bug#71568: 30.0.50; Noto Color Emoji does not work in Emacs for Android

bug#71568: 30.0.50; Noto Color Emoji does not work in Emacs for Android

[Ant via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Good evening, I've been trying to view emojis on Emacs for Android and
noticed that colored emojis do not appear, while monochrome emojis do
appear instead. I've only experimented with Noto Emoji Colore and Noto
Emojis so far.


Steps to reproduce:

1. Install both Noto Emoji (monochrome emojis) and Noto Emoji Color
(colored emojis) and copy the two .TTF files to ~/fonts

2. Restart Emacs with -Q

3. Execute the following

(set-fontset-font t 'emoji '("Noto Color Emoji" . "iso10646-1") nil
'prepend)

4. Try to insert emojis and notice that blank "spaces" are inserted,
instead

5. Repeat step 3 but with "Noto Emoji" font and see how the blank spaces
are filled with the respective monochrome emojis


I'm using the latest SourceForge release of Emacs for Android.

If this is not a big but a known limitation known I believe
it's appropriate to specify it under Android section of the Emacs manual

Thank you in advance!




In GNU Emacs 30.0.50 (build 1, aarch64-unknown-linux-android29) of
 2024-06-14 built on xeon
Repository revision: a458dc5dc828cfbe5d74226d6ef45a3d205cb7d8
Windowing system distributor 'Sony', version 31.0.0
System Description: Sony/XQ-AS52_EEA/XQ-AS52:12/58.2.A.10.126/058002A010012603718185433:user/release-keys

Configured using:
 'configure --with-png=yes --with-webp=yes --with-gif=yes
 --with-jpeg=yes --with-xml2=yes --with-sqlite3=yes --with-gnutls=yes
 --with-tiff=yes --with-selinux=yes --with-modules=yes
 --with-tree-sitter=yes --with-imagemagick=no --with-lcms2=yes
 --with-mailutils= --with-pop=no-by-default --with-harfbuzz=yes
 --with-threads=yes --with-rsvg=yes --enable-check-lisp-object-type=
 'CFLAGS=-O2 -Werror=implicit-function-declaration''

Configured features:
GIF GLIB GMP GNUTLS HARFBUZZ JPEG LIBSELINUX LIBXML2 MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SQLITE3 THREADS TIFF TREE_SITTER WEBP
ZLIB

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

Major mode: Info

Minor modes in effect:
  diff-hl-margin-mode: t
  diff-hl-flydiff-mode: t
  server-mode: t
  global-org-modern-mode: t
  text-scale-mode: t
  beacon-mode: t
  marginalia-mode: t
  vertico-mouse-mode: t
  vertico-multiform-mode: t
  vertico-mode: t
  global-form-feed-mode: t
  repeat-mode: t
  save-place-mode: t
  savehist-mode: t
  global-so-long-mode: t
  global-auto-revert-mode: t
  recentf-mode: t
  override-global-mode: t
  smart-mark-mode: t
  delete-selection-mode: t
  on-screen-global-mode: t
  pixel-scroll-precision-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  modifier-bar-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  isearch-fold-quotes-mode: t
  context-menu-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  window-divider-mode: t
  minibuffer-regexp-mode: t
  buffer-read-only: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  temp-buffer-resize-mode: t

Load-path shadows:
/data/data/org.gnu.emacs/files/.emacs.d/elpa/transient-20231216.1908/transient hides /assets/lisp/transient
/data/data/org.gnu.emacs/files/.emacs.d/elpa/landmark-1.0/landmark hides /assets/lisp/obsolete/landmark

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mm-util mail-prsvr mail-utils magit-base magit-section crm dash
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cursor-sensor view ligature display-line-numbers diff-hl-show-hunk
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diff-hl-flydiff diff diff-hl log-view pcvs-util vc-dir ewoc vc
vc-dispatcher diff-mode track-changes hl-line hl-todo hideshow server
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executable ob-comint org-pcomplete pcomplete comint ansi-osc ansi-color
org-list org-footnote org-faces org-entities time-date org-version
ob-emacs-lisp ob-core ob-eval org-cycle org-table ol rx org-fold
org-fold-core org-keys oc org-loaddefs thingatpt advice find-func
cal-menu calendar cal-loaddefs org-compat org-macs format-spec
conf-major-modes hydra lv init-eye-candy outline-minor-faces noutline
outline nano-theme face-remap nano-theme-support disp-table
all-the-icons all-the-icons-faces data-material data-weathericons
data-octicons data-fileicons data-faicons data-alltheicons beacon setup
init-window-buffers init-modeline init-minibuffer marginalia
vertico-mouse vertico-multiform vertico init-completion orderless
init-help init-essential form-feed which-key repeat saveplace savehist
so-long autorevert filenotify recentf tree-widget edmacro kmacro
cl-extra help-mode bind-key misc-utils easy-mmode smart-mark delsel
on-screen pixel-scroll cua-base ring no-littering compat
init-package-list finder-inf os-android cus-edit pp cus-load wid-edit
ace-window-autoloads adaptive-wrap-autoloads advice-patch-autoloads
aggressive-indent-autoloads all-the-icons-completion-autoloads
all-the-icons-dired-autoloads all-the-icons-ibuffer-autoloads
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embark-consult-autoloads consult-autoloads embark-autoloads
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info-colors-autoloads inheritenv-autoloads kaolin-themes-autoloads
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string-inflection-autoloads svg-tag-mode-autoloads svg-lib-autoloads
switchy-window-autoloads tablist-autoloads toc-org-autoloads
tomelr-autoloads transcribe-autoloads transient-autoloads
transpose-frame-autoloads treepy-autoloads treesit-auto-autoloads
ts-autoloads s-autoloads vertico-autoloads vundo-autoloads
web-mode-autoloads websocket-autoloads which-key-autoloads
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paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode
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isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine 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
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads inotify android multi-tty
move-toolbar make-network-process emacs)

Memory information:
((conses 16 615290 4671154) (symbols 48 31176 1208) (strings 32 164644 110202)
 (string-bytes 1 4229005) (vectors 16 50540) (vector-slots 8 586902 334414)
 (floats 8 594 2272) (intervals 56 43891 20944) (buffers 992 14))

bug#71568: 30.0.50; Noto Color Emoji does not work in Emacs for Android

[Jeremy Bryant via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Ant via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> writes:

> Good evening, I've been trying to view emojis on Emacs for Android and
> noticed that colored emojis do not appear, while monochrome emojis do
> appear instead. I've only experimented with Noto Emoji Colore and Noto
> Emojis so far.

Adding Po Lu on this bug report

>
>
> Steps to reproduce:
>
> 1. Install both Noto Emoji (monochrome emojis) and Noto Emoji Color
> (colored emojis) and copy the two .TTF files to ~/fonts
>
> 2. Restart Emacs with -Q
>
> 3. Execute the following
>
> (set-fontset-font t 'emoji '("Noto Color Emoji" . "iso10646-1") nil
> 'prepend)
>
> 4. Try to insert emojis and notice that blank "spaces" are inserted,
> instead
>
> 5. Repeat step 3 but with "Noto Emoji" font and see how the blank spaces
> are filled with the respective monochrome emojis
>
>
> I'm using the latest SourceForge release of Emacs for Android.
>
> If this is not a big but a known limitation known I believe
> it's appropriate to specify it under Android section of the Emacs manual
>
> Thank you in advance!
>
>
>
>
> In GNU Emacs 30.0.50 (build 1, aarch64-unknown-linux-android29) of
>  2024-06-14 built on xeon
> Repository revision: a458dc5dc828cfbe5d74226d6ef45a3d205cb7d8
> Windowing system distributor 'Sony', version 31.0.0
> System Description: Sony/XQ-AS52_EEA/XQ-AS52:12/58.2.A.10.126/058002A010012603718185433:user/release-keys
>
> Configured using:
>  'configure --with-png=yes --with-webp=yes --with-gif=yes
>  --with-jpeg=yes --with-xml2=yes --with-sqlite3=yes --with-gnutls=yes
>  --with-tiff=yes --with-selinux=yes --with-modules=yes
>  --with-tree-sitter=yes --with-imagemagick=no --with-lcms2=yes
>  --with-mailutils= --with-pop=no-by-default --with-harfbuzz=yes
>  --with-threads=yes --with-rsvg=yes --enable-check-lisp-object-type=
>  'CFLAGS=-O2 -Werror=implicit-function-declaration''
>
> Configured features:
> GIF GLIB GMP GNUTLS HARFBUZZ JPEG LIBSELINUX LIBXML2 MODULES NOTIFY
> INOTIFY PDUMPER PNG RSVG SECCOMP SQLITE3 THREADS TIFF TREE_SITTER WEBP
> ZLIB
>
> Important settings:
>   value of $LANG: en_US.utf8
>   locale-coding-system: utf-8-unix
>
> Major mode: Info
>
> Minor modes in effect:
>   diff-hl-margin-mode: t
>   diff-hl-flydiff-mode: t
>   server-mode: t
>   global-org-modern-mode: t
>   text-scale-mode: t
>   beacon-mode: t
>   marginalia-mode: t
>   vertico-mouse-mode: t
>   vertico-multiform-mode: t
>   vertico-mode: t
>   global-form-feed-mode: t
>   repeat-mode: t
>   save-place-mode: t
>   savehist-mode: t
>   global-so-long-mode: t
>   global-auto-revert-mode: t
>   recentf-mode: t
>   override-global-mode: t
>   smart-mark-mode: t
>   delete-selection-mode: t
>   on-screen-global-mode: t
>   pixel-scroll-precision-mode: t
>   tooltip-mode: t
>   global-eldoc-mode: t
>   show-paren-mode: t
>   electric-indent-mode: t
>   mouse-wheel-mode: t
>   modifier-bar-mode: t
>   tool-bar-mode: t
>   menu-bar-mode: t
>   file-name-shadow-mode: t
>   isearch-fold-quotes-mode: t
>   context-menu-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   blink-cursor-mode: t
>   window-divider-mode: t
>   minibuffer-regexp-mode: t
>   buffer-read-only: t
>   line-number-mode: t
>   visual-line-mode: t
>   transient-mark-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   temp-buffer-resize-mode: t
>
> Load-path shadows:
> /data/data/org.gnu.emacs/files/.emacs.d/elpa/transient-20231216.1908/transient hides /assets/lisp/transient
> /data/data/org.gnu.emacs/files/.emacs.d/elpa/landmark-1.0/landmark hides /assets/lisp/obsolete/landmark
>
> Features:
> (shadow sort mixed-pitch mail-extr emacsbug message yank-media puny
> rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util
> text-property-search mm-decode mm-bodies mm-encode mail-parse rfc2231
> mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
> mm-util mail-prsvr mail-utils magit-base magit-section crm dash
> info-colors help-fns radix-tree mule-util vertico-directory
> cursor-sensor view ligature display-line-numbers diff-hl-show-hunk
> diff-hl-inline-popup diff-hl-margin diff-hl-dired dired dired-loaddefs
> diff-hl-flydiff diff diff-hl log-view pcvs-util vc-dir ewoc vc
> vc-dispatcher diff-mode track-changes hl-line hl-todo hideshow server
> init org-lazy-babel conf-org doct org-inlinetask warnings org-num
> org-modern org-agenda org-element org-persist xdg org-id org-element-ast
> inline avl-tree generator org-capture org-refile org ob ob-tangle ob-ref
> ob-lob ob-table ob-exp org-macro org-src sh-script smie treesit
> executable ob-comint org-pcomplete pcomplete comint ansi-osc ansi-color
> org-list org-footnote org-faces org-entities time-date org-version
> ob-emacs-lisp ob-core ob-eval org-cycle org-table ol rx org-fold
> org-fold-core org-keys oc org-loaddefs thingatpt advice find-func
> cal-menu calendar cal-loaddefs org-compat org-macs format-spec
> conf-major-modes hydra lv init-eye-candy outline-minor-faces noutline
> outline nano-theme face-remap nano-theme-support disp-table
> all-the-icons all-the-icons-faces data-material data-weathericons
> data-octicons data-fileicons data-faicons data-alltheicons beacon setup
> init-window-buffers init-modeline init-minibuffer marginalia
> vertico-mouse vertico-multiform vertico init-completion orderless
> init-help init-essential form-feed which-key repeat saveplace savehist
> so-long autorevert filenotify recentf tree-widget edmacro kmacro
> cl-extra help-mode bind-key misc-utils easy-mmode smart-mark delsel
> on-screen pixel-scroll cua-base ring no-littering compat
> init-package-list finder-inf os-android cus-edit pp cus-load wid-edit
> ace-window-autoloads adaptive-wrap-autoloads advice-patch-autoloads
> aggressive-indent-autoloads all-the-icons-completion-autoloads
> all-the-icons-dired-autoloads all-the-icons-ibuffer-autoloads
> all-the-icons-autoloads backline-autoloads beacon-autoloads
> calfw-autoloads cape-autoloads cdlatex-autoloads centaur-tabs-autoloads
> cider-autoloads clojure-mode-autoloads consult-dir-autoloads
> consult-eglot-autoloads consult-flyspell-autoloads
> consult-ls-git-autoloads consult-notes-autoloads
> consult-org-roam-autoloads consult-project-extra-autoloads
> consult-yasnippet-autoloads crdt-autoloads crux-autoloads
> current-window-only-autoloads denote-menu-autoloads denote-autoloads
> diff-hl-autoloads dimmer-autoloads dired-du-autoloads
> dired-git-info-autoloads dired-toggle-sudo-autoloads doc-toc-autoloads
> doct-autoloads eldev-autoloads eldoc-box-autoloads elisp-demos-autoloads
> embark-consult-autoloads consult-autoloads embark-autoloads
> envrc-autoloads expand-region-autoloads eyebrowse-autoloads
> flycheck-eldev-autoloads flycheck-autoloads forge-autoloads
> closql-autoloads form-feed-autoloads ghub-autoloads helpful-autoloads
> elisp-refs-autoloads highlight-indent-guides-autoloads
> ibuffer-project-autoloads ibuffer-sidebar-autoloads ibuffer-vc-autoloads
> info-colors-autoloads inheritenv-autoloads kaolin-themes-autoloads
> autothemer-autoloads landmark-autoloads ligature-autoloads
> literate-calc-mode-autoloads magit-annex-autoloads magit-todos-autoloads
> magit-autoloads git-commit-autoloads hl-todo-autoloads
> marginalia-autoloads markdown-mode-autoloads math-symbols-autoloads
> minions-autoloads mixed-pitch-autoloads mpv-autoloads
> nano-dialog-autoloads nano-theme-autoloads nlinum-autoloads
> no-littering-autoloads nov-autoloads ob-ipython-autoloads
> dash-functional-autoloads ob-mermaid-autoloads olivetti-autoloads
> on-screen-autoloads orderless-autoloads org-appear-autoloads
> org-board-autoloads org-caldav-autoloads org-calibre-notes-autoloads
> org-cliplink-autoloads org-download-autoloads async-autoloads
> org-drill-autoloads org-fragtog-autoloads org-mime-autoloads
> org-modern-autoloads org-mpv-notes-autoloads org-msg-autoloads
> org-notebook-autoloads org-noter-pdftools-autoloads
> org-notifications-autoloads org-notify-autoloads org-pdftools-autoloads
> org-noter-autoloads org-pomodoro-autoloads alert-autoloads
> log4e-autoloads gntp-autoloads org-present-autoloads org-ql-autoloads
> org-recur-autoloads org-ref-autoloads citeproc-autoloads
> bibtex-completion-autoloads biblio-autoloads biblio-core-autoloads
> avy-autoloads htmlize-autoloads f-autoloads org-remark-autoloads
> org-roam-ui-autoloads org-roam-autoloads magit-section-autoloads
> emacsql-autoloads org-special-block-extras-autoloads lolcat-autoloads
> dad-joke-autoloads lf-autoloads org-super-agenda-autoloads
> org-transclusion-autoloads other-frame-window-autoloads
> outline-minor-faces-autoloads ov-autoloads ox-hugo-autoloads
> ox-pandoc-autoloads ht-autoloads ox-reveal-autoloads
> pandoc-mode-autoloads hydra-autoloads lv-autoloads parsebib-autoloads
> parseedn-autoloads parseclj-autoloads pcre2el-autoloads
> pdf-tools-autoloads persist-autoloads pkg-info-autoloads epl-autoloads
> powerline-autoloads queue-autoloads sesman-autoloads setup-autoloads
> simple-httpd-autoloads sketch-mode-autoloads smart-mark-autoloads
> sound-wav-autoloads deferred-autoloads spinner-autoloads
> string-inflection-autoloads svg-tag-mode-autoloads svg-lib-autoloads
> switchy-window-autoloads tablist-autoloads toc-org-autoloads
> tomelr-autoloads transcribe-autoloads transient-autoloads
> transpose-frame-autoloads treepy-autoloads treesit-auto-autoloads
> ts-autoloads s-autoloads vertico-autoloads vundo-autoloads
> web-mode-autoloads websocket-autoloads which-key-autoloads
> windresize-autoloads with-editor-autoloads xr-autoloads
> xref-union-autoloads yaml-autoloads yasnippet-classic-snippets-autoloads
> yasnippet-snippets-autoloads yasnippet-autoloads zone-nyan-autoloads
> esxml-autoloads kv-autoloads zone-rainbow-autoloads
> zone-select-autoloads info dash-autoloads zone-sl-autoloads
> zones-autoloads zop-to-char-autoloads package browse-url url url-proxy
> url-privacy url-expand url-methods url-history url-cookie
> generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse
> auth-source cl-seq eieio eieio-core cl-macs icons password-cache json
> subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib
> early-init doom-lib pcase rmc iso-transl tooltip cus-start cconv eldoc
> paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode
> mwheel android-win term/common-win touch-screen ls-lisp tool-bar dnd
> fontset image regexp-opt fringe tabulated-list replace newcomment
> text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
> isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
> font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
> indonesian philippine 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
> composite emoji-zwj charscript charprop case-table epa-hook
> jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
> theme-loaddefs faces cus-face macroexp files window text-properties
> overlay sha1 md5 base64 format env code-pages mule custom widget keymap
> hashtable-print-readable backquote threads inotify android multi-tty
> move-toolbar make-network-process emacs)
>
> Memory information:
> ((conses 16 615290 4671154) (symbols 48 31176 1208) (strings 32 164644 110202)
>  (string-bytes 1 4229005) (vectors 16 50540) (vector-slots 8 586902 334414)
>  (floats 8 594 2272) (intervals 56 43891 20944) (buffers 992 14))

bug#71568: 30.0.50; Noto Color Emoji does not work in Emacs for Android

[Eli Zaretskii]

> Cc: n58r@pm.me, luangruo@yahoo.com
> Date: Sun, 07 Jul 2024 21:43:47 +0100
> From:  Jeremy Bryant via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Ant via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> writes:
> 
> > Good evening, I've been trying to view emojis on Emacs for Android and
> > noticed that colored emojis do not appear, while monochrome emojis do
> > appear instead. I've only experimented with Noto Emoji Colore and Noto
> > Emojis so far.
> 
> Adding Po Lu on this bug report

This bug was already closed because this is a known limitation.