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bug#55319: 28.1.50; Abugida not rendered correctly (MacOS)
From: |
Robert Pluim |
Subject: |
bug#55319: 28.1.50; Abugida not rendered correctly (MacOS) |
Date: |
Thu, 12 May 2022 10:10:56 +0200 |
>>>>> On Wed, 11 May 2022 23:43:36 +0800, Kai Ma <justksqsf@gmail.com> said:
>> On May 9, 2022, at 10:38, Eli Zaretskii <eliz@gnu.org
<mailto:eliz@gnu.org>> wrote:
>>
>> Emacs doesn't discover composition rules. The composition rules are
>> part of the Emacs code, see the various *.el files in lisp/language/
>> directory. Some of these composition rules are derived automatically
>> from character properties, see composite.el and characters.el (which
>> cannot happen without Emacs knowing up-front about the properties).
Kai> Thanks for this. I didn’t know Emacs needed to manually compose
characters.
Kai> Feel free to close this report, since it is due to my
misunderstanding, not a real problem nor a real “wishlist”.
Kai> BTW,
Kai> I did try to follow language/*.el, and come with up the following code:
Kai> (let* ((c "[\uED80-\uED9F]\\|\uEDAA\\|\uEDAB”) ; constant
ie: "[\uED80-\uED9F\uEDAA\uEDAB]”
Kai> (v "[\uEDA0-\uEDA9]”) ; vowel
Kai> (cv (concat v c)))
You've called this 'cv', but itʼs actually 'vc'.
Kai> (set-char-table-range
Kai> composition-function-table '(#xeda0 . #xeda9)
Kai> (list
Kai> (vector cv 1 #'zbalermorna-shape-gstring)
Kai> [nil 0 font-shape-gstring])))
Youʼre looking back from vowels, it might be easier to add entries for
the consonants and look forward.
Kai> (defun zbalermorna-shape-gstring (gstring direction)
Kai> (message "shape %s" gstring) ; debugging
Kai> gstring)
Kai> But it doesn’t work as expected. For example, “ka” should be
Kai> composed, but the behavior here is “a” itself is composed,
Kai> and when the first rule is matched, only the consonant “k” is
Kai> sent to font-shape-gstring: only “k” is in the header.
Kai> Have you any pointers? Thanks!
I think if you fix 'cv' this will work.
Robert
--
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Kai Ma, 2022/05/08
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Eli Zaretskii, 2022/05/08
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Kai Ma, 2022/05/09
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Eli Zaretskii, 2022/05/08
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Kai Ma, 2022/05/11
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Eli Zaretskii, 2022/05/11
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS),
Robert Pluim <=
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Kai Ma, 2022/05/12
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Robert Pluim, 2022/05/12
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Eli Zaretskii, 2022/05/12
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Robert Pluim, 2022/05/12
- bug#55319: 28.1.50; Abugida not rendered correctly (MacOS), Eli Zaretskii, 2022/05/12