-// $Header: /cvs/public/gdcm/vtk/vtkGdcmReader.cxx,v 1.6 2003/05/29 16:58:24 frog Exp $
+// $Header: /cvs/public/gdcm/vtk/vtkGdcmReader.cxx,v 1.7 2003/05/30 18:48:36 frog Exp $
//CLEANME#include <vtkByteSwap.h>
#include <stdio.h>
#include <vtkObjectFactory.h>
// Starting from two files we have a stack of images:
if(this->FileNameList.size() >= 2)
this->SetFileDimensionality(3);
+ this->Modified();
}
//----------------------------------------------------------------------------
ReferenceNY = NY;
ReferenceNZ = NZ;
ReferenceType = type;
- vtkDebugMacro("File is taken a coherence references" << *FileName);
+ vtkDebugMacro("This file taken as coherence reference:" << *FileName);
}
} // End of loop on FileName
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())
+ if ( ! this->CheckFileCoherence() )
{
- vtkErrorMacro("Gdcm cannot parse file " << this->InternalFileName);
- return;
+ vtkErrorMacro("File set is not coherent. Exiting...");
+ return;
}
+ string ReferenceFile = this->FileNameList.front();
+ gdcmHeader GdcmHeader(ReferenceFile.c_str());
int NX = GdcmHeader.GetXSize();
int NY = GdcmHeader.GetYSize();
(this->DataVOI[5] >= NZ))
{
vtkWarningMacro("The requested VOI is larger than the file's ("
- << this->InternalFileName << ") extent ");
+ << ReferenceFile << ") extent ");
this->DataVOI[0] = 0;
this->DataVOI[1] = NX - 1;
this->DataVOI[2] = 0;
}
else
{
- vtkErrorMacro("Bad File Type " << this->InternalFileName
+ vtkErrorMacro("Bad File Type " << ReferenceFile
<< "Type " << type.c_str());
return;
}
vtkImageReader::ExecuteInformation();
}
+//----------------------------------------------------------------------------
+void vtkGdcmReader::LoadImageInMemory(string FileName,
+ unsigned char * Dest,
+ size_t size)
+{
+ vtkDebugMacro("Copying to memmory image" << FileName.c_str());
+ gdcmFile GdcmFile(FileName.c_str());
+
+ if (GdcmFile.GetZSize() != 1 )
+ vtkErrorMacro("Cannot handle images with multiple planes");
+
+ // First check the expected size of the image is the one found by gdcm.
+ if ( size != GdcmFile.GetImageDataSize() )
+ {
+ vtkErrorMacro("Inconsistency with GetImageDataSize for file"
+ << FileName.c_str());
+ vtkErrorMacro("Number of scalar components"
+ << this->NumberOfScalarComponents);
+ }
+
+ // If the data structure of vtk for image/volume representation
+ // were straigthforwards the following would suffice:
+ // GdcmFile.GetImageDataIntoVector((void*)Dest, 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 NumColumns = GdcmFile.GetXSize();
+ int NumLines = GdcmFile.GetYSize();
+ int LineSize = NumColumns * GdcmFile.GetPixelSize();
+ unsigned char * Source = (unsigned char*)GdcmFile.GetImageData();
+ unsigned char * Destination = Dest + size - LineSize;
+ for (int i = 0; i < NumLines; i++)
+ {
+ memcpy((void*)Destination, (void*)Source, LineSize);
+ Source += LineSize;
+ Destination -= LineSize;
+ }
+}
+
//----------------------------------------------------------------------------
// Update -> UpdateData -> Execute -> ExecuteData (see vtkSource.cxx for
// last step.
// same as the file extent/order.
void vtkGdcmReader::ExecuteData(vtkDataObject *output)
{
- if (!this->FileName)
+ if (this->FileNameList.empty())
{
- vtkErrorMacro("A valid FileName must be specified.");
+ vtkErrorMacro("A least a valid FileName must be specified.");
return;
}
vtkImageData *data = this->AllocateOutputData(output);
data->SetExtent(this->DataExtent);
- data->GetPointData()->GetScalars()->SetName("ImageFile");
+ data->GetPointData()->GetScalars()->SetName("DicomImage-Volume");
// 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);
+ // size of the pixel data as annouced by gdcm (looks a bit paranoid)
+ // for the reference file (i.e. the first one in the list):
+ string ReferenceFile = this->FileNameList.front();
+ gdcmFile GdcmFile(ReferenceFile.c_str());
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;
vtkDebugMacro("Number of scalar components"
<< this->NumberOfScalarComponents);
}
+
+ // The memory size for a full stack of images of course depends
+ // on the number of images:
+ size_t stack_size = size * this->FileNameList.size();
// Allocate pixel data space itself.
- unsigned char *mem = new unsigned char [size];
+ unsigned char *mem = new unsigned char [stack_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++)
+ unsigned char * Dest = mem;
+ for (std::list<std::string>::iterator FileName = FileNameList.begin();
+ FileName != FileNameList.end();
+ ++FileName)
{
- memcpy((void*)Destination, (void*)Source, LineSize);
- Source += LineSize;
- Destination -= LineSize;
+ this->LoadImageInMemory(*FileName, Dest, size);
+ Dest += size;
}
+
+
// 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);
+ stack_size = stack_size / GdcmFile.GetPixelSize();
+ data->GetPointData()->GetScalars()->SetVoidArray(mem, stack_size, 0);
this->Modified();
}
projects / gdcm.git / commitdiff