diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh | 252 |
1 files changed, 247 insertions, 5 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh index 65f26c1d22..b2e5d87a3c 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-var-avar-table.hh @@ -28,6 +28,8 @@ #define HB_OT_VAR_AVAR_TABLE_HH #include "hb-open-type.hh" +#include "hb-ot-var-common.hh" + /* * avar -- Axis Variations @@ -40,6 +42,28 @@ namespace OT { +/* "Spec": https://github.com/be-fonts/boring-expansion-spec/issues/14 */ +struct avarV2Tail +{ + friend struct avar; + + bool sanitize (hb_sanitize_context_t *c, + const void *base) const + { + TRACE_SANITIZE (this); + return_trace (varIdxMap.sanitize (c, base) && + varStore.sanitize (c, base)); + } + + protected: + Offset32To<DeltaSetIndexMap> varIdxMap; /* Offset from the beginning of 'avar' table. */ + Offset32To<VariationStore> varStore; /* Offset from the beginning of 'avar' table. */ + + public: + DEFINE_SIZE_STATIC (8); +}; + + struct AxisValueMap { bool sanitize (hb_sanitize_context_t *c) const @@ -48,6 +72,65 @@ struct AxisValueMap return_trace (c->check_struct (this)); } + void set_mapping (float from_coord, float to_coord) + { + coords[0].set_float (from_coord); + coords[1].set_float (to_coord); + } + + bool is_outside_axis_range (const Triple& axis_range) const + { + float from_coord = coords[0].to_float (); + return !axis_range.contains (from_coord); + } + + bool must_include () const + { + float from_coord = coords[0].to_float (); + float to_coord = coords[1].to_float (); + return (from_coord == -1.f && to_coord == -1.f) || + (from_coord == 0.f && to_coord == 0.f) || + (from_coord == 1.f && to_coord == 1.f); + } + + void instantiate (const Triple& axis_range, + const Triple& unmapped_range, + const TripleDistances& triple_distances) + { + float from_coord = coords[0].to_float (); + float to_coord = coords[1].to_float (); + + from_coord = renormalizeValue (from_coord, unmapped_range, triple_distances); + to_coord = renormalizeValue (to_coord, axis_range, triple_distances); + + coords[0].set_float (from_coord); + coords[1].set_float (to_coord); + } + + HB_INTERNAL static int cmp (const void *pa, const void *pb) + { + const AxisValueMap *a = (const AxisValueMap *) pa; + const AxisValueMap *b = (const AxisValueMap *) pb; + + int a_from = a->coords[0].to_int (); + int b_from = b->coords[0].to_int (); + if (a_from != b_from) + return a_from - b_from; + + /* this should never be reached. according to the spec, all of the axis + * value map records for a given axis must have different fromCoord values + * */ + int a_to = a->coords[1].to_int (); + int b_to = b->coords[1].to_int (); + return a_to - b_to; + } + + bool serialize (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + return_trace (c->embed (this)); + } + public: F2DOT14 coords[2]; // F2DOT14 fromCoord; /* A normalized coordinate value obtained using @@ -62,8 +145,8 @@ struct SegmentMaps : Array16Of<AxisValueMap> { int map (int value, unsigned int from_offset = 0, unsigned int to_offset = 1) const { -#define fromCoord coords[from_offset] -#define toCoord coords[to_offset] +#define fromCoord coords[from_offset].to_int () +#define toCoord coords[to_offset].to_int () /* The following special-cases are not part of OpenType, which requires * that at least -1, 0, and +1 must be mapped. But we include these as * part of a better error recovery scheme. */ @@ -98,6 +181,78 @@ struct SegmentMaps : Array16Of<AxisValueMap> int unmap (int value) const { return map (value, 1, 0); } + Triple unmap_axis_range (const Triple& axis_range) const + { + F2DOT14 val, unmapped_val; + + val.set_float (axis_range.minimum); + unmapped_val.set_int (unmap (val.to_int ())); + float unmapped_min = unmapped_val.to_float (); + + val.set_float (axis_range.middle); + unmapped_val.set_int (unmap (val.to_int ())); + float unmapped_middle = unmapped_val.to_float (); + + val.set_float (axis_range.maximum); + unmapped_val.set_int (unmap (val.to_int ())); + float unmapped_max = unmapped_val.to_float (); + + return Triple{unmapped_min, unmapped_middle, unmapped_max}; + } + + bool subset (hb_subset_context_t *c, hb_tag_t axis_tag) const + { + TRACE_SUBSET (this); + /* avar mapped normalized axis range*/ + Triple *axis_range; + if (!c->plan->axes_location.has (axis_tag, &axis_range)) + return c->serializer->embed (*this); + + TripleDistances *axis_triple_distances; + if (!c->plan->axes_triple_distances.has (axis_tag, &axis_triple_distances)) + return_trace (false); + + auto *out = c->serializer->start_embed (this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + Triple unmapped_range = unmap_axis_range (*axis_range); + + /* create a vector of retained mappings and sort */ + hb_vector_t<AxisValueMap> value_mappings; + for (const auto& _ : as_array ()) + { + if (_.is_outside_axis_range (unmapped_range)) + continue; + AxisValueMap mapping; + mapping = _; + mapping.instantiate (*axis_range, unmapped_range, *axis_triple_distances); + /* (-1, -1), (0, 0), (1, 1) mappings will be added later, so avoid + * duplicates here */ + if (mapping.must_include ()) + continue; + value_mappings.push (std::move (mapping)); + } + + AxisValueMap m; + m.set_mapping (-1.f, -1.f); + value_mappings.push (m); + + m.set_mapping (0.f, 0.f); + value_mappings.push (m); + + m.set_mapping (1.f, 1.f); + value_mappings.push (m); + + value_mappings.qsort (); + + for (const auto& _ : value_mappings) + { + if (!_.serialize (c->serializer)) + return_trace (false); + } + return_trace (c->serializer->check_assign (out->len, value_mappings.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)); + } + public: DEFINE_SIZE_ARRAY (2, *this); }; @@ -106,12 +261,25 @@ struct avar { static constexpr hb_tag_t tableTag = HB_OT_TAG_avar; + bool has_data () const { return version.to_int (); } + + const SegmentMaps* get_segment_maps () const + { return &firstAxisSegmentMaps; } + + unsigned get_axis_count () const + { return axisCount; } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); - if (unlikely (!(version.sanitize (c) && - version.major == 1 && - c->check_struct (this)))) + if (!(version.sanitize (c) && + hb_barrier () && + (version.major == 1 +#ifndef HB_NO_AVAR2 + || version.major == 2 +#endif + ) && + c->check_struct (this))) return_trace (false); const SegmentMaps *map = &firstAxisSegmentMaps; @@ -123,6 +291,16 @@ struct avar map = &StructAfter<SegmentMaps> (*map); } +#ifndef HB_NO_AVAR2 + if (version.major < 2) + return_trace (true); + hb_barrier (); + + const auto &v2 = * (const avarV2Tail *) map; + if (unlikely (!v2.sanitize (c, this))) + return_trace (false); +#endif + return_trace (true); } @@ -136,6 +314,37 @@ struct avar coords[i] = map->map (coords[i]); map = &StructAfter<SegmentMaps> (*map); } + +#ifndef HB_NO_AVAR2 + if (version.major < 2) + return; + hb_barrier (); + + for (; count < axisCount; count++) + map = &StructAfter<SegmentMaps> (*map); + + const auto &v2 = * (const avarV2Tail *) map; + + const auto &varidx_map = this+v2.varIdxMap; + const auto &var_store = this+v2.varStore; + auto *var_store_cache = var_store.create_cache (); + + hb_vector_t<int> out; + out.alloc (coords_length); + for (unsigned i = 0; i < coords_length; i++) + { + int v = coords[i]; + uint32_t varidx = varidx_map.map (i); + float delta = var_store.get_delta (varidx, coords, coords_length, var_store_cache); + v += roundf (delta); + v = hb_clamp (v, -(1<<14), +(1<<14)); + out.push (v); + } + for (unsigned i = 0; i < coords_length; i++) + coords[i] = out[i]; + + OT::VariationStore::destroy_cache (var_store_cache); +#endif } void unmap_coords (int *coords, unsigned int coords_length) const @@ -150,6 +359,39 @@ struct avar } } + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + unsigned retained_axis_count = c->plan->axes_index_map.get_population (); + if (!retained_axis_count) //all axes are pinned/dropped + return_trace (false); + + avar *out = c->serializer->allocate_min<avar> (); + if (unlikely (!out)) return_trace (false); + + out->version.major = 1; + out->version.minor = 0; + if (!c->serializer->check_assign (out->axisCount, retained_axis_count, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + const hb_map_t& axes_index_map = c->plan->axes_index_map; + const SegmentMaps *map = &firstAxisSegmentMaps; + unsigned count = axisCount; + for (unsigned int i = 0; i < count; i++) + { + if (axes_index_map.has (i)) + { + hb_tag_t *axis_tag; + if (!c->plan->axes_old_index_tag_map.has (i, &axis_tag)) + return_trace (false); + if (!map->subset (c, *axis_tag)) + return_trace (false); + } + map = &StructAfter<SegmentMaps> (*map); + } + return_trace (true); + } + protected: FixedVersion<>version; /* Version of the avar table * initially set to 0x00010000u */ |