Re: Unix Font Manager

Subject: Re: Unix Font Manager
From: Sam TH (
Date: Sun Mar 04 2001 - 09:23:08 CST

On Sun, Mar 04, 2001 at 03:00:58PM -0000, Tomas Frydrych wrote:
> I would like to implement some changes to the Unix font manager,
> but would appreciate your comments, objections and suggestions
> before I start. This what I propose to do:
> (1) Ensure that we only load pfa, pfb and ttf fonts. At the moment
> we will load anything listed in the fonts.dir files.

Sounds very good.

> (2) Load only fonts with encoding suitable for the current locale. If
> the current locale uses iso-8859-8 encoding I propose to load only
> fonts registered with iso8859-8 encoding and any fonts with
> adobefontspecific encoding (because of the symbol fonts). At the
> moment we load all fonts listed in the fonts.dir files. Thus when I
> run under he_IL, I get two Arials, two Times, etc., listed in the
> combo box, one with iso-8859-1 from the root fonts directory, and
> one with iso-8859-8 from the he-IL subdirectory. Since the iso-8859-
> 1 are useless to me, if nothing else we are wasting resources.

I'm not as sure about this. What if you have a document with both
Hebrew and Russian? Or even just Hebrew and English? We definitely
want to be able to display all the glyphs in the document, even if
they are from totally different locales and fonts.

Do you have a solution for this? Is this impossible while preserving
what you want?

> (3) I am going to investigate why we create and keep two separeate
> xap_UnixFont instances for each font we load, and hopefully fix
> this. I would like to look at other ways of making the font loading
> more efficient; at the moment loading Unicode ttf font takes ages
> (in tens of seconds), and a large font, such as code2000, will
> completely freeze my computer (I am not sure whether it is our
> code that is responsible for this, or whether it is the X font server
> that we wait for).

Sounds very good. Remember, faster than vi. :-)
        sam th
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