bugFree UCS Outline Fonts - Bugs: bug #49110, Wrong dots on yāʼ-like Arabic...

 
 

bug #49110: Wrong dots on yāʼ-like Arabic letters

Submitter:  David Corbett <dscorbett>
Submitted:  Sat 17 Sep 2016 04:01:03 PM UTC
   
 
Category:  individual character(s) Severity:  3 - Normal
Item Group:  glyph(s) incorrect Status:  Fix posted
Privacy:  Public Assigned to:  Stevan_White
Open/Closed:  Open Release:  * development
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Sun 30 Oct 2016 05:30:30 PM UTC, comment #3: 

Hi,

See the small test attached.  Fix in SVN.

Yeah, it wasn't hard to change, once I understood what was needed and remembered how I set up the glyph decomposition table.  Here, in effect it picks out the pattern of dots beneath the letter.

Thanks, David!

(file #38842)

Steve White <Stevan_White>
Group administrator
Sun 30 Oct 2016 12:10:34 AM UTC, comment #2: 

The definitive references are The Unicode Standard 9.0 ch. 9 pp. 381–384, which explains the concept of Joining_Group, and ArabicShaping.txt, which defines the Joining_Group of each Arabic letter. U+063D, U+063E, U+063F, and U+06CE have Joining_Group=Farsi_Yeh, which means they have two dots below in the initial and medial forms and no dots below in the final and isolated forms.

U+0678 has Joining_Group=Yeh, which means it has the same number of dots below in all forms (in this case, zero). L2/11-092 suggests that maybe it should be Farsi_Yeh, but nothing seems to have come of that suggestion. Since U+0678 is the front vowel corresponding to the dotless U+0649, it stands to reason that U+0678 should be dotless too.

David Corbett <dscorbett>
Sat 29 Oct 2016 10:01:45 PM UTC, comment #1: 

I'm going to have to do some research on this one.

I have some notes from when I made the letters.  Perhaps you could look at these references, and guide me to a definitive reference.

The sad sad tale of the BARREE YEH
http://archives.miloush.net/michkap/archive/2010/04/19/9997912.html

Arabic character notes
http://rishida.net/scripts/block/arabic

Thanks!

Steve White <Stevan_White>
Group administrator
Sat 17 Sep 2016 04:01:03 PM UTC, original submission:  

The following should have two dots below in the initial and medial forms in FreeSerif.

  • U+063D ARABIC LETTER FARSI YEH WITH INVERTED V
  • U+063E ARABIC LETTER FARSI YEH WITH TWO DOTS ABOVE
  • U+063F ARABIC LETTER FARSI YEH WITH THREE DOTS ABOVE
  • U+06CE ARABIC LETTER YEH WITH SMALL V


The following should not have dots in the initial and medial forms in FreeMono.

  • U+0678 ARABIC LETTER HIGH HAMZA YEH
David Corbett <dscorbett>

 

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Attached Files
file #38842:  yeh.html added by Stevan_White (2KiB - text/html)

 

Depends on the following items: None found

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-10-30 Stevan_White Attached File- Added yeh.html, #38842
        StatusNeed info Fix posted
    2016-10-29 Stevan_White StatusNone Need info
        Assigned toNone Stevan_White

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