gend

PURPOSE

     Provides a general graphics device backend.

SYNOPSIS
     gend [ [ -r [ num ] -u ] ] [ [ -n [ num ] ] [ -T [ name ] ] ] [ file ]

DESCRIPTION

     The /usr/bin/graf/gend command displays  gps files on the
     graphics output devices supported by the Advanced Display
     Graphics  Support Library  (GSL).   For more  information
     about  GSL, see  the "Advanced  Display Graphics  Support
     Library" in AIX Operating System Technical Reference.  By
     default,  gend reads  standard  input and  writes to  the
     current display (see "display"),  but gend can also drive
     printers  and  plotters if  you  have  installed the  VDI
     drivers that  are in the Extended  Services Program.  You
     can specify  the name  of one  or more  gps files  on the
     command line.   If you  enter a file  name of  - (minus),
     gend reads standard input.

     When gend displays an image,  it opens a new virtual ter-
     minal.  You can move to and from this virtual terminal by
     pressing Next Window (Alt-Action).   See "open" and Using
     the AIX  Operating System for for  information on virtual
     terminals.  To  end gend and close  the virtual terminal,
     press END OF FILE (Ctrl-D).

     Note:  The  gend command  produces the standard  gps line
     style attributes with one  exception.  Line style 4 (long
     dashed) is rendered as dash-dot-dot.

FLAGS

     -nnum   Specifies the number of chords per circle.  Legal
             values  are 64,  128, 256,  or 512.   The default
             value is 128.

             Rather  than  drawing   truly  circular  arcs  or
             circles, gend converts them into a series of very
             short  line segments  (chords), whose  end points
             lie on the circle.   For most devices and images,
             the default  value of  128 is  satisfactory.  The
             higher values  give a  smoother image;  the lower
             value provides faster drawing time.
     -rnum   Displays data in gps region num.  A gps object is
             defined  in a  Cartesian plane  of 64K  points on
             each axis.   The plane,  or universe,  is divided
             into 25 square regions numbered  1 to 25 from the
             lower left to the upper right.
     -u      Displays data in the entire gps universe.

     -Tname  Uses the device specified by the name environment
             variable.   The default  is  the current  display
             (this must  be supported by /dev/hft).   When the
             image is  to be  displayed on other  devices, you
             must ensure that the proper VDI device handler is
             installed.

FILES

     /usr/bin/graf/gend    The general devices backend.
     /tmp/dev.XXXXXX       Temporary file.

RELATED INFORMATION

     The following commands:  "ged,"  "gdev," "graphics," and
     "open."

     "Advanced Display Graphics Support  Library" in AIX Oper-
     ating System Technical Reference

     Installing programs in Installing and Customizing the AIX
     Operating System.