CWE-ou-minkata/Sources/Plasma/PubUtilLib/plDrawable/plAccessSnapShot.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
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*==LICENSE==*/

#ifndef plAccessSnapShot_inc
#define plAccessSnapShot_inc

#include "plAccessVtxSpan.h"

// All functions and fields here (including constructor) are private,
// because the only valid user of this is the friend class plAccessGeometry.
// Use this only via plAccessGeometry.
class plAccessSnapShot : public plAccessVtxSpan
{
public:
    void            Destroy(); // Free up and reset to zero.

protected:

    uint16_t      fRefCnt;

    uint8_t*      fData;

    uint16_t      fChanSize[kNumValidChans];

    void            ICopyOldData(uint8_t* data, const uint16_t* const oldSizes, uint16_t oldStride, uint16_t newStride);
    uint16_t          IComputeStride() const;
    void            IRecordSizes(uint16_t sizes[]) const;
    uint32_t          ICheckAlloc(const plAccessVtxSpan& src, uint32_t chanMask, uint32_t chan, uint16_t chanSize);

    void            ISetupPointers(uint16_t newStride);

    void            SetupChannels(plAccessVtxSpan& dst) const;

    uint32_t          CopyTo(const plAccessVtxSpan& dst, uint32_t chanMask);
    uint32_t          CopyFrom(const plAccessVtxSpan& src, uint32_t chanMask);
    void            Release(); // Decrements refcnt, calls Destroy on zero
    void            Clear(); // Initialize to zeros

    void            IncRef() { fRefCnt++; }
    void            DecRef() { Release(); }

    plAccessSnapShot() : fRefCnt(0), fData(nil) { Clear(); }

    friend class plAccessGeometry;
};


#endif // plAccessSnapShot_inc