Re: Setup linewidth for Laserwriter

["Mark A. Tapia" <markt@dgp.toronto.edu>]

On Sat Jan 30 07:09:30 1993 Martin Emele writes:
    Does anyone know how to change the default linewidth setup for
    printing on a laserwriter. I'm using Mark A. Tapia's print-u.lisp
    utility for printing a PICT graphic on a Laserwriter IIg. I set the
    Quickdraw pensize to #@(1 1) and it looks fine on the screen even
    after scaling but if I print it on the Laserwriter the lines show up
    as thick lines (probably 1 point lines).
Martin describes a typical problem with "displaying" graphics on 
devices with different resolutions. When using Quckdraw, there appears
to be no way to "draw" a line that is less than one pixel wide.
For a standard Mac screen this is 1/72".  This is a limitation of
Quickdraw which does not occur in PostScript.

One way to make the change is to specify that the picture is being drawn
at a scale of 4*75 pixels per linear inch. Another is to issue all the
drawing commands for lines as if the document were 4x its real size
and then forcing a print reduction of 25%. Lines drawn at 1 pixel in the
in the enlargement will be roughly 1/4 the size in the "printed" version.

mark