nn::font and nn::ui2d share similar file structures. Some are used in nn::font Bffnt as well as nn::ui2d Bflyt and Bflan. This style of file may be a holdover from the 32-bit era, as newer ui2d formats like Bnvg have an nn::util style.
The base struct of an nn::ui2d style file.
| Offset
|
Size
|
Type
|
Description
|
| 0x0
|
0x4
|
u32
|
Magic (dependent on file type)
|
| 0x4
|
0x2
|
u16
|
Endianess (0xfffe in big-endian)
|
| 0x6
|
0x2
|
u16
|
Header size
|
| 0x8
|
0x2
|
u16
|
Micro version
|
| 0xa
|
0x1
|
u8
|
Minor version
|
| 0xb
|
0x1
|
u8
|
Major version
|
| 0xc
|
0x4
|
u32
|
File size
|
| 0x10
|
0x2
|
u16
|
Section count
|
| 0x12
|
0x2
|
u16
|
Reserved
|
Section
The base struct of a sub section in an nn::ui2d style file.
| Offset
|
Size
|
Type
|
Description
|
| 0x0
|
0x4
|
u32
|
Magic (dependent on file type)
|
| 0x4
|
0x4
|
u32
|
Section size
|
User Data
Typically only found in Bflyt and Bflan.
Section
| Offset
|
Size
|
Type
|
Description
|
| 0x0
|
0x8
|
Ui2dSection
|
Ui2d Section
|
| 0x8
|
0x2
|
u16
|
User data count
|
| 0xa
|
0x2
|
u16
|
Reserved
|
User Data Entry
Array immediately follows User Data Section header.
| Offset
|
Size
|
Type
|
Description
|
| 0x0
|
0x4
|
u32
|
Name offset (relative to this entry)
|
| 0x4
|
0x4
|
u32
|
Data array offset (relative to this entry)
|
| 0x8
|
0x2
|
u16
|
Data count
|
| 0xa
|
0x1
|
u8
|
Data type
|
| 0xb
|
0x1
|
u8
|
Reserved
|
User Data Type
| Name (unofficial)
|
Value
|
Description
|
| String
|
0x0
|
|
| S32
|
0x1
|
|
| Float
|
0x2
|
|
| SystemData
|
0x3
|
Unknown
|