xfd(1X) xfd(1X)
NAME
xfd - display all the characters in an X font
SYNOPSIS
xfd [-options...] -fn fontname
OPTIONS
xfd accepts all of the standard toolkit command line options along with the additional options listed below: This option specifies the font
to be displayed. This can also be set with the FontGrid font resource. A font must be specified. 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. 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. 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. This option specifies the color to be used if ImageText boxes are drawn. This can also be set with the FontGrid boxColor resource.
This option specifies the number of rows in the grid. This can also be set with the FontGrid cellRows resource. This option specifies the
number of columns in the grid. This can also be set with the FontGrid cellColumns resource.
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 dis-
playing 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 DrawImageString16) 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(1X) for ways to
generate lists of fonts, as well as more detailed summaries of their metrics and properties.
WIDGETS
In order to specify resources, it is useful to know the widgets which compose xfd. In the notation below, indentation indicates hierarchi-
cal 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. Spec-
ifies 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. Specifies a printf-style for-
mat 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. 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. 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. 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.
BUGS
The program should skip over pages full of non-existent characters.
SEE ALSO
X(1X), xlsfonts(1X), xrdb(1X), xfontsel(1X), X Logical Font Description Conventions
AUTHOR
Jim Fulton, MIT X Consortium; previous program of the same name by Mark Lillibridge, MIT Project Athena.
xfd(1X)