>
> I suggest to use font-at to get the font-object you need for
> font-get-glyphs.

I had already used that and got
#<font-object "-GOOG-Noto Sans
Kaithi-regular-normal-normal-*-23-*-*-*-*-0-iso10646-1">
but font-get-glyphs was not accepting it.


> So the character is actually visible, it is just displayed as a thin
> space.  Which means that either its glyph in the font is like that, or
> that the font lacks a glyph for it.  What does "C-u C-x =" say when
> the cursor is on that thin 1-pixel space?
>

position: 89 of 89 (99%), column: 0
            character: 𑂽 (displayed as 𑂽) (codepoint 69821, #o210275,
#x110bd)
              charset: unicode (Unicode (ISO10646))
code point in charset: 0x110BD
               script: kaithi
               syntax: w which means: word
             category: L:Strong L2R
             to input: type "C-x 8 RET 110bd" or "C-x 8 RET KAITHI NUMBER
SIGN"
          buffer code: #xF0 #x91 #x82 #xBD
            file code: #xF0 #x91 #x82 #xBD (encoded by coding system utf-8)
              display: by this font (glyph code):
    ftcrhb:-GOOG-Noto Sans
Kaithi-regular-normal-normal-*-23-*-*-*-*-0-iso10646-1 (#x48)

Character code properties: customize what to show
  name: KAITHI NUMBER SIGN
  general-category: Cf (Other, Format)
  decomposition: (69821) ('𑂽')

There is an overlay here:
 From 89 to 90
  face                 hl-line
  priority             -50
  window               #<window 3 on *scratch*>


There are text properties here:
  fontified            t
  rear-nonsticky       t

In the character section the character is not displayed in emacs but
displayed in firefox, but it is displayed in the decomposition section in
emacs. I have attached the images
Opening the font file in font forge also shows their glyphs

On Fri, Apr 29, 2022 at 9:43 PM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: समीर सिंह Sameer Singh <lumarzeli30@gmail.com>
> > Date: Fri, 29 Apr 2022 20:56:56 +0530
> > Cc: emacs-devel@gnu.org
> >
> >   Do they have any glyphs in the font?  Did you try to use
> >  font-get-glyphs to see if the font can display those characters when
> >  they are alone?
> >
> >
> > I am an extreme novice, so please bear with me, but I cannot get the
> function to work. I tried to enter the
> > following as the argument FONT OBJECT but none worked:
> > #<font-object "-GOOG-Noto Sans
> Kaithi-regular-normal-normal-*-23-*-*-*-*-0-iso10646-1">
> > "-GOOG-Noto Sans Kaithi-regular-normal-normal-*-23-*-*-*-*-0-iso10646-1"
> > "#<font-object -GOOG-Noto Sans
> Kaithi-regular-normal-normal-*-23-*-*-*-*-0-iso10646-1>"
> > "Noto Sans Kaithi"
> > "/usr/share/fonts/noto/NotoSansKaithi-Regular.ttf"
>
> I suggest to use font-at to get the font-object you need for
> font-get-glyphs.
>
> >  That's what your composition rules already do: they are only triggered
> >  when the character preceding the numerals is a number sign.  So I
> >  don't think I understand the problem.
> >
> > I want the font of devanagari and kaithi to be different, but since
> kaithi uses devanagari numerals and a
> > devanagari font other than Noto Sans Kaithi does not render the number
> signs, I was asking that is it
> > possible to only change the devanagari font to Noto Sans Kaithi if it is
> around a number sign.
>
> No, that's not possible, sorry.
>
> >  When you put the cursor at the number sign character, don't you see a
> >  thin 1-pixel space there?
> >
> > Yes, when the character is not visible in Emacs and whenI put the cursor
> in its place there is a thin 1-pixel
> > space there.
>
> So the character is actually visible, it is just displayed as a thin
> space.  Which means that either its glyph in the font is like that, or
> that the font lacks a glyph for it.  What does "C-u C-x =" say when
> the cursor is on that thin 1-pixel space?
>