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, 87 insertions, 0 deletions

diff --git a/src/jogl/classes/jogamp/opengl/ios/eagl/IOSEAGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/ios/eagl/IOSEAGLGraphicsConfigurationFactory.java
new file mode 100644
index 000000000..3a4f1a354
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/ios/eagl/IOSEAGLGraphicsConfigurationFactory.java
@@ -0,0 +1,87 @@
+/**
+ * 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.opengl.ios.eagl;
+
+import jogamp.opengl.GLGraphicsConfigurationFactory;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+
+import com.jogamp.nativewindow.AbstractGraphicsConfiguration;
+import com.jogamp.nativewindow.AbstractGraphicsDevice;
+import com.jogamp.nativewindow.AbstractGraphicsScreen;
+import com.jogamp.nativewindow.CapabilitiesChooser;
+import com.jogamp.nativewindow.CapabilitiesImmutable;
+import com.jogamp.nativewindow.GraphicsConfigurationFactory;
+import com.jogamp.opengl.GLCapabilitiesChooser;
+import com.jogamp.opengl.GLCapabilitiesImmutable;
+import com.jogamp.opengl.GLDrawableFactory;
+
+
+public class IOSEAGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
+    static void registerFactory() {
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.ios.IOSGraphicsDevice.class, GLCapabilitiesImmutable.class, new IOSEAGLGraphicsConfigurationFactory());
+    }
+    private IOSEAGLGraphicsConfigurationFactory() {
+    }
+
+    @Override
+    protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
+            final CapabilitiesImmutable capsChosen, final CapabilitiesImmutable capsRequested,
+            final CapabilitiesChooser chooser, final AbstractGraphicsScreen absScreen, final int nativeVisualID) {
+
+        if (absScreen == null) {
+            throw new IllegalArgumentException("AbstractGraphicsScreen is null");
+        }
+
+        if (! (capsChosen instanceof GLCapabilitiesImmutable) ) {
+            throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - chosen");
+        }
+
+        if (! (capsRequested instanceof GLCapabilitiesImmutable) ) {
+            throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - requested");
+        }
+
+        if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
+            throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
+        }
+
+        return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, (GLCapabilitiesChooser)chooser, absScreen, false);
+    }
+
+    static IOSEAGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
+                                                                            final GLCapabilitiesImmutable capsRequested,
+                                                                            final GLCapabilitiesChooser chooser,
+                                                                            final AbstractGraphicsScreen absScreen, final boolean usePBuffer) {
+        if (absScreen == null) {
+            throw new IllegalArgumentException("AbstractGraphicsScreen is null");
+        }
+        final AbstractGraphicsDevice device = absScreen.getDevice();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLDrawableFactory.getDesktopFactory(), device);
+
+        return new IOSEAGLGraphicsConfiguration(absScreen, capsChosen, capsRequested);
+    }
+}