Poppler::PSConverter mismanages certain OTF fonts embedded in the document?
Hi, I am encountering an issue with the Okular PDF viewer that might ultimately be caused by an incorrect behavior of PSConverter, so I am also posting here for feedback.
Some PDF documents using certain OTF fonts are visualized correctly by okular, but do not print well, because some characters get changed in to small squares. Looks like okular does not pass the PDF directly to the printer, but for historical reasons performs an intermediate conversion to postscript, using Poppler::PSConverter. Hence, I wonder if it might be this conversion to be troublesome and to break the fonts.
The issue is particularly frequent on documents prepared with Libreoffice, using the free Adobe fonts in the "Source" family (e.g. Source Sans 3, see https://github.com/adobe-fonts/source-sans).
Here is the link to the discussion on the okular tracker: https://bugs.kde.org/show_bug.cgi?id=467328
Here is a PDF document triggering the issue: test.pdf