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update info on TGLP, FINF & CMAP - thanks to Gericom/EveryFileExplorer
=CTR Font Format=
=CTR Font Format=
[[.bcfnt]] files are bitmap fonts made for the 3ds. this page is a stub and will be filled in soon.
[[.bcfnt]] files are bitmap fonts made for the 3ds. The system font uses this format too except the header is changed from CFNT to CFNU and all file offsets are changed to absolute in memory offsets.
=== CFNT Header ===
=== CFNT Header ===
| Number of "blocks" to read
| Number of "blocks" to read
|}
|}
=== CFNT Header ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00
| 0x04
| Magic Header (either CFNT or CFNU)
|-
| 0x04
| 0x02
| Unknown
|-
| 0x06
| 0x02
| Header Size
|-
| 0x08
| 0x04
| Unknown
|-
| 0x0C
| 0x04
| File size (the total)
|-
| 0x10
| 0x04
| Number of "blocks" to read
|}
=== FINF Header ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00
| 0x04
| Magic Header (FINF)
|-
| 0x04
| 0x04
| Section Size
|-
| 0x08
| 0x01
| Font Type
|-
| 0x09
| 0x01
| Line Feed
|-
| 0x0A
| 0x02
| Alter Char Index
|-
| 0x0C
| 0x03
| Default Width (3 bytes: Left, Glyph Width, Char Width)
|-
| 0x0F
| 0x01
| Encoding
|-
| 0x10
| 0x04
| TGLP Offset
|-
| 0x14
| 0x04
| CWDH Offset
|-
| 0x18
| 0x04
| CMAP Offset
|-
| 0x1C
| 0x01
| Height
|-
| 0x1D
| 0x01
| Width
|-
| 0x1E
| 0x01
| Ascent
|-
| 0x1F
| 0x01
| Padding
|}
=== TGLP Header ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00
| 0x04
| Magic Header (TGLP)
|-
| 0x04
| 0x04
| Section Size
|-
| 0x08
| 0x01
| Cell Width
|-
| 0x09
| 0x01
| Cell Height
|-
| 0x0A
| 0x01
| Baseline Position
|-
| 0x0B
| 0x01
| Max Character Width
|-
| 0x0C
| 0x04
| Sheet Size
|-
| 0x10
| 0x02
| Number of Sheets
|-
| 0x12
| 0x02
| Sheet Image Format 0-13: (RGBA8, RGB8, RGBA5551, RGB565, RGBA4, LA8, HILO8, L8, A8, LA4, L4, A4, ETC1, ETC1A4)
|-
| 0x14
| 0x02
| Number of Sheet rows
|-
| 0x16
| 0x02
| Number of Sheet lines
|-
| 0x18
| 0x02
| Sheet Width
|-
| 0x1A
| 0x02
| Sheet Height
|-
| 0x1C
| 0x04
| Sheet Data Offset
|}
=== FINF Header ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00
| 0x04
| Magic Header (FINF)
|-
| 0x04
| 0x04
| Section Size
|-
| 0x08
| 0x01
| Font Type
|-
| 0x09
| 0x01
| Line Feed
|-
| 0x0A
| 0x02
| Alter Char Index
|-
| 0x0C
| 0x03
| Default Width (3 bytes: Left, Glyph Width, Char Width)
|-
| 0x0F
| 0x01
| Encoding
|-
| 0x10
| 0x04
| TGLP Offset
|-
| 0x14
| 0x04
| CWDH Offset
|-
| 0x18
| 0x04
| CMAP Offset
|-
| 0x1C
| 0x01
| Height
|-
| 0x1D
| 0x01
| Width
|-
| 0x1E
| 0x01
| Ascent
|-
| 0x1F
| 0x01
| Padding
|}
=== CMAP Header ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x00
| 0x04
| Magic Header (CMAP)
|-
| 0x04
| 0x04
| Section Size
|-
| 0x08
| 0x02
| Code Begin
|-
| 0x0A
| 0x02
| Code End
|-
| 0x0C
| 0x02
| Mapping Method (0 = Direct, 1 = Table, 2 = Scan)
|-
| 0x0E
| 0x02
| Reserved?
|-
| 0x10
| 0x04
| Next CMAP Offset
|}
Depending on the mapping method the next bytes are read like so:
Direct:
IndexOffset = read uint16
Table:
IndexTable = read uint16 array (CodeEnd - CodeBegin + 1)
Scan:
Number of Scan Entries = read uint16
for every scan entry: read uint16 & read uint16