Re: [Freetype] Freetype

[David Turner]

Hello Manfred,

Manfred Kubica a écrit :
> 
> Hi,
> 
> i have some problem with your very nice library freetype 2.0.1:
> 
> My font has 237 glyphs. If I will load the glyph via FT_Get_Char_Index
> I becomes only 197 glyphs.
> 
That's perfectly normal. A font's charmap doesn't necessarily map all
character codes to all the glyphs in the font. Some "extra" glyphs might
be placed in the font for several reasons:

  - they're accessible through a different charmap

  - they're application-specific symbols (i.e. you need to know
    their glyph index to access them)

  - they're only used for advanced typographic operations (e.g.
    ligature substitutions) and are generally only referenced
    through advanced internal font tables (e.g. OpenType Layout
    tables)

>   for (const UInt8* ptrC = g_request.chars; *ptrC; ptrC++)
>   {
>                 int idx = FT_Get_Char_Index(face, *ptrC);
>                 if (idx != 0)
>       iCnt++;
>   }
> 
The result of 'iCnt' in this code is very dependent on the content
of your "g_request.chars" array, not the content of the font..

Are you sure this is the code you're using ??

> And now the problem. If I load the glyphs via FT_Load_Glyph(face, *ptr,
> FT_LOAD_DEFAULT);
> all is correct. I also see with your tool "ftview" all glyphs.
> 
>
> Is there a problem with FT_Get_Char_Index? I have seen the same problem with
> the library GUT which use your library too.
>
I don't think it's a problem with FT_Get_Char_Index or with FreeType,
but it'd be interesting to know what font you're using, and what
"characters" you're missing. Could you give us:

  - the font name
  - the font file's name
  - the format, the origin, etc..

Hope we'll be able to help you then,

Regards,

- David