[subset] Fix unecessary trailing 0 bytes left by ContextFormat2 pruning.
Uneeded rules where beind removed from the count by the bytes for them was being left in the font.
diff --git a/src/hb-ot-layout-gsubgpos.hh b/src/hb-ot-layout-gsubgpos.hh
index cd011b0..ec7c13c 100644
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@@ -2411,6 +2411,7 @@
const hb_map_t *lookup_map = c->table_tag == HB_OT_TAG_GSUB ? c->plan->gsub_lookups : c->plan->gpos_lookups;
bool ret = true;
int non_zero_index = -1, index = 0;
+ auto snapshot = c->serializer->snapshot();
for (const auto& _ : + hb_enumerate (ruleSet)
| hb_filter (klass_map, hb_first))
{
@@ -2422,8 +2423,10 @@
}
if (coverage_glyph_classes.has (_.first) &&
- o->serialize_subset (c, _.second, this, lookup_map, &klass_map))
+ o->serialize_subset (c, _.second, this, lookup_map, &klass_map)) {
non_zero_index = index;
+ snapshot = c->serializer->snapshot();
+ }
index++;
}
@@ -2437,6 +2440,7 @@
out->ruleSet.pop ();
index--;
}
+ c->serializer->revert (snapshot);
return_trace (bool (out->ruleSet));
}
