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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkComposeImageFilter_hxx
#define itkComposeImageFilter_hxx
#include "itkImageRegionIterator.h"
#include "itkTotalProgressReporter.h"
namespace itk
{
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
ComposeImageFilter<TInputImage, TOutputImage>::ComposeImageFilter()
{
int nbOfComponents = NumericTraits<OutputPixelType>::GetLength({});
nbOfComponents = std::max(1, nbOfComponents); // require at least one input
this->SetNumberOfRequiredInputs(nbOfComponents);
this->DynamicMultiThreadingOn();
this->ThreaderUpdateProgressOff();
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::SetInput1(const InputImageType * image1)
{
// The ProcessObject is not const-correct so the const_cast is required here
this->SetNthInput(0, const_cast<InputImageType *>(image1));
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::SetInput2(const InputImageType * image2)
{
// The ProcessObject is not const-correct so the const_cast is required here
this->SetNthInput(1, const_cast<InputImageType *>(image2));
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::SetInput3(const InputImageType * image3)
{
// The ProcessObject is not const-correct so the const_cast is required here
this->SetNthInput(2, const_cast<InputImageType *>(image3));
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::GenerateOutputInformation()
{
// Override the method in itkImageSource, so we can set the vector length of
// the output itk::VectorImage
this->Superclass::GenerateOutputInformation();
OutputImageType * output = this->GetOutput();
output->SetNumberOfComponentsPerPixel(static_cast<unsigned int>(this->GetNumberOfIndexedInputs()));
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::BeforeThreadedGenerateData()
{
// Check to verify all inputs are specified and have the same metadata,
// spacing etc...
const auto numberOfInputs = static_cast<const unsigned int>(this->GetNumberOfIndexedInputs());
RegionType region;
for (unsigned int i = 0; i < numberOfInputs; ++i)
{
auto * input = itkDynamicCastInDebugMode<InputImageType *>(this->ProcessObject::GetInput(i));
if (!input)
{
itkExceptionMacro("Input " << i << " not set!");
}
if (i == 0)
{
region = input->GetLargestPossibleRegion();
}
else if (input->GetLargestPossibleRegion() != region)
{
itkExceptionMacro("All Inputs must have the same dimensions.");
}
}
}
//----------------------------------------------------------------------------
template <typename TInputImage, typename TOutputImage>
void
ComposeImageFilter<TInputImage, TOutputImage>::DynamicThreadedGenerateData(const RegionType & outputRegionForThread)
{
typename OutputImageType::Pointer outputImage = static_cast<OutputImageType *>(this->ProcessObject::GetOutput(0));
TotalProgressReporter progress(this, outputImage->GetRequestedRegion().GetNumberOfPixels());
ImageRegionIterator<OutputImageType> oit(outputImage, outputRegionForThread);
InputIteratorContainerType inputItContainer;
for (unsigned int i = 0; i < this->GetNumberOfIndexedInputs(); ++i)
{
const InputImageType * inputImage = this->GetInput(i);
InputIteratorType iit(inputImage, outputRegionForThread);
iit.GoToBegin();
inputItContainer.push_back(iit);
}
OutputPixelType pix;
NumericTraits<OutputPixelType>::SetLength(pix, static_cast<unsigned int>(this->GetNumberOfIndexedInputs()));
while (!oit.IsAtEnd())
{
ComputeOutputPixel(pix, inputItContainer);
oit.Set(pix);
++oit;
progress.CompletedPixel();
}
}
} // end namespace itk
#endif
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