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Re: HarfBuzz is available on MS-Windows
From: |
Eli Zaretskii |
Subject: |
Re: HarfBuzz is available on MS-Windows |
Date: |
Fri, 07 Jun 2019 23:00:13 +0300 |
> From: Andy Moreton <address@hidden>
> Date: Fri, 07 Jun 2019 18:05:23 +0100
>
> I've tested this with an MSYS2 64bit build on Windows 10.
Thanks, you can now just build the master branch.
> It appears to work ok, but is noticeably slower compared to the
> master branch.
I didn't see any tangible slowdown with HarfBuzz on my system. Can
you post some benchmarks with timings? (I assume both branches were
built using the same optimization switches.)
> a) On harfbuzz and master branches from "emacs -Q", a machine without
> the Symbola font does not display the emoji U+1F44B WAVING HAND SIGN (no
> font available). Babelmap shows that this character is available using
> the built-in "Segoe UI Symbol" or "Segoe UI Emoji" fonts (or by
> installing Symbola).
>
> b) On the harfbuzz branch from "emacs -Q", the lao U+EC3 LAO VOWEL SIGN
> AY and U+EC3 LAO VOWEL SIGN O characters are not displayed (no font
> available). Babelmap shows that this character is available using the
> built-in "Leelawadee UI" font.
BabelMap just shows coverage, but Emacs also tests additional features
of the fonts (although I don't think we have any special requirements
for Emoji; Lao certainly does require some OTF features).
In any case, the font backend has nothing whatsoever to do with how
Emacs searches for a suitable font, at least on Windows. What the
above means is that Leelawadee somehow doesn't fit the criteria for
the Lao script and/or the features bits these fonts exhibit don't
announce that they cover the respective codepoint ranges. The way to
improve the font search is to customize the fontsets.
> I use the following to speed up finding built-in fonts on Windows 10:
>
> (pcase-dolist
> (`(,font-spec . ,targets)
> '(;; Unicode blocks ---------------------------------------
> ("Segoe UI Emoji"
> (#x1f900 . #x1f9ff)) ; Supplemental Symbols and Pictographs
> ;; Unicode scripts --------------------------------------
> ("Segoe UI Symbol" braille mathematical symbol)
> ("Leelawadee UI" khmer thai lao)
> ("Nirmala UI" bengali devanagari gujarati kannada
> malayalam oriya sinhala tamil telugu)
> ("Microsoft Himalaya" tibetan)
> ("Myanmar Text" burmese)
> ("Ebrima" ethiopic)
> ("Gadugi" canadian-aboriginal cherokee)))
> (dolist (target targets)
> (set-fontset-font "fontset-default" target font-spec nil 'prepend)))
>
> Perhaps the built in fonts should be added to the default mappings for
> Windows 10.
I think the policy is not to mention non-free fonts in our fontsets.
- Re: HarfBuzz is available on MS-Windows, (continued)
- Re: HarfBuzz is available on MS-Windows, Phillip Lord, 2019/06/02
- Re: HarfBuzz is available on MS-Windows, Óscar Fuentes, 2019/06/02
- Re: HarfBuzz is available on MS-Windows, Eli Zaretskii, 2019/06/02
- Re: HarfBuzz is available on MS-Windows, Óscar Fuentes, 2019/06/02
- Re: HarfBuzz is available on MS-Windows, Eli Zaretskii, 2019/06/02
- Re: HarfBuzz is available on MS-Windows, Óscar Fuentes, 2019/06/03
- Re: HarfBuzz is available on MS-Windows, Eli Zaretskii, 2019/06/03
Re: HarfBuzz is available on MS-Windows, Tak Kunihiro, 2019/06/04
Re: HarfBuzz is available on MS-Windows, Andy Moreton, 2019/06/07
- Re: HarfBuzz is available on MS-Windows,
Eli Zaretskii <=