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[Device] Save a snap/revert

This commit is contained in:
Behdad Esfahbod 2022-12-03 12:50:32 -07:00
parent 93328cedfc
commit 44a5de3a97
1 changed files with 4 additions and 6 deletions
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10
src/hb-ot-layout-common.hh
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@ -3455,16 +3455,14 @@ struct VariationDevice
{
TRACE_SERIALIZE (this);
if (!layout_variation_idx_delta_map) return_trace (nullptr);
auto snap = c->snapshot ();
auto *out = c->embed (this);
if (unlikely (!out)) return_trace (nullptr);
hb_pair_t<unsigned, int> *v;
if (!layout_variation_idx_delta_map->has (varIdx, &v))
{
c->revert (snap);
return_trace (nullptr);
}
auto *out = c->embed (this);
if (unlikely (!out)) return_trace (nullptr);
unsigned new_idx = hb_first (*v);
out->varIdx = new_idx;
return_trace (out);