DtIndirectLimitTextureStrategy.h

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/******************************************************************************
** Copyright (c) 2021 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once
#include <vrvOsg/vrvOsg.h>

#include <vrvGraphicsUtils/DtVector2.h>

#include <vrvCore/DtVirtualBaseClassCreator.h>

#include <osg/ref_ptr>

#include <unordered_set>

namespace osg
{
   class Image;
}

namespace makVrv
{
   class DtDe;

   class DtIndirectLimitTextureStrategy;

   typedef DtVirtualBaseClassCreator<DtIndirectLimitTextureStrategy, const DtVector2<int>&> DtIndirectLimitTextureStrategyCreator;

   template <>
   inline const char* creatorTypeName<DtIndirectLimitTextureStrategy>(void) { return "DtIndirectLimitTextureStrategyCreator"; }

   class DtIndirectTextureLimitAdjustedMipMap
   {
   public:
      DtIndirectTextureLimitAdjustedMipMap(int start, int width, int height);

      DtIndirectTextureLimitAdjustedMipMap();
   public:
      int myMipLevelStart;
      int myStartMipMapWidth;
      int myStartMipMapHeight;
   };

   class DT_DLL_VRVOSG DtIndirectLimitTextureStrategy
   {
   public:
      friend DtIndirectLimitTextureStrategyCreator;

      virtual ~DtIndirectLimitTextureStrategy();

      DtIndirectLimitTextureStrategy() = delete;
      DtIndirectLimitTextureStrategy& operator=(const DtIndirectLimitTextureStrategy& rhs) = delete;
      DtIndirectLimitTextureStrategy(const DtIndirectLimitTextureStrategy& rhs) = delete;
   protected:
      DtIndirectLimitTextureStrategy(DtDe& de, const DtVector2<int>& limitTexturesResolution);
   public:
      virtual DtIndirectTextureLimitAdjustedMipMap adjustStartMipMapLevel(const osg::ref_ptr<osg::Image>& osgImage) const;

      virtual void excludeTexture(const std::string& textureFileAbsolutePath);

      virtual bool isExcluded(const std::string& textureFileAbsolutePath) const;

      virtual bool needsMaxTextureResolutionComputation(void) const;

   protected:
      virtual DtIndirectTextureLimitAdjustedMipMap adjustStartMipMapLevel(const osg::ref_ptr<osg::Image>& osgImage, const DtVector2<int>& limit) const;
   protected:
      DtDe& myDe;
      const DtVector2<int> myLimitTexturesResolution;

      std::unordered_set<std::string> myExcludedTextureFiles;
   };
}