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bug#5080: indic text is not displayed correctly in emacs shell

From: Praveen A
Subject: bug#5080: indic text is not displayed correctly in emacs shell
Date: Thu, 3 Dec 2009 17:37:18 +0530

2009/12/3 Kenichi Handa <address@hidden>:
> In article <address@hidden>, Praveen A <address@hidden> writes:
>> Thanks. I will request fedora and debian emacs maintainers to include this.
> That's good, thank you.

The request is filed.

> No, no, you must specify "Rachana" (if it is the font family
> name) in place of "FONT_FAMILY_NAME" as this:
> (set-fontset-font t 'malayalam '("rachana" . "unicode-bmp"))
> I installed rachana font and confirmed that the above code
> worked.

Thanks. It works for me now. But how to make it default? Where does
emacs take this information from ?

I have my fontconfig preferences to prefer Meera, but emacs does not
respect that and takes Lohit Malayalam instead.

So from emacs point of view issue (3) is resolved. I have filed
another bug for issue (2). Issue (4) still needs attention.

(4a) Why is it taking Lohit Malayalam by default
(4b) Why is the display cluttered/overlapped with some fonts like Meera

(1a) now with your patch, emacs handles ZWJ
(1b) There is a problem with Lohit Malayalam, I had a discussion with
Lohit developer (Pravin Satpute) and he says it is an issue with
m17n/redering engine.

Meera and Rachana uses substitution for complex glyphs, but Lohit uses
some fatures of OpenType specification and which needs to be
implemented in rendering engine used by emacs.

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