vcl/source/filter/igif/decode.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_SOURCE_FILTER_IGIF_DECODE_HXX
  21 #define INCLUDED_VCL_SOURCE_FILTER_IGIF_DECODE_HXX
  22
  23 #include <vcl/bmpacc.hxx>
  24
  25 struct GIFLZWTableEntry;
  26
  27 class GIFLZWDecompressor
  28 {
  29     GIFLZWTableEntry*   pTable;
  30     HPBYTE              pOutBuf;
  31     HPBYTE              pOutBufData;
  32     HPBYTE              pBlockBuf;
  33     sal_uLong               nInputBitsBuf;
  34     sal_uInt16              nTableSize;
  35     sal_uInt16              nClearCode;
  36     sal_uInt16              nEOICode;
  37     sal_uInt16              nCodeSize;
  38     sal_uInt16              nOldCode;
  39     sal_uInt16              nOutBufDataLen;
  40     sal_uInt16              nInputBitsBufSize;
  41     bool                bEOIFound;
  42     sal_uInt8               nDataSize;
  43     sal_uInt8               nBlockBufSize;
  44     sal_uInt8               nBlockBufPos;
  45
  46     bool                AddToTable(sal_uInt16 nPrevCode, sal_uInt16 nCodeFirstData);
  47     bool                ProcessOneCode();
  48
  49 public:
  50
  51                         GIFLZWDecompressor( sal_uInt8 cDataSize );
  52                         ~GIFLZWDecompressor();
  53
  54     HPBYTE              DecompressBlock( HPBYTE pSrc, sal_uInt8 cBufSize, sal_uLong& rCount, bool& rEOI );
  55 };
  56
  57 #endif
  58
  59 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */