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bug#5081: zwj should not be ignored in indic text
From: |
Praveen A |
Subject: |
bug#5081: zwj should not be ignored in indic text |
Date: |
Tue, 1 Dec 2009 16:54:14 +0530 |
2009/12/1 Kenichi Handa <handa@m17n.org>:
>> ZWJ is required to display some characters (like Malayalam chillu or
>> pure consonants) in many indic languages (Persian and Arabic also
>> needs these characters). These should not be ignored while displaying
>> indic text.
>
> Please try to evaluate this:
>
> (let ((script-regexp-alist
> `((devanagari . "[\x900-\x97F\x200C\x200D]+")
> (bengali . "[\x980-\x9FF\x200C\x200D]+")
> (gurmukhi . "[\xA00-\xA7F\x200C\x200D]+")
> (gujarati . "[\xA80-\xAFF\x200C\x200D]+")
> (oriya . "[\xB00-\xB7F\x200C\x200D]+")
> (tamil . "[\xB80-\xBFF\x200C\x200D]+")
> (telugu . "[\xC00-\xC7F\x200C\x200D]+")
> (kannada . "[\xC80-\xCFF\x200C\x200D]+")
> (malayalam . "[\xD00-\xD7F\x200C\x200D]+"))))
> (map-char-table
> #'(lambda (key val)
> (let ((slot (assq val script-regexp-alist)))
> (if slot
> (set-char-table-range
> composition-function-table key
> (list (vector (cdr slot) 0 'font-shape-gstring))))))
> char-script-table))
Now it is displayed as a separate glyph, but there is no substitution
happening. ണ + ് + ZWJ should be displayed as one glyph (gpos
substitution).
> If it still doesn't work, please tell me the version numbers
> of libotf and libm17n-flt, and also tell me which font is selected
> for Malayalam.
It started working after I changed the default font to Rachana. It
also worked with Meera, but there is another problem when using Meera
https://savannah.nongnu.org/bugs/?28129 ttf-freefont is coming as a
default. I confirmed the need for above code by setting Rachana as
default font without the above code and I can confirm, the above code
is required to display zwj.
>
> % pkg-config --modversion libotf
> % pkg-config --modversion m17n-flt
libotf 0.9.10
m17n-flt 1.5.4
- Praveen
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emacs-zwj-after.png
Description: PNG image
zwj-with-rachana.png
Description: PNG image
- bug#5081: zwj should not be ignored in indic text,
Praveen A <=