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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==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 fRefCnt;
UInt8* fData;
UInt16 fChanSize[kNumValidChans];
void ICopyOldData(UInt8* data, const UInt16* const oldSizes, UInt16 oldStride, UInt16 newStride);
UInt16 IComputeStride() const;
void IRecordSizes(UInt16 sizes[]) const;
UInt32 ICheckAlloc(const plAccessVtxSpan& src, UInt32 chanMask, UInt32 chan, UInt16 chanSize);
void ISetupPointers(UInt16 newStride);
void SetupChannels(plAccessVtxSpan& dst) const;
UInt32 CopyTo(const plAccessVtxSpan& dst, UInt32 chanMask);
UInt32 CopyFrom(const plAccessVtxSpan& src, UInt32 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