Tex1 - TexSet¶

Applies to: GT3, GT4 · Extension: .img / none · Endian: Little

The Tex1 is a texture format that can hold multiple formats. It is essentially a wrapper around the PS2 Tex registers.

The header may be present in all sorts of files like models.

Size: 0x30

Field	Offset	Type	Description
`Tex1`	`0x00`	`Int`	Magic, (Enforced only in debug?)
Relocation Pointer	`0x04`	`Int`	Relocation Pointer
Unknown Pointer	`0x08`	`Int`	Normally 0?
File Size	`0x0C`	`Int`	File Size
Base TBP Offset	`0x10`	`short`	Remapped at runtime. TBP register base
Total Blocks	`0x12`	`short`	Total blocks taken by all textures in this texture set
PGLUTexture Count	`0x14`	`short`	Number of textures (or mipmaps) in this texture set
Texture Buffer Count	`0x16`	`short`	Number of texture buffers in this texture set
PGLUTextures Pointer	`0x18`	`PGLUTexture*`	Pointer to PGLUTexture infos
Texture Buffer Info Pointer	`0xC`	`TextureBufferInfo*`	Pointer to texture buffer info
Unknown Pointer	`0x20`	`void*`	N/A
Clut Animation Pointer	`0x24`	`void*`	Unknown. Remapped by `pgluMapClutAnimation`
Unknown Pointer	`0x28`	`void*`	N/A

Size: 0x28

Direct GS Registers go here:

Normally there is one for the image and one for the palette if applicable.

For tightly packed texture sets for things like car textures, there can be many of them.

Size: 0x0C

Field	Offset	Type	Description
Image Data Pointer	`0x00`	`void*`	Pointer to the image data.
TBP	`0x04`	`short`	Block offset of the image data.
Buffer Width	`0x06`	`byte`	Buffer width of the texture buffer.
PSM	`0x07`	`byte`	Pixel surface format.
Width	`0x08`	`byte`	Width of the texture buffer.
Height	`0x0A`	`byte`	Height of the texture buffer.

Texture Blocks¶

Refer to the PS2 GS's Users Manual - Page 161 to 170.

Last update: September 22, 2023
Created: September 22, 2023