Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!nntp.club.cc.cmu.edu!micro-heart-of-gold.mit.edu!bloom-beacon.mit.edu!bloom-beacon.mit.edu!panix!not-for-mail From: rodd@panix.com (Rod Dorman) Newsgroups: comp.lang.postscript Subject: Re: An empty correspondence with the CEO of Adobe Systems Date: Mon, 16 Mar 2015 19:05:59 +0000 (UTC) Organization: Public Access Networks Corp. Lines: 32 Message-ID: References: <15318244-a1c5-42c8-8f76-18279a120b03@googlegroups.com> NNTP-Posting-Host: panix2.panix.com X-Trace: reader1.panix.com 1426532759 23727 166.84.1.2 (16 Mar 2015 19:05:59 GMT) X-Complaints-To: abuse@panix.com NNTP-Posting-Date: Mon, 16 Mar 2015 19:05:59 +0000 (UTC) X-Newsreader: trn 4.0-test76 (Apr 2, 2001) Xref: csiph.com comp.lang.postscript:2202 In article , ken wrote: >In article , ken@spamcop.net >says... >> >> In article <15318244-a1c5-42c8-8f76-18279a120b03@googlegroups.com>, >> jdawiseman@gmail.com says... >> >> > > If the settransfer is ignored by Mac Preview, even though its valid, >> surely this is a problem with Mac Preview, not pdfwrite ? >> > >> > But Preview heeds the Distiller implementation. See: >> > https://groups.google.com/forum/#!topic/comp.lang.postscript/NJLAfvN_jwU >> >> Still, if the transfer function is legal (which I assume it is, since it >> works in Reader), the fault is in Mac Preview. Without knowing what >> exactly Mac Preview is doign its kind of hard to 'fix' the bug by >> altering what pdfwrite produces. > >FWIW, you are correct that Distiller is pickling the transfer funtion >into the colours in the PDF file, while Ghostscript is preserving the >transfer funtion. > >Its surprising how many PDF Readers are unable to handle transfer >functions, I'm disappointed to see that Mac Preview is among them. It also had a problem with the Separation colorspace where it would just ignore it. -- -- Rod -- rodd(at)polylogics(dot)com