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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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#ifndef plAccessSnapShot_inc
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#define plAccessSnapShot_inc
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#include "plAccessVtxSpan.h"
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// All functions and fields here (including constructor) are private,
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// because the only valid user of this is the friend class plAccessGeometry.
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// Use this only via plAccessGeometry.
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class plAccessSnapShot : public plAccessVtxSpan
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{
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public:
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void Destroy(); // Free up and reset to zero.
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protected:
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UInt16 fRefCnt;
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UInt8* fData;
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UInt16 fChanSize[kNumValidChans];
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void ICopyOldData(UInt8* data, const UInt16* const oldSizes, UInt16 oldStride, UInt16 newStride);
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UInt16 IComputeStride() const;
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void IRecordSizes(UInt16 sizes[]) const;
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UInt32 ICheckAlloc(const plAccessVtxSpan& src, UInt32 chanMask, UInt32 chan, UInt16 chanSize);
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void ISetupPointers(UInt16 newStride);
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void SetupChannels(plAccessVtxSpan& dst) const;
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UInt32 CopyTo(const plAccessVtxSpan& dst, UInt32 chanMask);
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UInt32 CopyFrom(const plAccessVtxSpan& src, UInt32 chanMask);
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void Release(); // Decrements refcnt, calls Destroy on zero
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void Clear(); // Initialize to zeros
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void IncRef() { fRefCnt++; }
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void DecRef() { Release(); }
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plAccessSnapShot() : fRefCnt(0), fData(nil) { Clear(); }
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friend class plAccessGeometry;
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};
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#endif // plAccessSnapShot_inc
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