vcl/source/gdi/gfxlink.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 <sal/log.hxx>
  21 #include <tools/stream.hxx>
  22 #include <tools/vcompat.hxx>
  23 #include <utility>
  24 #include <vcl/graph.hxx>
  25 #include <vcl/gfxlink.hxx>
  26 #include <vcl/graphicfilter.hxx>
  27 #include <memory>
  28 #include <o3tl/hash_combine.hxx>
  29
  30 GfxLink::GfxLink()
  31     : meType(GfxLinkType::NONE)
  32     , mnUserId(0)
  33     , maHash(0)
  34     , mbPrefMapModeValid(false)
  35     , mbPrefSizeValid(false)
  36 {
  37 }
  38
  39 GfxLink::GfxLink(BinaryDataContainer aDataConainer, GfxLinkType nType)
  40     : meType(nType)
  41     , mnUserId(0)
  42     , maDataContainer(std::move(aDataConainer))
  43     , maHash(0)
  44     , mbPrefMapModeValid(false)
  45     , mbPrefSizeValid(false)
  46 {
  47 }
  48
  49 size_t GfxLink::GetHash() const
  50 {
  51     if (!maHash)
  52     {
  53         std::size_t seed = maDataContainer.calculateHash();
  54         o3tl::hash_combine(seed, meType);
  55         maHash = seed;
  56     }
  57     return maHash;
  58 }
  59
  60 bool GfxLink::operator==( const GfxLink& rGfxLink ) const
  61 {
  62     if (GetDataSize() != rGfxLink.GetDataSize()
  63         || meType != rGfxLink.meType
  64         || GetHash() != rGfxLink.GetHash())
  65         return false;
  66
  67     const sal_uInt8* pSource = GetData();
  68     const sal_uInt8* pDestination = rGfxLink.GetData();
  69
  70     if (pSource == pDestination)
  71         return true;
  72
  73     sal_uInt32 nSourceSize = GetDataSize();
  74     sal_uInt32 nDestSize = rGfxLink.GetDataSize();
  75
  76     if (pSource && pDestination && (nSourceSize == nDestSize))
  77         return memcmp(pSource, pDestination, nSourceSize) == 0;
  78
  79     return false;
  80 }
  81
  82 bool GfxLink::IsNative() const
  83 {
  84     return meType >= GfxLinkType::NativeFirst && meType <= GfxLinkType::NativeLast;
  85 }
  86
  87 const sal_uInt8* GfxLink::GetData() const
  88 {
  89     return maDataContainer.getData();
  90 }
  91
  92 void GfxLink::SetPrefSize( const Size& rPrefSize )
  93 {
  94     maPrefSize = rPrefSize;
  95     mbPrefSizeValid = true;
  96 }
  97
  98 void GfxLink::SetPrefMapMode( const MapMode& rPrefMapMode )
  99 {
 100     maPrefMapMode = rPrefMapMode;
 101     mbPrefMapModeValid = true;
 102 }
 103
 104 bool GfxLink::LoadNative( Graphic& rGraphic ) const
 105 {
 106     bool bRet = false;
 107
 108     if (IsNative() && !maDataContainer.isEmpty())
 109     {
 110         const sal_uInt8* pData = GetData();
 111         if (pData)
 112         {
 113             SvMemoryStream aMemoryStream(const_cast<sal_uInt8*>(pData), GetDataSize(), StreamMode::READ | StreamMode::WRITE);
 114             OUString aShortName;
 115
 116             switch (meType)
 117             {
 118                 case GfxLinkType::NativeGif: aShortName = GIF_SHORTNAME; break;
 119                 case GfxLinkType::NativeJpg: aShortName = JPG_SHORTNAME; break;
 120                 case GfxLinkType::NativePng: aShortName = PNG_SHORTNAME; break;
 121                 case GfxLinkType::NativeTif: aShortName = TIF_SHORTNAME; break;
 122                 case GfxLinkType::NativeWmf: aShortName = WMF_SHORTNAME; break;
 123                 case GfxLinkType::NativeMet: aShortName = MET_SHORTNAME; break;
 124                 case GfxLinkType::NativePct: aShortName = PCT_SHORTNAME; break;
 125                 case GfxLinkType::NativeSvg: aShortName = SVG_SHORTNAME; break;
 126                 case GfxLinkType::NativeBmp: aShortName = BMP_SHORTNAME; break;
 127                 case GfxLinkType::NativePdf: aShortName = PDF_SHORTNAME; break;
 128                 case GfxLinkType::NativeWebp: aShortName = WEBP_SHORTNAME; break;
 129                 default: break;
 130             }
 131             if (!aShortName.isEmpty())
 132             {
 133                 GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
 134                 sal_uInt16 nFormat = rFilter.GetImportFormatNumberForShortName(aShortName);
 135                 ErrCode nResult = rFilter.ImportGraphic(rGraphic, u"", aMemoryStream, nFormat);
 136                 if (nResult == ERRCODE_NONE)
 137                     bRet = true;
 138             }
 139         }
 140     }
 141
 142     return bRet;
 143 }
 144
 145 bool GfxLink::ExportNative( SvStream& rOStream ) const
 146 {
 147     if( GetDataSize() )
 148     {
 149         auto pData = GetData();
 150         if (pData)
 151             rOStream.WriteBytes(pData, GetDataSize());
 152     }
 153
 154     return ( rOStream.GetError() == ERRCODE_NONE );
 155 }
 156
 157 bool GfxLink::IsEMF() const
 158 {
 159     const sal_uInt8* pGraphicAry = GetData();
 160     if ((GetType() == GfxLinkType::NativeWmf) && pGraphicAry && (GetDataSize() > 0x2c))
 161     {
 162         // check the magic number
 163         if ((pGraphicAry[0x28] == 0x20) && (pGraphicAry[0x29] == 0x45)
 164             && (pGraphicAry[0x2a] == 0x4d) && (pGraphicAry[0x2b] == 0x46))
 165         {
 166             //emf detected
 167             return true;
 168         }
 169     }
 170     return false;
 171 }
 172
 173 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */