Is gl_FragData supported on any SGXs

I saw Gordon's reply to this post:, (that the stencil buffer cannot be used for arbitrary values) but it's not clear if the stencil buffer can be used straight-up from a fragment shader via gl_FragData (to read/write reference values that you'd otherwise send through glStencilFunc). Anyone know?

Hi doctor_fransk,

there is no facility in OGLES2 to read or write stencil values in the fragment shader.