__plumvideo_clut_access
void __plumvideo_clut_access(struct plumvideo_softc *, u_int32_t *, int, int,
__plumvideo_clut_access(sc, rgb, beg, cnt, __plumvideo_clut_get);
__plumvideo_clut_access(sc, rgb, beg, cnt, __plumvideo_clut_set);
__plumvideo_clut_access(sc, NULL, 0, 256, __plumvideo_clut_default);