NEWT iOS: Support translucent windows

and remove the redColor default background (debug only).

IOSUtil.CreateUIWindow(..) also gets its 'visible' attribute,
to be true only for demo Hello1 code - false for intended Proxy Surface Hook.

6 files changed, 46 insertions, 14 deletions

diff --git a/src/demos/com/jogamp/opengl/demos/ios/Hello.java b/src/demos/com/jogamp/opengl/demos/ios/Hello.java
index 378868bea..5750c7b90 100644
--- a/src/demos/com/jogamp/opengl/demos/ios/Hello.java
+++ b/src/demos/com/jogamp/opengl/demos/ios/Hello.java
@@ -67,6 +67,7 @@ public class Hello {
         int secondsDuration = 10; // 10s
         int width = 832, height = 480; // ipad pro 11: 2388x1668 px (scale: 2)
         int fboDepthBits = -1; // CAEAGLLayer fails with depth 16 + 24 in Simulation; -1 means don't change
+        boolean translucent = false;
         boolean exitJVM = false;
         String demoName = "com.jogamp.opengl.demos.es2.GearsES2";
         for(int i=0; i<args.length; i++) {
@@ -85,6 +86,8 @@ public class Hello {
                 reqSurfacePixelScale[1] = reqSurfacePixelScale[0];
             } else if(args[i].equals("-seconds") && i+1<args.length) {
                 secondsDuration = parseInt(args[++i], secondsDuration);
+            } else if(args[i].equals("-translucent")) {
+                translucent = true;
             } else {
                 System.err.println("ignoring arg["+i+"]: "+args[i]);
             }
@@ -131,6 +134,7 @@ public class Hello {
             if( 0 <= fboDepthBits) {
                 reqCaps.setDepthBits(fboDepthBits);
             }
+            reqCaps.setBackgroundOpaque(!translucent);
             System.out.println("Requested GL Caps: "+reqCaps);
 
             // 2) Create newt native window
diff --git a/src/demos/com/jogamp/opengl/demos/ios/Hello1.java b/src/demos/com/jogamp/opengl/demos/ios/Hello1.java
index e0c3be871..5dc7b14a2 100644
--- a/src/demos/com/jogamp/opengl/demos/ios/Hello1.java
+++ b/src/demos/com/jogamp/opengl/demos/ios/Hello1.java
@@ -117,7 +117,7 @@ public class Hello1 {
         System.err.println("");
 
         GLAutoDrawableDelegate glad = null;
-        final long uiWindow = IOSUtil.CreateUIWindow(0, 0, width, height);
+        final long uiWindow = IOSUtil.CreateUIWindow(0, 0, width, height, true);
         try {
             // 1) Config ..
             final GLProfile glp = GLProfile.getGL2ES2();
diff --git a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java
index a61287f8b..079f6c5a8 100644
--- a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java
+++ b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSDummyUpstreamSurfaceHook.java
@@ -53,7 +53,7 @@ public class IOSDummyUpstreamSurfaceHook extends UpstreamSurfaceHookMutableSize
     @Override
     public final void create(final ProxySurface s) {
         if(0 == uiWindow && 0 == s.getSurfaceHandle()) {
-            uiWindow = IOSUtil.CreateUIWindow(0, 0, 64, 64);
+            uiWindow = IOSUtil.CreateUIWindow(0, 0, 64, 64, false);
             if(0 == uiWindow) {
                 throw new NativeWindowException("Error UI window 0");
             }
diff --git a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java
index 7100cb0b5..4790f21da 100644
--- a/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java
+++ b/src/nativewindow/classes/jogamp/nativewindow/ios/IOSUtil.java
@@ -130,12 +130,12 @@ public class IOSUtil implements ToolkitProperties {
       }
     }
 
-    public static long CreateUIWindow(final int x, final int y, final int width, final int height) {
+    public static long CreateUIWindow(final int x, final int y, final int width, final int height, final boolean visible) {
       final long res[] = { 0 };
       RunOnMainThread(true, false /* kickNSApp */, new Runnable() {
           @Override
           public void run() {
-              res[0] = CreateUIWindow0(x, y, width, height);
+              res[0] = CreateUIWindow0(x, y, width, height, visible);
           } } );
       return res[0];
     }
@@ -312,7 +312,7 @@ public class IOSUtil implements ToolkitProperties {
     private static native Object GetInsets0(long windowOrView);
     private static native float GetScreenPixelScale1(int screenIdx);
     private static native float GetScreenPixelScale2(long windowOrView);
-    private static native long CreateUIWindow0(int x, int y, int width, int height);
+    private static native long CreateUIWindow0(int x, int y, int width, int height, boolean visible);
     private static native void DestroyUIWindow0(long uiWindow);
     private static native long GetCALayer0(long uiView);
     private static native long GetCAEAGLLayer0(long uiView);
diff --git a/src/nativewindow/native/ios/IOSmisc.m b/src/nativewindow/native/ios/IOSmisc.m
index 1983143df..9a1bbfd7f 100644
--- a/src/nativewindow/native/ios/IOSmisc.m
+++ b/src/nativewindow/native/ios/IOSmisc.m
@@ -315,7 +315,7 @@ JNIEXPORT jfloat JNICALL Java_jogamp_nativewindow_ios_IOSUtil_GetScreenPixelScal
  * Signature: (IIIIZ)J
  */
 JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_CreateUIWindow0
-  (JNIEnv *env, jclass unused, jint x, jint y, jint width, jint height)
+  (JNIEnv *env, jclass unused, jint x, jint y, jint width, jint height, jboolean visible)
 {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
     [CATransaction begin];
@@ -325,22 +325,33 @@ JNIEXPORT jlong JNICALL Java_jogamp_nativewindow_ios_IOSUtil_CreateUIWindow0
     // Allocate the window
     UIWindow *myWindow = [[[[UIWindow alloc] initWithFrame:boundsWin] autorelease] retain];
     myWindow.rootViewController = [[[UIViewController alloc] initWithNibName:nil bundle:nil] autorelease];
+#ifdef VERBOSE_ON
     [myWindow setBackgroundColor: [UIColor redColor]];
+#endif
 
     // 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];
-
+    if( visible) {
+        [myWindow setOpaque: YES];
+        [myWindow makeKeyAndVisible];
+    } else {
+        [myWindow setOpaque: NO];
+        [myWindow setBackgroundColor: [UIColor clearColor]];
+    }
     CAEAGLUIView *uiView = [[CAEAGLUIView alloc] initWithFrame:boundsView];
     CAEAGLLayer* l = (CAEAGLLayer*)[uiView layer];
-    [l setOpaque: YES];
+    if( visible ) {
+        [uiView setOpaque: YES];
+        [l setOpaque: YES];
+    } else {
+        [uiView setOpaque: NO];
+        [uiView setBackgroundColor: [UIColor clearColor]];
+        [l setOpaque: NO];
+        [l setBackgroundColor: [UIColor clearColor]];
+    }
     l.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: /* defaults */
                            [NSNumber numberWithBool:NO], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil];
 
-
     [myWindow addSubview: uiView];
 
     [CATransaction commit];
diff --git a/src/newt/native/IOSWindow.m b/src/newt/native/IOSWindow.m
index 4e3bd5479..b953c3146 100644
--- a/src/newt/native/IOSWindow.m
+++ b/src/newt/native/IOSWindow.m
@@ -517,7 +517,15 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_ios_WindowDriver_createWindow1
                                                backing: 0 // TODO (NSBackingStoreType) bufferingType
                                                defer: YES
                                                isFullscreenWindow: fullscreen] autorelease] retain];
-    [myWindow setBackgroundColor: [UIColor redColor]];
+    if(opaque) {
+        [myWindow setOpaque: YES];
+#ifdef VERBOSE_ON
+        [myWindow setBackgroundColor: [UIColor redColor]];
+#endif
+    } else {
+        [myWindow setOpaque: NO];
+        [myWindow setBackgroundColor: [UIColor clearColor]];
+    }
     if( visible ) {
         // Only if calling this before adding the view, the view receives touch events.
         // Another 'funny' iOS API nightmare?
@@ -530,6 +538,15 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_ios_WindowDriver_createWindow1
         myView = [[NewtUIView alloc] initWithFrame: rectView] ;
     }
     CAEAGLLayer* l = (CAEAGLLayer*)[myView layer];
+    if(opaque) {
+        [myView setOpaque: YES];
+        [l setOpaque: YES];
+    } else {
+        [myView setOpaque: NO];
+        [myView setBackgroundColor: [UIColor clearColor]];
+        [l setOpaque: NO];
+        [l setBackgroundColor: [UIColor clearColor]];
+    }
     DBG_PRINT_CREATEWIN1(2);
 
     changeContentView(env, jthis, parentView, myWindow, myView, NO);