he name zero is reserved by the GL and is silently ignored, should it
            occur in <em class="parameter"><code>framebuffers</code></em>, as are other unused names. Once a framebuffer object is deleted, its name is again
            unused and it has no attachments. If a framebuffer that is currently bound to one or more of the targets <code class="constant">GL_DRAW_FRAMEBUFFER</code>
            or <code class="constant">GL_READ_FRAMEBUFFER</code> is deleted, it is as though <a class="citerefentry" 