From 75ca78a6bbbfda8d8fcb363ef71d3012949aee5e Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 27 Jun 2022 11:55:37 -0600
Subject: [PATCH] [glyf] Optimize hb_contour_points_t::extend

---
 src/hb-ot-var-gvar-table.hh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/hb-ot-var-gvar-table.hh b/src/hb-ot-var-gvar-table.hh
index d91221b5c..5454bc488 100644
--- a/src/hb-ot-var-gvar-table.hh
+++ b/src/hb-ot-var-gvar-table.hh
@@ -56,9 +56,12 @@ struct contour_point_vector_t : hb_vector_t<contour_point_t>
   void extend (const hb_array_t<contour_point_t> &a)
   {
     unsigned int old_len = length;
-    resize (old_len + a.length);
-    for (unsigned int i = 0; i < a.length; i++)
-      (*this)[old_len + i] = a[i];
+    if (unlikely (!resize (old_len + a.length)))
+      return;
+    auto arrayZ = this->arrayZ + old_len;
+    unsigned count = a.length;
+    for (unsigned int i = 0; i < count; i++)
+      arrayZ[i] = a.arrayZ[i];
   }
 
   void transform (const float (&matrix)[4])