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[CBDT] Fix more offsetting 

Fixes https://oss-fuzz.com/v2/testcase-detail/5750379279548416
This commit is contained in:
Behdad Esfahbod 2018-10-15 19:46:45 -07:00
parent 0f85edb778
commit 4c27da7638
1 changed files with 4 additions and 3 deletions
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7
src/hb-ot-color-cbdt-table.hh
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@ -209,9 +209,10 @@ struct IndexSubtableRecord
offsetToSubtable.sanitize (c, base, lastGlyphIndex - firstGlyphIndex + 1));
}
inline bool get_extents (hb_glyph_extents_t *extents) const
inline bool get_extents (hb_glyph_extents_t *extents,
const void *base) const
{
return (this+offsetToSubtable).get_extents (extents);
return (base+offsetToSubtable).get_extents (extents);
}
bool get_image_data (unsigned int gid,
@ -420,7 +421,7 @@ struct CBDT
if (!subtable_record || !x_ppem || !y_ppem)
return false;
if (subtable_record->get_extents (extents))
if (subtable_record->get_extents (extents, base))
return true;
unsigned int image_offset = 0, image_length = 0, image_format = 0;