Bugs item #741, was opened at 2007-03-01 16:50 You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=493&aid=741&group_id=106 Category: PDF inclusion Group: v1.30.0 Status: Closed Resolution: Fixed Priority: 5 Submitted By: Uwe Stöhr (stoehr) Assigned to: Martin Schröder (oneiros) Summary: wrong colors for included PDF-images (page groups) Initial Comment: Attached is a PDF 1.4 image. When you include this to a document the output generated by pdfetex 1.30.6 the images looks different: The colors are much darker, see attached PDF result. ---------------------------------------------------------------------- Comment By: Erich Hoover (compholio) Date: 2008-03-04 20:43 Message: Logged In: YES user_id=4885 If you are using a distribution that has not caught up with the new release then I have found a work-around that may help. You can "fix" a PDF you would like to embed by using the PDF Writer backend for cups to convert your PDF to CMYK. Simply open the PDF with acroread and then use the "PDF" printer, this will place the CMYK version of the file in the "~/PDF/" folder. In a somewhat related issue, I've found that embedding some PNG files causes the same conversion problem. However, I do not see why some PNG files would do this and others would not. If someone can point me in the right direction for solving this then I'd appreciate it. ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-11-29 07:49 Message: Logged In: YES user_id=421 A fix for this will be included in the next release (1.40.6/1.50.0). ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-10-03 12:51 Message: Logged In: YES user_id=421 Fix is in the works. ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-09-30 23:08 Message: Logged In: YES user_id=421 Adding /Group to the /Page is not an option for us (and probably wrong): What should we do when we have more than one included pdf on a page and they have different /CS entries? And why does transparency in an /XObject need an entry in the /Page? The entry in the /XObject should suffice. I wouldn't be surprised if AR is faulty here. ---------------------------------------------------------------------- Comment By: Adrian Johnson (ajohnson) Date: 2007-09-30 18:04 Message: Logged In: YES user_id=4699 After adding /Group << /CS /DeviceRGB /Type /Group /S /Transparency

...

to the /Page object in newfile2-1.pdf it displays correctly in Acrobat. ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-09-30 17:04 Message: Logged In: YES user_id=421 The attached file newfile2-1.pdf has a copied page group, which as I now know, should be correct. Still, AR8@Linux shows different colours for it and TestSkizze.pdf . ---------------------------------------------------------------------- Comment By: Uwe Stöhr (stoehr) Date: 2007-09-30 16:51 Message: Logged In: YES user_id=3168

Why is this WONTFIX?

Sorry, this bug was once closed when this additional info was not available. -> I reopened this bug. ---------------------------------------------------------------------- Comment By: Uwe Stöhr (stoehr) Date: 2007-09-30 16:46 Message: Logged In: YES user_id=3168 Why is this WONTFIX? I mean:

The file TestSkizze.pdf specifies the color blending space with "/CS /DeviceRGB" in the transparency group. In the PDF produced by pdftex this has been stripped out.

So the bug is that pdftex strips out the color space. If you really think it's WONTFIX, then tell me what is the correct way of specifying the color space so that I can forward this to the Inkscape developers. ---------------------------------------------------------------------- Comment By: Adrian Johnson (ajohnson) Date: 2007-09-30 07:34 Message: Logged In: YES user_id=4699 The file TestSkizze.pdf specifies the color blending space with "/CS /DeviceRGB" in the transparency group. In the PDF produced by pdftex this has been stripped out. When the color space is not specified Acrobat defaults to CMYK. This results in RGB colors being converted to CMYK, blended in CMYK color space, then converted back to RGB. This will produce different results compared to blending the colors in RGB space. This problem was also reported to the cairo list: http://lists.cairographics.org/archives/cairo/2007-September/011471.html ---------------------------------------------------------------------- Comment By: Uwe Stöhr (stoehr) Date: 2007-03-03 11:41 Message: Logged In: YES user_id=3168

To my eye the Harlequin results are the same for both file,

Yes and the result is correct.

while Jaws has to different results.

In my eyes the Jaws results are identical but wrong. So it seems that pdftex is not the problem here, but it would be nice if pdftex could handle page groups in one of the next releases:

"PDF inclusion: Page Group detected which pdfTeX can't handle. Ignoring it." So I'm not sure to close this bug or mark it as enhancement. Thanks for your help.

---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-03-03 07:48 Message: Logged In: YES user_id=421 I've attached the results of two professional RIPs: Global Graphics Jaws & Harlequin. To my eye the Harlequin results are the same for both file, while Jaws has to different results. :-{ ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-03-02 05:16 Message: Logged In: YES user_id=421 Your document is using Page Groups (see PDF Reference 7.3.6). Including pdfs that use this is a grey area; see the notes in NEWS and pdftoepdf.cc. It works most of the times and with most RIPs. I'll look into it again, but I don't have much hope. Btw: pdftex warns you: "PDF inclusion: Page Group detected which pdfTeX can't handle. Ignoring it." ---------------------------------------------------------------------- Comment By: Uwe Stöhr (stoehr) Date: 2007-03-02 05:05 Message: Logged In: YES user_id=3168

problem in AR7 - but only there.

But how could this be a bug in Acrobat when Adobe set the standards? Why is this correctly shown before the pdftex-run. The display is the same here in Acrobat 5 - 8 so I think they would have fixed it when it's a bug since Acrobat 5. Hmm but OK, when I open the result with GSview besides the GS bug, the color tones are correctly be displayed. So close this bug report again, when you are sure that pdftex follows here exactly the PDF-specification. ---------------------------------------------------------------------- Comment By: Uwe Stöhr (stoehr) Date: 2007-03-02 04:57 Message: Logged In: YES user_id=3168

It's a bug in AR;

No! Acrobat is correct: I created this image with Inkscape 0.45 and exported it the as PDF. I designed e.g. the green as light green. And Acrobat 7 and 8 shows this exactly as designed while the pdftex result has wrong color tones, see the attached screenshots. (Ghostscript is btw. not able to render the PDF-image correctly - I reported this to the GS people who confirmed it.) ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-03-01 17:05 Message: Logged In: YES user_id=421 You don't say it, but I see the same problem in AR7 - but only there. It's a bug in AR; try kpdf or ghostscript instead. ---------------------------------------------------------------------- You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=493&aid=741&group_id=106