Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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: */