I am porting an old app over from Windows, and during one part it is supposed to draw a line and then erase it by drawing over it in the background color. This doesn't work under Haiku because non-straight calls to StrokeLine are antialiased, so the line is not completely erased. There is really no other good way to handle this, so I need to disable the antialiasing feature of StrokeLine. I can do it by using my own line drawing routine and pushing pixels manually, but that is horribly slow. I know how to disable _font_ antialiasing, but how to disable it for other sorts of drawing?