<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - pdfseparate + pdfunite produce different pdftoppm renderings" href="https://bugs.freedesktop.org/show_bug.cgi?id=81724#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - pdfseparate + pdfunite produce different pdftoppm renderings" href="https://bugs.freedesktop.org/show_bug.cgi?id=81724">bug 81724</a> from <a class="email" href="mailto:Thomas.Freitag@alfa.de" title="Thomas Freitag <Thomas.Freitag@alfa.de>"> Thomas Freitag</a> <pre>I have a first quick look into it, and I think, that I know, why it happens: the original file has a DestOutputProfile, so an Output intent. Since committing the patch for <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - Poppler ignores rendering intents and always uses INTENT_RELATIVE_COLORIMETRIC" href="show_bug.cgi?id=34053">bug 34053</a> on 2th of october 2013 we respect that in pdftoppm during rendering. I would guess, that with a version before that commit the output would NOT be different. pdfseparate respects output intents, I remember I created a patch to do that. That is okay, because an output intent (defined in the catalog dict) is used for every page in a multi page pdf, so the pdftoppm output between hola and orig is NOT different. But what should pdfunite do if it merges pages with output intents? Examine if the output intents are always the same? Use the first or the last output intent for every page in the merged pdf? Okay, in your test You use pdfunite with a single page, so in this very special case we could insert in the output intent in the result pdf. But I would say this is not a bug but a feature of pdfunite. To clearify what I mean, this is the interisting part of the original pdf: 164 0 obj << /Type /Catalog /Pages 165 0 R/ViewerPreferences <</Direction /L2R >> /Metadata 162 0 R /AcroForm 132 0 R /OutputIntents [<</Info (ISO Coated) /S /GTS_PDFX /OutputConditionIdentifier (FOGRA27) /OutputCondition (Offsetdruck entsprechend ISO/DIS 12647-2:2003, OFCOM, Positivplatte, Papiertyp 1 oder 2 \(gestrichenes Kunstdruckpapier, 115 g/m2\), Rasterweite 60/cm.) /DestOutputProfile 161 0 R /Type /OutputIntent /RegistryName (<a href="http://www.color.org">http://www.color.org</a>) >> ] >> endobj</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>