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.

1 files changed, 66 insertions, 0 deletions

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 */