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

  Program:   Visualization Toolkit
  Module:    vtkImageNoiseSource.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   vtkImageNoiseSource
 * @brief   Create an image filled with noise.
 *
 * vtkImageNoiseSource just produces images filled with noise.  The only
 * option now is uniform noise specified by a min and a max.  There is one
 * major problem with this source. Every time it executes, it will output
 * different pixel values.  This has important implications when a stream
 * requests overlapping regions.  The same pixels will have different values
 * on different updates.
 */

#ifndef vtkImageNoiseSource_h
#define vtkImageNoiseSource_h

#include "vtkImageAlgorithm.h"
#include "vtkImagingSourcesModule.h" // For export macro

class VTKIMAGINGSOURCES_EXPORT vtkImageNoiseSource : public vtkImageAlgorithm
{
public:
  static vtkImageNoiseSource* New();
  vtkTypeMacro(vtkImageNoiseSource, vtkImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  ///@{
  /**
   * Set/Get the minimum and maximum values for the generated noise.
   */
  vtkSetMacro(Minimum, double);
  vtkGetMacro(Minimum, double);
  vtkSetMacro(Maximum, double);
  vtkGetMacro(Maximum, double);
  ///@}

  ///@{
  /**
   * Set how large of an image to generate.
   */
  void SetWholeExtent(int xMinx, int xMax, int yMin, int yMax, int zMin, int zMax);
  void SetWholeExtent(const int ext[6])
  {
    this->SetWholeExtent(ext[0], ext[1], ext[2], ext[3], ext[4], ext[5]);
  }
  ///@}

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

  double Minimum;
  double Maximum;
  int WholeExtent[6];

  int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
  void ExecuteDataWithInformation(vtkDataObject* data, vtkInformation* outInfo) override;

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

#endif
