tiffsv(1)

TIFFSV(1)                USER COMMANDS                  TIFFSV(1)

NAME

     tiffsv - save an image from the framebuffer in a  TIFF  file
     (Silicon Graphics version)

SYNOPSIS

     tiffsv [ options ] output.tif [ x1 x2 y1 y2 ]

DESCRIPTION

     tiffsv saves all or part of the framebuffer in a file  using
     the  Tag  Image  File Format, Revision 6.0.  By default, the
     image is saved with data  samples  packed  (PlanarConfigura-
     tion=1),  compressed  with  the Lempel-Ziv & Welch algorithm
     (Compression=5), and with each strip no more  than  8  kilo-
     bytes.   These  characteristics  can be overriden, or expli-
     citly specified with the options described below.

OPTIONS

     -b   Save the image as a greyscale image as if it were  pro-
          cessed by tiff2bw(1).  This option is included for com-
          patibility with the standard scrsave(6D) program.

     -c   Specify the compression to use for data written to  the
          output  file:   none  for  no compression, packbits for
          PackBits compression, jpeg for baseline  JPEG  compres-
          sion,  zip for Deflate compression, and lzw for Lempel-
          Ziv & Welch compression (default).

          LZW compression can be specified together with a  pred-
          ictor  value.  A predictor value of 2 causes each scan-
          line of the output image  to  undergo  horizontal  dif-
          ferencing  before  it  is  encoded; a value of 1 forces
          each  scanline  to  be  encoded  without  differencing.
          LZW-specific  options  are  specified  by  appending  a
          ``:''-separated list to the ``lzw''  option;  e.g.   -c
          lzw:2 for LZW compression with horizontal differencing.

     -p   Specify the planar  configuration  to  use  in  writing
          image  data.  By default, tiffsv will create a new file
          with the data samples packed contiguously.   Specifying
          -p  contig  will  force  data to be written with multi-
          sample data packed together,  while  -p  separate  will
          force samples to be written in separate planes.

     -r   Specify the number of rows (scanlines) in each strip of
          data  written  to  the output file.  By default, tiffsv
          attempts to set the rows/strip  that  no  more  than  8
          kilobytes of data appear in a strip.

NOTE

     Except for the use of TIFF, this program  is  equivalent  to
     the standard scrsave program.  This means, for example, that
     you can use it in conjunction with the standard icut program

                  Last change: October 15, 1995                 1

TIFFSV(1)                USER COMMANDS                  TIFFSV(1)

     simply  by  creating a link called scrsave, or by creating a
     shell script called scrsave that  invokes  tiffgt  with  the
     appropriate options.

BUGS

     If data are saved compressed and in  separate  planes,  then
     the rows in each strip is silently set to one to avoid limi-
     tations in the libtiff(3) library.

SEE ALSO

     scrsave(6D) pal2rgb(1), tiffdump(1), tiffgt(1), tiffinfo(1),
     tiffcp(1), tiffmedian(1), libtiff(3)

                  Last change: October 15, 1995                 2