Re: [Devel] CFF & FT_Get_First_Char Problem

[David Turner]

Ivan Nincic wrote:
> In regards to CID CFF fonts I have another question.
>
> In order to get a glyph index it seems thar the library user needs to do 
> something like this
>
> // Get ghlyph index for given cid
> CFF_Font cff = (CFF_Font)((TT_Face) m_font_face)->extra.data;
> for (UInt j = 0; j < cff->num_glyphs; ++j)  {
>  if (cff->charset.sids[j] == cid) {
>    return j;
>  }
> }
This code is likely to break in any future release of the library, since
it uses internal type declaration that are anything but stable. but I see
your point.

> Now isn't this code supposed to be encapsulated in the library itself?
> Why FT_Get_Char_Index(cid) can't do the same job?
Because a CID if not a character code, its an index into an external CMap
file that is capable of translating character codes into CIDs. We don't
support CMap files for now.

FT_Get_Char_Index is used to translate from Unicode to glyph indices, for
example. What you probably want is another function like "FT_Get_CID_Index(cid)"
that will only work with CID-based fonts.

Sorry to say, we don't have the time to code this for now, but patches are
welcomed.

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


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