[mkgmap-dev] Control of Anti-aliasing in Lines

If I create a line of example width 1px as a 'bitmap' it is not 'anti-aliased' when displayed on the Garmin (GPSMAP 62s). However, if the 1px line is created as 'line only' on the TYP editor, then the line is 'anti-aliased' and therefore appears thicker at lower zoom levels. This anti-aliasing can be seen if the screen is examined with a magnifying glass. My question is 'can this anti-aliasing be controlled?. For example, could one create a complex pattern line as a bitmap and have it 'anti-aliased' as presently I don't see a way to do this?. Bill.