NUT (File Format)
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NUT (Namco Universal Texture) is a texture format used in Super Smash Bros 4 for Wii U.
File Format
Header
The file starts with a 0x18 byte long header:
| Offset | Type | Description |
|---|---|---|
| 0x00 | Char[4] | File magic Always NTWU (Namco Texture Wii U) or NTP3 (Namco Texture Playstation 3). |
| 0x04 | UInt16 | Unknown. Usually seen as 0x020E. |
| 0x06 | UInt16 | Number of textures. |
| 0x08 | UInt32 | Unknown. |
| 0x0C | UInt32 | Unknown. |
GIDX
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt32 | Total size. Size of this entry plus the total image data size. |
| 0x04 | UInt32 | Unknown. |
| 0x08 | UInt32 | Total image data size in bytes, including the main image and all mipmaps. |
| 0x0C | UInt16 | Size of this entry in bytes. |
| 0x0E | UInt16 | Unknown. |
| 0x10 | UInt16 | Number of mipmaps. |
| 0x12 | UInt16 | Image format. |
| 0x14 | UInt16 | Image width in pixels. |
| 0x16 | UInt16 | Image height in pixels. |
| 0x18 | UInt32 | Unknown. |
| 0x1C | UInt32 | Unknown. |
| 0x20 | UInt32 | Image data offset. |
| 0x24 | UInt32 | Mipmap data offset. |
| 0x28 | UInt32 | Surface info offset. |
| 0x2C | UInt32 | Unknown. |
| 0x30 | UInt32 | Image data size in bytes. |
| 0x34 | UInt32 | Mipmap data size in bytes. |
| 0x38 | UInt32 | Unknown. |
| 0x3C | UInt32 | Unknown. |
| 0x40 | UInt32 | Unknown. |
| 0x44 | UInt32 | Unknown. Only seen as 0x20. |
| 0x48 | UInt32 | Unknown. Only seen as 0x10. |
| 0x4C | UInt32 | Unknown. |
| 0x50 | Char[4] | Section magic. Always GIDX in ASCII. |
| 0x54 | UInt32 | Unknown. Only seen as 0x10. |
| 0x58 | UInt32 | Unknown. |
| 0x5C | UInt32 | Unknown. |
Surface Info
| Offset | Type | Description | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x00 | UInt32 | Texture dimension. | |||||||||||||||||||||
| 0x04 | UInt32 | Texture width in pixels. | |||||||||||||||||||||
| 0x08 | UInt32 | Texture height in pixels. | |||||||||||||||||||||
| 0x0C | UInt32 | Texture depth in pixels. | |||||||||||||||||||||
| 0x10 | UInt32 | Number of mipmaps. | |||||||||||||||||||||
| 0x14 | UInt32 | Texture format. | |||||||||||||||||||||
| 0x18 | UInt32 | AA mode. | |||||||||||||||||||||
| 0x1C | UInt32 | Usage. | |||||||||||||||||||||
| 0x20 | UInt32 | Data length. Length of texture data in bytes. | |||||||||||||||||||||
| 0x24 | UInt32 | Data pointer. Set at runtime. | |||||||||||||||||||||
| 0x28 | UInt32 | Mipmaps data length. Length of mipmaps data in bytes. | |||||||||||||||||||||
| 0x2C | UInt32 | Mipmaps pointer. Set at runtime. | |||||||||||||||||||||
| 0x30 | UInt32 | Tile mode. | |||||||||||||||||||||
| 0x34 | UInt32 | Swizzle value. | |||||||||||||||||||||
| 0x38 | UInt32 | Alignment. | |||||||||||||||||||||
| 0x3C | UInt32 | Pitch. | |||||||||||||||||||||
| 0x40 | UInt32[13] | Mipmap offsets. An array of 13 offsets for each mipmap, relative to the start of the mipmap data. | |||||||||||||||||||||
| 0x74 | UInt32 | First mipmap ID. | |||||||||||||||||||||
| 0x78 | UInt32 | Number of available mipmaps. | |||||||||||||||||||||
| 0x7C | UInt32 | First slice ID. | |||||||||||||||||||||
| 0x80 | UInt32 | Number of available slices. | |||||||||||||||||||||
| 0x84 | Byte[4] | Component Selector, determines which texture color channels are used for each target channel. The bytes map to the Red, Green, Blue and Alpha channel and can receive one of the following channels.
| |||||||||||||||||||||
| 0x88 | UInt32[5] | Texture registers. 5 registers used to describe the texture. |
Tools
The following tools can handle NUT files:
- (none)
