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