[OS X TeX] Line thickness in TeXShop preview (and Preview.app) on Tiger

[Piet van Oostrum]

>>>>> Bruno Voisin <bvoisin at mac.com> (BV) wrote:

>BV> It seems that in TeXShop's preview window on Tiger (hence with  version
>BV> 2.02) the thickness of lines, as produced by underlining or  in tables,
>BV> varies: some lines have (what looks like) one pixel  thickness, while
>BV> others have two pixels thickness.

>BV> This appears to be connected with the magnification: at 100% or 200%  all
>BV> lines have the same thickness, but when the PDF document isn't  displayed
>BV> at an integer multiple of its original resolution, for  example with 150%
>BV> magnification, the thickness starts to vary. Local  rounding artifacts when
>BV> mapping from the document resolution to the  screen resolution, when the
>BV> two are no integer multiples of each other?

I think so. It is quite probable that the top and bottom coordinates, or
the left and right coordinates are rounded to pixels independently. It is
hard to get all lines to display with the same width without some kind of
`hinting'. 
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: piet at vanoostrum.org
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