Please describe the problem:
https://bugzilla.redhat.com/show_bug.cgi?id=242016

Opened by Manilal (libregeek@gmail.com)  	 on 2007-06-01 05:53 EST  	[reply]  	   Private

Description of problem:
The malayalam fonts rendered wrongly in mozilla firefox. This occurs for Chillu
and some koottaksharams like "nte". There are also issues when rendering
ya(?)+chandrakala(?)+va (?) and some other similar characters. I have attached a
screenshot which indicates the issues.

Version-Release number of selected component (if applicable):
Fedora Core 6
pango-1.14.10-1.fc6
firefox-1.5.0.12-1.fc6
fonts-malayalam-2.1.5-1.fc6

How reproducible:
Always

Steps to Reproduce:
1.Visit the page http://ml.wikipedia.org/wiki/%E0%B4%86%E0%B4%A8  or
http://ml.wikipedia.org/wiki/ in firefox
2.
3.
  
Actual results:
Refer the attachment

Expected results:


Additional info:


Comment #1 From Manilal (libregeek@gmail.com) 	on 2007-06-01 05:53 EST 	[reply] 	Private

Created an attachment (id=155867) [edit]
Screenshot of malaylam page in firefox


Comment #2 From A S Alam (aalam@redhat.com) 	on 2007-06-01 06:07 EST 	[reply] 	Private

have you same problem in konqueror and gedit?


Comment #3 From Manilal (libregeek@gmail.com) 	on 2007-06-01 06:32 EST 	[reply] 	Private

Created an attachment (id=155868) [edit]
Screenshot of malayalam page in Konqueror and Gedit


Comment #4 From Manilal (libregeek@gmail.com) 	on 2007-06-01 06:34 EST 	[reply] 	Private

When compared with konqueror, firefox has less errors. But it's interesting to
see that chillu errors are solved in konqueror but there are lots of
koottaksharam errors.


Comment #5 From A S Alam (aalam@redhat.com) 	on 2007-06-01 06:39 EST 	[reply] 	Private

ok, so can you please open another bug for qt (rendering) for koottaksharam?


Comment #6 From A S Alam (aalam@redhat.com) 	on 2007-06-01 06:41 EST 	[reply] 	Private

and yes, are you please add unicode for those combinations like

0d0c + od4d+????

you can use Malayalam Unicode chart from:
http://www.unicode.org/charts/PDF/U0D00.pdf


Comment #7 From Manilal (libregeek@gmail.com) 	on 2007-06-01 07:06 EST 	[reply] 	Private

I am not an expert in unicode and has less knowledge about how the glyphs are
stored. However I will try to get help from some experts about this issue.


Comment #8 From Praveen A (pravi.a@ippimail.com) 	on 2007-06-01 08:02 EST 	[reply] 	Private

Lets look at the issues one by one. 

1) Not rendering chillu properly
This has got to do with wrong input and not a problem with rendering
Earlier pango used to render consonent+chandrakala without ZWJ as chillu now
when it is corrected text entered earlier has also need to be corrected.

?+?+ZWJ - ???
2) ???????????? is due to a wrong sequence selected in Microsoft Open Type
specification
It can be fixed using suruma patch for pango ( http://suruma.sarovar.org ) and a
font modified to work with it.

3) ????????????? This is bug in pango that need to be fixed
http://bugzilla.gnome.org/show_bug.cgi?id=441654

For now it can be worked around by adding a ZWNJ after ???
?+?+ZWJ+ZWNJ+?+?+?

4) ??? samvruthokaram is not yet supported. I guess it has to be supported at font
level.

5)  ????????? refer 3

6) ???? the problem is bug introduced by Fedora developers to fix rendering of
lohit_ml new lipi font by adding an exception and which broke the traditional
lipi rendering.

http://bugzilla.gnome.org/show_bug.cgi?id=357790

It could be solved by including popular traditional lipi fonts like Rachana and
Anjali to Fedora

Most of the issues except for 3 can be solved by using suruma patched pango.


Comment #9 From Manilal (libregeek@gmail.com) 	on 2007-06-01 08:09 EST 	[reply] 	Private

I have some more screenshots using the rachana and anjali fonts. The anjali
seems to have less errors in firefox. The anjali fonts can be downloaded from :

https://savannah.nongnu.org/forum/forum.php?forum_id=4730
http://varamozhi.wikia.com/wiki/Varamozhi


Comment #10 From Manilal (libregeek@gmail.com) 	on 2007-06-01 08:14 EST 	[reply] 	Private

Created an attachment (id=155873) [edit]
Screenshots of firefox and konqueror using Rachana and Anjali



Steps to reproduce:


Actual results:


Expected results:


Does this happen every time?


Other information: