+ */
+size_t vtkGdcmReader::LoadImageInMemory(
+ std::string FileName,
+ unsigned char * Dest,
+ const unsigned long UpdateProgressTarget,
+ unsigned long & UpdateProgressCount)
+{
+ vtkDebugMacro("Copying to memory image [" << FileName.c_str() << "]");
+ gdcmFile GdcmFile(FileName.c_str(),false,true);
+ // true : to enable SeQuences
+ size_t size;
+
+ // If the data structure of vtk for image/volume representation
+ // were straigthforwards the following would be enough:
+ // GdcmFile.GetImageDataIntoVector((void*)Dest, size);
+ // But vtk chooses to invert the lines of an image, that is the last
+ // line comes first (for some axis related reasons?). Hence we need
+ // to load the image line by line, starting from the end.
+
+ int NumColumns = GdcmFile.GetHeader()->GetXSize();
+ int NumLines = GdcmFile.GetHeader()->GetYSize();
+ int NumPlanes = GdcmFile.GetHeader()->GetZSize();
+ int LineSize = NumComponents * NumColumns * GdcmFile.GetHeader()->GetPixelSize();
+
+ unsigned char * Source;
+
+ if( GdcmFile.GetHeader()->HasLUT() && this->AllowLookupTable )
+ {
+ size = GdcmFile.GetImageDataSizeRaw();
+ Source = (unsigned char*) GdcmFile.GetImageDataRaw();
+ unsigned char *Lut = GdcmFile.GetHeader()->GetLUTRGBA();
+
+ if(!this->LookupTable)
+ this->LookupTable = vtkLookupTable::New();
+
+ this->LookupTable->SetNumberOfTableValues(256);
+ for (int tmp=0; tmp<256; tmp++)
+ {
+ this->LookupTable->SetTableValue(tmp,
+ (float)Lut[4*tmp+0]/255.0,
+ (float)Lut[4*tmp+1]/255.0,
+ (float)Lut[4*tmp+2]/255.0,
+ 1);
+ }
+ this->LookupTable->SetRange(0,255);
+ vtkDataSetAttributes *a=this->GetOutput()->GetPointData();
+ a->GetScalars()->SetLookupTable(this->LookupTable);
+ free(Lut);
+ }
+ else
+ {
+ size = GdcmFile.GetImageDataSize();
+ Source = (unsigned char*)GdcmFile.GetImageData();
+ }
+
+ unsigned char * pSource = Source; //pointer for later deletion
+ unsigned char * Destination = Dest + size - LineSize;
+
+ for (int plane = 0; plane < NumPlanes; plane++)
+ {
+ for (int line = 0; line < NumLines; line++)
+ {
+ // Copy one line at proper destination:
+ memcpy((void*)Destination, (void*)Source, LineSize);
+ Source += LineSize;
+ Destination -= LineSize;
+ // Update progress related:
+ if (!(UpdateProgressCount%UpdateProgressTarget))
+ {
+ this->UpdateProgress(UpdateProgressCount/(50.0*UpdateProgressTarget));
+ }
+ UpdateProgressCount++;
+ }
+ }
+
+// DO NOT remove this commented out code .
+// Nobody knows what's expecting you ...
+// Just to 'see' what was actually read on disk :-(
+
+// FILE * f2;
+// f2 = fopen("SpuriousFile.RAW","wb");
+// fwrite(Dest,size,1,f2);
+// fclose(f2);
+
+ //GetImageData allocate a (void*)malloc, remove it:
+ delete[] pSource;
+ return size;
+}
+
+//-----------------------------------------------------------------------------
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff