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 "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkImageProcessingPass.h"
 
class vtkOpenGLRenderWindow;
class vtkDepthPeelingPassLayerList; // Pimpl
class vtkShaderProgram2;
class vtkShader2;
class vtkFrameBufferObject;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL_EXPORT vtkSobelGradientMagnitudePass : public vtkImageProcessingPass
{
public:
  static vtkSobelGradientMagnitudePass *New();
  vtkTypeMacro(vtkSobelGradientMagnitudePass,vtkImageProcessingPass);
  void PrintSelf(ostream& os, vtkIndent indent);
 
  //BTX
 
  virtual void Render(const vtkRenderState *s);
  //ETX
 
  void ReleaseGraphicsResources(vtkWindow *w);
 
 protected:
  vtkSobelGradientMagnitudePass();
 
  virtual ~vtkSobelGradientMagnitudePass();
 
 
  vtkFrameBufferObject *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
  vtkShaderProgram2 *Program1; // shader to compute Gx1 and Gy1
  vtkShaderProgram2 *Program2; // shader to compute |G| from Gx1 and Gy1
 
 private:
  vtkSobelGradientMagnitudePass(const vtkSobelGradientMagnitudePass&);  // Not implemented.
  void operator=(const vtkSobelGradientMagnitudePass&);  // Not implemented.
};
 
#endif