Bug 21061 - Font rendering problems with pdfLaTeX and T1 fonts
Summary: Font rendering problems with pdfLaTeX and T1 fonts
Status: RESOLVED FIXED
Alias: None
Product: poppler
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: poppler-bugs
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-04-05 09:24 UTC by Thomas Zell
Modified: 2010-09-03 11:13 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
PDF file with bad rendering (21.31 KB, application/pdf)
2009-04-05 09:24 UTC, Thomas Zell
Details
LaTeX source (149 bytes, text/x-tex)
2009-04-05 09:24 UTC, Thomas Zell
Details
Okular rendering (1.06 KB, image/png)
2009-04-05 09:25 UTC, Thomas Zell
Details
Acrobat Reader rendering (781 bytes, image/png)
2009-04-05 09:25 UTC, Thomas Zell
Details
xpdf rendering (1.31 KB, image/png)
2009-04-05 09:25 UTC, Thomas Zell
Details

Description Thomas Zell 2009-04-05 09:24:12 UTC
Created attachment 24576 [details]
PDF file with bad rendering

Okular has a problem with certain PDF files generated by pdfLaTeX. The
characters appear too thin and are difficult to read.

Attachments include a PDF file triggering this problem and the corresponding
LaTeX source file.

I also attached screenshots from Acrobat Reader and xpdf which render the file
correctly for comparison.

Please note, that the rendering looks fine if there are no T1 encoded fonts
used (However T1 fonts are required to properly typeset German texts with
umlauts).
Comment 1 Thomas Zell 2009-04-05 09:24:51 UTC
Created attachment 24577 [details]
 LaTeX source
Comment 2 Thomas Zell 2009-04-05 09:25:15 UTC
Created attachment 24578 [details]
Okular rendering
Comment 3 Thomas Zell 2009-04-05 09:25:27 UTC
Created attachment 24579 [details]
Acrobat Reader rendering
Comment 4 Thomas Zell 2009-04-05 09:25:39 UTC
Created attachment 24580 [details]
xpdf rendering
Comment 5 Thomas Zell 2009-04-05 11:03:48 UTC
I'm using OpenSuSE 11.1. I've seen the same problem ocurring on Kubuntu. This bug report might be related:
https://bugs.launchpad.net/ubuntu/+source/kdegraphics/+bug/48146
Comment 6 Thomas Zell 2010-09-03 10:27:52 UTC
This has been fixed since quite a while (poppler version 0.12 definitely works).
Comment 7 suzuki toshiya 2010-09-03 11:13:12 UTC
Hi, thank you for updating the status!
I think this issue is related with the poppler's default setting of hinter for FreeType2.
It was disabled by default since 2009-Oct-6.

I made a comparison of the font rasterization results by latest FreeType2 with
hinter enabled/disabled:

https://www.codeblog.org/blog/mpsuzuki/images/20100904_0.png

You can find the dropout issue can occur by the latest FreeType2 when hinter is enabled.
When you find similar problem in other application, please remind this.


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