vtkToneMappingPass.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkToneMappingPass.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 vtkToneMappingPass_h
#define vtkToneMappingPass_h

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

class vtkOpenGLFramebufferObject;
class vtkOpenGLQuadHelper;
class vtkTextureObject;

class VTKRENDERINGOPENGL2_EXPORT vtkToneMappingPass : public vtkImageProcessingPass
{
public:
  static vtkToneMappingPass* New();
  vtkTypeMacro(vtkToneMappingPass, vtkImageProcessingPass);

  void Render(const vtkRenderState* s) override;

  void ReleaseGraphicsResources(vtkWindow* w) override;

  enum
  {
    Clamp = 0,
    Reinhard = 1,
    Exponential = 2
  };


  vtkSetClampMacro(ToneMappingType, int, 0, 2);
  vtkGetMacro(ToneMappingType, int);


  vtkGetMacro(Exposure, float);
  vtkSetMacro(Exposure, float);

protected:
  vtkToneMappingPass() = default;
  ~vtkToneMappingPass() override;

  vtkOpenGLFramebufferObject* FrameBufferObject = nullptr;
  vtkTextureObject* ColorTexture = nullptr;
  vtkOpenGLQuadHelper* QuadHelper = nullptr;

  int ToneMappingType = Clamp;
  float Exposure = 1.0;

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

#endif