+++ This bug was initially created as a clone of Bug #39355 +++ On Linux Mint 13 KDE 64 bit and LibreOffice from PPA, version 3.6.0.2 (test by albertozugno@gmail.com), official 3.6.1.1 amd64 .deb binaries, libreoffice-3-6 dev tree (tests by lionel@mamane.lu) Broken PDF A/1 To reproduce: * Create a document in Writer * Click "File" > "Export as PDF..." * Check "PDF A/1-a" on the first tab * Click "Export" * Check conformance with a validator: http://www.validatepdfa.com/en/online.htm (email) http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx (web form) E.g. the pdf-tools.com validator says: The embedded ICC profile's version is not supported. The document does not conform to the requested standard. Probably with the switch from icc module to liblcms2, we also changed the ICC profile version that is embedded in the PDF. I haven't found an easy / FLOSS way to extract the ICC profile from the PDF, so don't know what version exactly is required. I checked that PDFs exported in PDF/1-a mode by LibreOffice 3.5 do pass the pdf-tools.com validation.
Yes, we changed the sRGB profile version. Before it was 2.1, with liblcms2, it is 4.0. Would be nice to know what the standard says and eventually check whether one can generate sRGB 2.1 using liblcms2. Any chance someone can help me to investigate the PDF standard.
I committed to master http://cgit.freedesktop.org/libreoffice/core/commit/?id=24f691867d02e853153a53e49276c2a8c30ea1fe that forces version 2.1 of the profile, the same we had in documents generated by LibreOffice 3.5. I tried to validate the document and yes, it was validating. @Lionel: could you verify and eventually cherry-pick to 3-6 branch if you are happy with the fix?
http://www.pdfa.org/publication/technical-note-tn0002-color-in-pdfa-1/ says: ICC profiles include major and minor version numbers which reflect the version of the ICC specification to which the profile conforms. According to the PDF ref- erence for PDF 1.3 and later versions, only specific major/minor ICC profile ver- sions are supported by a particular PDF version. For example, according to the PDF 1.4 reference only profiles based on ICC specification ICC.1:1998-09 and its addendum ICC.1A:1999-04 (internal profile version 2.2) are supported. However, this caused problems for users as profiling software moved to newer ICC versions. Since the ICC specification mandates that changes in the minor version number must never introduce any incompatible changes, industry ex- perts from the PDF/A, PDF/X, and color communities agreed on the following re- laxed ICC versioning scheme for PDF: · PDF 1.4 and below accept ICC major version 2 (any minor version). · PDF 1.5 and above accept ICC major version 4 or below (any minor version). On this basis PDF/A-1 documents can use all version 2.x ICC profiles, regardless of the minor version. According to http://www.color.org/icc_specs2.xalter, Specification ICC.1:2001-04, the latest 2.x is 2.4. So my understanding is we are allowed to use up to 2.4.
I've relaxed to 2.4 in master and committed the change to 2.1 in libreoffice-3-6. Fix will be available in LibreOffice 3.6.2 and later.
(In reply to comment #4) > I've relaxed to 2.4 in master and committed the change to 2.1 in > libreoffice-3-6. I reverted that commit for two reasons: 1) we advertise the 2.1 in the name of the profile and that is the version we have in the previous releases; 2) the liblcms2 author recommends to use 2.1 version if we want liblcms2 generate 2.x profiles. So I somehow prefer to play it safe, especially that this is sRGB profile and having a version 2.1 or 2.4 embedded will not change anything in its capacity.
(In reply to comment #4) > Fix will be available in LibreOffice 3.6.2 and later. I don't see it in libreoffice-3-6 branch. Did you push?
(In reply to comment #5) > (In reply to comment #4) >> I've relaxed to 2.4 in master and committed the change to 2.1 in >> libreoffice-3-6. > I reverted that commit for two reasons: 1) we advertise the 2.1 in the name of > the profile; 2) the liblcms2 author recommends to use 2.1 version if we want > liblcms2 generate 2.x profiles. OK.
(In reply to comment #6) > (In reply to comment #4) >> Fix will be available in LibreOffice 3.6.2 and later. > I don't see it in libreoffice-3-6 branch. Did you push? Yes: http://cgit.freedesktop.org/libreoffice/core/commit/?h=libreoffice-3-6&id=5a36a0cab0d4d32968404c0d88772e1a6303af00 And I cannot see your revert. Did *you* push?