Pngtopnm User Manual(0) Pngtopnm User Manual(0)NAMEpngtopnm - convert a PNG image into a PNM image
SYNOPSISpngtopnm [-verbose] [-alpha | -mix] [-background=color] [-gamma=value]
[-text=filename] [-time] [pngfile]
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).
pngtopnm was obsoleted by pngtopam(1),introducedwithNetpbm10.44 (Sep‐
tember 2008). pngtopam is backward compatible with pngtopnm, plus adds
many additional functions, including the ability to produce a PAM image
that includes an alpha (transparency) channel.
Starting in Release 10.48, pngtopnm is just an alias for pngtopam.
pngtopnm remained in the Netpbm package through Release 10.47 because
it may have fewer bugs than pngtopam in those releases, and may be
faster in some environments. But pngtopnm's incompatibility with the
most current PNG libraries makes it impractical to maintain along with
pngtopam now.
In releases before 10.48, you can use the pngtopam documentation for
pngtopnm, considering the following differences:
· pngtopnm options are a subset of pngtopam's, as documented
above.
· Any change that the pngtopam manual says happened in or after
Netpbm 10.44 doesn't apply to pngtopnm.
netpbm documentation 22 July 2008 Pngtopnm User Manual(0)
