vtkSobelGradientMagnitudePass.h

Go to the documentation of this file.

// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkSobelGradientMagnitudePass_h
#define vtkSobelGradientMagnitudePass_h

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

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

class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO 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;
};

VTK_ABI_NAMESPACE_END
#endif