vtkResizingWindowToImageFilter.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkResizingWindowToImageFilter.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 vtkResizingWindowToImageFilter_h
#define vtkResizingWindowToImageFilter_h
 
#include "vtkAlgorithm.h"
#include "vtkImageData.h"           // makes things a bit easier
#include "vtkRenderingCoreModule.h" // For export macro
 
// VTK_RGB and VTK_RGBA are defined in system includes
#define VTK_ZBUFFER 5
 
class vtkWindow;
 
class vtkWTI2DHelperClass;
class VTKRENDERINGCORE_EXPORT vtkResizingWindowToImageFilter : public vtkAlgorithm
{
public:
  static vtkResizingWindowToImageFilter* New();
 
  vtkTypeMacro(vtkResizingWindowToImageFilter, vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void SetInput(vtkWindow* input);
 
 
  vtkGetObjectMacro(Input, vtkWindow);
 
 
  vtkGetVector2Macro(Size, int);
  vtkSetVector2Macro(Size, int);
 
 
  vtkGetMacro(SizeLimit, int);
  vtkSetMacro(SizeLimit, int);
 
 
  vtkSetMacro(InputBufferType, int);
  vtkGetMacro(InputBufferType, int);
  void SetInputBufferTypeToRGB() { this->SetInputBufferType(VTK_RGB); }
  void SetInputBufferTypeToRGBA() { this->SetInputBufferType(VTK_RGBA); }
  void SetInputBufferTypeToZBuffer() { this->SetInputBufferType(VTK_ZBUFFER); }
 
  vtkImageData* GetOutput();
 
  vtkTypeBool ProcessRequest(
    vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
protected:
  vtkResizingWindowToImageFilter();
  ~vtkResizingWindowToImageFilter() override;
 
  // vtkWindow is not a vtkDataObject, so we need our own ivar.
  vtkWindow* Input;
  // requested size of the screenshot in pixels.
  int Size[2];
  // window size limit for using this filter. If the target resolution is higher we switch to
  // vtkWindowToImageFilter with tiling
  int SizeLimit;
 
  int InputBufferType;
 
  void RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
 
  virtual void RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*);
 
  // see algorithm for more info
  int FillOutputPortInformation(int port, vtkInformation* info) override;
 
  virtual void Render();
 
  void GetScaleFactorsAndSize(
    const int requestedSize[2], int actualSize[2], int scale[2], bool* approximate);
 
private:
  vtkResizingWindowToImageFilter(const vtkResizingWindowToImageFilter&) = delete;
  void operator=(const vtkResizingWindowToImageFilter&) = delete;
};
 
#endif