[cairo] generation of inefficient postscript?
adam at spicenitz.org
Sat Feb 9 19:47:06 PST 2008
Adrian Johnson wrote:
> Adam Goode wrote:
>> I'm observing a bad behavior when printing from a newer Evince.
>> Specifically, PDF files with images usually crash the printer. This does
>> not happen with xpdf, acroread, etc. The printer is a midrange HP
>> LaserJet 1320. I am using the native PostScript mode of the printer.
>> It looks like xpdf and acroread are pretty straightforward about how
>> they convert images from PDF to PS. Often the image data is passed
>> through basically unchanged, and the PS image operator is used. This is
>> good, since my printer seems to efficiently implement the image operator.
>> cairo (as used by Evince for printing) seems to take a more generic
>> route, converting images (and other things) into patterns. This makes
>> sense, as cairo is somewhat removed from the PDF reading. Unfortunately,
>> my HP printer chokes on large patterns. (Small patterns will work, but
>> extremely slowly.) I have to powercycle to recover.
> I have been aware that the use of patterns for non repeating images is
> not ideal and started work on a patch to fix this. However this had been
> a low priority as I had not previously seen any problems reported.
> This is obviously something that needs to be fixed before 1.6.
Any status on this? I would be interested to see your patch to see if
there is anything I could do.
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