pngtopnm - Convert a PNG image to PNM: replaced by pngtopam
pngtopnm [
-verbose] [
-alpha |
-mix] [
-background=
color] [
-gamma=
value] [
-text=
filename] [
-time] [
pngfile]
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).
pngtopnm was obsoleted by
pngtopam(1), introduced with
Netpbm 10.44 (September 2008).
pngtopam is backward compatible with
pngtopnm, plus adds many additional functions, including the ability to
produce a PAM image that includes a transparency (alpha) 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.
This manual page was generated by the Netpbm tool 'makeman' from HTML source.
The master documentation is at
- http://netpbm.sourceforge.net/doc/pngtopnm.html