[pdftex] Utopia font is missing some font parameters

[Ross Moore]

Hi all,

I’ve encountered an issue with the Utopia font, as loaded with the Fourier package.
It affects the PDF content stream when  \pdfinterwordspaceon  is in effect.
A minimal example is attached, with the PDF content stream shown
afterwards, both with and w/out the Fourier package loaded.

e.g.
  /F18 10.0364 Tf 17.945 0 Td [(Th)1(i)]TJ/F20 1 Tf( )Tj/F18 10.0364 Tf 15.24 0 Td [(s)]TJ
instead of
  /F15 10.9091 Tf 34.272 0 Td [(This)]TJ

The effect is so subtle that it wouldn’t normally be noticed.
For me, it affects the Tags display in Acrobat Pro. when generating fully
Tagged PDF documents; as seen in the attached images (if they come through).

non-Fourier:
[cid:F98D9BAD-CBB4-4C96-92CA-4F4620267E99 at telstra.com.au]

with Fourier
[cid:3C1B7E0C-FB02-42C4-BED5-1B3550147577 at telstra.com.au]

Interword fake-spaces are being (incorrectly) inserted in the middle of some words,
as well as (correctly) between words.

Examining the application source:  pdftex.web
the code affected must be this:


    if gen_faked_interword_space and
        ((abs(v_out) > 2*x_height(f)) or
         (s_out > space(f) - space_shrink(f)) or
         ((f <> pdf_f) and (v = 0))) then
    begin
        must_insert_space := true;
    end;


which would allow such extra spaces if  space(f)  were to be zero, or otherwise too small.
The font here is (I think):   futs8r
Is there any way to check the values of the font parameters directly, in a running job?
Better still, can they be altered by  pdftex within the document preamble, say?

Or can the coding above be modified to first check that  space(f)  has a reasonable value?
If  0  or otherwise too small, replace it with a more realistic value when doing the
kind of testing done here.


Hope someone can help get this fixed.


Cheers

Ross


Dr Ross Moore

Mathematics Dept | 12 Wally’s Walk, 734
Macquarie University, NSW 2109, Australia

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M:+61 407 288 255<tel:%2B61%20409%20125%20670>  |  E: ross.moore at mq.edu.au<mailto:rick.minter at mq.edu.au>

http://www.maths.mq.edu.au<http://mq.edu.au/>


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