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-rw-r--r--thirdparty/harfbuzz/src/hb-subset-plan.cc114
1 files changed, 80 insertions, 34 deletions
diff --git a/thirdparty/harfbuzz/src/hb-subset-plan.cc b/thirdparty/harfbuzz/src/hb-subset-plan.cc
index 74b7e3977c..a62ae8e024 100644
--- a/thirdparty/harfbuzz/src/hb-subset-plan.cc
+++ b/thirdparty/harfbuzz/src/hb-subset-plan.cc
@@ -279,12 +279,7 @@ static inline void
_remove_invalid_gids (hb_set_t *glyphs,
unsigned int num_glyphs)
{
- hb_codepoint_t gid = HB_SET_VALUE_INVALID;
- while (glyphs->next (&gid))
- {
- if (gid >= num_glyphs)
- glyphs->del (gid);
- }
+ glyphs->del_range (num_glyphs, HB_SET_VALUE_INVALID);
}
static void
@@ -294,12 +289,13 @@ _populate_unicodes_to_retain (const hb_set_t *unicodes,
{
OT::cmap::accelerator_t cmap (plan->source);
- constexpr static const int size_threshold = 4096;
-
+ unsigned size_threshold = plan->source->get_num_glyphs ();
if (glyphs->is_empty () && unicodes->get_population () < size_threshold)
{
- /* This is the fast path if it's anticipated that size of unicodes
- * is << than the number of codepoints in the font. */
+ // This is approach to collection is faster, but can only be used if glyphs
+ // are not being explicitly added to the subset and the input unicodes set is
+ // not excessively large (eg. an inverted set).
+ plan->unicode_to_new_gid_list.alloc (unicodes->get_population ());
for (hb_codepoint_t cp : *unicodes)
{
hb_codepoint_t gid;
@@ -310,27 +306,32 @@ _populate_unicodes_to_retain (const hb_set_t *unicodes,
}
plan->codepoint_to_glyph->set (cp, gid);
+ plan->unicode_to_new_gid_list.push (hb_pair (cp, gid));
}
}
else
{
+ // This approach is slower, but can handle adding in glyphs to the subset and will match
+ // them with cmap entries.
hb_map_t unicode_glyphid_map;
- cmap.collect_mapping (hb_set_get_empty (), &unicode_glyphid_map);
+ hb_set_t cmap_unicodes;
+ cmap.collect_mapping (&cmap_unicodes, &unicode_glyphid_map);
+ plan->unicode_to_new_gid_list.alloc (hb_min(unicodes->get_population ()
+ + glyphs->get_population (),
+ cmap_unicodes.get_population ()));
- for (hb_pair_t<hb_codepoint_t, hb_codepoint_t> cp_gid :
- + unicode_glyphid_map.iter ())
+ for (hb_codepoint_t cp : cmap_unicodes)
{
- if (!unicodes->has (cp_gid.first) && !glyphs->has (cp_gid.second))
- continue;
+ hb_codepoint_t gid = unicode_glyphid_map[cp];
+ if (!unicodes->has (cp) && !glyphs->has (gid))
+ continue;
- plan->codepoint_to_glyph->set (cp_gid.first, cp_gid.second);
+ plan->codepoint_to_glyph->set (cp, gid);
+ plan->unicode_to_new_gid_list.push (hb_pair (cp, gid));
}
/* 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 ())
+ for (hb_codepoint_t gid : *glyphs)
{
if (gid >= plan->source->get_num_glyphs ())
break;
@@ -338,8 +339,12 @@ _populate_unicodes_to_retain (const hb_set_t *unicodes,
}
}
- + plan->codepoint_to_glyph->keys () | hb_sink (plan->unicodes);
- + plan->codepoint_to_glyph->values () | hb_sink (plan->_glyphset_gsub);
+ auto &arr = plan->unicode_to_new_gid_list;
+ if (arr.length)
+ {
+ plan->unicodes->add_sorted_array (&arr.arrayZ->first, arr.length, sizeof (*arr.arrayZ));
+ plan->_glyphset_gsub->add_array (&arr.arrayZ->second, arr.length, sizeof (*arr.arrayZ));
+ }
}
static void
@@ -388,16 +393,19 @@ _populate_gids_to_retain (hb_subset_plan_t* plan,
_remove_invalid_gids (&cur_glyphset, plan->source->get_num_glyphs ());
hb_set_set (plan->_glyphset_colred, &cur_glyphset);
- // Populate a full set of glyphs to retain by adding all referenced
- // composite glyphs.
- for (hb_codepoint_t gid : cur_glyphset.iter ())
- {
- glyf.add_gid_and_children (gid, plan->_glyphset);
+
+ /* Populate a full set of glyphs to retain by adding all referenced
+ * composite glyphs. */
+ if (glyf.has_data ())
+ for (hb_codepoint_t gid : cur_glyphset)
+ glyf.add_gid_and_children (gid, plan->_glyphset);
+ else
+ plan->_glyphset->union_ (cur_glyphset);
#ifndef HB_NO_SUBSET_CFF
- if (cff.is_valid ())
+ if (cff.is_valid ())
+ for (hb_codepoint_t gid : cur_glyphset)
_add_cff_seac_components (cff, gid, plan->_glyphset);
#endif
- }
_remove_invalid_gids (plan->_glyphset, plan->source->get_num_glyphs ());
@@ -413,6 +421,20 @@ _populate_gids_to_retain (hb_subset_plan_t* plan,
}
static void
+_create_glyph_map_gsub (const hb_set_t* glyph_set_gsub,
+ const hb_map_t* glyph_map,
+ hb_map_t* out)
+{
+ + hb_iter (glyph_set_gsub)
+ | hb_map ([&] (hb_codepoint_t gid) {
+ return hb_pair_t<hb_codepoint_t, hb_codepoint_t> (gid,
+ glyph_map->get (gid));
+ })
+ | hb_sink (out)
+ ;
+}
+
+static void
_create_old_gid_to_new_gid_map (const hb_face_t *face,
bool retain_gids,
const hb_set_t *all_gids_to_retain,
@@ -420,13 +442,19 @@ _create_old_gid_to_new_gid_map (const hb_face_t *face,
hb_map_t *reverse_glyph_map, /* OUT */
unsigned int *num_glyphs /* OUT */)
{
+ unsigned pop = all_gids_to_retain->get_population ();
+ reverse_glyph_map->resize (pop);
+ glyph_map->resize (pop);
+
if (!retain_gids)
{
+ hb_enumerate (hb_iter (all_gids_to_retain), (hb_codepoint_t) 0)
| hb_sink (reverse_glyph_map)
;
*num_glyphs = reverse_glyph_map->get_population ();
- } else {
+ }
+ else
+ {
+ hb_iter (all_gids_to_retain)
| hb_map ([] (hb_codepoint_t _) {
return hb_pair_t<hb_codepoint_t, hb_codepoint_t> (_, _);
@@ -434,10 +462,9 @@ _create_old_gid_to_new_gid_map (const hb_face_t *face,
| hb_sink (reverse_glyph_map)
;
- unsigned max_glyph =
- + hb_iter (all_gids_to_retain)
- | hb_reduce (hb_max, 0u)
- ;
+ hb_codepoint_t max_glyph = HB_SET_VALUE_INVALID;
+ hb_set_previous (all_gids_to_retain, &max_glyph);
+
*num_glyphs = max_glyph + 1;
}
@@ -485,6 +512,9 @@ hb_subset_plan_create_or_fail (hb_face_t *face,
plan->successful = true;
plan->flags = input->flags;
plan->unicodes = hb_set_create ();
+
+ plan->unicode_to_new_gid_list.init ();
+
plan->name_ids = hb_set_copy (input->sets.name_ids);
_nameid_closure (face, plan->name_ids);
plan->name_languages = hb_set_copy (input->sets.name_languages);
@@ -502,6 +532,7 @@ hb_subset_plan_create_or_fail (hb_face_t *face,
plan->codepoint_to_glyph = hb_map_create ();
plan->glyph_map = hb_map_create ();
plan->reverse_glyph_map = hb_map_create ();
+ plan->glyph_map_gsub = hb_map_create ();
plan->gsub_lookups = hb_map_create ();
plan->gpos_lookups = hb_map_create ();
@@ -536,6 +567,19 @@ hb_subset_plan_create_or_fail (hb_face_t *face,
plan->reverse_glyph_map,
&plan->_num_output_glyphs);
+ _create_glyph_map_gsub (
+ plan->_glyphset_gsub,
+ plan->glyph_map,
+ plan->glyph_map_gsub);
+
+ // Now that we have old to new gid map update the unicode to new gid list.
+ for (unsigned i = 0; i < plan->unicode_to_new_gid_list.length; i++)
+ {
+ // Use raw array access for performance.
+ plan->unicode_to_new_gid_list.arrayZ[i].second =
+ plan->glyph_map->get(plan->unicode_to_new_gid_list.arrayZ[i].second);
+ }
+
if (unlikely (plan->in_error ())) {
hb_subset_plan_destroy (plan);
return nullptr;
@@ -558,6 +602,7 @@ hb_subset_plan_destroy (hb_subset_plan_t *plan)
if (!hb_object_destroy (plan)) return;
hb_set_destroy (plan->unicodes);
+ plan->unicode_to_new_gid_list.fini ();
hb_set_destroy (plan->name_ids);
hb_set_destroy (plan->name_languages);
hb_set_destroy (plan->layout_features);
@@ -569,6 +614,7 @@ hb_subset_plan_destroy (hb_subset_plan_t *plan)
hb_map_destroy (plan->codepoint_to_glyph);
hb_map_destroy (plan->glyph_map);
hb_map_destroy (plan->reverse_glyph_map);
+ hb_map_destroy (plan->glyph_map_gsub);
hb_set_destroy (plan->_glyphset);
hb_set_destroy (plan->_glyphset_gsub);
hb_set_destroy (plan->_glyphset_mathed);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 10:32:11 +0000