3b83c6ac80
.. instead of a Primitive2DContainer. The container very frequently contains only a single item, since the decomposition method often sticks only a single top-level node in there, so it turns out to be a net loss overall, memory consumption-wise. Also, if we return a single Primitive2DReference from a BufferedDecomposition, that maximises the sharing of data between the BufferedDecomposition objects at the bottom of the decomposed tree, and objects higher up. Change-Id: Iaf272e60e2997299cc35a1bd209c51b6b79e9a8b Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162976 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
190 lines
9.6 KiB
C++
190 lines
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <drawinglayer/primitive2d/helplineprimitive2d.hxx>
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#include <basegfx/polygon/b2dpolygon.hxx>
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#include <basegfx/polygon/b2dpolygonclipper.hxx>
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#include <drawinglayer/geometry/viewinformation2d.hxx>
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#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
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#include <drawinglayer/primitive2d/PolygonMarkerPrimitive2D.hxx>
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#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
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using namespace com::sun::star;
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namespace drawinglayer::primitive2d
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{
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Primitive2DReference HelplinePrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
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{
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if(rViewInformation.getViewport().isEmpty() || getDirection().equalZero())
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return nullptr;
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// position to view coordinates, DashLen and DashLen in logic
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const basegfx::B2DPoint aViewPosition(rViewInformation.getObjectToViewTransformation() * getPosition());
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Primitive2DReference xRet;
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switch(getStyle())
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{
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default : // HelplineStyle2D::Point
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{
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const double fViewFixValue(15.0);
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basegfx::B2DVector aNormalizedDirection(getDirection());
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aNormalizedDirection.normalize();
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aNormalizedDirection *= fViewFixValue;
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const basegfx::B2DPoint aStartA(aViewPosition - aNormalizedDirection);
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const basegfx::B2DPoint aEndA(aViewPosition + aNormalizedDirection);
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basegfx::B2DPolygon aLineA;
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aLineA.append(aStartA);
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aLineA.append(aEndA);
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aLineA.transform(rViewInformation.getInverseObjectToViewTransformation());
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auto xMarker1 = new PolygonMarkerPrimitive2D(std::move(aLineA), getRGBColA(), getRGBColB(), getDiscreteDashLength());
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const basegfx::B2DVector aPerpendicularNormalizedDirection(basegfx::getPerpendicular(aNormalizedDirection));
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const basegfx::B2DPoint aStartB(aViewPosition - aPerpendicularNormalizedDirection);
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const basegfx::B2DPoint aEndB(aViewPosition + aPerpendicularNormalizedDirection);
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basegfx::B2DPolygon aLineB;
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aLineB.append(aStartB);
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aLineB.append(aEndB);
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aLineB.transform(rViewInformation.getInverseObjectToViewTransformation());
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auto xMarker2 = new PolygonMarkerPrimitive2D(std::move(aLineB), getRGBColA(), getRGBColB(), getDiscreteDashLength());
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xRet = new GroupPrimitive2D(Primitive2DContainer{xMarker1, xMarker2});
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break;
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}
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case HelplineStyle2D::Line :
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{
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basegfx::B2DPolygon aLine;
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if(basegfx::areParallel(getDirection(), basegfx::B2DVector(1.0, 0.0)))
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{
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// parallel to X-Axis, get cuts with Y-Axes
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const double fCutA((rViewInformation.getDiscreteViewport().getMinX() - aViewPosition.getX()) / getDirection().getX());
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const double fCutB((rViewInformation.getDiscreteViewport().getMaxX() - aViewPosition.getX()) / getDirection().getX());
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const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
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const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
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const bool bBothLeft(aPosA.getX() < rViewInformation.getDiscreteViewport().getMinX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMinX());
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const bool bBothRight(aPosA.getX() > rViewInformation.getDiscreteViewport().getMaxX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMaxX());
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if(!bBothLeft && !bBothRight)
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{
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aLine.append(aPosA);
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aLine.append(aPosB);
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}
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}
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else
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{
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// get cuts with X-Axes
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const double fCutA((rViewInformation.getDiscreteViewport().getMinY() - aViewPosition.getY()) / getDirection().getY());
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const double fCutB((rViewInformation.getDiscreteViewport().getMaxY() - aViewPosition.getY()) / getDirection().getY());
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const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
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const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
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const bool bBothAbove(aPosA.getY() < rViewInformation.getDiscreteViewport().getMinY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMinY());
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const bool bBothBelow(aPosA.getY() > rViewInformation.getDiscreteViewport().getMaxY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMaxY());
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if(!bBothAbove && !bBothBelow)
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{
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aLine.append(aPosA);
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aLine.append(aPosB);
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}
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}
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if(aLine.count())
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{
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// clip against visible area
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const basegfx::B2DPolyPolygon aResult(basegfx::utils::clipPolygonOnRange(aLine, rViewInformation.getDiscreteViewport(), true, true));
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Primitive2DContainer aContainer;
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for(sal_uInt32 a(0); a < aResult.count(); a++)
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{
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basegfx::B2DPolygon aPart(aResult.getB2DPolygon(a));
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aPart.transform(rViewInformation.getInverseObjectToViewTransformation());
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aContainer.push_back(new PolygonMarkerPrimitive2D(std::move(aPart), getRGBColA(), getRGBColB(), getDiscreteDashLength()));
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}
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xRet = new GroupPrimitive2D(std::move(aContainer));
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}
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break;
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}
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}
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return xRet;
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}
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HelplinePrimitive2D::HelplinePrimitive2D(
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const basegfx::B2DPoint& rPosition,
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const basegfx::B2DVector& rDirection,
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HelplineStyle2D eStyle,
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const basegfx::BColor& rRGBColA,
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const basegfx::BColor& rRGBColB,
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double fDiscreteDashLength)
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: maPosition(rPosition),
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maDirection(rDirection),
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meStyle(eStyle),
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maRGBColA(rRGBColA),
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maRGBColB(rRGBColB),
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mfDiscreteDashLength(fDiscreteDashLength)
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{
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}
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bool HelplinePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
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{
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if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
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{
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const HelplinePrimitive2D& rCompare = static_cast<const HelplinePrimitive2D&>(rPrimitive);
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return (getPosition() == rCompare.getPosition()
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&& getDirection() == rCompare.getDirection()
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&& getStyle() == rCompare.getStyle()
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&& getRGBColA() == rCompare.getRGBColA()
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&& getRGBColB() == rCompare.getRGBColB()
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&& getDiscreteDashLength() == rCompare.getDiscreteDashLength());
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}
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return false;
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}
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void HelplinePrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
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{
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if(getBuffered2DDecomposition())
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{
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if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation())
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{
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// conditions of last local decomposition have changed, delete
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const_cast< HelplinePrimitive2D* >(this)->setBuffered2DDecomposition(nullptr);
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}
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}
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if(!getBuffered2DDecomposition())
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{
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// remember ViewRange and ViewTransformation
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const_cast< HelplinePrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation();
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const_cast< HelplinePrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport();
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}
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// use parent implementation
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BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
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}
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// provide unique ID
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sal_uInt32 HelplinePrimitive2D::getPrimitive2DID() const
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{
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return PRIMITIVE2D_ID_HELPLINEPRIMITIVE2D;
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}
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} // end of namespace
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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