vtkOutlineGlowPass.h

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

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

VTK_ABI_NAMESPACE_BEGIN
class vtkOpenGLFramebufferObject;
class vtkOpenGLHelper;
class vtkTextureObject;

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

  void Render(const vtkRenderState* s) override;

  void ReleaseGraphicsResources(vtkWindow* w) override;

  vtkGetMacro(OutlineIntensity, float);
  vtkSetMacro(OutlineIntensity, float);

protected:
  vtkOutlineGlowPass();

  ~vtkOutlineGlowPass() override;

  vtkOpenGLFramebufferObject* FrameBufferObject;
  vtkTextureObject* ScenePass; // render target for the original scene
  vtkTextureObject* BlurPass1; // render target for vertical blur
  vtkTextureObject* BlurPass2; // render target for horizontal blur

  // Shader programs
  vtkOpenGLHelper* BlurProgram;
  vtkOpenGLHelper* UpscaleProgram;

  // Default value of 3.0 gives a bright outline with a fading edge
  float OutlineIntensity = 3.0f;

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

VTK_ABI_NAMESPACE_END
#endif /* vtkOutlineGlowPass_h */