RE: [Swftools-common] missing characters in generated swf

[Goldstein, Seth]

> -----Original Message-----
> From: address@hidden
> [mailto:swftools-common-
> address@hidden On Behalf Of
> Goldstein, Seth
> Sent: Tuesday, March 17, 2009 9:09 AM
> To: address@hidden
> Subject: RE: [Swftools-common] missing characters in generated swf
> 
> >
> > Very interesting.  Learning more about PDFs than I probably ever
> wanted
> > to. :)
> >
> > FYI - the PDF does render "correctly" with Ghostscript, so I'm
> sifting
> > through their source code right now to see how they handle that
> glyph.
> > But, there is a lot of code here, so if someone wants to lend
another
> > pair of eyes, I'd love the assistance!
> >
> >
> 
> So in the Ghostscript source code, we have this function here:
> 
> <code>
> bool
> gs_font_glyph_is_notdef(gs_font_base *bfont, gs_glyph glyph)
> {
>     gs_const_string gnstr;
> 
>     if (glyph == gs_no_glyph)
>       return false;
>     if (glyph >= gs_min_cid_glyph)
>       return (glyph == gs_min_cid_glyph);
>     return (bfont->procs.glyph_name((gs_font *)bfont, glyph, &gnstr)
>=
> 0 &&
>           gnstr.size == 7 && !memcmp(gnstr.data, ".notdef", 7));
> }
> </code>
> 
> Along with these #defines:
> 
> <code>
> #define GS_NO_GLYPH ((gs_glyph)0x7fffffff)
> #if arch_sizeof_long > 4
> #  define GS_MIN_CID_GLYPH ((gs_glyph)0x80000000L)
> #else
> /* Avoid compiler warnings about signed/unsigned constants. */
> #  define GS_MIN_CID_GLYPH ((gs_glyph)~0x7fffffff)
> #endif
> #define GS_MIN_GLYPH_INDEX (GS_MIN_CID_GLYPH | (GS_MIN_CID_GLYPH >>
1))
> #define GS_GLYPH_TAG (gs_glyph)(GS_MIN_CID_GLYPH | GS_MIN_GLYPH_INDEX)
> #define GS_MAX_GLYPH max_ulong
> /* Backward compatibility */
> #define gs_no_glyph GS_NO_GLYPH
> #define gs_min_cid_glyph GS_MIN_CID_GLYPH
> #define gs_max_glyph GS_MAX_GLYPH
> </code>
> 
> Perhaps this is the appropriate test for notdef?
> 
> 

Still not sure about this one, but just wanted to let you know that I
forwarded the PDF onto the XPDF folks and I did receive a response from
them:

"That's a known problem related to using glyph ID 0 in TrueType fonts.
It will be fixed in the next release of Xpdf.

- Derek"