try"><span class="refentrytitle">glMapBufferRange</span></span></a>).
            When a data store is unmapped, the mapped pointer becomes
            invalid.
        </p>
        <p>
            <code class="function">glUnmapBuffer</code> returns
            <code class="constant">GL_TRUE</code> unless the data store contents have
            become corrupt during the time the data store was mapped. This
            can occur for system-specific reasons that affect the
            availability of graphic