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Bug 565599 - [te] treatment of telugu rutvam (u+0c43), deergarutvam(u+0c44) should be like lengthmarks for proper rendering, as they appear as last characters in a cluster
[te] treatment of telugu rutvam (u+0c43), deergarutvam(u+0c44) should be like...
Status: RESOLVED OBSOLETE
Product: pango
Classification: Platform
Component: indic
1.22.x
Other Linux
: Normal critical
: ---
Assigned To: Pango Indic
pango-maint
Depends on:
Blocks: 594101
 
 
Reported: 2008-12-25 06:57 UTC by arjuna rao chavala
Modified: 2012-08-18 17:43 UTC
See Also:
GNOME target: ---
GNOME version: 2.21/2.22


Attachments
svn diff file for indic module (1.55 KB, patch)
2008-12-25 07:07 UTC, arjuna rao chavala
none Details | Review
diff file for 1.24.1 version (533 bytes, patch)
2009-05-31 11:03 UTC, arjuna rao chavala
none Details | Review

Description arjuna rao chavala 2008-12-25 06:57:02 UTC
[te] treatment of telugu rutvam (u+0c43), deergarutvam(u+0c44) should be like lengthmarks for proper rendering, as they appear as last characters in a cluster.
Reported in Ubuntu bugs.
https://bugs.launchpad.net/ubuntu/+source/ttf-indic-fonts/+bug/219949
Comment 1 arjuna rao chavala 2008-12-25 07:00:22 UTC
This is similar to Kannada language.
This can be tested with telugu transliteration of word like sanskrutamu.
Comment 2 arjuna rao chavala 2008-12-25 07:07:54 UTC
Created attachment 125292 [details] [review]
svn diff file for indic module 

This fix is found to be working properly.
Comment 3 arjuna rao chavala 2009-04-26 07:33:49 UTC
Additional information to justify the fix provided  with reference to Unicode standard is provided below,
As per  9.8  of unicode standard  about Kannada( http://www.unicode.org/versions/Unicode5.1.0/) I quote 
                "This script is very closely related to the Telugu script both in the shapes of the
letters and in the behavior of conjunct consonants."
Hence the treatment of   the characters should be similar to that of Kannada. As I know both Telugu and Kannada, I have verified that after the suggested fix, the problem in Telugu is corrected. 
Additional explanation is that the phonetic order  is being violated, as in word sanskrutamu, the  vattu variation of letter  ka should be followed by the dependent vowel variation. Unfortunately the order is getting reversed with 1.22 version of the code.

 
Comment 4 arjuna rao chavala 2009-05-31 11:03:38 UTC
Created attachment 135653 [details] [review]
diff file for 1.24.1 version

Diff file for latest version of source.
Comment 5 Parag AN 2009-10-01 08:00:33 UTC
Thanks Arjuna for your patch. I am proposing same in patch to 594101 bug.
Comment 6 arjuna rao chavala 2009-10-01 18:01:40 UTC
(In reply to comment #5)
> Thanks Arjuna for your patch. I am proposing same in patch to 594101 bug.

Thanks
Comment 7 arjuna rao chavala 2011-04-09 08:32:34 UTC
Patch did not get committed in 1.28.1.
Comment 8 Behdad Esfahbod 2012-08-18 17:43:10 UTC
We've merged the HarfBuzz branch.  Closing obsolete.