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bug#19993: 25.0.50; Unicode fonts defective on Windows
From: |
Eli Zaretskii |
Subject: |
bug#19993: 25.0.50; Unicode fonts defective on Windows |
Date: |
Sun, 08 Mar 2015 17:51:16 +0200 |
> Date: Sat, 7 Mar 2015 23:41:58 -0800
> From: Ilya Zakharevich <ilya@math.berkeley.edu>
> Cc: 19993@debbugs.gnu.org
>
> The following subrange is “identified”:
>
> 9 0400 - 04FF Cyrillic
> 0500 - 052F Cyrillic Supplement
> 2DE0 - 2DFF Cyrillic Extended-A
> A640 - A69F Cyrillic Extended-B
>
> What is actually supported:
>
> 0400 - 04FF Everything but 04d8,04d9 (Schwa, used in Cyrillic Azeri —
> but
> contemporary Azeri is written in Latin)
> 0500 - 052F Only 0500 - 0513, 051a - 051d supported
> 2DE0 - 2DFF None supported (5.1)
> A640 - A69F None supported (5.1 and later)
FWIW, on one system I use frequently (a pretty standard Windows 7
machine), the last two blocks are not supported by any font. Likewise
on another system, an XP with a lot of additional fonts installed.
But if I install GNU Unifont, then Emacs does use it for these blocks.
So somehow we do TRT in some situations. Maybe these subranges are
just a filter?
> Does it look like a good indication of anything? I would say no… Do
> you know any other tool looking at this bitmap for choosing which font
> to pick up for a particular character?
I guess by "tool" you mean a technique or algorithm that uses the font
data for selecting the appropriate font? If so, no, I know very
little in this area, on Windows or elsewhere. Enumerating all the
glyphs would work, but is probably prohibitively expensive.
- bug#19993: 25.0.50; Unicode fonts defective on Windows, (continued)
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Ilya Zakharevich, 2015/03/13
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Eli Zaretskii, 2015/03/13
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Eli Zaretskii, 2015/03/08
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Ilya Zakharevich, 2015/03/06
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Eli Zaretskii, 2015/03/07
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Ilya Zakharevich, 2015/03/08
- bug#19993: 25.0.50; Unicode fonts defective on Windows,
Eli Zaretskii <=
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Ilya Zakharevich, 2015/03/08
- bug#19993: 25.0.50; Unicode fonts defective on Windows, Eli Zaretskii, 2015/03/08