xfd



XFD(1)                                                                  XFD(1)




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 display-
       ing  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 charac-
       ter 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  rou-
       tine  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 for ways to gener-
       ate 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  dis-
               played.   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  arbi-
               trary  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  wid-
       get 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 sec-
       tion.  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 informa-
               tion  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  charac-
               ter  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 argu-
               ments 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 informa-
               tion  about  the character at the upper left corner of the font
               grid.  The default is "upper left: 0x%04x (%d,%d)".  The  argu-
               ments  that will come after the format string are the new char-
               acter, 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

       X(7x), xlsfonts(1), xrdb(1), xfontsel(1), fontconfig(3), 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.




                                                                        XFD(1)

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