     palette followed by multiple mip-levels of
        texture indices used for lookup into the palette.
        The palette format can be one of
        <code class="constant">R5_G6_B5</code>,
        <code class="constant">RGBA4</code>,
        <code class="constant">RGB5_A1</code>,
        <code class="constant">RGB8</code>, or
        <code class="constant">RGBA8</code>.
        The texture indices can have a resolution of 4 or 8 bits.
        As a result, the number of palette entries is either
      