isSessionSupported('immersive-vr') got false in molvic but true in FirefoxReality

[lcgao]

Hi, anyone has solution for this issue?

1. Use the latest code and build with flavor noapiArm64Debug.
2. Access website: https://immersive-web.github.io/webxr-samples/.
3. Show ❌ - VR support not detected.
4. But it works on Firefox Reality browser.

Thanks!

[svillar]

Noapi flavour precisely means that no XR api is used, and thus no XR session could be created.

[lcgao]

Thanks but Firefox Reality also build with noapi flavour and created VR session. So what should I do if I want to have the same effect as Firefox Reality in Wolvic? Thank you in advance.

[lcgao]

Hi, I went through all the commits and found commit #70 and #145 make this situation.

I would like to know how to create a XR session with my own XR device in a new flavor, please advice.
Thanks a lot!

[svillar]

Hi, I went through all the commits and found commit #70 and #145 make this situation.

I would like to know how to create a XR session with my own XR device in a new flavor, please advice. Thanks a lot!

That's because in #70 we changed the protocol to talk to Gecko. See #210 (comment)

[lcgao]

OK, so I just need to use the branch wolvic_release instead, right?

[svillar]

OK, so I just need to use the branch wolvic_release instead, right?

Correct. We're currently evaluating reverting #70 because in the end it didn't work as expected and seems to be causing major disruptions for potential new contributors.

[lcgao]

OK, this is great! Actually I did the revert-operation in our own Wolvic for this issue.
Anyway it would be better if Wolvic official do a fix (integrate new Gecko or revert #70), expecting it.

Thanks.

[lcgao]

Please also check commit 24902f1.
I think VRBrowser::InitializeJava() should be called before VRBrowser::RegisterExternalContext() because the latter is a function that calls Java method. Otherwise, ValidateStaticMethodID() may return false with error message "JNI::%s failed. Java not initialized."

[svillar]

Please also check commit 24902f1.
I think VRBrowser::InitializeJava() should be called before VRBrowser::RegisterExternalContext() because the latter is a function that calls Java method. Otherwise, ValidateStaticMethodID() may return false with error message "JNI::%s failed. Java not initialized."

yeah we know about that. However that InitializeJava is a bit missleading because it does not initialize java but just attach java resources to the new render thread. The JNI call required by RegisterExternalContext can be called anyway.

[lcgao]

But actually this does cause isSessionSupported('immersive-vr') returning false.

[svillar]

But actually this does cause isSessionSupported('immersive-vr') returning false.

That should not be the cause. That call only returns false (using Gecko) whenever the XR library is not able to list the available devices.

[DavidChen528]

@lcgao ，Hi，Have you solved this problem yet?