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[instancer] add subset () for cvar

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This commit is contained in:
Qunxin Liu 2023-06-20 12:37:05 -07:00
parent e39e02017e
commit f55619b836
1 changed files with 39 additions and 1 deletions
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40
src/hb-ot-var-cvar-table.hh
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@ -64,7 +64,7 @@ struct cvar
if (!TupleVariationData::get_tuple_iterator (var_data_bytes, axis_count, this,
shared_indices, &iterator))
return false;
return tupleVariationData.decompile_tuple_variations (point_count, is_gvar, iterator,
axes_old_index_tag_map,
shared_indices,
@ -125,6 +125,44 @@ struct cvar
return true;
}
bool serialize (hb_serialize_context_t *c,
TupleVariationData::tuple_variations_t& tuple_variations) const
{
TRACE_SERIALIZE (this);
if (unlikely (!c->embed (version))) return_trace (false);
return_trace (tupleVariationData.serialize (c, false, tuple_variations));
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
/* subset() for cvar is called by partial instancing only, we always pass
* through cvar table in other cases */
if (unlikely (!c->plan->normalized_coords ||
c->plan->pinned_at_default ||
c->plan->all_axes_pinned))
return_trace (false);
OT::TupleVariationData::tuple_variations_t tuple_variations;
unsigned axis_count = c->plan->axes_old_index_tag_map.get_population ();
const hb_tag_t cvt = HB_TAG('c','v','t',' ');
hb_blob_t *cvt_blob = hb_face_reference_table (c->plan->source, cvt);
unsigned point_count = hb_blob_get_length (cvt_blob) / FWORD::static_size;
if (!decompile_tuple_variations (axis_count, point_count, false,
&(c->plan->axes_old_index_tag_map),
tuple_variations))
return_trace (false);
tuple_variations.instantiate (c->plan->axes_location);
if (!tuple_variations.compile_bytes (c->plan->axes_index_map, c->plan->axes_old_index_tag_map))
return_trace (false);
return_trace (serialize (c->serializer, tuple_variations));
}
static bool add_cvt_and_apply_deltas (hb_subset_plan_t *plan,
const TupleVariationData *tuple_var_data,