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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_VCL_SOURCE_FILTER_IGIF_DECODE_HXX
#define INCLUDED_VCL_SOURCE_FILTER_IGIF_DECODE_HXX
#include <vcl/bitmapaccess.hxx>
#include <array>
#include <memory>
struct GIFLZWTableEntry;
class GIFLZWDecompressor
{
std::unique_ptr<GIFLZWTableEntry[]>
pTable;
std::array<sal_uInt8, 4096>
pOutBuf;
sal_uInt8* pOutBufData;
sal_uInt8* pBlockBuf;
sal_uLong nInputBitsBuf;
bool bEOIFound;
sal_uInt8 const nDataSize;
sal_uInt8 nBlockBufSize;
sal_uInt8 nBlockBufPos;
sal_uInt16 const nClearCode;
sal_uInt16 const nEOICode;
sal_uInt16 nTableSize;
sal_uInt16 nCodeSize;
sal_uInt16 nOldCode;
sal_uInt16 nOutBufDataLen;
sal_uInt16 nInputBitsBufSize;
bool AddToTable(sal_uInt16 nPrevCode, sal_uInt16 nCodeFirstData);
bool ProcessOneCode();
GIFLZWDecompressor(const GIFLZWDecompressor&) = delete;
GIFLZWDecompressor& operator=(const GIFLZWDecompressor&) = delete;
public:
explicit GIFLZWDecompressor( sal_uInt8 cDataSize );
~GIFLZWDecompressor();
sal_uInt8* DecompressBlock( sal_uInt8* pSrc, sal_uInt8 cBufSize, sal_uLong& rCount, bool& rEOI );
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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