.TH "AdvanceCOMP PNG Compression Utility" 1
.SH NAME
advpng \(hy AdvanceCOMP PNG Compression Utility
.SH SYNOPSIS 
advpng [\(hyl, \(hy\(hylist] [\(hyz, \(hy\(hyrecompress] [\(hy0, \(hy\(hyshrink\(hy0]
.PD 0
.PP
.PD
	[\(hy1, \(hy\(hyshrink\(hyfast] [\(hy2, \(hy\(hyshrink\(hynormal [\(hy3, \(hy\(hyshrink\(hyextra]
.PD 0
.PP
.PD
	[\(hy4, \(hy\(hyshrink\(hyinsane] [\(hyf, \(hy\(hyforce] [\(hyq, \(hy\(hyquiet]
.PD 0
.PP
.PD
	[\(hyh, \(hy\(hyhelp] [\(hyV, \(hy\(hyversion] FILES...
.PD 0
.PP
.PD
.SH DESCRIPTION 
The main purpose of this utility is to recompress png
files to get the smallest possible size.
.PP
Please note that this utility is not able to read
a generic file. It\(cqs granted to be able to read only
the files generated by the AdvanceMAME emulator.
.PP
To compress the files this utility uses the following
strategies:
.PD 0
.IP \(bu
Remove all ancillary chunks.
.IP \(bu
Concatenate all the IDAT chunks.
.IP \(bu
Use the 7zip Deflate implementation.
.PD
.SH OPTIONS 
.TP
.B \(hyl, \(hy\(hylist FILES...
List the content of the specified files.
.TP
.B \(hyz, \(hy\(hyrecompress FILES...
Recompress the specified files. If the \(hy1, \(hy2, \(hy3
options are specified it\(cqs used the smallest file
choice from the previous compressed data and the
new compression. If the \(hy0 option is specified the
file is always rewritten without any compression.
.TP
.B \(hy0, \(hy\(hyshrink\(hystore
Disable the compression. The file is
only stored and not compressed. The file is always
rewritten also if it\(cqs bigger.
.TP
.B \(hy1, \(hy\(hyshrink\(hyfast
Set the compression level to \(a"fast\(a".
.TP
.B \(hy2, \(hy\(hyshrink\(hynormal
Set the compression level to \(a"normal\(a". This is the
default level of compression.
.TP
.B \(hy3, \(hy\(hyshrink\(hyextra
Set the compression level to \(a"extra\(a".
.TP
.B \(hy4, \(hy\(hyshrink\(hyinsane
Set the compression level to \(a"insane\(a".
.TP
.B \(hyf, \(hy\(hyforce
Force the use of the new file also if it\(cqs bigger.
.SH COPYRIGHT 
This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima
.SH SEE ALSO 
advzip(1), advmng(1), advdef(1)