| Latest revision |
Your text |
| Line 1: |
Line 1: |
| − | '''BTI''' is an image file format similar to [[TEX0]], [[TPL]] and [[BREFT]] file formats. The only difference is the file header.
| + | A form of 2d data the can be opened in gcft |
| − | | + | {{Credits|Gamecubing8619}} |
| − | __TOC__
| |
| − | | |
| − | == File Format ==
| |
| − | The file format is very simple and starts with a file header followed by the image data. All data is written in [[big endian]].
| |
| − | | |
| − | === File Header ===
| |
| − | The following table shows the file header. It is 0x20 bytes long. There is no magic to identify BTI files,
| |
| − | so tools may do some plausibility checks to identify them.
| |
| − | | |
| − | {| class="wikitable"
| |
| − | |+ File Header
| |
| − | |-
| |
| − | ! Offset !! Type !! Description
| |
| − | |-
| |
| − | | 0x00 || Byte || '''[[Image Formats|Image format]]'''.
| |
| − | |-
| |
| − | | 0x01 || Byte || '''Enable alpha''' (0x00 means alpha is disabled, anything higher means alpha is enabled).
| |
| − | |-
| |
| − | | 0x02 || UInt16 || '''Width''' of the image in pixels.
| |
| − | |-
| |
| − | | 0x04 || UInt16 || '''Height''' of the image in pixels.
| |
| − | |-
| |
| − | | 0x06 || Byte || '''Wrap S'''[http://www.amnoid.de/gc/bti.txt] (0x01 for posteffect.bti, 0x00 for others). Probably repeat, clamp or mirror wraps for U projection maps.
| |
| − | |-
| |
| − | | 0x07 || Byte || '''Wrap T'''[http://www.amnoid.de/gc/bti.txt] (0x01 for posteffect.bti, 0x00 for others). Probably repeat, clamp or mirror wraps for V projection maps.
| |
| − | |-
| |
| − | | 0x08 || UInt16 || '''[[Image Formats#Palette_Formats|Palette format]]''' (not used in [[Mario Kart Wii]]).
| |
| − | |-
| |
| − | | 0x0A || UInt16 || '''Number of palette entries'''.
| |
| − | |-
| |
| − | | 0x0C || UInt32 || '''Offset to [[#Image and Palette Data|palette data]]''', relative to the start of the file header.
| |
| − | |-
| |
| − | | 0x10 || UInt32 || {{Unknown-left|'''Unknown'''.}} Always 0 in [[Mario Kart Wii]].
| |
| − | |-
| |
| − | | 0x14 || Byte || '''Magnification filter type''' (0x00 means nearest, 0x01 means linear).
| |
| − | |-
| |
| − | | 0x15 || Byte || '''Minification filter type'''.
| |
| − | |-
| |
| − | | 0x16 || UInt16 || {{Unknown-left|'''Unknown'''.}} Always 0 in [[Mario Kart Wii]].
| |
| − | |-
| |
| − | | 0x18 || Byte || '''Total number of images''', thus number of mipmaps + 1.
| |
| − | |-
| |
| − | | 0x19 || Byte || {{Unknown-left|'''Unknown'''.}} Always 0 in [[Mario Kart Wii]].
| |
| − | |-
| |
| − | | 0x1A || UInt16 || {{Unknown-left|'''Unknown'''.}} Always 0 in [[Mario Kart Wii]].
| |
| − | |-
| |
| − | | 0x1C || UInt32 || '''Offset to [[#Image and Palette Data|image data]]''', relative to the start of the file header.
| |
| − | |-
| |
| − | | 0x20 || colspan=2 {{unknown|End of file header}}
| |
| − | |}
| |
| − | | |
| − | === Image and Palette Data ===
| |
| − | The image and palette data starts at the given data offset in the file header.
| |
| − | The data depends on the image and palette formats format.
| |
| − | The image format values are listed below.
| |
| − | | |
| − | {{Credits|Gamecubing8619,Vulcan,wiki.tockdom.com}} | |
