+ this->RemoveAllInternalFileName();
+
+ // Test miscellanous cases
+ 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;
+ }
+
+ // Create the InternalFileNameList
+ 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);
+ }
+ }
+}
+
+/**
+ * Load all the files and set it in the InternalFileList
+ * For each file, the readability and the coherence of image caracteristics
+ * are tested. If an image doesn't agree the required specifications, it
+ * isn't considered and no data will be set for the planes corresponding
+ * to this image
+ *
+ * The source of this work is the list of file name generated by the
+ * BuildFileListFromPattern method
+ */
+void vtkGdcmReader::LoadFileInformation()
+{
+ GDCM_NAME_SPACE::File *file;
+ bool foundReference=false;
+ std::string type;
+
+ this->OwnFile=true;
+ for (std::list<std::string>::iterator filename = InternalFileNameList.begin();
+ filename != InternalFileNameList.end();
+ ++filename)
+ {
+ // check for file readability
+ FILE *fp;
+ fp = fopen(filename->c_str(),"rb");
+ if (!fp)
+ {
+ vtkErrorMacro(<< "Unable to open file " << filename->c_str());
+ vtkErrorMacro(<< "Removing this file from read files: "
+ << filename->c_str());
+ file = NULL;
+ InternalFileList.push_back(file);
+ continue;
+ }
+ fclose(fp);
+
+ // Read the file
+ file=GDCM_NAME_SPACE::File::New();
+ file->SetLoadMode( LoadMode );
+ file->SetFileName(filename->c_str() );
+ file->Load();
+
+ // Test the Dicom file readability
+ if(!file->IsReadable())
+ {
+ vtkErrorMacro(<< "Gdcm cannot parse file " << filename->c_str());
+ vtkErrorMacro(<< "Removing this file from read files: "
+ << filename->c_str());
+ file->Delete();
+ file=NULL;
+ InternalFileList.push_back(file);
+ continue;
+ }
+
+ // Test the Pixel Type recognition
+ type = file->GetPixelType();
+ if ( (type != "8U") && (type != "8S")
+ && (type != "16U") && (type != "16S")
+ && (type != "32U") && (type != "32S") )
+ {
+ vtkErrorMacro(<< "Bad File Type for file " << filename->c_str() << "\n"
+ << " File type found : " << type.c_str()
+ << " (might be 8U, 8S, 16U, 16S, 32U, 32S) \n"
+ << " Removing this file from read files");
+ file->Delete();
+ file=NULL;
+ InternalFileList.push_back(file);
+ continue;
+ }
+
+ // Test the image informations
+ if(!foundReference)
+ {
+ foundReference = true;
+ GetFileInformation(file);
+
+ vtkDebugMacro(<< "This file taken as coherence reference:"
+ << filename->c_str());
+ vtkDebugMacro(<< "Image dimensions of reference file as read from Gdcm:"
+ << this->NumColumns << " " << this->NumLines << " "
+ << this->NumPlanes);
+ }
+ else if(!TestFileInformation(file))
+ {
+ file->Delete();
+ file=NULL;
+ }
+
+ InternalFileList.push_back(file);
+ }
+}
+
+/**
+ * Update the file informations.
+ * This works exactly like LoadFileInformation, but the source of work
+ * is the list of coherent files
+ */
+void vtkGdcmReader::UpdateFileInformation()
+{
+ this->InternalFileList=*(this->CoherentFileList);
+ this->OwnFile=false;
+
+ for(gdcmFileList::iterator it=InternalFileList.begin();
+ it!=InternalFileList.end();
+ ++it)
+ {
+ if( *it != NULL)
+ {
+ GetFileInformation(*it);
+ break;
+ }
+ }
+}
+
+/**
+ * Get the informations from a file.
+ * These informations are required to specify the output image
+ * caracteristics
+ */
+void vtkGdcmReader::GetFileInformation(GDCM_NAME_SPACE::File *file)
+{
+ // Get the image caracteristics
+ this->NumColumns = file->GetXSize();
+ this->NumLines = file->GetYSize();
+ this->NumPlanes = file->GetZSize();
+
+ if (CoherentFileList == 0)
+ this->TotalNumberOfPlanes = this->NumPlanes*InternalFileNameList.size();
+ else
+ this->TotalNumberOfPlanes = this->NumPlanes*CoherentFileList->size();
+
+ this->ImageType = file->GetPixelType();
+ this->PixelSize = file->GetPixelSize();
+
+ this->DataSpacing[0] = file->GetXSpacing();
+ this->DataSpacing[1] = file->GetYSpacing();