OgrePageStrategy.h

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/*
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This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2011 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
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all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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*/

#ifndef __Ogre_PageStrategy_H__
#define __Ogre_PageStrategy_H__

#include "OgrePagingPrerequisites.h"


namespace Ogre
{


    class _OgrePagingExport PageStrategyData : public PageAlloc
    {
    public:
        PageStrategyData() {}
        virtual ~PageStrategyData() {}

        virtual bool load(StreamSerialiser& stream) = 0;
        virtual void save(StreamSerialiser& stream) = 0;


    };


    class _OgrePagingExport PageStrategy : public PageAlloc
    {
    protected:
        String mName;
        PageManager* mManager;
    public:
        PageStrategy(const String& name, PageManager* manager)
            : mName(name), mManager(manager)
        {

        }

        virtual ~PageStrategy() {}

        const String& getName() const { return mName; }
        PageManager* getManager() const { return mManager; }

        virtual void frameStart(Real timeSinceLastFrame, PagedWorldSection* section) {}
        virtual void frameEnd(Real timeElapsed, PagedWorldSection* section) {}
        virtual void notifyCamera(Camera* cam, PagedWorldSection* section) {}

        virtual PageStrategyData* createData() = 0;

        virtual void destroyData(PageStrategyData* d) = 0;

        virtual void updateDebugDisplay(Page* p, SceneNode* sn) = 0;

        virtual PageID getPageID(const Vector3& worldPos, PagedWorldSection* section) = 0;
    };

}

#endif