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 | 85 |
1 files changed, 80 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..3449b30499 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 @@ -62,8 +86,8 @@ 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. */ @@ -106,12 +130,24 @@ 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) && + (version.major == 1 +#ifndef HB_NO_AVAR2 + || version.major == 2 +#endif + ) && + c->check_struct (this))) return_trace (false); const SegmentMaps *map = &firstAxisSegmentMaps; @@ -123,6 +159,15 @@ struct avar map = &StructAfter<SegmentMaps> (*map); } +#ifndef HB_NO_AVAR2 + if (version.major < 2) + return_trace (true); + + const auto &v2 = * (const avarV2Tail *) map; + if (unlikely (!v2.sanitize (c, this))) + return_trace (false); +#endif + return_trace (true); } @@ -136,6 +181,36 @@ struct avar coords[i] = map->map (coords[i]); map = &StructAfter<SegmentMaps> (*map); } + +#ifndef HB_NO_AVAR2 + if (version.major < 2) + return; + + 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 |