Re: [Devel] CFF driver and TektonPro

[Tom Kacvinsky]

Tekton-Pro is an OpenType font, so yes, it has a head.  The CFF driver
only sets pure_cff to 1 if the font is not an OpenType/CFF font and
it is not a CEF font.

I will look into this further this weekend (I have some issues with the
CFF driver and CID keyed CFF fonts to look into, so I may as well look
at this).

Tom

On Wed, 12 Dec 2001, Detlef Würkner wrote:

> Hello!
>
> While experimenting with the TektonPro font contained in Adobe InDesign
> (1.5.2 IMHO?) trial version, I discovered something in the CFF driver:
>
> file src/cff/cffobjs.c starting from line 305
> ----8<----
>       /* now, the font can be either an OpenType/CFF font, or an SVG CEF */
>       /* font in the later case; it doesn't have a `head' table          */
>       error = face->goto_table( face, TTAG_head, stream, 0 );
>       if ( !error )
>       {
>         pure_cff = 0;
>
>         /* load font directory */
>         error = sfnt->load_face( stream, face,
>                                  face_index, num_params, params );
>         if ( error )
>           goto Exit;
>       }
>       else
>       {
>         /* load the `cmap' table by hand */
>         error = sfnt->load_charmaps( face, stream );
>         if ( error )
>           goto Exit;
>
>         /* XXX: we don't load the GPOS table, as OpenType Layout     */
>         /* support will be added later to a layout library on top of */
>         /* FreeType 2                                                */
>       }
> ----8<----
>
> The comment says an SVG CEF font has no `head' table, but the source sets
> pure_cff to 0 only when a `head' table is found? TektonPro-Regular.otf
> has a `head' table, is it a CFF or a CEF font? This source detects it as
> CEF which makes it useless since face->num_glyphs stays at 0 which would
> not happen if pure_cff would stay at 1.
>
> Ciao, Detlef
>

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