Re: [Devel] German umlauts with Freetype 2?

[David Turner]

Hello Patrick,

Patrick Hoffmann wrote:
> Hi folx,
>  
> I'm programming a user interface for an automat (that exchanges money
> - but that doesn't really matter). I'm using the freetype engine to
> display true type fonts with the svgalib. But when I use german
> umlauts only a square is displayed instead of the right letter. So I
> may be right if I think this means, that I'm not using the correct
> character code. But which code should I use? Is there a possibility to
> change this behaviour with FT_Set_Charmap and FT_Encoding? Does
> somebody know a solution for this problem?
>  
> I'm programming under linux.
>  
> Thanx.. hope somebody can help me out!
Are you sure you're passing the value "0xDF" to FT_Get_Char_Index
to retrieve the glyph index ?

On some systems, "char" is considered signed by default, which means
that code like the following:

  const char*  my_string = "ça va là ?";
  const char*  p;

  for ( p = my_string; *p; p++ )
  {
    gindex = FT_Get_Char_Index( face, *p );
    ...
  }

will not work correctly, because the "*p" will expand to negative
values for accented characters... FT_Get_Char_Index always convert
these to glyph index 0, which often is a little square to indicate
a missing/incorrect glyph..

Otherwise, you'll need to tell us more about the font you're
using + freetype version + compiler + platform, etc...

Hope this helps,

- David Turner
- The FreeType Project  (www.freetype.org)