/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkSimpleImageToImageFilter.cxx

  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 "vtkSimpleImageToImageFilter.h"

#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"

//----------------------------------------------------------------------------
vtkSimpleImageToImageFilter::vtkSimpleImageToImageFilter() = default;

//----------------------------------------------------------------------------
vtkSimpleImageToImageFilter::~vtkSimpleImageToImageFilter() = default;

//----------------------------------------------------------------------------
int vtkSimpleImageToImageFilter::RequestUpdateExtent(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* vtkNotUsed(outputVector))
{
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);

  // always request the whole extent
  inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),
    inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT()), 6);

  return 1;
}

//----------------------------------------------------------------------------
int vtkSimpleImageToImageFilter::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the data object
  vtkInformation* outInfo = outputVector->GetInformationObject(0);
  vtkImageData* output = vtkImageData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  vtkImageData* input = vtkImageData::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));

  int inExt[6];
  input->GetExtent(inExt);
  // if the input extent is empty then exit
  if (inExt[1] < inExt[0] || inExt[3] < inExt[2] || inExt[5] < inExt[4])
  {
    return 1;
  }

  // Set the extent of the output and allocate memory.
  output->SetExtent(outInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT()));
  output->AllocateScalars(outInfo);

  this->SimpleExecute(input, output);

  return 1;
}

//----------------------------------------------------------------------------
void vtkSimpleImageToImageFilter::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}
