iOS: Initial working commit supporting iOS (ipad pro 11)

using our OpenJFK 9 x86_64 and arm64 build.

Test demo class is 'com.jogamp.opengl.demos.ios.Hello',
residing in the new demo folder 'src/demos/com/jogamp/opengl/demos/ios/Hello.java'.

This commit does not yet include a working NEWT
specialization for iOS, but it shall followup soon.

Instead this commit demonstrates JOGL operating on
native UIWindow, UIView and CAEAGLLayer as provided by
Nativewindow's IOSUtil.

Test Video https://www.youtube.com/watch?v=Z4lUQNFTGMI

+++

Notable bug: The FBO used and sharing the COLORBUFFER RENDERBUFFER
memory resources with CAEAGLLayer to be displayed in the UIView
seemingly cannot handle GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24
or GL_DEPTH_COMPONENT32 depth buffer - none at all (Device + Simulation).

Therefor the default demo GLEventListener chosen here
don't require a depth buffer ;-)

This issue can hopefully be mitigated with other means
than using a flat FBO sink similar to FBO multisampling.

11 files changed, 1524 insertions, 8 deletions

diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java b/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
index 323bc8c86..8e00d318c 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
@@ -52,6 +52,7 @@ import jogamp.nativewindow.NativeWindowFactoryImpl;
 import jogamp.nativewindow.ToolkitProperties;
 import jogamp.nativewindow.ResourceToolkitLock;
 import jogamp.nativewindow.WrappedWindow;
+import jogamp.nativewindow.ios.IOSUtil;
 import jogamp.nativewindow.macosx.OSXUtil;
 import jogamp.nativewindow.windows.GDIUtil;
 import jogamp.nativewindow.x11.X11Lib;
@@ -65,6 +66,7 @@ import com.jogamp.nativewindow.UpstreamWindowHookMutableSizePos;
 import com.jogamp.nativewindow.awt.AWTGraphicsDevice;
 import com.jogamp.nativewindow.awt.AWTGraphicsScreen;
 import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+import com.jogamp.nativewindow.ios.IOSGraphicsDevice;
 import com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice;
 import com.jogamp.nativewindow.windows.WindowsGraphicsDevice;
 import com.jogamp.nativewindow.x11.X11GraphicsDevice;
@@ -100,6 +102,9 @@ public abstract class NativeWindowFactory {
     /** Mac OS X type, as retrieved with {@link #getNativeWindowType(boolean)}. String is canonical via {@link String#intern()}. */
     public static final String TYPE_MACOSX = ".macosx";
 
+    /** iOS type, as retrieved with {@link #getNativeWindowType(boolean)}. String is canonical via {@link String#intern()}. */
+    public static final String TYPE_IOS = ".iOS";
+
     /** Generic AWT type, as retrieved with {@link #getNativeWindowType(boolean)}. String is canonical via {@link String#intern()}. */
     public static final String TYPE_AWT = ".awt";
 
@@ -120,6 +125,8 @@ public abstract class NativeWindowFactory {
     private static final String X11UtilClassName = "jogamp.nativewindow.x11.X11Util";
     /** {@link jogamp.nativewindow.macosx.OSXUtil} implements {@link ToolkitProperties}. */
     private static final String OSXUtilClassName = "jogamp.nativewindow.macosx.OSXUtil";
+    /** {@link jogamp.nativewindow.ios.IOSUtil} implements {@link ToolkitProperties}. */
+    private static final String IOSUtilClassName = "jogamp.nativewindow.ios.IOSUtil";
     /** {@link jogamp.nativewindow.windows.GDIUtil} implements {@link ToolkitProperties}. */
     private static final String GDIClassName = "jogamp.nativewindow.windows.GDIUtil";
 
@@ -143,6 +150,8 @@ public abstract class NativeWindowFactory {
               return TYPE_ANDROID;
             case MACOS:
               return TYPE_MACOSX;
+            case IOS:
+              return TYPE_IOS;
             case WINDOWS:
               return TYPE_WINDOWS;
             case OPENKODE:
@@ -204,6 +213,8 @@ public abstract class NativeWindowFactory {
             clazzName = GDIClassName;
         } else if( TYPE_MACOSX == nativeWindowingTypePure ) {
             clazzName = OSXUtilClassName;
+        } else if( TYPE_IOS == nativeWindowingTypePure ) {
+            clazzName = IOSUtilClassName;
         } else {
             clazzName = null;
         }
@@ -294,6 +305,8 @@ public abstract class NativeWindowFactory {
             clazzName = GDIClassName;
         } else if( TYPE_MACOSX == nativeWindowingTypePure ) {
             clazzName = OSXUtilClassName;
+        } else if( TYPE_IOS == nativeWindowingTypePure ) {
+            clazzName = IOSUtilClassName;
         } else {
             clazzName = null;
         }
@@ -677,6 +690,8 @@ public abstract class NativeWindowFactory {
             return new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         } else if( NativeWindowFactory.TYPE_MACOSX == nwt ) {
             return new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
+        } else if( NativeWindowFactory.TYPE_IOS == nwt ) {
+            return new IOSGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         } else if( NativeWindowFactory.TYPE_EGL == nwt ) {
             final EGLGraphicsDevice device;
             if( own ) {
@@ -742,6 +757,8 @@ public abstract class NativeWindowFactory {
             return GDIUtil.GetRelativeLocation(nw.getWindowHandle(), 0, 0, 0);
         } else if( NativeWindowFactory.TYPE_MACOSX == nwt ) {
             return OSXUtil.GetLocationOnScreen(nw.getWindowHandle(), 0, 0);
+        } else if( NativeWindowFactory.TYPE_IOS == nwt ) {
+            return IOSUtil.GetLocationOnScreen(nw.getWindowHandle(), 0, 0);
         /**
          * FIXME: Needs service provider interface (SPI) for TK dependent implementation
         } else if( NativeWindowFactory.TYPE_BCM_VC_IV == nwt ) {
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/ios/IOSGraphicsDevice.java b/src/nativewindow/classes/com/jogamp/nativewindow/ios/IOSGraphicsDevice.java
new file mode 100644
index 000000000..0a4354c9d
--- /dev/null
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/ios/IOSGraphicsDevice.java
@@ -0,0 +1,46 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.nativewindow.ios;
+
+import com.jogamp.nativewindow.*;
+
+/** Encapsulates a graphics device on IOS platforms.
+ */
+public class IOSGraphicsDevice extends DefaultGraphicsDevice implements Cloneable {
+    /** Constructs a new IOSGraphicsDevice */
+    public IOSGraphicsDevice(final int unitID) {
+        super(NativeWindowFactory.TYPE_IOS, AbstractGraphicsDevice.DEFAULT_CONNECTION, unitID);
+    }
+
+    @Override
+    public Object clone() {
+      return super.clone();
+    }
+}
+
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/javafx/JFXAccessor.java b/src/nativewindow/classes/com/jogamp/nativewindow/javafx/JFXAccessor.java
index bffabdd5a..9d38b1f4b 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/javafx/JFXAccessor.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/javafx/JFXAccessor.java
@@ -62,6 +62,7 @@ public class JFXAccessor {
 
     private static final String nwt;
     private static final boolean isOSX;
+    private static final boolean isIOS;
     private static final boolean isWindows;
     private static final boolean isX11;
 
@@ -130,6 +131,7 @@ public class JFXAccessor {
 
         nwt = NativeWindowFactory.getNativeWindowType(false);
         isOSX = NativeWindowFactory.TYPE_MACOSX == nwt;
+        isIOS = NativeWindowFactory.TYPE_IOS == nwt;
         isWindows = NativeWindowFactory.TYPE_WINDOWS == nwt;
         isX11 = NativeWindowFactory.TYPE_X11 == nwt;
 
diff --git a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java
new file mode 100644
index 000000000..a61287f8b
--- /dev/null
+++ b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java
@@ -0,0 +1,83 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.nativewindow.ios;
+
+import com.jogamp.nativewindow.NativeSurface;
+import com.jogamp.nativewindow.NativeWindowException;
+import com.jogamp.nativewindow.ProxySurface;
+import com.jogamp.nativewindow.UpstreamSurfaceHook;
+
+import com.jogamp.nativewindow.UpstreamSurfaceHookMutableSize;
+
+public class IOSDummyUpstreamSurfaceHook extends UpstreamSurfaceHookMutableSize {
+    long uiWindow;
+
+    /**
+     * @param width the initial width as returned by {@link NativeSurface#getSurfaceWidth()} via {@link UpstreamSurfaceHook#getSurfaceWidth(ProxySurface)},
+     *        not the actual dummy surface width.
+     *        The latter is platform specific and small
+     * @param height the initial height as returned by {@link NativeSurface#getSurfaceHeight()} via {@link UpstreamSurfaceHook#getSurfaceHeight(ProxySurface)},
+     *        not the actual dummy surface height,
+     *        The latter is platform specific and small
+     */
+    public IOSDummyUpstreamSurfaceHook(final int width, final int height) {
+        super(width, height);
+        uiWindow = 0;
+    }
+
+    @Override
+    public final void create(final ProxySurface s) {
+        if(0 == uiWindow && 0 == s.getSurfaceHandle()) {
+            uiWindow = IOSUtil.CreateUIWindow(0, 0, 64, 64);
+            if(0 == uiWindow) {
+                throw new NativeWindowException("Error UI window 0");
+            }
+            final long uiView = IOSUtil.GetUIView(uiWindow, true);
+            if(0 == uiView) {
+                throw new NativeWindowException("Error UI view 0");
+            }
+            s.setSurfaceHandle(uiView);
+            s.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+        }
+        s.addUpstreamOptionBits(ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE);
+    }
+
+    @Override
+    public final void destroy(final ProxySurface s) {
+        if( s.containsUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE ) ) {
+            if( 0 == uiWindow || 0 == s.getSurfaceHandle() ) {
+                throw new InternalError("Owns upstream surface, but no IOS view/window: "+s+", uiWindow 0x"+Long.toHexString(uiWindow));
+            }
+            IOSUtil.DestroyUIWindow(uiWindow);
+            uiWindow = 0;
+            s.setSurfaceHandle(0);
+            s.clearUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+        }
+    }
+
+}
diff --git a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java
new file mode 100644
index 000000000..bd4b36239
--- /dev/null
+++ b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java
@@ -0,0 +1,333 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.nativewindow.ios;
+
+import com.jogamp.nativewindow.NativeWindowException;
+import com.jogamp.nativewindow.NativeWindowFactory;
+import com.jogamp.nativewindow.util.Insets;
+import com.jogamp.nativewindow.util.Point;
+import com.jogamp.common.util.Function;
+import com.jogamp.common.util.FunctionTask;
+import com.jogamp.common.util.InterruptedRuntimeException;
+import com.jogamp.common.util.RunnableTask;
+
+import jogamp.nativewindow.Debug;
+import jogamp.nativewindow.NWJNILibLoader;
+import jogamp.nativewindow.ToolkitProperties;
+
+public class IOSUtil implements ToolkitProperties {
+    private static boolean isInit = false;
+    private static final boolean DEBUG = Debug.debug("IOSUtil");
+
+    /** FIXME HiDPI: OSX unique and maximum value {@value} */
+    public static final int MAX_PIXELSCALE = 2;
+
+    /**
+     * Called by {@link NativeWindowFactory#initSingleton()}
+     * @see ToolkitProperties
+     */
+    public static synchronized void initSingleton() {
+      if(!isInit) {
+          if(DEBUG) {
+              System.out.println("IOSUtil.initSingleton()");
+          }
+          if(!NWJNILibLoader.loadNativeWindow("ios")) {
+              throw new NativeWindowException("NativeWindow IOS native library load error.");
+          }
+
+          if( !initIDs0() ) {
+              throw new NativeWindowException("IOS: Could not initialized native stub");
+          }
+          isInit = true;
+      }
+    }
+
+    /**
+     * Called by {@link NativeWindowFactory#shutdown()}
+     * @see ToolkitProperties
+     */
+    public static void shutdown() { }
+
+    /**
+     * Called by {@link NativeWindowFactory#initSingleton()}
+     * @see ToolkitProperties
+     */
+    public static boolean requiresToolkitLock() { return false; }
+
+    /**
+     * Called by {@link NativeWindowFactory#initSingleton()}
+     * @see ToolkitProperties
+     */
+    public static final boolean hasThreadingIssues() { return false; }
+
+    public static boolean isCALayer(final long object) {
+        return 0 != object ? isCALayer0(object) : false;
+    }
+
+    public static boolean isCAEAGLLayer(final long object) {
+        return 0 != object ? isCAEAGLLayer0(object) : false;
+    }
+
+    public static boolean isUIView(final long object) {
+        return 0 != object ? isUIView0(object) : false;
+    }
+
+    public static boolean isUIWindow(final long object) {
+        return 0 != object ? isUIWindow0(object) : false;
+    }
+
+    /**
+     * @param windowOrView
+     * @param src_x
+     * @param src_y
+     * @return top-left client-area position in window units
+     */
+    public static Point GetLocationOnScreen(final long windowOrView, final int src_x, final int src_y) {
+      return (Point) GetLocationOnScreen0(windowOrView, src_x, src_y);
+    }
+
+    public static Insets GetInsets(final long windowOrView) {
+      return (Insets) GetInsets0(windowOrView);
+    }
+
+    public static double GetPixelScaleByDisplayID(final int displayID) {
+      if( 0 != displayID ) {
+          return GetPixelScale1(displayID);
+      } else {
+          return 1.0; // default
+      }
+    }
+    public static double GetPixelScale(final long windowOrView) {
+      if( 0 != windowOrView ) {
+          return GetPixelScale2(windowOrView);
+      } else {
+          return 1.0; // default
+      }
+    }
+
+    public static long CreateUIWindow(final int x, final int y, final int width, final int height) {
+      final long res[] = { 0 };
+      RunOnMainThread(true, false /* kickNSApp */, new Runnable() {
+          @Override
+          public void run() {
+              res[0] = CreateUIWindow0(x, y, width, height);
+          } } );
+      return res[0];
+    }
+    public static void DestroyUIWindow(final long uiWindow) {
+      DestroyUIWindow0(uiWindow);
+    }
+    public static long GetCALayer(final long uiView) {
+      return 0 != uiView ? GetCALayer0(uiView) : 0;
+    }
+    public static long GetCAEAGLLayer(final long uiView) {
+      return 0 != uiView ? GetCAEAGLLayer0(uiView) : 0;
+    }
+    public static long GetUIView(final long uiWindow, final boolean onlyEAGL) {
+      return 0 != uiWindow ? GetUIView0(uiWindow, onlyEAGL) : 0;
+    }
+    public static long GetUIWindow(final long uiView) {
+      return 0 != uiView ? GetUIWindow0(uiView) : 0;
+    }
+
+    /**
+     * Set the UIView's pixelScale / contentScale for HiDPI
+     *
+     * @param uiView the mutable UIView instance
+     * @param contentScaleFactor scale for HiDPI support: pixel-dim = window-dim x scale
+     */
+    public static void SetUIViewPixelScale(final long uiView, final float contentScaleFactor) {
+        SetUIViewPixelScale0(uiView, contentScaleFactor);
+    }
+    /**
+     * Get the UIView's pixelScale / contentScale for HiDPI
+     *
+     * @param uiView the UIView instance
+     * @return used scale for HiDPI support: pixel-dim = window-dim x scale
+     */
+    public static float GetUIViewPixelScale(final long uiView) {
+        return GetUIViewPixelScale0(uiView);
+    }
+
+    /**
+     * Set root and sub CALayer pixelScale / contentScale for HiDPI
+     *
+     * @param rootCALayer the root surface layer, maybe null.
+     * @param subCALayer the client surface layer, maybe null.
+     * @param contentsScale scale for HiDPI support: pixel-dim = window-dim x scale
+     */
+    public static void SetCALayerPixelScale(final long rootCALayer, final long subCALayer, final float contentsScale) {
+        if( 0==rootCALayer && 0==subCALayer ) {
+            return;
+        }
+        SetCALayerPixelScale0(rootCALayer, subCALayer, contentsScale);
+    }
+    /**
+     * Get the CALayer's pixelScale / contentScale for HiDPI
+     *
+     * @param caLayer the CALayer instance
+     * @return used scale for HiDPI support: pixel-dim = window-dim x scale
+     */
+    public static float GetCALayerPixelScale(final long caLayer) {
+        return GetCALayerPixelScale0(caLayer);
+    }
+
+    /**
+     * Run on OSX UI main thread.
+     * <p>
+     * 'waitUntilDone' is implemented on Java site via lock/wait on {@link RunnableTask} to not freeze OSX main thread.
+     * </p>
+     *
+     * @param waitUntilDone
+     * @param kickNSApp if <code>true</code> issues {@link #KickUIApp()}
+     * @param runnable
+     */
+    public static void RunOnMainThread(final boolean waitUntilDone, final boolean kickNSApp, final Runnable runnable) {
+        if( IsMainThread0() ) {
+            runnable.run(); // don't leave the JVM
+        } else {
+            // Utilize Java side lock/wait and simply pass the Runnable async to OSX main thread,
+            // otherwise we may freeze the OSX main thread.
+            final Object sync = new Object();
+            final RunnableTask rt = new RunnableTask( runnable, waitUntilDone ? sync : null, true, waitUntilDone ? null : System.err );
+            synchronized(sync) {
+                RunOnMainThread0(kickNSApp, rt);
+                if( waitUntilDone ) {
+                    while( rt.isInQueue() ) {
+                        try {
+                            sync.wait();
+                        } catch (final InterruptedException ie) {
+                            throw new InterruptedRuntimeException(ie);
+                        }
+                        final Throwable throwable = rt.getThrowable();
+                        if(null!=throwable) {
+                            throw new RuntimeException(throwable);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Run later on ..
+     * @param onMain if true, run on main-thread, otherwise on the current OSX thread.
+     * @param runnable
+     * @param delay delay to run the runnable in milliseconds
+     */
+    public static void RunLater(final boolean onMain, final Runnable runnable, final int delay) {
+        RunLater0(onMain, false /* kickNSApp */, new RunnableTask( runnable, null, true, System.err ), delay);
+    }
+
+    private static Runnable _nop = new Runnable() { @Override public void run() {}; };
+
+    /** Issues a {@link #RunOnMainThread(boolean, boolean, Runnable)} w/ an <i>NOP</i> runnable, while waiting until done and issuing {@link #KickUIApp()}. */
+    public static void WaitUntilFinish() {
+        RunOnMainThread(true, true /* kickNSApp */, _nop);
+    }
+
+    /**
+     * Run on OSX UI main thread.
+     * <p>
+     * 'waitUntilDone' is implemented on Java site via lock/wait on {@link FunctionTask} to not freeze OSX main thread.
+     * </p>
+     *
+     * @param waitUntilDone
+     * @param kickUIApp if <code>true</code> issues {@link #KickUIApp()}
+     * @param func
+     */
+    public static <R,A> R RunOnMainThread(final boolean waitUntilDone, final boolean kickUIApp, final Function<R,A> func, final A... args) {
+        if( IsMainThread0() ) {
+            return func.eval(args); // don't leave the JVM
+        } else {
+            // Utilize Java side lock/wait and simply pass the Runnable async to OSX main thread,
+            // otherwise we may freeze the OSX main thread.
+            final Object sync = new Object();
+            final FunctionTask<R,A> rt = new FunctionTask<R,A>( func, waitUntilDone ? sync : null, true, waitUntilDone ? null : System.err );
+            synchronized(sync) {
+                rt.setArgs(args);
+                RunOnMainThread0(kickUIApp, rt);
+                if( waitUntilDone ) {
+                    while( rt.isInQueue() ) {
+                        try {
+                            sync.wait();
+                        } catch (final InterruptedException ie) {
+                            throw new InterruptedRuntimeException(ie);
+                        }
+                        final Throwable throwable = rt.getThrowable();
+                        if(null!=throwable) {
+                            throw new RuntimeException(throwable);
+                        }
+                    }
+                }
+            }
+            return rt.getResult();
+        }
+    }
+
+    public static boolean IsMainThread() {
+        return IsMainThread0();
+    }
+
+    /** Returns the screen refresh rate in Hz. If unavailable, returns 60Hz. */
+    public static int GetScreenRefreshRate(final int scrn_idx) {
+        return GetScreenRefreshRate0(scrn_idx);
+    }
+
+    public static void CreateGLViewDemoA() {
+        CreateGLViewDemoA0();
+    }
+
+    private static native boolean initIDs0();
+    private static native boolean isCALayer0(long object);
+    private static native boolean isCAEAGLLayer0(long object);
+    private static native boolean isUIView0(long object);
+    private static native boolean isUIWindow0(long object);
+    private static native Object GetLocationOnScreen0(long windowOrView, int src_x, int src_y);
+    private static native Object GetInsets0(long windowOrView);
+    private static native double GetPixelScale1(int displayID);
+    private static native double GetPixelScale2(long windowOrView);
+    private static native long CreateUIWindow0(int x, int y, int width, int height);
+    private static native void DestroyUIWindow0(long uiWindow);
+    private static native long GetCALayer0(long uiView);
+    private static native long GetCAEAGLLayer0(long uiView);
+    private static native long GetUIView0(long uiWindow, boolean onlyEAGL);
+    private static native long GetUIWindow0(long uiView);
+    private static native void SetUIViewPixelScale0(final long uiView, final float contentScaleFactor);
+    private static native float GetUIViewPixelScale0(final long uiView);
+    private static native void SetCALayerPixelScale0(long rootCALayer, long subCALayer, float contentsScale);
+    private static native float GetCALayerPixelScale0(final long caLayer);
+
+    private static native void RunOnMainThread0(boolean kickNSApp, Runnable runnable);
+    private static native void RunLater0(boolean onMain, boolean kickNSApp, Runnable runnable, int delay);
+    private static native void KickUIApp0();
+    private static native boolean IsMainThread0();
+    private static native int GetScreenRefreshRate0(int scrn_idx);
+    private static native void CreateGLViewDemoA0();
+
+}
diff --git a/src/nativewindow/native/JVM_JNI8.c b/src/nativewindow/native/JVM_JNI8.c
new file mode 100644
index 000000000..a7b4e5d90
--- /dev/null
+++ b/src/nativewindow/native/JVM_JNI8.c
@@ -0,0 +1,47 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+#include <stdio.h> //required by android to identify NULL
+#include <jni.h>
+
+#if defined (JNI_VERSION_1_8)
+
+JNIEXPORT jint JNICALL JNI_OnLoad_nativewindow_awt(JavaVM *vm, void *reserved) { return JNI_VERSION_1_8; }
+JNIEXPORT jint JNICALL JNI_OnLoad_nativewindow_x11(JavaVM *vm, void *reserved) { return JNI_VERSION_1_8; }
+JNIEXPORT jint JNICALL JNI_OnLoad_nativewindow_win32(JavaVM *vm, void *reserved) { return JNI_VERSION_1_8; }
+JNIEXPORT jint JNICALL JNI_OnLoad_nativewindow_macosx(JavaVM *vm, void *reserved) { return JNI_VERSION_1_8; }
+JNIEXPORT jint JNICALL JNI_OnLoad_nativewindow_ios(JavaVM *vm, void *reserved) { return JNI_VERSION_1_8; }
+
+JNIEXPORT void JNICALL JNI_OnUnload_nativewindow_awt(JavaVM *vm, void *reserved) { }
+JNIEXPORT void JNICALL JNI_OnUnload_nativewindow_x11(JavaVM *vm, void *reserved) { }
+JNIEXPORT void JNICALL JNI_OnUnload_nativewindow_win32(JavaVM *vm, void *reserved) { }
+JNIEXPORT void JNICALL JNI_OnUnload_nativewindow_macosx(JavaVM *vm, void *reserved) { }
+JNIEXPORT void JNICALL JNI_OnUnload_nativewindow_ios(JavaVM *vm, void *reserved) { }
+
+#endif /* defined (JNI_VERSION_1_8) */
+
diff --git a/src/nativewindow/native/ios/CAEAGLLayered.h b/src/nativewindow/native/ios/CAEAGLLayered.h
new file mode 100644
index 000000000..fe94dc907
--- /dev/null
+++ b/src/nativewindow/native/ios/CAEAGLLayered.h
@@ -0,0 +1,50 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+#ifndef CAEAGL_LAYERED_H
+#define CAEAGL_LAYERED_H 1
+
+#import <UIKit/UIKit.h>
+#import <QuartzCore/QuartzCore.h>
+
+#include "NativewindowCommon.h"
+
+@interface CAEAGLUIView : UIView 
+{
+}
+// override
++ (Class)layerClass;
+
++ (CAEAGLUIView*) findCAEAGLUIView: (UIWindow*) win 
+                  startIdx: (int) sidx;
+
++ (UIView*) getUIView: (UIWindow*) win 
+                  startIdx: (int) sidx;
+@end /* interface CAEAGLUIView */
+
+#endif
diff --git a/src/nativewindow/native/ios/CAEAGLLayered.m b/src/nativewindow/native/ios/CAEAGLLayered.m
new file mode 100644
index 000000000..3d378e997
--- /dev/null
+++ b/src/nativewindow/native/ios/CAEAGLLayered.m
@@ -0,0 +1,66 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+#include "CAEAGLLayered.h"
+
+@implementation CAEAGLUIView
+// override
++ (Class)layerClass {
+    return CAEAGLLayer.self;
+}
+/**
+override class var layerClass : AnyClass {
+    return CAEAGLLayer.self
+}
+*/
++ (CAEAGLUIView*) findCAEAGLUIView: (UIWindow*) win 
+                  startIdx: (int) sidx
+{
+    NSArray* subviews = [win subviews];
+    if(NULL != subviews) {
+        for(int i=sidx; i<[subviews count]; i++) {
+            UIView* sub = [subviews objectAtIndex: i];
+            if( [sub isKindOfClass:[CAEAGLUIView class]] ) {
+               return (CAEAGLUIView*)sub; 
+            }
+        }
+    }
+    return (CAEAGLUIView*)NULL;
+}
++ (UIView*) getUIView: (UIWindow*) win 
+                  startIdx: (int) sidx
+{
+    NSArray* subviews = [win subviews];
+    if(NULL != subviews) {
+        if( sidx<[subviews count] ) {
+            return [subviews objectAtIndex: sidx];
+        }
+    }
+    return (UIView*)NULL;
+}
+@end /* implementation CAEAGLUIView */
diff --git a/src/nativewindow/native/ios/IOSmisc.m b/src/nativewindow/native/ios/IOSmisc.m
new file mode 100644
index 000000000..5826b9eef
--- /dev/null
+++ b/src/nativewindow/native/ios/IOSmisc.m
@@ -0,0 +1,813 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+ 
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <unistd.h>
+
+#include "CAEAGLLayered.h"
+
+#import "NativeWindowProtocols.h"
+
+#include "jogamp_nativewindow_ios_IOSUtil.h"
+
+// #define VERBOSE 1
+//
+#ifdef VERBOSE
+    // #define DBG_PRINT(...) NSLog(@ ## __VA_ARGS__)
+    #define DBG_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr)
+#else
+    #define DBG_PRINT(...)
+#endif
+
+// #define VERBOSE2 1
+//
+#ifdef VERBOSE2
+    #define DBG_PRINT2(...) fprintf(stderr, __VA_ARGS__); fflush(stderr)
+#else
+    #define DBG_PRINT2(...)
+#endif
+
+// #define DBG_LIFECYCLE 1
+
+static const char * const ClazzNameRunnable = "java/lang/Runnable";
+static jmethodID runnableRunID = NULL;
+
+static const char * const ClazzAnyCstrName = "<init>";
+
+static const char * const ClazzNamePoint = "com/jogamp/nativewindow/util/Point";
+static const char * const ClazzNamePointCstrSignature = "(II)V";
+static jclass pointClz = NULL;
+static jmethodID pointCstr = NULL;
+
+static const char * const ClazzNameInsets = "com/jogamp/nativewindow/util/Insets";
+static const char * const ClazzNameInsetsCstrSignature = "(IIII)V";
+static jclass insetsClz = NULL;
+static jmethodID insetsCstr = NULL;
+
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_ios_IOSUtil_initIDs0(JNIEnv *env, jclass _unused) {
+    if( NativewindowCommon_init(env) ) {
+        jclass c;
+        c = (*env)->FindClass(env, ClazzNamePoint);
+        if(NULL==c) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't find %s", ClazzNamePoint);
+        }
+        pointClz = (jclass)(*env)->NewGlobalRef(env, c);
+        (*env)->DeleteLocalRef(env, c);
+        if(NULL==pointClz) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't use %s", ClazzNamePoint);
+        }
+        pointCstr = (*env)->GetMethodID(env, pointClz, ClazzAnyCstrName, ClazzNamePointCstrSignature);
+        if(NULL==pointCstr) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't fetch %s.%s %s",
+                ClazzNamePoint, ClazzAnyCstrName, ClazzNamePointCstrSignature);
+        }
+
+        c = (*env)->FindClass(env, ClazzNameInsets);
+        if(NULL==c) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't find %s", ClazzNameInsets);
+        }
+        insetsClz = (jclass)(*env)->NewGlobalRef(env, c);
+        (*env)->DeleteLocalRef(env, c);
+        if(NULL==insetsClz) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't use %s", ClazzNameInsets);
+        }
+        insetsCstr = (*env)->GetMethodID(env, insetsClz, ClazzAnyCstrName, ClazzNameInsetsCstrSignature);
+        if(NULL==insetsCstr) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't fetch %s.%s %s",
+                ClazzNameInsets, ClazzAnyCstrName, ClazzNameInsetsCstrSignature);
+        }
+
+        c = (*env)->FindClass(env, ClazzNameRunnable);
+        if(NULL==c) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't find %s", ClazzNameRunnable);
+        }
+        runnableRunID = (*env)->GetMethodID(env, c, "run", "()V");
+        if(NULL==runnableRunID) {
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_ios_IOSUtil_initIDs0: can't fetch %s.run()V", ClazzNameRunnable);
+        }
+    }
+    return JNI_TRUE;
+}
+
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_ios_IOSUtil_isCAEAGLLayer0(JNIEnv *env, jclass _unused, jlong object) {
+    NSObject *nsObj = (NSObject*) (intptr_t) object;
+    jboolean u = [nsObj isKindOfClass:[CAEAGLLayer class]];
+    DBG_PRINT( "isEAGLCALayer(obj: %p): %s -> %d\n", nsObj, [[nsObj description] UTF8String], u);
+    return u;
+}
+
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_ios_IOSUtil_isCALayer0(JNIEnv *env, jclass _unused, jlong object) {
+    NSObject *nsObj = (NSObject*) (intptr_t) object;
+    jboolean u = [nsObj isKindOfClass:[CALayer class]];
+    DBG_PRINT( "isCALayer(obj: %p): %s -> %d\n", nsObj, [[nsObj description] UTF8String], u);
+    return u;
+}
+
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_ios_IOSUtil_isUIView0(JNIEnv *env, jclass _unused, jlong object) {
+    NSObject *nsObj = (NSObject*) (intptr_t) object;
+    jboolean u = [nsObj isKindOfClass:[UIView class]];
+    DBG_PRINT( "isUIView(obj: %p): %s -> %d\n", nsObj, [[nsObj description] UTF8String], u);
+    return u;
+}
+
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_ios_IOSUtil_isUIWindow0(JNIEnv *env, jclass _unused, jlong object) {
+    NSObject *nsObj = (NSObject*) (intptr_t) object;
+    jboolean u = [nsObj isKindOfClass:[UIWindow class]];
+    DBG_PRINT( "isUIWindow(obj: %p): %s -> %d\n", nsObj, [[nsObj description] UTF8String], u);
+    return u;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    getLocationOnScreen0
+ * Signature: (JII)Lcom/jogamp/nativewindow/util/Point;
+ */
+JNIEXPORT jobject JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetLocationOnScreen0
+  (JNIEnv *env, jclass unused, jlong winOrView, jint src_x, jint src_y)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+    /**
+     * return location in 0/0 top-left space,
+     * OSX NSView is 0/0 bottom-left space naturally
+     * iOS UIView is 0/0 top-left space naturally
+     */
+    NSObject *nsObj = (NSObject*) (intptr_t) winOrView;
+    UIWindow* win = NULL;
+
+    if( [nsObj isKindOfClass:[UIWindow class]] ) {
+        win = (UIWindow*) nsObj;
+    } else if( nsObj != NULL && [nsObj isKindOfClass:[UIView class]] ) {
+        UIView* view = (UIView*) nsObj;
+        win = [view window];
+        if( NULL == win ) {
+            NativewindowCommon_throwNewRuntimeException(env, "view has null window, view %p\n", nsObj);
+        }
+    } else {
+        NativewindowCommon_throwNewRuntimeException(env, "neither win nor view %p\n", nsObj);
+    }
+    CGPoint p = CGPointMake(src_x, src_y);
+    UIScreen* screen = [win screen];
+    CGPoint pS = [win convertPoint: p toCoordinateSpace: screen.fixedCoordinateSpace];
+
+#ifdef VERBOSE_ON
+    CGRect winFrame = [self frame];
+    DBG_PRINT( "GetLocationOnScreen0(window: %p):: point-in[%d/%d], winFrame[%d/%d %dx%d] -> %d/%d\n",
+        win, 
+        (int)p.x, (int)p.y,
+        (int)winFrame.origin.x, (int)winFrame.origin.y, (int)winFrame.size.width, (int)winFrame.size.height,
+        (int)pS.x, (int)pS.y);
+#endif
+
+    jobject res = (*env)->NewObject(env, pointClz, pointCstr, (jint)pS.x, (jint)pS.y);
+
+    [pool release];
+
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    getInsets0
+ * Signature: (J)Lcom/jogamp/nativewindow/util/Insets;
+ */
+JNIEXPORT jobject JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetInsets0
+  (JNIEnv *env, jclass unused, jlong winOrView)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+    NSObject *nsObj = (NSObject*) (intptr_t) winOrView;
+    UIWindow* win = NULL;
+    jint il,ir,it,ib;
+
+    if( [nsObj isKindOfClass:[UIWindow class]] ) {
+        win = (UIWindow*) nsObj;
+    } else if( nsObj != NULL && [nsObj isKindOfClass:[UIView class]] ) {
+        UIView* view = (UIView*) nsObj;
+        win = [view window];
+        if( NULL == win ) {
+            NativewindowCommon_throwNewRuntimeException(env, "view has null window, view %p\n", nsObj);
+        }
+    } else {
+        NativewindowCommon_throwNewRuntimeException(env, "neither win nor view %p\n", nsObj);
+    }
+
+    UIEdgeInsets uiInsets = [win safeAreaInsets];
+    il = uiInsets.left;
+    ir = uiInsets.right;
+    it = uiInsets.top;
+    ib = uiInsets.bottom;
+    /**
+    CGRect frameRect = [win frame];
+    CGRect contentRect = [win contentRectForFrameRect: frameRect];
+
+    // note: this is a simplistic implementation which doesn't take
+    // into account DPI and scaling factor
+    CGFloat l = contentRect.origin.x - frameRect.origin.x;
+    il = (jint)l;                                                     // l
+    ir = (jint)(frameRect.size.width - (contentRect.size.width + l)); // r
+    it = (jint)(frameRect.size.height - contentRect.size.height);     // t
+    ib = (jint)(contentRect.origin.y - frameRect.origin.y);           // b
+    */
+
+    jobject res = (*env)->NewObject(env, insetsClz, insetsCstr, il, ir, it, ib);
+
+    [pool release];
+
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetPixelScale1
+ * Signature: (I)D
+ */
+JNIEXPORT jdouble JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetPixelScale1
+  (JNIEnv *env, jclass unused, jint displayID)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+    CGFloat pixelScale = 1.0; // default
+    // UIScreen *screen =  IOSUtil_getUIScreenByCGDirectDisplayID((CGDirectDisplayID)displayID);
+    UIScreen *screen =  [UIScreen mainScreen];
+    if( NULL != screen ) {
+NS_DURING
+        // Available >= 10.7
+        pixelScale = [screen scale]; // HiDPI scaling
+NS_HANDLER
+NS_ENDHANDLER
+    }
+    [pool release];
+
+    return (jdouble)pixelScale;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetPixelScale1
+ * Signature: (J)D
+ */
+JNIEXPORT jdouble JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetPixelScale2
+  (JNIEnv *env, jclass unused, jlong winOrView)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+    NSObject *nsObj = (NSObject*) (intptr_t) winOrView;
+    UIScreen *screen = NULL;
+
+    if( [nsObj isKindOfClass:[UIWindow class]] ) {
+        UIWindow* win = (UIWindow*) nsObj;
+        screen = [win screen];
+    } else if( nsObj != NULL && [nsObj isKindOfClass:[UIView class]] ) {
+        UIView* view = (UIView*) nsObj;
+        UIWindow* win = [view window];
+        if( NULL == win ) {
+            NativewindowCommon_throwNewRuntimeException(env, "view has null window, view %p\n", nsObj);
+        }
+        screen = [win screen];
+    } else {
+        NativewindowCommon_throwNewRuntimeException(env, "neither win nor view %p\n", nsObj);
+    }
+
+    CGFloat pixelScale = 1.0; // default
+NS_DURING
+    // Available >= 10.7
+    pixelScale = [screen scale]; // HiDPI scaling
+NS_HANDLER
+NS_ENDHANDLER
+
+    [pool release];
+
+    return (jdouble)pixelScale;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    CreateUIWindow0
+ * Signature: (IIIIZ)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_CreateUIWindow0
+  (JNIEnv *env, jclass unused, jint x, jint y, jint width, jint height)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    [CATransaction begin];
+    CGRect boundsWin = CGRectMake(x, y, width, height);
+    CGRect boundsView = CGRectMake(0, 0, width, height);
+
+    // Allocate the window
+    UIWindow *myWindow = [[[[UIWindow alloc] initWithFrame:boundsWin] autorelease] retain];
+    myWindow.rootViewController = [[[UIViewController alloc] initWithNibName:nil bundle:nil] autorelease];
+    [myWindow setBackgroundColor: [UIColor redColor]];
+
+    // n/a iOS [myWindow setPreservesContentDuringLiveResize: YES];
+
+    // FIXME invisible .. (we keep it visible for testing)
+    // FIXME [myWindow setOpaque: NO];
+    // FIXME [myWindow setBackgroundColor: [UIColor clearColor]];
+    [myWindow makeKeyAndVisible];
+
+    CAEAGLUIView *uiView = [[CAEAGLUIView alloc] initWithFrame:boundsView];
+    CAEAGLLayer* l = (CAEAGLLayer*)[uiView layer];
+    [l setOpaque: YES];
+
+    [myWindow addSubview: uiView];
+
+    [CATransaction commit];
+    [pool release];
+    return (jlong) ((intptr_t) myWindow);
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    DestroyUIWindow0
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_DestroyUIWindow0
+  (JNIEnv *env, jclass unused, jlong nsWindow)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    [CATransaction begin];
+
+NS_DURING
+    UIWindow* mWin = (UIWindow*) ((intptr_t) nsWindow);
+    [mWin resignKeyWindow];
+    [mWin setHidden: YES];
+    NSArray* subviews = [mWin subviews];
+    if(NULL != subviews) {
+        for(int i=0; i<[subviews count]; i++) {
+            UIView* sub = [subviews objectAtIndex: i];
+            [sub setHidden: YES];
+            [sub release];
+        }
+    }
+    [mWin release];
+NS_HANDLER
+    // On killing or terminating the process [UIWindow _close], rarely
+    // throws an NSRangeException while ordering out menu items
+NS_ENDHANDLER
+
+    [CATransaction commit];
+    [pool release];
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetCALayer0
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetCALayer0
+  (JNIEnv *env, jclass unused, jlong view)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIView* uiView = (UIWindow*) ((intptr_t) view);
+
+    jlong res = (jlong) ((intptr_t) (CALayer *) [uiView layer]);
+
+    DBG_PRINT( "GetCALayer(view: %p): %p\n", uiView, (void*) (intptr_t) res);
+
+    [pool release];
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetCAEAGLLayer0
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetCAEAGLLayer0
+  (JNIEnv *env, jclass unused, jlong view)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIView* uiView = (UIWindow*) ((intptr_t) view);
+
+    CALayer* l = [uiView layer];
+    jboolean isRes = [l isKindOfClass:[CAEAGLLayer class]];
+    jlong res = isRes ? (jlong) ((intptr_t) l) : 0;
+
+    DBG_PRINT( "GetCAEAGLLayer(view: %p): CALayer %p, CAEAGLLayer %p (%d)\n", uiView, l, (void*) (intptr_t) res, isRes);
+
+    [pool release];
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetUIView0
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetUIView0
+  (JNIEnv *env, jclass unused, jlong window, jboolean onlyCAEAGLUIView)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIWindow* win = (UIWindow*) ((intptr_t) window);
+    jlong res;
+
+    if( onlyCAEAGLUIView ) {
+        CAEAGLUIView* v0 = [CAEAGLUIView findCAEAGLUIView: win
+                                         startIdx: 0];
+        res = (jlong) ((intptr_t) v0);
+    } else {
+        UIView* v0 = [CAEAGLUIView getUIView: win startIdx: 0];
+        res = (jlong) ((intptr_t) v0);
+    }
+
+    DBG_PRINT( "GetUIView(window: %p): %p\n", win, (void*) (intptr_t) res);
+
+    [pool release];
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetUIWindow0
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetUIWindow0
+  (JNIEnv *env, jclass unused, jlong view)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIView* v = (UIView*) ((intptr_t) view);
+
+    jlong res = (jlong) ((intptr_t) [v window]);
+
+    DBG_PRINT( "GetUIWindow(view: %p): %p\n", v, (void*) (intptr_t) res);
+
+    [pool release];
+    return res;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    SetUIViewPixelScale0
+ * Signature: (JF)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_SetUIViewPixelScale0
+  (JNIEnv *env, jclass unused, jlong view, jfloat contentScale)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIView* v = (UIView*) ((intptr_t) view);
+
+NS_DURING
+    if( NULL != v ) {
+        [v setContentScaleFactor: (CGFloat)contentScale];
+    }
+NS_HANDLER
+NS_ENDHANDLER
+
+    [pool release];
+}
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetUIViewPixelScale0
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetUIViewPixelScale0
+  (JNIEnv *env, jclass unused, jlong view)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    UIView* v = (UIView*) ((intptr_t) view);
+    jfloat r = 0.0f;
+
+NS_DURING
+    if( NULL != v ) {
+        r = [v contentScaleFactor];
+    }
+NS_HANDLER
+NS_ENDHANDLER
+
+    [pool release];
+    return r;
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    SetCALayerPixelScale0
+ * Signature: (JJF)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_SetCALayerPixelScale0
+  (JNIEnv *env, jclass unused, jlong rootCALayer, jlong subCALayer, jfloat contentsScale)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    CALayer* rootLayer = (CALayer*) ((intptr_t) rootCALayer);
+    CALayer* subLayer = (CALayer*) ((intptr_t) subCALayer);
+
+    [CATransaction begin];
+    [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
+
+NS_DURING
+    if( NULL != rootLayer ) {
+        [rootLayer setContentsScale: (CGFloat)contentsScale];
+    }
+    if( NULL != subLayer ) {
+        [subLayer setContentsScale: (CGFloat)contentsScale];
+    }
+NS_HANDLER
+NS_ENDHANDLER
+
+    [CATransaction commit];
+
+    [pool release];
+}
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    GetCALayerPixelScale0
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetCALayerPixelScale0
+  (JNIEnv *env, jclass unused, jlong caLayer)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    CALayer* v = (CALayer*) ((intptr_t) caLayer);
+    jfloat r = 0.0f;
+
+NS_DURING
+    if( NULL != v ) {
+        r = [v contentsScale];
+    }
+NS_HANDLER
+NS_ENDHANDLER
+
+    [pool release];
+    return r;
+}
+
+@interface MainRunnable : NSObject
+
+{
+    jobject runnableObj;
+}
+
+- (id) initWithRunnable: (jobject)runnable;
+- (void) jRun;
+
+#ifdef DBG_LIFECYCLE
+- (id)retain;
+- (oneway void)release;
+- (void)dealloc;
+#endif
+
+
+@end
+
+@implementation MainRunnable
+
+- (id) initWithRunnable: (jobject)runnable
+{
+    runnableObj = runnable;
+    return [super init];
+}
+
+- (void) jRun
+{
+    int shallBeDetached = 0;
+    JNIEnv* env = NativewindowCommon_GetJNIEnv(1 /* asDaemon */, &shallBeDetached);
+    DBG_PRINT2("MainRunnable.1 env: %d\n", (int)(NULL!=env));
+    if(NULL!=env) {
+        DBG_PRINT2("MainRunnable.1.0\n");
+        (*env)->CallVoidMethod(env, runnableObj, runnableRunID);
+        DBG_PRINT2("MainRunnable.1.1\n");
+        (*env)->DeleteGlobalRef(env, runnableObj);
+
+        DBG_PRINT2("MainRunnable.1.3\n");
+        // detaching thread not required - daemon
+        // NativewindowCommon_ReleaseJNIEnv(shallBeDetached);
+    }
+    DBG_PRINT2("MainRunnable.X\n");
+}
+
+#ifdef DBG_LIFECYCLE
+
+- (id)retain
+{
+    DBG_PRINT2("MainRunnable::retain.0: %p (refcnt %d)\n", self, (int)[self retainCount]);
+    id o = [super retain];
+    DBG_PRINT2("MainRunnable::retain.X: %p (refcnt %d)\n", o, (int)[o retainCount]);
+    return o;
+}
+
+- (oneway void)release
+{
+    DBG_PRINT2("MainRunnable::release.0: %p (refcnt %d)\n", self, (int)[self retainCount]);
+    [super release];
+    // DBG_PRINT2("MainRunnable::release.X: %p (refcnt %d)\n", self, (int)[self retainCount]);
+}
+
+- (void)dealloc
+{
+    DBG_PRINT2("MainRunnable::dealloc.0 %p (refcnt %d)\n", self, (int)[self retainCount]);
+    [super dealloc];
+    // DBG_PRINT2("MainRunnable.dealloc.X: %p\n", self);
+}
+
+#endif
+
+@end
+
+// #define UIApp [UIApplication sharedApplication]
+// #define NSApp [NSApplication sharedApplication]
+
+static void RunOnThread (JNIEnv *env, jobject runnable, BOOL onMain, jint delayInMS)
+{
+    BOOL isMainThread = [NSThread isMainThread];
+    BOOL forkOnMain = onMain && ( NO == isMainThread || 0 < delayInMS );
+    // UIApplication * UIApp = [UIApplication sharedApplication];
+
+    DBG_PRINT2( "RunOnThread0: forkOnMain %d [onMain %d, delay %dms, isMainThread %d], UIApp %d, UIApp-isRunning %d\n", 
+        (int)forkOnMain, (int)onMain, (int)delayInMS, (int)isMainThread, (int)(NULL!=UIApp), (int)([UIApp applicationState]));
+
+    if ( forkOnMain ) {
+        jobject runnableObj = (*env)->NewGlobalRef(env, runnable);
+
+        DBG_PRINT2( "RunOnThread.1.0\n");
+        MainRunnable * mr = [[MainRunnable alloc] initWithRunnable: runnableObj];
+
+        if( onMain ) {
+            [mr performSelectorOnMainThread:@selector(jRun) withObject:nil waitUntilDone:NO];
+        } else {
+            NSTimeInterval delay = (double)delayInMS/1000.0;
+            [mr performSelector:@selector(jRun) withObject:nil afterDelay:delay];
+        }
+        DBG_PRINT2( "RunOnThread.1.1\n");
+
+        [mr release];
+        DBG_PRINT2( "RunOnThread.1.2\n");
+
+    } else {
+        DBG_PRINT2( "RunOnThread.2\n");
+        (*env)->CallVoidMethod(env, runnable, runnableRunID);
+    }
+    DBG_PRINT2( "RunOnThread.X\n");
+}
+
+static void IOSUtil_KickUIApp() {
+    // UIApplication * UIApp = [UIApplication sharedApplication];
+    /*** iOS-FIXME: UIEvent creation and post n/a !!!
+    UIEvent* event = [UIEvent otherEventWithType: UIApplicationDefined
+                                        location: NSMakePoint(0,0)
+                                   modifierFlags: 0
+                                       timestamp: 0.0
+                                    windowNumber: 0
+                                         context: nil
+                                         subtype: 0
+                                           data1: 0
+                                           data2: 0];
+    [UIApp postEvent: event atStart: true];
+    */
+}
+
+/**
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    RunOnMainThread0
+ * Signature: (ZLjava/lang/Runnable;)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_RunOnMainThread0
+  (JNIEnv *env, jclass unused, jboolean kickUIApp, jobject runnable)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    RunOnThread (env, runnable, YES, 0);
+    if( kickUIApp ) {
+        IOSUtil_KickUIApp();
+    }
+    [pool release];
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    RunLater0
+ * Signature: (ZZLjava/lang/Runnable;I)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_RunLater0
+  (JNIEnv *env, jclass unused, jboolean onMain, jboolean kickUIApp, jobject runnable, jint delay)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    RunOnThread (env, runnable, onMain ? YES : NO, delay);
+    if( kickUIApp ) {
+        IOSUtil_KickUIApp();
+    }
+    [pool release];
+}
+
+/*
+ * Class:     Java_jogamp_nativewindow_ios_IOSUtil
+ * Method:    IsMainThread0
+ * Signature: (V)Z
+ */
+JNIEXPORT jboolean JNICALL Java_jogamp_nativewindow_ios_IOSUtil_IsMainThread0
+  (JNIEnv *env, jclass unused)
+{
+    return ( [NSThread isMainThread] == YES ) ? JNI_TRUE : JNI_FALSE ;
+}
+
+#define EAGL_TEST 1
+
+#ifdef EAGL_TEST
+#include <OpenGLES/ES2/gl.h>
+#include <OpenGLES/ES2/glext.h>
+
+@interface GLView : UIView
+{    
+    CAEAGLLayer *glLayer;
+    EAGLContext *glContext;
+    GLuint renderbuffer;
+}
+@end
+@implementation GLView
++ (Class)layerClass
+{
+    return [CAEAGLLayer class];
+}
+
+- (id)initWithFrame:(CGRect)frame
+{
+    if (self = [super initWithFrame:frame]) {
+        [self initGL];
+        [self render];
+    }
+    
+    return self;
+}
+
+- (void)render
+{
+    glClearColor(150.0/255.0, 200.0/255.0, 255.0/255.0, 1.0);
+    
+    glClear(GL_COLOR_BUFFER_BIT);
+    
+    [glContext presentRenderbuffer:GL_RENDERBUFFER];
+}
+
+- (void)initGL
+{    
+    glLayer = (CAEAGLLayer *)self.layer;
+    glLayer.opaque = YES;
+
+    glContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
+    if (!glContext) {
+        NSLog(@"Unable to create EAGLContext");
+        exit(1);
+    }
+    if (![EAGLContext setCurrentContext:glContext]) {
+        NSLog(@"Unable to set current EAGLContext");
+        exit(1);
+    }
+    glGenRenderbuffers(1, &renderbuffer);
+    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
+    [glContext renderbufferStorage:GL_RENDERBUFFER fromDrawable:glLayer];
+
+    GLuint framebuffer;
+    glGenFramebuffers(1, &framebuffer);
+    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, renderbuffer);
+}
+@end
+#endif /* EAGL_TEST */
+
+JNIEXPORT void JNICALL Java_jogamp_nativewindow_ios_IOSUtil_CreateGLViewDemoA0
+  (JNIEnv *env, jclass unused)
+{
+#ifdef EAGL_TEST
+    CGRect boundsW2 = CGRectMake(500, 10, 320, 320);
+    CGRect boundsV2 = CGRectMake(0, 0, 320, 320);
+    UIWindow* window2 = [[[[UIWindow alloc] initWithFrame:boundsW2] autorelease] retain];
+    window2.rootViewController = [[[UIViewController alloc] initWithNibName:nil bundle:nil] autorelease];
+    [window2 setBackgroundColor: [UIColor redColor]];
+    [window2 makeKeyAndVisible];
+
+    GLView *glView = [[GLView alloc] initWithFrame:boundsV2];
+    [window2 addSubview:glView];
+#endif /* EAGL_TEST */
+}
+
diff --git a/src/nativewindow/native/ios/NativeWindowProtocols.h b/src/nativewindow/native/ios/NativeWindowProtocols.h
new file mode 100644
index 000000000..b27afc70d
--- /dev/null
+++ b/src/nativewindow/native/ios/NativeWindowProtocols.h
@@ -0,0 +1,59 @@
+/**
+ * Copyright 2019 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+#ifndef NATIVEWINDOWPROTOCOLS_H
+#define NATIVEWINDOWPROTOCOLS_H 1
+ 
+/** 
+ * CALayer size needs to be set using the AWT component size. 
+ * See detailed description in JAWTUtil.java and sync w/ changed. 
+ */
+#define NW_DEDICATEDFRAME_QUIRK_SIZE      ( 1 << 0 )
+
+/** 
+ * CALayer position needs to be set to zero.
+ * See detailed description in JAWTUtil.java and sync w/ changed. 
+ */
+#define NW_DEDICATEDFRAME_QUIRK_POSITION  ( 1 << 1 )
+
+/** 
+ * CALayer position needs to be derived from AWT position.
+ * in relation to super CALayer.
+ * See detailed description in JAWTUtil.java and sync w/ changed.
+ */
+#define NW_DEDICATEDFRAME_QUIRK_LAYOUT ( 1 << 2 )
+
+// n/a iOS #import <Foundation/NSGeometry.h> 
+#import <UIKit/UIGeometry.h> 
+
+@protocol NWDedicatedFrame
+- (void)setDedicatedFrame:(CGRect)dFrame quirks:(int)quirks;
+@end
+
+#endif /* NATIVEWINDOWPROTOCOLS_H_ */
+
diff --git a/src/nativewindow/native/macosx/OSXmisc.m b/src/nativewindow/native/macosx/OSXmisc.m
index c04ba786e..fb15c43b9 100644
--- a/src/nativewindow/native/macosx/OSXmisc.m
+++ b/src/nativewindow/native/macosx/OSXmisc.m
@@ -81,41 +81,41 @@ Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0(JNIEnv *env, jclass _unused) {
         jclass c;
         c = (*env)->FindClass(env, ClazzNamePoint);
         if(NULL==c) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't find %s", ClazzNamePoint);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't find %s", ClazzNamePoint);
         }
         pointClz = (jclass)(*env)->NewGlobalRef(env, c);
         (*env)->DeleteLocalRef(env, c);
         if(NULL==pointClz) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't use %s", ClazzNamePoint);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't use %s", ClazzNamePoint);
         }
         pointCstr = (*env)->GetMethodID(env, pointClz, ClazzAnyCstrName, ClazzNamePointCstrSignature);
         if(NULL==pointCstr) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't fetch %s.%s %s",
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't fetch %s.%s %s",
                 ClazzNamePoint, ClazzAnyCstrName, ClazzNamePointCstrSignature);
         }
 
         c = (*env)->FindClass(env, ClazzNameInsets);
         if(NULL==c) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't find %s", ClazzNameInsets);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't find %s", ClazzNameInsets);
         }
         insetsClz = (jclass)(*env)->NewGlobalRef(env, c);
         (*env)->DeleteLocalRef(env, c);
         if(NULL==insetsClz) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't use %s", ClazzNameInsets);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't use %s", ClazzNameInsets);
         }
         insetsCstr = (*env)->GetMethodID(env, insetsClz, ClazzAnyCstrName, ClazzNameInsetsCstrSignature);
         if(NULL==insetsCstr) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't fetch %s.%s %s",
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't fetch %s.%s %s",
                 ClazzNameInsets, ClazzAnyCstrName, ClazzNameInsetsCstrSignature);
         }
 
         c = (*env)->FindClass(env, ClazzNameRunnable);
         if(NULL==c) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't find %s", ClazzNameRunnable);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't find %s", ClazzNameRunnable);
         }
         runnableRunID = (*env)->GetMethodID(env, c, "run", "()V");
         if(NULL==runnableRunID) {
-            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_newt_driver_macosx_MacWindow_initIDs0: can't fetch %s.run()V", ClazzNameRunnable);
+            NativewindowCommon_FatalError(env, "FatalError Java_jogamp_nativewindow_macosx_OSXUtil_initIDs0: can't fetch %s.run()V", ClazzNameRunnable);
         }
     }
     return JNI_TRUE;