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TXS3 - TextureSet3

Applies to: GT5, GTPSP, GT6, GT Sport, GT7 · Extension: .img, .txs, .tex, none · Endian: Platform Dependent

TXS3 is an evolution of the Tex1 format that GT3 and GT4 uses. It now allows being linked to a "streaming" texture file, which holds compressed textures to be streamed - mostly used for courses.

The 3 in TextureSet3 represents PS3.

Converting from/to TXS3

Refer to Image Editing.

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

Note that the header varies between PS3-era Gran Turismos and PS4-era, pointers are 64 bit instead of 32 bit.

Size: 0x40

Field Offset Type Description
TXS3 or 3SXT 0x00 Int Magic, (Enforced, cannot be different), depends on endian (Little will be 3SXT)
File Size 0x04 Int File Size
Relocation Pointer 0x08 Int Relocation Pointer
Unknown 0x0C Int N/A
Unknown 0x10 Int Sometimes 1
PGLUTextureInfo Count 0x14 short Number of platform-specific texture parameters.
Image Info Count 0x16 short Number of image infos.
PGLUTextureInfo Pointer 0x18 PGLUTextureInfo* Offset to platform-specific texture parameters.
Image Info Count 0x1C ImageInfo* Offset to image infos.
Padding 0x20 byte[0x20] N/A

PGLUTextureInfo

This depends on the platform. These are normally direct platform texture registers/parameters.

PS3 (Cell)

All of the following macros take up 1 Int.

CELL_GCM_METHOD_HEADER_TEXTURE_OFFSET
Field Bits Description
num 0-13 Number
method 14-31 Method
CELL_GCM_METHOD_DATA_TEXTURE_OFFSET
Field Bits Description
offset 0-31 Offset
CELL_GCM_METHOD_DATA_TEXTURE_BORDER_FORMAT
Field Bits Description
pad 0-7 N/A
mipmap 8-15 N/A
format 16-23 N/A
dimension 24-27 CELL_GCM_TEXTURE_DIMENSION
border 28 CELL_GCM_TEXTURE_BORDER
cubemap 29 CELL_CGM_BOOL
location 30-31 CELL_GCM_LOCATION
CELL_GCM_METHOD_DATA_TEXTURE_ADDRESS
Field Bits Description
zfunc 0-3 CELL_GCM_TEXTURE_ZFUNC_NEVER
gamma 4-11 N/A
wrap_r 12-15 CELL_GCM_TEXTURE_WRAP
unsignedRemap 16-19 CELL_GCM_TEXTURE_UNSIGNED_REMAP
wrap_t 20-23 CELL_GCM_TEXTURE_WRAP
anisoBias 24-27 N/A
wrap_s 28-31 CELL_GCM_TEXTURE_WRAP
CELL_GCM_METHOD_DATA_TEXTURE_CONTROL0_ALPHA_KILL
Field Bits Description
enable 0 CELL_GCM_FALSE
minlod 1-12 N/A
minlod 13-24 N/A
maxAniso 25-27 CELL_GCM_TEXTURE_MAX_ANIS
pad 28 N/A
alphakill 29 CELL_GCM_FALSE
pad 30-31 N/A
CELL_GCM_METHOD_DATA_TEXTURE_CONTROL1
Field Bits Description
pad 0-14 N/A
remapOrder 15 CELL_GCM_TEXTURE_REMAP_ORDER
OutB 16-17 CELL_GCM_TEXTURE_REMAP
OutG 18-19 CELL_GCM_TEXTURE_REMAP
OutR 20-21 CELL_GCM_TEXTURE_REMAP
OutA 22-23 CELL_GCM_TEXTURE_REMAP
InB 24-25 CELL_GCM_TEXTURE_REMAP
InG 26-27 CELL_GCM_TEXTURE_REMAP
InR 28-29 CELL_GCM_TEXTURE_REMAP
InA 30-31 CELL_GCM_TEXTURE_REMAP
CELL_GCM_METHOD_DATA_TEXTURE_CONTROL1
Field Bits Description
bs 0 CELL_GCM_FALSE
gs 1 CELL_GCM_FALSE
rs 2 CELL_GCM_FALSE
qs 3 CELL_GCM_FALSE
mag 4-7 CELL_GCM_TEXTURE_MAG
mag 8-11 CELL_GCM_TEXTURE_MIN
convultion 12-14 CELL_GCM_TEXTURE_CONVOLUTION
bias 15-27 N/A
CELL_GCM_METHOD_DATA_TEXTURE_IMAGE_RECT
Field Bits Description
width 0-15 N/A
height 16-31 N/A
CELL_GCM_METHOD_DATA_TEXTURE_BORDER_COLOR
Field Bits Description
borderColor 0-31 N/A
CELL_GCM_METHOD_HEADER_TEXTURE_CONTROL3
Field Bits Description
num 0-13 Number
method 14-31 Method
CELL_GCM_METHOD_DATA_TEXTURE_IMAGE_RECT
Field Bits Description
depth 0-11 N/A
pitch 12-31 N/A
CELL_GCM_METHOD_HEADER_TEXTURE_CONTROL2
Field Bits Description
0x2D 0-23 0x2D
aniso 24 CELL_GCM_TEXTURE_ANISO
iso 25 CELL_GCM_TEXTURE_ANISO
slope 26-31 N/A
Remaining Values
Field Type Description
Unknown Int ?
Unknown ID UInt ?
Texture ID UInt Image ID. Used for models.
Texture Name Pointer char* Not used, optional. Just debug info.

Image Info

Size: 0x20

Field Offset Type Description
Image Data Pointer 0x00 void* Pointer to the image data. This is empty if the data is from a side streamed file.
Image Data Size 0x04 void* Image data size. This is empty if the data is from a side streamed file.
Unknown 0x08 byte ?
Image Format 0x09 ImageFormat Format of the image.
Mipmap Count 0x0A byte Number of mipmaps
Unknown 0x0B byte ?
Image Width 0x0C ushort Image Width.
Image Height 0x0E ushort Image Height.
Unknown 0x10 ushort Sometimes 1.
Unknown 0x12 ushort ?
Pad 0x14 int N/A
Stream Info 0x18 TextureStreamInfo* Pointer to streamed image information. Optional.
Pad 0x1C int N/A

Texture Stream Info

These represent a texture in a streamed file, which may host multiple mipmaps for each texture. They are compressed using the inflate algorithm.

Example

sky/sky.tex streams textures from sky/sky.texstream. Course file packs may also link to a .texstream file.

Field Offset Type Description
Texture Stream Mipmap Info Pointer 0x00 TextureStreamMipmapInfo* Pointer to the image data. This is empty if the data is from a side streamed file.
Texture Stream Mipmap Info Count 0x04 Int Image data size. This is empty if the data is from a side streamed file.
Unknown 0x08 Int ?
Total Uncompressed Size 0x0C Int Uncompressed data for this texture and its mipmaps
Unknown 0x12 ushort Sometimes 1
Width 0x12 ushort Width of the texture
Height 0x14 ushort Height of the texture
Unknown 0x16 ushort Sometimes 1.
Pad 0x18 byte[0x08] N/A

Texture Stream Mipmap Info

Size: 0x10

Field Offset Type Description
Unknown 0x00 Int ?
Stream Offset 0x04 Int Offset of the data in the compressed stream .texstream.
Compressed Size 0x08 Int Compressed size of the image in the compressed stream
Uncompressed size 0x0C Int Uncompressed size of the image in the compressed stream