vtkRenderLargeImage.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkRenderLargeImage_h
#define vtkRenderLargeImage_h
 
#include "vtkAlgorithm.h"
#include "vtkFiltersHybridModule.h" // For export macro
#include "vtkImageData.h"           // makes things a bit easier
 
VTK_ABI_NAMESPACE_BEGIN
class vtkRenderer;
class vtkActor2DCollection;
class vtkCollection;
class vtkRenderLargeImage2DHelperClass;
 
class VTKFILTERSHYBRID_EXPORT vtkRenderLargeImage : public vtkAlgorithm
{
public:
  static vtkRenderLargeImage* New();
  vtkTypeMacro(vtkRenderLargeImage, vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  vtkSetMacro(Magnification, int);
  vtkGetMacro(Magnification, int);
 
  virtual void SetInput(vtkRenderer*);
 
 
  vtkGetObjectMacro(Input, vtkRenderer);
 
  vtkImageData* GetOutput();
 
  vtkTypeBool ProcessRequest(
    vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
protected:
  vtkRenderLargeImage();
  ~vtkRenderLargeImage() override;
 
  int Magnification;
  vtkRenderer* Input;
  void RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
  void RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
 
  // see algorithm for more info
  int FillOutputPortInformation(int port, vtkInformation* info) override;
 
  // Adjust the coordinates of all 2D actors to fit new window size
  void Rescale2DActors();
  // Shift each actor according to the tile we are rendering
  void Shift2DActors(int x, int y);
  // put them all back to their previous state when finished.
  void Restore2DActors();
  // 2D Actors need to be rescaled and shifted about for each tile
  // use this helper class to make life easier.
  vtkRenderLargeImage2DHelperClass* StoredData;
 
private:
  vtkRenderLargeImage(const vtkRenderLargeImage&) = delete;
  void operator=(const vtkRenderLargeImage&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif