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RLESWAP(1)							    RLESWAP(1)

NAME
       rleswap - swap the channels in an RLE file.

SYNOPSIS
       rleswap	[  -v ] [ -f from-channels,...	] [ -t to-channels,...	] [ -d
       delete-channels,...  ] [ -p channel-pairs,...   ]  [  -o	 outfile  ]  [
       infile ]

DESCRIPTION
       This  program  can  be  used  to select or swap the color channels in a
       RLE(5) file.  The major options provide four different ways of specify‐
       ing  a  mapping	between	 the channels in the input file and the output
       file.  Only one of the options -f, -t, -d, or -p may be specified.   If
       the  optional  infile  is  not  given, input will be read from standard
       input.  A new RLE(5) file will be written to the standard output or  to
       outfile,	 if specified.	The output image will be similar to the input,
       except for the specified channel remappings.

OPTIONS
       -v     Print the channel mappings that will be performed on  the	 stan‐
	      dard error output.

       -f     Following this option is a comma separated list of numbers indi‐
	      cating the input channel that maps to  each  output  channel  in
	      sequence.	  I.e.,	 the  first number indicates the input channel
	      mapping to output channel 0.  The alpha channel will  be	passed
	      through  unchanged if present.  Any input channels not mentioned
	      in the list will not appear in the output.

       -t     Following this option is a comma separated list of numbers indi‐
	      cating  the  output  channel  to	which  each  input channel, in
	      sequence, will map.  I.e., the first  number  gives  the	output
	      channel  to  which  the first input channel will map.  No number
	      may be repeated in this list.  The alpha channel will be	passed
	      through  unchanged if present.  Any output channel not mentioned
	      in the list will not receive image data.	 If  there  are	 fewer
	      numbers  in  the	list than there are input channels, the excess
	      input channels will be ignored.  If there are more numbers  than
	      input channels, it is an error.

       -d     Following this option is a comma separated list of numbers indi‐
	      cating channels to be deleted from the input  file.   All	 other
	      channels	will  be  passed through unchanged.  The alpha channel
	      may be specified as -1.

       -p     Following this option is a comma	separated  list	 of  pairs  of
	      channel  numbers.	  The  first  channel of each pair indicates a
	      channel in the input file that will be mapped to the the channel
	      in  the  output file indicated by the second number in the pair.
	      No output channel number may appear more than once.   Any	 input
	      channel  not  mentioned will not appear in the output file.  Any
	      output channel not mentioned will not receive image  data.   The
	      alpha channel may be specified as -1.

SEE ALSO
       mergechan(1), urt(1), RLE(5).

AUTHOR
       Spencer W. Thomas, University of Utah

4th Berkeley Distribution	 Jan 22, 1987			    RLESWAP(1)

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