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On 2012-04-03T17:00:25+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/cairo/+bug/968785/comments/6


** Changed in: cairo
       Status: Unknown => Confirmed

** Changed in: cairo
   Importance: Unknown => High

** Bug watch added: Ghostscript (AFPL) Bugzilla #692959
   http://bugs.ghostscript.com/show_bug.cgi?id=692959

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https://bugs.launchpad.net/bugs/968785

Title:
  ghostscript runs for indefinitely long period of time when called by
  foomatic-rip

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