vcl/source/gdi/lineinfo.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 <tools/stream.hxx>
  21 #include <tools/vcompat.hxx>
  22 #include <vcl/lineinfo.hxx>
  23 #include <basegfx/polygon/b2dpolypolygon.hxx>
  24 #include <basegfx/polygon/b2dpolygontools.hxx>
  25 #include <basegfx/polygon/b2dlinegeometry.hxx>
  26 #include <numeric>
  27
  28
  29 ImplLineInfo::ImplLineInfo()
  30     : mnWidth(0)
  31     , mnDashLen(0)
  32     , mnDotLen(0)
  33     , mnDistance(0)
  34     , meLineJoin(basegfx::B2DLineJoin::Round)
  35     , meLineCap(css::drawing::LineCap_BUTT)
  36     , meStyle(LineStyle::Solid)
  37     , mnDashCount(0)
  38     , mnDotCount(0)
  39 {
  40 }
  41
  42 inline bool ImplLineInfo::operator==( const ImplLineInfo& rB ) const
  43 {
  44     return(meStyle == rB.meStyle
  45         && mnWidth == rB.mnWidth
  46         && mnDashCount == rB.mnDashCount
  47         && mnDashLen == rB.mnDashLen
  48         && mnDotCount == rB.mnDotCount
  49         && mnDotLen == rB.mnDotLen
  50         && mnDistance == rB.mnDistance
  51         && meLineJoin == rB.meLineJoin
  52         && meLineCap == rB.meLineCap);
  53 }
  54
  55
  56 LineInfo::LineInfo( LineStyle eStyle, double nWidth ) : mpImplLineInfo()
  57 {
  58     mpImplLineInfo->meStyle = eStyle;
  59     mpImplLineInfo->mnWidth = nWidth;
  60 }
  61
  62 LineInfo::LineInfo( const LineInfo& ) = default;
  63
  64 LineInfo::LineInfo( LineInfo&& ) = default;
  65
  66 LineInfo::~LineInfo() = default;
  67
  68 LineInfo& LineInfo::operator=( const LineInfo& ) = default;
  69
  70 LineInfo& LineInfo::operator=( LineInfo&& ) = default;
  71
  72 bool LineInfo::operator==( const LineInfo& rLineInfo ) const
  73 {
  74     return mpImplLineInfo == rLineInfo.mpImplLineInfo;
  75 }
  76
  77 void LineInfo::SetStyle( LineStyle eStyle )
  78 {
  79     mpImplLineInfo->meStyle = eStyle;
  80 }
  81
  82 void LineInfo::SetWidth( double nWidth )
  83 {
  84     mpImplLineInfo->mnWidth = nWidth;
  85 }
  86
  87 void LineInfo::SetDashCount( sal_uInt16 nDashCount )
  88 {
  89     mpImplLineInfo->mnDashCount = nDashCount;
  90 }
  91
  92 void LineInfo::SetDashLen( double nDashLen )
  93 {
  94     mpImplLineInfo->mnDashLen = nDashLen;
  95 }
  96
  97 void LineInfo::SetDotCount( sal_uInt16 nDotCount )
  98 {
  99     mpImplLineInfo->mnDotCount = nDotCount;
 100 }
 101
 102 void LineInfo::SetDotLen( double nDotLen )
 103 {
 104     mpImplLineInfo->mnDotLen = nDotLen;
 105 }
 106
 107 void LineInfo::SetDistance( double nDistance )
 108 {
 109     mpImplLineInfo->mnDistance = nDistance;
 110 }
 111
 112 void LineInfo::SetLineJoin(basegfx::B2DLineJoin eLineJoin)
 113 {
 114     mpImplLineInfo->meLineJoin = eLineJoin;
 115 }
 116
 117 void LineInfo::SetLineCap(css::drawing::LineCap eLineCap)
 118 {
 119     mpImplLineInfo->meLineCap = eLineCap;
 120 }
 121
 122 bool LineInfo::IsDefault() const
 123 {
 124     return( !mpImplLineInfo->mnWidth
 125         && ( LineStyle::Solid == mpImplLineInfo->meStyle )
 126         && ( css::drawing::LineCap_BUTT == mpImplLineInfo->meLineCap));
 127 }
 128
 129 SvStream& ReadLineInfo( SvStream& rIStm, LineInfo& rLineInfo )
 130 {
 131     VersionCompatRead aCompat( rIStm );
 132     sal_uInt16          nTmp16(0);
 133     sal_Int32       nTmp32(0);
 134
 135     rIStm.ReadUInt16( nTmp16 );
 136     rLineInfo.mpImplLineInfo->meStyle = static_cast<LineStyle>(nTmp16);
 137     rIStm.ReadInt32( nTmp32 );
 138     rLineInfo.mpImplLineInfo->mnWidth = nTmp32;
 139
 140     if( aCompat.GetVersion() >= 2 )
 141     {
 142         // version 2
 143         rIStm.ReadUInt16( rLineInfo.mpImplLineInfo->mnDashCount ).ReadInt32( nTmp32 );
 144         rLineInfo.mpImplLineInfo->mnDashLen = nTmp32;
 145         rIStm.ReadUInt16( rLineInfo.mpImplLineInfo->mnDotCount ).ReadInt32( nTmp32 );
 146         rLineInfo.mpImplLineInfo->mnDotLen = nTmp32;
 147         rIStm.ReadInt32( nTmp32 );
 148         rLineInfo.mpImplLineInfo->mnDistance = nTmp32;
 149     }
 150
 151     if( aCompat.GetVersion() >= 3 )
 152     {
 153         // version 3
 154         rIStm.ReadUInt16( nTmp16 );
 155         rLineInfo.mpImplLineInfo->meLineJoin = static_cast<basegfx::B2DLineJoin>(nTmp16);
 156     }
 157
 158     if( aCompat.GetVersion() >= 4 )
 159     {
 160         // version 4
 161         rIStm.ReadUInt16( nTmp16 );
 162         rLineInfo.mpImplLineInfo->meLineCap = static_cast<css::drawing::LineCap>(nTmp16);
 163     }
 164
 165     if( aCompat.GetVersion() >= 5 )
 166     {
 167         // version 5
 168         rIStm.ReadDouble( rLineInfo.mpImplLineInfo->mnWidth );
 169         rIStm.ReadDouble( rLineInfo.mpImplLineInfo->mnDashLen );
 170         rIStm.ReadDouble( rLineInfo.mpImplLineInfo->mnDotLen );
 171         rIStm.ReadDouble( rLineInfo.mpImplLineInfo->mnDistance );
 172     }
 173
 174     return rIStm;
 175 }
 176
 177 SvStream& WriteLineInfo( SvStream& rOStm, const LineInfo& rLineInfo )
 178 {
 179     VersionCompatWrite aCompat( rOStm, 5 );
 180
 181     // version 1
 182     rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meStyle) )
 183          .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnWidth ));
 184
 185     // since version2
 186     rOStm.WriteUInt16( rLineInfo.mpImplLineInfo->mnDashCount )
 187          .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDashLen ));
 188     rOStm.WriteUInt16( rLineInfo.mpImplLineInfo->mnDotCount )
 189          .WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDotLen ));
 190     rOStm.WriteInt32( basegfx::fround( rLineInfo.mpImplLineInfo->mnDistance ));
 191
 192     // since version3
 193     rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meLineJoin) );
 194
 195     // since version4
 196     rOStm.WriteUInt16( static_cast<sal_uInt16>(rLineInfo.mpImplLineInfo->meLineCap) );
 197
 198     // since version5
 199     rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnWidth );
 200     rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDashLen );
 201     rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDotLen );
 202     rOStm.WriteDouble( rLineInfo.mpImplLineInfo->mnDistance );
 203
 204     return rOStm;
 205 }
 206
 207 void LineInfo::applyToB2DPolyPolygon(
 208     basegfx::B2DPolyPolygon& io_rLinePolyPolygon,
 209     basegfx::B2DPolyPolygon& o_rFillPolyPolygon) const
 210 {
 211     o_rFillPolyPolygon.clear();
 212
 213     if(!io_rLinePolyPolygon.count())
 214         return;
 215
 216     if(LineStyle::Dash == GetStyle())
 217     {
 218         ::std::vector< double > fDotDashArray;
 219         const double fDashLen(GetDashLen());
 220         const double fDotLen(GetDotLen());
 221         const double fDistance(GetDistance());
 222
 223         for(sal_uInt16 a(0); a < GetDashCount(); a++)
 224         {
 225             fDotDashArray.push_back(fDashLen);
 226             fDotDashArray.push_back(fDistance);
 227         }
 228
 229         for(sal_uInt16 b(0); b < GetDotCount(); b++)
 230         {
 231             fDotDashArray.push_back(fDotLen);
 232             fDotDashArray.push_back(fDistance);
 233         }
 234
 235         const double fAccumulated(::std::accumulate(fDotDashArray.begin(), fDotDashArray.end(), 0.0));
 236
 237         if(fAccumulated > 0.0)
 238         {
 239             basegfx::B2DPolyPolygon aResult;
 240
 241             for(auto const& rPolygon : io_rLinePolyPolygon)
 242             {
 243                 basegfx::B2DPolyPolygon aLineTarget;
 244                 basegfx::utils::applyLineDashing(
 245                     rPolygon,
 246                     fDotDashArray,
 247                     &aLineTarget);
 248                 aResult.append(aLineTarget);
 249             }
 250
 251             io_rLinePolyPolygon = aResult;
 252         }
 253     }
 254
 255     if(!(GetWidth() > 1 && io_rLinePolyPolygon.count()))
 256         return;
 257
 258     const double fHalfLineWidth((GetWidth() * 0.5) + 0.5);
 259
 260     for(auto const& rPolygon : io_rLinePolyPolygon)
 261     {
 262         o_rFillPolyPolygon.append(basegfx::utils::createAreaGeometry(
 263             rPolygon,
 264             fHalfLineWidth,
 265             GetLineJoin(),
 266             GetLineCap()));
 267     }
 268
 269     io_rLinePolyPolygon.clear();
 270 }
 271
 272 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */