int gamma_lut_changed;

	struct wlr_output_state pending = {0};
	struct wlr_gamma_control_v1 *gamma_control;

	/*
	 * HACK: The "correct" way to set the gamma is to commit it together with
	 * the rest of the state in one go, but to do that we would need to rewrite
	 * wlr_scene_output_commit() in order to add the gamma to the pending
	 * state before committing, instead try to commit the gamma in one frame,
	 * and commit the rest of the state in the next one (or in the same frame if
	 * the gamma can not be committed).
	 */
	if (m->gamma_lut_changed) {
		gamma_control = wlr_gamma_control_manager_v1_get_control(gamma_control_mgr, m->wlr_output);
		m->gamma_lut_changed = 0;
		if (!wlr_gamma_control_v1_apply(gamma_control, &pending))
			goto commit;
		if (!wlr_output_test_state(m->wlr_output, &pending)) {
			wlr_gamma_control_v1_send_failed_and_destroy(gamma_control);
			goto commit;
		}
		wlr_output_commit_state(m->wlr_output, &pending);
		wlr_output_schedule_frame(m->wlr_output);
	} else {
commit:

	}

	wlr_output_state_finish(&pending);

	struct wlr_output_state state;
	wlr_output_state_init(&state);
	if (!wlr_gamma_control_v1_apply(event->control, &state)) {
		wlr_output_state_finish(&state);
		return;
	}
	if (!wlr_output_test_state(event->output, &state)) {
		wlr_gamma_control_v1_send_failed_and_destroy(event->control);
		wlr_output_state_finish(&state);
		return;
	}
	wlr_output_commit_state(event->output, &state);
	wlr_output_schedule_frame(event->output);

	Monitor *m = event->output->data;
	m->gamma_lut_changed = 1;
	wlr_output_schedule_frame(m->wlr_output);