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Re: [Aquamacs-bugs] Re: incorrect fontification of non-ascii chars on Ma

From: David Reitter
Subject: Re: [Aquamacs-bugs] Re: incorrect fontification of non-ascii chars on Mac OS X 10.4
Date: Wed, 29 Jun 2005 17:59:01 +0100

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...

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