DtIndirectTextureCollectionPolicy.h

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/******************************************************************************
** Copyright (c) 2018 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 <boost/unordered_map.hpp>

namespace makVrv
{
   class DtIndirectGeometryTexturesPointers;

   class DT_DLL_VRVOSG DtIndirectTextureCollectionPolicy
   {
   public:
      friend class DtIndirectTextureCollectionPolicyCreator;

      virtual ~DtIndirectTextureCollectionPolicy();

      virtual void collectTextures(DtIndirectGeometryTexturesPointers& texturePointers, const osg::StateSet* stateSet, const std::string &modelName) const = 0;

      virtual const DtIndirectEffectTexturesTemplate& effectTexturesTemplate(void) const;

      virtual const std::string& glslTextureDeclarationHashDefine(void) const;

      virtual int numFxShaders(void) const;

      virtual const DtIndirectEffectTextureShader& fxShader(int index) const;
   protected:
      DtIndirectTextureCollectionPolicy();

      DtIndirectEffectTexturesTemplate myEffectTexturesTemplate;

      std::vector<DtIndirectEffectTextureShader> myFXTextureShaders;
   };


   class DT_DLL_VRVOSG DtIndirectTextureCollectionPolicyCreator
   {
   public:
      DtIndirectTextureCollectionPolicyCreator();

      virtual ~DtIndirectTextureCollectionPolicyCreator();

      // pure abstract creation function
      virtual DtIndirectTextureCollectionPolicy* create() = 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 boost::unordered_map<std::string, DtIndirectTextureCollectionPolicyCreator*> RegistrationMap;

      RegistrationMap myCreators;
   };

}