vtkSobelGradientMagnitudePass.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkSobelGradientMagnitudePass.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 vtkSobelGradientMagnitudePass_h
#define vtkSobelGradientMagnitudePass_h
 
#include "vtkImageProcessingPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
 
class vtkDepthPeelingPassLayerList; // Pimpl
class vtkOpenGLFramebufferObject;
class vtkOpenGLHelper;
class vtkOpenGLRenderWindow;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL2_EXPORT vtkSobelGradientMagnitudePass : public vtkImageProcessingPass
{
public:
  static vtkSobelGradientMagnitudePass* New();
  vtkTypeMacro(vtkSobelGradientMagnitudePass, vtkImageProcessingPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void Render(const vtkRenderState* s) override;
 
  void ReleaseGraphicsResources(vtkWindow* w) override;
 
protected:
  vtkSobelGradientMagnitudePass();
 
  ~vtkSobelGradientMagnitudePass() override;
 
  vtkOpenGLFramebufferObject* FrameBufferObject;
  vtkTextureObject* Pass1; // render target for the scene
  vtkTextureObject* Gx1;   // render target 0 for the first shader
  vtkTextureObject* Gy1;   // render target 1 for the first shader
 
  // Structures for the various cell types we render.
  vtkOpenGLHelper* Program1; // shader to compute Gx1 and Gy1
  vtkOpenGLHelper* Program2; // shader to compute |G| from Gx1 and Gy1
 
private:
  vtkSobelGradientMagnitudePass(const vtkSobelGradientMagnitudePass&) = delete;
  void operator=(const vtkSobelGradientMagnitudePass&) = delete;
};
 
#endif