[osx] [metal] [docking] ImGui window become dark outside of main windows and lot of error on the console

[DridriLaBastos]

Hi, I am trying to add ImGui to my application (the docking branch) and I have a problem: I am able to run the osx + metal example, but if I move any of the ImGui windows outside of the native osx window: the ImGui window become all dark and I have a lot of error messages in the console :

The messages stop appearing as soon as the ImGui window returns to the native window.
I have a MacBook pro from late 2013 with macOS 11.7 (thus it is compatible with metal).

I copy pasted all the code from the example folder for osx + metal and I changed the main function to create a window by hand :

@autoreleasepool {
		[NSApplication sharedApplication];
		[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
		AppDelegate* appDelegate = [[AppDelegate alloc] init];

		[NSApp setDelegate:appDelegate];
		[NSApp activateIgnoringOtherApps:YES];
		[NSApp run];
	}

When stepping through the code I found that there is also an error at the initialization inside the AppViewController : when stepping through the call to MTLCreateSystemDefaultDevice() I have two errors that appear in the console (the last two lines):

The thing is: the device returned is not null but well populated with information data :

I tried to launch the example with the xcode project and it worked well. But for my app I need everything to be in c++. My question is what am I doing wrong?

Also, I tried the example with GLFW + metal, and I had the same error messages