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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, 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 char-
     acter 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 rou-
     tine XDrawImageString16) would cause background color to  be
     displayed.

     The origin of each glyph is normally set so that the charac-
     ter is drawn in the upper left hand corner of the grid cell.
     However, if a glyph has a negative left bearing or an unusu-
     ally 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
     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 displayed
             outlining  the  area that would be filled with back-
             ground 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 cen-
             tered  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, indenta-
     tion 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 des-
             cent, 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  fol-
             lowing  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.

SEE ALSO
     X11(7), 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.

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