Thanks, Brian. I played with TitlePref and cost factor just now. And use strings pdfoutputfile | grep Title
to see anything interesting. After processing a tmp.c under 4 different conditions, I got the following results: - - /Title(tmp.c) 【TitlePref 0, cost factor 65】 - /Title(tmp.c) 【TitlePref 1, cost factor 65】 - /Title(\(\(stdin\)\))>>endobj 【TitlePref 0, cost factor 66】 - /Title(\(\(stdin\)\))>>endobj 【TitlePref 1, cost factor 66】 It seems as long as cost factor is 66, argv[3]=stdin. Changing TitlePref apparently can't help me any. Xiaolin -- 王晓林 On Tue, Jun 18, 2013 at 7:20 PM, Brian Potkin <claremont...@gmail.com>wrote: > On Mon 17 Jun 2013 at 17:35:19 +0800, 王晓林 wrote: > > > Yeah, I just tried 300, 600, 1200, 2400dpi while setting cost factor to > 66. > > Higher DPI value indeed results better PDF quality. But I still prefer > cost > > factor 65, because > > > > 1. Size matters. With same dpi value, cost factor 65 results in a much > > smaller PDF file. Examples: > > - 66-2400dpi.pdf is 15523 bytes > > - 65-2400dpi.pdf is 8386 bytes > > 2. Name matters. Processing a hello.c file into a PDF, > > - With cost factor 65, it give me a hello.pdf > > - With cost factor 66, it always give me a _stdin_.pdf. So I have > to > > rename it to something else before it's overwritten by next run. > > This is a very sound argument and, after all, you are only reverting to > the way Squeeze deals with PostScript files sent to cups-pdf. However, > I just wanted to tidy up a loose end or two, so thanks for confirming > that PDF quality does not depend on cost factor. And thank you for the > level of detail you have provided during discussion. > > Always getting _stdin_.pdf results from a combination of a number of > things. In the first place the name originates from the method used by > Emacs to send the file to CUPS. Then CUPS simply processes the file in a > normal and, as far as I can tell, non-buggy, way. We see this in your > error_log: > > D [13/Jun/2013:10:44:42 +0800] [Job 102] argv[3]="(stdin)" > > argv[3] is the job title and is used on the command lines of pstopdf, > pdftopdf and pdftops. If TitlePref is 1 in /etc/cups/cups-pdf.conf then > argv[3].pdf becomes the output filename. > > For a TitlePref of 0 (the default) the output filename is taken from > %Title in the PostScript file received from CUPS *after filtering by > pdftops*. pdftops contructs a %Title from the job title. > > Cheers, > > Brian. > >
