From 9ccace8f0ddb2819d1d5461efbebaa0ffe9d594e Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 30 Jul 2018 15:58:29 +0200
Subject: Amend VST "MasterUpdateDisplay", allow UI(s) to idle-update.

---
 libs/ardour/session_vst.cc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libs/ardour')

diff --git a/libs/ardour/session_vst.cc b/libs/ardour/session_vst.cc
index 3252698bf4..2720334ad5 100644
--- a/libs/ardour/session_vst.cc
+++ b/libs/ardour/session_vst.cc
@@ -496,6 +496,10 @@ intptr_t Session::vst_callback (
 		if (session) {
 			session->set_dirty ();
 		}
+		/* allow plugin UI to update */
+#ifdef WINDOWS_VST_SUPPORT
+		fst_audio_master_idle();
+#endif
 		return 0;
 
 	case audioMasterBeginEdit:
-- 
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