Begin forwarded message:
From: Miklos Somogyi <[EMAIL PROTECTED]>
Date: 10 March 2006 9:56:05 PM
To: Werner LEMBERG <[EMAIL PROTECTED]>
Subject: Re: [Groff] How to pass parameters to included ps
On 24/02/2006, at 5:53 PM, Werner LEMBERG wrote:
How would I pass arbitrary ps parameters to an included ps routine?
E.g.
.something 50 (hello) 100
You probably want something like this:
.de END
..
.
.de something
. de something-aux END
ps: exec \\$*
. END
\Y[something-aux]
..
.
.something 50 (hello) 100
Thank you, thank you. I never used macros with endings other than
`..', so I would have never guessed
this solution.
And yeah, you can use $1, $2, ... if you are in a macro. Fabulous.
It seems that not even man grops' example is working
.nr x 5i
,de y
ps: exec
\nx u 0 rlineto stroke
..
It does -- in the example above you use `,' instead of `.' ...
Sorry about the `,'
Since this is the one and only example in `man grops' regarding
PostScript, I can still see
some problems:
1) To the uninitiated groffer, like me, it suggests that the way to
pass argument to PS is via
number registers, which is clearly not the case (put `.nr x 1i'
between the `y' macro and `\Yy').
2) `man' says that `u' will convert from groff units to the current
system.
Not so. It is defined as `/u {.001 mul} bind def' which is only ok
if the PS insert does not change
the scale. Mostly it does.
3) For the uninitiated groffer `man' perhaps should say that though PS
has nothing to do with
spaces in text, /Yy will generate one, so please take evasive
action.
4) Grops wraps included PS in a dictionary, that's all. So, dear user,
if you are doing more
PostScripty things, supply your own save-restore, please.
Miklos
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