Pamrgbtopng User Manual(0) Pamrgbtopng User Manual(0)NAMEpamrgbatopng - convert PAM color/transparency image to PNG
SYNOPSISpamrgbatopng [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 ALSOpam(1)pnmtopng(1)pngtopam(1)HISTORYpamrgbatopng was new in Netpbm 10.30 (October 2005).
netpbm documentation 24 July 2006 Pamrgbtopng User Manual(0)
