BRLYT (File Format)

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BRLYT files (Binary Revolution LaYouT) are the files used as layout in the Wii system. They manage how the UI TPL images show in the game, with specified flags such as material settings, colors, positions, size, rotations and more. BRLYT files are used with BRLAN animations, BRFNT fonts and also with BRCTR files in Mario Kart Wii. They are always found into blyt folders.

File Format

Header

The file starts with a header that is 0x10 bytes long:

Offset	Type	Description
0x00	String	File magic. Always RLYT in ASCII.
0x04	UInt16	Byte order mark (BOM): The value is always 0xFEFF. If value 0xFFFE is read, then the false endian is used. Mario Kart Wii uses nearly always big endian (bytes 0xFE,0xFF).
0x06	UInt16	Version number of the file format.
0x08	UInt32	Length of the file in bytes.
0x0C	UInt16	Length of this header in bytes.
0x0E	UInt16	Number of sections.
0x10	End of file header

Sections

BRLYT files constist of many different sections. The section can be identified by checking the first four bytes; it is a magic that identifies the section.

lyt1

The lyt1 sections comes after the header and defines the main layout.

Offset	Type	Description
0x00	String	Section magic. Always lyt1 in ASCII.
0x04	UInt32	Section size.
0x08	Byte	Is Centered.
0x09	Byte[3]	Padding?
0x0C	Float	Width.
0x10	Float	Height.

txl1

The txl1 sections stores TPL filenames. The section starts with a header:

Offset	Type	Description
0x00	String	Section magic. Always txl1 in ASCII.
0x04	UInt32	Section size.
0x08	UInt16	Number of TPL filenames.
0x0A	UInt16	Unknown.

After this section header comes the offsets to the strings. Each entry has the following structure.

Offset	Type	Description
0x00	UInt32	Offset to a TPL filename which is stored as a null-termined string. Relative to the start of the txl1 section.
0x04	UInt32	Padding.

mat1

The mat1 section holds data about materials used in the layout. The section starts with a header:

Offset	Type	Description
0x00	String	Section magic. Always mat1 in ASCII.
0x04	UInt32	Section size.
0x08	UInt16	N= Number of materials.
0x0A	UInt16	Unknown.
0x0C	UInt32[N]	Offsets to the materials. Relative to the start of this section.

Each material is the following structure:

Offset	Type	Description
0x00	String	Material name. The length is always 0x14, unused bytes are set to 00.
0x14	Int16[4]	Fore Color in RGBA format.
0x1C	Int16[4]	Back Color in RGBA format.
0x24	Byte[4]	TEV Color 1 in RGBA format.
0x28	Byte[4]	TEV Color 2 in RGBA format.
0x2C	Byte[4]	TEV Color 3 in RGBA format.
0x30	Byte[4]	TEV Color 4 in RGBA format.
0x34	UInt32	Flags.

fnl1

The fnl1 section is a list of fonts.

Offset	Type	Description
0x00	String	Section magic. Always fnl1 in ASCII.
0x04	UInt32	Section size.
0x08	UInt16	N = Number of fonts.
0x0A	UInt16	Unknown.

After this section header comes the offsets to the strings. Each entry has the following structure.

Offset	Type	Description
0x00	UInt32	Offset to a font filename which is stored as a null-termined string. Relative to the start of the fnl1 section.
0x04	UInt32	Padding.

pan1

The pan1 section contains information about a pane and starts a pane.

Offset	Type	Description
0x00	String	Section magic. Always pan1 in ASCII.
0x04	UInt32	Section size.
0x08	Byte	Visibility.
0x09	Byte	Origin.
0x0A	Byte	Alpha.
0x0B	Byte	Padding.
0x0C	String	Pane name. The length is always 0x10, unused bytes are set to 00.
0x1C	String	User data.
0x24	Float[3]	Translation.
0x30	Float[3]	Rotation.
0x3C	Float[2]	Scale.
0x44	Float	Width.
0x48	Float	Height.

pas1

The pas1 section is used as start of pane children data, after this section other panes can be defined. pae1 ends it.

Offset	Type	Description
0x00	String	Section magic. Always pas1 in ASCII.
0x04	UInt32	Section size.

pae1

The pae1 section is used to end pane children. pas1 starts it.

Offset	Type	Description
0x00	String	Section magic. Always pae1 in ASCII.
0x04	UInt32	Section size.

grp1

The grp1 section defines a group.

Offset	Type	Description
0x00	String	Section magic. Always grp1 in ASCII.
0x04	UInt32	Section size.
0x08	String	Group name. The length is always 0x10 bytes long, unused characters are set to 00.
0x18	UInt16	N = Number of entries.
0x1A	UInt16	Unknown.
0x1C	String[N]	An array of entries in this group. The length of each string is always 0x10, unused characters are set to 00.

pic1

The pic1 section defines an image.

Offset	Type	Description
0x00	String	Section magic. Always grp1 in ASCII.
0x04	UInt32	Section size.
0x08	Byte	Visibility.
0x09	Byte	Origin.
0x0A	Byte	Alpha1.
0x0B	Byte	Alpha2.
0x0C	String	Image name. The length is always 0x18, unused characters are set to 00.
0x24	Float[3]	Position.
0x30	Float[2]	Flip.
0x38	Float	Angle.
0x3C	Float[2]	Mag.
0x44	Float	Width.
0x48	Float	Height.

txt1

Unknown.

Offset	Type	Description
0x00	String	Section magic. Always txt1 in ASCII.

bnd1

Unknown.

Offset	Type	Description
0x00	String	Section magic. Always bnd1 in ASCII.

grs1

The grs1 section defines a group of groups. gre1 ends the group of groups.

Offset	Type	Description
0x00	String	Section magic. Always grs1 in ASCII.

gre1

The gre1 section ends a group of groups. grs1 starts the group of groups.

Offset	Type	Description
0x00	String	Section magic. Always gre1 in ASCII.

Tools

The following tools can handle BRLYT files:

• Benzin, by SquidMan, comex, megazig, and Yossi (converts BRLYT to XML and viceversa)
• Wii Layout Editor, by Gericom