GRFEXPAND(1)           COMMAND REFERENCE           GRFEXPAND(1)



NAME
     grf_expand - restore a compressed GRF file to uncompressed
     form

SYNOPSIS
     grfexpand

DESCRIPTION
     The grfexpand program restores a file compressed by the
     grfcompress command (see grf_compress(1)) to its original
     form.  Generic Raster Format (GRF) files are compressed to
     save storage space and reduce transfer time.

     This program has no command line parameters.  Input is from
     standard input and output is to standard output.  Everything
     grfexpand needs to know is in the GRF header.  All three
     levels of compression are supported:  pixel, simple, and
     pattern; grfexpand will not expand a file if its header
     shows it is not compressed.  For further information on GRF
     headers and tags, see grf(5).

     A compressed GRF file does not need to be run through the
     grfexpand program before it can be used as input to other
     tcpr programs.  The processing command  (processing(1)) as
     well as the GRF protocol drivers (tcprdrv_Tek4692.8mdqs,
     tcprdrv_Tek4693D, and tcprdrv_4696.8mdqs) automatically
     expand a compressed GRF file.

FILES
     stdin  Input is a compressed GRF screendata or copydata
            file.

     stdout Output is a normal uncompressed GRF screendata or
            copydata file.

DIAGNOSTICS
     The grfexpand command prints a warning message if the input
     GRF header shows no pattern compression; this indicates the
     file was compressed by a utility other than the grfcompress
     program.

CAVEATS
     The grfexpand command does not expand a monochrome data
     file consisting of a 1-bit pixel field width.

SEE ALSO
     grf_compress(1), processing(1), screencopy(1), st_grf(1),
     x_grf(1), tcpr(1mdqs), grf(5), tcprdrv_Tek4692(8mdqs),
     tcprdrv_Tek4693D(8mdqs), tcprdrv_Tek4696(8mdqs), and
     tcprserver(8mdqs).





Printed 4/6/89                                                  1

GRFEXPAND(1)           COMMAND REFERENCE           GRFEXPAND(1)



REFERENCES
     For more information, consult the Users Manual for your
     system.




















































Printed 4/6/89                                                  2

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