From: "Russ Cox" <rsc@swtch.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
Subject: Re: [9fans] troff to postscript with New Century Schoolbook: discrepancies?
Date: Sun, 7 Dec 2008 10:45:59 -0800 [thread overview]
Message-ID: <dd6fe68a0812071045x75d4a558t6310693d27a31229@mail.gmail.com> (raw)
In-Reply-To: <825F3EB5-8C63-4678-B993-21A3D1531DF5@mac.com>
> New Century Schoolbook is a font included in Plan 9.
Included in Plan 9, no. Known to troff, yes.
When you view a file with this font using page,
what displays on the screen is the Ghostscript
pseudo-equivalent (URW)++ Century Schoolbook L.
> [Why does \f(NR― work while
> .fp 1 NR
> ―
> does not?]
In both cases, the NR font does not have an em dash.
Lucky for you, troff assumes that characters it doesn't
know about have width 1em and passes them through.
\f(NR temporarily mounts NR as font 0 and uses font 0,
while .fp 1 NR mounts NR as font 1. In the former case,
font 1 is still R; in the latter, it is not. If tr2post cannot
find a character in the current font, it tries font 1, so that
for example if there isn't an italic dash in font 2, it will
fall back to the roman dash in font 1. The difference is
that in the first case, font 1 is still a font with a dash.
Russ
prev parent reply other threads:[~2008-12-07 18:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-07 18:04 Pietro Gagliardi
2008-12-07 18:45 ` Russ Cox [this message]
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