GLUTcolormap
GLUTcolormap *next; /* next colormap in list */
GLUTcolormap *colormap; /* colormap; NULL if RGBA */
GLUTcolormap *colormap; /* colormap; NULL if RGBA */
extern GLUTcolormap * __glutAssociateNewColormap(XVisualInfo * vis);
extern void __glutFreeColormap(GLUTcolormap *);
GLUTcolormap ** colormap,