[[Explain motivation (cron, possible sneer at Java, portability, ...]]






















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[[Explain alternatives:
   * utility X server
   * Xvfb [http://www.itworld.com/AppDev/1461/UIR000330xvfb/]
   * VNC [http://starbase.neosoft.com/~claird/comp.windows.misc/VNC.html]
   * tclgd
   * Image [http://pages.infinit.net/cclients/]
   * Xbit [http://www.geocities.com/SiliconValley/Hills/5586/home.html]
   * [[xwd ...]]










   * Pure Tcl solutions.  An example [DKF] offered is
  #! /usr/local/bin/tclsh8.3
  puts "Content-Type: image/x-portable-graymap"
  puts ""
  puts "P2"                          ;# ASCII PGM "magic number"
  puts "10 10"                       ;# width and height
  puts "18"                          ;# Max grey value
  for {set i 0} {$i<10} {incr i} {
     set line ""
     for {set j 0} {$j<10} {incr j} {
        lappend line [expr {$i+$j}]
     }
     puts $line
  }
  exit
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See also [strimj - string image routines]











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