[Okular-devel] [okular] [Bug 336243] New: Japanese text (hiragana, katakana, and kanji) is sometimes not displayed

[Brian Christ]

https://bugs.kde.org/show_bug.cgi?id=336243

            Bug ID: 336243
           Summary: Japanese text (hiragana, katakana, and kanji) is
                    sometimes not displayed
    Classification: Unclassified
           Product: okular
           Version: 0.19.1
          Platform: Archlinux Packages
               URL: http://imgur.com/a/pdqC5#0
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: shvelven at gmail.com

There is a particular PDF which fails to display Japanese glyphs (hiragana,
katakana, and kanji), but only on Okular (see Additional Information and Steps
to Reproduce). Copying a line of text and pasting into another program will not
copy the Japanese glyphs, indicating that it is more than just a failure to
render. 

The PDF displays properly in every other PDF viewer I tested with, leading me
to conclude that it is a (rare) bug in Okular and not a bug in the PDF itself.

I have included an imgur album of screenshots with descriptions.

Reproducible: Always

Steps to Reproduce:
1. Download the PDF from this page:
http://grammar.nihongoresources.com/doku.php#download_the_book_as_free_pdf
2. Open in Okular
3. Go to any page with Japanese text (Section 1.1.3 on page 6 is a good
example)
Actual Results:  
The English text is displayed, while Japanese text is not. There are obvious
gaps in the lines where the Japanese text would be if it were rendered. 

Expected Results:  
I would expect the Japanese text to be rendered.

I have opened many Japanese-language PDFs in Okular, and this is the only one
to have given me problems. The PDF also renders properly in other viewers. So
far, I have tested the following (all on the same PC):

* Okular
* Firefox's built-in PDF viewer
* Master PDF Editor
* Adobe Reader 9

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