Re: Hi-res picture packer?

[Andy McFadden <fadden@fadden.com>]

John B. Matthews <nospam@nospam.invalid> wrote:
> $ unzip -l compression.zip 
> Archive:  compression.zip
>   Length     Date   Time    Name
>  --------    ----   ----    ----
>    143360  07-19-09 11:07   compressors/BeagleGraphics.dsk
>    143360  01-24-08 17:47   compressors/HiresPicPac.dsk

You need to use "-v" to see the interesting part:

 Length   Method    Size  Ratio   Date   Time   CRC-32    Name
--------  ------  ------- -----   ----   ----   ------    ----
  143360  Implode   60517  58%  07-19-09 11:07  57c98c50  compressors/BeagleGraphics.dsk
  143360  Implode   65726  54%  01-24-08 17:47  d0bace05  compressors/HiresPicPac.dsk
 ...

Note the method is "Implode", which went out of vogue many years ago
after Unisys got twitchy about LZW.

It'd be more portable -- and 50KB smaller -- if the common Deflate
algorithm were used.

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