Switching between ARSession and WebCamTexture causes OpenGL errors?

nstrolight-sem · Feb 11, 2019

** EDIT: the issue is not caused by ARFoundation, leaving original post up for reference **

Hi,

I am interested in letting the user go back and forth between two separate screens - one for an AR mode, and one for a simple front-facing camera mode where you can capture photos. I am using the ARFoundation plugin and testing on Android. During the switch out of AR mode, I disable the session and start up a new WebCamTexture on the opposite camera. This leads to a bunch of this error appearing in the debug and logcat repeatedly:

***** E/Unity: OPENGL NATIVE PLUG-IN ERROR: GL_INVALID_OPERATION: Operation illegal in current state

(Filename: /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/opengles/GfxDeviceGLES.cpp Line: 340)

As well, empty textures are being overridden with the current WebCamTexture. Capturing photos results in a black photo being saved to the camera roll, and renderers without a texture assigned get overridden with the WebCamTexture.

During the switch into AR mode, I disable the WebCamTexture code and objects, and restart the AR session. When this occurs, the session just goes black and gets itself stuck on SessionInitializing state.

Is there a fix for this? Thanks!
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Switching between ARSession and WebCamTexture causes OpenGL errors?

nstrolight-sem