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Bug#801339: fonts-texgyre: missing glyphs when viewing PDFs via poppler

Hilmar Preuße wrote:
> Am 08.10.2015 um 20:52 teilte Jim Paris mit:
> 
> Hi Jim,
> 
> > When viewing PDFs that do not embed Helvetica, the μ (U+03BC) 
> > character does not render correctly when fonts-texgyre is installed. 
> > For example, this PDF: http://jim.sh/~jim/tmp/bugs/tps62120.pdf
> > 
> > With fonts-texgyre (20150923-1) installed, glyphs are missing:
> > 
> For any reason that bug was invisible to us, sorry late response.
> 
> Your example URL is invalid meanwhile: are you able to reproduce the
> issue w/ latest fonts-texgyre installed? If yes, could you provide a new
> example or a TeX source code?

I've restored the link.

I just reinstalled fonts-texgyre and I do not currently see this
problem (xpdf 3.04-13, fonts-texgyre 20180621-3).  However, I think
this may be because some other system configuration has changed,
because "TeXGyreHeros" is no longer the substitute font that poppler
chooses:

  $ pdffonts -subst tps62120.pdf
  name                                 object ID substitute font                      substitute font file
  ------------------------------------ --------- ------------------------------------ ------------------------------------
  Arial-BoldMT                             81  0 Arial Negreta                        /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf
  ArialMT                                  83  0 DejaVu Sans                          /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
  Arial-ItalicMT                          101  0 Arial Cursiva                        /usr/share/fonts/truetype/msttcorefonts/Arial_Italic.ttf
  Arial-BoldItalicMT                      401  0 Arial Negreta cursiva                /usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf
  Helvetica                               889  0 NimbusSans-Regular                   /usr/share/fonts/opentype/urw-base35/NimbusSans-Regular.otf
  Helvetica-Bold                          890  0 NimbusSans-Bold                      /usr/share/fonts/opentype/urw-base35/NimbusSans-Bold.otf
  Helvetica                               905  0 NimbusSans-Regular                   /usr/share/fonts/opentype/urw-base35/NimbusSans-Regular.otf
  Helvetica-Bold                          906  0 NimbusSans-Bold                      /usr/share/fonts/opentype/urw-base35/NimbusSans-Bold.otf
  Arial-BoldItalicMT                      973  0 Arial Negreta cursiva                /usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf
  ArialMT                                 975  0 DejaVu Sans                          /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
  Arial-BoldMT                            977  0 Arial Negreta                        /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf

Let's see...
If I check "fc-match", it seems "TeX Gyre Heros" is still high up on
the list, but "Nimbus Sans" beat it:

  $ fc-match -s Helvetica | head -8
  NimbusSans-Regular.otf: "Nimbus Sans" "Regular"
  n019003l.pfb: "Nimbus Sans L" "Regular"
  texgyreheros-regular.otf: "TeX Gyre Heros" "Regular"
  Arial.ttf: "Arial" "Regular"
  LiberationSans-Regular.ttf: "Liberation Sans" "Regular"
  DejaVuSans.ttf: "DejaVu Sans" "Book"
  DejaVuSans-Bold.ttf: "DejaVu Sans" "Bold"
  DejaVuSans-Oblique.ttf: "DejaVu Sans" "Oblique"

Those Nimbus fonts are coming from package fonts-urw-base35.  If I
remove that package[*], then "TeX Gyre Heros" is back as the PDF font
substitution:

  $ pdffonts -subst tps62120.pdf
  name                                 object ID substitute font                      substitute font file
  ------------------------------------ --------- ------------------------------------ ------------------------------------
  Arial-BoldMT                             81  0 Arial Negreta                        /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf
  ArialMT                                  83  0 DejaVu Sans                          /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
  Arial-ItalicMT                          101  0 Arial Cursiva                        /usr/share/fonts/truetype/msttcorefonts/Arial_Italic.ttf
  Arial-BoldItalicMT                      401  0 Arial Negreta cursiva                /usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf
  Helvetica                               889  0 TeXGyreHeros-Regular                 /usr/share/texmf/fonts/opentype/public/tex-gyre/texgyreheros-regular.otf
  Helvetica-Bold                          890  0 TeXGyreHeros-Bold                    /usr/share/texmf/fonts/opentype/public/tex-gyre/texgyreheros-bold.otf
  Helvetica                               905  0 TeXGyreHeros-Regular                 /usr/share/texmf/fonts/opentype/public/tex-gyre/texgyreheros-regular.otf
  Helvetica-Bold                          906  0 TeXGyreHeros-Bold                    /usr/share/texmf/fonts/opentype/public/tex-gyre/texgyreheros-bold.otf
  Arial-BoldItalicMT                      973  0 Arial Negreta cursiva                /usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf
  ArialMT                                 975  0 DejaVu Sans                          /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
  Arial-BoldMT                            977  0 Arial Negreta                        /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf

And the μ glyph is once again missing from my PDF.

So I do still believe the fonts-texgyre package does have some
encoding or other issue.

Jim


[*] I used "dpkg --force-depends -r fonts-urw-base35" to remove it,
because I have other packages that depend on it that I didn't want to
mess with.  But poppler and xpdf were not among the packages that
depended on fonts-urw-base35.
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