lbee-utils

A small collection of utilities for exporting and importing assets from Little Busters! English Edition

Specifications and Info

^{Bytes are in Little Endian}

Each CZ# file starts with a header. The first 14 (0x0E) bytes of the header are common to all CZ# files. The data which come after that are specific to each format, although several CZ# formats do share the same layout.

Common header:

Offset	Ex. Values	ASCII	Purpose
0x00 - 0x03	43 5A 30 00	CZ0	Magic bytes
0x04 - 0x07	24 00 00 00	36	Header length in bytes
0x08 - 0x09	58 01	344	Width of the image in pixels
0x0A - 0x0B	DC 02	732	Height of the image in pixels
0x0C - 0x0D	20 00	32	Bit depth of the image
0x0E	03	3	Color block

The CZ0 and CZ3 header extra data:

Offset	Ex. Values	ASCII	Purpose
0x0F - 0x13	---	---	---[Unknown]---
0x14 - 0x15	58 01	344	Width of image crop
0x16 - 0x17	DC 02	732	Height of image crop
0x18 - 0x19	00 05	1280	Width of image bounding box
0x1A - 0x1B	34 03	820	Height of image bounding box
0x1C - 0x1D	80 02	640	X offset of image, optional
0x1E - 0x1F	02 03	770	Y offset of image, optional
0x20 - 0x23	---	---	---[Unknown]---, optional

The CZ2 header extra data:

Offset	Ex. Values	ASCII	Purpose
0x0F - 0x12	---	---	---[Unknown]---