LCOV - code coverage report
Current view: top level - svx/source/gallery2 - codec.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 70 0.0 %
Date: 2014-04-14 Functions: 0 5 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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             : 
      21             : #include <tools/stream.hxx>
      22             : #include <tools/zcodec.hxx>
      23             : #include <tools/debug.hxx>
      24             : #include "codec.hxx"
      25             : 
      26             : // - GalleryCodec -
      27             : 
      28             : 
      29           0 : GalleryCodec::GalleryCodec( SvStream& rIOStm ) :
      30           0 :     rStm( rIOStm )
      31             : {
      32           0 : }
      33             : 
      34           0 : GalleryCodec::~GalleryCodec()
      35             : {
      36           0 : }
      37             : 
      38           0 : sal_Bool GalleryCodec::IsCoded( SvStream& rStm, sal_uInt32& rVersion )
      39             : {
      40           0 :     const sal_uIntPtr   nPos = rStm.Tell();
      41             :     sal_Bool        bRet;
      42             :     sal_uInt8       cByte1, cByte2, cByte3, cByte4, cByte5, cByte6;
      43             : 
      44           0 :     rStm.ReadUChar( cByte1 ).ReadUChar( cByte2 ).ReadUChar( cByte3 ).ReadUChar( cByte4 ).ReadUChar( cByte5 ).ReadUChar( cByte6 );
      45             : 
      46           0 :     if ( cByte1 == 'S' && cByte2 == 'V' && cByte3 == 'R' && cByte4 == 'L' && cByte5 == 'E' && ( cByte6 == '1' || cByte6 == '2' ) )
      47             :     {
      48           0 :         rVersion = ( ( cByte6 == '1' ) ? 1 : 2 );
      49           0 :         bRet = sal_True;
      50             :     }
      51             :     else
      52             :     {
      53           0 :         rVersion = 0;
      54           0 :         bRet = sal_False;
      55             :     }
      56             : 
      57           0 :     rStm.Seek( nPos );
      58             : 
      59           0 :     return bRet;
      60             : }
      61             : 
      62           0 : void GalleryCodec::Write( SvStream& rStmToWrite )
      63             : {
      64             :     sal_uInt32 nPos, nCompSize;
      65             : 
      66           0 :     rStmToWrite.Seek( STREAM_SEEK_TO_END );
      67           0 :     const sal_uInt32 nSize = rStmToWrite.Tell();
      68           0 :     rStmToWrite.Seek( 0UL );
      69             : 
      70           0 :     rStm.WriteChar( 'S' ).WriteChar( 'V' ).WriteChar( 'R' ).WriteChar( 'L' ).WriteChar( 'E' ).WriteChar( '2' );
      71           0 :     rStm.WriteUInt32( nSize );
      72             : 
      73           0 :     nPos = rStm.Tell();
      74           0 :     rStm.SeekRel( 4UL );
      75             : 
      76           0 :     ZCodec aCodec;
      77           0 :     aCodec.BeginCompression();
      78           0 :     aCodec.Compress( rStmToWrite, rStm );
      79           0 :     aCodec.EndCompression();
      80             : 
      81           0 :     nCompSize = rStm.Tell() - nPos - 4UL;
      82           0 :     rStm.Seek( nPos );
      83           0 :     rStm.WriteUInt32( nCompSize );
      84           0 :     rStm.Seek( STREAM_SEEK_TO_END );
      85           0 : }
      86             : 
      87           0 : void GalleryCodec::Read( SvStream& rStmToRead )
      88             : {
      89           0 :     sal_uInt32 nVersion = 0;
      90             : 
      91           0 :     if( IsCoded( rStm, nVersion ) )
      92             :     {
      93             :         sal_uInt32  nCompressedSize, nUnCompressedSize;
      94             : 
      95           0 :         rStm.SeekRel( 6 );
      96           0 :         rStm.ReadUInt32( nUnCompressedSize ).ReadUInt32( nCompressedSize );
      97             : 
      98             :         // decompress
      99           0 :         if( 1 == nVersion )
     100             :         {
     101           0 :             sal_uInt8*   pCompressedBuffer = new sal_uInt8[ nCompressedSize ]; rStm.Read( pCompressedBuffer, nCompressedSize );
     102           0 :             sal_uInt8*  pInBuf = pCompressedBuffer;
     103           0 :             sal_uInt8*  pOutBuf = new sal_uInt8[ nUnCompressedSize ];
     104           0 :             sal_uInt8*  pTmpBuf = pOutBuf;
     105           0 :             sal_uInt8*  pLast = pOutBuf + nUnCompressedSize - 1;
     106           0 :             sal_uIntPtr   nIndex = 0UL, nCountByte, nRunByte;
     107           0 :             sal_Bool    bEndDecoding = sal_False;
     108             : 
     109           0 :             do
     110             :             {
     111           0 :                 nCountByte = *pInBuf++;
     112             : 
     113           0 :                 if ( !nCountByte )
     114             :                 {
     115           0 :                     nRunByte = *pInBuf++;
     116             : 
     117           0 :                     if ( nRunByte > 2 )
     118             :                     {
     119             :                         // filling absolutely
     120           0 :                         memcpy( &pTmpBuf[ nIndex ], pInBuf, nRunByte );
     121           0 :                         pInBuf += nRunByte;
     122           0 :                         nIndex += nRunByte;
     123             : 
     124             :                         // note WORD alignment
     125           0 :                         if ( nRunByte & 1 )
     126           0 :                             pInBuf++;
     127             :                     }
     128           0 :                     else if ( nRunByte == 1 )   // End of the image
     129           0 :                         bEndDecoding = sal_True;
     130             :                 }
     131             :                 else
     132             :                 {
     133           0 :                     const sal_uInt8 cVal = *pInBuf++;
     134             : 
     135           0 :                     memset( &pTmpBuf[ nIndex ], cVal, nCountByte );
     136           0 :                     nIndex += nCountByte;
     137             :                 }
     138             :             }
     139           0 :             while ( !bEndDecoding && ( pTmpBuf <= pLast ) );
     140             : 
     141           0 :                rStmToRead.Write( pOutBuf, nUnCompressedSize );
     142             : 
     143           0 :             delete[] pOutBuf;
     144           0 :             delete[] pCompressedBuffer;
     145             :         }
     146           0 :         else if( 2 == nVersion )
     147             :         {
     148           0 :             ZCodec aCodec;
     149             : 
     150           0 :             aCodec.BeginCompression();
     151           0 :             aCodec.Decompress( rStm, rStmToRead );
     152           0 :             aCodec.EndCompression();
     153             :         }
     154             :     }
     155           0 : }
     156             : 
     157             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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