[oi-dev] Emacs has a bad font

Andreas Wacknitz A.Wacknitz at gmx.de
Tue Jun 11 20:01:58 UTC 2024 

Am 11.06.24 um 21:34 schrieb Andreas Wacknitz via oi-dev:
Rereading the thread I realized that you are using the nox variant of
emacs and this is bound to the font being used by the terminal window.
I have checked mine here and I don't seem to have the problems you
experienced.

Have you tried to run emacs for a newly created user? Often settings
accumulated over years cause problems.

Andreas
> I am an emacs user and have configured it to use my preferred font.
>
> This
>
> (use-package font
>   :no-require
>   :hook (after-init . setup-fonts)
>   :preface
>   (defun font-installed-p (font-name)
>     "Check if a font with FONT-NAME is available."
>     (find-font (font-spec :name font-name)))
>   (defun setup-fonts ()
>     (cond ((font-installed-p "JetBrainsMono")
>            (set-face-attribute 'default nil :font "JetBrainsMono"))
>           ((font-installed-p "Source Code Pro")
>            (set-face-attribute 'default nil :font "Source Code Pro"))
>           ((font-installed-p "DejaVu Sans")
>            (set-face-attribute 'default nil :font "DejaVu Sans")))
>   (provide 'font)))
>
> is what I am using in my init.el file to choose my preferred font.
>
> When I evaluate-and-print
> (face-attribute 'default :font)
> #<font-object "-JB-JetBrains
> Mono-regular-normal-normal-*-27-*-*-*-m-0-iso10646-1">
>
> I am sure that I am using JetBrains Mono as intended.
>
>
> Andreas
>
> Am 11.06.24 um 03:09 schrieb Gordon Ross:
>> Looking into this again.  I definitely have this font selected:
>>
>> $ fc-match "Deja Vu Sans Mono"
>> DejaVuSansMono.ttf: "DejaVu Sans Mono" "Book"
>> $ fc-match "Deja Vu Sans Mono-12"
>> DejaVuSansMono.ttf: "DejaVu Sans Mono" "Book"
>>
>> It exists, and is a TrueType font.
>> If I use that font in a mate-terminal profile
>> (un-check "use system font" and specify that)
>> it renders with font smoothing as expected.
>>
>> Selecting that same font in emacs give the jagged edges.
>> Any ideas what else could be disabling font smoothing?
>>
>> On Tue, Nov 21, 2023 at 7:58 PM Alan Coopersmith
>> <alan.coopersmith at oracle.com> wrote:
>>> Yes, the "bad" one is not antialiased, possibly a bitmap font,
>>> while the "good" one is definitely antialiased, possibly TrueType or
>>> OpenType.
>>>
>>>          -alan-
>>>
>>> On 11/21/23 07:25, Gordon Ross wrote:
>>>> Thanks.  I've confirmed that emacs is using the system font in both
>>>> builds.
>>>> Here are two screen shots (bad, good) that one can zoom in.
>>>> The bad one has visible stair step diagonals etc. so I guess
>>>> the good one has "anti-aliasing" and the bad does not?
>>>> Does that clue help in tracking this down?
>>>>
>>>> On Mon, Nov 20, 2023 at 2:20 PM Alan Coopersmith
>>>> <alan.coopersmith at oracle.com> wrote:
>>>>> GTK & Pango use fonts from fontconfig, not from X11, so it's not
>>>>> expected
>>>>> to match xfontsel (which uses X11 fonts).  Among other things,
>>>>> Pango 1.44
>>>>> dropped support for Type 1 & bitmap fonts, which X11/xfontsel
>>>>> still support,
>>>>> leaving TrueType & OpenType font support.  One easy to spot
>>>>> difference,
>>>>> fontconfig uses more natural names, like "DejaVu Sans Mono", while
>>>>> X11 uses
>>>>> the older naming format with the 14 dashes separating fields. 
>>>>> Visually,
>>>>> if the font is anti-aliased or LCD optimized, it must be
>>>>> fontconfig, as
>>>>> the X11 font system doesn't support either technology.
>>>>>
>>>>> https://www.x.org/releases/current/doc/xorg-docs/fonts/fonts.html
>>>>> describes the difference (using "Xft" for the fontconfig system),
>>>>> but it's about a decade behind the latest changes now.
>>>>>
>>>>>           -alan-
>>>>>
>>>>> On 11/20/23 11:10, Gordon Ross wrote:
>>>>>> As far as I can tell, the "system" font for mate terminal and
>>>>>> such is:
>>>>>> "DejaVu Sans Mono", or
>>>>>> -misc-dejavu sans mono-medium-o-normal--0-0-0-0-p-0-ascii-0
>>>>>>
>>>>>> Based on what I see with xfontsel, it looks like emacs may be using:
>>>>>> -misc-dejavu sans light-extralight-r-normal--0-0-0-0-p-0-ascii-0
>>>>>>
>>>>>> I tried playing with the options/Set Default Font in emacs.
>>>>>> I'm not sure why, but emacs shows a lot less than xlsfonts does.
>>>>>>
>>>>>> Here's what I have (from "save options") in both builds.
>>>>>> (custom-set-faces
>>>>>>     ;; custom-set-faces was added by Custom.
>>>>>>     ;; If you edit it by hand, you could mess it up, so be careful.
>>>>>>     ;; Your init file should contain only one such instance.
>>>>>>     ;; If there is more than one, they won't work right.
>>>>>>     '(default ((t (:family "DejaVu Sans Mono" :foundry "PfEd" :slant
>>>>>> normal :weight normal :width normal :height 113)))))
>>>>>>
>>>>>> There seems to be a change in either the fonts or the rendering,
>>>>>> from
>>>>>> the older OI build to recent ones.
>>>>>> The examples shown by "xfontsel" look too light in some cases too.
>>>>>> I'd appreciate tips on how to track down this problem.
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> On Wed, Nov 8, 2023 at 4:27 PM Gary Mills
>>>>>> <gary_mills at fastmail.fm> wrote:
>>>>>>> On Wed, Nov 08, 2023 at 05:44:42PM +0100, Andreas Wacknitz wrote:
>>>>>>>
>>>>>>>> If you are using the gtk variant of emacs
>>>>>>> That's the one I'm using.
>>>>>>>
>>>>>>>> then it relies on pango for
>>>>>>>> font rendering and layout which in case has dropped support for
>>>>>>>> older
>>>>>>>> font types a couple of months ago.
>>>>>>>> So your problem might be that you are trying to use an
>>>>>>>> unsupported (by
>>>>>>>> pango) font type and thus rendering results look ugly.
>>>>>>>> You might solve this be choosing a font of a supported font
>>>>>>>> type, eg. a
>>>>>>>> truetype font.
>>>>>>> There's no indication of truetype in the list of fonts that emacs
>>>>>>> displays.  In fact, emacs will often tell me that a font does not
>>>>>>> exist when I select that font from its list.
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> -Gary Mills-            -refurb- -Winnipeg, Manitoba, Canada-
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> oi-dev mailing list
>>>>>>> oi-dev at openindiana.org
>>>>>>> https://openindiana.org/mailman/listinfo/oi-dev
>>>>>> _______________________________________________
>>>>>> oi-dev mailing list
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>>>>>> https://openindiana.org/mailman/listinfo/oi-dev
>>>>>
>>> --
>>>           -Alan Coopersmith- alan.coopersmith at oracle.com
>>>            Oracle Solaris Engineering -
>>> https://blogs.oracle.com/solaris
>>>
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