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Diffstat (limited to 'basegfx/source/polygon/b2dpolypolygontools.cxx')
| -rw-r--r-- | basegfx/source/polygon/b2dpolypolygontools.cxx | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/basegfx/source/polygon/b2dpolypolygontools.cxx b/basegfx/source/polygon/b2dpolypolygontools.cxx new file mode 100644 index 000000000..74cdf2324 --- /dev/null +++ b/basegfx/source/polygon/b2dpolypolygontools.cxx @@ -0,0 +1,656 @@ +/* -*- 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/polygon/b2dpolypolygontools.hxx> +#include <osl/diagnose.h> +#include <com/sun/star/drawing/PolyPolygonBezierCoords.hpp> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/numeric/ftools.hxx> +#include <rtl/math.hxx> + +#include <algorithm> +#include <numeric> + +namespace basegfx::utils +{ + B2DPolyPolygon correctOrientations(const B2DPolyPolygon& rCandidate) + { + B2DPolyPolygon aRetval(rCandidate); + const sal_uInt32 nCount(aRetval.count()); + + for(sal_uInt32 a(0); a < nCount; a++) + { + const B2DPolygon& aCandidate(rCandidate.getB2DPolygon(a)); + const B2VectorOrientation aOrientation(utils::getOrientation(aCandidate)); + sal_uInt32 nDepth(0); + + for(sal_uInt32 b(0); b < nCount; b++) + { + if(b != a) + { + const B2DPolygon& aCompare(rCandidate.getB2DPolygon(b)); + + if(utils::isInside(aCompare, aCandidate, true)) + { + nDepth++; + } + } + } + + const bool bShallBeHole((nDepth & 0x00000001) == 1); + const bool bIsHole(aOrientation == B2VectorOrientation::Negative); + + if(bShallBeHole != bIsHole && aOrientation != B2VectorOrientation::Neutral) + { + B2DPolygon aFlipped(aCandidate); + aFlipped.flip(); + aRetval.setB2DPolygon(a, aFlipped); + } + } + + return aRetval; + } + + B2DPolyPolygon correctOutmostPolygon(const B2DPolyPolygon& rCandidate) + { + const sal_uInt32 nCount(rCandidate.count()); + + if(nCount > 1) + { + for(sal_uInt32 a(0); a < nCount; a++) + { + const B2DPolygon& aCandidate(rCandidate.getB2DPolygon(a)); + sal_uInt32 nDepth(0); + + for(sal_uInt32 b(0); b < nCount; b++) + { + if(b != a) + { + const B2DPolygon& aCompare(rCandidate.getB2DPolygon(b)); + + if(utils::isInside(aCompare, aCandidate, true)) + { + nDepth++; + } + } + } + + if(!nDepth) + { + B2DPolyPolygon aRetval(rCandidate); + + if(a != 0) + { + // exchange polygon a and polygon 0 + aRetval.setB2DPolygon(0, aCandidate); + aRetval.setB2DPolygon(a, rCandidate.getB2DPolygon(0)); + } + + // exit + return aRetval; + } + } + } + + return rCandidate; + } + + B2DPolyPolygon adaptiveSubdivideByDistance(const B2DPolyPolygon& rCandidate, double fDistanceBound) + { + if(rCandidate.areControlPointsUsed()) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + if(rPolygon.areControlPointsUsed()) + { + aRetval.append(utils::adaptiveSubdivideByDistance(rPolygon, fDistanceBound)); + } + else + { + aRetval.append(rPolygon); + } + } + + return aRetval; + } + else + { + return rCandidate; + } + } + + B2DPolyPolygon adaptiveSubdivideByAngle(const B2DPolyPolygon& rCandidate, double fAngleBound) + { + if(rCandidate.areControlPointsUsed()) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + if(rPolygon.areControlPointsUsed()) + { + aRetval.append(utils::adaptiveSubdivideByAngle(rPolygon, fAngleBound)); + } + else + { + aRetval.append(rPolygon); + } + } + + return aRetval; + } + else + { + return rCandidate; + } + } + + bool isInside(const B2DPolyPolygon& rCandidate, const B2DPoint& rPoint, bool bWithBorder) + { + if(rCandidate.count() == 1) + { + return isInside(rCandidate.getB2DPolygon(0), rPoint, bWithBorder); + } + else + { + sal_Int32 nInsideCount = std::count_if(rCandidate.begin(), rCandidate.end(), [rPoint, bWithBorder](B2DPolygon polygon){ return isInside(polygon, rPoint, bWithBorder); }); + + return (nInsideCount % 2); + } + } + + B2DRange getRange(const B2DPolyPolygon& rCandidate) + { + B2DRange aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.expand(utils::getRange(rPolygon)); + } + + return aRetval; + } + + double getSignedArea(const B2DPolyPolygon& rCandidate) + { + double fRetval(0.0); + + for(auto const& rPolygon : rCandidate) + { + fRetval += utils::getSignedArea(rPolygon); + } + + return fRetval; + } + + double getArea(const B2DPolyPolygon& rCandidate) + { + return fabs(getSignedArea(rCandidate)); + } + + void applyLineDashing(const B2DPolyPolygon& rCandidate, const std::vector<double>& rDotDashArray, B2DPolyPolygon* pLineTarget, double fFullDashDotLen) + { + if(fFullDashDotLen == 0.0 && !rDotDashArray.empty()) + { + // calculate fFullDashDotLen from rDotDashArray + fFullDashDotLen = std::accumulate(rDotDashArray.begin(), rDotDashArray.end(), 0.0); + } + + if(!(rCandidate.count() && fFullDashDotLen > 0.0)) + return; + + B2DPolyPolygon aLineTarget; + + for(auto const& rPolygon : rCandidate) + { + applyLineDashing( + rPolygon, + rDotDashArray, + pLineTarget ? &aLineTarget : nullptr, + nullptr, + fFullDashDotLen); + + if(pLineTarget) + { + pLineTarget->append(aLineTarget); + } + } + } + + bool isInEpsilonRange(const B2DPolyPolygon& rCandidate, const B2DPoint& rTestPosition, double fDistance) + { + for(auto const& rPolygon : rCandidate) + { + if(isInEpsilonRange(rPolygon, rTestPosition, fDistance)) + { + return true; + } + } + + return false; + } + + B3DPolyPolygon createB3DPolyPolygonFromB2DPolyPolygon(const B2DPolyPolygon& rCandidate, double fZCoordinate) + { + B3DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(createB3DPolygonFromB2DPolygon(rPolygon, fZCoordinate)); + } + + return aRetval; + } + + B2DPolyPolygon createB2DPolyPolygonFromB3DPolyPolygon(const B3DPolyPolygon& rCandidate, const B3DHomMatrix& rMat) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(createB2DPolygonFromB3DPolygon(rPolygon, rMat)); + } + + return aRetval; + } + + double getSmallestDistancePointToPolyPolygon(const B2DPolyPolygon& rCandidate, const B2DPoint& rTestPoint, sal_uInt32& rPolygonIndex, sal_uInt32& rEdgeIndex, double& rCut) + { + double fRetval(DBL_MAX); + const double fZero(0.0); + const sal_uInt32 nPolygonCount(rCandidate.count()); + + for(sal_uInt32 a(0); a < nPolygonCount; a++) + { + const B2DPolygon& aCandidate(rCandidate.getB2DPolygon(a)); + sal_uInt32 nNewEdgeIndex; + double fNewCut(0.0); + const double fNewDistance(getSmallestDistancePointToPolygon(aCandidate, rTestPoint, nNewEdgeIndex, fNewCut)); + + if(fRetval == DBL_MAX || fNewDistance < fRetval) + { + fRetval = fNewDistance; + rPolygonIndex = a; + rEdgeIndex = nNewEdgeIndex; + rCut = fNewCut; + + if(fTools::equal(fRetval, fZero)) + { + // already found zero distance, cannot get better. Ensure numerical zero value and end loop. + fRetval = 0.0; + break; + } + } + } + + return fRetval; + } + + B2DPolyPolygon distort(const B2DPolyPolygon& rCandidate, const B2DRange& rOriginal, const B2DPoint& rTopLeft, const B2DPoint& rTopRight, const B2DPoint& rBottomLeft, const B2DPoint& rBottomRight) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(distort(rPolygon, rOriginal, rTopLeft, rTopRight, rBottomLeft, rBottomRight)); + } + + return aRetval; + } + + B2DPolyPolygon expandToCurve(const B2DPolyPolygon& rCandidate) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(expandToCurve(rPolygon)); + } + + return aRetval; + } + + B2DPolyPolygon growInNormalDirection(const B2DPolyPolygon& rCandidate, double fValue) + { + if(fValue != 0.0) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(growInNormalDirection(rPolygon, fValue)); + } + + return aRetval; + } + else + { + return rCandidate; + } + } + + B2DPolyPolygon reSegmentPolyPolygon(const B2DPolyPolygon& rCandidate, sal_uInt32 nSegments) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(reSegmentPolygon(rPolygon, nSegments)); + } + + return aRetval; + } + + B2DPolyPolygon interpolate(const B2DPolyPolygon& rOld1, const B2DPolyPolygon& rOld2, double t) + { + OSL_ENSURE(rOld1.count() == rOld2.count(), "B2DPolyPolygon interpolate: Different geometry (!)"); + B2DPolyPolygon aRetval; + + for(sal_uInt32 a(0); a < rOld1.count(); a++) + { + aRetval.append(interpolate(rOld1.getB2DPolygon(a), rOld2.getB2DPolygon(a), t)); + } + + return aRetval; + } + + bool isRectangle( const B2DPolyPolygon& rPoly ) + { + // exclude some cheap cases first + if( rPoly.count() != 1 ) + return false; + + return isRectangle( rPoly.getB2DPolygon(0) ); + } + + // #i76891# + B2DPolyPolygon simplifyCurveSegments(const B2DPolyPolygon& rCandidate) + { + if(rCandidate.areControlPointsUsed()) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(simplifyCurveSegments(rPolygon)); + } + + return aRetval; + } + else + { + return rCandidate; + } + } + + B2DPolyPolygon snapPointsOfHorizontalOrVerticalEdges(const B2DPolyPolygon& rCandidate) + { + B2DPolyPolygon aRetval; + + for(auto const& rPolygon : rCandidate) + { + aRetval.append(snapPointsOfHorizontalOrVerticalEdges(rPolygon)); + } + + return aRetval; + } + + B2DPolyPolygon createSevenSegmentPolyPolygon(char nNumber, bool bLitSegments) + { + // config here + // { + const double fTotalSize=1.0; + const double fPosMiddleSegment=0.6; + const double fSegmentEndChopHoriz=0.08; + const double fSegmentEndChopVert =0.04; + // } + // config here + + const double fLeft=0.0; + const double fRight=fTotalSize; + const double fTop=0.0; + const double fMiddle=fPosMiddleSegment; + const double fBottom=fTotalSize; + + // from 0 to 5: pair of segment corner coordinates + + // segment corner indices are these: + + // 0 - 1 + // | | + // 2 - 3 + // | | + // 4 - 5 + + static const double corners[] = + { + fLeft, fTop, + fRight, fTop, + fLeft, fMiddle, + fRight, fMiddle, + fLeft, fBottom, + fRight, fBottom + }; + + // from 0 to 9: which segments are 'lit' for this number? + + // array denotes graph edges to traverse, with -1 means + // stop (the vertices are the corner indices from above): + // 0 + // - + // 1 | | 2 + // - 3 + // 4 | | 5 + // - + // 6 + + static const int numbers[] = + { + 1, 1, 1, 0, 1, 1, 1, // 0 + 0, 0, 1, 0, 0, 1, 0, // 1 + 1, 0, 1, 1, 1, 0, 1, // 2 + 1, 0, 1, 1, 0, 1, 1, // 3 + 0, 1, 1, 1, 0, 1, 0, // 4 + 1, 1, 0, 1, 0, 1, 1, // 5 + 1, 1, 0, 1, 1, 1, 1, // 6 + 1, 0, 1, 0, 0, 1, 0, // 1 + 1, 1, 1, 1, 1, 1, 1, // 8 + 1, 1, 1, 1, 0, 1, 1, // 9 + 0, 0, 0, 1, 0, 0, 0, // '-' + 1, 1, 0, 1, 1, 0, 1, // 'E' + }; + + // maps segment index to two corner ids: + static const int index2corner[] = + { + 0, 2, // 0 + 0, 4, // 1 + 2, 6, // 2 + 4, 6, // 3 + 4, 8, // 4 + 6, 10, // 5 + 8, 10, // 6 + }; + + B2DPolyPolygon aRes; + if( nNumber == '-' ) + { + nNumber = 10; + } + else if( nNumber == 'E' ) + { + nNumber = 11; + } + else if( nNumber == '.' ) + { + if( bLitSegments ) + aRes.append(createPolygonFromCircle(B2DPoint(fTotalSize/2, fTotalSize), + fSegmentEndChopHoriz)); + return aRes; + } + else + { + nNumber=std::clamp<sal_uInt32>(nNumber,'0','9') - '0'; + } + + B2DPolygon aCurrSegment; + const size_t sliceSize=SAL_N_ELEMENTS(numbers)/12; + const int* pCurrSegment=numbers + nNumber*sliceSize; + for( size_t i=0; i<sliceSize; i++, pCurrSegment++) + { + if( !(*pCurrSegment ^ int(bLitSegments)) ) + { + const size_t j=2*i; + aCurrSegment.clear(); + B2DPoint start(corners[index2corner[j]], + corners[index2corner[j]+1] ); + B2DPoint end (corners[index2corner[j+1]], + corners[index2corner[j+1]+1]); + + if( rtl::math::approxEqual(start.getX(), end.getX()) ) + { + start.setY(start.getY()+fSegmentEndChopVert); + end.setY(end.getY()-fSegmentEndChopVert); + } + else + { + start.setX(start.getX()+fSegmentEndChopHoriz); + end.setX(end.getX()-fSegmentEndChopHoriz); + } + + aCurrSegment.append(start); + aCurrSegment.append(end); + } + aRes.append(aCurrSegment); + } + + return aRes; + } + + // converters for css::drawing::PointSequence + + B2DPolyPolygon UnoPointSequenceSequenceToB2DPolyPolygon( + const css::drawing::PointSequenceSequence& rPointSequenceSequenceSource) + { + B2DPolyPolygon aRetval; + const css::drawing::PointSequence* pPointSequence = rPointSequenceSequenceSource.getConstArray(); + const css::drawing::PointSequence* pPointSeqEnd = pPointSequence + rPointSequenceSequenceSource.getLength(); + + for(;pPointSequence != pPointSeqEnd; pPointSequence++) + { + const B2DPolygon aNewPolygon = UnoPointSequenceToB2DPolygon(*pPointSequence); + aRetval.append(aNewPolygon); + } + + return aRetval; + } + + void B2DPolyPolygonToUnoPointSequenceSequence( + const B2DPolyPolygon& rPolyPolygon, + css::drawing::PointSequenceSequence& rPointSequenceSequenceRetval) + { + const sal_uInt32 nCount(rPolyPolygon.count()); + + if(nCount) + { + rPointSequenceSequenceRetval.realloc(nCount); + css::drawing::PointSequence* pPointSequence = rPointSequenceSequenceRetval.getArray(); + + for(auto const& rPolygon : rPolyPolygon) + { + B2DPolygonToUnoPointSequence(rPolygon, *pPointSequence); + pPointSequence++; + } + } + else + { + rPointSequenceSequenceRetval.realloc(0); + } + } + + // converters for css::drawing::PolyPolygonBezierCoords (curved polygons) + + B2DPolyPolygon UnoPolyPolygonBezierCoordsToB2DPolyPolygon( + const css::drawing::PolyPolygonBezierCoords& rPolyPolygonBezierCoordsSource) + { + B2DPolyPolygon aRetval; + const sal_uInt32 nSequenceCount(static_cast<sal_uInt32>(rPolyPolygonBezierCoordsSource.Coordinates.getLength())); + + if(nSequenceCount) + { + OSL_ENSURE(nSequenceCount == static_cast<sal_uInt32>(rPolyPolygonBezierCoordsSource.Flags.getLength()), + "UnoPolyPolygonBezierCoordsToB2DPolyPolygon: unequal number of Points and Flags (!)"); + const css::drawing::PointSequence* pPointSequence = rPolyPolygonBezierCoordsSource.Coordinates.getConstArray(); + const css::drawing::FlagSequence* pFlagSequence = rPolyPolygonBezierCoordsSource.Flags.getConstArray(); + + for(sal_uInt32 a(0); a < nSequenceCount; a++) + { + const B2DPolygon aNewPolygon(UnoPolygonBezierCoordsToB2DPolygon( + *pPointSequence, + *pFlagSequence)); + + pPointSequence++; + pFlagSequence++; + aRetval.append(aNewPolygon); + } + } + + return aRetval; + } + + void B2DPolyPolygonToUnoPolyPolygonBezierCoords( + const B2DPolyPolygon& rPolyPolygon, + css::drawing::PolyPolygonBezierCoords& rPolyPolygonBezierCoordsRetval) + { + const sal_uInt32 nCount(rPolyPolygon.count()); + + if(nCount) + { + // prepare return value memory + rPolyPolygonBezierCoordsRetval.Coordinates.realloc(static_cast<sal_Int32>(nCount)); + rPolyPolygonBezierCoordsRetval.Flags.realloc(static_cast<sal_Int32>(nCount)); + + // get pointers to arrays + css::drawing::PointSequence* pPointSequence = rPolyPolygonBezierCoordsRetval.Coordinates.getArray(); + css::drawing::FlagSequence* pFlagSequence = rPolyPolygonBezierCoordsRetval.Flags.getArray(); + + for(auto const& rSource : rPolyPolygon) + { + B2DPolygonToUnoPolygonBezierCoords( + rSource, + *pPointSequence, + *pFlagSequence); + pPointSequence++; + pFlagSequence++; + } + } + else + { + rPolyPolygonBezierCoordsRetval.Coordinates.realloc(0); + rPolyPolygonBezierCoordsRetval.Flags.realloc(0); + } + } + +} // end of namespace + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |