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diff --git a/vcl/source/outdev/line.cxx b/vcl/source/outdev/line.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cassert>
+#include <numeric>
+
+#include <vcl/gdimtf.hxx>
+#include <vcl/lineinfo.hxx>
+#include <vcl/metaact.hxx>
+#include <vcl/outdev.hxx>
+#include <vcl/virdev.hxx>
+
+#include <salgdi.hxx>
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/polygon/b2dlinegeometry.hxx>
+
+void OutputDevice::DrawLine( const Point& rStartPt, const Point& rEndPt,
+ const LineInfo& rLineInfo )
+{
+ assert(!is_double_buffered_window());
+
+ if ( rLineInfo.IsDefault() )
+ {
+ DrawLine( rStartPt, rEndPt );
+ return;
+ }
+
+ if ( mpMetaFile )
+ mpMetaFile->AddAction( new MetaLineAction( rStartPt, rEndPt, rLineInfo ) );
+
+ if ( !IsDeviceOutputNecessary() || !mbLineColor || ( LineStyle::NONE == rLineInfo.GetStyle() ) || ImplIsRecordLayout() )
+ return;
+
+ if( !mpGraphics && !AcquireGraphics() )
+ return;
+
+ if ( mbInitClipRegion )
+ InitClipRegion();
+
+ if ( mbOutputClipped )
+ return;
+
+ const Point aStartPt( ImplLogicToDevicePixel( rStartPt ) );
+ const Point aEndPt( ImplLogicToDevicePixel( rEndPt ) );
+ const LineInfo aInfo( ImplLogicToDevicePixel( rLineInfo ) );
+ const bool bDashUsed(LineStyle::Dash == aInfo.GetStyle());
+ const bool bLineWidthUsed(aInfo.GetWidth() > 1);
+
+ if ( mbInitLineColor )
+ InitLineColor();
+
+ if(bDashUsed || bLineWidthUsed)
+ {
+ basegfx::B2DPolygon aLinePolygon;
+ aLinePolygon.append(basegfx::B2DPoint(aStartPt.X(), aStartPt.Y()));
+ aLinePolygon.append(basegfx::B2DPoint(aEndPt.X(), aEndPt.Y()));
+
+ drawLine( basegfx::B2DPolyPolygon(aLinePolygon), aInfo );
+ }
+ else
+ {
+ mpGraphics->DrawLine( aStartPt.X(), aStartPt.Y(), aEndPt.X(), aEndPt.Y(), this );
+ }
+
+ if( mpAlphaVDev )
+ mpAlphaVDev->DrawLine( rStartPt, rEndPt, rLineInfo );
+}
+
+void OutputDevice::DrawLine( const Point& rStartPt, const Point& rEndPt )
+{
+ assert(!is_double_buffered_window());
+
+ if ( mpMetaFile )
+ mpMetaFile->AddAction( new MetaLineAction( rStartPt, rEndPt ) );
+
+ if ( !IsDeviceOutputNecessary() || !mbLineColor || ImplIsRecordLayout() )
+ return;
+
+ if ( !mpGraphics && !AcquireGraphics() )
+ return;
+
+ if ( mbInitClipRegion )
+ InitClipRegion();
+
+ if ( mbOutputClipped )
+ return;
+
+ if ( mbInitLineColor )
+ InitLineColor();
+
+ // #i101598# support AA and snap for lines, too
+ if((mnAntialiasing & AntialiasingFlags::EnableB2dDraw)
+ && mpGraphics->supportsOperation(OutDevSupportType::B2DDraw)
+ && RasterOp::OverPaint == GetRasterOp()
+ && IsLineColor())
+ {
+ // at least transform with double precision to device coordinates; this will
+ // avoid pixel snap of single, appended lines
+ const basegfx::B2DHomMatrix aTransform(ImplGetDeviceTransformation());
+ basegfx::B2DPolygon aB2DPolyLine;
+
+ aB2DPolyLine.append(basegfx::B2DPoint(rStartPt.X(), rStartPt.Y()));
+ aB2DPolyLine.append(basegfx::B2DPoint(rEndPt.X(), rEndPt.Y()));
+ aB2DPolyLine.transform( aTransform );
+
+ const bool bPixelSnapHairline(mnAntialiasing & AntialiasingFlags::PixelSnapHairline);
+
+ if( mpGraphics->DrawPolyLine(
+ basegfx::B2DHomMatrix(),
+ aB2DPolyLine,
+ 0.0,
+ 0.0, // tdf#124848 hairline
+ nullptr, // MM01
+ basegfx::B2DLineJoin::NONE,
+ css::drawing::LineCap_BUTT,
+ basegfx::deg2rad(15.0), // not used with B2DLineJoin::NONE, but the correct default
+ bPixelSnapHairline,
+ this))
+ {
+ return;
+ }
+ }
+
+ const Point aStartPt(ImplLogicToDevicePixel(rStartPt));
+ const Point aEndPt(ImplLogicToDevicePixel(rEndPt));
+
+ mpGraphics->DrawLine( aStartPt.X(), aStartPt.Y(), aEndPt.X(), aEndPt.Y(), this );
+
+ if( mpAlphaVDev )
+ mpAlphaVDev->DrawLine( rStartPt, rEndPt );
+}
+
+void OutputDevice::drawLine( basegfx::B2DPolyPolygon aLinePolyPolygon, const LineInfo& rInfo )
+{
+ const bool bTryAA((mnAntialiasing & AntialiasingFlags::EnableB2dDraw)
+ && mpGraphics->supportsOperation(OutDevSupportType::B2DDraw)
+ && RasterOp::OverPaint == GetRasterOp()
+ && IsLineColor());
+ basegfx::B2DPolyPolygon aFillPolyPolygon;
+ const bool bDashUsed(LineStyle::Dash == rInfo.GetStyle());
+ const bool bLineWidthUsed(rInfo.GetWidth() > 1);
+
+ if(bDashUsed && aLinePolyPolygon.count())
+ {
+ ::std::vector< double > fDotDashArray;
+ const double fDashLen(rInfo.GetDashLen());
+ const double fDotLen(rInfo.GetDotLen());
+ const double fDistance(rInfo.GetDistance());
+
+ for(sal_uInt16 a(0); a < rInfo.GetDashCount(); a++)
+ {
+ fDotDashArray.push_back(fDashLen);
+ fDotDashArray.push_back(fDistance);
+ }
+
+ for(sal_uInt16 b(0); b < rInfo.GetDotCount(); b++)
+ {
+ fDotDashArray.push_back(fDotLen);
+ fDotDashArray.push_back(fDistance);
+ }
+
+ const double fAccumulated(::std::accumulate(fDotDashArray.begin(), fDotDashArray.end(), 0.0));
+
+ if(fAccumulated > 0.0)
+ {
+ basegfx::B2DPolyPolygon aResult;
+
+ for(auto const& rPolygon : aLinePolyPolygon)
+ {
+ basegfx::B2DPolyPolygon aLineTarget;
+ basegfx::utils::applyLineDashing(
+ rPolygon,
+ fDotDashArray,
+ &aLineTarget);
+ aResult.append(aLineTarget);
+ }
+
+ aLinePolyPolygon = aResult;
+ }
+ }
+
+ if(bLineWidthUsed && aLinePolyPolygon.count())
+ {
+ const double fHalfLineWidth((rInfo.GetWidth() * 0.5) + 0.5);
+
+ if(aLinePolyPolygon.areControlPointsUsed())
+ {
+ // #i110768# When area geometry has to be created, do not
+ // use the fallback bezier decomposition inside createAreaGeometry,
+ // but one that is at least as good as ImplSubdivideBezier was.
+ // There, Polygon::AdaptiveSubdivide was used with default parameter
+ // 1.0 as quality index.
+ aLinePolyPolygon = basegfx::utils::adaptiveSubdivideByDistance(aLinePolyPolygon, 1.0);
+ }
+
+ for(auto const& rPolygon : aLinePolyPolygon)
+ {
+ aFillPolyPolygon.append(basegfx::utils::createAreaGeometry(
+ rPolygon,
+ fHalfLineWidth,
+ rInfo.GetLineJoin(),
+ rInfo.GetLineCap()));
+ }
+
+ aLinePolyPolygon.clear();
+ }
+
+ GDIMetaFile* pOldMetaFile = mpMetaFile;
+ mpMetaFile = nullptr;
+
+ if(aLinePolyPolygon.count())
+ {
+ for(auto const& rB2DPolygon : aLinePolyPolygon)
+ {
+ const bool bPixelSnapHairline(mnAntialiasing & AntialiasingFlags::PixelSnapHairline);
+ bool bDone(false);
+
+ if(bTryAA)
+ {
+ bDone = mpGraphics->DrawPolyLine(
+ basegfx::B2DHomMatrix(),
+ rB2DPolygon,
+ 0.0,
+ 0.0, // tdf#124848 hairline
+ nullptr, // MM01
+ basegfx::B2DLineJoin::NONE,
+ css::drawing::LineCap_BUTT,
+ basegfx::deg2rad(15.0), // not used with B2DLineJoin::NONE, but the correct default
+ bPixelSnapHairline,
+ this);
+ }
+
+ if(!bDone)
+ {
+ tools::Polygon aPolygon(rB2DPolygon);
+ mpGraphics->DrawPolyLine(
+ aPolygon.GetSize(),
+ reinterpret_cast<SalPoint*>(aPolygon.GetPointAry()),
+ this);
+ }
+ }
+ }
+
+ if(aFillPolyPolygon.count())
+ {
+ const Color aOldLineColor( maLineColor );
+ const Color aOldFillColor( maFillColor );
+
+ SetLineColor();
+ InitLineColor();
+ SetFillColor( aOldLineColor );
+ InitFillColor();
+
+ bool bDone(false);
+
+ if(bTryAA)
+ {
+ bDone = mpGraphics->DrawPolyPolygon(
+ basegfx::B2DHomMatrix(),
+ aFillPolyPolygon,
+ 0.0,
+ this);
+ }
+
+ if(!bDone)
+ {
+ for(auto const& rB2DPolygon : aFillPolyPolygon)
+ {
+ tools::Polygon aPolygon(rB2DPolygon);
+
+ // need to subdivide, mpGraphics->DrawPolygon ignores curves
+ aPolygon.AdaptiveSubdivide(aPolygon);
+ mpGraphics->DrawPolygon(aPolygon.GetSize(), reinterpret_cast<const SalPoint*>(aPolygon.GetConstPointAry()), this);
+ }
+ }
+
+ SetFillColor( aOldFillColor );
+ SetLineColor( aOldLineColor );
+ }
+
+ mpMetaFile = pOldMetaFile;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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