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Harfbuzz GPOS hinting- do not consider a subtable to be invalid if it is just empty 

Considering a subtable to be invalid when it was empty meant that it
returned an error causing all further hinting to be aborted.  This means
that we get no hinting in certain cases with certain fonts.

Change-Id: I840c016dc85935b4f2c4373c66a79b4bd8b3a30d
Reviewed-by: Adrian Yanes <ext-adrian.yanes@nokia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>
bb10
John Tapsell 2012-03-08 23:10:30 +00:00 committed by Qt by Nokia
parent 21c98e52c5
commit 4c0de07a0e
1 changed files with 3 additions and 0 deletions
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3
src/3rdparty/harfbuzz/src/harfbuzz-gpos.c vendored
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@ -1595,6 +1595,9 @@ static HB_Error Lookup_PairPos1( GPOS_Instance* gpi,
if ( index >= ppf1->PairSetCount )
return ERR(HB_Err_Invalid_SubTable);
if (!ppf1->PairSet[index].PairValueCount)
return HB_Err_Not_Covered;
pvr = ppf1->PairSet[index].PairValueRecord;
if ( !pvr )
return ERR(HB_Err_Invalid_SubTable);