Difference between revisions of "User:Thisoldman"

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[[Category:Fonts (English)]]
[[Category:HOWTOs (English)]]
{{Article summary start}}
{{Article summary text|Instructions are given to improve the display of fonts in Java applications when using Sun Microsystem's Java Runtime Environment.}}
{{Article summary end}}
=Java Fonts - Sun JRE=
Some users may find the default Java fonts and the display mode of fonts in Java applications to be unpleasant. Several methods to improve the font display in the '''Sun Java Runtime Environment (JRE)'''[http://java.sun.com/javase/6/docs/technotes/guides/index.html#jre-jdk] are available. These methods may be used separately, but many users will find they achieve better results by combining them.
TrueType fonts appear to be the best supported format for use with Java.
'''Anti-aliasing'''[http://en.wikipedia.org/wiki/Anti-aliasing] of fonts is available with Sun Java 1.6 on Linux. To do this on a per user basis, add the following line to the user's {{Codeline|~/.bashrc}}.
export _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=''setting'''
Replace {{Codeline|''setting''}} with one of the following seven values: {{sn|'''TrueType''' fonts contain a '''G'''rid-fitting '''A'''nd '''S'''can-conversion '''P'''rocedure '''(GASP)'''[http://www.microsoft.com/typography/otspec/gasp.htm] table with the font creator's recommendations for font display at different point sizes.  Some sizes are recommended to be fully anti-aliased, others are to be hinted, and some sizes are recommended to be displayed as bitmaps. Combinations are sometimes used for font display at certain point sizes.}}
:*{{Codeline|off}} or {{Codeline|false}} or {{Codeline|default}} -- No anti-aliasing
:*{{Codeline|on}} -- Full anti-aliasing
:*{{Codeline|gasp}} -- Use the font's built-in hinting instructions
:*{{Codeline|lcd}} or {{Codeline|lcd_hrgb}} -- Anti-aliasing tuned for many popular LCD monitors
:*{{Codeline|lcd_hbgr}} -- Alternative LCD monitor setting
:*{{Codeline|lcd_vrgb}} -- Alternative LCD monitor setting
:*{{Codeline|lcd_vbgr}} -- Alternative LCD monitor setting
The {{Codeline|gasp}} and {{Codeline|lcd}} settings work well in many instances.
For the above change to take effect, {{Codeline|~/.bashrc}} must be ''sourced'' as the normal user.
$ source ~/.bashrc
Open a new instance of a Java application to test the changes made.
==Font Selection==
===TrueType Fonts===
Some Java applications may specify use of a particular TrueType font; these applications must be made aware of the directory path to the desired font. TrueType fonts are installed in the directory {{Codeline|/usr/share/fonts/TTF}}. Add the following line to {{Codeline|~/.bashrc}} to enable these fonts.
export JAVA_FONTS=/usr/share/fonts/TTF
''Source'' {{Codeline|~/.bashrc}} as the normal user for the change to take effect.
$ source ~/.bashrc
===Default Fonts===
The '''Lucida''' fonts distributed with the Sun JRE are the default for Java applications that do not specify a different font's use. The Lucida fonts were designed for low resolution displays and printers, many users will wish to use other fonts. The default Java font can be changed on a system-wide basis by the creation or editing of a file named {{Codeline|fontconfig.properties}}.
As root, change directory to {{Codeline|/opt/java/jre/lib}}. Copy {{Codeline|fontconfig.properties.src}} to {{Codeline|fontconfig.properties}}. Then, as root, open the new {{Codeline|fontconfig.properties}} in an editor.
# cd /opt/java/jre/lib
# cp fontconfig.properties.src fontconfig.properties
# nano fontconfig.properties      ## Editor is the user's choice.
|{{Note|Encodings other than '''Latin-1,''' or '''ISO 8859-1,'''[http://en.wikipedia.org/wiki/ISO/IEC_8859-1] are shown in other {{Codeline|fontconfig.properties.*.src}} files in {{Codeline|/opt/java/jre/lib}}. Some users will find these files to be better sources to use for editing. In all cases the edited file should be saved as {{Codeline|fontconfig.properties}}.}}
The Java font names in the configuration file are in the form of ''genericFontName.style.subset'', for example,{{Codeline|serif.plain.latin}}. These generic fonts are mapped to the installed fonts using '''X Logical Font Description (XLFD)'''[http://en.wikipedia.org/wiki/X_logical_font_description] names. The {{Codeline|%d}}, in the example below, is used as a placeholder in the XLFD name for the point size. The Java application replaces {{Codeline|%d}} at runtime.
{{Tip|The utility, '''xfontsel''', may be used to display fonts and to discover their XLFD name. Xfontsel is part of the '''xorg-utils''' package.}}
Below is an excerpt of a {{Codeline|fontconfig.properties}} file after modifications have been made. The Lucida fonts have been replaced by '''DejaVu''' fonts.
# Version -- a version number is required.
# IMPORTANT -- Do not delete the next line. Ever.
# Component Font Mappings
# gen_name.style.subset=
#      -fndry-fmly-wght-slant-sWdth-adstyle-pxlsz-ptSz-resx-resy-spc-avgWdth-rgstry-encdng
serif.plain.latin-1=-misc-dejavu serif-medium-r-normal-*-*-%d-*-*-p-*-iso8859-1
serif.bold.latin-1=-misc-dejavu serif-bold-r-normal-*-*-%d-*-*-p-*-iso8859-1
serif.italic.latin-1=-misc-dejavu serif-medium-o-normal-*-*-%d-*-*-p-*-iso8859-1
After the changes have been saved to {{Codeline|fontconfig.properties}}, the editor may be closed and the user should drop root privileges. Open a new instance of a Java application to test the changes.

Revision as of 15:30, 13 September 2009