[cairo-bugs] [Bug 48260] PDF print output of Cairo has unneeded transparency with badly defined bounding boxes

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Mar 7 02:10:06 PST 2013


https://bugs.freedesktop.org/show_bug.cgi?id=48260

--- Comment #4 from Till Kamppeter <till.kamppeter at gmail.com> ---
To make printing also working well on mobile and generally low-performance
devices it gets very important to completely do away with transparency in PDF
output, at least if the document does not actually contain any transparent
graphical elements.

We should perhaps even make one output mode optimized for printing with no
transparency at all. This would allow fast print rendering, especially also on
mobile. Ghostscript developers suggest PDF/X-1 output here.

Another mode could use transparency only where it is actually needed, for
getting small, efficient PDF files for archiving and web download.

We should raise priority for this as slow printing is a very common problem
under Linux (and mostly caused by the transparency abuse in Cairo output) and
Linux gets more and more used on mobile battery-driven devices.

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