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 AdvanceMAME emulator.

To compress the files this utility uses the following strategies:

• Remove all ancillary chunks.
• Concatenate all the IDAT chunks.
• 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 compressed 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)