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, sev-
eral 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 bot-
tom. 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 back-
ground color to be displayed.
The origin of each glyph is normally set so that the char-
acter 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 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 dis-
played 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, inden-
tation 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 corre-
sponding 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 select-
Format 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.