etc1tool
is a command line utility that lets you encode PNG
images to the
ETC1
compression standard and decode ETC1 compressed images back to PNG.
The usage for
etc1tool
is:
etc1tool infile [--help | --encode | --encodeNoHeader | --decode] [--showDifference
diff-file] [-o outfile]
This table lists the command options:
Option
|
Description
|
infile
|
The input file to compress.
|
--help
|
Print usage information.
|
--encode
|
Create an ETC1 file from a PNG file.
This is the default mode for the tool if nothing is specified.
|
--encodeNoHeader
|
Create a raw ETC1 data file without a header from a PNG file.
|
--decode
|
Create a PNG file from an ETC1 file.
|
--showDifference
diff-file
|
Write the difference between the original and encoded image to
diff-file
. This option is only valid when encoding.
|
-o
outfile
|
Specify the name of the output file.
If
outfile
is not specified, the output file is constructed
from the input filename with the appropriate suffix (
.pkm
or
.png
).
|