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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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkChangeRegionLabelMapFilter_hxx
#define itkChangeRegionLabelMapFilter_hxx
#include "itkProgressReporter.h"
namespace itk
{
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// We need all the input.
InputImagePointer input = const_cast<InputImageType *>(this->GetInput());
if (!input)
{
return;
}
input->SetRequestedRegion(input->GetLargestPossibleRegion());
}
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::GenerateOutputInformation()
{
Superclass::GenerateOutputInformation();
this->GetOutput()->SetLargestPossibleRegion(m_Region);
}
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::EnlargeOutputRequestedRegion(DataObject *)
{
this->GetOutput()->SetRequestedRegion(this->GetOutput()->GetLargestPossibleRegion());
}
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::GenerateData()
{
if (m_Region.IsInside(this->GetInput()->GetLargestPossibleRegion()))
{
// only copy the image, report progress anyway
ProgressReporter progress(this, 0, 1);
this->AllocateOutputs();
}
else
{
// call the superclass implementation so it will take care to create the
// threads
Superclass::GenerateData();
}
}
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::ThreadedProcessLabelObject(LabelObjectType * labelObject)
{
auto tmp = LabelObjectType::New();
tmp->template CopyAllFrom<LabelObjectType>(labelObject);
labelObject->Clear();
const IndexType idxMin = m_Region.GetIndex();
IndexType idxMax;
for (unsigned int i = 0; i < ImageDimension; ++i)
{
idxMax[i] = idxMin[i] + m_Region.GetSize()[i] - 1;
}
typename LabelObjectType::ConstLineIterator lit(tmp);
while (!lit.IsAtEnd())
{
const IndexType idx = lit.GetLine().GetIndex();
const IndexValueType length = lit.GetLine().GetLength();
bool outside = false;
for (unsigned int i = 1; i < ImageDimension; ++i)
{
if (idx[i] < idxMin[i] || idx[i] > idxMax[i])
{
outside = true;
}
}
// check the axis 0
if (!outside)
{
const IndexValueType lastIdx0 = idx[0] + length - 1;
if (!((idx[0] < idxMin[0] && lastIdx0 < idxMin[0]) || (idx[0] > idxMax[0] && lastIdx0 > idxMax[0])))
{
IndexType newIdx = idx;
IndexValueType newLength = length;
if (idx[0] < idxMin[0])
{
newLength -= idxMin[0] - idx[0];
newIdx[0] = idxMin[0];
}
if (lastIdx0 > idxMax[0])
{
newLength -= lastIdx0 - idxMax[0];
}
labelObject->AddLine(newIdx, newLength);
}
}
++lit;
}
// remove the object if it is empty
if (labelObject->Empty())
{
const std::lock_guard<std::mutex> lockGuard(this->m_LabelObjectContainerLock);
this->GetOutput()->RemoveLabelObject(labelObject);
}
}
template <typename TInputImage>
void
ChangeRegionLabelMapFilter<TInputImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Region: " << m_Region << std::endl;
}
} // end namespace itk
#endif
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