/*==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/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

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 plVertCoder_inc
#define plVertCoder_inc

class hsStream;

class plVertCoder
{
public:
	enum {
		kPosition,
		kWeight,
		kUVW,
		kNumFloatFields = kUVW + 8
	};

protected:

	class FloatCode
	{
	public:
		hsScalar	fOffset;
		hsBool		fAllSame;
		UInt16		fCount;
	};

	FloatCode		fFloats[kNumFloatFields][3];

	class ByteCode
	{
	public:
		UInt16		fCount;
		UInt8		fVal;
		UInt8		fSame;
	};

	ByteCode		fColors[4];

	static UInt32	fCodedVerts;
	static UInt32	fCodedBytes;
	static UInt32	fRawBytes;
	static UInt32	fSkippedBytes;

	inline void ICountFloats(const UInt8* src, UInt16 maxCnt, const hsScalar quant, const UInt32 stride, hsScalar& lo, hsBool& allSame, UInt16& count);
	inline void IEncodeFloat(hsStream* s, const UInt32 vertsLeft, const int field, const int chan, const UInt8*& src, const UInt32 stride);
	inline void IDecodeFloat(hsStream* s, const int field, const int chan, UInt8*& dst, const UInt32 stride);

	inline void IEncodeNormal(hsStream* s, const UInt8*& src, const UInt32 stride);
	inline void IDecodeNormal(hsStream* s, UInt8*& dst, const UInt32 stride);

	inline void ICountBytes(const UInt32 vertsLeft, const UInt8* src, const UInt32 stride, UInt16& len, UInt8& same);
	inline void IEncodeByte(hsStream* s, const int chan, const UInt32 vertsLeft, const UInt8*& src, const UInt32 stride);
	inline void IDecodeByte(hsStream* s, const int chan, UInt8*& dst, const UInt32 stride);
	inline void IEncodeColor(hsStream* s, const UInt32 vertsLeft, const UInt8*& src, const UInt32 stride);
	inline void IDecodeColor(hsStream* s, UInt8*& dst, const UInt32 stride);

	inline void IEncode(hsStream* s, const UInt32 vertsLeft, const UInt8*& src, const UInt32 stride, const UInt8 format);
	inline void IDecode(hsStream* s, UInt8*& dst, const UInt32 stride, const UInt8 format);

public:
	plVertCoder();
	~plVertCoder();

	void Clear();

	void Read(hsStream* s, UInt8* dst, const UInt8 format, const UInt32 stride, const UInt16 numVerts);
	void Write(hsStream* s, const UInt8* src, const UInt8 format, const UInt32 stride, const UInt16 numVerts);


	static void ClearAverage() { fCodedVerts = 0; fCodedBytes = 0; fRawBytes = 0; fSkippedBytes = 0; }
	static UInt32 CodedBytes() { return fCodedBytes; }
	static UInt32 RawBytes() { return fRawBytes; }
	static UInt32 CodedVerts() { return fCodedVerts; }
	static float AverageCodedVertSize() { return fCodedVerts ? float(fCodedBytes) / float(fCodedVerts) : 0; }
	static float AverageRawVertSize() { return fCodedVerts ? float(fRawBytes) / float(fCodedVerts) : 0; }

	static UInt32 SkippedBytes() { return fSkippedBytes; }
	static void AddSkippedBytes(UInt32 f) { fSkippedBytes += f; }
};

#endif // plVertCoder_inc
