vcl/source/filter/wmf/wmf.cxx

   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 #include "winmtf.hxx"
  21 #include "emfwr.hxx"
  22 #include "wmfwr.hxx"
  23 #include <vcl/wmf.hxx>
  24 #include <vcl/gdimetafiletools.hxx>
  25 #include <comphelper/scopeguard.hxx>
  26
  27 bool ConvertWMFToGDIMetaFile( SvStream & rStreamWMF, GDIMetaFile & rGDIMetaFile, FilterConfigItem* pConfigItem, WMF_EXTERNALHEADER *pExtHeader )
  28 {
  29     sal_uInt32 nMetaType;
  30     sal_uInt32 nOrgPos = rStreamWMF.Tell();
  31     SvStreamEndian nOrigNumberFormat = rStreamWMF.GetEndian();
  32     rStreamWMF.SetEndian( SvStreamEndian::LITTLE );
  33     rStreamWMF.Seek( 0x28 );
  34     rStreamWMF.ReadUInt32( nMetaType );
  35     rStreamWMF.Seek( nOrgPos );
  36     if ( nMetaType == 0x464d4520 )
  37     {
  38         if ( !EnhWMFReader( rStreamWMF, rGDIMetaFile, pConfigItem ).ReadEnhWMF() )
  39             rStreamWMF.SetError( SVSTREAM_FILEFORMAT_ERROR );
  40     }
  41     else
  42     {
  43         WMFReader( rStreamWMF, rGDIMetaFile, pConfigItem, pExtHeader ).ReadWMF( );
  44     }
  45
  46 #ifdef DBG_UTIL
  47     // #i123216# allow a look at CheckSum and ByteSize for debugging
  48     SAL_INFO("vcl.emf", "\t\t\tchecksum: 0x" << std::hex << rGDIMetaFile.GetChecksum() << std::dec);
  49     SAL_INFO("vcl.emf", "\t\t\tsize: " << rGDIMetaFile.GetSizeBytes());
  50 #endif
  51
  52     rStreamWMF.SetEndian( nOrigNumberFormat );
  53     return !rStreamWMF.GetError();
  54 }
  55
  56 bool ReadWindowMetafile( SvStream& rStream, GDIMetaFile& rMTF )
  57 {
  58     sal_uInt32 nMetaType(0);
  59     sal_uInt32 nOrgPos = rStream.Tell();
  60
  61     SvStreamEndian nOrigNumberFormat = rStream.GetEndian();
  62     rStream.SetEndian( SvStreamEndian::LITTLE );
  63     //exception-safe reset nOrigNumberFormat at end of scope
  64     const ::comphelper::ScopeGuard aScopeGuard( [&rStream, nOrigNumberFormat] () { rStream.SetEndian( nOrigNumberFormat ); } );
  65
  66     rStream.Seek( 0x28 );
  67     rStream.ReadUInt32( nMetaType );
  68     rStream.Seek( nOrgPos );
  69
  70     if (!rStream.good())
  71         return false;
  72
  73     if ( nMetaType == 0x464d4520 )
  74     {
  75         if ( !EnhWMFReader( rStream, rMTF, nullptr ).ReadEnhWMF() )
  76             rStream.SetError( SVSTREAM_FILEFORMAT_ERROR );
  77     }
  78     else
  79     {
  80         WMFReader( rStream, rMTF, nullptr ).ReadWMF();
  81     }
  82
  83     return rStream.good();
  84 }
  85
  86 bool ConvertGDIMetaFileToWMF( const GDIMetaFile & rMTF, SvStream & rTargetStream,
  87                               FilterConfigItem* pConfigItem, bool bPlaceable)
  88 {
  89     WMFWriter aWMFWriter;
  90     GDIMetaFile aGdiMetaFile(rMTF);
  91
  92     if(usesClipActions(aGdiMetaFile))
  93     {
  94         // #i121267# It is necessary to prepare the metafile since the export does *not* support
  95         // clip regions. This tooling method clips the geometry content of the metafile internally
  96         // against its own clip regions, so that the export is safe to ignore clip regions
  97         clipMetafileContentAgainstOwnRegions(aGdiMetaFile);
  98     }
  99
 100     return aWMFWriter.WriteWMF( aGdiMetaFile, rTargetStream, pConfigItem, bPlaceable );
 101 }
 102
 103 bool ConvertGDIMetaFileToEMF(const GDIMetaFile & rMTF, SvStream & rTargetStream)
 104 {
 105     EMFWriter aEMFWriter(rTargetStream);
 106     GDIMetaFile aGdiMetaFile(rMTF);
 107
 108     if(usesClipActions(aGdiMetaFile))
 109     {
 110         // #i121267# It is necessary to prepare the metafile since the export does *not* support
 111         // clip regions. This tooling method clips the geometry content of the metafile internally
 112         // against its own clip regions, so that the export is safe to ignore clip regions
 113         clipMetafileContentAgainstOwnRegions(aGdiMetaFile);
 114     }
 115
 116     return aEMFWriter.WriteEMF(aGdiMetaFile);
 117 }
 118
 119 bool WriteWindowMetafileBits( SvStream& rStream, const GDIMetaFile& rMTF )
 120 {
 121     return WMFWriter().WriteWMF( rMTF, rStream, nullptr, false );
 122 }
 123
 124 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */