On Wed, 2006-10-18 at 08:27 -0400, Leonard Rosenthol wrote:
> At 12:34 PM +0100 10/18/06, Peter B. West wrote:
> >Is it reasonable for a PDF producer to rely on the "map to glyph 0"
> >behaviour and expect that a viewer of the file will see .notdefs where
> >the font did not contain a specific glyph for the character?
> 
>       If you are planning for your PDFs to be compliant with 
> international PDF standards such as PDF/X or PDF/A - then you can NOT 
> have ANY characters in teh PDF that map to .notdef.
> 

OK.

> 
> >Perhaps we have missed some way of invoking the .notdef behaviour within
> >iText?
> >
> 
>       Why do you want this?!?!?   Why would you want to put a 
> character into the text stream of a PDF that isn't drawn?   And why 
> is Text Rendering mode #3 (no stroke or fill) not acceptable?
> 

I don't want a character that isn't drawn - that's what is happening now
by default. I want a character that is drawn as the .notdef glyph at
glyph position 0. That's the raison d'etre of glyph 0 in a TT font,
isn't it?

I don't _want_ to put undefined characters in a PDF. But if I am handed
text and a font such that there are characters in the text that are not
represented in the font, I want that fact to be obvious to the observer
of the PDF. That way I don't have to make arbitrary decisions about what
to do with the characters. I rely on the default behaviour of the font.

I am inexperienced with PDF (and with fonts in general, for that
matter), but I see this behaviour in other applications - my browser for
example.

> 
> Leonard

Peter


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