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Pamrgbtopng User Manual(0)                          Pamrgbtopng User Manual(0)

       pamrgbatopng - convert PAM color/transparency image to PNG

       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.

       This program is part of Netpbm(1).

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

       The input image if from the file named by the pamfile argument, or Standard Input if you don't specify pamfile.
       The output goes to Standard Output.

       The  maxval  of  the  input image must be 255.  You can use pamdepth to change the maxval of an image to 255 if

       pnmtopng(1)isamuchmorepowerful program for generating PNG images from Netpbm images, but  it  cannot  take  PAM
       images  with  transparency  as input.  To supply transparency information, you must supply it in a separate PGM
       image.  That makes it considerably less convenient to use.

       (But note that pnmtopng takes PAM images, even with RGB_ALPHA tuple type just fine -- it just ignores the alpha

       Netpbm's  strategic  direction  is  to  add  to pnmtopng all the capabilities of pamrgbatopng and retire pamrt-
       batopng.  But there's no telling when that will happen.


       pam(1) pnmtopng(1) pngtopam(1)

       pamrgbatopng was new in Netpbm 10.30 (October 2005).

netpbm documentation             24 July 2006       Pamrgbtopng User Manual(0)