office-gobmx/vcl/source/outdev/polyline.cxx
Noel Grandin 2d009c4057 loplugin:moveit
Change-Id: I2702e716dc669ffbb870d36d060e110288d7a744
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/137043
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2022-07-14 11:18:21 +02:00

408 lines
13 KiB
C++

/* -*- 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);
tools::Polygon aToolsPolygon( rB2DPolygon );
mpMetaFile->AddAction( new MetaPolyLineAction( std::move(aToolsPolygon), std::move(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
tools::Polygon aToolsPolygon( rB2DPolygon );
mpMetaFile->AddAction( new MetaPolyLineAction( std::move(aToolsPolygon), std::move(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: */