gamma_r
double gamma_r(double, int *);
PROTO_DEPRECATED(gamma_r);
u_int16_t gamma_r[IBM561_NGAMMA_ENTRIES];
data->gamma_r[0] = data->gamma_g[0] = data->gamma_b[0] = 0x00;
data->gamma_r[i] = data->gamma_g[i] = data->gamma_b[i] = 0xff;
ibm561_regcont10bit(data, IBM561_CMD_GAMMA, data->gamma_r[i]);