BFFNT File Format

NintendoWare > Font File (FFNT)

Offset	Size	Description
0x0	4	Magic number ("FFNT")
0x4	2	Endianness (0xFEFF)
0x6	2	Header size (0x14)
0x8	4	Version number
0xC	4	Filesize
0x10	2	Number of sections
0x12	2	Padding
0x14		Sections. All sections are aligned to 4 bytes.

Info Section

Contains general information about the font.

Offset	Size	Description
0x0	4	Identifier ("FINF")
0x4	4	Section size
0x8	1	Font type
0x9	1	Width
0xA	1	Height
0xB	1	Ascent
0xC	2	Line feed
0xE	2	Invalid char symbol index
0x10	1	Unknown
0x11	1	Unknown
0x12	1	Unknown
0x13	1	Character code
0x14	4	Offset to texture section
0x18	4	Offset to width section
0x1C	4	Offset to code map section

Texture Section

A font may consist of multiple texture sheets. The texture data of each sheet is stored directly after each other. Every cell contains a single glyph texture.

Offset	Size	Description
0x0	4	Identifier ("TGLP")
0x4	4	Section size
0x8	1	Cell width
0x9	1	Cell height
0xA	1	Number of sheets
0xB	1	Unknown
0xC	4	Sheet size
0x10	2	Baseline position
0x12	2	Texture format
0x14	2	Cells per row
0x16	2	Cells per column
0x18	2	Texture width
0x1A	2	Texture height
0x1C	4	Texture data offset

Texture Format	GX2SurfaceFormat
0	GX2_SURFACE_FORMAT_UNORM_R8_G8_B8_A8
12	GX2_SURFACE_FORMAT_UNORM_BC4

Width Section

Contains width information for a range of glyphs.

Offset	Size	Description
0x0	4	Identifier ("CWDH")
0x4	4	Section size
0x8	2	First glyph index
0xA	2	Last glyph index
0xC	4	Size of width data
0x10		Width data

Width Entry

Offset	Size	Description
0x0	1	Distance from left cell border to character
0x1	1	Cell width
0x2	1	Character width

Code Map Section

Assigns glyphs to a range of character codes.

Offset	Size	Description
0x0	4	Identifier ("CMAP")
0x4	4	Section size
0x8	2	First character code
0xA	2	Last character code
0xC	2	Mapping type
0xE	2	Padding
0x10	4	Size of mapping data
0x14		Mapping data

Code Map Type 0

Offset	Size	Description
0x0	2	base_index. The first character code is mapped to base_index. The second is mapped to base_index + 1, and so on.

Code Map Type 1

If a glyph index is 0xFFFF it indicates an invalid character.

Offset	Size	Description
0x0	2	Glyph index of first character code
0x2	2	Glyph index of second character code
...	...	...
...	2	Glyph index of last character code

Code Map Type 2

The first and last character code in the section header are ignored.

Offset	Size	Description
0x0	2	Number of entries
0x2	2	Character code 1
0x4	2	Glyph index 1
0x6	2	Character code 2
0x8	2	Glyph index 2
...	...	...