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Bug#156115: marked as done (xserver-xorg-core: X server lists scalable fonts with fixed font names, and before real fixed fonts)

Your message dated Fri, 28 Jan 2011 13:34:41 +0100
with message-id <20110128123441.GA7906@debian.org>
and subject line Re: Bug#156115: xserver-xorg-core: X server lists scalable fonts with fixed font names, and before real fixed fonts
has caused the Debian Bug report #156115,
regarding xserver-xorg-core: X server lists scalable fonts with fixed font names, and before real fixed fonts
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
156115: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=156115
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: xserver-xfree86
Version: 4.1.0-16

I found a problem with Xserver, Type1 fonts, gsfonts-x11 and Tk on woody.
When the xserver has Type1 fonts in the fontpath and package gsfonts-x11
is installed the default Tk button font {Helvetica -12 bold} looks ugly:

After some debugging I have found a strange behavior of the Xserver which
seems causing the Tk problem. The bug happens only when all the following
conditions are met:

    - the X server (4.1.0) is running at 75 dpi

    - the Type1 module is loaded in the X server

    - the directory /usr/lib/X11/fonts/Type1 is at the end of X fontpath

    - package gsfonts-x11 is installed

    - Tk is searching a font {Helvetica -12 bold}, the default for buttons


The bug can be reproduced with the following commands:

### Install the required packages
# apt-get install xserver-xfree86 gsfonts-x11 tk8.3

### Start the X server at 75dpi
$ startx -- :1 -dpi 75

### Set the X fontpath. Don't use a font server
$ xset fp /usr/X11R6/lib/X11/fonts/misc/:unscaled,/usr/X11R6/lib/X11/fonts/75dpi/:unscaled,/usr/X11R6/lib/X11/fonts/100dpi/:unscaled,/usr/lib/X11/fonts/Type1
$ xset fp rehash

### List fonts, if some have 12-120-75-75-p-0 we have the problem
$ xlsfonts -fn "-*-helvet*-*-*-*-*-*-*-*-*-*-*-iso8859-1" | grep p-0-iso8859-1
...
-adobe-helvetica-bold-r-normal--12-120-75-75-p-0-iso8859-1

### Run this Tk script
$ echo "pack [button .b -font {Helvetica -12 bold} -text abcde12345]" | wish


On my woody sytem the button text looks very ugly, in particular the "2" has
a small dot under the baseline and all the font is generally very bad.


If I remove /usr/lib/X11/fonts/Type1 from the fontpath or deinstall the
package gsfont-x11, which install the font used by Tk, the text is ok:

$ xset fp- /usr/lib/X11/fonts/Type1
$ xset fp rehash
$ echo "pack [button .b -font {Helvetica -12 bold} -text abcde12345]" | wish


The following packages and fonts are installed on my system:

$ dpkg -l xserver* gsfonts-x11 tk8.3 | grep ^i
ii  xserver-common    4.1.0-16   files and utilities common to all X servers
ii  xserver-xfree86   4.1.0-16   the XFree86 X server
ii  gsfonts-x11       0.16       Make Ghostscript fonts available to X11.
ii  tk8.3             8.3.3-8    The Tk toolkit for TCL and X11 v8.3 - Run-Time Files.

$ DISPLAY= dpkg-www /usr/X11R6/lib/X11/fonts
Packages owning /usr/X11R6/lib/X11/fonts:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name                     Version    Description
+++-========================-==========-=================================================
ii  xfonts-75dpi-transcoded  4.1.0-16   75 dpi fonts for X (transcoded from ISO 10646-1)
ii  xfonts-pex               4.1.0-16   fonts for minimal PEX support in X
ii  xfonts-75dpi             4.1.0-16   75 dpi fonts for X
ii  xfonts-100dpi-transcoded 4.1.0-16   100 dpi fonts for X (transcoded from ISO 10646-1)
ii  xfonts-base              4.1.0-16   standard fonts for X
ii  gtk-engines-xenophilia   0.7-6      Customizable GTK+ engine with a plain look
ii  xvgafont                 1.2        Vga fonts for X11 in iso-8859-1 encoding.
ii  ttfonts-ms               1.0        TrueType fonts from M$
ii  gsfonts-x11              0.16       Make Ghostscript fonts available to X11.
ii  xfonts-100dpi            4.1.0-16   100 dpi fonts for X
ii  xfonts-scalable          4.1.0-16   scalable fonts for X


I have the Type1 module loaded in the server and the following fontpath:

    FontPath   "/usr/X11R6/lib/X11/fonts/misc/:unscaled"
    FontPath   "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
    FontPath   "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
    FontPath   "/usr/X11R6/lib/X11/fonts/TrueType/"
    FontPath   "/usr/X11R6/lib/X11/fonts/Type1/"

What seems strange to me is that sometimes the xserver lists fontnames
which should not exist:

$ xlsfonts | grep "helvetica-.*-iso8859-1$" | tee a | wc -l
     58

$ xlsfonts -fn "-*-helvetica-*-*-*-*-*-*-*-*-*-*-iso8859-1" | tee b | wc -l
     68

$ diff a b | grep '^>'
> -adobe-helvetica-bold-i-normal--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-bold-o-narrow--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-bold-o-normal--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-bold-r-narrow--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-bold-r-normal--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-medium-i-normal--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-medium-o-narrow--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-medium-o-normal--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-medium-r-narrow--12-120-75-75-p-0-iso8859-1
> -adobe-helvetica-medium-r-normal--12-120-75-75-p-0-iso8859-1

$ xlsfonts -l | grep "helvetica-.*-iso8859-1$" | tee c | wc -l
     58

$ xlsfonts -l -fn "-*-helvetica-*-*-*-*-*-*-*-*-*-*-iso8859-1" | grep -v NAME | tee d | wc -l
     58

Note that option -l of xlsfonts doesn't show the bogus fonts. Why?


$ xset fp- /usr/X11R6/lib/X11/fonts/Type1/; xset fp rehash

$ xlsfonts | grep "helvetica-.*-iso8859-1$" | tee e | wc -l
     48

$ xlsfonts -fn "-*-helvetica-*-*-*-*-*-*-*-*-*-*-iso8859-1" | tee f | wc -l
     48


It seems that when gsfonts-x11 is installed and Type1 fonts are added to
the fontpath the xserver returns some extra font names with pixelSize=12
and avgWidth=0. In the examples I have considered only helvetica iso8859-1
fonts, but there are many other.

Note that normally the fonts with avgWidth=0 are only scalable fonts with
pixelSize=0. Why are these bogus font names returned by the xserver?

It seems also that pixelSize=12 is related to the fact that the X server is
running at 75dpi. If you run the server at 100dpi you will get fonts with
pixelSize=17.

The problem with Tk is that when searching for an {Helvetica -12 bold} font
it finds a bogus fixed font name which matches exactly what is required but
is actually a scalable postscript font which looks very ugly on the display.

The problem doesn't happen if the server runs at 100dpi because the bogus
fontnames with pixelSize=17 are ignored by Tk which is looking for 12pixels
fonts.

-- 
Massimo Dal Zotto

--- End Message ---
--- Begin Message --- 
Hi,

Brice Goglin <Brice.Goglin@ens-lyon.org> (30/05/2007):
> Does it still matter? If so, we should probably talk to upstream
> about it instead of keeping it here for another 5 years :)

no reply in 3 years, assuming it doesn't matter so much. :)

Closing accordingly.

KiBi.

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