Re: [h-e-w] Font Rendering Issues

[Tim Schumacher]

On Mon, 31 Dec 2018 17:40:33 +0100,
Eli Zaretskii wrote:
> 
> > Date: Mon, 31 Dec 2018 15:40:03 +0100
> > From: Tim Schumacher <address@hidden>
> > 
> > I have problem with some characters. One Example is for Example 0x27FC. I 
> > have
> > installed a font from
> > https://www.fileformat.info/info/unicode/char/27fc/fontsupport.htm that 
> > should
> > render the font. But I still get the box with the number.
> 
> Install the latest version of the Symbola font, and the problem will
> go away.

Yup, that solved it, but now I have the next problem that this Character does
not displays: 𝕊

> > To reproduce this issues:
> > 
> > C-x 8 d RET 27FC RET
> > 
> > Which produces this: ⟼
 
> Most likely, you have some other font on your system which claims
> support for the corresponding block of Unicode codepoints, but in
> reality doesn't have a glyph for that character.  If that font is
> examined by Emacs before the one you installed, you will see the box
> with a hex code.
> 
> The advantage of installing Symbola is twofold: (1) Emacs knows about
> Symbola and will automatically use it if available; (2) it is a free
> font, unlike some of those mentioned by that URL.  (And Symbola
> supports a lot of other characters, so installing it is a net win.)

What is a bit strange, that on linux, emacs uses „DevaVu Sans“ to display these
characters:

character: ? (displayed as ?) (codepoint 10236, #o23774, #x27fc)
    preferred charset: unicode (Unicode (ISO10646))
code point in charset: 0x27FC
               script: symbol
               syntax: w   which means: word
             category: .:Base
             to input: type "C-x 8 RET 27fc" or "C-x 8 RET LONG RIGHTWARDS 
ARROW FROM BAR"
          buffer code: #xE2 #x9F #xBC
            file code: #xE2 #x9F #xBC (encoded by coding system utf-8-unix)
              display: by this font (glyph code)
    xft:-PfEd-DejaVu Sans-normal-normal-normal-*-24-*-*-*-*-0-iso10646-1 
(#x1058)

I would rather use DejaVu than Symbola, because the symbols look nicer. Is there
a way to get uniscribe to use another font than symbola to render these glyphs?

Thanks and a happy and successfull new year!

Tim