pamrgbatopng

                                 pamrgbatopng

   Updated: September 2005
   Table Of Contents

NAME

   pamrgbatopng - convert PAM color/transparency image to PNG

SYNOPSIS

   pamrgbatopng [pamfile]

   Minimum  unique  abbreviation of option is acceptable. You may
use double
   hyphens instead of single hyphen to denote  options.  You  may
use white space
   in  place  of  the equals sign to separate an option name from
its value.

DESCRIPTION

   This program is part of Netpbm.

   pamrgbatopng reads a PAM image with the RGB_ALPHA  tuple  type
(a color visual
   image  with transparency) and produces an equivalent PNG image
as output.

   The input image if from the file named by  the  pamfile  argu-
ment, or Standard
   Input  if  you don’t specify pamfile. The output goes to Stan-
dard Output.

   The maxval of the input image must be 255.  You  can  use  pn-
mdepth to change
   the maxval of an image to 255 if necessary.

   pnmtopng  is  a  much more powerful program for generating PNG
images from
   Netpbm  images,  but  it  cannot  take  PAM images  as  input.
To supply
   transparency information, you must supply it in a separate PGM
image. That
   makes it considerably less convenient to use.

   Netpbm’s strategic direction is to add to pnmtopng all the ca-
pabilities of
   pamrgbatopng  and  retire pamrtbatopng. But there’s no telling
when that will
   happen.

OPTIONS

   None.

SEE ALSO

   pam pnmtopng pngtopnm

HISTORY

   pamrgbatopng was new in Netpbm 10.30 (October 2005).
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Table Of Contents

     * NAME
     * SYNOPSIS
     * DESCRIPTION
     * OPTIONS
     * SEE ALSO
     * HISTORY