AIG (File Format)

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AIG (Aqualead ImaGe) is a texture format developed by Aqualead and found in some Wii and 3DS games (and suspected to be used in GameCube titles as well), such as One Piece: Unlimited Adventure, One Piece: Unlimited Cruise Episode 1 - The Treasure Beneath The Waves, One Piece: Unlimited Cruise Episode 2: Awakening of a Hero, One Piece: Unlimited Cruise SP and One Piece: Unlimited Cruise SP 2.

File Format

The file byte order can be either big endian (Wii) or little endian (3DS).

Header

The file starts with the following header:

Header

The file starts with the following header:

Offset	Type	Description
0x00	Char[4]	File magic. Always ALIG in ASCII.
0x04	Byte	Format type. 0 is used in AFT font files, 2 elsewhere?
0x05	Byte	Unknown. 1 if using alpha?
0x06	UInt16	Unknown.
0x08	Char[4]	Image format.
0x0C	Char[4]	Palette format? Seen as "RGBA" in files with palettes, otherwise, 0x00000000.
If format = 2
0x10	UInt16	Width of image in pixels, always in little endian.
0x12	UInt16	Height of image in pixels, always in little endian.
0x14	Byte[4]	Unknown.
0x18	Byte[4]	Unknown.
0x1C	UInt32	Image data offset, always in little endian.
0x20	UInt32	Texture data size in bytes.
0x24	Byte[4]	Unknown.
0x28	Byte[24]	Unknown. Padding?

Image Formats

Format	Description
8888	RGBA8888
5551	RGBA5551
4444	RGBA4444
PAL8	Unknown palette format
PAL4	Unknown palette format
PL4R	Unknown palette format
PAL1	Unknown palette format
G5A3	RGB5A3
GC32	RGBA8
GCCP	CMPR
GCI4	I4
GCI8	I8
GIA4	IA4
GIA8	IA8
GA4C	Unknown
GA8C	Unknown
GACC	2 CMPR textures, the first one is used as the main color texture and the second one is used as an alpha mask
GA45	Unknown
GA85	Unknown
GAC5	Unknown
G565	RGB565

Tools

The following tools can handle AIG files:

• (none)