include/vrvOsg/DtMergeDuplicateTextureVisitor.h

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/******************************************************************************
** Copyright (c) 2008 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/
/******************************************************************************
** $RCSfile: DtMergeDuplicateTextureVisitor.h,v $ $Revision: 1.7 $ $State: Exp $
******************************************************************************/


#pragma once
#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOsgFileCache.h>
#include <osg/NodeVisitor>
#include <boost/unordered_map.hpp>
#include <vector>

namespace makVrv
{
   class DT_DLL_VRVOSG DtMergeDuplicateTextureVisitor : public osg::NodeVisitor
   {
   public:
      typedef boost::unordered_map<std::string,osg::ref_ptr<DtOsgFileCache::TextureCollection> > TextureMap;
      typedef std::vector<std::pair<std::string,DtOsgFileCache::TextureCollection* > > TextureList;

      DtMergeDuplicateTextureVisitor(
         TextureMap& textureMap,
         TextureList& textureList,
         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);

      void processTexture( osg::Texture &texture, const osg::Image* img );

   protected:
      std::string myFilePath;
      TextureMap& myTextureMapRef;
      TextureList& myTextureList;
      bool myUnloadImageDataFlag;
      bool myCompressTextures;
      bool myProcessProxyNodes;
   };
}