code> or
            <code class="constant">GL_STENCIL_BUFFER_BIT</code>, no data is transferred and a <code class="constant">GL_INVALID_OPERATION</code> error is generated.
        </p><p>
            If <em class="parameter"><code>filter</code></em> is <code class="constant">GL_LINEAR</code> and the source rectangle would require sampling outside the bounds of
            the source framebuffer, values are read as if the <code class="constant">GL_CLAMP_TO_EDGE</code> texture wrapping mode were applied.
  