uffer</code> transfers a rectangle of pixel values from one region of the read framebuffer to another region in
            the draw framebuffer. <em class="parameter"><code>mask</code></em> is the bitwise OR of a number of values indicating which buffers are
            to be copied. The values are <code class="constant">GL_COLOR_BUFFER_BIT</code>, <code class="constant">GL_DEPTH_BUFFER_BIT</code>, and
            <code class="constant">GL_STENCIL_BUFFER_BIT</code>. The pixels corresponding to these buffer