| Summary: | Ghostscript does not reproduce bold text correctly when converting PostScript output of OpenOffice to PDF | ||
|---|---|---|---|
| Product: | Ghostscript | Reporter: | Till Kamppeter <till.kamppeter> |
| Component: | PDF Writer | Assignee: | Ken Sharp <ken.sharp> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | critical | ||
| Priority: | P4 | ||
| Version: | master | ||
| Hardware: | All | ||
| OS: | All | ||
| URL: | https://bugs.launchpad.net/ubuntu/+source/ghostscript/+bug/314018 | ||
| Customer: | Word Size: | --- | |
| Attachments: |
openoffice-bold-ps-output.ps
ps2pdf-gs-864.pdf ps2pdf-gs-863.pdf results.tif |
||
|
Description
Till Kamppeter
2009-01-05 11:31:14 UTC
Created attachment 4679 [details]
openoffice-bold-ps-output.ps
PostScript output of OpenOffice.org (print to file), with bold text
Created attachment 4680 [details]
ps2pdf-gs-864.pdf
Output of the command line
GS_LIB=Resource/Init/ bin/gs -sDEVICE=pdfwrite -dPDFSETTINGS=/printer
-sOutputFile=ps2pdf-gs-864.pdf openoffice-bold-ps-output.ps
executed in the source directory of Ghostscript, current SVN snapshot, after
compiling.
Originally bold letters are not bold any more.
Created attachment 4681 [details]
ps2pdf-gs-863.pdf
Output of
ps2pdf openoffice-bold-ps-output.ps ps2pdf-gs-863.pdf
on an Ubuntu Intrepid system with Ghostscript 8.63. GS 8.63 was rebuilt without
the CJK patches. So the problem is not caused by the CJK patches.
The originally bold text is completely distorted.
As I did not install 8.64 yet, I do not know whether the complete distortion is caused by the way how ps2pdf or /usr/lib/cups/filter/pstopdf call Ghostscript or whether most of the problem is already fixed in 8.64 and only a "last polish" is needed. Now I have also tested with an installed Ghostscript 8.64, so that I could actually use ps2pdf. This gives the same result as my test with the GS 8.64 in the source tree. The originally bold font comes out readable but not bold. Created attachment 4683 [details]
results.tif
Till, I've taken a look at this, and I don't see a problem. Probably I'm
missing something obvious.
The 8.63 output exhibits the well known (to me) issue with incorrect stroke
widths, there have been a number of fixes in this area, and I thought this was
now correct. I agree that the text in 8.64 does not seem especially bold, but
there is emboldening taking place.
If you open the files in Acrobat, select some of the text, and then right-click
and select properties, the dialog shows that the text has a 0.4 stroke width.
That is, the text is first drawn, and then outlined with a stroke, which
effectively makes it bolder. The 8.63 code got the width of the stroke
incorrect.
Now, I've taken your file, converted to PDF using GS (HEAD) and again using
Acrobat Distiller 7. I then used the HEAD GS revision to render all three files
(original PostScript and both PDF files) at 600 dpi. To my eye the results are
effectively identical (there are some minor pixel differences).
I've attached a screenshot here, the top window (orig.pbm) is the result of GS
on the original PostScript file. The middle window (out.pbm) is the result of
rendering the GS PDF file. The bottom window is the result of rendering the PDF
produced by Acrobat.
I also ran the PDF file you sent from 8.64 (not pictured in screen shot) and it
looks identical to the other outputs.
Can you explain what is wrong ?
I have checked it with Ghostscript (gv) as screen renderer now. The input and output really look identical now. Poppler (renderer of evince) seems to have bug here. Thanks Till, glad to hear its OK. This is a duplicate of bug #689970. Marking as such. *** This bug has been marked as a duplicate of 689970 *** |