/*=========================================================================
 *
 *  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 itkVectorImage_hxx
#define itkVectorImage_hxx
#include "itkProcessObject.h"

namespace itk
{

//----------------------------------------------------------------------------
template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::Allocate(const bool UseValueInitialization)
{
  if (m_VectorLength == 0)
  {
    itkExceptionMacro("Cannot allocate VectorImage with VectorLength = 0");
  }

  SizeValueType num;
  this->ComputeOffsetTable();
  num = this->GetOffsetTable()[VImageDimension];

  m_Buffer->Reserve(num * m_VectorLength, UseValueInitialization);
}

template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::Initialize()
{
  //
  // We don't modify ourselves because the "ReleaseData" methods depend upon
  // no modification when initialized.
  //

  // Call the superclass which should initialize the BufferedRegion ivar.
  Superclass::Initialize();

  // Replace the handle to the buffer. This is the safest thing to do,
  // since the same container can be shared by multiple images (e.g.
  // Grafted outputs and in place filters).
  m_Buffer = PixelContainer::New();
}

template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::FillBuffer(const PixelType & value)
{
  const SizeValueType numberOfPixels = this->GetBufferedRegion().GetNumberOfPixels();

  SizeValueType ctr = 0;

  for (SizeValueType i = 0; i < numberOfPixels; ++i)
  {
    for (VectorLengthType j = 0; j < m_VectorLength; ++j)
    {
      (*m_Buffer)[ctr++] = value[j];
    }
  }
}

template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::SetPixelContainer(PixelContainer * container)
{
  if (m_Buffer != container)
  {
    m_Buffer = container;
    this->Modified();
  }
}

//----------------------------------------------------------------------------
template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::Graft(const Self * image)
{
  if (image == nullptr)
  {
    return;
  }
  // call the superclass' implementation
  Superclass::Graft(image);

  // Copy from VectorImage< TPixel, dim >
  // Now copy anything remaining that is needed
  this->SetPixelContainer(const_cast<PixelContainer *>(image->GetPixelContainer()));
}

//----------------------------------------------------------------------------
template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::Graft(const DataObject * data)
{
  if (data == nullptr)
  {
    return;
  }
  // Attempt to cast data to an Image
  const auto * imgData = dynamic_cast<const Self *>(data);

  if (imgData == nullptr)
  {
    // pointer could not be cast back down
    itkExceptionMacro("itk::VectorImage::Graft() cannot cast " << typeid(data).name() << " to "
                                                               << typeid(const Self *).name());
  }
  // Copy from VectorImage< TPixel, dim >
  // Now copy anything remaining that is needed
  this->Graft(imgData);
}

//----------------------------------------------------------------------------
template <typename TPixel, unsigned int VImageDimension>
unsigned int
VectorImage<TPixel, VImageDimension>::GetNumberOfComponentsPerPixel() const
{
  return this->m_VectorLength;
}

//----------------------------------------------------------------------------
template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::SetNumberOfComponentsPerPixel(unsigned int n)
{
  this->SetVectorLength(static_cast<VectorLengthType>(n));
}

/**
 *
 */
template <typename TPixel, unsigned int VImageDimension>
void
VectorImage<TPixel, VImageDimension>::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << indent << "VectorLength: " << m_VectorLength << std::endl;
  os << indent << "PixelContainer: " << std::endl;
  m_Buffer->Print(os, indent.GetNextIndent());

  // m_Origin and m_Spacing are printed in the Superclass
}
} // end namespace itk

#endif