Bug#578825: Do not support font substitution mechanism provided by fontconfig

[Juhapekka Tolvanen <juhtolv@iki.fi>]

Package: xterm
Version: 256-1
Severity: normal


I am japanophile (shinnichi), who is trying to learn Japanese
language. Therefore I have configured font substitution and virtual
fonts (Sans, Serif and Monospace) of my fontconfig this way:

1. When trying to find glyph for certain character, try Bitstream Vera
and its clones and derivatives first, especially DejaVu fonts.

2. If that fails, try Japanese fonts next (IPA-fonts, VL-fonts etc.)

3. And so on.

In fact, I have released those configs in WWW:

http://iki.fi/juhtolv/configs/fontconfig/

I also have released my X-resources in WWW:

http://iki.fi/juhtolv/configs/X/dot.Xresources.bz2

I also have this line in my shell configs:

export PANGO_LANGUAGE="fi;en;ja"

Unfortunately xterm do not support font substitution at all. I gave this
command:

xterm -fa 'Monospace' -fs 12

Then in that xterm window I gave this command:

lynx 'http://ja.wikipedia.org/wiki/%E3%82%A4%E3%83%A9%E3%82%AF'

All Japanese characters look like like boxes.

It is easy to see, how it fails: When some virtual font is called, it
only finds the first real font accepted for that virtual font and
that's all.


-- System Information:
Debian Release: squeeze/sid
  APT prefers stable
  APT policy: (990, 'stable'), (500, 'testing-proposed-updates'), (500, 'proposed-updates'), (101, 'testing'), (99, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-trunk-686 (SMP w/1 CPU core)
Locale: LANG=fi_FI.utf8, LC_CTYPE=fi_FI.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages xterm depends on:
ii  libc6                     2.10.2-6       Embedded GNU C Library: Shared lib
ii  libfontconfig1            2.8.0-2        generic font configuration library
ii  libice6                   2:1.0.6-1      X11 Inter-Client Exchange library
ii  libncurses5               5.7+20100313-2 shared libraries for terminal hand
ii  libutempter0              1.1.5-2        A privileged helper for utmp/wtmp 
ii  libx11-6                  2:1.3.3-3      X11 client-side library
ii  libxaw7                   2:1.0.7-1      X11 Athena Widget library
ii  libxft2                   2.1.14-2       FreeType-based font drawing librar
ii  libxmu6                   2:1.0.5-1      X11 miscellaneous utility library
ii  libxt6                    1:1.0.7-1      X11 toolkit intrinsics library
ii  xbitmaps                  1.1.0-1        Base X bitmaps

Versions of packages xterm recommends:
ii  x11-utils                     7.5+3      X11 utilities
ii  xutils                        1:7.5+5    X Window System utility programs m

Versions of packages xterm suggests:
pn  xfonts-cyrillic               <none>     (no description available)

-- no debconf information

-- 
Juhapekka "naula" Tolvanen * http colon slash slash iki dot fi slash juhtolv
"Quidquid Latine dictum sit altum videtur."