inputtilecontributionatpos.h

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/*
* Copyright 2015 Autodesk, Inc. All rights reserved.
* Use of this software is subject to the terms of the Autodesk license agreement and any attachments or Appendices thereto provided at the time of installation or download,
* or which otherwise accompanies this software in either electronic or hard copy form, or which is signed by you and accepted by Autodesk.
*/


// primary contact: GUAL - secondary contact: NOBODY
#ifndef GwNavGen_InputTileInfoGrid_H
#define GwNavGen_InputTileInfoGrid_H

#include "gwnavruntime/navmesh/navmeshtypes.h"
#include "gwnavgeneration/input/inputtileblob.h"
#include "gwnavgeneration/common/densegrid.h"
#include "gwnavgeneration/generator/generatorguidcompound.h"


namespace Kaim
{

class GeneratorSystem;
class GeneratorSectorBuilder;
class CellGenerator;

typedef Vec2i TilePos;

class InputTileContributionAtPos
{
    KY_DEFINE_NEW_DELETE_OPERATORS(MemStat_NavDataGen)
    friend class InputTileCache;

public:
    class InputTileInfo
    {
        KY_DEFINE_NEW_DELETE_OPERATORS(MemStat_NavDataGen)
    public:
        InputTileInfo() : m_sectorBuilder(KY_NULL), m_inputTileBlob(KY_NULL) {} // To make KyArray happy
        InputTileInfo(GeneratorSectorBuilder* sectorBuilder) : m_sectorBuilder(sectorBuilder), m_inputTileBlob(KY_NULL) {}
        InputCellBlob* GetInputCellBlob(const CellPos& cellPos) const
        {
            KY_ASSERT(m_inputTileBlob != KY_NULL);
            return m_inputTileBlob->GetInputCellBlob(cellPos);
        }
    public:
        GeneratorSectorBuilder* m_sectorBuilder;
        InputTileBlob* m_inputTileBlob;
    };

public:
    InputTileContributionAtPos(KyInt32 x, KyInt32 y) // counter intuitive constructor to match the DynamicGrid concept
        : m_tilePos(x, y) {}

    void Init(KyUInt32 inputTileSizeInNbCells);

    void AddCellContribution(const CellPos& cellPos, GeneratorSectorBuilder* sectorBuilder);

    const TilePos& GetTilePos()     const { return m_tilePos; }
    const CellBox& GetTileCellBox() const { return m_tileCellBox; }

    // Must be called after InputTileCache::Load(inputTileContributionAtPos) was called
    void GetInputCellBlobsAtCellPos(const CellPos& cellPos, KyArrayPOD<const InputCellBlob*>& inputCellBlob);
    KyUInt32 GetInputCellBlobsCountAtCellPos(const CellPos& cellPos);

    KyUInt32 GetContributingCellCount();

    void ClearInputTileBlobs();

private:
    TilePos m_tilePos;
    CellBox m_tileCellBox;
    KyArray<InputTileInfo> m_inputTileInfos;
    KyArray<KyArray<GeneratorSectorBuilder*> > m_contributingSectorRowMajorMatrix; // Matrix in m_tileCellBox
};


class InputTileCacheEntry
{
    KY_DEFINE_NEW_DELETE_OPERATORS(MemStat_NavDataGen)

public:
    InputTileCacheEntry() : m_sectorBuilder(KY_NULL) {}

    bool operator==(const InputTileCacheEntry& other)
    {
        return m_sectorBuilder == other.m_sectorBuilder
            && m_tilePos       == other.m_tilePos;
    }

public:
    GeneratorSectorBuilder* m_sectorBuilder;
    TilePos m_tilePos;
    Ptr<BlobHandler<InputTileBlob> > m_inputTileBlobHandler;
};


// InputTileCache allows to load InputTile from files.
// InputTileCache works as a least recently used cache for loaded InputTiles.
// InputTileCache is created on the stack at the beginning of GenerateSectors()
class InputTileCache
{
    KY_DEFINE_NEW_DELETE_OPERATORS(MemStat_NavDataGen)

public:
    InputTileCache(GeneratorSystem* sys, KyUInt32 memoryLimitInMegaBytes = 100)
        : m_sys(sys)
        , m_memoryLimitInMegaBytes(memoryLimitInMegaBytes)
        , m_currentMemoryUsageInMegaBytes(0)
    {}

    KyResult Load(InputTileContributionAtPos& inputTileContributionAtPos);

    void UnloadAll();

private:
    InputTileBlob* Load(GeneratorSectorBuilder* sectorBuilder, const TilePos& tilePos);
    
    //void UnloadLeastRecentlyUsed();
    //void Unload(InputTileInfo& inputTileInfo);

public:
    GeneratorSystem* m_sys;
    KyUInt32 m_memoryLimitInMegaBytes;
    KyUInt32 m_currentMemoryUsageInMegaBytes;

    KyArray<InputTileCacheEntry> m_entries;
};


}


#endif