Pause/exit game dialog problem with planets fixed, GraphicsSem usage

reverted back in RotatePlanet, from PhracturedBlue


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@423 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/sc2code/confirm.c

@@ -61,9 +61,12 @@ ConfirmExit (void)
 		F = CaptureDrawable (LoadDisplayPixmap (&r, (FRAME)0));
 		DrawStamp (&s);
 
-		ClearSemaphore (GraphicsSem);
+		// Releasing the Semaphore lets the rotate_planet_task
+		// draw a frame.  PauseRotate can still allow one more frame
+		// to be drawn, so it is safer to just not release the Semaphore
+		//ClearSemaphore (GraphicsSem);
 		FlushGraphics ();
-		SetSemaphore (GraphicsSem);
+		//SetSemaphore (GraphicsSem);
 
 		{
 			INPUT_STATE PressState;

sc2/src/sc2code/planets/pl_stuff.c

@@ -115,7 +115,19 @@ RotatePlanet (int x, int da, int dx, int dy, int zoom)
 			zoom_from = 0;
 		}
 	}
-	SetSemaphore (GraphicsSem);
+
+	//SetSemaphore (GraphicsSem);
+
+	// PauseRotate needs to be checked twice.   It is first
+	// checked at the rotate_planet_task function to bypass
+	// rendering the planet (and thus slowinng down other
+	// parts of te code.  It is checked here because it is possile
+	// that PauseRotate was set between then and now, and we don't
+	// want too push anything onto the DrawQueue in that case.
+	// If the setSemaphore is moved before the RenderLevelMasks call,
+	// one of the two PauseRotate checks can be removed.
+	//if (((PSOLARSYS_STATE volatile)pSolarSysState)->PauseRotate !=1)
+	{
 		OldContext = SetContext (SpaceContext);
 		BatchGraphics ();
 		if (rp)
@@ -129,7 +141,8 @@ RotatePlanet (int x, int da, int dx, int dy, int zoom)
 		}
 		UnbatchGraphics ();
 		SetContext (OldContext);
-	ClearSemaphore (GraphicsSem);
+	}
+	//ClearSemaphore (GraphicsSem);
 	return (zoom);
 }
 

sc2/src/sc2code/planets/plangen.c

@@ -1300,6 +1300,14 @@ rotate_planet_task (void *data)
 		view_index = MAP_WIDTH;
 		do
 		{
+			// This SetSemaphore was placed before the RotatePlanet call
+			// To prevent the thread from being interrupted by the flash
+			// task while computing the Planet Frame.  This should help
+			// to smooth out the planet rotation animation.
+			// The PauseRotate needs to be placed after the SetSemaphore,
+			// to gaurantee that PauseRotate doesn't change while waiting
+			// to aquire the GraphicsSem
+			SetSemaphore (GraphicsSem);
 			if (((PSOLARSYS_STATE volatile)pSS)->PauseRotate !=1
 //			if (((PSOLARSYS_STATE volatile)pSS)->MenuState.Initialized <= 3
 					&& !(GLOBAL (CurrentActivity) & CHECK_ABORT))
@@ -1319,7 +1327,7 @@ rotate_planet_task (void *data)
 				}
 				x += i;
 			}
-
+			ClearSemaphore (GraphicsSem);
 			SleepThreadUntil (TimeIn + (ONE_SECOND * ROTATION_TIME) / (MAP_WIDTH));
 //			SleepThreadUntil (TimeIn + (ONE_SECOND * 5 / (MAP_WIDTH-32)));
 			TimeIn = GetTimeCounter ();

sc2/src/sc2code/utils.c

@@ -174,9 +174,12 @@ PauseGame (void)
 	F = CaptureDrawable (LoadDisplayPixmap (&r, (FRAME)0));
 	DrawStamp (&s);
 
-	ClearSemaphore (GraphicsSem);
+	// Releasing the Semaphore lets the rotate_planet_task
+	// draw a frame.  PauseRotate can still allow one more frame
+	// to be drawn, so it is safer to just not release the Semaphore
+	//ClearSemaphore (GraphicsSem);
 	FlushGraphics ();
-	SetSemaphore (GraphicsSem);
+	//SetSemaphore (GraphicsSem);
 
 	{
 		BYTE scan;