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drawingML export: make WritePolyPolygon robuster

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Make sure a:cubicBezTo conatins three a:pt elements.

escherex: It seems a cubic bezier curve last point has
a POLY_NORMAL flag and not POLY_CONTROL.

Change-Id: Id6dc2160c7ae171a720e4a1aa9161cef2b3b9413
This commit is contained in:
Zolnai Tamás
2014-02-16 17:37:13 +01:00
parent 6357031a32
commit c7c761455f
2 changed files with 23 additions and 34 deletions
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2
filter/source/msfilter/escherex.cxx
View File

@@ -1969,7 +1969,7 @@ PolyPolygon EscherPropertyContainer::GetPolyPolygon( const ::com::sun::star::uno
{
aPolygon.SetFlags( nPointIndex, POLY_CONTROL);
aPolygon.SetFlags( nPointIndex+1, POLY_CONTROL);
aPolygon.SetFlags( nPointIndex+2, POLY_CONTROL);
aPolygon.SetFlags( nPointIndex+2, POLY_NORMAL);
nPointIndex += 3;
break;
}

55
oox/source/export/drawingml.cxx
View File

@@ -1793,7 +1793,6 @@ void DrawingML::WritePolyPolygon( const PolyPolygon& rPolyPolygon )
const Polygon& rPoly = rPolyPolygon[ i ];
Rectangle aRect( rPoly.GetBoundRect() );
sal_Bool bBezier = sal_False;
mpFS->startElementNS( XML_a, XML_path,
XML_w, I64S( aRect.GetWidth() ),
@@ -1812,46 +1811,36 @@ void DrawingML::WritePolyPolygon( const PolyPolygon& rPolyPolygon )
mpFS->endElementNS( XML_a, XML_moveTo );
}
sal_Int32 nCounter = 0 ;
for( sal_uInt16 j = 1; j < rPoly.GetSize(); j ++ )
{
enum PolyFlags flags = rPoly.GetFlags(j);
if( flags == POLY_CONTROL && !bBezier )
if( flags == POLY_CONTROL )
{
mpFS->startElementNS( XML_a, XML_cubicBezTo, FSEND );
bBezier = sal_True;
// a:cubicBezTo can only contain 3 a:pt elements, so we need to make sure of this
if( j+2 < rPoly.GetSize() && rPoly.GetFlags(j+1) == POLY_CONTROL && rPoly.GetFlags(j+2) != POLY_CONTROL )
{
mpFS->startElementNS( XML_a, XML_cubicBezTo, FSEND );
for( sal_uInt8 k = 0; k <= 2; ++k )
{
mpFS->singleElementNS( XML_a, XML_pt,
XML_x, I64S( rPoly[j+k].X() - aRect.Left() ),
XML_y, I64S( rPoly[j+k].Y() - aRect.Top() ),
FSEND );
}
mpFS->endElementNS( XML_a, XML_cubicBezTo );
j += 2;
}
}
else if( flags == POLY_NORMAL && !bBezier )
else if( flags == POLY_NORMAL )
{
mpFS->startElementNS( XML_a, XML_lnTo, FSEND );
++nCounter ;
}
mpFS->singleElementNS( XML_a, XML_pt,
XML_x, I64S( rPoly[j].X() - aRect.Left() ),
XML_y, I64S( rPoly[j].Y() - aRect.Top() ),
FSEND );
if( ( flags == POLY_NORMAL || flags == POLY_SYMMTR || j == rPoly.GetSize() - 1) && bBezier )
{
mpFS->endElementNS( XML_a, XML_cubicBezTo );
bBezier = sal_False;
}
else if( flags == POLY_NORMAL && !bBezier )
mpFS->singleElementNS( XML_a, XML_pt,
XML_x, I64S( rPoly[j].X() - aRect.Left() ),
XML_y, I64S( rPoly[j].Y() - aRect.Top() ),
FSEND );
mpFS->endElementNS( XML_a, XML_lnTo );
/* ( j % 3 == 0 ) will fail to address the iterations
that have been dedicated to XML_lnTo in case if the
flag is POLY_NORMAL.
Similarly the sequence would go wrong if we do not
make the flag bBezier as false after ending the element.
*/
else if( bBezier && ( ( j - nCounter ) % 3 ) == 0 )
{
// //a:cubicBezTo can only contain 3 //a:pt elements, so we
// need to break things up...
mpFS->endElementNS( XML_a, XML_cubicBezTo );
bBezier = sal_False;
}
}