DtMergeDuplicateTextureVisitor.h

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/******************************************************************************
** Copyright (c) 2018 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/DtOsgReferencedCollection.h>
#include <vrvOsg/DtTextureCollection.h>

#include <osg/NodeVisitor>
namespace makVrv
{
   class DtTextureCollection;

   class DT_DLL_VRVOSG DtMergeDuplicateTextureVisitor : public osg::NodeVisitor
   {
   public:
      typedef DtOsgReferencedCollection<DtTextureCollection> TextureMap;

      DtMergeDuplicateTextureVisitor(
         TextureMap& textureMap,
         const std::string& parentFilePath,
         bool replaceTexturesWithLoadOnDemandImages,
         bool compressTextures,
         bool followProxyNodes);

      virtual void apply(osg::Geode& geode);

      virtual void apply(osg::Node& node);

      virtual void apply(osg::StateSet& stateset);

      virtual void apply(osg::ProxyNode& node);

      void clearTextures();


   protected:

      //Attempt to find a duplicate texture. It looks up the texture
      //Via the image in the map and returns a valid texture point to a new
      //Texture object to replace the original with.
      //If no duplicate texture is found the returned texture pointer is NULL.
      osg::ref_ptr<osg::Texture> findDuplicateTexture(osg::Texture* texture);

      
   protected:
      std::string myFilePath;
      TextureMap& myTextureCollection;
      bool myUnloadImageDataFlag;
      bool myCompressTextures;
      bool myProcessProxyNodes;
      int myTextureReplacementCount;
   };
}