From 55d5ea666c25f75e9b1bc2eb43cfb104a16ebe04 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 15 Oct 2018 11:04:49 -0700
Subject: [PATCH] [kerx] Merge clusters in Ligature

---
 src/hb-aat-layout-morx-table.hh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/hb-aat-layout-morx-table.hh b/src/hb-aat-layout-morx-table.hh
index 544deddea..8446a862a 100644
--- a/src/hb-aat-layout-morx-table.hh
+++ b/src/hb-aat-layout-morx-table.hh
@@ -391,6 +391,12 @@ struct LigatureSubtable
 	unsigned int action_idx = entry->data.ligActionIndex;
 	unsigned int action;
 	unsigned int ligature_idx = 0;
+
+	if (unlikely (!match_length))
+	  return false;
+
+	buffer->merge_out_clusters (match_positions[0], buffer->out_len);
+
         do
 	{
 	  if (unlikely (!match_length))
@@ -428,7 +434,6 @@ struct LigatureSubtable
 	    buffer->skip_glyph ();
 	    end--;
 	  }
-	  /* TODO merge_clusters / unsafe_to_break */
 
 	  action_idx++;
 	}