     Logic operations have no effect on floating point draw buffers. However, if
            <code class="constant">GL_COLOR_LOGIC_OP</code> is enabled, blending is still disabled
            in this case.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>opcode</code></em> is not an accepted value.
        </p>
      </div>
      <div class="refsect1" id