Add PICO OS Immersive Mode

[picoxr]

Add PICO OS support for the XR preview mode.

When previewing XR projects in Godot Engine running on PICO Headsets (PICO 4 Ultra, PICO 4), the preview mode stays in 2D- windowed mode and does not enter the immersive mode.

This commit enables previewing XR applications in immersive mode on PICO Headsets.

[BastiaanOlij]

This looks great to me! Just want to get @m4gr3d approval as well as the expert on the Android build setup.

[m4gr3d]

This looks great! Looking forward to having the XR Editor running on a second platform!

[akien-mga]

Thanks! And congrats for your first merged Godot contribution 🎉

[dsnopek]

This is already merged, but I was finally just able to test it on the Pico 4 Ultra.

Seems to work great! I'm able to launch an XR project, go into immersive mode, and then quit it to return to the Godot editor.

There are some little issues that I noticed: for example, the "Quit to Project List" option doesn't seem to work, the Godot editor just exits. And if I run a 2D project, it will open it in a panel and work fine, but when I close that panel it doesn't take me back to the editor - I have to launch Godot again.

But if those represent Godot issues (and not issues in the Pico OS), we can do follow-up PRs for them :-)

Thanks!

[BastiaanOlij]

I finally had a moment to test as well. David I'm assuming you tested on a Pico 4 Ultra? I tested it on my Pico 4.

Similar experience, seems to work like a charm. I only couldn't return to the editor after launching the game.

Also I couldn't have the editor open while the game was running though I think this is due to a few things we can only enable once the editor is in the PICO store (if I understood correctly from conversations I had).

Other small interface things I think are mostly Godot or PicoOS things, not related to this PR.
One we may need to look into is that the project manager seems to default to a file location that isn't accessible in PicoOS. I had to create a subfolder within Godots user folder (I think).

[m4gr3d]

One we may need to look into is that the project manager seems to default to a file location that isn't accessible in PicoOS. I had to create a subfolder within Godots user folder (I think).

The editor usually pops out a permission screen the first time it's launched in order to request the MANAGE_EXTERNAL_STORAGE permission. @dsnopek @BastiaanOlij Did the permission request show up for you when you launch it?

And if I run a 2D project, it will open it in a panel and work fine, but when I close that panel it doesn't take me back to the editor - I have to launch Godot again.

@dsnopek Does the panel open in the same window, or in a separate window?

[BastiaanOlij]

@m4gr3d I was just able to test on my new Pico 4 Ultra, and it works correctly there.

I haven't tried running a 2D app, only an XR app and that works better on the PICO 4 Ultra as well.

[dsnopek]

David I'm assuming you tested on a Pico 4 Ultra?

Yep!

One we may need to look into is that the project manager seems to default to a file location that isn't accessible in PicoOS. I had to create a subfolder within Godots user folder (I think).

The editor usually pops out a permission screen the first time it's launched in order to request the MANAGE_EXTERNAL_STORAGE permission. @dsnopek @BastiaanOlij Did the permission request show up for you when you launch it?

I don't recall seeing the permission request, but it's possible it appeared and I just immediately accepted it. :-) I didn't have the problem that Bastiaan had - the default directory that the project manager uses worked fine for me. I was able to pull projects from the asset library into there and they ran fine.

@dsnopek Does the panel open in the same window, or in a separate window?

It appears like the game replaces the editor within the same window. If I click on the Godot Editor app on the toolbar, it just hides/shows the game. And then the only thing I can do is close the panel, which quits the game, and the editor is long gone (I suspect it quit as soon as I started the game?)