diff options
Diffstat (limited to 'basegfx/source/polygon/b2dpolygon.cxx')
| -rw-r--r-- | basegfx/source/polygon/b2dpolygon.cxx | 1498 |
1 files changed, 1498 insertions, 0 deletions
diff --git a/basegfx/source/polygon/b2dpolygon.cxx b/basegfx/source/polygon/b2dpolygon.cxx new file mode 100644 index 000000000..8a4136666 --- /dev/null +++ b/basegfx/source/polygon/b2dpolygon.cxx @@ -0,0 +1,1498 @@ +/* -*- 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 <osl/diagnose.h> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/point/b2dpoint.hxx> +#include <basegfx/vector/b2dvector.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/curve/b2dcubicbezier.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/utils/systemdependentdata.hxx> +#include <memory> +#include <vector> + +namespace +{ + +class CoordinateDataArray2D +{ +private: + std::vector<basegfx::B2DPoint> maVector; + +public: + explicit CoordinateDataArray2D(sal_uInt32 nCount) + : maVector(nCount) + { + } + + CoordinateDataArray2D(const CoordinateDataArray2D& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount) + : maVector(rOriginal.maVector.begin() + nIndex, rOriginal.maVector.begin() + (nIndex + nCount)) + { + } + + sal_uInt32 count() const + { + return maVector.size(); + } + + bool operator==(const CoordinateDataArray2D& rCandidate) const + { + return (maVector == rCandidate.maVector); + } + + const basegfx::B2DPoint& getCoordinate(sal_uInt32 nIndex) const + { + return maVector[nIndex]; + } + + void setCoordinate(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue) + { + maVector[nIndex] = rValue; + } + + void reserve(sal_uInt32 nCount) + { + maVector.reserve(nCount); + } + + void append(const basegfx::B2DPoint& rValue) + { + maVector.push_back(rValue); + } + + void insert(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue, sal_uInt32 nCount) + { + if(nCount) + { + // add nCount copies of rValue + auto aIndex = maVector.begin(); + aIndex += nIndex; + maVector.insert(aIndex, nCount, rValue); + } + } + + void insert(sal_uInt32 nIndex, const CoordinateDataArray2D& rSource) + { + const sal_uInt32 nCount(rSource.maVector.size()); + + if(nCount) + { + // insert data + auto aIndex = maVector.begin(); + aIndex += nIndex; + auto aStart = rSource.maVector.cbegin(); + auto aEnd = rSource.maVector.cend(); + maVector.insert(aIndex, aStart, aEnd); + } + } + + void remove(sal_uInt32 nIndex, sal_uInt32 nCount) + { + if(nCount) + { + // remove point data + auto aStart = maVector.begin(); + aStart += nIndex; + const auto aEnd = aStart + nCount; + maVector.erase(aStart, aEnd); + } + } + + void flip(bool bIsClosed) + { + if(maVector.size() <= 1) + return; + + // to keep the same point at index 0, just flip all points except the + // first one when closed + const sal_uInt32 nHalfSize(bIsClosed ? (maVector.size() - 1) >> 1 : maVector.size() >> 1); + auto aStart = bIsClosed ? maVector.begin() + 1 : maVector.begin(); + auto aEnd = maVector.end() - 1; + + for(sal_uInt32 a(0); a < nHalfSize; a++) + { + std::swap(*aStart, *aEnd); + ++aStart; + --aEnd; + } + } + + void removeDoublePointsAtBeginEnd() + { + // remove from end as long as there are at least two points + // and begin/end are equal + while((maVector.size() > 1) && (maVector[0] == maVector[maVector.size() - 1])) + { + maVector.pop_back(); + } + } + + void removeDoublePointsWholeTrack() + { + sal_uInt32 nIndex(0); + + // test as long as there are at least two points and as long as the index + // is smaller or equal second last point + while((maVector.size() > 1) && (nIndex <= maVector.size() - 2)) + { + if(maVector[nIndex] == maVector[nIndex + 1]) + { + // if next is same as index, delete next + maVector.erase(maVector.begin() + (nIndex + 1)); + } + else + { + // if different, step forward + nIndex++; + } + } + } + + void transform(const basegfx::B2DHomMatrix& rMatrix) + { + for (auto& point : maVector) + { + point *= rMatrix; + } + } +}; + +class ControlVectorPair2D +{ + basegfx::B2DVector maPrevVector; + basegfx::B2DVector maNextVector; + +public: + explicit ControlVectorPair2D() {} + + const basegfx::B2DVector& getPrevVector() const + { + return maPrevVector; + } + + void setPrevVector(const basegfx::B2DVector& rValue) + { + if(rValue != maPrevVector) + maPrevVector = rValue; + } + + const basegfx::B2DVector& getNextVector() const + { + return maNextVector; + } + + void setNextVector(const basegfx::B2DVector& rValue) + { + if(rValue != maNextVector) + maNextVector = rValue; + } + + bool operator==(const ControlVectorPair2D& rData) const + { + return (maPrevVector == rData.getPrevVector() && maNextVector == rData.getNextVector()); + } + + void flip() + { + std::swap(maPrevVector, maNextVector); + } +}; + +class ControlVectorArray2D +{ + typedef std::vector< ControlVectorPair2D > ControlVectorPair2DVector; + + ControlVectorPair2DVector maVector; + sal_uInt32 mnUsedVectors; + +public: + explicit ControlVectorArray2D(sal_uInt32 nCount) + : maVector(nCount), + mnUsedVectors(0) + {} + + ControlVectorArray2D(const ControlVectorArray2D& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount) + : mnUsedVectors(0) + { + ControlVectorPair2DVector::const_iterator aStart(rOriginal.maVector.begin()); + aStart += nIndex; + ControlVectorPair2DVector::const_iterator aEnd(aStart); + aEnd += nCount; + maVector.reserve(nCount); + + for(; aStart != aEnd; ++aStart) + { + if(!aStart->getPrevVector().equalZero()) + mnUsedVectors++; + + if(!aStart->getNextVector().equalZero()) + mnUsedVectors++; + + maVector.push_back(*aStart); + } + } + + bool operator==(const ControlVectorArray2D& rCandidate) const + { + return (maVector == rCandidate.maVector); + } + + bool isUsed() const + { + return (mnUsedVectors != 0); + } + + const basegfx::B2DVector& getPrevVector(sal_uInt32 nIndex) const + { + return maVector[nIndex].getPrevVector(); + } + + void setPrevVector(sal_uInt32 nIndex, const basegfx::B2DVector& rValue) + { + bool bWasUsed(mnUsedVectors && !maVector[nIndex].getPrevVector().equalZero()); + bool bIsUsed(!rValue.equalZero()); + + if(bWasUsed) + { + if(bIsUsed) + { + maVector[nIndex].setPrevVector(rValue); + } + else + { + maVector[nIndex].setPrevVector(basegfx::B2DVector::getEmptyVector()); + mnUsedVectors--; + } + } + else + { + if(bIsUsed) + { + maVector[nIndex].setPrevVector(rValue); + mnUsedVectors++; + } + } + } + + const basegfx::B2DVector& getNextVector(sal_uInt32 nIndex) const + { + return maVector[nIndex].getNextVector(); + } + + void setNextVector(sal_uInt32 nIndex, const basegfx::B2DVector& rValue) + { + bool bWasUsed(mnUsedVectors && !maVector[nIndex].getNextVector().equalZero()); + bool bIsUsed(!rValue.equalZero()); + + if(bWasUsed) + { + if(bIsUsed) + { + maVector[nIndex].setNextVector(rValue); + } + else + { + maVector[nIndex].setNextVector(basegfx::B2DVector::getEmptyVector()); + mnUsedVectors--; + } + } + else + { + if(bIsUsed) + { + maVector[nIndex].setNextVector(rValue); + mnUsedVectors++; + } + } + } + + void append(const ControlVectorPair2D& rValue) + { + maVector.push_back(rValue); + + if(!rValue.getPrevVector().equalZero()) + mnUsedVectors += 1; + + if(!rValue.getNextVector().equalZero()) + mnUsedVectors += 1; + } + + void insert(sal_uInt32 nIndex, const ControlVectorPair2D& rValue, sal_uInt32 nCount) + { + if(!nCount) + return; + + // add nCount copies of rValue + ControlVectorPair2DVector::iterator aIndex(maVector.begin()); + aIndex += nIndex; + maVector.insert(aIndex, nCount, rValue); + + if(!rValue.getPrevVector().equalZero()) + mnUsedVectors += nCount; + + if(!rValue.getNextVector().equalZero()) + mnUsedVectors += nCount; + } + + void insert(sal_uInt32 nIndex, const ControlVectorArray2D& rSource) + { + const sal_uInt32 nCount(rSource.maVector.size()); + + if(!nCount) + return; + + // insert data + ControlVectorPair2DVector::iterator aIndex(maVector.begin()); + aIndex += nIndex; + ControlVectorPair2DVector::const_iterator aStart(rSource.maVector.begin()); + ControlVectorPair2DVector::const_iterator aEnd(rSource.maVector.end()); + maVector.insert(aIndex, aStart, aEnd); + + for(; aStart != aEnd; ++aStart) + { + if(!aStart->getPrevVector().equalZero()) + mnUsedVectors++; + + if(!aStart->getNextVector().equalZero()) + mnUsedVectors++; + } + } + + void remove(sal_uInt32 nIndex, sal_uInt32 nCount) + { + if(!nCount) + return; + + const ControlVectorPair2DVector::iterator aDeleteStart(maVector.begin() + nIndex); + const ControlVectorPair2DVector::iterator aDeleteEnd(aDeleteStart + nCount); + ControlVectorPair2DVector::const_iterator aStart(aDeleteStart); + + for(; mnUsedVectors && aStart != aDeleteEnd; ++aStart) + { + if(!aStart->getPrevVector().equalZero()) + mnUsedVectors--; + + if(mnUsedVectors && !aStart->getNextVector().equalZero()) + mnUsedVectors--; + } + + // remove point data + maVector.erase(aDeleteStart, aDeleteEnd); + } + + void flip(bool bIsClosed) + { + if(maVector.size() <= 1) + return; + + // to keep the same point at index 0, just flip all points except the + // first one when closed + const sal_uInt32 nHalfSize(bIsClosed ? (maVector.size() - 1) >> 1 : maVector.size() >> 1); + ControlVectorPair2DVector::iterator aStart(bIsClosed ? maVector.begin() + 1 : maVector.begin()); + ControlVectorPair2DVector::iterator aEnd(maVector.end() - 1); + + for(sal_uInt32 a(0); a < nHalfSize; a++) + { + // swap Prev and Next + aStart->flip(); + aEnd->flip(); + + // swap entries + std::swap(*aStart, *aEnd); + + ++aStart; + --aEnd; + } + + if(aStart == aEnd) + { + // swap Prev and Next at middle element (if exists) + aStart->flip(); + } + + if(bIsClosed) + { + // swap Prev and Next at start element + maVector.begin()->flip(); + } + } +}; + +class ImplBufferedData : public basegfx::SystemDependentDataHolder +{ +private: + // Possibility to hold the last subdivision + std::optional< basegfx::B2DPolygon > mpDefaultSubdivision; + + // Possibility to hold the last B2DRange calculation + mutable std::optional< basegfx::B2DRange > moB2DRange; + +public: + ImplBufferedData() + { + } + + const basegfx::B2DPolygon& getDefaultAdaptiveSubdivision(const basegfx::B2DPolygon& rSource) const + { + if(!mpDefaultSubdivision) + { + const_cast< ImplBufferedData* >(this)->mpDefaultSubdivision = basegfx::utils::adaptiveSubdivideByAngle(rSource); + } + + return *mpDefaultSubdivision; + } + + const basegfx::B2DRange& getB2DRange(const basegfx::B2DPolygon& rSource) const + { + if(!moB2DRange) + { + basegfx::B2DRange aNewRange; + const sal_uInt32 nPointCount(rSource.count()); + + if(nPointCount) + { + for(sal_uInt32 a(0); a < nPointCount; a++) + { + aNewRange.expand(rSource.getB2DPoint(a)); + } + + if(rSource.areControlPointsUsed()) + { + const sal_uInt32 nEdgeCount(rSource.isClosed() ? nPointCount : nPointCount - 1); + + if(nEdgeCount) + { + basegfx::B2DCubicBezier aEdge; + aEdge.setStartPoint(rSource.getB2DPoint(0)); + + for(sal_uInt32 b(0); b < nEdgeCount; b++) + { + const sal_uInt32 nNextIndex((b + 1) % nPointCount); + aEdge.setControlPointA(rSource.getNextControlPoint(b)); + aEdge.setControlPointB(rSource.getPrevControlPoint(nNextIndex)); + aEdge.setEndPoint(rSource.getB2DPoint(nNextIndex)); + + if(aEdge.isBezier()) + { + const basegfx::B2DRange aBezierRangeWithControlPoints(aEdge.getRange()); + + if(!aNewRange.isInside(aBezierRangeWithControlPoints)) + { + // the range with control points of the current edge is not completely + // inside the current range without control points. Expand current range by + // subdividing the bezier segment. + // Ideal here is a subdivision at the extreme values, so use + // getAllExtremumPositions to get all extremas in one run + std::vector< double > aExtremas; + + aExtremas.reserve(4); + aEdge.getAllExtremumPositions(aExtremas); + + const sal_uInt32 nExtremaCount(aExtremas.size()); + + for(sal_uInt32 c(0); c < nExtremaCount; c++) + { + aNewRange.expand(aEdge.interpolatePoint(aExtremas[c])); + } + } + } + + // prepare next edge + aEdge.setStartPoint(aEdge.getEndPoint()); + } + } + } + } + + moB2DRange = aNewRange; + } + + return *moB2DRange; + } +}; + +} + +class ImplB2DPolygon +{ +private: + // The point vector. This vector exists always and defines the + // count of members. + CoordinateDataArray2D maPoints; + + // The control point vectors. This vectors are created on demand + // and may be zero. + std::optional< ControlVectorArray2D > moControlVector; + + // buffered data for e.g. default subdivision and range + std::unique_ptr< ImplBufferedData > mpBufferedData; + + // flag which decides if this polygon is opened or closed + bool mbIsClosed; + +public: + const basegfx::B2DPolygon& getDefaultAdaptiveSubdivision(const basegfx::B2DPolygon& rSource) const + { + if(!moControlVector || !moControlVector->isUsed()) + { + return rSource; + } + + if(!mpBufferedData) + { + const_cast< ImplB2DPolygon* >(this)->mpBufferedData.reset(new ImplBufferedData); + } + + return mpBufferedData->getDefaultAdaptiveSubdivision(rSource); + } + + const basegfx::B2DRange& getB2DRange(const basegfx::B2DPolygon& rSource) const + { + if(!mpBufferedData) + { + const_cast< ImplB2DPolygon* >(this)->mpBufferedData.reset(new ImplBufferedData); + } + + return mpBufferedData->getB2DRange(rSource); + } + + ImplB2DPolygon() + : maPoints(0), + mbIsClosed(false) + {} + + ImplB2DPolygon(const ImplB2DPolygon& rToBeCopied) + : maPoints(rToBeCopied.maPoints), + mbIsClosed(rToBeCopied.mbIsClosed) + { + // complete initialization using copy + if(rToBeCopied.moControlVector && rToBeCopied.moControlVector->isUsed()) + { + moControlVector.emplace( *rToBeCopied.moControlVector ); + } + } + + ImplB2DPolygon(const ImplB2DPolygon& rToBeCopied, sal_uInt32 nIndex, sal_uInt32 nCount) + : maPoints(rToBeCopied.maPoints, nIndex, nCount), + mbIsClosed(rToBeCopied.mbIsClosed) + { + // complete initialization using partly copy + if(rToBeCopied.moControlVector && rToBeCopied.moControlVector->isUsed()) + { + moControlVector.emplace( *rToBeCopied.moControlVector, nIndex, nCount ); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + } + + ImplB2DPolygon& operator=(const ImplB2DPolygon& rOther) + { + if (this != &rOther) + { + moControlVector.reset(); + mpBufferedData.reset(); + maPoints = rOther.maPoints; + mbIsClosed = rOther.mbIsClosed; + if (rOther.moControlVector && rOther.moControlVector->isUsed()) + { + moControlVector.emplace( *rOther.moControlVector ); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + } + return *this; + } + + sal_uInt32 count() const + { + return maPoints.count(); + } + + bool isClosed() const + { + return mbIsClosed; + } + + void setClosed(bool bNew) + { + if(bNew != mbIsClosed) + { + mpBufferedData.reset(); + mbIsClosed = bNew; + } + } + + bool operator==(const ImplB2DPolygon& rCandidate) const + { + if(mbIsClosed != rCandidate.mbIsClosed) + return false; + if(!(maPoints == rCandidate.maPoints)) + return false; + bool bControlVectorsAreEqual(true); + + if(moControlVector) + { + if(rCandidate.moControlVector) + { + bControlVectorsAreEqual = ((*moControlVector) == (*rCandidate.moControlVector)); + } + else + { + // candidate has no control vector, so it's assumed all unused. + bControlVectorsAreEqual = !moControlVector->isUsed(); + } + } + else + { + if(rCandidate.moControlVector) + { + // we have no control vector, so it's assumed all unused. + bControlVectorsAreEqual = !rCandidate.moControlVector->isUsed(); + } + } + + return bControlVectorsAreEqual; + } + + const basegfx::B2DPoint& getPoint(sal_uInt32 nIndex) const + { + return maPoints.getCoordinate(nIndex); + } + + void setPoint(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue) + { + mpBufferedData.reset(); + maPoints.setCoordinate(nIndex, rValue); + } + + void reserve(sal_uInt32 nCount) + { + maPoints.reserve(nCount); + } + + void append(const basegfx::B2DPoint& rPoint) + { + mpBufferedData.reset(); // TODO: is this needed? + const auto aCoordinate = rPoint; + maPoints.append(aCoordinate); + + if(moControlVector) + { + const ControlVectorPair2D aVectorPair; + moControlVector->append(aVectorPair); + } + } + + void insert(sal_uInt32 nIndex, const basegfx::B2DPoint& rPoint, sal_uInt32 nCount) + { + if(nCount) + { + mpBufferedData.reset(); + auto aCoordinate = rPoint; + maPoints.insert(nIndex, aCoordinate, nCount); + + if(moControlVector) + { + ControlVectorPair2D aVectorPair; + moControlVector->insert(nIndex, aVectorPair, nCount); + } + } + } + + const basegfx::B2DVector& getPrevControlVector(sal_uInt32 nIndex) const + { + if(moControlVector) + { + return moControlVector->getPrevVector(nIndex); + } + else + { + return basegfx::B2DVector::getEmptyVector(); + } + } + + void setPrevControlVector(sal_uInt32 nIndex, const basegfx::B2DVector& rValue) + { + if(!moControlVector) + { + if(!rValue.equalZero()) + { + mpBufferedData.reset(); + moControlVector.emplace(maPoints.count()); + moControlVector->setPrevVector(nIndex, rValue); + } + } + else + { + mpBufferedData.reset(); + moControlVector->setPrevVector(nIndex, rValue); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + } + + const basegfx::B2DVector& getNextControlVector(sal_uInt32 nIndex) const + { + if(moControlVector) + { + return moControlVector->getNextVector(nIndex); + } + else + { + return basegfx::B2DVector::getEmptyVector(); + } + } + + void setNextControlVector(sal_uInt32 nIndex, const basegfx::B2DVector& rValue) + { + if(!moControlVector) + { + if(!rValue.equalZero()) + { + mpBufferedData.reset(); + moControlVector.emplace(maPoints.count()); + moControlVector->setNextVector(nIndex, rValue); + } + } + else + { + mpBufferedData.reset(); + moControlVector->setNextVector(nIndex, rValue); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + } + + bool areControlPointsUsed() const + { + return (moControlVector && moControlVector->isUsed()); + } + + void resetControlVectors() + { + mpBufferedData.reset(); + moControlVector.reset(); + } + + void setControlVectors(sal_uInt32 nIndex, const basegfx::B2DVector& rPrev, const basegfx::B2DVector& rNext) + { + setPrevControlVector(nIndex, rPrev); + setNextControlVector(nIndex, rNext); + } + + void appendBezierSegment(const basegfx::B2DVector& rNext, const basegfx::B2DVector& rPrev, const basegfx::B2DPoint& rPoint) + { + mpBufferedData.reset(); + const sal_uInt32 nCount(maPoints.count()); + + if(nCount) + { + setNextControlVector(nCount - 1, rNext); + } + + insert(nCount, rPoint, 1); + setPrevControlVector(nCount, rPrev); + } + + void insert(sal_uInt32 nIndex, const ImplB2DPolygon& rSource) + { + const sal_uInt32 nCount(rSource.maPoints.count()); + + if(!nCount) + return; + + mpBufferedData.reset(); + + if(rSource.moControlVector && rSource.moControlVector->isUsed() && !moControlVector) + { + moControlVector.emplace(maPoints.count()); + } + + maPoints.insert(nIndex, rSource.maPoints); + + if(rSource.moControlVector) + { + moControlVector->insert(nIndex, *rSource.moControlVector); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + else if(moControlVector) + { + ControlVectorPair2D aVectorPair; + moControlVector->insert(nIndex, aVectorPair, nCount); + } + } + + void remove(sal_uInt32 nIndex, sal_uInt32 nCount) + { + if(!nCount) + return; + + mpBufferedData.reset(); + maPoints.remove(nIndex, nCount); + + if(moControlVector) + { + moControlVector->remove(nIndex, nCount); + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + } + + void flip() + { + if(maPoints.count() <= 1) + return; + + mpBufferedData.reset(); + + // flip points + maPoints.flip(mbIsClosed); + + if(moControlVector) + { + // flip control vector + moControlVector->flip(mbIsClosed); + } + } + + bool hasDoublePoints() const + { + if(mbIsClosed) + { + // check for same start and end point + const sal_uInt32 nIndex(maPoints.count() - 1); + + if(maPoints.getCoordinate(0) == maPoints.getCoordinate(nIndex)) + { + if(moControlVector) + { + if(moControlVector->getNextVector(nIndex).equalZero() && moControlVector->getPrevVector(0).equalZero()) + { + return true; + } + } + else + { + return true; + } + } + } + + // test for range + for(sal_uInt32 a(0); a < maPoints.count() - 1; a++) + { + if(maPoints.getCoordinate(a) == maPoints.getCoordinate(a + 1)) + { + if(moControlVector) + { + if(moControlVector->getNextVector(a).equalZero() && moControlVector->getPrevVector(a + 1).equalZero()) + { + return true; + } + } + else + { + return true; + } + } + } + + return false; + } + + void removeDoublePointsAtBeginEnd() + { + // Only remove DoublePoints at Begin and End when poly is closed + if(!mbIsClosed) + return; + + mpBufferedData.reset(); + + if(moControlVector) + { + bool bRemove; + + do + { + bRemove = false; + + if(maPoints.count() > 1) + { + const sal_uInt32 nIndex(maPoints.count() - 1); + + if(maPoints.getCoordinate(0) == maPoints.getCoordinate(nIndex)) + { + if(moControlVector) + { + if(moControlVector->getNextVector(nIndex).equalZero() && moControlVector->getPrevVector(0).equalZero()) + { + bRemove = true; + } + } + else + { + bRemove = true; + } + } + } + + if(bRemove) + { + const sal_uInt32 nIndex(maPoints.count() - 1); + + if(moControlVector && !moControlVector->getPrevVector(nIndex).equalZero()) + { + moControlVector->setPrevVector(0, moControlVector->getPrevVector(nIndex)); + } + + remove(nIndex, 1); + } + } + while(bRemove); + } + else + { + maPoints.removeDoublePointsAtBeginEnd(); + } + } + + void removeDoublePointsWholeTrack() + { + mpBufferedData.reset(); + + if(moControlVector) + { + sal_uInt32 nIndex(0); + + // test as long as there are at least two points and as long as the index + // is smaller or equal second last point + while((maPoints.count() > 1) && (nIndex <= maPoints.count() - 2)) + { + bool bRemove(maPoints.getCoordinate(nIndex) == maPoints.getCoordinate(nIndex + 1)); + + if(bRemove && moControlVector) + { + if(!moControlVector->getNextVector(nIndex).equalZero() || !moControlVector->getPrevVector(nIndex + 1).equalZero()) + { + bRemove = false; + } + } + + if(bRemove) + { + if(moControlVector && !moControlVector->getPrevVector(nIndex).equalZero()) + { + moControlVector->setPrevVector(nIndex + 1, moControlVector->getPrevVector(nIndex)); + } + + // if next is same as index and the control vectors are unused, delete index + remove(nIndex, 1); + } + else + { + // if different, step forward + nIndex++; + } + } + } + else + { + maPoints.removeDoublePointsWholeTrack(); + } + } + + void transform(const basegfx::B2DHomMatrix& rMatrix) + { + mpBufferedData.reset(); + + if(moControlVector) + { + for(sal_uInt32 a(0); a < maPoints.count(); a++) + { + basegfx::B2DPoint aCandidate = maPoints.getCoordinate(a); + + if(moControlVector->isUsed()) + { + const basegfx::B2DVector& rPrevVector(moControlVector->getPrevVector(a)); + const basegfx::B2DVector& rNextVector(moControlVector->getNextVector(a)); + + if(!rPrevVector.equalZero()) + { + basegfx::B2DVector aPrevVector(rMatrix * rPrevVector); + moControlVector->setPrevVector(a, aPrevVector); + } + + if(!rNextVector.equalZero()) + { + basegfx::B2DVector aNextVector(rMatrix * rNextVector); + moControlVector->setNextVector(a, aNextVector); + } + } + + aCandidate *= rMatrix; + maPoints.setCoordinate(a, aCandidate); + } + + if(!moControlVector->isUsed()) + moControlVector.reset(); + } + else + { + maPoints.transform(rMatrix); + } + } + + void addOrReplaceSystemDependentData(basegfx::SystemDependentData_SharedPtr& rData) + { + if(!mpBufferedData) + { + mpBufferedData.reset(new ImplBufferedData); + } + + mpBufferedData->addOrReplaceSystemDependentData(rData); + } + + basegfx::SystemDependentData_SharedPtr getSystemDependentData(size_t hash_code) const + { + if(mpBufferedData) + { + return mpBufferedData->getSystemDependentData(hash_code); + } + + return basegfx::SystemDependentData_SharedPtr(); + } +}; + +namespace basegfx +{ + B2DPolygon::B2DPolygon() = default; + + B2DPolygon::B2DPolygon(std::initializer_list<basegfx::B2DPoint> aPoints) + { + for (const basegfx::B2DPoint& rPoint : aPoints) + { + append(rPoint); + } + } + + B2DPolygon::B2DPolygon(const B2DPolygon&) = default; + + B2DPolygon::B2DPolygon(B2DPolygon&&) = default; + + B2DPolygon::B2DPolygon(const B2DPolygon& rPolygon, sal_uInt32 nIndex, sal_uInt32 nCount) + : mpPolygon(ImplB2DPolygon(*rPolygon.mpPolygon, nIndex, nCount)) + { + // TODO(P2): one extra temporary here (cow_wrapper copies + // given ImplB2DPolygon into its internal impl_t wrapper type) + OSL_ENSURE(nIndex + nCount <= rPolygon.mpPolygon->count(), "B2DPolygon constructor outside range (!)"); + } + + B2DPolygon::~B2DPolygon() = default; + + B2DPolygon& B2DPolygon::operator=(const B2DPolygon&) = default; + + B2DPolygon& B2DPolygon::operator=(B2DPolygon&&) = default; + + void B2DPolygon::makeUnique() + { + mpPolygon.make_unique(); + } + + bool B2DPolygon::operator==(const B2DPolygon& rPolygon) const + { + if(mpPolygon.same_object(rPolygon.mpPolygon)) + return true; + + return ((*mpPolygon) == (*rPolygon.mpPolygon)); + } + + bool B2DPolygon::operator!=(const B2DPolygon& rPolygon) const + { + return !(*this == rPolygon); + } + + sal_uInt32 B2DPolygon::count() const + { + return mpPolygon->count(); + } + + B2DPoint const & B2DPolygon::getB2DPoint(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + return mpPolygon->getPoint(nIndex); + } + + void B2DPolygon::setB2DPoint(sal_uInt32 nIndex, const B2DPoint& rValue) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + + if(std::as_const(mpPolygon)->getPoint(nIndex) != rValue) + { + mpPolygon->setPoint(nIndex, rValue); + } + } + + void B2DPolygon::reserve(sal_uInt32 nCount) + { + mpPolygon->reserve(nCount); + } + + void B2DPolygon::insert(sal_uInt32 nIndex, const B2DPoint& rPoint, sal_uInt32 nCount) + { + OSL_ENSURE(nIndex <= std::as_const(mpPolygon)->count(), "B2DPolygon Insert outside range (!)"); + + if(nCount) + { + mpPolygon->insert(nIndex, rPoint, nCount); + } + } + + void B2DPolygon::append(const B2DPoint& rPoint, sal_uInt32 nCount) + { + if(nCount) + { + mpPolygon->insert(std::as_const(mpPolygon)->count(), rPoint, nCount); + } + } + + void B2DPolygon::append(const B2DPoint& rPoint) + { + mpPolygon->append(rPoint); + } + + B2DPoint B2DPolygon::getPrevControlPoint(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + if(mpPolygon->areControlPointsUsed()) + { + return mpPolygon->getPoint(nIndex) + mpPolygon->getPrevControlVector(nIndex); + } + else + { + return mpPolygon->getPoint(nIndex); + } + } + + B2DPoint B2DPolygon::getNextControlPoint(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + if(mpPolygon->areControlPointsUsed()) + { + return mpPolygon->getPoint(nIndex) + mpPolygon->getNextControlVector(nIndex); + } + else + { + return mpPolygon->getPoint(nIndex); + } + } + + void B2DPolygon::setPrevControlPoint(sal_uInt32 nIndex, const B2DPoint& rValue) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + const basegfx::B2DVector aNewVector(rValue - std::as_const(mpPolygon)->getPoint(nIndex)); + + if(std::as_const(mpPolygon)->getPrevControlVector(nIndex) != aNewVector) + { + mpPolygon->setPrevControlVector(nIndex, aNewVector); + } + } + + void B2DPolygon::setNextControlPoint(sal_uInt32 nIndex, const B2DPoint& rValue) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + const basegfx::B2DVector aNewVector(rValue - std::as_const(mpPolygon)->getPoint(nIndex)); + + if(std::as_const(mpPolygon)->getNextControlVector(nIndex) != aNewVector) + { + mpPolygon->setNextControlVector(nIndex, aNewVector); + } + } + + void B2DPolygon::setControlPoints(sal_uInt32 nIndex, const basegfx::B2DPoint& rPrev, const basegfx::B2DPoint& rNext) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + const B2DPoint aPoint(std::as_const(mpPolygon)->getPoint(nIndex)); + const basegfx::B2DVector aNewPrev(rPrev - aPoint); + const basegfx::B2DVector aNewNext(rNext - aPoint); + + if(std::as_const(mpPolygon)->getPrevControlVector(nIndex) != aNewPrev || std::as_const(mpPolygon)->getNextControlVector(nIndex) != aNewNext) + { + mpPolygon->setControlVectors(nIndex, aNewPrev, aNewNext); + } + } + + void B2DPolygon::resetPrevControlPoint(sal_uInt32 nIndex) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + + if(std::as_const(mpPolygon)->areControlPointsUsed() && !std::as_const(mpPolygon)->getPrevControlVector(nIndex).equalZero()) + { + mpPolygon->setPrevControlVector(nIndex, B2DVector::getEmptyVector()); + } + } + + void B2DPolygon::resetNextControlPoint(sal_uInt32 nIndex) + { + OSL_ENSURE(nIndex < std::as_const(mpPolygon)->count(), "B2DPolygon access outside range (!)"); + + if(std::as_const(mpPolygon)->areControlPointsUsed() && !std::as_const(mpPolygon)->getNextControlVector(nIndex).equalZero()) + { + mpPolygon->setNextControlVector(nIndex, B2DVector::getEmptyVector()); + } + } + + void B2DPolygon::resetControlPoints() + { + if(std::as_const(mpPolygon)->areControlPointsUsed()) + { + mpPolygon->resetControlVectors(); + } + } + + void B2DPolygon::appendBezierSegment( + const B2DPoint& rNextControlPoint, + const B2DPoint& rPrevControlPoint, + const B2DPoint& rPoint) + { + const B2DVector aNewNextVector(std::as_const(mpPolygon)->count() ? B2DVector(rNextControlPoint - std::as_const(mpPolygon)->getPoint(std::as_const(mpPolygon)->count() - 1)) : B2DVector::getEmptyVector()); + const B2DVector aNewPrevVector(rPrevControlPoint - rPoint); + + if(aNewNextVector.equalZero() && aNewPrevVector.equalZero()) + { + mpPolygon->insert(std::as_const(mpPolygon)->count(), rPoint, 1); + } + else + { + mpPolygon->appendBezierSegment(aNewNextVector, aNewPrevVector, rPoint); + } + } + + void B2DPolygon::appendQuadraticBezierSegment(const B2DPoint& rControlPoint, const B2DPoint& rPoint) + { + if (std::as_const(mpPolygon)->count() == 0) + { + mpPolygon->append(rPoint); + const double nX((rControlPoint.getX() * 2.0 + rPoint.getX()) / 3.0); + const double nY((rControlPoint.getY() * 2.0 + rPoint.getY()) / 3.0); + setPrevControlPoint(0, B2DPoint(nX, nY)); + } + else + { + const B2DPoint aPreviousPoint(std::as_const(mpPolygon)->getPoint(std::as_const(mpPolygon)->count() - 1)); + + const double nX1((rControlPoint.getX() * 2.0 + aPreviousPoint.getX()) / 3.0); + const double nY1((rControlPoint.getY() * 2.0 + aPreviousPoint.getY()) / 3.0); + const double nX2((rControlPoint.getX() * 2.0 + rPoint.getX()) / 3.0); + const double nY2((rControlPoint.getY() * 2.0 + rPoint.getY()) / 3.0); + + appendBezierSegment(B2DPoint(nX1, nY1), B2DPoint(nX2, nY2), rPoint); + } + } + + bool B2DPolygon::areControlPointsUsed() const + { + return mpPolygon->areControlPointsUsed(); + } + + bool B2DPolygon::isPrevControlPointUsed(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + return (mpPolygon->areControlPointsUsed() && !mpPolygon->getPrevControlVector(nIndex).equalZero()); + } + + bool B2DPolygon::isNextControlPointUsed(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + return (mpPolygon->areControlPointsUsed() && !mpPolygon->getNextControlVector(nIndex).equalZero()); + } + + B2VectorContinuity B2DPolygon::getContinuityInPoint(sal_uInt32 nIndex) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + + if(mpPolygon->areControlPointsUsed()) + { + const B2DVector& rPrev(mpPolygon->getPrevControlVector(nIndex)); + const B2DVector& rNext(mpPolygon->getNextControlVector(nIndex)); + + return getContinuity(rPrev, rNext); + } + else + { + return B2VectorContinuity::NONE; + } + } + + void B2DPolygon::getBezierSegment(sal_uInt32 nIndex, B2DCubicBezier& rTarget) const + { + OSL_ENSURE(nIndex < mpPolygon->count(), "B2DPolygon access outside range (!)"); + const bool bNextIndexValidWithoutClose(nIndex + 1 < mpPolygon->count()); + + if(bNextIndexValidWithoutClose || mpPolygon->isClosed()) + { + const sal_uInt32 nNextIndex(bNextIndexValidWithoutClose ? nIndex + 1 : 0); + rTarget.setStartPoint(mpPolygon->getPoint(nIndex)); + rTarget.setEndPoint(mpPolygon->getPoint(nNextIndex)); + + if(mpPolygon->areControlPointsUsed()) + { + rTarget.setControlPointA(rTarget.getStartPoint() + mpPolygon->getNextControlVector(nIndex)); + rTarget.setControlPointB(rTarget.getEndPoint() + mpPolygon->getPrevControlVector(nNextIndex)); + } + else + { + // no bezier, reset control points at rTarget + rTarget.setControlPointA(rTarget.getStartPoint()); + rTarget.setControlPointB(rTarget.getEndPoint()); + } + } + else + { + // no valid edge at all, reset rTarget to current point + const B2DPoint aPoint(mpPolygon->getPoint(nIndex)); + rTarget.setStartPoint(aPoint); + rTarget.setEndPoint(aPoint); + rTarget.setControlPointA(aPoint); + rTarget.setControlPointB(aPoint); + } + } + + B2DPolygon const & B2DPolygon::getDefaultAdaptiveSubdivision() const + { + return mpPolygon->getDefaultAdaptiveSubdivision(*this); + } + + B2DRange const & B2DPolygon::getB2DRange() const + { + return mpPolygon->getB2DRange(*this); + } + + void B2DPolygon::append(const B2DPolygon& rPoly, sal_uInt32 nIndex, sal_uInt32 nCount) + { + if(!rPoly.count()) + return; + + if(!nCount) + { + nCount = rPoly.count(); + } + + if(nIndex == 0 && nCount == rPoly.count()) + { + mpPolygon->insert(std::as_const(mpPolygon)->count(), *rPoly.mpPolygon); + } + else + { + OSL_ENSURE(nIndex + nCount <= rPoly.mpPolygon->count(), "B2DPolygon Append outside range (!)"); + ImplB2DPolygon aTempPoly(*rPoly.mpPolygon, nIndex, nCount); + mpPolygon->insert(std::as_const(mpPolygon)->count(), aTempPoly); + } + } + + void B2DPolygon::remove(sal_uInt32 nIndex, sal_uInt32 nCount) + { + OSL_ENSURE(nIndex + nCount <= std::as_const(mpPolygon)->count(), "B2DPolygon Remove outside range (!)"); + + if(nCount) + { + mpPolygon->remove(nIndex, nCount); + } + } + + void B2DPolygon::clear() + { + *mpPolygon = ImplB2DPolygon(); + } + + bool B2DPolygon::isClosed() const + { + return mpPolygon->isClosed(); + } + + void B2DPolygon::setClosed(bool bNew) + { + if(isClosed() != bNew) + { + mpPolygon->setClosed(bNew); + } + } + + void B2DPolygon::flip() + { + if(count() > 1) + { + mpPolygon->flip(); + } + } + + bool B2DPolygon::hasDoublePoints() const + { + return (mpPolygon->count() > 1 && mpPolygon->hasDoublePoints()); + } + + void B2DPolygon::removeDoublePoints() + { + if(hasDoublePoints()) + { + mpPolygon->removeDoublePointsAtBeginEnd(); + mpPolygon->removeDoublePointsWholeTrack(); + } + } + + void B2DPolygon::transform(const B2DHomMatrix& rMatrix) + { + if(std::as_const(mpPolygon)->count() && !rMatrix.isIdentity()) + { + mpPolygon->transform(rMatrix); + } + } + + void B2DPolygon::addOrReplaceSystemDependentDataInternal(SystemDependentData_SharedPtr& rData) const + { + // Need to get ImplB2DPolygon* from cow_wrapper *without* + // calling make_unique() here - we do not want to + // 'modify' the ImplB2DPolygon, but add buffered data that + // is valid for all referencing instances + const B2DPolygon* pMe(this); + const ImplB2DPolygon* pMyImpl(pMe->mpPolygon.get()); + + const_cast<ImplB2DPolygon*>(pMyImpl)->addOrReplaceSystemDependentData(rData); + } + + SystemDependentData_SharedPtr B2DPolygon::getSystemDependantDataInternal(size_t hash_code) const + { + return mpPolygon->getSystemDependentData(hash_code); + } + +} // end of namespace basegfx + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |