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

  Program:   Visualization Toolkit
  Module:    vtkImageAppendComponents.h

  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.

=========================================================================*/
/**
 * @class   vtkImageAppendComponents
 * @brief   Collects components from two inputs into
 * one output.
 *
 * vtkImageAppendComponents takes the components from two inputs and merges
 * them into one output. If Input1 has M components, and Input2 has N
 * components, the output will have M+N components with input1
 * components coming first.
 */

#ifndef vtkImageAppendComponents_h
#define vtkImageAppendComponents_h

#include "vtkImagingCoreModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"

class VTKIMAGINGCORE_EXPORT vtkImageAppendComponents : public vtkThreadedImageAlgorithm
{
public:
  static vtkImageAppendComponents* New();
  vtkTypeMacro(vtkImageAppendComponents, vtkThreadedImageAlgorithm);

  /**
   * Replace one of the input connections with a new input.  You can
   * only replace input connections that you previously created with
   * AddInputConnection() or, in the case of the first input,
   * with SetInputConnection().
   */
  virtual void ReplaceNthInputConnection(int idx, vtkAlgorithmOutput* input);

  //@{
  /**
   * Assign a data object as input. Note that this method does not
   * establish a pipeline connection. Use SetInputConnection() to
   * setup a pipeline connection.
   */
  void SetInputData(int num, vtkDataObject* input);
  void SetInputData(vtkDataObject* input) { this->SetInputData(0, input); }
  //@}

  //@{
  /**
   * Get one input to this filter. This method is only for support of
   * old-style pipeline connections.  When writing new code you should
   * use vtkAlgorithm::GetInputConnection(0, num).
   */
  vtkDataObject* GetInput(int num);
  vtkDataObject* GetInput() { return this->GetInput(0); }
  //@}

  /**
   * Get the number of inputs to this filter. This method is only for
   * support of old-style pipeline connections.  When writing new code
   * you should use vtkAlgorithm::GetNumberOfInputConnections(0).
   */
  int GetNumberOfInputs() { return this->GetNumberOfInputConnections(0); }

protected:
  vtkImageAppendComponents() = default;
  ~vtkImageAppendComponents() override = default;

  int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

  void ThreadedRequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector, vtkImageData*** inData, vtkImageData** outData, int ext[6],
    int id) override;

  // Implement methods required by vtkAlgorithm.
  int FillInputPortInformation(int, vtkInformation*) override;

private:
  vtkImageAppendComponents(const vtkImageAppendComponents&) = delete;
  void operator=(const vtkImageAppendComponents&) = delete;
};

#endif

// VTK-HeaderTest-Exclude: vtkImageAppendComponents.h
