DtIndirectTextureCollectionPolicy.h

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/******************************************************************************
** Copyright (c) 2022 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvOsg/DtVirtualProgramExecutionPriority.h>
#include <vrvOsg/DtIndirectEffectTextureShader.h>
#include <vrvOsg/DtIndirectEffectTexturesTemplate.h>

#include <vrvGraphicsUtils/DtCommonTypes.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <osg/Texture>

#include <unordered_map>
#include <boost/thread.hpp>


namespace makVrv
{
   class DtIndirectGeometryTextures;

   class DT_DLL_VRVOSG DtIndirectTextureCollectionPolicy
   {
   public:
      friend class DtIndirectTextureCollectionPolicyCreator;


      virtual ~DtIndirectTextureCollectionPolicy();
   protected:
      DtIndirectTextureCollectionPolicy(DtDe& de);
   public:
      virtual void collectTextures(DtIndirectGeometryTextures* texturePointers, const osg::StateSet* stateSet, const std::string &modelName) const = 0;

      virtual const DtIndirectEffectTexturesTemplate& effectTexturesTemplate(void) const;

      virtual const std::string& glslTextureDeclarationHashDefine(const DtIndirectEffectTexturesTemplate& effectTexturesState, unsigned int numTexCoords) const = 0;
      virtual void printHashDefineDetails(const DtIndirectEffectTexturesTemplate& effectTexturesState) const = 0;

      virtual std::string hashKey(const DtIndirectEffectTexturesTemplate& effectTexturesState, unsigned int textureCoordinateCount) const;

   protected:

      DtIndirectEffectTexturesTemplate myEffectTexturesTemplate;

      mutable boost::mutex myMutex;

      typedef std::map<std::string, std::string> MapEffectTexturesStateToHashDefines;
      //Cache for hash defines. It is used by the derived classes so it cannot be private
      mutable MapEffectTexturesStateToHashDefines myMutableMapEffectTexturesStateToHashDefines;

      DtDe& myDe;
   };


   class DT_DLL_VRVOSG DtIndirectTextureCollectionPolicyCreator
   {
   public:
      DtIndirectTextureCollectionPolicyCreator();

      virtual ~DtIndirectTextureCollectionPolicyCreator();

      // pure abstract creation function
      virtual DtIndirectTextureCollectionPolicy* create(DtDe& de) = 0;
   };

   class DT_DLL_VRVOSG DtIndirectTextureCollectionPolicyFactory : public DtVirtualBaseClass
   {
   public:
      DtIndirectTextureCollectionPolicyFactory(DtDe &de);

      virtual ~DtIndirectTextureCollectionPolicyFactory();

      static DtIndirectTextureCollectionPolicyFactory& instance(DtDe& de);

      static const std::string& theClassName();

      virtual void registerCreator(const std::string& name, DtIndirectTextureCollectionPolicyCreator* creator);

      virtual DtIndirectTextureCollectionPolicy* create(const std::string& name) const;
   protected:
      DtDe& myDe;

      typedef std::unordered_map<std::string, DtIndirectTextureCollectionPolicyCreator*> RegistrationMap;

      RegistrationMap myCreators;
   };

}