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[subset/cff] Micro-optimize CFFIndex writing

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This commit is contained in:
Behdad Esfahbod 2023-06-07 12:05:57 -06:00
parent 70b13ef00b
commit 5fe96213aa
1 changed files with 13 additions and 12 deletions
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25
src/hb-ot-cff-common.hh
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@ -69,7 +69,9 @@ struct CFFIndex
{
TRACE_SERIALIZE (this);
auto it = hb_iter (iterable);
serialize_header(c, + it | hb_map (hb_iter) | hb_map (hb_len));
unsigned size = serialize_header(c, + it | hb_map (hb_iter) | hb_map (hb_len));
unsigned char *ret = c->allocate_size<unsigned char> (size, false);
if (unlikely (!ret)) return_trace (false);
for (const auto &_ : +it)
{
auto it = hb_iter (_);
@ -78,20 +80,19 @@ struct CFFIndex
{
if (!len)
continue;
unsigned char *ret = c->allocate_size<unsigned char> (1, false);
if (unlikely (!ret)) return_trace (false);
*ret = *it.arrayZ;
*ret++ = *it.arrayZ;
continue;
}
it.copy (c);
hb_memcpy (ret, it.arrayZ, len);
ret += len;
}
return_trace (true);
}
template <typename Iterator,
hb_requires (hb_is_iterator (Iterator))>
bool serialize_header (hb_serialize_context_t *c,
Iterator it)
unsigned serialize_header (hb_serialize_context_t *c,
Iterator it)
{
TRACE_SERIALIZE (this);
@ -99,13 +100,13 @@ struct CFFIndex
unsigned off_size = (hb_bit_storage (total + 1) + 7) / 8;
/* serialize CFFIndex header */
if (unlikely (!c->extend_min (this))) return_trace (false);
if (unlikely (!c->extend_min (this))) return_trace (0);
this->count = hb_len (it);
if (!this->count) return_trace (true);
if (unlikely (!c->extend (this->offSize))) return_trace (false);
if (!this->count) return_trace (0);
if (unlikely (!c->extend (this->offSize))) return_trace (0);
this->offSize = off_size;
if (unlikely (!c->allocate_size<HBUINT8> (off_size * (this->count + 1), false)))
return_trace (false);
return_trace (0);
/* serialize indices */
unsigned int offset = 1;
@ -117,7 +118,7 @@ struct CFFIndex
}
set_offset_at (i, offset);
return_trace (true);
return_trace (total);
}
template <typename Iterable,