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[PairPosFormat1] Use a coverage cache as well

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Speeds up Arial shaping by 3%.
This commit is contained in:
Behdad Esfahbod 2025-02-05 19:30:01 +00:00
parent f22943a2a2
commit 5be62a9f66
1 changed files with 41 additions and 2 deletions
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43
src/OT/Layout/GPOS/PairPosFormat1.hh
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@ -103,11 +103,50 @@ struct PairPosFormat1_3
const Coverage &get_coverage () const { return this+coverage; }
bool apply (hb_ot_apply_context_t *c) const
unsigned cache_cost () const
{
return (this+coverage).cost ();
}
static void * cache_func (void *p, hb_ot_lookup_cache_op_t op)
{
switch (op)
{
case hb_ot_lookup_cache_op_t::CREATE:
{
hb_ot_lookup_cache_t *cache = (hb_ot_lookup_cache_t *) hb_malloc (sizeof (hb_ot_lookup_cache_t));
if (likely (cache))
cache->clear ();
return cache;
}
case hb_ot_lookup_cache_op_t::ENTER:
return (void *) true;
case hb_ot_lookup_cache_op_t::LEAVE:
return nullptr;
case hb_ot_lookup_cache_op_t::DESTROY:
{
hb_ot_lookup_cache_t *cache = (hb_ot_lookup_cache_t *) p;
hb_free (cache);
return nullptr;
}
}
}
bool apply_cached (hb_ot_apply_context_t *c) const { return _apply (c, true); }
bool apply (hb_ot_apply_context_t *c) const { return _apply (c, false); }
bool _apply (hb_ot_apply_context_t *c, bool cached) const
{
TRACE_APPLY (this);
#ifndef HB_NO_OT_LAYOUT_LOOKUP_CACHE
hb_ot_lookup_cache_t *cache = cached ? (hb_ot_lookup_cache_t *) c->lookup_accel->cache : nullptr;
#endif
hb_buffer_t *buffer = c->buffer;
#ifndef HB_NO_OT_LAYOUT_LOOKUP_CACHE
unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint, cache);
#else
unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint);
#endif
if (likely (index == NOT_COVERED)) return_trace (false);
hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
@ -156,7 +195,7 @@ struct PairPosFormat1_3
strip = true;
newFormats = compute_effective_value_formats (glyphset, strip, true);
}
out->valueFormat[0] = newFormats.first;
out->valueFormat[1] = newFormats.second;