[sword-devel] Devanagari text displays different in SWORD than in the source IMP file

Tim Chase tchase at maf.org
Tue Sep 8 09:54:57 MST 2009

Words including the zwj is where the problem shows up.  The zwnj works
correctly.  I can provide several example words that have the zwj if it
would be helpful and examples of correct and incorrect renderings.


-----Original Message-----
From: Chris Little [mailto:chrislit at crosswire.org] 
Sent: Tuesday, September 08, 2009 2:05 PM
To: SWORD Developers' Collaboration Forum
Subject: Re: [sword-devel] Devanagari text displays different in SWORD than
in the source IMP file

Before anyone starts making authoritative statements about ZWJ or ZWNJ 
in various modules and their reflexes in front ends, I would like to see 
some sort of proof that this is even relevant to the problem.

If ZWNJ is present in the module, it isn't being changed by Sword or by 
BibleCS. If you copy text from BibleCS and paste it into an editor that 
renders things correctly, such as BabelPad or Notepad, you get back the 
correct rendering--so it's not inserting, deleting, or changing codepoints.

My own feeling is that the problem lies in the renderer used by various 
front ends. And specific to BibleCS, I suspect we can fix the issue by 
compiling in a more recent version of C++Builder (which I'll try to do, 
when I get a chance, unless Troy beats me to it).

Font choice is important. You have to use a font with the correct font 
tables. (Graphite tables would work, but OpenType are entirely 
sufficient for this kind of Indic application.) However, the fonts named 
in the initial post and my testing further to that report demonstrate 
that even fonts with good OT tables won't render correctly in BibleCS's 
current renderer.


David Haslam wrote:
> Zero Width Joiner and non-Joiner
> We should gather the evidence we have collected about zwj & zwnj (in e.g.
> Devanagari) by adding a new row in the table on this wiki page.
> http://www.crosswire.org/wiki/Choosing_a_SWORD_program#Module_Support
> http://www.crosswire.org/wiki/Choosing_a_SWORD_program#Module_Support 
> Ideally, the new row should be below the one for Complex Scripts. This
> help clarify the situation for everyone.  A single footnote should provide
> the background and give the explanation.
> -- David Haslam

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