ams</code></em>.  For variables in the <code class="constant">GL_UNIFORM</code> and
            <code class="constant">GL_BUFFER_VARIABLE</code> interfaces that are backed by a buffer object, the value
            written is the offset of that variable relative to the base of the buffer
            range holding its value.  For variables in the <code class="constant">GL_TRANSFORM_FEEDBACK_VARYING</code>
            interface, the value written is the offset in the transform feedback
            buffer stora