DtShaderEffect.h

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/******************************************************************************
** Copyright (c) 2021 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvUtil/DtVirtualBaseClass.h>
#include <vrvUtil/DtSignalConnectionManager.h>

#include <vrvOsg/DtIndirectTextureProcessor.h>
#include <vrvOsg/DtShaderEffectManager.h>

#include <matrix/vlVector.h>

#include <string>
#include <vector>

#include <osg/Texture>
#include <osg/Uniform>
#include <osg/ref_ptr>

namespace osg
{
   class GraphicsContext;
}

namespace makVrv
{
   class DtOsgWeatherEffectsObject;
   class DtIndirectTextureProcessor;

   class DT_DLL_VRVOSG DtShaderEffect : public DtVirtualBaseClass
   {
   public:

      struct DT_DLL_VRVOSG DtShaderEffectTextureData
      {
      public:
         osg::ref_ptr<osg::Texture> myTexture;
         osg::ref_ptr<osg::Uniform> myUniform;
         GLuint64 myTextureAddress;
      };

      typedef std::vector<DtShaderEffectTextureData> TextureDataPtrVector;

   public:
      virtual ~DtShaderEffect();

      DtShaderEffect() = delete;
      DtShaderEffect(const DtShaderEffect&) = delete;
      DtShaderEffect &operator=(const DtShaderEffect&) = delete;

   protected:
      DtShaderEffect(DtDe& de);

   public:
      virtual void initializeEffect(const std::vector<osg::StateSet*>& statesets,
         DtIndirectTextureProcessor* textureProcessor, DtOsgRenderer& osgRenderer);
            
      virtual void registerWeatherEffectsObject(DtOsgWeatherEffectsObject* weatherEffectsObject) = 0;

      virtual void updateTextureUniforms(const osg::GraphicsContext* graphicsContext);

      virtual void setCameraLocation(const DtVector& location);

      virtual void setWindSpeed(float speed);

      virtual void setWindDirection(float direction);

      virtual void setEffectDirty(bool dirty);

      virtual bool effectDirty();

      virtual void updateImGui() = 0;

      virtual void updateUniforms() = 0;

      virtual void releaseGLObjects(osg::State* state);

   protected:

      virtual int loadShaderEffectTexture(const std::string& filename, const std::string& uniformName);

      virtual int addShaderEffectTexture(osg::Texture* shaderEffectTexture, const std::string& uniformName);

   protected:

      DtDe& myDe;

      TextureDataPtrVector myShaderEffectTextures;

      DtIndirectTextureProcessor* myTextureProcessor;

      bool myEffectDirty;

   };
}