/** BTF command type byte values — paired with the packer in `@suaveplan/font-compress`. */
export const CMD_M = 0;
export const CMD_L = 1;
export const CMD_B = 2;
export const CMD_Q = 3;
export const CMD_Z = 4;

/** Reverse lookup from command byte to its single-character letter form. */
export const BYTE_TO_CMD: readonly string[] = ["m", "l", "b", "q", "z"];

/** Number of coordinate values per command letter. */
export const CMD_COORD_COUNTS: Readonly<Record<string, number>> = {
    m: 2,
    l: 2,
    b: 6,
    q: 4,
    z: 0,
};

/** Number of metric values encoded in the BTF header. */
export const METRICS_COUNT = 9;