bugFree UCS Outline Fonts - Bugs: bug #41892, Malayalam rendering issues


bug #41892: Malayalam rendering issues

Submitter:  Baiju M <baijum81>
Submitted:  Tue 18 Mar 2014 09:08:48 AM UTC
Category:  character range Severity:  3 - Normal
Item Group:  character substitution issue Status:  Fix posted
Privacy:  Public Assigned to:  Stevan_White
Open/Closed:  Open Release:  * development
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Tue 31 Oct 2017 07:54:07 PM UTC, comment #6: 


After a wait of some years, I got back to this.

I have ripped out all references to the 'MLR ' language tag from the font, since even if the bug were fixed now, it wouldn't be reflected in many systems for years.

Let me know if you're aware of further problems.

Steve White <Stevan_White>
Group administrator
Fri 21 Mar 2014 09:23:15 PM UTC, comment #5: 


The commit I just made to FreeSerif implements the two conjunct forms you pointed out: sa-rra-rra and na-rra.  The first I had implemented before but broken; the second--I'm not sure it was ever implemented properly before.


Steve White <Stevan_White>
Group administrator
Fri 21 Mar 2014 07:11:01 AM UTC, comment #4: 


I just committed changes to FreeSerif regarding the changes to the Unicode standard for zero and one-quarter.

And I see the (two) conjunct formation issues you poined out in your mail, and am working on them.

Again, besides these issues, the font seems to work well in Windows 7.  We are still thinking about what to do about the problems in Linux -- we may have to resort to work-arounds.

Steve White <Stevan_White>
Group administrator
Wed 19 Mar 2014 10:57:07 PM UTC, comment #3: 


I was unaware of the issue with the zero digit.

I'll send you some proofs off-line for you to check.


Steve White <Stevan_White>
Group administrator
Wed 19 Mar 2014 08:08:13 PM UTC, comment #2: 

Sure, I will try to test as an end user. I don't have much idea about font technology.  I have added SMC mailing list in CC here.

Issue #1: Glyph for "Malayalam Digit Zero" U+0D66 should be changed
See these docs for reference:


Fonts like Rachana & Lohit has changed the glyph as given in the above doc.

Baiju M <baijum81>
Wed 19 Mar 2014 07:19:44 PM UTC, comment #1: 

Hi, Baiju,

Part of what you are seeing is due to a Harfbuzz bug, which makes the "reformed" Malayalam script the default for Malayalam.  Unfortunately, the SVN version of FreeFont makes a distinction.

Would you like to do a bit of testing for us?

Steve White <Stevan_White>
Group administrator
Tue 18 Mar 2014 09:08:48 AM UTC, original submission:  

I used the latest svn trunk version of FreeSans.sfd and generated TTF files and I found many rendering issues.

I used the test file available here:

I compared this against Lohit & Rachana fonts:

Please let me know if any other details required.

Baiju M <baijum81>


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    Follow 7 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-10-31 Stevan_White StatusProceeding Fix posted
    2014-03-21 Stevan_White StatusNeed info Proceeding
    2014-03-19 Stevan_White Categoryoverall font problem character range
        Item GroupNone character substitution issue
        StatusNone Need info
        Assigned toNone Stevan_White
    2014-03-18 baijum81 Carbon-Copy- Added -email is unavailable-

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