bug#30793: 25.3; menubar font broken with fontconfig-2.13.0 (with Lucid toolkit)

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bug#30793: 25.3; menubar font broken with fontconfig-2.13.0 (with Lucid toolkit)

Ulrich Mueller-2
I have the following lines in my ~/.Xresources:

   Emacs.pane.menubar.font: Droid Sans-10:bold
   Emacs.pane.menubar.background: maroon
   Emacs.pane.menubar.foreground: ivory

So I would expect the menubar font to be bold (which worked as
expected with fontconfig-2.12.6).

However, with fontconfig-2.13.0, the font appears in medium weight.
Other attributes, like the typeface itself or the size seem to work
correctly.

See the downstream bug at https://bugs.gentoo.org/650370
for screenshots with fontconfig-2.12.6 and fontconfig-2.13.0.


In GNU Emacs 25.3.1 (x86_64-pc-linux-gnu, X toolkit)
 of 2018-03-12 built on juno
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
System Description: Gentoo Base System release 2.4.1

Configured using:
 'configure --prefix=/usr --build=x86_64-pc-linux-gnu
 --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
 --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
 --localstatedir=/var/lib --disable-dependency-tracking
 --disable-silent-rules --docdir=/usr/share/doc/emacs-25.3-r3
 --htmldir=/usr/share/doc/emacs-25.3-r3/html --libdir=/usr/lib64
 --program-suffix=-emacs-25 --infodir=/usr/share/info/emacs-25
 --localstatedir=/var
 --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
 --with-gameuser=:gamestat --without-compress-install
 --with-file-notification=inotify --enable-acl --with-dbus
 --without-modules --with-gpm --without-hesiod --without-kerberos
 --without-kerberos5 --with-xml2 --without-selinux --with-gnutls
 --without-wide-int --with-zlib --with-sound=alsa --with-x --without-ns
 --without-gconf --with-gsettings --without-toolkit-scroll-bars
 --with-gif --with-jpeg --with-png --with-rsvg --with-tiff --with-xpm
 --with-imagemagick --with-xft --without-cairo --with-libotf
 --with-m17n-flt --with-x-toolkit=lucid --with-xaw3d
 GENTOO_PACKAGE=app-editors/emacs-25.3-r3 'CFLAGS=-march=core2 -ggdb -O2
 -pipe' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GSETTINGS NOTIFY ACL
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB LUCID X11

Important settings:
  value of $LC_CTYPE: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 87036 3829)
 (symbols 48 19665 0)
 (miscs 40 73 147)
 (strings 32 14991 5159)
 (string-bytes 1 422238)
 (vectors 16 11759)
 (vector-slots 8 430693 5080)
 (floats 8 166 45)
 (intervals 56 299 0)
 (buffers 976 19))



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bug#30793: 25.3; menubar font broken with fontconfig-2.13.0 (with Lucid toolkit)

Eli Zaretskii
> Date: Tue, 13 Mar 2018 11:53:01 +0100
> From: Ulrich Mueller <[hidden email]>
>
> I have the following lines in my ~/.Xresources:
>
>    Emacs.pane.menubar.font: Droid Sans-10:bold
>    Emacs.pane.menubar.background: maroon
>    Emacs.pane.menubar.foreground: ivory
>
> So I would expect the menubar font to be bold (which worked as
> expected with fontconfig-2.12.6).
>
> However, with fontconfig-2.13.0, the font appears in medium weight.
> Other attributes, like the typeface itself or the size seem to work
> correctly.

Isn't this entirely between X and fontconfig?  I mean, what's Emacs's
part in this?

Was this reported to the fontconfig developers?

Thanks.



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bug#30793: 25.3; menubar font broken with fontconfig-2.13.0 (with Lucid toolkit)

Ulrich Mueller-2
>>>>> On Tue, 13 Mar 2018, Eli Zaretskii wrote:

> Isn't this entirely between X and fontconfig?  I mean, what's Emacs's
> part in this?

Indeed, it is entirely a fontconfig problem:

> $ fc-match 'Droid Sans-10:bold'   # with fontconfig-2.12.6
> DroidSans-Bold.ttf: "Droid Sans" "Bold"

> $ fc-match 'Droid Sans-10:bold'   # with fontconfig-2.13.0
> DroidSans.ttf: "Droid Sans" "Regular"

> Was this reported to the fontconfig developers?

It was: https://bugs.freedesktop.org/show_bug.cgi?id=105415

Sorry for the noise.