Requesting assistance for LSAGLView error in Camera Kit IOS app?

AliveNow Creative Tech

Hi All, We are working on a Camera Kit SDK IOS sample. We are able to run the GitHub repository IOS sample successfully. We are now integrating the Camera Kit into a new app and we are facing the following errors:

Backtrace:

[error] Error, [LSAGLView::drawTexture] LS::Exception : [LSAGLView] attempt to use deleted framebuffer

Can anyone please help me out with this error?

Thank you.

stevenxu

@AliveNow Creative Tech Thanks for posting here. Submitted a ticket for our iOS eng team to look into this for you.

In the meantime, what SDK version are you using and what device model are you testing it on (if it applies)?

Steven

arashp

Hi @AliveNow Creative Tech, thank you for reporting the issue. I don't think we have seen this before. We can't reproduce it on our side at the moment and without that we are unable offer a solution.

Along with the details that @stevenxu mentioned, would you be able to send us a small project or steps to reproduce the issue? If it's a small project, it can be uploaded through our support form.

AliveNow Creative Tech

Hi @stevenxu and @arashp, Thank you so much for the response.

I am using the Camera Kit SDK version 1.18.1 and tested the app on iPhone 13.

@arashp, Below are the steps that I am following to integrate Camera Kit into a new app.

1. Added and installed all the pods mentioned in this link (https://docs.snap.com/snap-kit/camera-kit/guides/quick-start/integrate-sdk/integrate-sdk-app/ios#adding-the-sdk)
2. Copied all the AppDelegate functions from the GitHub repository IOS sample and added them into a new project AppDelegte.

When I build and run the app into a device it was asking the camera and microphone permissions after that it gives me a black screen.

In the console it shows the below error, please check:

Backtrace:
[error] Error, [LSAGLView::drawTexture] LS::Exception : [LSAGLView] attempt to use deleted framebuffer

Can you please help me out with this?

Thank you.

arashp

Hi @AliveNow Creative Tech, thanks very much for those repro steps. There are basically two pieces for a very basic integration: the functions in the AppDelegate and values in info.plist.

Have you copied over the info.plist from the sample app in its entirety? Some setting there might be preventing your camera from starting, in which case Camera Kit does not have any frames to process, resulting in the error you see.

If you have both pieces and the app is building and running, then the integration should work. Please let us know if that is still not the case.

AliveNow Creative Tech

Hi @arashp, Thank you so much for your response. I was able to integrate the Camera Kit into a new IOS app based on your suggestions but I am not able to see the top-right icons.

Please check the screenshot that I have attached:

Is there any setting that I am missing? Can you please help me out with this?

Thank you.

arashp

Hi @AliveNow Creative Tech, That's great that you were able to integrate the SDK. But it is strange that you were still missing those icons. That element is CameraActionsView. It should be displayed automatically by ReferenceUI.

Could you put a breakpoint in CameraActionsView.getter:flipCameraButton and see if you ever hit it?

AliveNow Creative Tech

Hi @arashp, The breakpoint hits when I put at flipCameraButton. I have tried adding a .png extension to an image name but still, the icons are missing.

I am attaching the breakpoint screenshot, please check:

The button actions are working fine only icons are missing.

Can you please help me out with this?

Thank you.

AliveNow Creative Tech

@arashp, Also one more help from your side

How can I close the Camera Kit View when I click the button so that it can redirect to the ViewController? (i.e Main Storyboard)

I have tried changing the rootViewController from cameraViewController to a ViewController and tried to stop AVCaptureSession but still, the Camera Kit view has not stopped.

My scenario is when I click the button from ViewController it has to load the Camera Kit view and when I click the back button from Camera Kit view it has to go to ViewController.

Can you please help me out with this?

Thank you.

arashp

Thank you and sorry for the delay @AliveNow Creative Tech. That's great that flipCameraButton() is getting called. What happens when you "step over" the code in Xcode and reach line 15 button.setImage()? Does the button have an image on it?

If the button doesn't have an image, it means either your project doesn't have the ck_camera_flip image or the link to it is incorrect on line 16.

arashp

Thanks for starting a new thread on the CameraView question. I posted a reply there.

arashp

A quick note on the original error:
[error] Error, [LSAGLView::drawTexture] LS::Exception : [LSAGLView] attempt to use deleted framebuffer

As mentioned this was due to a difference in info.plist. Investigating this further, removing the key Scene Configuration from info.plist should resolve the issue. This key is added to any fresh app project in iOS but it is absent from the iOS sample app.

arashp

To avoid this confusion in the future, the team is investigating a fix with migrating the CameraKit setup from the AppDelegate to the SceneDelegate.