From d63bfbcae4a31560468e8800fe8381fda3b9d2ce Mon Sep 17 00:00:00 2001
From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Date: Fri, 21 Jun 2019 09:28:50 +0900
Subject: * src/xterm.c (x_update_end) [USE_CAIRO]: Flush non-double-buffered
 surface.

---
 src/xterm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/xterm.c b/src/xterm.c
index 38bf0a224d4..1acff2af0da 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -1240,6 +1240,15 @@ x_update_end (struct frame *f)
   /* Mouse highlight may be displayed again.  */
   MOUSE_HL_INFO (f)->mouse_face_defer = false;
 
+#ifdef USE_CAIRO
+  if (!FRAME_X_DOUBLE_BUFFERED_P (f) && FRAME_CR_CONTEXT (f))
+    {
+      block_input ();
+      cairo_surface_flush (cairo_get_target (FRAME_CR_CONTEXT (f)));
+      unblock_input ();
+    }
+#endif
+
 #ifndef XFlush
   block_input ();
   XFlush (FRAME_X_DISPLAY (f));
-- 
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