DtHdrDrawable.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/
// This file is derived from the HDR NVIDIA gameworks SDK example
//----------------------------------------------------------------------------------
// Multiple Files in folder:        es3aep-kepler\HDR/
// SDK Version: v2.11 
// Email:       gameworks@nvidia.com
// Site:        http://developer.nvidia.com/
//
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#pragma once



// Get proper local export symbol
#include <vrvPostProcessor/vrvPostProcessor.h>
#include <vrvPostProcessor/DtPostProcessorDrawable.h>
#include <vrvPostProcessor/DtHdrTypes.h>

#include <osg/Drawable>
#include <osg/Texture>
#include <osg/Texture2D>

#include <vrvUtil/DtSignalConnectionManager.h>

namespace osg
{
   class Object;
   class State;
   class RenderInfo;
   class CopyOp;
}

namespace makVrv
{
   class DtDe;
   class DtGlTexture;
   class DtGlBuffer;
   class DtGlProgram;
   class DtHdrDrawableRenderData;

   class DT_DLL_VRVPOSTPROCESSOR DtHdrDrawable : public DtPostProcessorDrawable
   {
   public:
      DtHdrDrawable(DtDe& de, DtHdrOptions options, osg::Texture* lensFlareTexture, bool isFirstChannel);

      virtual ~DtHdrDrawable();
   private:
      DtHdrDrawable() = delete;

      DtHdrDrawable(const DtHdrDrawable&) = delete;

      DtHdrDrawable& operator=(const DtHdrDrawable&) = delete;
   public:

      virtual void drawImplementation(osg::RenderInfo& renderInfo) const override;

      virtual void setInputTexture(osg::Texture* inputTex);

      virtual void setEnabled(bool enabled);
      virtual bool enabled();

      virtual DtHdrOptions& options();

      virtual void setLumOverride(bool lumOverride);
      virtual bool lumOverride(void) const;

      // should just pass through without applying any effects
      // used by SensorFX to turn off HDR on a per channel basis.
      virtual void setHdrPassthrough(bool enable);
      virtual bool hdrPassthrough() const;

      virtual void cleanupGpuMemory();

      virtual float localHdrOutputScale();

   protected:
      bool myEnabled;

      DtHdrOptions myOptions;

      bool myLumOverride;
      bool myEnableHdrPassthrough;
   
      friend class DtHdrDrawableRenderData;
      DtHdrDrawableRenderData* myRenderData = nullptr;

      const bool myIsFirstChannel = false;
   };
}