Teach LibreOffice proper svg:d support

4 files changed, 322 insertions, 1 deletions

diff --git a/basegfx/inc/basegfx/tools/unotools.hxx b/basegfx/inc/basegfx/tools/unotools.hxx
new file mode 100644
index 0000000000..e7bcc27fb5
--- /dev/null
+++ b/basegfx/inc/basegfx/tools/unotools.hxx
@@ -0,0 +1,55 @@
+/*
+ * Version: MPL 1.1 / GPLv3+ / LGPLv3+
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License or as specified alternatively below. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Initial Developer of the Original Code is
+ *       Thorsten Behrens <tbehrens@novell.com>
+ * Portions created by the Initial Developer are Copyright (C) 2011 the
+ * Initial Developer. All Rights Reserved.
+ *
+ * For minor contributions see the git repository.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
+ * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
+ * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
+ * instead of those above.
+ */
+
+#ifndef INCLUDED_BASEGFX_UNOTOOLS_HXX
+#define INCLUDED_BASEGFX_UNOTOOLS_HXX
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase3.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/rendering/FillRule.hpp>
+#include <com/sun/star/rendering/XLinePolyPolygon2D.hpp>
+#include <com/sun/star/rendering/XBezierPolyPolygon2D.hpp>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+
+
+namespace basegfx
+{
+class B2DPolyPolygon;
+
+namespace unotools
+{
+
+    B2DPolyPolygon polyPolygonBezierToB2DPolyPolygon(const ::com::sun::star::drawing::PolyPolygonBezierCoords& rSourcePolyPolygon)
+        throw( ::com::sun::star::lang::IllegalArgumentException );
+
+    void b2DPolyPolygonToPolyPolygonBezier( const B2DPolyPolygon& rPolyPoly,
+                                            ::com::sun::star::drawing::PolyPolygonBezierCoords& rRetval );
+}
+}
+
+#endif /* INCLUDED_BASEGFX_UNOTOOLS_HXX */
diff --git a/basegfx/prj/d.lst b/basegfx/prj/d.lst
index dd4a2d8aed..06888a8e5e 100644
--- a/basegfx/prj/d.lst
+++ b/basegfx/prj/d.lst
@@ -93,6 +93,7 @@ mkdir: %_DEST%\inc\basegfx\tools
 ..\inc\basegfx\tools\keystoplerp.hxx %_DEST%\inc\basegfx\tools\keystoplerp.hxx
 ..\inc\basegfx\tools\lerp.hxx %_DEST%\inc\basegfx\tools\lerp.hxx
 ..\inc\basegfx\tools\unopolypolygon.hxx %_DEST%\inc\basegfx\tools\unopolypolygon.hxx
+..\inc\basegfx\tools\unotools.hxx %_DEST%\inc%_EXT%\basegfx\tools\unotools.hxx
 ..\inc\basegfx\tools\b2dclipstate.hxx %_DEST%\inc\basegfx\tools\b2dclipstate.hxx
 ..\inc\basegfx\tools\rectcliptools.hxx %_DEST%\inc\basegfx\tools\rectcliptools.hxx
 ..\inc\basegfx\tools\tools.hxx %_DEST%\inc\basegfx\tools\tools.hxx
diff --git a/basegfx/source/tools/makefile.mk b/basegfx/source/tools/makefile.mk
index 0a0977f730..6023a327a6 100755
--- a/basegfx/source/tools/makefile.mk
+++ b/basegfx/source/tools/makefile.mk
@@ -44,7 +44,8 @@ SLOFILES= $(SLO)$/b2dclipstate.obj	\
           $(SLO)$/keystoplerp.obj	\
           $(SLO)$/liangbarsky.obj	\
           $(SLO)$/tools.obj		    \
-          $(SLO)$/unopolypolygon.obj
+          $(SLO)$/unopolypolygon.obj\
+          $(SLO)$/unotools.obj
 
 # --- Targets ----------------------------------
 
diff --git a/basegfx/source/tools/unotools.cxx b/basegfx/source/tools/unotools.cxx
new file mode 100644
index 0000000000..710568b8d7
--- /dev/null
+++ b/basegfx/source/tools/unotools.cxx
@@ -0,0 +1,264 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * Portions Copright 2011 Thorsten Behrens <tbehrens@novell.com>
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_basegfx.hxx"
+
+#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(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 -> 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 - 1L : 0L ));
+
+            std::vector<awt::Point> aPoints; aPoints.reserve(nLoopCount);
+            std::vector<drawing::PolygonFlags> aFlags; aFlags.reserve(nLoopCount);
+
+            // prepare insert index and current point
+            basegfx::B2DCubicBezier aBezier;
+            aBezier.setStartPoint(rPoly.getB2DPoint(0));
+
+            for(sal_uInt32 b(0L); 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::CONTINUITY_C1 == eCont)
+                    {
+                        aFlags[nStartPointIndex] = drawing::PolygonFlags_SMOOTH;
+                    }
+                    else if(basegfx::CONTINUITY_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 - 1L));
+                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);
+        }
+    }
+
+}
+}