DKRDS Sprite Group (File Format)

DKRDS Sprite Group is the nameless file format used in Diddy Kong Racing DS that stores a formation of tiles and positions to create sprites. Its type identifier in assets.bin is 0x00.

Header

The file starts with a header that is 12 bytes long.

Offset	Type	Description
0x00	UInt16	Unknown. Always 0?
0x02	UInt16	Unknown. Number of sets? Always 1?
0x04	Int32	Maximum number of blocks in this group to be rendered on the screen.
0x08	Int32	Tile Generator offset. Always 0xC?
0x0C	End of header, start of Tile Generator

Tile Generator

All offsets from here on are always relative to the start of this section.

Offset	Type	Description
0x00	UInt16	Number of Tile Sets (S).
0x02	UInt16	Total number of tile texture blocks.
0x04	Tile Set[S]	Tile set entries, 8 bytes long each.

Tile Set

Each tile set links tile information blocks with tile texture data.

Offset	Type	Description
0x00	UInt16	Tile Texture Data offset.
0x02	UInt16	Tile Information Block offset.
0x04	UInt16	Number of tiles (T).
0x06	UInt16	Total texture data length in bytes, of all tiles in this set.

Tiles

After all tile set entries are defined, each pair of arrays, that is T tile information blocks, and then its corresponding T tile texture data chunks; are stored sequentially.

Tile Information Block

Each information block is 8 bytes long and stores position and tile format data.

Offset	Type	Description
0x00	Int16	Tile X position.
0x02	Int16	Tile Y position.
0x04	Byte	Number of 8x8 texture blocks for this tile.
0x05	Byte	Texture dimensions. Only the 4 least significant bits are taken into account: 0 = 8x8 1 = 16x16 2 = 32x32 3 = 64x64 4 = 16x8 5 = 32x8 6 = 32x16 7 = 64x32 8 = 8x16 9 = 8x32 10 = 16x32 11 = 32x64
0x06	UInt16	Unknown. Padding?

Tile Texture Data

Texture data is stored as swizzled 8x8 blocks in 16-color palette format (4 bits per pixel). Palette data is stored in separate files.

Tools

The following tools can handle DKRDS Sprite Group:

• (none)