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Date: Sun, 8 Oct 2023 15:47:34 +0200
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Subject: Re: half- and full-width CJK characters
To: cygwin@cygwin.com
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Precedence: list
From: Thomas Wolff via Cygwin <cygwin@cygwin.com>
Reply-To: Thomas Wolff <towo@towo.net>
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Am 08/10/2023 um 14:55 schrieb Dr Bean via Cygwin:
> On Sat, 07 Oct 2023, Thomas Wolff via Cygwin wrote:
>
>>
>> Am 07/10/2023 um 14:47 schrieb Dr Bean via Cygwin:
>>> On Sat, 07 Oct 2023, Thomas Wolff via Cygwin wrote:
>>>
>>>> Am 07/10/2023 um 10:23 schrieb Dr Bean via Cygwin:
>>>>> I am memorializing this for my own benefit here.
>>>>>
>>>>> Benefitting fromhttps://eng-blog.iij.ad.jp/archives/12576
>>>>> I see that I don't need to change any envars, but only fonts.
>>>>>
>>>>> The default Lucida Console font renders CJK as half-width chars, on
>>>>> this PC with 3 Windows language packs.
>>>>>
>>>>> With MS ゴシック, Japanese かな and 漢字 look good.
>>>>> Traditional Chinese ㄅㄛˋㄆㄛˋㄇㄛˋand 漢字 look good.
>>>>> Korean 한글 doesn't look good. It looks like they're
>>>>> half-width characters drawn with the space for one full-width
>>>>> character.
>>>>>
>>>>> I wonder if this is a problem with the Korean language pack.
>>>>>
>>>> Please describe the context of your observations (preferably a test case);
>>>> do you have an issue inside the Cygwin Terminal?
>>>> Thomas
>>> All mintty contexts. Viewing this email in an SSH session in screen
>>> to a remote tmux session on freeshell.org, writing this reply in vim,
>>> and changing the mintty font option from ,
>>>
>>> Font=Lucida Console
>>> to
>>> Font=ＭＳ ゴシック
>>>
>>> the above CJK characters change appearance from half-width to full-width,
>>> except for the Korean 한글, which doesn't change appearance.
>>>
>>> Attaching to the tmux session on freeshell, sshing in from my
>>> phone with Termius, the characters don't change, of course.
>>>
>>> I'm not suggesting there's anything wrong with the default mintty font
>>> option of Lucida Console. It looks good.
>>>
>>> I am on the lookout for a good font for viewing korean 한글, so I
>>> don't have to magnify the screen to read it.
>>>
>>> By the way, thanks for mintty. It is a joy to use.
>>>
>> Judging by the name (which has Katakana characters), ＭＳ ゴシック is a
>> Japanese font, so maybe it simply does not have any special Korean
>> ideographs and the Windows font fallback mechanism substitutes some
>> unsuitable font.
>> You should try to find a specific Korean font, I doubt ＭＳ ゴシック was
>> provided by the Korean language pack. I could try to reproduce the issue if
>> you tell me which font it is. As far as I know, the CJK names are only used
>> with respective language packs installed, otherwise the same font can be
>> addresses by an alternative name. You could also look up the font filename
>> (in the Windows Fonts folder) to identify it. Thomas
> In the mintty font option dropdown there are at least 2 (4?) fonts giving
> full-width Korean 한글 here. I have the Windows Korean language pack
> installed.
>
> They are with filenames in /cygdrive/c/windows/Fonts:
>
> BatangChe	batang.ttc
> DotumChe	gulim.ttc
> GulimChe	gulim.ttc
> GungsuhChe	batang.ttc
>
> And
>
> ＭＳ ゴシック	msgothic.ttc (the ＭＳ chars are full-width)
> doesn't result in full-width hangul.
>
> So, I've found a suitable font for Korean 한글.
>
Thanks for confirming. By the way, as CJK fonts are usually not very 
suitable for Latin text (mostly not being monowidth in the first place),
there is a useful mechanism in mintty that allows you to use your 
favourite CJK and non-CJK fonts together.
It's the FontChoice setting for secondary fonts:

|Font=Lucida Console ||Font2=|ＭＳ ゴシック
|FontChoice=CJK:2 |

Thomas

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