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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkImageDotProduct.cxx,v $
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkImageDotProduct.h"
#include "vtkImageData.h"
#include "vtkImageProgressIterator.h"
#include "vtkObjectFactory.h"
vtkCxxRevisionMacro(vtkImageDotProduct, "$Revision: 1.28 $");
vtkStandardNewMacro(vtkImageDotProduct);
//----------------------------------------------------------------------------
// Colapse the first axis
void vtkImageDotProduct::ExecuteInformation(vtkImageData **vtkNotUsed(inDatas),
vtkImageData *outData)
{
outData->SetNumberOfScalarComponents(1);
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
// Handles the two input operations
template <class T>
void vtkImageDotProductExecute(vtkImageDotProduct *self,
vtkImageData *in1Data,
vtkImageData *in2Data,
vtkImageData *outData,
int outExt[6], int id, T *)
{
vtkImageIterator<T> inIt1(in1Data, outExt);
vtkImageIterator<T> inIt2(in2Data, outExt);
vtkImageProgressIterator<T> outIt(outData, outExt, self, id);
float dot;
// find the region to loop over
int maxC = in1Data->GetNumberOfScalarComponents();
int idxC;
// Loop through ouput pixels
while (!outIt.IsAtEnd())
{
T* inSI1 = inIt1.BeginSpan();
T* inSI2 = inIt2.BeginSpan();
T* outSI = outIt.BeginSpan();
T* outSIEnd = outIt.EndSpan();
while (outSI != outSIEnd)
{
// now process the components
dot = 0.0;
for (idxC = 0; idxC < maxC; idxC++)
{
dot += (float)(*inSI1 * *inSI2);
++inSI1;
++inSI2;
}
*outSI = static_cast<T>(dot);
++outSI;
}
inIt1.NextSpan();
inIt2.NextSpan();
outIt.NextSpan();
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output regions, and executes the filter
// algorithm to fill the output from the inputs.
// It just executes a switch statement to call the correct function for
// the regions data types.
void vtkImageDotProduct::ThreadedExecute(vtkImageData **inData,
vtkImageData *outData,
int outExt[6], int id)
{
vtkDebugMacro(<< "Execute: inData = " << inData
<< ", outData = " << outData);
if (inData[0] == NULL)
{
vtkErrorMacro(<< "Input " << 0 << " must be specified.");
return;
}
if (inData[1] == NULL)
{
vtkErrorMacro(<< "Input " << 1 << " must be specified.");
return;
}
// this filter expects that input is the same type as output.
if (inData[0]->GetScalarType() != outData->GetScalarType())
{
vtkErrorMacro(<< "Execute: input1 ScalarType, "
<< inData[0]->GetScalarType()
<< ", must match output ScalarType "
<< outData->GetScalarType());
return;
}
if (inData[1]->GetScalarType() != outData->GetScalarType())
{
vtkErrorMacro(<< "Execute: input2 ScalarType, "
<< inData[1]->GetScalarType()
<< ", must match output ScalarType "
<< outData->GetScalarType());
return;
}
// this filter expects that inputs that have the same number of components
if (inData[0]->GetNumberOfScalarComponents() !=
inData[1]->GetNumberOfScalarComponents())
{
vtkErrorMacro(<< "Execute: input1 NumberOfScalarComponents, "
<< inData[0]->GetNumberOfScalarComponents()
<< ", must match out input2 NumberOfScalarComponents "
<< inData[1]->GetNumberOfScalarComponents());
return;
}
switch (inData[0]->GetScalarType())
{
vtkTemplateMacro7(vtkImageDotProductExecute, this, inData[0],
inData[1], outData, outExt, id,
static_cast<VTK_TT *>(0));
default:
vtkErrorMacro(<< "Execute: Unknown ScalarType");
return;
}
}
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