Article View: comp.os.linux.misc
Article #886Re: Anyone know the CUPS system well?
From: The Natural Philosopher
Date: Sat, 24 Jan 2009 09:50
Date: Sat, 24 Jan 2009 09:50
28 lines
2611 bytes
2611 bytes
Alan Braggins wrote: > In article <1232722601.22282.0@proxy00.news.clara.net>, The Natural Philosopher wrote: >>> Have you checked that the postscript code being fed into the front end >>> actually has the correct Postscript in it. More likely, the application >>> printing the pdf isn't creating the postscript properly. >> well yes, I have. In that every other PDF renderer actually sees the >> correct output, but cups cant print it. > > Do you mean PS renderer, or have you not actually checked the Postscript, > only the PDF? Ok, what I did yesterday was parse the PDF to a PS using pfdtops, which uses the same core as the CUPS system. The problem was in the PS file, so it happens in the conversion to postscript. From what I can glean reading through the debian bugs, this is a known problem, and there are various forks off GS, one of which solves this problem and may yet get into the main stream of CUPS. I think someone else pointed out that postcript does NOT contain the concept of transparency: therefore a PDF containing a transparent image has to be rendered to a bitmap and a mask applied to the background to enable the transparent part of the image to be rendered correctly. So its easy to see why this bit might have come late in the core libraries.
Technical Details
Message-ID:
<1232790841.28816.0@proxy01.news.clara.net>Path:
arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx02.iad.newshosting.com!newshosting.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.esat.net!news.clara.net!mephistopheles.news.clara.net!proxy01.news.clara.netReferences:
<1232705558.29604.0@proxy00.news.clara.net> <4979d5ba$0$5102$c30e37c6@pit-reader.telstra.net> <1232722601.22282.0@proxy00.news.clara.net> <slrngnlnm6.iib.armb@chiark.greenend.org.uk>Show Full Headers
Complete Article Headers
X-Google-Thread: 1103af,6a2553391b83dd8d X-Google-Thread: 102f53,6a2553391b83dd8d X-Google-Attributes: gid1103af,gid102f53,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx02.iad.newshosting.com!newshosting.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.esat.net!news.clara.net!mephistopheles.news.clara.net!proxy01.news.clara.net Date: Sat, 24 Jan 2009 09:50:40 +0000 From: The Natural Philosopher <a@b.c> User-Agent: Thunderbird 2.0.0.19 (Macintosh/20081209) MIME-Version: 1.0 Newsgroups: comp.os.linux.misc,cam.misc Subject: Re: Anyone know the CUPS system well? References: <1232705558.29604.0@proxy00.news.clara.net> <4979d5ba$0$5102$c30e37c6@pit-reader.telstra.net> <1232722601.22282.0@proxy00.news.clara.net> <slrngnlnm6.iib.armb@chiark.greenend.org.uk> In-Reply-To: <slrngnlnm6.iib.armb@chiark.greenend.org.uk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@clara.net (please include full headers) X-Trace: 5af04c20b95661094a4606685d61826a0563c80c67649ac06e86f744497ae539 NNTP-Posting-Date: Sat, 24 Jan 2009 09:54:01 +0000 Message-ID: <1232790841.28816.0@proxy01.news.clara.net> Lines: 28