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) 2000-2012 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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