Hi all,
this might be a quite strange question, but it bothers me for some time
now: What happens when I input a character that is not available in the
current font?
Consider the following minimal example:
\pdfcompresslevel0
aßa
\bye
In the pdf, I only get the “aa” as expected. However, for a long time
now I thought, the “ß” would still make its way into the pdf but would
just not be shown by the viewer. Loading a font, e.g. by using fontspec,
the ß of course is there. So I inspected the pdf (hence
\pdfcompresslevel0) and indee I see:
/F15 9.96264 Tf 1 0 0 1 91.925 759.927 Tm [(aa)]TJ
But when I look into some callbacks, I see that still in the
pre_output_filter the ß node is present, with the width 0 which makes
sense to me.
So, at what point is the information lost that there is an additional
glyph node?
cheers
Arno
