1Pamrgbtopng User Manual(0)                          Pamrgbtopng User Manual(0)
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NAME

6       pamrgbatopng - convert PAM color/transparency image to PNG
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SYNOPSIS

10       pamrgbatopng [pamfile]
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12       Minimum  unique abbreviation of option is acceptable.  You may use dou‐
13       ble hyphens instead of single hyphen to denote options.   You  may  use
14       white space in place of the equals sign to separate an option name from
15       its value.
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DESCRIPTION

19       This program is part of Netpbm(1).
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21       pamrgbatopng reads a PAM image with the RGB_ALPHA tuple type  (a  color
22       visual image with transparency) and produces an equivalent PNG image as
23       output.
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25       The input image if from the file named  by  the  pamfile  argument,  or
26       Standard  Input if you don't specify pamfile.  The output goes to Stan‐
27       dard Output.
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29       The maxval of the input image must be 255.  You  can  use  pamdepth  to
30       change the maxval of an image to 255 if necessary.
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32       pnmtopng(1)isamuchmorepowerful  program  for generating PNG images from
33       Netpbm images, but it cannot  take  PAM  images  with  transparency  as
34       input.   To  supply  transparency  information, you must supply it in a
35       separate PGM image.  That makes it considerably less convenient to use.
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37       (But note that pnmtopng takes PAM images,  even  with  RGB_ALPHA  tuple
38       type just fine -- it just ignores the alpha plane).
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40       Netpbm's strategic direction is to add to pnmtopng all the capabilities
41       of pamrgbatopng and retire pamrtbatopng.  But there's no  telling  when
42       that will happen.
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OPTIONS

47       None.
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SEE ALSO

51       pam(1) pnmtopng(1) pngtopam(1)
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HISTORY

55       pamrgbatopng was new in Netpbm 10.30 (October 2005).
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59netpbm documentation             24 July 2006       Pamrgbtopng User Manual(0)