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[subset] Move plan unicodes and gids population to end of _populate_unicodes...

This commit is contained in:
Garret Rieger 2021-08-25 14:42:00 -07:00
parent fa4bf7cf58
commit cd07070e41
1 changed files with 28 additions and 27 deletions
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55
src/hb-subset-plan.cc
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@ -240,12 +240,12 @@ _populate_unicodes_to_retain (const hb_set_t *unicodes,
{
OT::cmap::accelerator_t cmap;
cmap.init (plan->source);
constexpr static const int size_threshold = 65000;
constexpr static const int size_threshold = 4000;
if (unicodes->get_population () < size_threshold && glyphs->is_empty ())
{
// This is the fast path if it's anticipated that size of unicodes
// is << then the number of codepoints in the font.
// is << than the number of codepoints in the font.
for (hb_codepoint_t cp : *unicodes)
{
hb_codepoint_t gid;
@ -254,36 +254,37 @@ _populate_unicodes_to_retain (const hb_set_t *unicodes,
DEBUG_MSG(SUBSET, nullptr, "Drop U+%04X; no gid", cp);
continue;
}
plan->unicodes->add (cp);
plan->codepoint_to_glyph->set (cp, gid);
plan->_glyphset_gsub->add (gid);
}
cmap.fini ();
return;
} else {
hb_map_t unicode_glyphid_map;
cmap.collect_mapping (hb_set_get_empty (), &unicode_glyphid_map);
cmap.fini ();
for (hb_pair_t<hb_codepoint_t, hb_codepoint_t> cp_gid :
+ unicode_glyphid_map.iter ())
{
if (!unicodes->has (cp_gid.first) && !glyphs->has (cp_gid.second))
continue;
plan->codepoint_to_glyph->set (cp_gid.first, cp_gid.second);
}
// Add gids which where requested, but not mapped in cmap
// TODO(garretrieger): once https://github.com/harfbuzz/harfbuzz/issues/3169
// is implemented, this can be done with union and del_range
for (hb_codepoint_t gid : glyphs->iter ())
{
if (gid >= plan->source->get_num_glyphs ())
break;
plan->_glyphset_gsub->add (gid);
}
}
hb_map_t unicode_glyphid_map;
cmap.collect_mapping (hb_set_get_empty (), &unicode_glyphid_map);
cmap.fini ();
for (hb_pair_t<hb_codepoint_t, hb_codepoint_t> cp_gid :
+ unicode_glyphid_map.iter ())
{
if (!unicodes->has (cp_gid.first) && !glyphs->has (cp_gid.second))
continue;
plan->unicodes->add (cp_gid.first);
plan->codepoint_to_glyph->set (cp_gid.first, cp_gid.second);
plan->_glyphset_gsub->add (cp_gid.second);
}
// Add gids which where requested, but not mapped in cmap
for (hb_codepoint_t gid : glyphs->iter ())
{
if (gid >= plan->source->get_num_glyphs ())
break;
plan->_glyphset_gsub->add (gid);
}
+ plan->codepoint_to_glyph->keys () | hb_sink (plan->unicodes);
+ plan->codepoint_to_glyph->values () | hb_sink (plan->_glyphset_gsub);
}
static void