xfd - display all the characters in an X font
xfd [-options...] -fn fontname
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.
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 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.
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
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 [Toc] [Back] 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.
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.
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. 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.
The program should skip over pages full of non-existent
characters.
X(1X), xlsfonts(1X), xrdb(1X), xfontsel(1X), X Logical
Font Description Conventions
Jim Fulton, MIT X Consortium; previous program of the same
name by Mark Lillibridge, MIT Project Athena.
xfd(1X)
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