This function can be used to set the anti-aliasing (AA) level for SWF format vector sprites. This can be a real value from 0 to 1 and will "smooth" the edges of these sprites. Note that to see this effect, you must first have enabled AA using the function draw_enable_swf_aa().
|AA||The anti-aliasing value to use from 0 to 1.|
if draw_get_swf_aa_level() == 0
The above code will check the AA value for SWF format sprites, and if it is 0 it enables AA and sets the value to 0.5.