Wexos: Imported from avsys wiki

2024-05-01T17:20:31Z

Imported from avsys wiki

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'''BTI''' is an image format. It is used a lot in [[Mario Kart: Double Dash!!]], but also appears in other games such as [[Mario Kart Wii]]. A BTI file can only contain one texture, with mipmaps, which makes the format very simple.

= File Format =
The file byte order is always big endian.

{| class="wikitable"
|-
! Offset !! Type !! Description
|-
| 0x00 || Byte || '''[[GameCube and Wii Image Formats|Image format]]'''. The pixel data type is determined by this value.
|-
| 0x01 || Byte || '''Alpha enabled'''. 0 disables alpha, anything else enables it.
|-
| 0x02 || UInt16 || '''Width of image''' in pixels.
|-
| 0x04 || UInt16 || '''Height of image''' in pixels.
|-
| 0x06 || Byte || '''Wrap S'''. 0 = Clamp, 1 = Repeat, 2 = Mirror
|-
| 0x07 || Byte || '''Wrap T''', same enum as above.
|-
| 0x08 || Byte || '''Has palette'''.
|-
| 0x09 || Byte || '''[[GameCube and Wii Image Formats|Palette format]]'''.
|-
| 0x0A || UInt16 || '''Number of palette entries'''. Each consist of a color of the type specified by the palette format.
|-
| 0x0C || UInt32 || '''Palette offset'''. Offset to the palette colors.
|-
| 0x10 || Byte || '''Enable mipmaps'''.
|-
| 0x11 || Byte || '''Enable edge LOD'''.
|-
| 0x12 || Byte || '''Clamp bias'''.
|-
| 0x13 || Byte || '''Max anisotropy'''.
|-
| 0x14 || Byte || '''Minification filter'''. 0 = Nearest, 1 = Linear
|-
| 0x15 || Byte || '''Magnification filter'''.
{| class="wikitable"
|-
! Value !! Type
|-
| 0 || Nearest
|-
| 1 || Linear
|-
| 2 || Nearest_Mipmap_Nearest
|-
| 3 || Linear_Mipmap_Nearest
|-
| 4 || Nearest_Mipmap_Linear
|-
| 5 || Linear_Mipmap_Linear
|}
|-
| 0x16 || Byte || '''Min LOD''', multiplied by 8.
|-
| 0x17 || Byte || '''Max LOD''', multiplied by 8.
|-
| 0x18 || Byte || '''Total number of images''', including the main level image.
|-
| 0x19 || Byte || {{Unknown-left|'''Unknown'''.}}
|-
| 0x1A || Int16 || '''LOD bias''', multiplied by 100.
|-
| 0x1C || UInt32 || '''Image data offset'''. Offset to the data of the first image. The mipmaps are stored directly after the end of the first image.
|}

= Tools =
The following tools can handle BTI files:
* [[CTools Pack]], by [[Chadderz]]
* [[SZS Modifier]], by [[Chadderz]]
* [[Wexos's Toolbox]], by [[Wexos]]
* [[Wiimms SZS Tools]], by [[Wiimm]]

[[Category:GameCube File Formats]]
[[Category:Wii File Formats]]

BTI (File Format) - Revision history

Wexos: Imported from avsys wiki