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


bug #41892: Malayalam rendering issues

Submitted by:  Baiju M <baijum81>
Submitted on:  Tue Mar 18 09:08:48 2014  
Category: character rangeSeverity: 3 - Normal
Item Group: character substitution issueStatus: Proceeding
Privacy: PublicAssigned to: Steve White <Stevan_White>
Open/Closed: OpenRelease: development

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Fri Mar 21 21:23:15 2014, 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>
Project AdministratorIn charge of this item.
Fri Mar 21 07:11:01 2014, 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>
Project AdministratorIn charge of this item.
Wed Mar 19 22:57:07 2014, 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>
Project AdministratorIn charge of this item.
Wed Mar 19 20:08:13 2014, 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 Mar 19 19:19:44 2014, 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>
Project AdministratorIn charge of this item.
Tue Mar 18 09:08:48 2014, 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 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri Mar 21 07:11:01 2014Stevan_WhiteStatusNeed info=>Proceeding
    Wed Mar 19 19:20:23 2014Stevan_WhiteCategoryoverall font problem=>character range
      Item GroupNone=>character substitution issue
      StatusNone=>Need info
      Assigned toNone=>Stevan_White
    Tue Mar 18 09:08:48 2014baijum81Carbon-Copy-=>Added -unavailable-

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