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pamrgbatopng(1) |
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pamrgbatopng
Updated: 24 July 2006
Table Of Contents
NAME
pamrgbatopng - convert PAM color/transparency image to PNG
SYNOPSIS
pamrgbatopng [pamfile]
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.
DESCRIPTION
This program is part of Netpbm.
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
Standard 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 is a much more powerful
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 pnmtopng pngtopnm
HISTORY
pamrgbatopng was new in Netpbm
10.30 (October 2005).
_________________________________________________________________
Table Of Contents
* NAME
* SYNOPSIS
* DESCRIPTION
* OPTIONS
* SEE ALSO
* HISTORY
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pamrgbatopng(1) | |