Launchpad has imported 6 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=48260.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2012-04-03T10:00:25+00:00 Till Kamppeter wrote: For printing on Dabian and Ubuntu GTK/GNOME-based applications (like evince) generate PDF with Cairo and send it to CUPS. CUPS calls Ghostscript to convert this PDF into the printer's native data format. Problem is that the PDF generated by Cairo renders very slowly with Ghostscript in the printing-typical resolutions of 600dpi and more. This is caused by pointless use of transparency also if only opaque objects are drawn and in addition, the bounding boxes of the transparency groups are always the entire page. Since Ghostscript has to allocate memory to hold the raster data for each transparency the overall memory consumption can get multiples of the memory needed for th final page's raster data, making the machine swapping to the death. Can this be improved? PDF-based printing got standard now. Sample bug reports: https://bugs.launchpad.net/ubuntu/+source/ghostscript/+bug/968785 https://bugs.launchpad.net/ubuntu/+source/ghostscript/+bug/668800 (comment #36) http://bugs.ghostscript.com/show_bug.cgi?id=692959 Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/0 ------------------------------------------------------------------------ On 2012-04-03T15:57:45+00:00 Adrian Johnson wrote: The page sized bounding boxes problem has been fixed in 1.12.0. The use of transparency groups for opaque objects is something that can be improved. Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/1 ------------------------------------------------------------------------ On 2012-04-03T16:15:21+00:00 Till Kamppeter wrote: Can you give me a patch for 1.10.2 which I could apply to the Ubuntu Precise (12.04) package? Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/2 ------------------------------------------------------------------------ On 2012-04-03T16:30:50+00:00 Adrian Johnson wrote: There are too many changes. Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/3 ------------------------------------------------------------------------ On 2013-03-07T10:10:06+00:00 Till Kamppeter wrote: 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. Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/4 ------------------------------------------------------------------------ On 2013-03-25T10:48:17+00:00 Till Kamppeter wrote: More Ubuntu bug reports showing this problem: https://bugs.launchpad.net/bugs/980616 https://bugs.launchpad.net/bugs/1159452 Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1159452/comments/9 ** Changed in: libcairo Status: Unknown => Confirmed ** Changed in: libcairo Importance: Unknown => High ** Bug watch added: Ghostscript (AFPL) Bugzilla #692959 http://bugs.ghostscript.com/show_bug.cgi?id=692959 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1159452 Title: unable to print entire pdf for some files in evince To manage notifications about this bug go to: https://bugs.launchpad.net/libcairo/+bug/1159452/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
