hi
I am making some progress using the syntax in
SIGs/Fonts/Packaging/Fontconfig
<http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig#local-specific-default-font-overrides>,
however,
there are still problems. I hope either of you can help me find out
what's wrong.
the new fontconfig file is attached. I used <alias><prefer> environments,
and renamed the file from 85 to 61 (it does not work at 85), inserted
between
60-latin and 64-nonlatin-fedora.
Now, for en locale, almost perfect, except that the last two
blocks did not seem to work (i.e. replacing WenQuanYi Bitmap Song by
Uming when pixelsize>16 and <11). You can browse
http://wqy.sourceforge.net/cgi-bin/eindex.cgi?WQYTest
to test.
For zh locales, in addition to the above problem, under monospace
(gnome-terminal),
the Latin glyphs were rendered by the wqy bitmap glyphs. I expect
those are rendered by Dejavu Sans Mono or Bitstream Sans Mono.
in either case, the output of
FC_DEBUG=4 fc-match "monospace:lang=zh-cn:pixelsize=10px"
always put wqy as the first one, this is not consistent with what
Firefox actually displayed under en locales.
Can any of you help me to find out how to get around these problems?
thank you
Qianqian
Qianqian Fang wrote:
hi Nicolas
the syntax described in Fonts/Packaging/Fontconfig
<http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig> seems
not sufficient
to accomplish the desired substitution rules.
First, we want to set wqy-bitmap-fonts as the default font for
displaying Chinese characters (for example U4E00-U9FA5, and
U3400-U4D86 and some punctuations), for all aliases (sans/serif/mono),
and all locales (maybe except ja/ko), only at 10px to 16px. This can
not be done with <alias><prefer></prefer></alias> syntax (I just
tested, it used the Latin part in wqy-bitmap-fonts in mono, and can
not use Uming/ukai for above/below 10-16px, both of these are bad).
Second, I want the system preferred Latin fonts to display the non-CJK
part. The provided syntax, in my own opinion, can not do this either.
You mention "no business touching non CJK locales," I don't fully
agree. The default fontconfig setup for rendering Chinese webpages
under non-zh locales is terrible. You can test this using en or other
non CJK locales, by browsing http://wenq.org , you will see a mixed
text rendered by Japanese fonts, uming, ukai and some Japanese/Korean
bitmap X core fonts. In my opinion, that is non-usable. To tell the
truth, en_US is my default locale for both office and at home. I don't
want my desktop looks non-legible by my colleagues. However, I do want
it to process Chinese properly. Most my Chinese friends working in the
US have the same set up for the same reason. The default en (or non
CJK) Chinese rendering does need to be improved (it might be more
appropriate to handle this with Fedora font committee or some sort,
but improving the situation by installing an additional font package
may not a bad solution either: those who don't like it just uninstall
this font, and everything will back to the default way).
Last, the link that you mentioned does look promising:
http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig#local-specific-default-font-overrides
<http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig#local-specific-default-font-overrides>
However, my question is, how can I make sure that the preferred Latin
fonts (not necessarily Vera/Dejavu, could be something that user chose
as in Andreas's case in bug #381311) overrides the Latin part of wqy?
Thank you and I would be glad to hear further instructions.
Qianqian
On Nov 24, 2007 9:21 AM, Nicolas Mailhot <nicolas.mailhot@xxxxxxxxx
<mailto:nicolas.mailhot@xxxxxxxxx>> wrote:
Le vendredi 23 novembre 2007 à 23:25 -0500, Qianqian Fang a écrit :
Hi Qianqian,
> 4. Questions
>
> That's all I want to learn from you: do you see a robust
implementation
> of fontconfig font selection mechanism to achieve my goals above?
> if yes, how? if no, to whom should I file bug reports to?
I'm not sure if I've assimilated all your goals, but here are some
comments on your fontconfig file:
> <?xml version=" 1.0"?>
> <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
You probably want ../fonts.dtd there but that's general XML fontconfig
brokenness most everyone is guilty of.
> <match target="pattern">
I suppose this is protected by the selectfont pattern before but I'd
avoid playing any complex substitution games when the name of an
existing on-system font is given, and only substitute either fonts
not
available at all or synthetic fonts like sans-serif and friends.
Also, please use a simple match with a test for family inside
instead of
this pattern indirection, as documented on:
http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig
> <test equal="any" compare="eq" name="lang">
> <string>en</string>
> <string>en-us</string>
You have no business touching non CJK locales, please remove this. If
for some reason an app does not tag text with the correct locale,
complain to its authors.
http://fedoraproject.org/wiki/SIGs/Fonts/Dev/LanguageAwarenessProblem
These two lines are probably responsible for most of your problem
reports.
> <string>zh-cn</string>
> <string>zh-tw</string>
> <string>zh-hk</string>
> <string>zh-sg</string>
> </test>
> <test compare="more_eq" name="pixelsize">
> <double>11</double>
> </test>
> <test compare="less_eq" name="pixelsize">
> <double>16</double>
> </test>
Are you sure of the 11-16 pixel range?
> <edit name="family" mode="prepend_first">
> <string>WenQuanYi Bitmap Song</string>
> </edit>
> </match>
> <match target="pattern">
[…]
> <test compare="more_eq" name="size">
> <double>8</double>
> </test>
> <test compare="less_eq" name="size">
> <double>12</double>
> </test>
Point sizes have no meaning for bitmap fonts, unless you assume a
fixed
point/pixel ratio, which is not hardware reality. Dump this match
block
it's actively evil.
> <edit name="family" mode="prepend_first">
> <string>WenQuanYi Bitmap Song</string>
> </edit>
> </match>
> <match target="pattern">
> <test equal="any" compare="eq" name="family">
> <string>WenQuanYi Bitmap Song</string>
> </test>
> <test equal="any" compare="eq" name="family">
> <string>monospace</string>
> </test>
> <edit name="family" mode="prepend">
> <string>Bitstream Vera Sans Mono</string>
> </edit>
> <edit name="family" mode="prepend" binding="strong">
> <string>DejaVu LGC Sans Mono</string>
> </edit>
> </match>
If you didn't touch non-CJK locales before you wouldn't need this
bandaid. Also you're assuming some other fonts are present on system
which may not be the case. Our default latin font list is dynamic and
changes from release to release, and depending on what font packages
users actually install.
If you really want Vera or DejaVu to override WenQuanYi Bitmap Song
contents, the override should be added to the fontconfig file those
fonts ship.
Wouldn't a simple
http://fedoraproject.org/wiki/SIGs/Fonts/Packaging/Fontconfig#local-specific-default-font-overrides
rule with additional pixel range restriction be sufficient for your
needs?
Regards,
--
Nicolas Mailhot
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<!--
Serif faces
-->
<alias>
<family>serif</family>
<prefer><family>WenQuanYi Bitmap Song</family></prefer>
</alias>
<!--
Sans-serif faces
-->
<alias>
<family>sans-serif</family>
<prefer><family>WenQuanYi Bitmap Song</family></prefer>
</alias>
<!--
Monospace faces
-->
<alias>
<family>monospace</family>
<prefer>
<family>WenQuanYi Bitmap Song</family>
<family>DejaVu LGC Sans Mono</family>
</prefer>
</alias>
<!--
Use vector fonts at larger/smaller sizes
-->
<match target="font">
<test equal="any" compare="eq" name="family">
<string>WenQuanYi Bitmap Song</string>
</test>
<test compare="more" name="pixelsize">
<double>16</double>
</test>
<edit name="family" mode="prepend" binding="same">
<string>AR PL ShanHeiSun Uni</string>
</edit>
</match>
<match target="font">
<test equal="any" compare="eq" name="family">
<string>WenQuanYi Bitmap Song</string>
</test>
<test compare="less" name="pixelsize">
<double>11</double>
</test>
<edit name="family" mode="prepend" binding="same">
<string>AR PL ShanHeiSun Uni</string>
</edit>
</match>
</fontconfig>
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