vcl/source/filter/egif/giflzwc.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 #pragma once
  21
  22 #include <vcl/mapmod.hxx>
  23
  24
  25 class   GIFImageDataOutputStream;
  26 struct  GIFLZWCTreeNode;
  27
  28
  29 class GIFLZWCompressor
  30 {
  31 private:
  32
  33     std::unique_ptr<GIFImageDataOutputStream> pIDOS;
  34     std::unique_ptr<GIFLZWCTreeNode[]> pTable;
  35     GIFLZWCTreeNode*            pPrefix;
  36     sal_uInt16                  nDataSize;
  37     sal_uInt16                  nClearCode;
  38     sal_uInt16                  nEOICode;
  39     sal_uInt16                  nTableSize;
  40     sal_uInt16                  nCodeSize;
  41
  42 public:
  43
  44                                 GIFLZWCompressor();
  45                                 ~GIFLZWCompressor();
  46
  47     void                        StartCompression( SvStream& rGIF, sal_uInt16 nPixelSize );
  48     void                        Compress(sal_uInt8* pSrc, sal_uInt32 nSize);
  49     void                        EndCompression();
  50 };
  51
  52 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */