From 408eeac55cd5265114673d21c7a353a885f8825c Mon Sep 17 00:00:00 2001
From: sluicebox
Date: Tue, 26 Mar 2019 22:50:46 -0700
Subject: SCI: Synchronize QFG4 control panel audio settings

Fixes Audio button in control panel getting out of sync with
the message mode set by ScummVM.
---
 engines/sci/engine/guest_additions.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'engines/sci/engine/guest_additions.cpp')

diff --git a/engines/sci/engine/guest_additions.cpp b/engines/sci/engine/guest_additions.cpp
index afc87a5a8f..b8d6334c96 100644
--- a/engines/sci/engine/guest_additions.cpp
+++ b/engines/sci/engine/guest_additions.cpp
@@ -847,6 +847,18 @@ void GuestAdditions::syncMessageTypeFromScummVMUsingDefaultStrategy() const {
 		// is no equivalent option in the ScummVM GUI
 		_state->variables[VAR_GLOBAL][kGlobalVarGK1NarratorMode] = NULL_REG;
 	}
+
+	if (g_sci->getGameId() == GID_QFG4) {
+		// QFG4 uses a game flag to control the Audio button's state in the control panel.
+		//  This flag must be kept in sync with the standard global 90 speech bit.
+		uint flagNumber = 400;
+		uint globalNumber = kGlobalVarQFG4Flags + (flagNumber / 16);
+		if (value & kMessageTypeSpeech) {
+			_state->variables[VAR_GLOBAL][globalNumber] |= 0x8000;
+		} else {
+			_state->variables[VAR_GLOBAL][globalNumber] &= ~0x8000;
+		}
+	}
 }
 
 #ifdef ENABLE_SCI32
-- 
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