How does the CardboardView class in the Google Cardboard SDK select which OpenGL ES version to use? I was hoping that it literally inherited from GlSurfaceView so that I could use setEGLContextClientVersion as described here, but it looks like that's not the case.
My goal is to select OpenGL ES 3.0 -- much of my existing rendering code is implemented on the native side and depends on that version.
The Cardboard SDK uses an OpenGL ES 2.0 compatible client. Though this doesn't seem to be officially supported, my experience is that GL ES 3.0/3.1 can be used with such a context, provided that the phone actually supports ES 3.x. Which can be checked with this call:
String version = javax.microedition.khronos.opengles.GL10.glGetString(
GL10.GL_VERSION);
More detail at http://developer.android.com/guide/topics/graphics/opengl.html#version-check
That said, it looks like we should add proper support for using ES 3.x with the SDK, thanks for flagging this.