[Printing-architecture] Fixes and changes on the "cups" output device of Ghostscript -Please Test!
till.kamppeter at gmail.com
Mon May 4 04:17:32 PDT 2009
I did a little correction on my changes, both in the Ghostscript SVN
repositories and in the patch for Ghostscript 8.64 which I have uploaded:
The "*cupsEvenDuplex:" PPD keyword is already treated by the pstops and
the pdftopdf CUPS filters, so it should not get treated again by
Ghostscript's CUPS Raster device. So I have removed the appropriate changes.
Olease re-download the patch
or the modified source file
for Ghostscript 8.64 or update your Ghostscript 8.65 snapshot from the
Till Kamppeter wrote:
> Here is the second part of my fixes and changes.
> This time I have added support for the "APDuplexRequiresFlippedMargin"
> PPD keyword as described on in the "Mac OS X Attributes" section of
> I have also fixed the margin handling. By testing with a document with
> gray background, a PPD with 4 different unprintable borders for the 4
> edges of the paper, and rasterview I have seen that the printout did not
> always get gray up to the unprintable borders. There were often wider
> white borders than necessary. Now I have checked with all
> duplex/portrait/landscape settings that the background will really fill
> up the page as much as the printer allows. This is naturally also valid
> for any graphical element in the document to be printed. Now we get
> always the best possible results for objects near the borders. In
> addition, the content should be accurately positioned on the page (not
> slightly shifted).
> I have committed the changes again to the SVN repository of Ghostscript,
> so that they will make it into GPL Ghostscript 8.65.
> Here is a patch containing ALL my changes (also of the first part) on
> Please apply this patch to an unpatched Ghostscript 8.64. Or take the
> complete file"and replace cups/gdevcups.c in the Ghostscript source with
> Please test it. Now all duplex issues when developing CUPS Raster
> drivers should get solved.
> Till Kamppeter wrote:
>> I have done several fixes and enhancements on the CUPS Raster output
>> device of Ghostscript, to support the Duplex-related keywords in the
>> CUPS PPD extensions (all tests done with Mike Sweet's "rasterview"):
>> Did not work for landscape documents. In general, the XY and YX
>> components of the matrix were swapped. This broke the output with
>> asymmetric resolutions (like 300x600 dpi) and back sides which are
>> supposed to be rotated or Y-flipped came out blank.
>> Introduced support for this keyword which is the replacement for
>> *cupsFlipDuplex:. Therefore *cupsFlipDuplex: gets generally ignored if
>> *cupsBackSide: is supplied. All modes described in the PPD extensions
>> are supported.
>> Introduced support for this keyword. Now "*cupsEvenDuplex: True"
>> causes a blank page to be appended to documents with odd numbers of
>> All these changes I have committed to the SVN repository of
>> Ghostscript and so they get part of GPL Ghostscript 8.65.
>> I have also created patches for Ghostscript 8.64 and uploaded them to
>> The patches are
>> The first patch also contains the fixes for the *cupsFlipDuplex: keyword.
>> In addition, I have added support for having page size entries in the
>> PPD which have the same width and height but differ only by the
>> margins, like "A4" with normal margins and "A4.fullbleed" with zero
>> margins. The fix is also uploaded to the SVN repository for
>> Ghostscript 8.65 and the patch for 8.64 is this one:
>> at the same place as the other two patches.
>> I will look into the "*APDuplexRequiresFlippedMargin:" keyword soon.
>> Please have a look into the patches and try them out. Tell me whether
>> they are OK and if something does not work, please supply fixes orhelp
>> me to fix it.
>> Thanks in advance.
More information about the Printing-architecture