Usage: grabpng [[options] <file1> [file2] [...]]
Put grabpng anywhere you like. Make a shortcut to it on your
desktop or in your programs menu. If you want to use grabpng
in batch mode, you'll want to add its location to your PATH
If you are not sure what your PATH environment variable is,
but you still want to use grabpng in batch mode, just put it
If you installed grabpng correctly you can click the icon or
type "grabpng" at the command line to use the visual editor.
If you are using grabpng from the command line you have
powerful batch options available to you:
-grab <x> <y> Set contents of grAb chunk in files.
-alph Create alPh chunk in files.
-noalph Remove alPh chunk from files.
The <x> and <y> -grab values can be expressions.
Variables allowed in expressions are:
w - image width
h - image height
Constants allowed in expressions are:
W - 320
H - 200
Ctrl-S Save current image
Z Load previous image in directory
X Load next image in directory
L Lock guides
Tab Select next control
Arrows Select controls
Space Activate selected control
Esc Quit program
# Load the visual editor.
# Load mymonster.png in the visual editor.
# Grab two pngs at their centers and set alPh chunks.
grabpng -grab w/2 h/2 -alph mydecal.png mydecal2.png
# Grab all pngs in the current directory at their horizontal
# center, 4 pixels from the bottom of the image.
grabpng -grab w/2 h-4 *.png