Emacs do not show RU and IPA chars in monospaced font.

[Oleksandr Gavenko]

M-x version 23.4.1 on Debian Wheezy.

================================================================

I set:

(set-frame-font "7x13")

For EN text I get:

x:-misc-fixed-medium-r-normal--13-120-75-75-c-70-iso8859-1 (#x28)

For RU text I get:

xft:-Misc-Fixed-normal-normal-normal-*-13-*-*-*-c-80-iso10646-1 (#x394)

I try set:

(set-frame-font "-misc-fixed-medium-r-normal-*-13-*-*-*-*-*-iso10646-*")

and for russian letter get (ugly bold large letters):

xft:-Misc-Fixed-normal-normal-normal-ja-13-*-*-*-c-120-iso10646-1 (#x1FC)

After a lot of experimanting I found:

(set-frame-font "-rfx-courier-medium-r-normal-*-14-*-75-75-*-iso10646-1")

which good exept missing 13px size. 12 too small, 14 look large.

I accept the situation and use this fornt until back to edit
dictionary with IPA letters.

Some IPA letters shown as @ instead of ə:

to input: type "/e" with ipa
xft:-rfx-Courier-normal-normal-normal-*-14-*-*-*-m-90-iso10646-1 (#x323)
name: LATIN SMALL LETTER SCHWA

So I return to experimentation and found font:

(set-frame-font "FreeMono-13")
xft:-unknown-FreeMono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1 (#x59)

which seems have all chars I use for text: EN, RU, IPA. But text
become pale (black is gray) because of anti-aliasing.

I add:

<match target="pattern">
<test qual="any" name="family">
<string>FreeMono</string>
</test>
<edit name="antialias" mode="assign">
<bool>false</bool>
</edit>
</match>

to ~/.fonts.conf and restart X. Resulted look does not satisfy
me. For 13 px fornt size curve for small letter c was broken into
2 part but must be continuous. With size of 14 letters are too
large.

================================================================

I run old Emacs 22.2.1 on same host and after:

(set-frame-font "7x13")

I get text which looks RIGHT. Proof for EN, RU, IPA chars:

character: d (100, #o144, #x64, U+0064)
-Misc-Fixed-Medium-R-Normal--13-120-75-75-C-70-ISO8859-1 (#x64)
character: ʌ (332332, #o1211054, #x5122c, U+028C)
-Misc-Fixed-Medium-R-Normal--13-120-75-75-C-70-ISO10646-1 (#x28C)
character: д (332884, #o1212124, #x51454, U+0434)
-Misc-Fixed-Medium-R-Normal--13-120-75-75-C-70-ISO10646-1 (#x434)

================================================================

After all I wrote I ask help.

Why for RU letters was not used same font as for EN letters?

Is this releted for Xft support? Can I disable it (I prefer
server side fonts and don't lie anti-aliasing)?

Do I need prepare bug report?

--
Best regards!

[Oleksandr Gavenko]

On 2012-07-09, Oleksandr Gavenko wrote:
> I try set:
>
> (set-frame-font "-misc-fixed-medium-r-normal-*-13-*-*-*-*-*-iso10646-*")
>
> and for russian letter get (ugly bold large letters):
>
> xft:-Misc-Fixed-normal-normal-normal-ja-13-*-*-*-c-120-iso10646-1 (#x1FC)
>

> [SKIP]

>
> Do I need prepare bug report?

I report bug:

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11889

After a while I read:

http://emacswiki.org/emacs/SetFonts
http://www.emacswiki.org/emacs/FontSets
http://www.emacswiki.org/emacs/DisplayingNonAsciiCharacters

and corresponding Emacs manuals.

That I leaned that I need some tools for viewing selected chars in selected
font.

For server-side fonts this can be done like:

$ xfontsel -sampleUCS 'əθʃçʧ θʒtð Hello Привет!'

For client-side font I found:

$ gucharmap

After looking for several problematic chars I found that they are missing in
13 px size for my font or look wrongly.

After playing with configurations I found font that cover all needed my me
characters.

And learned how use fontsets, here my setup:

(set-frame-font "-misc-fixed-medium-r-normal--14-*-*-*-c-*-iso10646-1")
(set-fontset-font "fontset-default" 'latin
"-misc-fixed-medium-r-normal--14-*-*-*-c-*-iso10646-1")
(set-fontset-font "fontset-default" 'phonetic
"-misc-fixed-medium-r-normal--14-*-*-*-c-*-iso10646-1")
(set-fontset-font "fontset-default" 'cyrillic
"-misc-fixed-medium-r-normal--14-*-*-*-c-*-iso10646-1")
(set-fontset-font "fontset-default" 'greek
"-misc-fixed-medium-r-normal--14-*-*-*-c-*-iso10646-1")

Another quiz for me was searching of script name symbols for
'set-fontset-font'. Jumping to .c source take 'char-script-table'.

After reading manual about built-in types I get this list:

(pp (char-table-extra-slot char-script-table 0))
latin phonetic greek coptic cyrillic armenian ...

Another useful thing that help me is:

(describe-fontset "default-fontset")
(describe-fontset "standard-fontset")
(describe-fontset "startup-fontset")

So algorithm to fix font displaying simple:

* Use Emacs >= 23.x for UTF support.
* Find fonts that cover your chars (xfontsel & gucharmap).
* Set fonts as say manual. I Emacs make wrong decision for selected chars,
set font manually by 'set-fontset-font'. This func support individual char,
char range and symbolic names (which I use in this post).

================================================================

Anyone can tell me test program for client-side fonts that display string that
I pass to it? gucharmap show only individual chars (opposed to xfontsel with
'-sampleUCS'). This is inconvenient, I like to pass this string to perform
on whole text:

(defun my-print-range (start end)
(let (i)
(setq i start)
(while (< i end)
(ucs-insert i)
(setq i (1+ i))
)))

;; ASCII
(my-print-range ?\u0020 ?\u0080)
;; !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~

;; Cyrillic
(my-print-range ?\u0410 ?\u0460)
;; АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяѐёђѓєѕіїјљњћќѝўџ

;; Greek
(my-print-range ?\u0391 ?\u03ca)
;; ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡ΢ΣΤΥΦΧΨΩΪΫάέήίΰαβγδεζηθικλμνξοπρςστυφχψω

(my-print-range ?\u0250 ?\u02d1)
;; IPA
;; ɐɑɒɓɔɕɖɗɘəɚɛɜɝɞɟɠɡɢɣɤɥɦɧɨɩɪɫɬɭɮɯɰɱɲɳɴɵɶɷɸɹɺɻɼɽɾɿʀʁʂʃʄʅʆʇʈʉʊʋʌʍʎʏʐʑʒʓʔʕʖʗʘʙʚʛʜʝʞʟʠʡʢʣʤʥʦʧʨʩʪʫʬʭʮʯʰʱʲʳʴʵʶʷʸʹʺʻʼʽʾʿˀˁ˂˃˄˅ˆˇˈˉˊˋˌˍˎˏː

--
Best regards!

[Drew Adams]

Oleksandr, it looks like you came up with a good deal of useful info. Thanks
for sharing it. Consider posting it on an Emacs Wiki page - e.g., all in one
place.

[Peter Dyballa]

Am 10.07.2012 um 23:00 schrieb Oleksandr Gavenko:

> Anyone can tell me test program for client-side fonts that display string that
> I pass to it?

Open an UTF-8 encoded file with these characters in GNU Emacs! Or write a function that prints them in some buffer, maybe scratch*... or *Messages*. All you need is an UTF-8 encoded buffer.

--
Greetings

Pete

When Richard Stallman goes to the loo, he core dumps.