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RLEBG(1)               DragonFly General Commands Manual              RLEBG(1)

NAME
       rlebg - generate simple backgrounds

SYNOPSIS
       rlebg [ -l ] [ -v [ top [ bottom ] ] ] [ -s xsize ysize ] [ -o outfile
       ] red green blue [ alpha ]

DESCRIPTION
       rlebg generates a simple background.  These are typically used for
       compositing below other images.  The values red green blue specify the
       pixel values (between 0 and 255) the background will have.  If alpha is
       not specified, it defaults to 255 (full coverage).  rlebg generates
       both constant backgrounds and backgrounds with continuous ramps.

OPTIONS
       -s xsize ysize
              This is the size of the background image.  The default is
              512x480.

       -l     Generate a linear ramp of pixel values.  If no ramp flag is
              given, rlebg generates a constant background.

       -v top bottom
              Generate a variable ramp, using a quadratic function (this looks
              best with gamma corrected images).  top and bottom are the
              fractions of the full color values at the top and bottom of the
              image.  The defaults are 1.0 0.1, respectively.  If both -v and
              -l are given, then a linear ramp function is used instead of a
              quadratic ramp.

       -o outfile
              If specified, the output will be written to this file.  If
              outfile is "-", or if it is not specified, the output will be
              written to the standard output stream.

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

AUTHOR
       Rod Bogart

4th Berkeley Distribution      November 12, 1986                      RLEBG(1)