Re: [Silgraphite-devel] Re: Pango and SILGraphite was Re: Possible Pango 1.4 ideas

[ftang netscape com (Yung-Fong Tang)]

Owen:

Thanks for your prompt reply.

> The place where I would hope you could insert Graphite is at the
> level of converting:
>
> Font + Character string  =>  Glyph string
>
> This is the:
>
>  void (*script_shape) (PangoFont        *font,
> 			const char       *text,
> 			int               length,
> 			PangoAnalysis    *analysis,
> 			PangoGlyphString *glyphs);
>
> ....
>  
>
> The ones I was referring to in my earlier mail are public and
> supported API; the Pango interfaces comprise about 5 pieces:
>
> 1) Public high-level API (PangoLayout)
> 2) Public low-level API  (What is used to implement PangoLayout)
> 3) Shape-engine only API (What, e.g., the arabic-xft shaper uses)
> 4) Backend-only API      (What is used to implement libpangoxft)
> 5) Internal Pango API
>
> Headers are installed for 1-4), but 3) and 4) have lower levels
> of compatibility degrees, and you need special #defines to 
> use them.
>
> (PANGO_ENABLE_ENGINE, PANGO_ENABLE_BACKEND)
>
> Regards,
>                                        Owen
>  
So.... which pieces (1-5) is (*script_shape) ?

Which header file(s) I should look into?

Does pango hard code the range of unicode it can support ? or depend on the TTF 'cmap' now? (in  mozilla, we switch font depend on the 'cmap' value [erik/bstell  also did some trick to skip over some character claims to be there but not really there])