Some vowel combinatons of Telugu TSA and DZA don't work properly

[GoogleCodeExporter]

It seems to me from some early testing that some of the combinations on 
http://www.unicode.org/L2/L2015/15082-telugu-sym.pdf don't work right. 
Assigning to myself to investigate.

Original issue reported on code.google.com by roozbeh@google.com on 24 Apr 2015 at 7:38

[GoogleCodeExporter]

From my testing, the combinations TSA+AA and DZA+AA are definitely rendered 
incorrectly in Noto.

Also, it seems that the DZA should act like JA when joining with U and UU, but 
it doesn't.

Attaching screenshots of TSA+AA, DZA+AA, DZA+U, and DZA+UU, comparing them to 
equivalent CA and JA sequences.

Original comment by roozbeh@google.com on 27 Apr 2015 at 4:45

• Changed title: Some vowel combinatons of Telugu TSA and DZA don't work properly

Attachments:

• noto.png

[GoogleCodeExporter]

The report of  challa.anilkumar@gmail.com shows dotted circles when these 
consonants are followed by vowels. That is what I was seeing in the software 
available to test the fonts during the design process. That means that at the 
time these characters were too new to be supported. 

I no longer get dotted circles in Windows 8.1 at least.

We would have to decide whether to invest in an upgrade of the existing 
versions, or if this can wait until the one that is the plans. 

Original comment by jelle.bo...@monotypeimaging.com on 27 Apr 2015 at 9:36

[GoogleCodeExporter]

Jelle, I don't know what software the submitter of the document is using. 
That's irrelevant to us.

These characters are defined in Unicode 5.1, published in March 2008. (They 
have also been supported in HarfBuzz for years.) We definitely consider this 
bug part of the existing phase.

Original comment by roozbeh@google.com on 27 Apr 2015 at 4:07

[GoogleCodeExporter]

While I can understand that this may be considered a technical bug against the 
specification for the existing phase, I just want to record the fact that 
neither of these characters is actually used anywhere outside of the works of 
the 19th Century Telugu linguist and writer C.P. Brown, who invented them to 
record sound distinctions not normally captured in Telugu script.

Original comment by t...@tiro.com on 27 Apr 2015 at 5:11