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[kern] Respect more flags

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This commit is contained in:
Behdad Esfahbod 2018-11-02 14:26:04 -04:00
parent 9f880bad0d
commit 74c7a2c6c8
1 changed files with 15 additions and 6 deletions
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21
src/hb-ot-kern-table.hh
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@ -395,8 +395,11 @@ struct KernSubTableWrapper
/* https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern */
inline const T* thiz (void) const { return static_cast<const T *> (this); }
inline bool is_supported (void) const
{ return !(thiz()->coverage & T::CheckFlags); }
inline bool is_horizontal (void) const
{ return (thiz()->coverage & T::CheckFlags) == T::CheckHorizontal; }
{ return (thiz()->coverage & T::Direction) == T::CheckHorizontal; }
inline bool is_override (void) const
{ return bool (thiz()->coverage & T::Override); }
@ -405,7 +408,7 @@ struct KernSubTableWrapper
{ return thiz()->subtable.get_kerning (left, right, thiz()->format); }
inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right) const
{ return is_horizontal () ? get_kerning (left, right) : 0; }
{ return is_supported () && is_horizontal () ? get_kerning (left, right) : 0; }
inline void apply (AAT::hb_aat_apply_context_t *c) const
{ thiz()->subtable.apply (c, thiz()->format); }
@ -435,7 +438,7 @@ struct KernTable
unsigned int count = thiz()->nTables;
for (unsigned int i = 0; i < count; i++)
{
if (st->is_override ())
if (st->is_supported () && st->is_override ())
v = 0;
v += st->get_h_kerning (left, right);
st = &StructAfter<typename T::SubTableWrapper> (*st);
@ -452,13 +455,19 @@ struct KernTable
unsigned int last_override = 0;
for (unsigned int i = 0; i < count; i++)
{
if (st->is_override ())
if (st->is_supported () && st->is_override ())
last_override = i;
st = &StructAfter<typename T::SubTableWrapper> (*st);
}
st = CastP<typename T::SubTableWrapper> (&thiz()->dataZ);
for (unsigned int i = 0; i < count; i++)
{
if (!st->is_supported ())
goto skip;
if (HB_DIRECTION_IS_HORIZONTAL (c->buffer->props.direction) != st->is_horizontal ())
goto skip;
if (i < last_override)
goto skip;
@ -514,7 +523,7 @@ struct KernOT : KernTable<KernOT>
Variation = 0x00u, /* Not supported. */
CheckFlags = 0x07u,
CheckFlags = 0x06u,
CheckHorizontal = 0x01u
};
@ -555,7 +564,7 @@ struct KernAAT : KernTable<KernAAT>
Override = 0x00u, /* Not supported. */
CheckFlags = 0xE0u,
CheckFlags = 0x60u,
CheckHorizontal = 0x00u
};