void (*size)(game_params *params, int *x, int *y);
float *(*colours)(frontend *fe, game_state *state, int *ncolours);
game_drawstate *(*new_drawstate)(game_state *state);
void (*size)(game_params *params, int *x, int *y);
float *(*colours)(frontend *fe, game_state *state, int *ncolours);
game_drawstate *(*new_drawstate)(game_state *state);