AVS Modules						write compressed image
Lawrence Berkeley Laboratory					   24 Jan 1992

NAME
     write compressed image - write compressed image file to disk from a field

SUMMARY
     Name	   write	compressed image

     Type	   data

     Inputs	   field 2D 4-vector byte

     Outputs	   none

     Parameters	   _N_a_m_e		   _T_y_p_e		  _D_e_f_a_u_l_t	 _M_i_n	   _M_a_x
		   Output File	   Browser	  not applicable

DESCRIPTION
     The "write compressed image" module provides the same functionality
     as the AVS-supplied "write image" module, with the added twist that
     the written image will be in a "compressed" format.  That is, 
     a file is written using the AVS .x file format, then compressed
     with the compress utility present on your UNIX(tm) system.

     An AVS image may be decompressed using the UNIX(tm) uncompress utility,
     or by using the sibling module "read compressed image."

     Upon entrance to the computation function, this module first writes
     a "normal" (ie uncompressed) AVS .x file.  After that is finished,
     that file is compressed using the system-supplied "compress"
     utility.

PARAMETERS

     Output Image
	  The name of the compressed image file.  A ".Z" suffix will
	  be added to whatever name the user gives, courtesy of the
	  system compress utility.

OUTPUTS
	none

RELATED	MODULES
     read compressed image, write image, write image

SEE ALSO
     UNIX(tm) compress, uncompress

AVS Modules						write compressed image
Lawrence Berkeley Laboratory					   24 Jan 1992

24 Jan 1992

The source code, image_io.c, contains two very useful modules.
They will read and write compressed AVS image files, where the
UNIX-supplied un/compress are used for un/compressing the
.x files.

These modules have been tested on Sun and Stardent, uh, KPC Titan machines.
They HAVE NOT BEEN TESTED on anything alse.

wes