d using the same eight symbolic constants as <em class="parameter"><code>sfail</code></em>.
            Note that <em class="parameter"><code>dpfail</code></em> is ignored when there is no depth buffer,
            or when the depth buffer is not enabled.
            In these cases, <em class="parameter"><code>sfail</code></em> and <em class="parameter"><code>dppass</code></em> specify stencil action when the
            stencil test fails and passes,
            respectively.
        </p></div><div class="