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, 43 insertions, 0 deletions

diff --git a/make/config/jogl/eagl-ios.cfg b/make/config/jogl/eagl-ios.cfg
new file mode 100644
index 000000000..2714cb6a3
--- /dev/null
+++ b/make/config/jogl/eagl-ios.cfg
@@ -0,0 +1,43 @@
+# This .cfg file is used to generate the interface to the CGL routines
+# used internally by the MacOSXGLContext implementation.
+JavaOutputDir gensrc/classes
+NativeOutputDir gensrc/native/jogl/iOS
+
+# For easier debugging of GLSemHeader, i.e. less debug output
+#DropAllGLDocHeader true
+
+Package jogamp.opengl.ios.eagl
+JavaClass EAGL
+Style AllStatic
+Include gl-common.cfg
+Include gl-common-extensions.cfg
+Include gl-desktop.cfg
+
+# Only NIO direct function, no arrays ..
+NIOOnly __ALL__
+NIODirectOnly __ALL__
+
+GLSemHeader OpenGLES/EAGL.h
+
+Opaque long void *
+
+# Opaque directives for low-level CGL binding (for Java2D/JOGL bridge)
+Opaque long EAGLContext *
+Opaque long EAGLSharegroup *
+Opaque long EAGLDrawable *
+
+Opaque long CALayer *
+Opaque long CAEAGLLayer *
+Opaque long UIView *
+
+CustomCCode #include <machine/types.h>
+CustomCCode #include "ios-window-system.h"
+
+#IncludeAs CustomJavaCode EAGL eagl-ios-CustomJavaCode.java
+
+# Implement the first argument to getProcAddress as String instead
+# of byte[]
+ArgumentIsString getProcAddress 0
+
+Import com.jogamp.common.util.Function
+Import jogamp.nativewindow.ios.IOSUtil