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CUPS: Helped Sergio Cazzolato to find a fix for a CUPS bug when testing the cups interface of snapd on Debian unstable.Ghostscript: Reported crash when generating PCLm with SGray ICC profile and posted feature request for a grayscale PCLm mode.This was motivated by the discovery of a driverless printer which supports only PCLm, the HP LaserJet M15. cups-filters: On the way to cups-filters 2.x added monochrome PCLm output support to the ghostscript() filter function ( commit, commit), added PCLm output support to the gstoraster filter function wrapper ( commit), and added MiME rules for PCLm ( commit).Later on, will do the integration of the default-provider: cups in the cups interface, so that no extra content interface needs to be defined in the client application Snaps. With this done we will announce the interface for snappers to use.
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To make the new cups interface usable for application snappers we need first to add the /var/snap directories to the base Snaps ( in the next few days), release snapd 2.55.0 ( in 2-4 weeks), and add cups-socket-directory: $SNAP_COMMON/run and assumes: to snapcraft.yaml of the CUPS Snap (me, right after snapd 2.55.0 release).
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