draw_set_circle_precision(128); 

gpu_set_blendmode_ext(bm_inv_dest_color, bm_zero);

if r_out > 0
    draw_circle_color(x, y, r_out, c_white, c_white, false);

if r_in > 0
    draw_circle_color(x, y, r_in, c_black, c_black, false);
	
gpu_set_blendmode(bm_normal);