/*=========================================================================
 *
 *  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 itkLabelOverlayImageFilter_hxx
#define itkLabelOverlayImageFilter_hxx


namespace itk
{

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::LabelOverlayImageFilter()
{
  m_Opacity = 0.5;
  m_BackgroundValue = LabelPixelType{};
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::GenerateOutputInformation()
{
  // this methods is overloaded so that if the output image is a
  // VectorImage then the correct number of components are set.

  Superclass::GenerateOutputInformation();
  OutputImageType * output = this->GetOutput();

  if (!output)
  {
    return;
  }
  if (output->GetNumberOfComponentsPerPixel() != 3)
  {
    output->SetNumberOfComponentsPerPixel(3);
  }
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::BeforeThreadedGenerateData()
{
  this->GetFunctor().SetOpacity(m_Opacity);
  this->GetFunctor().SetBackgroundValue(m_BackgroundValue);
  this->SetFunctor(this->GetFunctor());
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::SetLabelImage(const TLabelImage * input)
{
  this->SetInput2(input);
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
auto
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::GetLabelImage() const -> const LabelImageType *
{
  return itkDynamicCastInDebugMode<LabelImageType *>(const_cast<DataObject *>(this->ProcessObject::GetInput(1)));
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
unsigned int
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::GetNumberOfColors() const
{
  return this->GetFunctor().GetNumberOfColors();
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::ResetColors()
{
  this->GetFunctor().ResetColors();
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::AddColor(ComponentType r,
                                                                          ComponentType g,
                                                                          ComponentType b)
{
  this->GetFunctor().AddColor(r, g, b);
}

template <typename TInputImage, typename TLabelImage, typename TOutputImage>
void
LabelOverlayImageFilter<TInputImage, TLabelImage, TOutputImage>::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << indent << "Opacity: " << static_cast<typename NumericTraits<double>::PrintType>(m_Opacity) << std::endl
     << indent
     << "BackgroundValue: " << static_cast<typename NumericTraits<LabelPixelType>::PrintType>(m_BackgroundValue)
     << std::endl;
}
} // end namespace itk

#endif
