xfd
display all the characters in an X font
see also :
X - xlsfonts - xrdb - xfontsel - fc-list
Synopsis
xfd
[-options ...] -fn fontname
xfd
[-options ...] -fa fontname
add an example, a script, a trick and tips
examples
no example yet ...
... Feel free to add your own example above to help other Linux-lovers !
description
The xfd
utility creates a window containing the name of the font
being displayed, a row of command buttons, several lines of
text for displaying character metrics, and a grid containing
one glyph per cell. The characters are shown in increasing
order from left to right, top to bottom. The first character
displayed at the top left will be character number 0 unless
the -start option has been supplied in which
case the character with the number given in the
-start option will be used.
The characters
are displayed in a grid of boxes, each large enough to hold
any single character in the font. Each character glyph is
drawn using the PolyText16 request (used by the Xlib
routine XDrawString16) or the XftDrawString32
routine, depending on whether the -fn or
-fa option was given. If the -box
option is given, a rectangle will be drawn around each
character, showing where an ImageText16 request (used by the
Xlib routine XDrawImageString16) would cause
background color to be displayed.
The origin of
each glyph is normally set so that the character is drawn in
the upper left hand corner of the grid cell. However, if a
glyph has a negative left bearing or an unusually large
ascent, descent, or right bearing (as is the case with
cursor font), some character may not appear in their
own grid cells. The -center option may be used
to force all glyphs to be centered in their respective
cells.
All the
characters in the font may not fit in the window at once. To
see the next page of glyphs, press the Next button at
the top of the window. To see the previous page, press
Prev. To exit xfd, press Quit.
Individual
character metrics (index, width, bearings, ascent and
descent) can be displayed at the top of the window by
clicking on the desired character.
The font name
displayed at the top of the window is the full name of the
font, as determined by the server. See xlsfonts and
fc-list for ways to generate lists of fonts, as well
as more detailed summaries of their metrics and
properties.
options
xfd
accepts all of the standard toolkit command line options
along with the additional options listed below:
-fn font
This option specifies the core
X server side font to be displayed. This can also be set
with the FontGrid font resource. A font must be
specified.
-fa
font
This option specifies a Xft
font to be displayed. This can also be set with the FontGrid
face resource. A font pattern must be specified.
-box
This option indicates that a box should be displayed
outlining the area that would be filled with background
color by an ImageText request. This can also be set with the
FontGrid boxChars resource. The default is False.
-center
This option indicates that each glyph should be centered
in its grid. This can also be set with the FontGrid
centerChars resource. The default is False.
-start
number
This option specifies the glyph
index of the upper left hand corner of the grid. This is
used to view characters at arbitrary locations in the font.
This can also be set with the FontGrid startChar
resource. The default is 0.
-bc
color
This option specifies the color
to be used if ImageText boxes are drawn. This can also be
set with the FontGrid boxColor resource.
-rows
numrows
This option specifies the
number of rows in the grid. This can also be set with the
FontGrid cellRows resource.
-columns
numcols
This option specifies the
number of columns in the grid. This can also be set with the
FontGrid cellColumns resource.
application specific resources
The instance names of the application specific resources are
given below. Capitalize the first letter of the resource instance
name to get the corresponding class name. These resources are
unlikely to be interesting unless you are localizing xfd for a
different language.
selectFormat
Specifies a printf-style format string used to display
information about the selected character. The default is
"character 0x%02x%02x (%u,%u) (%#o,%#o)". The arguments that will
come after the format string are char.byte1, char.byte2,
char.byte1, char.byte2, char.byte1, char.byte2. char.byte1 is
byte 1 of the selected character. char.byte2 is byte 2 of the
selected character.
metricsFormat
Specifies a printf-style format string used to display character
metrics. The default is "width %d; left %d, right %d; ascent %d,
descent %d (font %d, %d)". The arguments that will come after the
format string are the character metrics width, lbearing,
rbearing, character ascent, character descent, font ascent, and
font descent.
rangeFormat
Specifies a printf-style format string used to display the range
of characters currently being displayed. The default is "range:
0x%02x%02x (%u,%u) thru 0x%02x%02x (%u,%u)". The arguments that
will come after the format string are the following fields from
the XFontStruct that is returned from opening the font:
min_byte1, min_char_or_byte2, min_byte1, min_char_or_byte2,
max_byte1, max_char_or_byte2, max_byte1, max_char_or_byte2.
startFormat
Specifies a printf-style format string used to display
information about the character at the upper left corner of the
font grid. The default is "upper left: 0x%04x (%d,%d)". The
arguments that will come after the format string are the new
character, the high byte of the new character, and the low byte
of the new character.
nocharFormat
Specifies a printf-style format string to display when the
selected character does not exist. The default is "no such
character 0x%02x%02x (%u,%u) (%#o,%#o)". The arguments that will
come after the format string are the same as for the
selectFormat resource.
fontgrid resources
The FontGrid widget is an application-specific widget, and a
subclass of the Simple widget in the Athena widget set. The
effects and instance names of this widget’s resources are given
in the OPTIONS section. Capitalize the first letter of the
resource instance name to get the corresponding class name.
widgets
In order to specify resources, it is useful to know the widgets
which compose xfd. In the notation below, indentation
indicates hierarchical structure. The widget class name is given
first, followed by the widget instance name. The application
class name is Xfd.
Xfd xfd
Paned pane
Label fontname
Box box
Command quit
Command prev
Command next
Label select
Label metrics
Label range
Label start
Form form
FontGrid grid
bugs
The program
should skip over pages full of non-existent characters.
see also
X ,
xlsfonts , xrdb , xfontsel , fc-list ,
fonts.conf, X Logical Font Description
Conventions
author
Jim Fulton, MIT
X Consortium; previous program of the same name by Mark
Lillibridge, MIT Project Athena.