+ }
+
+ // 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
+ }
+}
+
+/*
+ * 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()
+{
+ 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);
+ }
+ }