Ubuntu Manpage: xfd - display all the characters in an X font

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 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) or the XftDrawString32 routine, depending on whether the -fn or -fa option was given. 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 and fc-list 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 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.

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.