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XFD(1) XFD(1)
NAME
xfd - display all the characters in an X font
SYNOPSIS
xfd [-options ...] -fn fontname
xfd [-options ...] -fa 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 sup-plied supplied
plied 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, show-ing showing
ing 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 respec-tive respective
tive 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 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 box-Chars boxChars
Chars 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 Font-Grid FontGrid
Grid 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 let-ter letter
ter 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 charac-ter. character.
ter. 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 argu-ments arguments
ments 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(7), xlsfonts(1), xrdb(1), xfontsel(1), fontconfig(3), 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.
X Version 11 xfd 1.0.1 XFD(1)
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