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Re: Support regarding input of unicode chars


From: Deri
Subject: Re: Support regarding input of unicode chars
Date: Wed, 08 Nov 2023 18:47:30 +0000

On Wednesday, 8 November 2023 07:29:49 GMT Gustavo Calvo wrote:
> Hi! Is there a way to use character U+2112 in my document? So far I have
> tried `\[u2112]`, which does seem to work for characters like `\[u0394]`
> that are listed in the groff_char manual.

Hi Gustavo,

If you are going for terminal output, Branden has dealt with that. If you want 
PDF or Postscript output, I'm afraid you will have to do a bit of work. The 
problem is that the "Laplace transform" (U+2112) character is not present in 
groff's symbol font, so you need to install a suitable font to supply the 
glyph.

On my system I found the glyph in a font:-

/usr/share/fonts/opensymbol/opens___.ttf

Since it is a truetype font I had to convert it to a type 1 font with 
fontforge and then run afmtodit to create a groff font file called OS. You may 
be able to use the install-font.sh script available at:-

http://www.schaffter.ca/mom/mom-06.html

Although the font should be installed as a symbol font rather than a text font 
and I'm not sure if the script handles that yet.

After installation this works:-

printf ".special OS\n\s'24'ℒ"|groff -k -ms -Tpdf > Laplace.pdf

The result is attached.

If you prefer I can send you the resulting fonts, plus instructions.

Cheers 

Deri

Attachment: Laplace.pdf
Description: Adobe PDF document


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