File: groff.info,  Node: Intermediate Output Examples,  Next: Output Language Compatibility,  Prev: Command Reference,  Up: gtroff Output

6.1.3 Intermediate Output Examples
----------------------------------

This section presents the intermediate output generated from the same
input for three different devices.  The input is the sentence 'hell
world' fed into 'gtroff' on the command line.

High-resolution device 'ps'

     This is the standard output of 'gtroff' if no '-T' option is given.

          shell> echo "hell world" | groff -Z -T ps

          x T ps
          x res 72000 1 1
          x init
          p1
          x font 5 TR
          f5
          s10000
          V12000
          H72000
          thell
          wh2500
          tw
          H96620
          torld
          n12000 0
          x trailer
          V792000
          x stop

     This output can be fed into 'grops' to get its representation as a
     PostScript file.

Low-resolution device 'latin1'

     This is similar to the high-resolution device except that the
     positioning is done at a minor scale.  Some comments (lines
     starting with '#') were added for clarification; they were not
     generated by the formatter.

          shell> echo "hell world" | groff -Z -T latin1

          # prologue
          x T latin1
          x res 240 24 40
          x init
          # begin a new page
          p1
          # font setup
          x font 1 R
          f1
          s10
          # initial positioning on the page
          V40
          H0
          # write text 'hell'
          thell
          # inform about space, and issue a horizontal jump
          wh24
          # write text 'world'
          tworld
          # announce line break, but do nothing because...
          n40 0
          # ...the end of the document has been reached
          x trailer
          V2640
          x stop

     This output can be fed into 'grotty' to get a formatted text
     document.

AT&T 'troff' output
     Since a computer monitor has a much lower resolution than modern
     printers, the intermediate output for X11 devices can use the
     jump-and-write command with its 2-digit displacements.

          shell> echo "hell world" | groff -Z -T X100

          x T X100
          x res 100 1 1
          x init
          p1
          x font 5 TR
          f5
          s10
          V16
          H100
          # write text with jump-and-write commands
          ch07e07l03lw06w11o07r05l03dh7
          n16 0
          x trailer
          V1100
          x stop

     This output can be fed into 'xditview' or 'gxditview' for
     displaying in X.

     Due to the obsolete jump-and-write command, the text clusters in
     the AT&T 'troff' output are almost unreadable.