From fb26a42aad0ec1c5b6d1fb141446ec158995995d Mon Sep 17 00:00:00 2001
From: Bastien Bouclet
Date: Thu, 10 Aug 2017 20:51:27 +0200
Subject: MOHAWK: Myst: Restore the backbuffer after toggling off fireplace
 buttons

Fixes #10064
---
 engines/mohawk/myst_stacks/myst.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'engines/mohawk')

diff --git a/engines/mohawk/myst_stacks/myst.cpp b/engines/mohawk/myst_stacks/myst.cpp
index 1ee8420472..dbc4ff55b8 100644
--- a/engines/mohawk/myst_stacks/myst.cpp
+++ b/engines/mohawk/myst_stacks/myst.cpp
@@ -843,6 +843,7 @@ void Myst::o_fireplaceToggleButton(uint16 var, const ArgumentsArray &args) {
 	// Used on Myst Card 4162 (Fireplace Grid)
 	uint16 bitmask = args[0];
 	uint16 line = _fireplaceLines[var - 17];
+	Common::Rect buttonRect = getInvokingResource<MystArea>()->getRect();
 
 	// The animations are too slow when playing each animation image at 60fps.
 	// Only play every second image.
@@ -850,14 +851,15 @@ void Myst::o_fireplaceToggleButton(uint16 var, const ArgumentsArray &args) {
 	if (line & bitmask) {
 		// Unset button
 		for (uint i = 4795; i >= 4779; i -= 2) {
-			_vm->_gfx->copyImageToScreen(i, getInvokingResource<MystArea>()->getRect());
+			_vm->_gfx->copyImageToScreen(i, buttonRect);
 			_vm->doFrame();
 		}
+		_vm->_gfx->copyBackBufferToScreen(buttonRect);
 		_fireplaceLines[var - 17] &= ~bitmask;
 	} else {
 		// Set button
 		for (uint i = 4779; i <= 4795; i += 2) {
-			_vm->_gfx->copyImageToScreen(i, getInvokingResource<MystArea>()->getRect());
+			_vm->_gfx->copyImageToScreen(i, buttonRect);
 			_vm->doFrame();
 		}
 		_fireplaceLines[var - 17] |= bitmask;
-- 
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