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



NAME
       pamrgbatopng - convert PAM color/transparency image to PNG


SYNOPSIS
       pamrgbatopng [pamfile]

       Minimum	unique abbreviation of option is acceptable.  You may use dou-
       ble 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(1).

       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	 argument,  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  pamdepth  to
       change the maxval of an image to 255 if necessary.

       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 plane).

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



OPTIONS
       None.


SEE ALSO
       pam(1) pnmtopng(1) pngtopam(1)


HISTORY
       pamrgbatopng was new in Netpbm 10.30 (October 2005).



netpbm documentation		 24 July 2006	    Pamrgbtopng User Manual(0)