This will be useful for portalized print support.
https://bugzilla.gnome.org/show_bug.cgi?id=768499
56ebfc6 print job: Add api to send data from an fd
gtk/gtkprintjob.c | 35 +++++++++++++++++++++++++++++++++++
gtk/gtkprintjob.h | 4 ++++
2 files changed, 39 insertions(+)
Upstream: git.gnome.org