GAMMA_RGB_256
gamma->type = GAMMA_RGB_256;
if (map_user_ramp && ramp && ramp->type == GAMMA_RGB_256) {
map_user_ramp && ramp && ramp->type == GAMMA_RGB_256,
(!map_user_ramp && ramp->type == GAMMA_RGB_256))
(map_user_ramp || ramp->type != GAMMA_RGB_256)) {
if (ramp->type == GAMMA_RGB_256 && map_user_ramp)
(map_user_ramp || (ramp && ramp->type != GAMMA_RGB_256)) &&