vtkImageBlend.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkImageBlend.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 vtkImageBlend_h
#define vtkImageBlend_h
 
#include "vtkImagingCoreModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"
 
class vtkImageStencilData;
 
#define VTK_IMAGE_BLEND_MODE_NORMAL 0
#define VTK_IMAGE_BLEND_MODE_COMPOUND 1
 
class VTKIMAGINGCORE_EXPORT vtkImageBlend : public vtkThreadedImageAlgorithm
{
public:
  static vtkImageBlend* New();
  vtkTypeMacro(vtkImageBlend, 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); }
 
 
  void SetOpacity(int idx, double opacity);
  double GetOpacity(int idx);
 
  void SetStencilConnection(vtkAlgorithmOutput* algOutput);
 
 
  void SetStencilData(vtkImageStencilData* stencil);
  vtkImageStencilData* GetStencil();
 
 
  vtkSetClampMacro(BlendMode, int, VTK_IMAGE_BLEND_MODE_NORMAL, VTK_IMAGE_BLEND_MODE_COMPOUND);
  vtkGetMacro(BlendMode, int);
  void SetBlendModeToNormal() { this->SetBlendMode(VTK_IMAGE_BLEND_MODE_NORMAL); }
  void SetBlendModeToCompound() { this->SetBlendMode(VTK_IMAGE_BLEND_MODE_COMPOUND); }
  const char* GetBlendModeAsString(void);
 
 
  vtkSetMacro(CompoundThreshold, double);
  vtkGetMacro(CompoundThreshold, double);
 
 
  vtkSetMacro(CompoundAlpha, vtkTypeBool);
  vtkGetMacro(CompoundAlpha, vtkTypeBool);
  vtkBooleanMacro(CompoundAlpha, vtkTypeBool);
 
protected:
  vtkImageBlend();
  ~vtkImageBlend() override;
 
  int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
  void InternalComputeInputUpdateExtent(int inExt[6], int outExt[6], int inWExtent[6]);
 
  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;
 
  // see vtkAlgorithm for docs.
  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  double* Opacity;
  int OpacityArrayLength;
  int BlendMode;
  double CompoundThreshold;
  int DataWasPassed;
  vtkTypeBool CompoundAlpha;
 
private:
  vtkImageBlend(const vtkImageBlend&) = delete;
  void operator=(const vtkImageBlend&) = delete;
};
 
inline const char* vtkImageBlend::GetBlendModeAsString()
{
  switch (this->BlendMode)
  {
    case VTK_IMAGE_BLEND_MODE_NORMAL:
      return "Normal";
    case VTK_IMAGE_BLEND_MODE_COMPOUND:
      return "Compound";
    default:
      return "Unknown Blend Mode";
  }
}
 
#endif