diff options
Diffstat (limited to 'src/hb-ot-layout-common.hh')
| -rw-r--r-- | src/hb-ot-layout-common.hh | 455 |
1 files changed, 415 insertions, 40 deletions
diff --git a/src/hb-ot-layout-common.hh b/src/hb-ot-layout-common.hh index b3af128e0..e869d8ece 100644 --- a/src/hb-ot-layout-common.hh +++ b/src/hb-ot-layout-common.hh @@ -191,27 +191,15 @@ struct hb_collect_variation_indices_context_t : static return_t default_return_value () { return hb_empty_t (); } hb_set_t *layout_variation_indices; - hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *varidx_delta_map; - hb_vector_t<int> *normalized_coords; - const VariationStore *var_store; const hb_set_t *glyph_set; const hb_map_t *gpos_lookups; - float *store_cache; hb_collect_variation_indices_context_t (hb_set_t *layout_variation_indices_, - hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *varidx_delta_map_, - hb_vector_t<int> *normalized_coords_, - const VariationStore *var_store_, const hb_set_t *glyph_set_, - const hb_map_t *gpos_lookups_, - float *store_cache_) : + const hb_map_t *gpos_lookups_) : layout_variation_indices (layout_variation_indices_), - varidx_delta_map (varidx_delta_map_), - normalized_coords (normalized_coords_), - var_store (var_store_), glyph_set (glyph_set_), - gpos_lookups (gpos_lookups_), - store_cache (store_cache_) {} + gpos_lookups (gpos_lookups_) {} }; template<typename OutputArray> @@ -1937,13 +1925,22 @@ struct ClassDefFormat2_4 { /* Match if there's any glyph that is not listed! */ hb_codepoint_t g = HB_SET_VALUE_INVALID; - for (auto &range : rangeRecord) + hb_codepoint_t last = HB_SET_VALUE_INVALID; + auto it = hb_iter (rangeRecord); + for (auto &range : it) { + if (it->first == last + 1) + { + it++; + continue; + } + if (!glyphs->next (&g)) break; if (g < range.first) return true; g = range.last; + last = g; } if (g != HB_SET_VALUE_INVALID && glyphs->next (&g)) return true; @@ -2291,6 +2288,158 @@ static inline bool ClassDef_serialize (hb_serialize_context_t *c, * Item Variation Store */ +/* ported from fonttools (class _Encoding) */ +struct delta_row_encoding_t +{ + /* each byte represents a region, value is one of 0/1/2/4, which means bytes + * needed for this region */ + hb_vector_t<uint8_t> chars; + unsigned width = 0; + hb_vector_t<uint8_t> columns; + unsigned overhead = 0; + hb_vector_t<const hb_vector_t<int>*> items; + + delta_row_encoding_t () = default; + delta_row_encoding_t (hb_vector_t<uint8_t>&& chars_, + const hb_vector_t<int>* row = nullptr) : + delta_row_encoding_t () + + { + chars = std::move (chars_); + width = get_width (); + columns = get_columns (); + overhead = get_chars_overhead (columns); + if (row) items.push (row); + } + + bool is_empty () const + { return !items; } + + static hb_vector_t<uint8_t> get_row_chars (const hb_vector_t<int>& row) + { + hb_vector_t<uint8_t> ret; + if (!ret.alloc (row.length)) return ret; + + bool long_words = false; + + /* 0/1/2 byte encoding */ + for (int i = row.length - 1; i >= 0; i--) + { + int v = row.arrayZ[i]; + if (v == 0) + ret.push (0); + else if (v > 32767 || v < -32768) + { + long_words = true; + break; + } + else if (v > 127 || v < -128) + ret.push (2); + else + ret.push (1); + } + + if (!long_words) + return ret; + + /* redo, 0/2/4 bytes encoding */ + ret.reset (); + for (int i = row.length - 1; i >= 0; i--) + { + int v = row.arrayZ[i]; + if (v == 0) + ret.push (0); + else if (v > 32767 || v < -32768) + ret.push (4); + else + ret.push (2); + } + return ret; + } + + inline unsigned get_width () + { + unsigned ret = + hb_iter (chars) + | hb_reduce (hb_add, 0u) + ; + return ret; + } + + hb_vector_t<uint8_t> get_columns () + { + hb_vector_t<uint8_t> cols; + cols.alloc (chars.length); + for (auto v : chars) + { + uint8_t flag = v ? 1 : 0; + cols.push (flag); + } + return cols; + } + + static inline unsigned get_chars_overhead (const hb_vector_t<uint8_t>& cols) + { + unsigned c = 4 + 6; // 4 bytes for LOffset, 6 bytes for VarData header + unsigned cols_bit_count = 0; + for (auto v : cols) + if (v) cols_bit_count++; + return c + cols_bit_count * 2; + } + + unsigned get_gain () const + { + int count = items.length; + return hb_max (0, (int) overhead - count); + } + + int gain_from_merging (const delta_row_encoding_t& other_encoding) const + { + int combined_width = 0; + for (unsigned i = 0; i < chars.length; i++) + combined_width += hb_max (chars.arrayZ[i], other_encoding.chars.arrayZ[i]); + + hb_vector_t<uint8_t> combined_columns; + combined_columns.alloc (columns.length); + for (unsigned i = 0; i < columns.length; i++) + combined_columns.push (columns.arrayZ[i] | other_encoding.columns.arrayZ[i]); + + int combined_overhead = get_chars_overhead (combined_columns); + int combined_gain = (int) overhead + (int) other_encoding.overhead - combined_overhead + - (combined_width - (int) width) * items.length + - (combined_width - (int) other_encoding.width) * other_encoding.items.length; + + return combined_gain; + } + + static int cmp (const void *pa, const void *pb) + { + const delta_row_encoding_t *a = (const delta_row_encoding_t *)pa; + const delta_row_encoding_t *b = (const delta_row_encoding_t *)pb; + + int gain_a = a->get_gain (); + int gain_b = b->get_gain (); + + if (gain_a != gain_b) + return gain_a - gain_b; + + return (b->chars).as_array ().cmp ((a->chars).as_array ()); + } + + static int cmp_width (const void *pa, const void *pb) + { + const delta_row_encoding_t *a = (const delta_row_encoding_t *)pa; + const delta_row_encoding_t *b = (const delta_row_encoding_t *)pb; + + if (a->width != b->width) + return (int) a->width - (int) b->width; + + return (b->chars).as_array ().cmp ((a->chars).as_array ()); + } + + bool add_row (const hb_vector_t<int>* row) + { return items.push (row); } +}; + struct VarRegionAxis { float evaluate (int coord) const @@ -2325,6 +2474,12 @@ struct VarRegionAxis * have to do that at runtime. */ } + bool serialize (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + return_trace (c->embed (this)); + } + public: F2DOT14 startCoord; F2DOT14 peakCoord; @@ -2382,6 +2537,47 @@ struct VarRegionList return_trace (c->check_struct (this) && axesZ.sanitize (c, axisCount * regionCount)); } + bool serialize (hb_serialize_context_t *c, + const hb_vector_t<hb_tag_t>& axis_tags, + const hb_vector_t<const hb_hashmap_t<hb_tag_t, Triple>*>& regions) + { + TRACE_SERIALIZE (this); + unsigned axis_count = axis_tags.length; + unsigned region_count = regions.length; + if (!axis_count || !region_count) return_trace (false); + if (unlikely (hb_unsigned_mul_overflows (axis_count * region_count, + VarRegionAxis::static_size))) return_trace (false); + if (unlikely (!c->extend_min (this))) return_trace (false); + axisCount = axis_count; + regionCount = region_count; + + for (unsigned r = 0; r < region_count; r++) + { + const auto& region = regions[r]; + for (unsigned i = 0; i < axis_count; i++) + { + hb_tag_t tag = axis_tags.arrayZ[i]; + VarRegionAxis var_region_rec; + Triple *coords; + if (region->has (tag, &coords)) + { + var_region_rec.startCoord.set_float (coords->minimum); + var_region_rec.peakCoord.set_float (coords->middle); + var_region_rec.endCoord.set_float (coords->maximum); + } + else + { + var_region_rec.startCoord.set_int (0); + var_region_rec.peakCoord.set_int (0); + var_region_rec.endCoord.set_int (0); + } + if (!var_region_rec.serialize (c)) + return_trace (false); + } + } + return_trace (true); + } + bool serialize (hb_serialize_context_t *c, const VarRegionList *src, const hb_inc_bimap_t ®ion_map) { TRACE_SERIALIZE (this); @@ -2402,6 +2598,45 @@ struct VarRegionList return_trace (true); } + bool get_var_region (unsigned region_index, + const hb_map_t& axes_old_index_tag_map, + hb_hashmap_t<hb_tag_t, Triple>& axis_tuples /* OUT */) const + { + if (region_index >= regionCount) return false; + const VarRegionAxis* axis_region = axesZ.arrayZ + (region_index * axisCount); + for (unsigned i = 0; i < axisCount; i++) + { + hb_tag_t *axis_tag; + if (!axes_old_index_tag_map.has (i, &axis_tag)) + return false; + + float min_val = axis_region->startCoord.to_float (); + float def_val = axis_region->peakCoord.to_float (); + float max_val = axis_region->endCoord.to_float (); + + if (def_val != 0.f) + axis_tuples.set (*axis_tag, Triple (min_val, def_val, max_val)); + axis_region++; + } + return !axis_tuples.in_error (); + } + + bool get_var_regions (const hb_map_t& axes_old_index_tag_map, + hb_vector_t<hb_hashmap_t<hb_tag_t, Triple>>& regions /* OUT */) const + { + if (!regions.alloc (regionCount)) + return false; + + for (unsigned i = 0; i < regionCount; i++) + { + hb_hashmap_t<hb_tag_t, Triple> axis_tuples; + if (!get_var_region (i, axes_old_index_tag_map, axis_tuples)) + return false; + regions.push (std::move (axis_tuples)); + } + return !regions.in_error (); + } + unsigned int get_size () const { return min_size + VarRegionAxis::static_size * axisCount * regionCount; } public: @@ -2421,6 +2656,9 @@ struct VarData unsigned int get_region_index_count () const { return regionIndices.len; } + + unsigned get_region_index (unsigned i) const + { return i >= regionIndices.len ? -1 : regionIndices[i]; } unsigned int get_row_size () const { return (wordCount () + regionIndices.len) * (longWords () ? 2 : 1); } @@ -2497,6 +2735,81 @@ struct VarData } bool serialize (hb_serialize_context_t *c, + bool has_long, + const hb_vector_t<const hb_vector_t<int>*>& rows) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + unsigned row_count = rows.length; + itemCount = row_count; + + int min_threshold = has_long ? -65536 : -128; + int max_threshold = has_long ? +65535 : +127; + enum delta_size_t { kZero=0, kNonWord, kWord }; + hb_vector_t<delta_size_t> delta_sz; + unsigned num_regions = rows[0]->length; + if (!delta_sz.resize (num_regions)) + return_trace (false); + + unsigned word_count = 0; + for (unsigned r = 0; r < num_regions; r++) + { + for (unsigned i = 0; i < row_count; i++) + { + int delta = rows[i]->arrayZ[r]; + if (delta < min_threshold || delta > max_threshold) + { + delta_sz[r] = kWord; + word_count++; + break; + } + else if (delta != 0) + { + delta_sz[r] = kNonWord; + } + } + } + + /* reorder regions: words and then non-words*/ + unsigned word_index = 0; + unsigned non_word_index = word_count; + hb_map_t ri_map; + for (unsigned r = 0; r < num_regions; r++) + { + if (!delta_sz[r]) continue; + unsigned new_r = (delta_sz[r] == kWord)? word_index++ : non_word_index++; + if (!ri_map.set (new_r, r)) + return_trace (false); + } + + wordSizeCount = word_count | (has_long ? 0x8000u /* LONG_WORDS */ : 0); + + unsigned ri_count = ri_map.get_population (); + regionIndices.len = ri_count; + if (unlikely (!c->extend (this))) return_trace (false); + + for (unsigned r = 0; r < ri_count; r++) + { + hb_codepoint_t *idx; + if (!ri_map.has (r, &idx)) + return_trace (false); + regionIndices[r] = *idx; + } + + HBUINT8 *delta_bytes = get_delta_bytes (); + unsigned row_size = get_row_size (); + for (unsigned int i = 0; i < row_count; i++) + { + for (unsigned int r = 0; r < ri_count; r++) + { + int delta = rows[i]->arrayZ[ri_map[r]]; + set_item_delta_fast (i, r, delta, delta_bytes, row_size); + } + } + return_trace (true); + } + + bool serialize (hb_serialize_context_t *c, const VarData *src, const hb_inc_bimap_t &inner_map, const hb_inc_bimap_t ®ion_map) @@ -2616,13 +2929,15 @@ struct VarData } } - protected: + public: const HBUINT8 *get_delta_bytes () const { return &StructAfter<HBUINT8> (regionIndices); } + protected: HBUINT8 *get_delta_bytes () { return &StructAfter<HBUINT8> (regionIndices); } + public: int32_t get_item_delta_fast (unsigned int item, unsigned int region, const HBUINT8 *delta_bytes, unsigned row_size) const { @@ -2653,6 +2968,7 @@ struct VarData get_row_size ()); } + protected: void set_item_delta_fast (unsigned int item, unsigned int region, int32_t delta, HBUINT8 *delta_bytes, unsigned row_size) { @@ -2695,6 +3011,7 @@ struct VarData struct VariationStore { + friend struct item_variations_t; using cache_t = VarRegionList::cache_t; cache_t *create_cache () const @@ -2766,6 +3083,36 @@ struct VariationStore } bool serialize (hb_serialize_context_t *c, + bool has_long, + const hb_vector_t<hb_tag_t>& axis_tags, + const hb_vector_t<const hb_hashmap_t<hb_tag_t, Triple>*>& region_list, + const hb_vector_t<delta_row_encoding_t>& vardata_encodings) + { + TRACE_SERIALIZE (this); +#ifdef HB_NO_VAR + return_trace (false); +#endif + if (unlikely (!c->extend_min (this))) return_trace (false); + + format = 1; + if (!regions.serialize_serialize (c, axis_tags, region_list)) + return_trace (false); + + unsigned num_var_data = vardata_encodings.length; + if (!num_var_data) return_trace (false); + if (unlikely (!c->check_assign (dataSets.len, num_var_data, + HB_SERIALIZE_ERROR_INT_OVERFLOW))) + return_trace (false); + + if (unlikely (!c->extend (dataSets))) return_trace (false); + for (unsigned i = 0; i < num_var_data; i++) + if (!dataSets[i].serialize_serialize (c, has_long, vardata_encodings[i].items)) + return_trace (false); + + return_trace (true); + } + + bool serialize (hb_serialize_context_t *c, const VariationStore *src, const hb_array_t <const hb_inc_bimap_t> &inner_maps) { @@ -2894,6 +3241,22 @@ struct VariationStore return dataSets.len; } + const VarData& get_sub_table (unsigned i) const + { +#ifdef HB_NO_VAR + return Null (VarData); +#endif + return this+dataSets[i]; + } + + const VarRegionList& get_region_list () const + { +#ifdef HB_NO_VAR + return Null (VarRegionList); +#endif + return this+regions; + } + protected: HBUINT16 format; Offset32To<VarRegionList> regions; @@ -2928,9 +3291,29 @@ struct ConditionFormat1 const hb_map_t *index_map = &c->plan->axes_index_map; if (index_map->is_empty ()) return_trace (true); - if (!index_map->has (axisIndex)) + const hb_map_t& axes_old_index_tag_map = c->plan->axes_old_index_tag_map; + hb_codepoint_t *axis_tag; + if (!axes_old_index_tag_map.has (axisIndex, &axis_tag) || + !index_map->has (axisIndex)) return_trace (false); + const hb_hashmap_t<hb_tag_t, Triple>& normalized_axes_location = c->plan->axes_location; + Triple axis_limit{-1.f, 0.f, 1.f}; + Triple *normalized_limit; + if (normalized_axes_location.has (*axis_tag, &normalized_limit)) + axis_limit = *normalized_limit; + + const hb_hashmap_t<hb_tag_t, TripleDistances>& axes_triple_distances = c->plan->axes_triple_distances; + TripleDistances axis_triple_distances{1.f, 1.f}; + TripleDistances *triple_dists; + if (axes_triple_distances.has (*axis_tag, &triple_dists)) + axis_triple_distances = *triple_dists; + + float normalized_min = renormalizeValue (filterRangeMinValue.to_float (), axis_limit, axis_triple_distances, false); + float normalized_max = renormalizeValue (filterRangeMaxValue.to_float (), axis_limit, axis_triple_distances, false); + out->filterRangeMinValue.set_float (normalized_min); + out->filterRangeMaxValue.set_float (normalized_max); + return_trace (c->serializer->check_assign (out->axisIndex, index_map->get (axisIndex), HB_SERIALIZE_ERROR_INT_OVERFLOW)); } @@ -2946,15 +3329,16 @@ struct ConditionFormat1 hb_tag_t axis_tag = c->axes_index_tag_map->get (axisIndex); Triple axis_range (-1.f, 0.f, 1.f); - if (c->axes_location->has (axis_tag)) - axis_range = c->axes_location->get (axis_tag); + Triple *axis_limit; + if (c->axes_location->has (axis_tag, &axis_limit)) + axis_range = *axis_limit; - int axis_min_val = axis_range.minimum; - int axis_default_val = axis_range.middle; - int axis_max_val = axis_range.maximum; + float axis_min_val = axis_range.minimum; + float axis_default_val = axis_range.middle; + float axis_max_val = axis_range.maximum; - int16_t filter_min_val = filterRangeMinValue.to_int (); - int16_t filter_max_val = filterRangeMaxValue.to_int (); + float filter_min_val = filterRangeMinValue.to_float (); + float filter_max_val = filterRangeMaxValue.to_float (); if (axis_default_val < filter_min_val || axis_default_val > filter_max_val) @@ -2974,7 +3358,9 @@ struct ConditionFormat1 { // add axisIndex->value into the hashmap so we can check if the record is // unique with variations - hb_codepoint_t val = (filter_max_val << 16) + filter_min_val; + int16_t int_filter_max_val = filterRangeMaxValue.to_int (); + int16_t int_filter_min_val = filterRangeMinValue.to_int (); + hb_codepoint_t val = (int_filter_max_val << 16) + int_filter_min_val; condition_map->set (axisIndex, val); return KEEP_COND_WITH_VAR; @@ -3183,8 +3569,7 @@ struct FeatureTableSubstitutionRecord if (unlikely (!out)) return_trace (false); out->featureIndex = c->feature_index_map->get (featureIndex); - bool ret = out->feature.serialize_subset (c->subset_context, feature, base, c); - return_trace (ret); + return_trace (out->feature.serialize_subset (c->subset_context, feature, base, c)); } bool sanitize (hb_sanitize_context_t *c, const void *base) const @@ -3583,23 +3968,13 @@ struct VariationDevice auto *out = c->embed (this); if (unlikely (!out)) return_trace (nullptr); - unsigned new_idx = hb_first (*v); - out->varIdx = new_idx; + if (!c->check_assign (out->varIdx, hb_first (*v), HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (nullptr); return_trace (out); } void collect_variation_index (hb_collect_variation_indices_context_t *c) const - { - c->layout_variation_indices->add (varIdx); - int delta = 0; - if (c->normalized_coords && c->var_store) - delta = roundf (c->var_store->get_delta (varIdx, c->normalized_coords->arrayZ, - c->normalized_coords->length, c->store_cache)); - - /* set new varidx to HB_OT_LAYOUT_NO_VARIATIONS_INDEX here, will remap - * varidx later*/ - c->varidx_delta_map->set (varIdx, hb_pair_t<unsigned, int> (HB_OT_LAYOUT_NO_VARIATIONS_INDEX, delta)); - } + { c->layout_variation_indices->add (varIdx); } bool sanitize (hb_sanitize_context_t *c) const { |