diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-subset-plan.cc')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-subset-plan.cc | 428 |
1 files changed, 314 insertions, 114 deletions
diff --git a/thirdparty/harfbuzz/src/hb-subset-plan.cc b/thirdparty/harfbuzz/src/hb-subset-plan.cc index d055783a4d..53f8664d92 100644 --- a/thirdparty/harfbuzz/src/hb-subset-plan.cc +++ b/thirdparty/harfbuzz/src/hb-subset-plan.cc @@ -35,10 +35,13 @@ #include "hb-ot-layout-gsub-table.hh" #include "hb-ot-cff1-table.hh" #include "hb-ot-color-colr-table.hh" +#include "hb-ot-color-colrv1-closure.hh" #include "hb-ot-var-fvar-table.hh" #include "hb-ot-stat-table.hh" +#include "hb-ot-math-table.hh" +typedef hb_hashmap_t<unsigned, hb_set_t *> script_langsys_map; #ifndef HB_NO_SUBSET_CFF static inline void _add_cff_seac_components (const OT::cff1::accelerator_t &cff, @@ -54,7 +57,23 @@ _add_cff_seac_components (const OT::cff1::accelerator_t &cff, } #endif -#ifndef HB_NO_SUBSET_LAYOUT +static void +_remap_palette_indexes (const hb_set_t *palette_indexes, + hb_map_t *mapping /* OUT */) +{ + unsigned new_idx = 0; + for (unsigned palette_index : palette_indexes->iter ()) + { + if (palette_index == 0xFFFF) + { + mapping->set (palette_index, palette_index); + continue; + } + mapping->set (palette_index, new_idx); + new_idx++; + } +} + static void _remap_indexes (const hb_set_t *indexes, hb_map_t *mapping /* OUT */) @@ -66,73 +85,112 @@ _remap_indexes (const hb_set_t *indexes, } -static inline void -_gsub_closure_glyphs_lookups_features (hb_face_t *face, - hb_set_t *gids_to_retain, - hb_map_t *gsub_lookups, - hb_map_t *gsub_features) +#ifndef HB_NO_SUBSET_LAYOUT +typedef void (*layout_collect_func_t) (hb_face_t *face, hb_tag_t table_tag, const hb_tag_t *scripts, const hb_tag_t *languages, const hb_tag_t *features, hb_set_t *lookup_indexes /* OUT */); + + +template <typename T> +static void _collect_layout_indices (hb_face_t *face, + const T& table, + const hb_set_t *layout_features_to_retain, + layout_collect_func_t layout_collect_func, + hb_set_t *indices /* OUT */) { - hb_set_t lookup_indices; - hb_ot_layout_collect_lookups (face, - HB_OT_TAG_GSUB, - nullptr, - nullptr, - nullptr, - &lookup_indices); - hb_ot_layout_lookups_substitute_closure (face, - &lookup_indices, - gids_to_retain); - hb_blob_ptr_t<OT::GSUB> gsub = hb_sanitize_context_t ().reference_table<OT::GSUB> (face); - gsub->closure_lookups (face, - gids_to_retain, - &lookup_indices); - _remap_indexes (&lookup_indices, gsub_lookups); + hb_vector_t<hb_tag_t> features; + if (!features.alloc (table.get_feature_count () + 1)) + return; - // Collect and prune features - hb_set_t feature_indices; - hb_ot_layout_collect_features (face, - HB_OT_TAG_GSUB, - nullptr, - nullptr, - nullptr, - &feature_indices); - gsub->prune_features (gsub_lookups, &feature_indices); - _remap_indexes (&feature_indices, gsub_features); - - gsub.destroy (); + hb_set_t visited_features; + bool retain_all_features = true; + for (unsigned i = 0; i < table.get_feature_count (); i++) + { + hb_tag_t tag = table.get_feature_tag (i); + if (!tag) continue; + if (!layout_features_to_retain->has (tag)) + { + retain_all_features = false; + continue; + } + + if (visited_features.has (tag)) + continue; + + features.push (tag); + visited_features.add (tag); + } + + if (!features) + return; + + // The collect function needs a null element to signal end of the array. + features.push (0); + + if (retain_all_features) + { + // Looking for all features, trigger the faster collection method. + layout_collect_func (face, + T::tableTag, + nullptr, + nullptr, + nullptr, + indices); + return; + } + + layout_collect_func (face, + T::tableTag, + nullptr, + nullptr, + features.arrayZ, + indices); } +template <typename T> static inline void -_gpos_closure_lookups_features (hb_face_t *face, - const hb_set_t *gids_to_retain, - hb_map_t *gpos_lookups, - hb_map_t *gpos_features) +_closure_glyphs_lookups_features (hb_face_t *face, + hb_set_t *gids_to_retain, + const hb_set_t *layout_features_to_retain, + hb_map_t *lookups, + hb_map_t *features, + script_langsys_map *langsys_map) { + hb_blob_ptr_t<T> table = hb_sanitize_context_t ().reference_table<T> (face); + hb_tag_t table_tag = table->tableTag; hb_set_t lookup_indices; - hb_ot_layout_collect_lookups (face, - HB_OT_TAG_GPOS, - nullptr, - nullptr, - nullptr, - &lookup_indices); - hb_blob_ptr_t<OT::GPOS> gpos = hb_sanitize_context_t ().reference_table<OT::GPOS> (face); - gpos->closure_lookups (face, - gids_to_retain, + _collect_layout_indices<T> (face, + *table, + layout_features_to_retain, + hb_ot_layout_collect_lookups, + &lookup_indices); + + if (table_tag == HB_OT_TAG_GSUB) + hb_ot_layout_lookups_substitute_closure (face, + &lookup_indices, + gids_to_retain); + table->closure_lookups (face, + gids_to_retain, &lookup_indices); - _remap_indexes (&lookup_indices, gpos_lookups); + _remap_indexes (&lookup_indices, lookups); // Collect and prune features hb_set_t feature_indices; - hb_ot_layout_collect_features (face, - HB_OT_TAG_GPOS, - nullptr, - nullptr, - nullptr, - &feature_indices); - gpos->prune_features (gpos_lookups, &feature_indices); - _remap_indexes (&feature_indices, gpos_features); - gpos.destroy (); + _collect_layout_indices<T> (face, + *table, + layout_features_to_retain, + hb_ot_layout_collect_features, + &feature_indices); + + table->prune_features (lookups, &feature_indices); + hb_map_t duplicate_feature_map; + table->find_duplicate_features (lookups, &feature_indices, &duplicate_feature_map); + + feature_indices.clear (); + table->prune_langsys (&duplicate_feature_map, langsys_map, &feature_indices); + _remap_indexes (&feature_indices, features); + + table.destroy (); } + #endif #ifndef HB_NO_VAR @@ -166,9 +224,9 @@ static inline void #endif static inline void -_cmap_closure (hb_face_t *face, - const hb_set_t *unicodes, - hb_set_t *glyphset) +_cmap_closure (hb_face_t *face, + const hb_set_t *unicodes, + hb_set_t *glyphset) { OT::cmap::accelerator_t cmap; cmap.init (face); @@ -176,6 +234,50 @@ _cmap_closure (hb_face_t *face, cmap.fini (); } +static void _colr_closure (hb_face_t *face, + hb_map_t *layers_map, + hb_map_t *palettes_map, + hb_set_t *glyphs_colred) +{ + OT::COLR::accelerator_t colr; + colr.init (face); + if (!colr.is_valid ()) return; + + unsigned iteration_count = 0; + hb_set_t palette_indices, layer_indices; + unsigned glyphs_num; + { + glyphs_num = glyphs_colred->get_population (); + + // Collect all glyphs referenced by COLRv0 + hb_set_t glyphset_colrv0; + for (hb_codepoint_t gid : glyphs_colred->iter ()) + colr.closure_glyphs (gid, &glyphset_colrv0); + + glyphs_colred->union_ (glyphset_colrv0); + + //closure for COLRv1 + colr.closure_forV1 (glyphs_colred, &layer_indices, &palette_indices); + } while (iteration_count++ <= HB_CLOSURE_MAX_STAGES && + glyphs_num != glyphs_colred->get_population ()); + + colr.closure_V0palette_indices (glyphs_colred, &palette_indices); + _remap_indexes (&layer_indices, layers_map); + _remap_palette_indexes (&palette_indices, palettes_map); + colr.fini (); +} + +static inline void +_math_closure (hb_face_t *face, + hb_set_t *glyphset) +{ + hb_blob_ptr_t<OT::MATH> math = hb_sanitize_context_t ().reference_table<OT::MATH> (face); + if (math->has_data ()) + math->closure_glyphs (glyphset); + math.destroy (); +} + + static inline void _remove_invalid_gids (hb_set_t *glyphs, unsigned int num_glyphs) @@ -189,94 +291,148 @@ _remove_invalid_gids (hb_set_t *glyphs, } static void +_populate_unicodes_to_retain (const hb_set_t *unicodes, + const hb_set_t *glyphs, + hb_subset_plan_t *plan) +{ + OT::cmap::accelerator_t cmap; + cmap.init (plan->source); + + constexpr static const int size_threshold = 4096; + + 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. */ + for (hb_codepoint_t cp : *unicodes) + { + hb_codepoint_t gid; + if (!cmap.get_nominal_glyph (cp, &gid)) + { + DEBUG_MSG(SUBSET, nullptr, "Drop U+%04X; no gid", cp); + continue; + } + + plan->codepoint_to_glyph->set (cp, gid); + } + } + else + { + hb_map_t unicode_glyphid_map; + cmap.collect_mapping (hb_set_get_empty (), &unicode_glyphid_map); + + 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); + } + } + + + plan->codepoint_to_glyph->keys () | hb_sink (plan->unicodes); + + plan->codepoint_to_glyph->values () | hb_sink (plan->_glyphset_gsub); + + cmap.fini (); +} + +static void _populate_gids_to_retain (hb_subset_plan_t* plan, - const hb_set_t *unicodes, - const hb_set_t *input_glyphs_to_retain, bool close_over_gsub, bool close_over_gpos, bool close_over_gdef) { - OT::cmap::accelerator_t cmap; OT::glyf::accelerator_t glyf; #ifndef HB_NO_SUBSET_CFF OT::cff1::accelerator_t cff; #endif - OT::COLR::accelerator_t colr; - cmap.init (plan->source); glyf.init (plan->source); #ifndef HB_NO_SUBSET_CFF cff.init (plan->source); #endif - colr.init (plan->source); plan->_glyphset_gsub->add (0); // Not-def - hb_set_union (plan->_glyphset_gsub, input_glyphs_to_retain); - - hb_codepoint_t cp = HB_SET_VALUE_INVALID; - while (unicodes->next (&cp)) - { - hb_codepoint_t gid; - if (!cmap.get_nominal_glyph (cp, &gid)) - { - 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_closure (plan->source, plan->unicodes, plan->_glyphset_gsub); #ifndef HB_NO_SUBSET_LAYOUT if (close_over_gsub) // closure all glyphs/lookups/features needed for GSUB substitutions. - _gsub_closure_glyphs_lookups_features (plan->source, plan->_glyphset_gsub, plan->gsub_lookups, plan->gsub_features); + _closure_glyphs_lookups_features<OT::GSUB> ( + plan->source, + plan->_glyphset_gsub, + plan->layout_features, + plan->gsub_lookups, + plan->gsub_features, + plan->gsub_langsys); if (close_over_gpos) - _gpos_closure_lookups_features (plan->source, plan->_glyphset_gsub, plan->gpos_lookups, plan->gpos_features); + _closure_glyphs_lookups_features<OT::GPOS> ( + plan->source, + plan->_glyphset_gsub, + plan->layout_features, + plan->gpos_lookups, + plan->gpos_features, + plan->gpos_langsys); #endif _remove_invalid_gids (plan->_glyphset_gsub, plan->source->get_num_glyphs ()); + hb_set_set (plan->_glyphset_mathed, plan->_glyphset_gsub); + _math_closure (plan->source, plan->_glyphset_mathed); + _remove_invalid_gids (plan->_glyphset_mathed, plan->source->get_num_glyphs ()); + + hb_set_t cur_glyphset = *plan->_glyphset_mathed; + _colr_closure (plan->source, plan->colrv1_layers, plan->colr_palettes, &cur_glyphset); + _remove_invalid_gids (&cur_glyphset, plan->source->get_num_glyphs ()); + // Populate a full set of glyphs to retain by adding all referenced // composite glyphs. - hb_codepoint_t gid = HB_SET_VALUE_INVALID; - while (plan->_glyphset_gsub->next (&gid)) + for (hb_codepoint_t gid : cur_glyphset.iter ()) { glyf.add_gid_and_children (gid, plan->_glyphset); #ifndef HB_NO_SUBSET_CFF if (cff.is_valid ()) _add_cff_seac_components (cff, gid, plan->_glyphset); #endif - if (colr.is_valid ()) - colr.closure_glyphs (gid, plan->_glyphset); } _remove_invalid_gids (plan->_glyphset, plan->source->get_num_glyphs ()); + #ifndef HB_NO_VAR if (close_over_gdef) _collect_layout_variation_indices (plan->source, - plan->_glyphset_gsub, - plan->gpos_lookups, - plan->layout_variation_indices, - plan->layout_variation_idx_map); + plan->_glyphset_gsub, + plan->gpos_lookups, + plan->layout_variation_indices, + plan->layout_variation_idx_map); #endif #ifndef HB_NO_SUBSET_CFF cff.fini (); #endif glyf.fini (); - cmap.fini (); } 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, - hb_map_t *glyph_map, /* OUT */ - hb_map_t *reverse_glyph_map, /* OUT */ - unsigned int *num_glyphs /* OUT */) + bool retain_gids, + const hb_set_t *all_gids_to_retain, + hb_map_t *glyph_map, /* OUT */ + hb_map_t *reverse_glyph_map, /* OUT */ + unsigned int *num_glyphs /* OUT */) { if (!retain_gids) { @@ -319,57 +475,73 @@ _nameid_closure (hb_face_t *face, /** * hb_subset_plan_create: + * @face: font face to create the plan for. + * @input: a #hb_subset_input_t input. + * * Computes a plan for subsetting the supplied face according * to a provided input. The plan describes * which tables and glyphs should be retained. * - * Return value: New subset plan. + * Return value: (transfer full): New subset plan. Destroy with + * hb_subset_plan_destroy(). * * Since: 1.7.5 **/ hb_subset_plan_t * -hb_subset_plan_create (hb_face_t *face, - hb_subset_input_t *input) +hb_subset_plan_create (hb_face_t *face, + const hb_subset_input_t *input) { hb_subset_plan_t *plan; if (unlikely (!(plan = hb_object_create<hb_subset_plan_t> ()))) return const_cast<hb_subset_plan_t *> (&Null (hb_subset_plan_t)); plan->successful = true; - plan->drop_hints = input->drop_hints; - plan->desubroutinize = input->desubroutinize; - plan->retain_gids = input->retain_gids; - plan->name_legacy = input->name_legacy; + plan->flags = input->flags; plan->unicodes = hb_set_create (); - plan->name_ids = hb_set_reference (input->name_ids); + plan->name_ids = hb_set_copy (input->sets.name_ids); _nameid_closure (face, plan->name_ids); - plan->name_languages = hb_set_reference (input->name_languages); - plan->glyphs_requested = hb_set_reference (input->glyphs); - plan->drop_tables = hb_set_reference (input->drop_tables); + plan->name_languages = hb_set_copy (input->sets.name_languages); + plan->layout_features = hb_set_copy (input->sets.layout_features); + plan->glyphs_requested = hb_set_copy (input->sets.glyphs); + plan->drop_tables = hb_set_copy (input->sets.drop_tables); + plan->no_subset_tables = hb_set_copy (input->sets.no_subset_tables); plan->source = hb_face_reference (face); plan->dest = hb_face_builder_create (); plan->_glyphset = hb_set_create (); plan->_glyphset_gsub = hb_set_create (); + plan->_glyphset_mathed = hb_set_create (); plan->codepoint_to_glyph = hb_map_create (); plan->glyph_map = hb_map_create (); plan->reverse_glyph_map = hb_map_create (); plan->gsub_lookups = hb_map_create (); plan->gpos_lookups = hb_map_create (); + + if (plan->check_success (plan->gsub_langsys = hb_object_create<script_langsys_map> ())) + plan->gsub_langsys->init_shallow (); + if (plan->check_success (plan->gpos_langsys = hb_object_create<script_langsys_map> ())) + plan->gpos_langsys->init_shallow (); + plan->gsub_features = hb_map_create (); plan->gpos_features = hb_map_create (); + plan->colrv1_layers = hb_map_create (); + plan->colr_palettes = hb_map_create (); plan->layout_variation_indices = hb_set_create (); plan->layout_variation_idx_map = hb_map_create (); + if (plan->in_error ()) { + return plan; + } + + _populate_unicodes_to_retain (input->sets.unicodes, input->sets.glyphs, plan); + _populate_gids_to_retain (plan, - input->unicodes, - input->glyphs, - !input->drop_tables->has (HB_OT_TAG_GSUB), - !input->drop_tables->has (HB_OT_TAG_GPOS), - !input->drop_tables->has (HB_OT_TAG_GDEF)); + !input->sets.drop_tables->has (HB_OT_TAG_GSUB), + !input->sets.drop_tables->has (HB_OT_TAG_GPOS), + !input->sets.drop_tables->has (HB_OT_TAG_GDEF)); _create_old_gid_to_new_gid_map (face, - input->retain_gids, + input->flags & HB_SUBSET_FLAGS_RETAIN_GIDS, plan->_glyphset, plan->glyph_map, plan->reverse_glyph_map, @@ -380,6 +552,10 @@ hb_subset_plan_create (hb_face_t *face, /** * hb_subset_plan_destroy: + * @plan: a #hb_subset_plan_t + * + * Decreases the reference count on @plan, and if it reaches zero, destroys + * @plan, freeing all memory. * * Since: 1.7.5 **/ @@ -391,8 +567,10 @@ hb_subset_plan_destroy (hb_subset_plan_t *plan) hb_set_destroy (plan->unicodes); hb_set_destroy (plan->name_ids); hb_set_destroy (plan->name_languages); + hb_set_destroy (plan->layout_features); hb_set_destroy (plan->glyphs_requested); hb_set_destroy (plan->drop_tables); + hb_set_destroy (plan->no_subset_tables); hb_face_destroy (plan->source); hb_face_destroy (plan->dest); hb_map_destroy (plan->codepoint_to_glyph); @@ -400,13 +578,35 @@ hb_subset_plan_destroy (hb_subset_plan_t *plan) hb_map_destroy (plan->reverse_glyph_map); hb_set_destroy (plan->_glyphset); hb_set_destroy (plan->_glyphset_gsub); + hb_set_destroy (plan->_glyphset_mathed); hb_map_destroy (plan->gsub_lookups); hb_map_destroy (plan->gpos_lookups); hb_map_destroy (plan->gsub_features); hb_map_destroy (plan->gpos_features); + hb_map_destroy (plan->colrv1_layers); + hb_map_destroy (plan->colr_palettes); hb_set_destroy (plan->layout_variation_indices); hb_map_destroy (plan->layout_variation_idx_map); + if (plan->gsub_langsys) + { + for (auto _ : plan->gsub_langsys->iter ()) + hb_set_destroy (_.second); + + hb_object_destroy (plan->gsub_langsys); + plan->gsub_langsys->fini_shallow (); + hb_free (plan->gsub_langsys); + } + + if (plan->gpos_langsys) + { + for (auto _ : plan->gpos_langsys->iter ()) + hb_set_destroy (_.second); + + hb_object_destroy (plan->gpos_langsys); + plan->gpos_langsys->fini_shallow (); + hb_free (plan->gpos_langsys); + } - free (plan); + hb_free (plan); } |