xref: /aoo41x/main/svtools/source/filter/igif/decode.hxx (revision 01aa44aa)

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
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#ifndef _DECODE_HXX
#define _DECODE_HXX

#ifndef _BMPACC_HXX
#include <vcl/bmpacc.hxx>
#endif

struct GIFLZWTableEntry;

class GIFLZWDecompressor
{
	GIFLZWTableEntry*	pTable;
	HPBYTE				pOutBuf;
	HPBYTE				pOutBufData;
	HPBYTE				pBlockBuf;
	sal_uLong				nInputBitsBuf;
	sal_uInt16				nTableSize;
	sal_uInt16				nClearCode;
	sal_uInt16				nEOICode;
	sal_uInt16				nCodeSize;
	sal_uInt16				nOldCode;
	sal_uInt16				nOutBufDataLen;
	sal_uInt16				nInputBitsBufSize;
	sal_Bool				bEOIFound;
	sal_uInt8				nDataSize;
	sal_uInt8				nBlockBufSize;
	sal_uInt8				nBlockBufPos;

	void				AddToTable(sal_uInt16 nPrevCode, sal_uInt16 nCodeFirstData);
	sal_Bool				ProcessOneCode();


public:

						GIFLZWDecompressor( sal_uInt8 cDataSize );
						~GIFLZWDecompressor();

	HPBYTE				DecompressBlock( HPBYTE pSrc, sal_uInt8 cBufSize, sal_uLong& rCount, sal_Bool& rEOI );
};

#endif