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Diffstat (limited to 'vcl/source/outdev/line.cxx')
| -rw-r--r-- | vcl/source/outdev/line.cxx | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/vcl/source/outdev/line.cxx b/vcl/source/outdev/line.cxx new file mode 100644 index 000000000..2556a09bf --- /dev/null +++ b/vcl/source/outdev/line.cxx @@ -0,0 +1,358 @@ +/* -*- 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 <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/polygon/b2dpolypolygontools.hxx> +#include <basegfx/polygon/b2dlinegeometry.hxx> +#include <tools/debug.hxx> + +#include <vcl/lineinfo.hxx> +#include <vcl/metaact.hxx> +#include <vcl/virdev.hxx> + +#include <drawmode.hxx> +#include <salgdi.hxx> + +#include <cassert> +#include <numeric> + +void OutputDevice::SetLineColor() +{ + + if ( mpMetaFile ) + mpMetaFile->AddAction( new MetaLineColorAction( Color(), false ) ); + + if ( mbLineColor ) + { + mbInitLineColor = true; + mbLineColor = false; + maLineColor = COL_TRANSPARENT; + } + + if( mpAlphaVDev ) + mpAlphaVDev->SetLineColor(); +} + +void OutputDevice::SetLineColor( const Color& rColor ) +{ + + Color aColor = vcl::drawmode::GetLineColor(rColor, GetDrawMode(), GetSettings().GetStyleSettings()); + + if( mpMetaFile ) + mpMetaFile->AddAction( new MetaLineColorAction( aColor, true ) ); + + if( aColor.IsTransparent() ) + { + if ( mbLineColor ) + { + mbInitLineColor = true; + mbLineColor = false; + maLineColor = COL_TRANSPARENT; + } + } + else + { + if( maLineColor != aColor ) + { + mbInitLineColor = true; + mbLineColor = true; + maLineColor = aColor; + } + } + + if( mpAlphaVDev ) + mpAlphaVDev->SetLineColor( COL_BLACK ); +} + +void OutputDevice::InitLineColor() +{ + DBG_TESTSOLARMUTEX(); + + if( mbLineColor ) + { + if( RasterOp::N0 == meRasterOp ) + mpGraphics->SetROPLineColor( SalROPColor::N0 ); + else if( RasterOp::N1 == meRasterOp ) + mpGraphics->SetROPLineColor( SalROPColor::N1 ); + else if( RasterOp::Invert == meRasterOp ) + mpGraphics->SetROPLineColor( SalROPColor::Invert ); + else + mpGraphics->SetLineColor( maLineColor ); + } + else + { + mpGraphics->SetLineColor(); + } + + mbInitLineColor = false; +} + +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; + assert(mpGraphics); + + 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; + assert(mpGraphics); + + if ( mbInitClipRegion ) + InitClipRegion(); + + if ( mbOutputClipped ) + return; + + if ( mbInitLineColor ) + InitLineColor(); + + bool bDrawn = false; + + // #i101598# support AA and snap for lines, too + if( 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); + + bDrawn = 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); + } + if(!bDrawn) + { + 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 bTryB2d(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 = rInfo.GetDotDashArray(); + const double fAccumulated(::std::accumulate(fDotDashArray.begin(), fDotDashArray.end(), 0.0)); + + if(fAccumulated > 0.0) + { + basegfx::B2DPolyPolygon aResult; + + for(auto const& rPolygon : std::as_const(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 : std::as_const(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 : std::as_const(aLinePolyPolygon)) + { + const bool bPixelSnapHairline(mnAntialiasing & AntialiasingFlags::PixelSnapHairline); + bool bDone(false); + + if(bTryB2d) + { + 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(), + aPolygon.GetPointAry(), + *this); + } + } + } + + if(aFillPolyPolygon.count()) + { + const Color aOldLineColor( maLineColor ); + const Color aOldFillColor( maFillColor ); + + SetLineColor(); + InitLineColor(); + SetFillColor( aOldLineColor ); + InitFillColor(); + + bool bDone(false); + + if(bTryB2d) + { + bDone = mpGraphics->DrawPolyPolygon( + basegfx::B2DHomMatrix(), + aFillPolyPolygon, + 0.0, + *this); + } + + if(!bDone) + { + for(auto const& rB2DPolygon : std::as_const(aFillPolyPolygon)) + { + tools::Polygon aPolygon(rB2DPolygon); + + // need to subdivide, mpGraphics->DrawPolygon ignores curves + aPolygon.AdaptiveSubdivide(aPolygon); + mpGraphics->DrawPolygon(aPolygon.GetSize(), aPolygon.GetConstPointAry(), *this); + } + } + + SetFillColor( aOldFillColor ); + SetLineColor( aOldLineColor ); + } + + mpMetaFile = pOldMetaFile; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |