diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh | 232 |
1 files changed, 203 insertions, 29 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh index 05f289db26..07d7586baa 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-var-fvar-table.hh @@ -39,18 +39,99 @@ namespace OT { +static bool axis_coord_pinned_or_within_axis_range (const hb_array_t<const F16DOT16> coords, + unsigned axis_index, + Triple axis_limit) +{ + float axis_coord = coords[axis_index].to_float (); + if (axis_limit.is_point ()) + { + if (axis_limit.minimum != axis_coord) + return false; + } + else + { + if (axis_coord < axis_limit.minimum || + axis_coord > axis_limit.maximum) + return false; + } + return true; +} struct InstanceRecord { friend struct fvar; - hb_array_t<const HBFixed> get_coordinates (unsigned int axis_count) const + hb_array_t<const F16DOT16> get_coordinates (unsigned int axis_count) const { return coordinatesZ.as_array (axis_count); } + bool keep_instance (unsigned axis_count, + const hb_map_t *axes_index_tag_map, + const hb_hashmap_t<hb_tag_t, Triple> *axes_location) const + { + if (axes_location->is_empty ()) return true; + const hb_array_t<const F16DOT16> coords = get_coordinates (axis_count); + for (unsigned i = 0 ; i < axis_count; i++) + { + uint32_t *axis_tag; + if (!axes_index_tag_map->has (i, &axis_tag)) + return false; + if (!axes_location->has (*axis_tag)) + continue; + + Triple axis_limit = axes_location->get (*axis_tag); + if (!axis_coord_pinned_or_within_axis_range (coords, i, axis_limit)) + return false; + } + return true; + } + + bool subset (hb_subset_context_t *c, + unsigned axis_count, + bool has_postscript_nameid) const + { + TRACE_SUBSET (this); + if (unlikely (!c->serializer->embed (subfamilyNameID))) return_trace (false); + if (unlikely (!c->serializer->embed (flags))) return_trace (false); + + const hb_array_t<const F16DOT16> coords = get_coordinates (axis_count); + const hb_hashmap_t<hb_tag_t, Triple> *axes_location = &c->plan->user_axes_location; + for (unsigned i = 0 ; i < axis_count; i++) + { + uint32_t *axis_tag; + Triple *axis_limit; + // only keep instances whose coordinates == pinned axis location + if (!c->plan->axes_old_index_tag_map.has (i, &axis_tag)) return_trace (false); + if (axes_location->has (*axis_tag, &axis_limit)) + { + if (!axis_coord_pinned_or_within_axis_range (coords, i, *axis_limit)) + return_trace (false); + + //skip pinned axis + if (axis_limit->is_point ()) + continue; + } + + if (!c->serializer->embed (coords[i])) + return_trace (false); + } + + if (has_postscript_nameid) + { + NameID name_id; + name_id = StructAfter<NameID> (coords); + if (!c->serializer->embed (name_id)) + return_trace (false); + } + + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c, unsigned int axis_count) const { TRACE_SANITIZE (this); return_trace (c->check_struct (this) && + hb_barrier () && c->check_array (coordinatesZ.arrayZ, axis_count)); } @@ -58,7 +139,7 @@ struct InstanceRecord NameID subfamilyNameID;/* The name ID for entries in the 'name' table * that provide subfamily names for this instance. */ HBUINT16 flags; /* Reserved for future use — set to 0. */ - UnsizedArrayOf<HBFixed> + UnsizedArrayOf<F16DOT16> coordinatesZ; /* The coordinates array for this instance. */ //NameID postScriptNameIDX;/*Optional. The name ID for entries in the 'name' // * table that provide PostScript names for this @@ -96,6 +177,8 @@ struct AxisRecord info->reserved = 0; } + hb_tag_t get_axis_tag () const { return axisTag; } + int normalize_axis_value (float v) const { float min_value, default_value, max_value; @@ -133,21 +216,49 @@ struct AxisRecord return_trace (c->check_struct (this)); } - protected: void get_coordinates (float &min, float &default_, float &max) const { - default_ = defaultValue / 65536.f; + default_ = defaultValue.to_float (); /* Ensure order, to simplify client math. */ - min = hb_min (default_, minValue / 65536.f); - max = hb_max (default_, maxValue / 65536.f); + min = hb_min (default_, minValue.to_float ()); + max = hb_max (default_, maxValue.to_float ()); + } + + float get_default () const + { + return defaultValue.to_float (); + } + + TripleDistances get_triple_distances () const + { + float min, default_, max; + get_coordinates (min, default_, max); + return TripleDistances (min, default_, max); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (false); + + const hb_hashmap_t<hb_tag_t, Triple>& user_axes_location = c->plan->user_axes_location; + Triple *axis_limit; + if (user_axes_location.has (axisTag, &axis_limit)) + { + out->minValue.set_float (axis_limit->minimum); + out->defaultValue.set_float (axis_limit->middle); + out->maxValue.set_float (axis_limit->maximum); + } + return_trace (true); } public: Tag axisTag; /* Tag identifying the design variation for the axis. */ protected: - HBFixed minValue; /* The minimum coordinate value for the axis. */ - HBFixed defaultValue; /* The default coordinate value for the axis. */ - HBFixed maxValue; /* The maximum coordinate value for the axis. */ + F16DOT16 minValue; /* The minimum coordinate value for the axis. */ + F16DOT16 defaultValue; /* The default coordinate value for the axis. */ + F16DOT16 maxValue; /* The maximum coordinate value for the axis. */ public: HBUINT16 flags; /* Axis flags. */ NameID axisNameID; /* The name ID for entries in the 'name' table that @@ -167,12 +278,15 @@ struct fvar { TRACE_SANITIZE (this); return_trace (version.sanitize (c) && + hb_barrier () && likely (version.major == 1) && c->check_struct (this) && + hb_barrier () && axisSize == 20 && /* Assumed in our code. */ instanceSize >= axisCount * 4 + 4 && get_axes ().sanitize (c) && - c->check_range (get_instance (0), instanceCount, instanceSize)); + c->check_range (&StructAfter<InstanceRecord> (get_axes ()), + instanceCount, instanceSize)); } unsigned int get_axis_count () const { return axisCount; } @@ -213,7 +327,7 @@ struct fvar if (!axis_index) axis_index = &i; *axis_index = HB_OT_VAR_NO_AXIS_INDEX; auto axes = get_axes (); - return axes.lfind (tag, axis_index) && (axes[*axis_index].get_axis_deprecated (info), true); + return axes.lfind (tag, axis_index) && ((void) axes[*axis_index].get_axis_deprecated (info), true); } #endif bool @@ -221,7 +335,7 @@ struct fvar { unsigned i; auto axes = get_axes (); - return axes.lfind (tag, &i) && (axes[i].get_axis_info (i, info), true); + return axes.lfind (tag, &i) && ((void) axes[i].get_axis_info (i, info), true); } int normalize_axis_value (unsigned int axis_index, float v) const @@ -262,32 +376,92 @@ struct fvar if (coords_length && *coords_length) { - hb_array_t<const HBFixed> instanceCoords = instance->get_coordinates (axisCount) - .sub_array (0, *coords_length); + hb_array_t<const F16DOT16> instanceCoords = instance->get_coordinates (axisCount) + .sub_array (0, coords_length); for (unsigned int i = 0; i < instanceCoords.length; i++) coords[i] = instanceCoords.arrayZ[i].to_float (); } return axisCount; } - void collect_name_ids (hb_set_t *nameids) const + void collect_name_ids (hb_hashmap_t<hb_tag_t, Triple> *user_axes_location, + hb_map_t *axes_old_index_tag_map, + hb_set_t *nameids /* IN/OUT */) const { if (!has_data ()) return; - + get_axes () - | hb_map (&AxisRecord::get_name_id) - | hb_sink (nameids) - ; + auto axis_records = get_axes (); + for (unsigned i = 0 ; i < (unsigned)axisCount; i++) + { + hb_tag_t axis_tag = axis_records[i].get_axis_tag (); + if (user_axes_location->has (axis_tag) && + user_axes_location->get (axis_tag).is_point ()) + continue; + + nameids->add (axis_records[i].get_name_id ()); + } + + for (unsigned i = 0 ; i < (unsigned)instanceCount; i++) + { + const InstanceRecord *instance = get_instance (i); + + if (!instance->keep_instance (axisCount, axes_old_index_tag_map, user_axes_location)) + continue; + + nameids->add (instance->subfamilyNameID); + + if (instanceSize >= axisCount * 4 + 6) + { + unsigned post_script_name_id = StructAfter<NameID> (instance->get_coordinates (axisCount)); + if (post_script_name_id != HB_OT_NAME_ID_INVALID) nameids->add (post_script_name_id); + } + } + } + + 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 + return_trace (false); + + fvar *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (false); + + if (!c->serializer->check_assign (out->axisCount, retained_axis_count, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + bool has_postscript_nameid = false; + if (instanceSize >= axisCount * 4 + 6) + has_postscript_nameid = true; + + if (!c->serializer->check_assign (out->instanceSize, retained_axis_count * 4 + (has_postscript_nameid ? 6 : 4), + HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + auto axes_records = get_axes (); + for (unsigned i = 0 ; i < (unsigned)axisCount; i++) + { + if (!c->plan->axes_index_map.has (i)) continue; + if (unlikely (!axes_records[i].subset (c))) + return_trace (false); + } - + hb_range ((unsigned) instanceCount) - | hb_map ([this] (const unsigned _) { return get_instance_subfamily_name_id (_); }) - | hb_sink (nameids) - ; + if (!c->serializer->check_assign (out->firstAxis, get_size (), HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + unsigned num_retained_instances = 0; + for (unsigned i = 0 ; i < (unsigned)instanceCount; i++) + { + const InstanceRecord *instance = get_instance (i); + auto snap = c->serializer->snapshot (); + if (!instance->subset (c, axisCount, has_postscript_nameid)) + c->serializer->revert (snap); + else + num_retained_instances++; + } - + hb_range ((unsigned) instanceCount) - | hb_map ([this] (const unsigned _) { return get_instance_postscript_name_id (_); }) - | hb_sink (nameids) - ; + return_trace (c->serializer->check_assign (out->instanceCount, num_retained_instances, HB_SERIALIZE_ERROR_INT_OVERFLOW)); } public: @@ -315,8 +489,8 @@ struct fvar HBUINT16 instanceCount; /* The number of named instances defined in the font * (the number of records in the instances array). */ HBUINT16 instanceSize; /* The size in bytes of each InstanceRecord — set - * to either axisCount * sizeof(HBFixed) + 4, or to - * axisCount * sizeof(HBFixed) + 6. */ + * to either axisCount * sizeof(F16DOT16) + 4, or to + * axisCount * sizeof(F16DOT16) + 6. */ public: DEFINE_SIZE_STATIC (16); 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