XFD(1) X Version 11 (Release 6.6) XFD(1)
NAME
xfd - display all the characters in an X font
SYNOPSIS
xfd [-options ...] -fn fontname
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). 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
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 font to be displayed.
This can also be set with the FontGrid font
resource. A font 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.
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
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.
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.
SEE ALSO
X(1), xlsfonts(1), xrdb(1), xfontsel(1), X Logical Font
Description Conventions
BUGS
The program should skip over pages full of non-existent
characters.
AUTHOR
Jim Fulton, MIT X Consortium; previous program of the same
name by Mark Lillibridge, MIT Project Athena.
Page 4 (printed 7/20/06)