155         int i_before = selected;  in add_stop_data()  local
156         if ( i_before == -1 )  in add_stop_data()
157             i_before = stops.size() - 1;  in add_stop_data()
159         if ( i_before == stops.size() - 1 )  in add_stop_data()
161             if ( stops[i_before].first < 1 )  in add_stop_data()
163                 color = stops[i_before].second;  in add_stop_data()
164                 pos = (stops[i_before].first + 1) / 2;  in add_stop_data()
168             i_before--;  in add_stop_data()
171         index = i_before + 1;  in add_stop_data()
172         pos = (stops[i_before].first + stops[i_before+1].first) / 2;  in add_stop_data()
173         color = blendColors(stops[i_before].second, stops[i_before+1].second, 0.5);  in add_stop_data()