From b4f74b9b5e3b5eebcd695f8c07dd2d78e6a53a61 Mon Sep 17 00:00:00 2001
From: Strangerke
Date: Wed, 20 Aug 2014 01:46:46 +0200
Subject: ACCESS: Use a variable delay of up to 20ms instead of a fix 50ms

---
 engines/access/access.cpp | 13 ++++++++++++-
 engines/access/access.h   |  2 ++
 engines/access/room.cpp   |  4 ----
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/engines/access/access.cpp b/engines/access/access.cpp
index ab58f8effc..71271230dd 100644
--- a/engines/access/access.cpp
+++ b/engines/access/access.cpp
@@ -99,6 +99,8 @@ AccessEngine::AccessEngine(OSystem *syst, const AccessGameDescription *gameDesc)
 	_rKeyFlag = 0;
 	_mapOffset = 0;
 	_screenVirtX = 0;
+	_lastTime = g_system->getMillis();
+	_curTime = 0;
 }
 
 AccessEngine::~AccessEngine() {
@@ -171,7 +173,16 @@ void AccessEngine::dummyLoop() {
 	// Dummy game loop
 	while (!shouldQuit()) {
 		_events->pollEvents();
-		g_system->delayMillis(50);
+
+		_curTime = g_system->getMillis();
+		// Process machine once every tick
+		while (_curTime - _lastTime < 20) {
+			g_system->delayMillis(5);
+			_curTime = g_system->getMillis();
+		}
+
+		_lastTime = _curTime;
+
 		g_system->updateScreen();
 
 		if (_events->_leftButton) {
diff --git a/engines/access/access.h b/engines/access/access.h
index 88b6c837a5..f775310805 100644
--- a/engines/access/access.h
+++ b/engines/access/access.h
@@ -73,6 +73,8 @@ struct AccessGameDescription;
 
 class AccessEngine : public Engine {
 private:
+	uint32 _lastTime, _curTime;
+
 	/**
 	 * Handles basic initialisation
 	 */
diff --git a/engines/access/room.cpp b/engines/access/room.cpp
index 5e3a4d743d..e40c6b7096 100644
--- a/engines/access/room.cpp
+++ b/engines/access/room.cpp
@@ -79,10 +79,6 @@ void Room::doRoom() {
 				_vm->_screen->fadeIn();
 			}
 
-			// TODO: Game loop doesn't seem to have any delay. For now,
-			// introduce a slight delay here
-			_vm->_events->delay(50);
-
 			// Handle any events
 			_vm->_events->pollEvents();
 
-- 
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