ipack - Online in the Cloud

PROGRAM:

NAME

ipack - Manipulate Flex files containing Shapes

SYNOPSIS

ipack -c SCRIPT

ipack -x SCRIPT

ipack -u SCRIPT

DESCRIPTION

Flex files containing Shapes are used for the storage visual elements by the games Exult
supports. While expack(1) can operate on such files, using ipack is more comfortable. It
can extract images from the Flex file directly into PNG-format, and create or update Flex
files from a list of PNG files.

The first parameter determines the mode of operation:

-c Creation
New Flex and palette files are created according to the instructions contained in
the SCRIPT file.

-u Update
Works like Creation, but updates an existing Flex file.

-x Extraction
The contents of the Flex file described in the SCRIPT file are extracted as PNG is
dissected into its contents, as described in this script file.

Script File Format
Empty lines, and lines starting with a pound sign (#) are ignored.

The names of the associated Flex archive and palette files are given in lines containing
optional whitespace, one of the tokens archive or palette, whitespace, and the filename.

Other lines define one shape each, and must begin with an image slot number, followed by a
slash (/), the number of frames, a colon (:), and finally the PNG file specification. The
numbers may be given either in decimal, in octal prefixed with 0; or in hexadecimal
prefixed with 0x. The file specification consists of the filename PREFIX, optionally
followed by a number and direction in brackets, optionally followed by whitespace and the
word flat.

Per default, each shape corresponds to a number of PNG files (one for each frame) named
PREFIXnn.png with nn replaced by the frame number. If the optional bracket expression is
used in the specification the Shape corresponds to a single PNG file instead. This file
contains all frames, each of which is 8 by 8 pixels in size, arranged next to each other
in a rectangular grid. The number in the bracket expression gives the size of this grid in
the direction indicated. The direction can be either down or across.

EXAMPLES

ipack -c island.scr
Creates a Flex file and a palette file as specified by island.scr.

ipack -x island.scr
Extracts all components described in island.scr from the Flex file given therein.

Example script
# script file for island.flx
archive island.flx
# put the palette into this file
palette island.pal
# the zeroth image has 32 frames in the files
# zero00.png to zero31.png
0/32:zero
# image 5 consists of 22 frames stored in file
# five.png in a grid 5 frames across (which means
# 5 rows of which the last holds only 2 frames)
5/22:five(5 across) flat
# image 4 consists of 12 frames stored in file
# four.png in a 3 by 4 grid
4/12:four(4 down) flat
# images 1 to 3 are unspecified

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