Re: [Aquamacs-bugs] Re: incorrect fontification of non-ascii chars on Mac OS X 10.4

[David Reitter]

On 29 Jun 2005, at 17:36, YAMAMOTO Mitsuharu wrote:
> > Well, create-fontset-from-mac-roman seems to create fontsets with
> > fonts only drawn from the 'roman' type.
>
> Could you give me a concrete example?

I didn't try it out (don't use cyrillic fonts etc.), but I looked at  
the name of the function and at the code, which uses

(create-fontset-from-ascii-font font resolved-font fontset-name)

The documentation says that this function 'Create[s] a fontset from  
an ASCII font font", which I take to be roman only.
But let me know if I'm mistaken there. I don't know much about the  
whole font business...

> > So I second Will in saying that it'd be good if create-fontset-from-
> > fontset-spec could be fixed.
>
> As for the "tons of wrong glyphs" problem, I think that's due to a
> misuse of the function, rather than a bug.  The function
> create-fontset-from-fontset-spec is suitable only for the case that
> all the characters in a single charset are displayed with a single
> font.  But that's not the case for fonts in Mac encodings.

Uuh, oh - the documentation of create-fontset-from-fontset-spec  
doesn't say so. Maybe it's a documentation bug then :)

So what should we use to define a fontset that contains roman and non- 
roman fonts for a variety of charsets?
That's quite relevant, because at least a few standard fontsets need  
to support everything.

If you look at carbon-font.el by T. Hiromatsu, you'll see a lot of  
(undocumented or documented-in-Japanese) code that deals with fonts,  
using create-fontset-from-fontset-spec. I assume you have a better  
idea about what's going on there...