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/* -*- 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 <com/sun/star/drawing/PolyPolygonBezierCoords.hpp>
#include <com/sun/star/drawing/PointSequence.hpp>
#include <com/sun/star/drawing/FlagSequence.hpp>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/curve/b2dcubicbezier.hxx>
#include <basegfx/tools/unotools.hxx>
#include <comphelper/sequence.hxx>
using namespace ::com::sun::star;
namespace basegfx
{
namespace unotools
{
B2DPolyPolygon polyPolygonBezierToB2DPolyPolygon(const drawing::PolyPolygonBezierCoords& rSourcePolyPolygon)
throw( lang::IllegalArgumentException )
{
const sal_Int32 nOuterSequenceCount(rSourcePolyPolygon.Coordinates.getLength());
B2DPolyPolygon aNewPolyPolygon;
if(rSourcePolyPolygon.Flags.getLength() != nOuterSequenceCount)
throw lang::IllegalArgumentException();
// get pointers to inner sequence
const drawing::PointSequence* pInnerSequence = rSourcePolyPolygon.Coordinates.getConstArray();
const drawing::FlagSequence* pInnerSequenceFlags = rSourcePolyPolygon.Flags.getConstArray();
for(sal_Int32 a(0); a < nOuterSequenceCount; a++)
{
const sal_Int32 nInnerSequenceCount(pInnerSequence->getLength());
if (!nInnerSequenceCount)
throw lang::IllegalArgumentException();
if (pInnerSequenceFlags->getLength() != nInnerSequenceCount)
throw lang::IllegalArgumentException();
// prepare new polygon
basegfx::B2DPolygon aNewPolygon;
const awt::Point* pArray = pInnerSequence->getConstArray();
const drawing::PolygonFlags* pArrayFlags = pInnerSequenceFlags->getConstArray();
// get first point and flag
basegfx::B2DPoint aNewCoordinatePair(pArray->X, pArray->Y); pArray++;
drawing::PolygonFlags ePolyFlag(*pArrayFlags); pArrayFlags++;
basegfx::B2DPoint aControlA;
basegfx::B2DPoint aControlB;
// first point is not allowed to be a control point
if(drawing::PolygonFlags_CONTROL == ePolyFlag)
throw lang::IllegalArgumentException();
// add first point as start point
aNewPolygon.append(aNewCoordinatePair);
for(sal_Int32 b(1); b < nInnerSequenceCount;)
{
// prepare loop
bool bControlA(false);
bool bControlB(false);
// get next point and flag
aNewCoordinatePair = basegfx::B2DPoint(pArray->X, pArray->Y);
ePolyFlag = *pArrayFlags;
pArray++; pArrayFlags++; b++;
if(b < nInnerSequenceCount && drawing::PolygonFlags_CONTROL == ePolyFlag)
{
aControlA = aNewCoordinatePair;
bControlA = true;
// get next point and flag
aNewCoordinatePair = basegfx::B2DPoint(pArray->X, pArray->Y);
ePolyFlag = *pArrayFlags;
pArray++; pArrayFlags++; b++;
}
if(b < nInnerSequenceCount && drawing::PolygonFlags_CONTROL == ePolyFlag)
{
aControlB = aNewCoordinatePair;
bControlB = true;
// get next point and flag
aNewCoordinatePair = basegfx::B2DPoint(pArray->X, pArray->Y);
ePolyFlag = *pArrayFlags;
pArray++; pArrayFlags++; b++;
}
// two or no control points are consumed, another one would be an error.
// It's also an error if only one control point was read
if(drawing::PolygonFlags_CONTROL == ePolyFlag || bControlA != bControlB)
throw lang::IllegalArgumentException();
// the previous writes used the B2DPolyPoygon -> tools::PolyPolygon converter
// which did not create minimal PolyPolygons, but created all control points
// as null vectors (identical points). Because of the former P(CA)(CB)-norm of
// B2DPolygon and it's unused sign of being the zero-vector and CA and CB being
// relative to P, an empty edge was exported as P == CA == CB. Luckily, the new
// export format can be read without errors by the old OOo-versions, so we need only
// to correct here at read and do not need to export a wrong but compatible version
// for the future.
if(bControlA
&& aControlA.equal(aControlB)
&& aControlA.equal(aNewPolygon.getB2DPoint(aNewPolygon.count() - 1)))
{
bControlA = bControlB = false;
}
if(bControlA)
{
// add bezier edge
aNewPolygon.appendBezierSegment(aControlA, aControlB, aNewCoordinatePair);
}
else
{
// add edge
aNewPolygon.append(aNewCoordinatePair);
}
}
// next sequence
pInnerSequence++;
pInnerSequenceFlags++;
// #i72807# API import uses old line start/end-equal definition for closed,
// so we need to correct this to closed state here
basegfx::tools::checkClosed(aNewPolygon);
// add new subpolygon
aNewPolyPolygon.append(aNewPolygon);
}
return aNewPolyPolygon;
}
void b2DPolyPolygonToPolyPolygonBezier( const basegfx::B2DPolyPolygon& rPolyPoly,
drawing::PolyPolygonBezierCoords& rRetval )
{
rRetval.Coordinates.realloc(rPolyPoly.count());
rRetval.Flags.realloc(rPolyPoly.count());
drawing::PointSequence* pOuterSequence = rRetval.Coordinates.getArray();
drawing::FlagSequence* pOuterFlags = rRetval.Flags.getArray();
for(sal_uInt32 a=0;a<rPolyPoly.count();a++)
{
const B2DPolygon& rPoly = rPolyPoly.getB2DPolygon(a);
sal_uInt32 nCount(rPoly.count());
const bool bClosed(rPoly.isClosed());
// calculate input vertex count
const sal_uInt32 nLoopCount(bClosed ? nCount : (nCount ? nCount - 1 : 0 ));
std::vector<awt::Point> aPoints; aPoints.reserve(nLoopCount);
std::vector<drawing::PolygonFlags> aFlags; aFlags.reserve(nLoopCount);
if( nCount )
{
// prepare insert index and current point
basegfx::B2DCubicBezier aBezier;
aBezier.setStartPoint(rPoly.getB2DPoint(0));
for(sal_uInt32 b(0); b<nLoopCount; b++)
{
// add current point (always) and remember StartPointIndex for evtl. later corrections
const awt::Point aStartPoint(fround(aBezier.getStartPoint().getX()),
fround(aBezier.getStartPoint().getY()));
const sal_uInt32 nStartPointIndex(aPoints.size());
aPoints.push_back(aStartPoint);
aFlags.push_back(drawing::PolygonFlags_NORMAL);
// prepare next segment
const sal_uInt32 nNextIndex((b + 1) % nCount);
aBezier.setEndPoint(rPoly.getB2DPoint(nNextIndex));
aBezier.setControlPointA(rPoly.getNextControlPoint(b));
aBezier.setControlPointB(rPoly.getPrevControlPoint(nNextIndex));
if(aBezier.isBezier())
{
// if one is used, add always two control points due to the old schema
aPoints.push_back( awt::Point(fround(aBezier.getControlPointA().getX()),
fround(aBezier.getControlPointA().getY())) );
aFlags.push_back(drawing::PolygonFlags_CONTROL);
aPoints.push_back( awt::Point(fround(aBezier.getControlPointB().getX()),
fround(aBezier.getControlPointB().getY())) );
aFlags.push_back(drawing::PolygonFlags_CONTROL);
}
// test continuity with previous control point to set flag value
if(aBezier.getControlPointA() != aBezier.getStartPoint() && (bClosed || b))
{
const basegfx::B2VectorContinuity eCont(rPoly.getContinuityInPoint(b));
if(basegfx::B2VectorContinuity::C1 == eCont)
{
aFlags[nStartPointIndex] = drawing::PolygonFlags_SMOOTH;
}
else if(basegfx::B2VectorContinuity::C2 == eCont)
{
aFlags[nStartPointIndex] = drawing::PolygonFlags_SYMMETRIC;
}
}
// prepare next polygon step
aBezier.setStartPoint(aBezier.getEndPoint());
}
if(bClosed)
{
// add first point again as closing point due to old definition
aPoints.push_back( aPoints[0] );
aFlags.push_back(drawing::PolygonFlags_NORMAL);
}
else
{
// add last point as closing point
const basegfx::B2DPoint aClosingPoint(rPoly.getB2DPoint(nCount - 1));
const awt::Point aEnd(fround(aClosingPoint.getX()),
fround(aClosingPoint.getY()));
aPoints.push_back(aEnd);
aFlags.push_back(drawing::PolygonFlags_NORMAL);
}
}
*pOuterSequence++ = comphelper::containerToSequence(aPoints);
*pOuterFlags++ = comphelper::containerToSequence(aFlags);
}
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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