[HarfBuzz] How to get a glyph code for a character?
richard.wordingham at ntlworld.com
Sat May 25 14:50:38 UTC 2019
On Sat, 25 May 2019 17:26:02 +0300
Eli Zaretskii <eliz at gnu.org> wrote:
> One of the methods an Emacs font-backend should provide is the
> encode_char method, which returns the glyph code of the selected font
> for a character given by its Unicode codepoint. For example, the XFT
> backend uses the XftCharIndex function for that purpose, and the
> Freetype backend uses FT_Get_Char_Index.
> What is the best way of providing such a method with HarfBuzz on
> MS-Windows? One possibility is obviously to call hb_shape, but maybe
> there's a simpler way for a single codepoint?
I presume you're after the glyph indicated by the raw cmap, e.g.
without localisation. Using hb_shape could very well result in the
addition of a dotted circle for a combining mark - is that what you
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