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Diffstat (limited to 'vcl/source/outdev/polyline.cxx')
| -rw-r--r-- | vcl/source/outdev/polyline.cxx | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/vcl/source/outdev/polyline.cxx b/vcl/source/outdev/polyline.cxx new file mode 100644 index 000000000..f699147c2 --- /dev/null +++ b/vcl/source/outdev/polyline.cxx @@ -0,0 +1,408 @@ +/* -*- 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 <sal/types.h> + +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/polygon/b2dlinegeometry.hxx> +#include <vcl/gdimtf.hxx> +#include <vcl/metaact.hxx> +#include <vcl/outdev.hxx> +#include <vcl/virdev.hxx> + +#include <salgdi.hxx> + +void OutputDevice::DrawPolyLine( const tools::Polygon& rPoly ) +{ + assert(!is_double_buffered_window()); + + if( mpMetaFile ) + mpMetaFile->AddAction( new MetaPolyLineAction( rPoly ) ); + + sal_uInt16 nPoints = rPoly.GetSize(); + + if ( !IsDeviceOutputNecessary() || !mbLineColor || (nPoints < 2) || ImplIsRecordLayout() ) + return; + + // we need a graphics + if ( !mpGraphics && !AcquireGraphics() ) + return; + assert(mpGraphics); + + if ( mbInitClipRegion ) + InitClipRegion(); + + if ( mbOutputClipped ) + return; + + if ( mbInitLineColor ) + InitLineColor(); + + // use b2dpolygon drawing if possible + if(DrawPolyLineDirectInternal( + basegfx::B2DHomMatrix(), + rPoly.getB2DPolygon())) + { + return; + } + + const basegfx::B2DPolygon aB2DPolyLine(rPoly.getB2DPolygon()); + const basegfx::B2DHomMatrix aTransform(ImplGetDeviceTransformation()); + const bool bPixelSnapHairline(mnAntialiasing & AntialiasingFlags::PixelSnapHairline); + + bool bDrawn = mpGraphics->DrawPolyLine( + aTransform, + aB2DPolyLine, + 0.0, + 0.0, // tdf#124848 hairline + nullptr, // MM01 + basegfx::B2DLineJoin::NONE, + css::drawing::LineCap_BUTT, + basegfx::deg2rad(15.0) /*default fMiterMinimumAngle, not used*/, + bPixelSnapHairline, + *this); + + if(!bDrawn) + { + tools::Polygon aPoly = ImplLogicToDevicePixel( rPoly ); + Point* pPtAry = aPoly.GetPointAry(); + + // #100127# Forward beziers to sal, if any + if( aPoly.HasFlags() ) + { + const PolyFlags* pFlgAry = aPoly.GetConstFlagAry(); + if( !mpGraphics->DrawPolyLineBezier( nPoints, pPtAry, pFlgAry, *this ) ) + { + aPoly = tools::Polygon::SubdivideBezier(aPoly); + pPtAry = aPoly.GetPointAry(); + mpGraphics->DrawPolyLine( aPoly.GetSize(), pPtAry, *this ); + } + } + else + { + mpGraphics->DrawPolyLine( nPoints, pPtAry, *this ); + } + } + + if( mpAlphaVDev ) + mpAlphaVDev->DrawPolyLine( rPoly ); +} + +void OutputDevice::DrawPolyLine( const tools::Polygon& rPoly, const LineInfo& rLineInfo ) +{ + assert(!is_double_buffered_window()); + + if ( rLineInfo.IsDefault() ) + { + DrawPolyLine( rPoly ); + return; + } + + if (IsDeviceOutputNecessary()) + { + auto eLineStyle = rLineInfo.GetStyle(); + switch (eLineStyle) + { + case LineStyle::NONE: + case LineStyle::Dash: + // use drawPolyLine for these + break; + case LineStyle::Solid: + // #i101491# Try direct Fallback to B2D-Version of DrawPolyLine + DrawPolyLine( + rPoly.getB2DPolygon(), + rLineInfo.GetWidth(), + rLineInfo.GetLineJoin(), + rLineInfo.GetLineCap(), + basegfx::deg2rad(15.0) /* default fMiterMinimumAngle, value not available in LineInfo */); + return; + default: + SAL_WARN("vcl.gdi", "Unknown LineStyle: " << static_cast<int>(eLineStyle)); + return; + } + } + + if ( mpMetaFile ) + mpMetaFile->AddAction( new MetaPolyLineAction( rPoly, rLineInfo ) ); + + drawPolyLine(rPoly, rLineInfo); +} + +void OutputDevice::DrawPolyLine( const basegfx::B2DPolygon& rB2DPolygon, + double fLineWidth, + basegfx::B2DLineJoin eLineJoin, + css::drawing::LineCap eLineCap, + double fMiterMinimumAngle) +{ + assert(!is_double_buffered_window()); + + if( mpMetaFile ) + { + LineInfo aLineInfo; + if( fLineWidth != 0.0 ) + aLineInfo.SetWidth( fLineWidth ); + + aLineInfo.SetLineJoin(eLineJoin); + aLineInfo.SetLineCap(eLineCap); + + const tools::Polygon aToolsPolygon( rB2DPolygon ); + mpMetaFile->AddAction( new MetaPolyLineAction( aToolsPolygon, aLineInfo ) ); + } + + // Do not paint empty PolyPolygons + if(!rB2DPolygon.count() || !IsDeviceOutputNecessary()) + return; + + // we need a graphics + if( !mpGraphics && !AcquireGraphics() ) + return; + assert(mpGraphics); + + if( mbInitClipRegion ) + InitClipRegion(); + + if( mbOutputClipped ) + return; + + if( mbInitLineColor ) + InitLineColor(); + + // use b2dpolygon drawing if possible + if(DrawPolyLineDirectInternal( + basegfx::B2DHomMatrix(), + rB2DPolygon, + fLineWidth, + 0.0, + nullptr, // MM01 + eLineJoin, + eLineCap, + fMiterMinimumAngle)) + { + return; + } + + // #i101491# + // no output yet; fallback to geometry decomposition and use filled polygon paint + // when line is fat and not too complex. ImplDrawPolyPolygonWithB2DPolyPolygon + // will do internal needed AA checks etc. + if(fLineWidth >= 2.5 && + rB2DPolygon.count() && + rB2DPolygon.count() <= 1000) + { + const double fHalfLineWidth((fLineWidth * 0.5) + 0.5); + const basegfx::B2DPolyPolygon aAreaPolyPolygon( + basegfx::utils::createAreaGeometry( rB2DPolygon, + fHalfLineWidth, + eLineJoin, + eLineCap, + fMiterMinimumAngle)); + const Color aOldLineColor(maLineColor); + const Color aOldFillColor(maFillColor); + + SetLineColor(); + InitLineColor(); + SetFillColor(aOldLineColor); + InitFillColor(); + + // draw using a loop; else the topology will paint a PolyPolygon + for(auto const& rPolygon : aAreaPolyPolygon) + { + ImplDrawPolyPolygonWithB2DPolyPolygon( + basegfx::B2DPolyPolygon(rPolygon)); + } + + SetLineColor(aOldLineColor); + InitLineColor(); + SetFillColor(aOldFillColor); + InitFillColor(); + + // when AA it is necessary to also paint the filled polygon's outline + // to avoid optical gaps + for(auto const& rPolygon : aAreaPolyPolygon) + { + (void)DrawPolyLineDirectInternal( + basegfx::B2DHomMatrix(), + rPolygon); + } + } + else + { + // fallback to old polygon drawing if needed + const tools::Polygon aToolsPolygon( rB2DPolygon ); + LineInfo aLineInfo; + if( fLineWidth != 0.0 ) + aLineInfo.SetWidth( fLineWidth ); + + drawPolyLine( aToolsPolygon, aLineInfo ); + } +} + +void OutputDevice::drawPolyLine(const tools::Polygon& rPoly, const LineInfo& rLineInfo) +{ + sal_uInt16 nPoints(rPoly.GetSize()); + + if ( !IsDeviceOutputNecessary() || !mbLineColor || ( nPoints < 2 ) || ( LineStyle::NONE == rLineInfo.GetStyle() ) || ImplIsRecordLayout() ) + return; + + // we need a graphics + if ( !mpGraphics && !AcquireGraphics() ) + return; + assert(mpGraphics); + + if ( mbInitClipRegion ) + InitClipRegion(); + + if ( mbOutputClipped ) + return; + + if ( mbInitLineColor ) + InitLineColor(); + + const LineInfo aInfo( ImplLogicToDevicePixel( rLineInfo ) ); + const bool bDashUsed(LineStyle::Dash == aInfo.GetStyle()); + const bool bLineWidthUsed(aInfo.GetWidth() > 1); + + if (bDashUsed || bLineWidthUsed) + { + basegfx::B2DPolygon aPoly = ImplLogicToDevicePixel(rPoly.getB2DPolygon()); + drawLine(basegfx::B2DPolyPolygon(aPoly), aInfo); + } + else + { + tools::Polygon aPoly = ImplLogicToDevicePixel(rPoly); + + // #100127# the subdivision HAS to be done here since only a pointer + // to an array of points is given to the DrawPolyLine method, there is + // NO way to find out there that it's a curve. + if( aPoly.HasFlags() ) + { + aPoly = tools::Polygon::SubdivideBezier( aPoly ); + nPoints = aPoly.GetSize(); + } + + mpGraphics->DrawPolyLine(nPoints, aPoly.GetPointAry(), *this); + } + + if( mpAlphaVDev ) + mpAlphaVDev->DrawPolyLine( rPoly, rLineInfo ); +} + +bool OutputDevice::DrawPolyLineDirect( + const basegfx::B2DHomMatrix& rObjectTransform, + const basegfx::B2DPolygon& rB2DPolygon, + double fLineWidth, + double fTransparency, + const std::vector< double >* pStroke, // MM01 + basegfx::B2DLineJoin eLineJoin, + css::drawing::LineCap eLineCap, + double fMiterMinimumAngle) +{ + if(DrawPolyLineDirectInternal(rObjectTransform, rB2DPolygon, fLineWidth, fTransparency, + pStroke, eLineJoin, eLineCap, fMiterMinimumAngle)) + { + // Worked, add metafile action (if recorded). This is done only here, + // because this function is public, other OutDev functions already add metafile + // actions, so they call the internal function directly. + if( mpMetaFile ) + { + LineInfo aLineInfo; + if( fLineWidth != 0.0 ) + aLineInfo.SetWidth( fLineWidth ); + // Transport known information, might be needed + aLineInfo.SetLineJoin(eLineJoin); + aLineInfo.SetLineCap(eLineCap); + // MiterMinimumAngle does not exist yet in LineInfo + const tools::Polygon aToolsPolygon( rB2DPolygon ); + mpMetaFile->AddAction( new MetaPolyLineAction( aToolsPolygon, aLineInfo ) ); + } + return true; + } + return false; +} + +bool OutputDevice::DrawPolyLineDirectInternal( + const basegfx::B2DHomMatrix& rObjectTransform, + const basegfx::B2DPolygon& rB2DPolygon, + double fLineWidth, + double fTransparency, + const std::vector< double >* pStroke, // MM01 + basegfx::B2DLineJoin eLineJoin, + css::drawing::LineCap eLineCap, + double fMiterMinimumAngle) +{ + assert(!is_double_buffered_window()); + + // AW: Do NOT paint empty PolyPolygons + if(!rB2DPolygon.count()) + return true; + + // we need a graphics + if( !mpGraphics && !AcquireGraphics() ) + return false; + assert(mpGraphics); + + if( mbInitClipRegion ) + InitClipRegion(); + + if( mbOutputClipped ) + return true; + + if( mbInitLineColor ) + InitLineColor(); + + const bool bTryB2d(mpGraphics->supportsOperation(OutDevSupportType::B2DDraw) && + RasterOp::OverPaint == GetRasterOp() && + IsLineColor()); + + if(bTryB2d) + { + // combine rObjectTransform with WorldToDevice + const basegfx::B2DHomMatrix aTransform(ImplGetDeviceTransformation() * rObjectTransform); + const bool bPixelSnapHairline((mnAntialiasing & AntialiasingFlags::PixelSnapHairline) && rB2DPolygon.count() < 1000); + + const double fAdjustedTransparency = mpAlphaVDev ? 0 : fTransparency; + // draw the polyline + bool bDrawSuccess = mpGraphics->DrawPolyLine( + aTransform, + rB2DPolygon, + fAdjustedTransparency, + fLineWidth, // tdf#124848 use LineWidth direct, do not try to solve for zero-case (aka hairline) + pStroke, // MM01 + eLineJoin, + eLineCap, + fMiterMinimumAngle, + bPixelSnapHairline, + *this); + + if( bDrawSuccess ) + { + if (mpAlphaVDev) + mpAlphaVDev->DrawPolyLineDirect(rObjectTransform, rB2DPolygon, fLineWidth, + fTransparency, pStroke, eLineJoin, eLineCap, + fMiterMinimumAngle); + + return true; + } + } + return false; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |