cremented,
            values are clamped to 0 and
            <math overflow="scroll">

                <mrow>
                    <msup><mn>2</mn>
                    <mi mathvariant="italic">n</mi>
                    </msup>
                    <mo>-</mo>
                    <mn>1</mn>
                </mrow>
            </math>,
            where
            <math overflow="scroll"><mi mathvariant="italic">n</mi></math>
            is the value returned by querying <code class="constant">GL_STENCIL_BIT