[subset-plan] Simplify axes_index_map allocation

src/hb-ot-layout-common.hh

@@ -2838,7 +2838,7 @@ struct ConditionFormat1
     auto *out = c->serializer->embed (this);
     if (unlikely (!out)) return_trace (false);
 
-    const hb_map_t *index_map = c->plan->axes_index_map;
+    const hb_map_t *index_map = &c->plan->axes_index_map;
     if (index_map->is_empty ()) return_trace (true);
 
     if (!index_map->has (axisIndex))

src/hb-ot-var-fvar-table.hh

@@ -67,7 +67,7 @@ struct InstanceRecord
           fabsf (axes_location->get (*axis_tag) - coords[i].to_float ()) > 0.001f)
         return_trace (false);
 
-      if (!c->plan->axes_index_map->has (i))
+      if (!c->plan->axes_index_map.has (i))
         continue;
 
       if (!c->serializer->embed (coords[i]))
@@ -362,7 +362,7 @@ struct fvar
   bool subset (hb_subset_context_t *c) const
   {
     TRACE_SUBSET (this);
-    unsigned retained_axis_count = c->plan->axes_index_map->get_population ();
+    unsigned retained_axis_count = c->plan->axes_index_map.get_population ();
     if (!retained_axis_count) //all axes are pinned
       return_trace (false);
 
@@ -383,7 +383,7 @@ struct fvar
     auto axes_records = get_axes ();
     for (unsigned i = 0 ; i < (unsigned)axisCount; i++)
     {
-      if (!c->plan->axes_index_map->has (i)) continue;
+      if (!c->plan->axes_index_map.has (i)) continue;
       if (unlikely (!c->serializer->embed (axes_records[i])))
         return_trace (false);
     }

src/hb-subset-plan.cc

@@ -787,7 +787,7 @@ _normalize_axes_location (hb_face_t *face, hb_subset_plan_t *plan)
     if (!plan->user_axes_location->has (axis_tag))
     {
       axis_not_pinned = true;
-      plan->axes_index_map->set (old_axis_idx, new_axis_idx);
+      plan->axes_index_map.set (old_axis_idx, new_axis_idx);
       new_axis_idx++;
     }
     else
@@ -860,7 +860,6 @@ hb_subset_plan_create_or_fail (hb_face_t	 *face,
   plan->check_success (plan->user_axes_location = hb_hashmap_create<hb_tag_t, float> ());
   if (plan->user_axes_location && input->axes_location)
       *plan->user_axes_location = *input->axes_location;
-  plan->check_success (plan->axes_index_map = hb_map_create ());
   plan->all_axes_pinned = false;
   plan->pinned_at_default = true;
 

src/hb-subset-plan.hh

@@ -55,7 +55,6 @@ struct hb_subset_plan_t
     hb_map_destroy (glyph_map);
     hb_map_destroy (reverse_glyph_map);
 
-    hb_map_destroy (axes_index_map);
     hb_hashmap_destroy (user_axes_location);
 
 #ifdef HB_EXPERIMENTAL_API
@@ -159,7 +158,7 @@ struct hb_subset_plan_t
   //user specified axes location map
   hb_hashmap_t<hb_tag_t, float> *user_axes_location;
   //retained old axis index -> new axis index mapping in fvar axis array
-  hb_map_t *axes_index_map;
+  hb_map_t axes_index_map;
   //axis_index->axis_tag mapping in fvar axis array
   hb_map_t axes_old_index_tag_map;
   bool all_axes_pinned;