vtkHexagonalBokehBlurPass.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright 2025 F3D-APP Foundation
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkHexagonalBokehBlurPass_h
#define vtkHexagonalBokehBlurPass_h
 
#include "vtkImageProcessingPass.h"
#include "vtkOpenGLQuadHelper.h"
#include "vtkSmartPointer.h"
 
class vtkTextureObject;
class vtkOpenGLFrameBuffer;
 
VTK_ABI_NAMESPACE_BEGIN
 
class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO vtkHexagonalBokehBlurPass
  : public vtkImageProcessingPass
{
public:
  static vtkHexagonalBokehBlurPass* New();
  vtkTypeMacro(vtkHexagonalBokehBlurPass, vtkImageProcessingPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void Render(const vtkRenderState* s) override;

  void ReleaseGraphicsResources(vtkWindow* w) override;


  vtkGetMacro(CircleOfConfusionRadius, float);
  vtkSetMacro(CircleOfConfusionRadius, float);
 
protected:
  vtkHexagonalBokehBlurPass() = default;
  ~vtkHexagonalBokehBlurPass() override = default;
 
private:
  vtkHexagonalBokehBlurPass(const vtkHexagonalBokehBlurPass&) = delete;
  void operator=(const vtkHexagonalBokehBlurPass&) = delete;

  void InitializeGraphicsResources(vtkOpenGLRenderWindow* renderWindow, int width, int height);

  void RenderDelegate(const vtkRenderState* s, int width, int height);

  void RenderDirectionalBlur(vtkOpenGLRenderWindow* renWin, int width, int height, float coc);

  void RenderRhomboidBlur(vtkOpenGLRenderWindow* renWin, int width, int height, float coc);
 
  float CircleOfConfusionRadius = 20.0f;
 
  vtkSmartPointer<vtkOpenGLFramebufferObject> FrameBufferObject;
  vtkSmartPointer<vtkTextureObject> VerticalBlurTexture;
  vtkSmartPointer<vtkTextureObject> DiagonalBlurTexture;
  vtkSmartPointer<vtkTextureObject> BackgroundTexture;
 
  std::unique_ptr<vtkOpenGLQuadHelper> BlurQuadHelper = nullptr;
  std::unique_ptr<vtkOpenGLQuadHelper> RhomboidQuadHelper = nullptr;
};
 
VTK_ABI_NAMESPACE_END
 
#endif // vtkHexagonalBokehBlurPass_h