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Resolves: ofz#576 unexpected exception with invalid fraction

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Change-Id: I1d653775e88e9fa2ba7b62fce39d52fc21ffe363
This commit is contained in:
Caolán McNamara
2017-02-09 09:21:39 +00:00
parent e2b1e755e2
commit cff6cdb2ee
1 changed files with 28 additions and 18 deletions
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36
vcl/source/gdi/svmconverter.cxx
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@@ -129,19 +129,26 @@ void ImplWriteColor( SvStream& rOStm, const Color& rColor )
rOStm.WriteInt16( nVal );
}
void ImplReadMapMode( SvStream& rIStm, MapMode& rMapMode )
bool ImplReadMapMode(SvStream& rIStm, MapMode& rMapMode)
{
Point aOrg;
sal_Int32 nXNum;
sal_Int32 nXDenom;
sal_Int32 nYNum;
sal_Int32 nYDenom;
sal_Int16 nUnit;
sal_Int16 nUnit(0);
rIStm.ReadInt16(nUnit);
Point aOrg;
ReadPair(rIStm, aOrg);
sal_Int32 nXNum(0), nXDenom(0), nYNum(0), nYDenom(0);
rIStm.ReadInt32(nXNum).ReadInt32(nXDenom).ReadInt32(nYNum).ReadInt32(nYDenom);
if (!rIStm.good() || nXDenom == 0 || nYDenom == 0)
{
SAL_WARN("vcl.gdi", "Parsing error: invalid mapmode fraction");
return false;
}
rMapMode = MapMode( (MapUnit) nUnit, aOrg, Fraction( nXNum, nXDenom ), Fraction( nYNum, nYDenom ) );
return true;
}
void ImplWriteMapMode( SvStream& rOStm, const MapMode& rMapMode )
@@ -503,7 +510,6 @@ void SVMConverter::ImplConvertFromSVM1( SvStream& rIStm, GDIMetaFile& rMtf )
rtl_TextEncoding eActualCharSet = osl_getThreadTextEncoding();
bool bFatLine = false;
MapMode aMapMode;
tools::Polygon aActionPoly;
Rectangle aRect;
Point aPt, aPt1;
@@ -513,7 +519,11 @@ void SVMConverter::ImplConvertFromSVM1( SvStream& rIStm, GDIMetaFile& rMtf )
sal_uInt32 nUnicodeCommentStreamPos = 0;
sal_Int32 nUnicodeCommentActionNumber = 0;
ImplReadMapMode( rIStm, aMapMode ); // MapMode
rMtf.SetPrefSize(aPrefSz);
MapMode aMapMode;
if (ImplReadMapMode(rIStm, aMapMode)) // MapMode
rMtf.SetPrefMapMode(aMapMode);
sal_Int32 nActions(0);
rIStm.ReadInt32(nActions); // Action count
@@ -531,8 +541,6 @@ void SVMConverter::ImplConvertFromSVM1( SvStream& rIStm, GDIMetaFile& rMtf )
nActions = nMaxPossibleActions;
}
rMtf.SetPrefSize( aPrefSz );
rMtf.SetPrefMapMode( aMapMode );
size_t nLastPolygonAction(0);
for (sal_Int32 i = 0; i < nActions && rIStm.good(); ++i)
@@ -1042,11 +1050,13 @@ void SVMConverter::ImplConvertFromSVM1( SvStream& rIStm, GDIMetaFile& rMtf )
case GDI_MAPMODE_ACTION:
{
ImplReadMapMode( rIStm, aMapMode );
if (ImplReadMapMode(rIStm, aMapMode))
{
rMtf.AddAction(new MetaMapModeAction(aMapMode));
// #106172# Track font relevant data in shadow VDev
aFontVDev->SetMapMode(aMapMode);
};
}
break;