Bug 59118

Summary:	Lohit-Kannada renders ಚ್ಚ್ properly on Windows 8 but fails with harfbuzz
Product:	HarfBuzz	Reporter:	Pravin <pravin.d.s>
Component:	src	Assignee:	Behdad Esfahbod <freedesktop>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	freedesktop
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Pravin 2013-01-08 07:41:26 UTC

Not sure is this bug from Harfbuzz, Since Tunga renders perfectly at both places (usp10.dll and harfbuzz).

But point here is Tunga has 'knd2' defined and lohit is 'knda', still Uniscribe renders Lohit perfectly. 

i/p  <u0c9a u0ccd u0c9a u0ccd>  "ಚ್ಚ್"
- u0c9a (Cons)
- u0ccd (Virama)

Harfbuzz reorder it to  <u0c9a u0c9a u0ccd u0ccd>

Uniscribe reorder it to <u0c9a u0ccd u0c9a u0ccd>

Handling this in font is bit tricky.

Harfbuzz output:

[U0C9A=0+758|U0C9A_0CCD.blwf=0@-345,16+0|U0CCD=0+354], Making ligature from first and third is bit tricky part in this case.

Lohit ttf from master: http://pravins.fedorapeople.org/Lohit-Kannada.ttf

Comment 1 Behdad Esfahbod 2013-01-09 00:10:32 UTC

Fixed.

commit ecd454b3cd75050e0c95e1d2aa55744559338ec8
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Tue Jan 8 18:09:46 2013 -0600

    [Indic] In old-spec shaping, don't move viramas around if seq ends with one
    
    For example: u0c9a u0ccd u0c9a u0ccd with Lohit.  See:
    
    https://bugs.freedesktop.org/show_bug.cgi?id=59118

Comment 2 Pravin 2013-01-09 08:06:32 UTC

Tested with Lohit-Kannada and other kannada fonts like gubbi-fonts and navilu-fonts.
This works well now. 

Thanks for quick fix :)

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.