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reject nested seac

This commit is contained in:
Michiharu Ariza 2018-11-15 12:10:23 -08:00
parent c37aecd41c
commit 13735570f0
2 changed files with 10 additions and 5 deletions
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4
src/hb-cff1-interp-cs.hh
View File

@ -44,6 +44,7 @@ struct CFF1CSInterpEnv : CSInterpEnv<Number, CFF1Subrs>
processed_width = false;
has_width = false;
arg_start = 0;
in_seac = false;
}
inline void fini (void)
@ -71,10 +72,13 @@ struct CFF1CSInterpEnv : CSInterpEnv<Number, CFF1Subrs>
SUPER::clear_args ();
}
inline void set_in_seac (bool _in_seac) { in_seac = _in_seac; }
bool processed_width;
bool has_width;
unsigned int arg_start;
Number width;
bool in_seac;
private:
typedef CSInterpEnv<Number, CFF1Subrs> SUPER;

11
src/hb-ot-cff1-table.cc
View File

@ -261,7 +261,7 @@ struct CFF1PathProcs_Extents : PathProcs<CFF1PathProcs_Extents, CFF1CSInterpEnv,
}
};
static bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, Bounds &bounds);
static bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, Bounds &bounds, bool in_seac=false);
struct CFF1CSOpSet_Extents : CFF1CSOpSet<CFF1CSOpSet_Extents, ExtentsParam, CFF1PathProcs_Extents>
{
@ -275,9 +275,9 @@ struct CFF1CSOpSet_Extents : CFF1CSOpSet<CFF1CSOpSet_Extents, ExtentsParam, CFF1
hb_codepoint_t accent = param.cff->std_code_to_glyph (env.argStack[n-1].to_int ());
Bounds base_bounds, accent_bounds;
if (likely (base && accent
&& _get_bounds (param.cff, base, base_bounds)
&& _get_bounds (param.cff, accent, accent_bounds)))
if (likely (!env.in_seac && base && accent
&& _get_bounds (param.cff, base, base_bounds, true)
&& _get_bounds (param.cff, accent, accent_bounds, true)))
{
param.bounds.merge (base_bounds);
accent_bounds.offset (delta);
@ -288,7 +288,7 @@ struct CFF1CSOpSet_Extents : CFF1CSOpSet<CFF1CSOpSet_Extents, ExtentsParam, CFF1
}
};
bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, Bounds &bounds)
bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, Bounds &bounds, bool in_seac)
{
bounds.init ();
if (unlikely (!cff->is_valid () || (glyph >= cff->num_glyphs))) return false;
@ -297,6 +297,7 @@ bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, Boun
CFF1CSInterpreter<CFF1CSOpSet_Extents, ExtentsParam> interp;
const ByteStr str = (*cff->charStrings)[glyph];
interp.env.init (str, *cff, fd);
interp.env.set_in_seac (in_seac);
ExtentsParam param;
param.init (cff);
if (unlikely (!interp.interpret (param))) return false;