IA8

General Information

• Codec Name: IA8
• Found in: Gamecube/Wii games and possibly other Nintendo related games
• Type: Color encoding
• Endianness: Any
• Rainbow's implementation: ColorCodecIA8
• Additional info: N/A

Codec Specification

IA8 colors denote grayscale colors with alpha. Each IA8 color is encoded as a uint16 (two bytes) where the first byte is the alpha value and the second byte is the grayscale intensity.

uint16 color = AAAAAAAAIIIIIIII

Decoding to a full 8-bit RGBA color is as follows:

uint8 alpha = AAAAAAAA

uint8 red = green = blue = IIIIIIII