[Scribus] [announce] CMYK Patch gets image support

[Craig Bradney]

On Saturday 12 February 2005 21:57, Martin Costabel wrote:
> David Purton wrote:
> > Hi folks,
> >
> > I finally uploaded a first up attempt at getting CMYK images working.
> >
> > http://marshwiggle.net/scribus/
> >
> > There is a tarball containing test files and what I say is the "correct"
> > output for comparison.
>
> Sorry for coming late into this discussion. I also apologize for not
> knowing anything about color management, profiles and such things.
>
> But I have the suspicion that the participants in this discussion are
> all using little-endian systems, so my experiences with the patch on the
> bigendian MacOSX/Fink version of scribus might be useful. In short: they
> are not pretty.
>
> I have looked at the files in cmyk-patch-test.tar.bz2 and I am seeing
> the following:
>
> A. On unpatched scribus-1.2.1 with standard rgb and cmyk profiles:
>
> 1. If I open a new document and either import cmyk.eps or create picture
> frames and load any one of cmyk.eps, cmyk.tif, or rgb.tif, I get 4
> absolutely identical results, except that the imported cmyk.eps shows
> white vertical separation lines in the middle of the squares. The
> printer preview looks also almost the same. The colors are not identical
> to any of the cases in the screen.pdf or printer.pdf files, they are
> somehow "brighter".
> 2. If I open the cmyk.sla file, the last 3 cases where files are said to
> be loaded into picture frames, look identical but very different from
> case 1, but the first series that is said to correspond to imported
> cmyk.eps looks completely wrong: For example the first square that
> should show two shades of cyan, has a cyan half and a red half and so
> on, all squares show two different colors in the two halves.
>
> B. On a patched scribus-1.2.1.cvs:
>
> 1. In a new document, the imported cmyk.eps, the picture frames with
> loaded cmyk.eps and with rgb.tif still look identical and almost
> identical to the unpatched case A. However, the picture frame with
> loaded cmyk.tif is completely wrong: Yellow becomes magenta, black
> becomes cyan, whereas cyan, magenta, red and green in the first row and
> blue in the second row all become white.
> 2. If I open the file cmyk.sla, the first series (imported cmyk.eps)
> looks for the first time similar to what it should, namely every square
> shows two shades of the same color. The other 3 series show different
> behaviors: The cmyk.eps and rgb.tif look almost like they did in A1, but
> the cmyk.tif has blue instead of light brown, red instead of black and
> black instead of red, and various shades of green instead of cyan,
> magenta and blue.
>
> In conclusion: I hope that this patch does not make it into the official
> scribus sources until it is fixed for bigendian systems.
>
> If I can make specific tests, please tell me, but I will not have the
> time to chase endian bugs in the sources myself this time.

Please make some screenshots at least so we can see these. We have the patches 
in 1.3 already and we can easily patch there.

Craig
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