DtIndirectShaderManager.h

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/*****************************************************************************
 * Copyright (c) 2023 MAK Technologies, Inc.
 * All rights reserved.
 *****************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvOsg/DtIndirectEffectTexturesTemplate.h>

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

#include <tbb/concurrent_hash_map.h>

namespace makVrv
{
   class DtDe;

   class DtIndirectDefaultDrawComponent;
   class DtIndirectLightPointDrawComponent;
   class DtIndirectDebugCullComponent;
   class DtEffectTextureRegistry;

   struct DtIndirectShaderComponents
   {
   public:
      DtIndirectShaderComponents();
      ~DtIndirectShaderComponents();
   public:
      DtIndirectDefaultDrawComponent* myDefaultDrawComponent = nullptr;
      DtIndirectLightPointDrawComponent* myLightPointDrawComponent = nullptr;
   };

   struct DtIndirectShaderKeyType
   {
      DtIndirectEffectTexturesTemplate* myEffectTexturesTemplate = nullptr;
      int myNumTextCoordArrays = 0;
   };

   class DT_DLL_VRVOSG DtIndirectShaderManager : public DtVirtualBaseClass
   {
   public:
      virtual ~DtIndirectShaderManager();

      static DtIndirectShaderManager& instance(DtDe& de);

   protected:
      DtIndirectShaderManager(DtDe& de);

   private:
      DtIndirectShaderManager() = delete;
      DtIndirectShaderManager(const DtIndirectShaderManager&) = delete;
      DtIndirectShaderManager& operator=(const DtIndirectShaderManager&) = delete;

   public:
      virtual DtIndirectShaderComponents* getOrCreate(const DtIndirectEffectTexturesTemplate& effectTexturesTemplate
      , int numTextCoordArrays);

      virtual DtIndirectShaderComponents* find(const DtIndirectEffectTexturesTemplate& effectTexturesTemplate
         , int numTextCoordArrays);

      virtual DtIndirectDebugCullComponent* debugComponent(void) const;

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

      virtual std::string hashString(const DtIndirectEffectTexturesTemplate& effectTexturesState, unsigned int numTextureCoordArrays) const;
   protected:
      size_t hash(const DtIndirectEffectTexturesTemplate& effectTexturesTemplate, int numTextCoordArrays);

      virtual void compareAndInsertHashDefine(std::stringstream& ss, int type, int effectTextureIdx) const;

      virtual void slot_reloadShaders();

   protected:
      DtDe& myDe;

      typedef tbb::concurrent_hash_map< size_t, DtIndirectShaderComponents*> HashTable;
      HashTable myHashTable;

      mutable DtIndirectDebugCullComponent* myIndirectDebugCullComponent = nullptr;

      DtEffectTextureRegistry& myEffectTextureRegistry;

      DtSignalConnectionManager myConnections;
   };
}