unsigned int offset = l + r;
const FWORD *v = &StructAtOffset<FWORD> (&(this+array), offset);
if (unlikely ((const char *) v < (const char *) &array ||
- (const char *) v + 2 - (const char *) this <= header.length))
+ (const char *) v + v->static_size - (const char *) this <= header.length))
return 0;
return *v;
}
inline bool is_long (void) const { return flags & ValuesAreLong; }
+ inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right,
+ unsigned int num_glyphs) const
+ {
+ if (is_long ())
+ {
+ const U::Long &t = u.l;
+ unsigned int l = (this+t.rowIndexTable).get_value_or_null (left, num_glyphs);
+ unsigned int r = (this+t.columnIndexTable).get_value_or_null (right, num_glyphs);
+ unsigned int offset = l + r;
+ const FWORD32 *v = &StructAtOffset<FWORD32> (&(this+t.array), offset * sizeof (FWORD32));
+ if (unlikely ((const char *) v < (const char *) &t.array ||
+ (const char *) v + v->static_size - (const char *) this <= header.length))
+ return 0;
+ return *v;
+ }
+ else
+ {
+ const U::Short &t = u.s;
+ unsigned int l = (this+t.rowIndexTable).get_value_or_null (left, num_glyphs);
+ unsigned int r = (this+t.columnIndexTable).get_value_or_null (right, num_glyphs);
+ unsigned int offset = l + r;
+ const FWORD *v = &StructAtOffset<FWORD> (&(this+t.array), offset * sizeof (FWORD));
+ if (unlikely ((const char *) v < (const char *) &t.array ||
+ (const char *) v + v->static_size - (const char *) this <= header.length))
+ return 0;
+ return *v;
+ }
+ }
+
inline bool apply (hb_aat_apply_context_t *c) const
{
TRACE_APPLY (this);
if (!c->plan->requested_kerning)
return false;
- /* TODO */
+ accelerator_t accel (*this,
+ c->face->get_num_glyphs ());
+ hb_kern_machine_t<accelerator_t> machine (accel);
+ machine.kern (c->font, c->buffer, c->plan->kern_mask);
return_trace (true);
}
(
u.l.rowIndexTable.sanitize (c, this) &&
u.l.columnIndexTable.sanitize (c, this) &&
- u.l.kerningArray.sanitize (c, this)
+ u.l.array.sanitize (c, this)
) : (
u.s.rowIndexTable.sanitize (c, this) &&
u.s.columnIndexTable.sanitize (c, this) &&
- u.s.kerningArray.sanitize (c, this)
+ u.s.array.sanitize (c, this)
)));
}
+ struct accelerator_t
+ {
+ const KerxSubTableFormat6 &table;
+ unsigned int num_glyphs;
+
+ inline accelerator_t (const KerxSubTableFormat6 &table_,
+ unsigned int num_glyphs_)
+ : table (table_), num_glyphs (num_glyphs_) {}
+
+ inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
+ {
+ return table.get_kerning (left, right, num_glyphs);
+ }
+ };
+
protected:
KerxSubTableHeader header;
HBUINT32 flags;
HBUINT16 rowCount;
HBUINT16 columnCount;
- union
+ union U
{
- struct
- {
- LOffsetTo<Lookup<HBUINT16> > rowIndexTable;
- LOffsetTo<Lookup<HBUINT16> > columnIndexTable;
- LOffsetTo<FWORD> kerningArray;
- } s;
- struct
+ struct Long
{
LOffsetTo<Lookup<HBUINT32> > rowIndexTable;
LOffsetTo<Lookup<HBUINT32> > columnIndexTable;
- LOffsetTo<FWORD32> kerningArray;
+ LOffsetTo<FWORD32> array;
} l;
+ struct Short
+ {
+ LOffsetTo<Lookup<HBUINT16> > rowIndexTable;
+ LOffsetTo<Lookup<HBUINT16> > columnIndexTable;
+ LOffsetTo<FWORD> array;
+ } s;
} u;
public:
DEFINE_SIZE_STATIC (32);