vtkOrderIndependentTranslucentPass.h

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

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

VTK_ABI_NAMESPACE_BEGIN
class vtkOpenGLFramebufferObject;
class vtkTextureObject;
class vtkOpenGLRenderWindow;
class vtkOpenGLState;
class vtkOpenGLQuadHelper;

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

  void Render(const vtkRenderState* s) override;

  void ReleaseGraphicsResources(vtkWindow* w) override;


  vtkGetObjectMacro(TranslucentPass, vtkRenderPass);
  virtual void SetTranslucentPass(vtkRenderPass* translucentPass);

  // vtkOpenGLRenderPass virtuals:
  bool PostReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
    std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;

protected:
  vtkOrderIndependentTranslucentPass();

  ~vtkOrderIndependentTranslucentPass() override;

  vtkRenderPass* TranslucentPass;


  int ViewportX;
  int ViewportY;
  int ViewportWidth;
  int ViewportHeight;

  vtkOpenGLFramebufferObject* Framebuffer;
  vtkOpenGLQuadHelper* FinalBlend;

  vtkTextureObject* TranslucentRGBATexture;
  vtkTextureObject* TranslucentRTexture;
  vtkTextureObject* TranslucentZTexture;

  void BlendFinalPeel(vtkOpenGLRenderWindow* renWin);

  // useful to store
  vtkOpenGLState* State;

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

VTK_ABI_NAMESPACE_END
#endif