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partial font downloading
- To: firstname.lastname@example.org
- Subject: partial font downloading
- From: tech-help@YandY.com (Y&Y Inc)
- Date: Fri, 8 Sep 1995 21:13:49 -0400
> I have a vague recollection that there was some kind of utility out there
> ... that could strip out those characters from a downloaded font so it just
> included the glyphs actually used.
This `partial font downloading' capability has been in DVIPSONE from the
very beginning in 1990. On short jobs it can cut PS file size by a factor of
4 to 8, greatly speeding PS printing (making it fun instead of painful) and
greatly reducing change of running out of printer VM. Which a few years
ago was a big issue with output from TeX, since TeX loves to use lots of fonts.
Less of an issue today when printers tend to come with lots of memory...
It is a good idea to have a way of selectively suppressing it, since one can
come across nasty fonts that are not ATM compatible, yet are legal PostScript,
and without a full PS interpreter built in you can't be sure of handling them.
And then there are `synthetic', `hybrid', `compound' fonts, fonts with `font
wrappers', and now also Multiple Masters...
Note that Acrobat Distiller release 2.0 and later now also include this
(check `Make Font Subsets'). But this *only* works prorperly if you do an
undocumented thing: Add the line
<< /SubsetFonts true /MaxSubsetPct 99 >> setdistillerparams
to `example.ps' in the `startup' directory/folder. Without this line, it
`Font Subsets' only only some rare fonts from which you use less than
about 10% of the characters! Help pressure Adobe to make 99% the
efault, *not* 10%! Without this file size is bloated quite unneccessarily
and `font leakage' is unabatted.