From 3d7dea6dfdc9e75dcca100a79525aa3736dbe29c Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 11 Oct 2018 10:32:08 -0400
Subject: [PATCH] [trak] Handle nSizes=0 and 1

---
 src/hb-aat-layout-trak-table.hh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/hb-aat-layout-trak-table.hh b/src/hb-aat-layout-trak-table.hh
index 63dd890c5..368c55c12 100644
--- a/src/hb-aat-layout-trak-table.hh
+++ b/src/hb-aat-layout-trak-table.hh
@@ -93,7 +93,9 @@ struct TrackData
     Fixed fixed_size;
     fixed_size.set_float (csspx);
 
-    /* XXX Clean this up. Make it work with nSizes==1 and 0. */
+    /*
+     * Choose track.
+     */
 
     const TrackTableEntry *trackTableEntry = nullptr;
     unsigned int count = nTracks;
@@ -112,8 +114,15 @@ struct TrackData
     }
     if (!trackTableEntry) return 0.;
 
+    /*
+     * Choose size.
+     */
+
     unsigned int sizes = nSizes;
 
+    if (!sizes) return 0.;
+    if (sizes == 1) return trackTableEntry->get_value (base, 0, sizes);
+
     /* TODO bfind() */
     unsigned int size_index;
     UnsizedArrayOf<Fixed> size_table = base+sizeTable;