vtkImageAppend.h

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

  Program:   Visualization Toolkit
  Module:    vtkImageAppend.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.

=========================================================================*/
#ifndef vtkImageAppend_h
#define vtkImageAppend_h

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

class VTKFILTERSCORE_EXPORT vtkImageAppend : public vtkThreadedImageAlgorithm
{
public:
  static vtkImageAppend* New();
  vtkTypeMacro(vtkImageAppend, vtkThreadedImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual void ReplaceNthInputConnection(int idx, vtkAlgorithmOutput* input);


  void SetInputData(int num, vtkDataObject* input);
  void SetInputData(vtkDataObject* input) { this->SetInputData(0, input); }


  vtkDataObject* GetInput(int num);
  vtkDataObject* GetInput() { return this->GetInput(0); }

  int GetNumberOfInputs() { return this->GetNumberOfInputConnections(0); }


  vtkSetMacro(AppendAxis, int);
  vtkGetMacro(AppendAxis, int);


  vtkSetMacro(PreserveExtents, vtkTypeBool);
  vtkGetMacro(PreserveExtents, vtkTypeBool);
  vtkBooleanMacro(PreserveExtents, vtkTypeBool);

protected:
  vtkImageAppend();
  ~vtkImageAppend() override;

  vtkTypeBool PreserveExtents;
  int AppendAxis;
  // Array holds the AppendAxisExtent shift for each input.
  int* Shifts;

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

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

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

  // see vtkAlgorithm for docs.
  int FillInputPortInformation(int, vtkInformation*) override;

  void InitOutput(int outExt[6], vtkImageData* outData);

  void InternalComputeInputUpdateExtent(int* inExt, int* outExt, int* inWextent, int whichInput);

  // overridden to allocate all of the output arrays, not just active scalars
  void AllocateOutputData(vtkImageData* out, vtkInformation* outInfo, int* uExtent) override;
  vtkImageData* AllocateOutputData(vtkDataObject* out, vtkInformation* outInfo) override;

  // overridden to prevent shallow copies across, since we have to do it elementwise
  void CopyAttributeData(
    vtkImageData* in, vtkImageData* out, vtkInformationVector** inputVector) override;

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

#endif