OSX std::chrono

osx_chrono.diff

diff --git a/src/video/cocoa/event.mm b/src/video/cocoa/event.mm
index 8a43945f5..a455ccb76 100644
--- a/src/video/cocoa/event.mm
+++ b/src/video/cocoa/event.mm
@@ -619,10 +619,6 @@ static bool QZ_PollEvent()
 
 void VideoDriver_Cocoa::GameLoop()
 {
-	uint32 cur_ticks = GetTick();
-	uint32 last_cur_ticks = cur_ticks;
-	uint32 next_tick = cur_ticks + MILLISECONDS_PER_TICK;
-
 #ifdef _DEBUG
 	uint32 et0 = GetTick();
 	uint32 st = 0;
@@ -646,8 +642,11 @@ void VideoDriver_Cocoa::GameLoop()
 	QZ_CheckPaletteAnim();
 	_cocoa_subdriver->Draw(true);
 
+	auto cur_ticks = std::chrono::steady_clock::now();
+	auto last_cur_ticks = cur_ticks;
+	auto next_tick = cur_ticks + std::chrono::milliseconds(MILLISECONDS_PER_TICK);
+
 	for (;;) {
-		uint32 prev_cur_ticks = cur_ticks; // to check for wrapping
 		InteractiveRandom(); // randomness
 
 		while (QZ_PollEvent()) {}
@@ -669,11 +668,11 @@ void VideoDriver_Cocoa::GameLoop()
 			_fast_forward = 0;
 		}
 
-		cur_ticks = GetTick();
-		if (cur_ticks >= next_tick || (_fast_forward && !_pause_mode) || cur_ticks < prev_cur_ticks) {
-			_realtime_tick += cur_ticks - last_cur_ticks;
+		cur_ticks = std::chrono::steady_clock::now();
+		if (cur_ticks >= next_tick || (_fast_forward && !_pause_mode)) {
+			_realtime_tick += std::chrono::duration_cast<std::chrono::milliseconds>(cur_ticks - last_cur_ticks).count();
 			last_cur_ticks = cur_ticks;
-			next_tick = cur_ticks + MILLISECONDS_PER_TICK;
+			next_tick = cur_ticks + std::chrono::milliseconds(MILLISECONDS_PER_TICK);
 
 			bool old_ctrl_pressed = _ctrl_pressed;
 

sec.diff

diff --git a/src/video/cocoa/event.mm b/src/video/cocoa/event.mm
index 8a43945f5..0c71adb9b 100644
--- a/src/video/cocoa/event.mm
+++ b/src/video/cocoa/event.mm
@@ -686,7 +685,7 @@ void VideoDriver_Cocoa::GameLoop()
 
 			UpdateWindows();
 			QZ_CheckPaletteAnim();
-			_cocoa_subdriver->Draw();
+			_cocoa_subdriver->Draw(_fullscreen);
 		} else {
 #ifdef _DEBUG
 			uint32 st0 = GetTick();