diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh | 98 |
1 files changed, 89 insertions, 9 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh b/thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh index b9b49f2287..af23862870 100644 --- a/thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh +++ b/thirdparty/harfbuzz/src/hb-ot-var-fvar-table.hh @@ -44,9 +44,47 @@ 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 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, float> *axes_location = c->plan->user_axes_location; + for (unsigned i = 0 ; i < axis_count; i++) + { + unsigned *axis_tag; + // only keep instances whose coordinates == pinned axis location + if (!c->plan->axes_old_index_tag_map->has (i, &axis_tag)) continue; + + if (axes_location->has (*axis_tag) && + fabsf (axes_location->get (*axis_tag) - coords[i].to_float ()) > 0.001f) + return_trace (false); + + if (!c->plan->axes_index_map->has (i)) + 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); @@ -58,7 +96,7 @@ 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 @@ -151,9 +189,9 @@ struct AxisRecord 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 @@ -268,7 +306,7 @@ struct fvar if (coords_length && *coords_length) { - hb_array_t<const HBFixed> instanceCoords = instance->get_coordinates (axisCount) + 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 (); @@ -301,7 +339,7 @@ struct fvar if (hb_any (+ hb_zip (instance->get_coordinates (axisCount), hb_range ((unsigned)axisCount)) | hb_filter (pinned_axes, hb_second) - | hb_map ([&] (const hb_pair_t<const HBFixed&, unsigned>& _) + | hb_map ([&] (const hb_pair_t<const F16DOT16&, unsigned>& _) { hb_tag_t axis_tag = pinned_axes.get (_.second); float location = user_axes_location->get (axis_tag); @@ -321,6 +359,48 @@ struct fvar } } + 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 (!c->serializer->embed (axes_records[i]))) + return_trace (false); + } + + if (!c->serializer->check_assign (out->firstAxis, get_size (), HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + 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); + } + return_trace (true); + } + public: hb_array_t<const AxisRecord> get_axes () const { return hb_array (&(this+firstAxis), axisCount); } @@ -346,8 +426,8 @@ 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); |