DtIndirectGeometryCallback.h

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/******************************************************************************
** Copyright (c) 2020 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsgEarth/vrvOsgEarth.h>

#include <vrvOsg/DtOsgEarthFeatureDataBroker.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <vrvIndirectRendering/DtGpuCullingAndLodDefines.h>

#include <boost/unordered_map.hpp>

namespace osg
{
   class Node;
}


namespace osgEarth
{
   class MapNode;
   class Layer;
   class Map;
}

namespace makVrv
{
   class DtIndirectGeometryLayerManager;

   class DT_DLL_VRVOSGEARTH DtIndirectGeometryCallback
      : public DtOsgEarthFeatureDataBroker::Callback
   {
   public:
      virtual ~DtIndirectGeometryCallback();

   protected:
      DtIndirectGeometryCallback(DtDe& de);

      friend class DtIndirectGeometryCallbackCreator;
   
   private:
      DtIndirectGeometryCallback();

      DtIndirectGeometryCallback &operator=(const DtIndirectGeometryCallback &other);

      DtIndirectGeometryCallback(const DtIndirectGeometryCallback &other);

   public:

      virtual void onLayerLoaded(const osgEarth::MapNode* mapNode, osgEarth::Layer* layer);

      virtual void onDataPreMerge(const osgEarth::Map* map, const osgEarth::Layer* layer, osg::Node* newData);

      virtual void onDataLoaded(const osgEarth::Map* map, const osgEarth::Layer* layer, const osg::Node* newData);

      virtual void onDataUnloaded(const osgEarth::Map* map, const osgEarth::Layer* layer, const osg::Node* oldData);
   
      virtual const std::string& instanceClassName() const;

      virtual void setFeatureDataBroker(DtOsgEarthFeatureDataBroker* featureDataBroker);

   protected:
      
      virtual bool checkForIndirectRenderingParameter(osgEarth::Layer* layer);

   public:
      static const std::string& className();
   
   protected:
      static const std::string theClassName;
      DtDe& myDe;
      
      DtOsgEarthFeatureDataBroker* myFeatureDataBroker;

      typedef boost::unordered_map<const osgEarth::Layer*, DtIndirectGeometryLayerManager* > MapLayerToLayerManagerIndirectGeometry;
      MapLayerToLayerManagerIndirectGeometry myMapLayerToLayerManagerIndirectGeometry;
   
   };

   class DT_DLL_VRVOSGEARTH DtIndirectGeometryCallbackCreator : public DtVirtualBaseClass
   {
   public:
      DtIndirectGeometryCallbackCreator(DtDe &de);

      virtual ~DtIndirectGeometryCallbackCreator();

   private:
      DtIndirectGeometryCallbackCreator(const DtIndirectGeometryCallbackCreator &other);
      DtIndirectGeometryCallbackCreator &operator=(const DtIndirectGeometryCallbackCreator &other);

   public:
      static DtIndirectGeometryCallbackCreator& instance(DtDe& de);

      static void registerInstance(DtDe& de,
         DtIndirectGeometryCallbackCreator* instance);

      virtual DtIndirectGeometryCallback* create();

   protected:

      DtDe& myDe;

   };
}