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

  Program:   Visualization Toolkit
  Module:    vtkGaussianBlurPass.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 vtkGaussianBlurPass_h
#define vtkGaussianBlurPass_h

#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkImageProcessingPass.h"

class vtkOpenGLRenderWindow;
class vtkDepthPeelingPassLayerList; // Pimpl
class vtkFrameBufferObject;
class vtkTextureObject;
namespace vtkgl
{
class CellBO;
}

class VTKRENDERINGOPENGL2_EXPORT vtkGaussianBlurPass : public vtkImageProcessingPass
{
public:
  static vtkGaussianBlurPass *New();
  vtkTypeMacro(vtkGaussianBlurPass,vtkImageProcessingPass);
  void PrintSelf(ostream& os, vtkIndent indent);

  //BTX

  virtual void Render(const vtkRenderState *s);
  //ETX

  void ReleaseGraphicsResources(vtkWindow *w);

 protected:
  vtkGaussianBlurPass();

  virtual ~vtkGaussianBlurPass();


  vtkFrameBufferObject *FrameBufferObject;
  vtkTextureObject *Pass1; // render target for the scene
  vtkTextureObject *Pass2; // render target for the horizontal pass

  // Structures for the various cell types we render.
  vtkgl::CellBO *BlurProgram;

  bool Supported;
  bool SupportProbed;

 private:
  vtkGaussianBlurPass(const vtkGaussianBlurPass&);  // Not implemented.
  void operator=(const vtkGaussianBlurPass&);  // Not implemented.
};

#endif