Are OpenGLES2.0 android devices guaranteed to support stencil buffer?
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Are OpenGLES2.0 android devices guaranteed to support at least some number (>0) of stencil buffer bits?

I'm seeing mixed messages. Stencil testing is mentioned in the specification, and the various stencil functions are listed in the man pages, so I thought this would imply it is part of the core api.

I also see that several stencil formats `GL_OES_STENCIL[148]` are listed as extensions, so I'm not sure if this means that phones which claim 'support' for OpenGLES2.0 are required to support stencil buffers, or if they are optional extensions?

I've also read in a few places that some android phones do not support the stencil buffer, though I didn't see what version of OpenGLES they were referring to.

