diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh | 262 |
1 files changed, 197 insertions, 65 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh index d5e1fc91d2..e259b33748 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-hmtx-table.hh @@ -31,6 +31,7 @@ #include "hb-ot-maxp-table.hh" #include "hb-ot-hhea-table.hh" #include "hb-ot-var-hvar-table.hh" +#include "hb-ot-var-mvar-table.hh" #include "hb-ot-metrics.hh" /* @@ -43,11 +44,14 @@ #define HB_OT_TAG_vmtx HB_TAG('v','m','t','x') -HB_INTERNAL int -_glyf_get_side_bearing_var (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical); +HB_INTERNAL bool +_glyf_get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical, int *lsb); HB_INTERNAL unsigned -_glyf_get_advance_var (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical); +_glyf_get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical); + +HB_INTERNAL bool +_glyf_get_leading_bearing_without_var_unscaled (hb_face_t *face, hb_codepoint_t gid, bool is_vertical, int *lsb); namespace OT { @@ -62,7 +66,7 @@ struct LongMetric }; -template <typename T, typename H> +template <typename T/*Data table type*/, typename H/*Header table type*/, typename V/*Var table type*/> struct hmtxvmtx { bool sanitize (hb_sanitize_context_t *c HB_UNUSED) const @@ -73,11 +77,15 @@ struct hmtxvmtx return_trace (true); } + const hb_hashmap_t<hb_codepoint_t, 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 + bool subset_update_header (hb_subset_context_t *c, + unsigned int num_hmetrics, + const hb_hashmap_t<hb_codepoint_t, hb_pair_t<unsigned, int>> *mtx_map, + const hb_vector_t<unsigned> &bounds_vec) const { - hb_blob_t *src_blob = hb_sanitize_context_t ().reference_table<H> (plan->source, H::tableTag); + hb_blob_t *src_blob = hb_sanitize_context_t ().reference_table<H> (c->plan->source, H::tableTag); hb_blob_t *dest_blob = hb_blob_copy_writable_or_fail (src_blob); hb_blob_destroy (src_blob); @@ -87,9 +95,83 @@ struct hmtxvmtx unsigned int length; H *table = (H *) hb_blob_get_data (dest_blob, &length); - table->numberOfLongMetrics = num_hmetrics; + c->serializer->check_assign (table->numberOfLongMetrics, num_hmetrics, HB_SERIALIZE_ERROR_INT_OVERFLOW); + +#ifndef HB_NO_VAR + if (c->plan->normalized_coords) + { + auto &MVAR = *c->plan->source->table.MVAR; + if (T::is_horizontal) + { + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_CARET_RISE, caretSlopeRise); + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_CARET_RUN, caretSlopeRun); + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_CARET_OFFSET, caretOffset); + } + else + { + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_VERTICAL_CARET_RISE, caretSlopeRise); + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_VERTICAL_CARET_RUN, caretSlopeRun); + HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_VERTICAL_CARET_OFFSET, caretOffset); + } + + bool empty = true; + int min_lsb = 0x7FFF; + int min_rsb = 0x7FFF; + int max_extent = -0x7FFF; + unsigned max_adv = 0; + for (const auto _ : *mtx_map) + { + hb_codepoint_t gid = _.first; + unsigned adv = _.second.first; + int lsb = _.second.second; + max_adv = hb_max (max_adv, adv); + + if (bounds_vec[gid] != 0xFFFFFFFF) + { + empty = false; + unsigned bound_width = bounds_vec[gid]; + int rsb = adv - lsb - bound_width; + int extent = lsb + bound_width; + min_lsb = hb_min (min_lsb, lsb); + min_rsb = hb_min (min_rsb, rsb); + max_extent = hb_max (max_extent, extent); + } + } + + table->advanceMax = max_adv; + if (!empty) + { + table->minLeadingBearing = min_lsb; + table->minTrailingBearing = min_rsb; + table->maxExtent = max_extent; + } - bool result = plan->add_table (H::tableTag, dest_blob); + if (T::is_horizontal) + { + const auto &OS2 = *c->plan->source->table.OS2; + if (OS2.has_data () && + table->ascender == OS2.sTypoAscender && + table->descender == OS2.sTypoDescender && + table->lineGap == OS2.sTypoLineGap) + { + table->ascender = static_cast<int> (roundf (OS2.sTypoAscender + + MVAR.get_var (HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER, + c->plan->normalized_coords.arrayZ, + c->plan->normalized_coords.length))); + table->descender = static_cast<int> (roundf (OS2.sTypoDescender + + MVAR.get_var (HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER, + c->plan->normalized_coords.arrayZ, + c->plan->normalized_coords.length))); + table->lineGap = static_cast<int> (roundf (OS2.sTypoLineGap + + MVAR.get_var (HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP, + c->plan->normalized_coords.arrayZ, + c->plan->normalized_coords.length))); + } + } + } +#endif + + bool result = c->plan->add_table (H::tableTag, dest_blob); hb_blob_destroy (dest_blob); return result; @@ -99,25 +181,32 @@ struct hmtxvmtx hb_requires (hb_is_iterator (Iterator))> void serialize (hb_serialize_context_t *c, Iterator it, - unsigned num_long_metrics) + const hb_vector_t<hb_codepoint_pair_t> new_to_old_gid_list, + unsigned num_long_metrics, + unsigned total_num_metrics) { - unsigned idx = 0; - for (auto _ : it) + LongMetric* long_metrics = c->allocate_size<LongMetric> (num_long_metrics * LongMetric::static_size); + FWORD* short_metrics = c->allocate_size<FWORD> ((total_num_metrics - num_long_metrics) * FWORD::static_size); + if (!long_metrics || !short_metrics) return; + + short_metrics -= num_long_metrics; + + for (auto _ : new_to_old_gid_list) { - if (idx < num_long_metrics) + hb_codepoint_t gid = _.first; + auto mtx = *it++; + + if (gid < num_long_metrics) { - LongMetric lm; - lm.advance = _.first; - lm.sb = _.second; - if (unlikely (!c->embed<LongMetric> (&lm))) return; + LongMetric& lm = long_metrics[gid]; + lm.advance = mtx.first; + lm.sb = mtx.second; } + // TODO(beyond-64k): This assumes that maxp.numGlyphs is 0xFFFF. + else if (gid < 0x10000u) + short_metrics[gid] = mtx.second; else - { - FWORD *sb = c->allocate_size<FWORD> (FWORD::static_size); - if (unlikely (!sb)) return; - *sb = _.second; - } - idx++; + ((UFWORD*) short_metrics)[gid] = mtx.first; } } @@ -125,42 +214,57 @@ struct hmtxvmtx { TRACE_SUBSET (this); - T *table_prime = c->serializer->start_embed <T> (); - if (unlikely (!table_prime)) return_trace (false); + auto *table_prime = c->serializer->start_embed <T> (); accelerator_t _mtx (c->plan->source); unsigned num_long_metrics; + const hb_hashmap_t<hb_codepoint_t, 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 (old_gid) : 0; + + // TODO Don't consider retaingid holes here. + + num_long_metrics = hb_min (plan->num_output_glyphs (), 0xFFFFu); + 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 (old_gid) : 0)) + last_advance == get_new_gid_advance_unscaled (plan, mtx_map, num_long_metrics - 2, _mtx)) { num_long_metrics--; } } auto it = - + hb_range (c->plan->num_output_glyphs ()) - | hb_map ([c, &_mtx] (unsigned _) + + hb_iter (c->plan->new_to_old_gid_list) + | hb_map ([c, &_mtx, mtx_map] (hb_codepoint_pair_t _) { - hb_codepoint_t old_gid; - if (!c->plan->old_gid_for_new_gid (_, &old_gid)) - return hb_pair (0u, 0); - return hb_pair (_mtx.get_advance (old_gid), _mtx.get_side_bearing (old_gid)); + hb_codepoint_t new_gid = _.first; + hb_codepoint_t old_gid = _.second; + + hb_pair_t<unsigned, int> *v = nullptr; + if (!mtx_map->has (new_gid, &v)) + { + int lsb = 0; + if (!_mtx.get_leading_bearing_without_var_unscaled (old_gid, &lsb)) + (void) _glyf_get_leading_bearing_without_var_unscaled (c->plan->source, old_gid, !T::is_horizontal, &lsb); + return hb_pair (_mtx.get_advance_without_var_unscaled (old_gid), +lsb); + } + return *v; }) ; - table_prime->serialize (c->serializer, it, num_long_metrics); + table_prime->serialize (c->serializer, + it, + c->plan->new_to_old_gid_list, + num_long_metrics, + c->plan->num_output_glyphs ()); if (unlikely (c->serializer->in_error ())) return_trace (false); // Amend header num hmetrics - if (unlikely (!subset_update_header (c->plan, num_long_metrics))) + if (unlikely (!subset_update_header (c, num_long_metrics, mtx_map, + T::is_horizontal ? c->plan->bounds_width_vec : c->plan->bounds_height_vec))) return_trace (false); return_trace (true); @@ -173,7 +277,7 @@ struct hmtxvmtx accelerator_t (hb_face_t *face) { table = hb_sanitize_context_t ().reference_table<hmtxvmtx> (face, T::tableTag); - var_table = hb_sanitize_context_t ().reference_table<HVARVVAR> (face, T::variationsTag); + var_table = hb_sanitize_context_t ().reference_table<V> (face, T::variationsTag); default_advance = T::is_horizontal ? hb_face_get_upem (face) / 2 : hb_face_get_upem (face); @@ -221,36 +325,46 @@ struct hmtxvmtx bool has_data () const { return (bool) num_bearings; } - int get_side_bearing (hb_codepoint_t glyph) const + bool get_leading_bearing_without_var_unscaled (hb_codepoint_t glyph, + int *lsb) const { if (glyph < num_long_metrics) - return table->longMetricZ[glyph].sb; + { + *lsb = table->longMetricZ[glyph].sb; + return true; + } if (unlikely (glyph >= num_bearings)) - return 0; + return false; const FWORD *bearings = (const FWORD *) &table->longMetricZ[num_long_metrics]; - return bearings[glyph - num_long_metrics]; + *lsb = bearings[glyph - num_long_metrics]; + return true; } - int get_side_bearing (hb_font_t *font, hb_codepoint_t glyph) const + bool get_leading_bearing_with_var_unscaled (hb_font_t *font, + hb_codepoint_t glyph, + int *lsb) const { - int side_bearing = get_side_bearing (glyph); + if (!font->num_coords) + return get_leading_bearing_without_var_unscaled (glyph, lsb); #ifndef HB_NO_VAR - if (unlikely (glyph >= num_bearings) || !font->num_coords) - return side_bearing; - - if (var_table.get_length ()) - return side_bearing + var_table->get_side_bearing_var (glyph, font->coords, font->num_coords); // TODO Optimize?! + float delta; + if (var_table->get_lsb_delta_unscaled (glyph, font->coords, font->num_coords, &delta) && + get_leading_bearing_without_var_unscaled (glyph, lsb)) + { + *lsb += roundf (delta); + return true; + } - return _glyf_get_side_bearing_var (font, glyph, T::tableTag == HB_OT_TAG_vmtx); + return _glyf_get_leading_bearing_with_var_unscaled (font, glyph, T::tableTag == HB_OT_TAG_vmtx, lsb); #else - return side_bearing; + return false; #endif } - unsigned int get_advance (hb_codepoint_t glyph) const + unsigned int get_advance_without_var_unscaled (hb_codepoint_t glyph) const { /* OpenType case. */ if (glyph < num_bearings) @@ -262,7 +376,7 @@ struct hmtxvmtx if (unlikely (!num_advances)) return default_advance; -#ifdef HB_NO_BORING_EXPANSION +#ifdef HB_NO_BEYOND_64K return 0; #endif @@ -272,10 +386,8 @@ struct hmtxvmtx /* num_bearings <= glyph < num_glyphs; * num_bearings <= num_advances */ - /* TODO Optimize */ - if (num_bearings == num_advances) - return get_advance (num_bearings - 1); + return get_advance_without_var_unscaled (num_bearings - 1); const FWORD *bearings = (const FWORD *) &table->longMetricZ[num_long_metrics]; const UFWORD *advances = (const UFWORD *) &bearings[num_bearings - num_long_metrics]; @@ -283,19 +395,23 @@ struct hmtxvmtx return advances[hb_min (glyph - num_bearings, num_advances - num_bearings - 1)]; } - unsigned int get_advance (hb_codepoint_t glyph, - hb_font_t *font) const + unsigned get_advance_with_var_unscaled (hb_codepoint_t glyph, + hb_font_t *font, + ItemVariationStore::cache_t *store_cache = nullptr) const { - unsigned int advance = get_advance (glyph); + unsigned int advance = get_advance_without_var_unscaled (glyph); #ifndef HB_NO_VAR if (unlikely (glyph >= num_bearings) || !font->num_coords) return advance; if (var_table.get_length ()) - return advance + roundf (var_table->get_advance_var (glyph, font)); // TODO Optimize?! + return advance + roundf (var_table->get_advance_delta_unscaled (glyph, + font->coords, font->num_coords, + store_cache)); - return _glyf_get_advance_var (font, glyph, T::tableTag == HB_OT_TAG_vmtx); + unsigned glyf_advance = _glyf_get_advance_with_var_unscaled (font, glyph, T::tableTag == HB_OT_TAG_vmtx); + return glyf_advance ? glyf_advance : advance; #else return advance; #endif @@ -310,11 +426,27 @@ struct hmtxvmtx unsigned int default_advance; - private: + public: hb_blob_ptr_t<hmtxvmtx> table; - hb_blob_ptr_t<HVARVVAR> var_table; + 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<hb_codepoint_t, hb_pair_t<unsigned, int>> *mtx_map, + unsigned new_gid, + const accelerator_t &_mtx) const + { + if (mtx_map->is_empty ()) + { + 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; + } + return mtx_map->get (new_gid).first; + } + protected: UnsizedArrayOf<LongMetric> longMetricZ; /* Paired advance width and leading @@ -345,12 +477,12 @@ struct hmtxvmtx DEFINE_SIZE_ARRAY (0, longMetricZ); }; -struct hmtx : hmtxvmtx<hmtx, hhea> { +struct hmtx : hmtxvmtx<hmtx, hhea, HVAR> { static constexpr hb_tag_t tableTag = HB_OT_TAG_hmtx; static constexpr hb_tag_t variationsTag = HB_OT_TAG_HVAR; static constexpr bool is_horizontal = true; }; -struct vmtx : hmtxvmtx<vmtx, vhea> { +struct vmtx : hmtxvmtx<vmtx, vhea, VVAR> { static constexpr hb_tag_t tableTag = HB_OT_TAG_vmtx; static constexpr hb_tag_t variationsTag = HB_OT_TAG_VVAR; static constexpr bool is_horizontal = false; |