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);
 
  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);
 
protected:
  vtkImageBlend();
  ~vtkImageBlend();
 
  virtual int RequestUpdateExtent(vtkInformation *,
                                  vtkInformationVector **,
                                  vtkInformationVector *);
 
  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);
 
  // see vtkAlgorithm for docs.
  virtual int FillInputPortInformation(int, vtkInformation*);
 
  // see vtkAlgorithm for docs.
  virtual int RequestData(vtkInformation* request,
                          vtkInformationVector** inputVector,
                          vtkInformationVector* outputVector);
 
  double *Opacity;
  int OpacityArrayLength;
  int BlendMode;
  double CompoundThreshold;
  int DataWasPassed;
 
private:
  vtkImageBlend(const vtkImageBlend&);  // Not implemented.
  void operator=(const vtkImageBlend&);  // Not implemented.
};
 
 
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