vtkGaussianBlurPass.h

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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 vtkDepthPeelingPassLayerList; // Pimpl
class vtkOpenGLFramebufferObject;
class vtkOpenGLHelper;
class vtkOpenGLRenderWindow;
class vtkTextureObject;

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

  void Render(const vtkRenderState *s) override;

  void ReleaseGraphicsResources(vtkWindow *w) override;

 protected:
  vtkGaussianBlurPass();

  ~vtkGaussianBlurPass() override;

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

  // Structures for the various cell types we render.
  vtkOpenGLHelper *BlurProgram;

 private:
  vtkGaussianBlurPass(const vtkGaussianBlurPass&) = delete;
  void operator=(const vtkGaussianBlurPass&) = delete;
};

#endif