diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh b/thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh index 50e4b54fde..96a394ba42 100644 --- a/thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh +++ b/thirdparty/harfbuzz/src/hb-ot-hmtx-table.hh @@ -73,6 +73,8 @@ struct hmtxvmtx return_trace (true); } + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>>* get_mtx_map (const hb_subset_plan_t *plan) const + { return T::is_horizontal ? plan->hmtx_map : plan->vmtx_map; } bool subset_update_header (hb_subset_plan_t *plan, unsigned int num_hmetrics) const @@ -130,14 +132,15 @@ struct hmtxvmtx accelerator_t _mtx (c->plan->source); unsigned num_long_metrics; + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *mtx_map = get_mtx_map (c->plan); { /* Determine num_long_metrics to encode. */ auto& plan = c->plan; + num_long_metrics = plan->num_output_glyphs (); - hb_codepoint_t old_gid = 0; - unsigned int last_advance = plan->old_gid_for_new_gid (num_long_metrics - 1, &old_gid) ? _mtx.get_advance_without_var_unscaled (old_gid) : 0; + unsigned int last_advance = get_new_gid_advance_unscaled (plan, mtx_map, num_long_metrics - 1, _mtx); while (num_long_metrics > 1 && - last_advance == (plan->old_gid_for_new_gid (num_long_metrics - 2, &old_gid) ? _mtx.get_advance_without_var_unscaled (old_gid) : 0)) + last_advance == get_new_gid_advance_unscaled (plan, mtx_map, num_long_metrics - 2, _mtx)) { num_long_metrics--; } @@ -145,14 +148,18 @@ struct hmtxvmtx auto it = + hb_range (c->plan->num_output_glyphs ()) - | hb_map ([c, &_mtx] (unsigned _) + | hb_map ([c, &_mtx, mtx_map] (unsigned _) { - hb_codepoint_t old_gid; - if (!c->plan->old_gid_for_new_gid (_, &old_gid)) - return hb_pair (0u, 0); - int lsb = 0; - (void) _mtx.get_leading_bearing_without_var_unscaled (old_gid, &lsb); - return hb_pair (_mtx.get_advance_without_var_unscaled (old_gid), +lsb); + if (!mtx_map->has (_)) + { + hb_codepoint_t old_gid; + if (!c->plan->old_gid_for_new_gid (_, &old_gid)) + return hb_pair (0u, 0); + int lsb = 0; + (void) _mtx.get_leading_bearing_without_var_unscaled (old_gid, &lsb); + return hb_pair (_mtx.get_advance_without_var_unscaled (old_gid), +lsb); + } + return mtx_map->get (_); }) ; @@ -330,6 +337,24 @@ struct hmtxvmtx hb_blob_ptr_t<V> var_table; }; + /* get advance: when no variations, call get_advance_without_var_unscaled. + * when there're variations, get advance value from mtx_map in subset_plan*/ + unsigned get_new_gid_advance_unscaled (const hb_subset_plan_t *plan, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *mtx_map, + unsigned new_gid, + const accelerator_t &_mtx) const + { + if (mtx_map->is_empty () || + (new_gid == 0 && !mtx_map->has (new_gid))) + { + hb_codepoint_t old_gid = 0; + return plan->old_gid_for_new_gid (new_gid, &old_gid) ? + _mtx.get_advance_without_var_unscaled (old_gid) : 0; + } + else + { return mtx_map->get (new_gid).first; } + } + protected: UnsizedArrayOf<LongMetric> longMetricZ; /* Paired advance width and leading |