iOS setContinuousRendering() potential fix

gistfile1.diff

diff --git a/backends/gdx-backend-robovm/src/com/badlogic/gdx/backends/iosrobovm/IOSGraphics.java b/backends/gdx-backend-robovm/src/com/badlogic/gdx/backends/iosrobovm/IOSGraphics.java
index 330b7fb..fe9bd53 100644
--- a/backends/gdx-backend-robovm/src/com/badlogic/gdx/backends/iosrobovm/IOSGraphics.java
+++ b/backends/gdx-backend-robovm/src/com/badlogic/gdx/backends/iosrobovm/IOSGraphics.java
@@ -65,7 +65,8 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
                @Override
                public void viewWillAppear (boolean arg0) {
                        super.viewWillAppear(arg0);
-                       setPaused(!graphics.isContinuous);
+                       // start GLKViewController even though we may only draw a single frame
+                       viewController.setPaused(false);
                }
 
                @Override
@@ -151,9 +152,10 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
        private float ppcY = 0;
        private float density = 1;
 
-       volatile boolean paused;
+       volatile boolean appPaused;
        private long frameId = -1;
        private boolean isContinuous = true;
+       private boolean isFrameRequested = true;
 
        IOSApplicationConfiguration config;
        EAGLContext context;
@@ -262,12 +264,12 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
                lastFrameTime = System.nanoTime();
                framesStart = lastFrameTime;
 
-               paused = false;
+               appPaused = false;
        }
 
        public void resume () {
-               if (!paused) return;
-               paused = false;
+               if (!appPaused) return;
+               appPaused = false;
 
                Array<LifecycleListener> listeners = app.lifecycleListeners;
                synchronized (listeners) {
@@ -279,8 +281,8 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
        }
 
        public void pause () {
-               if (paused) return;
-               paused = true;
+               if (appPaused) return;
+               appPaused = true;
 
                Array<LifecycleListener> listeners = app.lifecycleListeners;
                synchronized (listeners) {
@@ -306,7 +308,7 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
                        app.listener.resize(width, height);
                        created = true;
                }
-               if (paused) {
+               if (appPaused) {
                        return;
                }
 
@@ -334,17 +336,17 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
        public void update (GLKViewController controller) {
                makeCurrent();
                app.processRunnables();
+               // pause the GLKViewController render loop if we are no longer continuous
+               // and if we haven't requested a frame in the last loop iteration
+               if (!isContinuous && !isFrameRequested)
+               {
+                       viewController.setPaused(true);
+               }
+               isFrameRequested = false;
        }
 
        @Override
        public void willPause (GLKViewController controller, boolean pause) {
-               if (pause) {
-                       if (paused) return;
-                       pause();
-               } else {
-                       if (!paused) return;
-                       resume();
-               }
        }
 
        @Override
@@ -464,9 +466,6 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
        @Override
        public void setContinuousRendering (boolean isContinuous) {
                this.isContinuous = isContinuous;
-               viewController.setPaused(!isContinuous);
-               viewController.setResumeOnDidBecomeActive(isContinuous);
-               view.setEnableSetNeedsDisplay(!isContinuous);
        }
 
        @Override
@@ -476,7 +475,9 @@ public class IOSGraphics extends NSObject implements Graphics, GLKViewDelegate,
 
        @Override
        public void requestRendering () {
-               view.setNeedsDisplay();
+               isFrameRequested = true;
+               // start the GLKViewController render loop
+               viewController.setPaused(false);
        }
 
        @Override