All /usr/share/doc/pipewire/html/*incl.png files are garbage: each of them contain nice empty boxes instead of letters. doc/Doxyfile.in specifies DOT_FONTNAME = Helvetica but graphviz doesn't pull a font that provides Helvetica. graphviz might do better by pulling, e.g. fonts-type1-urw, but there are quite a few alternative providers of Helvetica so unwillingness to pull a particular provider is also understandable. Please use an appropriate font for generated png files and ensure that this font is installed. The package itself should be noarch if possible (but beware of https://bugzilla.altlinux.org/show_bug.cgi?id=34101).
(В ответ на комментарий №0) > graphviz might do better by pulling, e.g. fonts-type1-urw, but there are > quite a few alternative providers of Helvetica so unwillingness to pull > a particular provider is also understandable. Might be just a (separate) bug though, we should ask a maintainer.