centos man page for advpng

AdvanceCOMP PNG Compression Utility(1)			      General Commands Manual			    AdvanceCOMP PNG Compression Utility(1)

NAME
       advpng - AdvanceCOMP PNG Compression Utility

SYNOPSIS
       advpng [-l, --list] [-z, --recompress] [-0, --shrink-0]
	    [-1, --shrink-fast] [-2, --shrink-normal [-3, --shrink-extra]
	    [-4, --shrink-insane] [-f, --force] [-q, --quiet]
	    [-h, --help] [-V, --version] FILES...
DESCRIPTION
       The main purpose of this utility is to recompress png files to get the smallest possible size.

       Please  note that this utility is not able to read a generic file. It's granted to be able to read only the files generated by the Advance-
       MAME emulator.

       To compress the files this utility uses the following strategies:
       o      Remove all ancillary chunks.
       o      Concatenate all the IDAT chunks.
       o      Use the 7zip Deflate implementation.

OPTIONS
       -l, --list FILES...
	      List the content of the specified files.

       -z, --recompress FILES...
	      Recompress the specified files. If the -1, -2, -3 options are specified it's used the smallest file choice from  the  previous  com-
	      pressed data and the new compression. If the -0 option is specified the file is always rewritten without any compression.

       -0, --shrink-store
	      Disable the compression. The file is only stored and not compressed. The file is always rewritten also if it's bigger.

       -1, --shrink-fast
	      Set the compression level to "fast".

       -2, --shrink-normal
	      Set the compression level to "normal". This is the default level of compression.

       -3, --shrink-extra
	      Set the compression level to "extra".

       -4, --shrink-insane
	      Set the compression level to "insane".

       -f, --force
	      Force the use of the new file also if it's bigger.

COPYRIGHT
       This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima

SEE ALSO
       advzip(1), advmng(1), advdef(1)

													    AdvanceCOMP PNG Compression Utility(1)