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[subset] Optimize _is_table_present 

One call for most of the fonts and no malloc
This commit is contained in:
Ebrahim Byagowi 2020-02-05 00:28:21 +03:30
parent 25707e37e3
commit b1f63109c6
1 changed files with 9 additions and 9 deletions
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18
src/hb-subset.cc
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@ -134,16 +134,16 @@ _subset (hb_subset_plan_t *plan)
}
static bool
_is_table_present (hb_face_t *source,
hb_tag_t tag)
_is_table_present (hb_face_t *source, hb_tag_t tag)
{
unsigned tables = hb_face_get_table_tags (source, 0, nullptr, nullptr);
hb_vector_t<uint32_t> tags;
tags.resize (tables);
hb_face_get_table_tags (source, 0, &tables, tags.arrayZ);
for (unsigned int i = 0; i < tables; i++) {
if (tags[i] == tag)
return true;
hb_tag_t tables[32];
unsigned offset = 0, num_tables = ARRAY_LENGTH (tables);
while ((hb_face_get_table_tags (source, offset, &num_tables, tables), num_tables))
{
for (unsigned i = 0; i < num_tables; ++i)
if (tables[i] == tag)
return true;
offset += num_tables;
}
return false;
}