Re: [Freetype] CJK Fonts

[Werner LEMBERG]

> Moin.

Moinmoin!

> I've read on freetype.org that Freetype has no CJK-Support. But the
> only reason I've downloaded Freetype is to generate JPEGs with
> japanese characters from MSMincho.ttc.  So, in a maybe hopeless
> attempt to get a solution I ask here if anyone can tell me how I can
> access the japanese characters in the .ttc.

Maybe you've misunderstood that a bit.  FreeType has no CJK support
because it is a library, not a program.  It is generic and can accept
any 16bit input encoding, converts it to a glyph index according to
the selected cmap in the font, and rasterizes the glyph.  Whether this
is a CJK font or any other font is completely irrelevant.

A simple solution for your problem is to take ftstring.c (from the
`ft2demos' archive) and to modify the function prepare_text() so that
it can accept 16bit entities:

  static void  prepare_text( const unsigned char*  string )
  {
    const unsigned char*  p     = (const unsigned char*)string;
    PGlyph                glyph = glyphs;
    FT_UInt               glyph_index; 


    num_glyphs = 0;  
    while ( *p )
    {
      if ( !*(++p) )
        break;
      glyph_index = FT_Get_Char_Index(
                      face,
                      (((FT_ULong)*(p - 1)) >> 8) + (FT_ULong)*p);
      glyph->glyph_index = glyph_index;
      glyph++;
      num_glyphs++;
      if ( num_glyphs >= MAX_GLYPHS )
        break;
      p++;
    }
  }

Now ftstring accepts Unicode input.  To convert from, say, SJIS to
Unicode, use e.g. the `uniconv' converter which comes with the `yudit'
editor.

Take a screenshot and convert the image to JPEG.


    Werner