Parsing of fontconfig font names and other font related stuff.

[Jan Djärv]

Hello.

I'm in the process of getting Emacs to use GConf defaults for font, 
antialiasing, hints and dpi.

The parser in Emacs does not accept "Monospace 8:dpi=96.0".
First float values for dpi is not accepted, even they are floats in fontconfig.
Secondly spaces before the size isn't accepted either, it is assumed to be in 
Gtk+-format when a space is there.

But fc-match do accept that type of font specification, as do all applications 
I tried that has xft.  Admittedly, the docs (the user manual) seem to indicate 
that a '-' is required before the size.

Ideally I wouldn't like to put stuff like dpi in the font string, but instead 
have the appropriate backend use the GConf value if no other value is 
specified.  Where would it be appropriate to insert that information?  In the 
xft-backend or in Ffont-spec, or perhaps somewhere else?

Thanks,

        Jan D.