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bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appr
From: |
Robert Pluim |
Subject: |
bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate |
Date: |
Fri, 02 Jun 2023 15:58:37 +0200 |
>>>>> On Fri, 02 Jun 2023 15:58:05 +0300, Eli Zaretskii <eliz@gnu.org> said:
>> CHAR+VS-15 and CHAR+VS-16 correctly choose text and emoji
>> representation, but CHAR+VS-15 results in the text representation only
>> if CHAR is not an emoji. If it is an emoji, the font selected for it
>> will always be the emoji font.
Eli> And an Emoji font, when presented with CHAR+VS-15 sequence doesn't
Eli> produce a textual-representation glyph for CHAR? I'd expect it to.
No.
Eli> If Emoji fonts don't produce textual-representation glyphs in this
Eli> case, I wonder how can this work at all. Because if we select some
Eli> non-Emoji font, it will probably not know about VS-15, so we will be
Eli> left with VS-15. Are we supposed to handle that ourselves, instead of
Eli> relying on the font and the shaping engine?
>> Iʼve tried forcing font_range to use the font for the 'symbol' script
>> for EMOJI+VS-15, instead, but that resulted in composition
>> failing.
Itʼs finding what appears to be the default system font, not whatʼs
specified in the fontset for 'symbol', so thatʼs one reason why
composition fails. Even with 'use-default-font-for-symbols' nil.
Eli> That's what I'd expect: non-Emoji fonts don't know about VS-15.
Right
Eli> What does HarfBuzz's hb-view do with such sequences, when using Noto
Eli> Color Emoji font?
Sequence Font Result
23e9 fe0e system black box
23e9 fe0e Symbola correct text representation
23e9 fe0e NotoEmoji correct text representation
23e9 fe0e NotoColorEmoji blank
And on emacs-29, Symbola and NotoEmoji compose that sequence
correctly. Now I just need to persuade emacs-30 to use one of them.
Robert
--
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/01
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/01
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/01
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/01
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/02
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/02
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/02
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/02
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate,
Robert Pluim <=
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/03
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Eli Zaretskii, 2023/06/05
- bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate, Robert Pluim, 2023/06/05