[HarfBuzz] Fwd: Where to report a bug with Tamil text rendering in LibreOffice?

Shriramana Sharma samjnaa at gmail.com
Mon Aug 22 06:31:22 PDT 2011

Just forwarding this LibreOffice bug report of mine here to ensure that 
HB-NG doesn't make the same mistake. (I am not saying that it does, as a 
I don't have any actual application using HB-NG in which to test.)

Or are such things out of the purview of HB?


-------- Original Message --------
Subject: Where to report a bug with Tamil text rendering in LibreOffice?
Date: Mon, 22 Aug 2011 18:56:11 +0530
From: Shriramana Sharma <samjnaa at gmail.com>
To: users at global.libreoffice.org

I am using LibreOffice 3.3.3 on Kubuntu Natty and 3.4.2 on Windows XP. 
On both installations I observe the following bug:

In Tamil, vowelless consonants are considered independent grapheme 
clusters on their own as they do not ligate with following consonants 
unlike other Indic scripts. (The only exception is க் ligating with ஷ to 
form க்ஷ.)

Take for example the Tamil word சித்திரை (name of a month). The grapheme 
cluster split-out is: சி|த்|தி|ரை and not சி|த்தி|ரை. However, when my 
cursor is to the left of த் and I press the right-cursor key, the cursor 
moves to the right of தி, and vice versa with left-cursor key. Obviously 
LibreOffice considers த்தி as a single cluster. Other applications (like 
for example Thunderbird which I am using to compose this mail) correctly 
treat த் and தி as separate grapheme clusters.

This faulty behaviour is seen for all CONSONANT + VIRAMA + CONSONANT 
sequences in Tamil in LibreOffice.

Should I report this against LibreOffice in the FreeDesktop Bugzilla  or 
elsewhere against some other rendering library that LO uses?

Shriramana Sharma

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