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[[Category:Software]]<noinclude>[[Category:Main]]</noinclude>
[[Category:Software]]<noinclude>[[Category:Main]]</noinclude>
<div style="float:right">[[File:Texture-Icon-BB.JPG|100px|thumb|left|Standard test image widely used]]</div>


<div style="color: #ffffff; background-color: #475854; border: 1px solid #808000; padding: 5px; {{box-shadow|4px|4px|8px|#b0b090}}">
<div style="color: #ffffff; background-color: #475854; border: 1px solid #808000; padding: 5px; {{box-shadow|4px|4px|8px|#b0b090}}">
GXT is a file format (used on PS Vita and PSP) for storing textures. The purpose of this format is to use it in the runtime without any additional formatting of the data.  
Gxt is a container for storing one or multiple graphic textures for the PSVita and PSP.
</div>
</div>
== Features ==
*Memory ready format
*Supports multiple textures in one file
*Supports compressed, swizzled, and linear texture layouts
*Supports mipmaps
*Suports palettized textures


== File format ==
== File format ==
The GXT (.gxt) format consists of:
The GXT (.gxt) format consists of:


{| class="wikitable" style="text-align: center;"
Header (for single texture):
|-
! style="background-color:#475854; color:#FFFFFF;" |'''File Layout'''
|-
| style="background-color:lightblue; color:#000000;" |'''GXT Header'''
|-
| style="background-color:lightblue; color:#000000;" |'''GXT Specification Texture 1 info'''
|-
| style="background-color:lightblue; color:#000000;" |'''GXT Specification Texture 2 info'''
|-
| style="background-color:lightblue; color:#000000;" |'''...'''
|-
| style="background-color:lightblue; color:#000000;" |'''Texture 1'''
|-
| style="background-color:lightblue; color:#000000;" |'''Padding'''
|-
| style="background-color:lightblue; color:#000000;" |'''Texture 2'''
|-
| style="background-color:lightblue; color:#000000;" |'''...'''
|-
| style="background-color:lightblue; color:#000000;" |'''Palette P4'''
|-
| style="background-color:lightblue; color:#000000;" |'''Palette P8'''
|-
|}
 
*For a single texture:


{| class="wikitable" style="text-align: center;"
{| class="wikitable" style="text-align: center;"
Line 58: Line 22:
| 0x00 || 0x04 || 47 58 54 00 || "GXT " || Magic
| 0x00 || 0x04 || 47 58 54 00 || "GXT " || Magic
|-
|-
| 0x04 || 0x04 || 03 00 00 10 || 3.01 || Version
| 0x04 || 0x04 || 03 00 00 10 || || Version
|-
| 0x08 || 0x04 || 01 00 00 00 || 1 || Number of textures embedded
|-
| 0x0C || 0x04 || 40 00 00 00 || 0x40 || Offset of the texture data/ header size
|-
| 0x10 || 0x04 || 00 00 02 00 || 0x20000 || Total size of the Textures
|-
| 0x14 || 0x04 || 00 00 00 00 || 0 || Number of 16 entry palettes (P4)
|-
| 0x18 || 0x04 || 00 00 00 00 || 0 || Number of 256 entry palettes (P8)
|-
| 0x1C || 0x04 || 00 00 00 00 || 0 || Padding
|-
|colspan="5" style="text-align:center; background-color:lightblue;" | <span style="color:black;">GXT specification per texture</span>
|-
| 0x20 || 0x04 || 40 00 00 00 || 0x40 || Offset of the single texture data
|-
| 0x24 || 0x04 || 00 00 02 00 || 0x20000 || Size of the single texture data.
|-
| 0x28 || 0x04 || FF FF FF FF || - || Index of the palette
|-
|-
| 0x2C || 0x04 || 00 00 00 00 || - || Texture flags/Not used?
| 0x08 || 0x04 || 01 00 00 00 || 40 || Number of textures embedded
|-
|-
| 0x30 || 0x04 || 00 00 00 00 || - || Texture Type
| 0x0C || 0x04 || 40 00 00 00 || 40 || Offset of the texture data
|-
|-
| 0x34 || 0x04 || 00 00 00 85 || 0x85000000 (DXT1) || Texture Base Format
| 0x10 || 0x04 || 00 00 00 80 || || Number of 16 entry palettes
|-
|-
| 0x38 || 0x02  || 00 02 || 0x200 (512) || Width
| 0x14 || 0x04 || 00 00 00 00 || || Number of 256 entry palettes
|-
|-
| 0x3A || 0x02  || 00 02 || 0x200 (512) || Height
| 0x18 || 0x08 || 00 ... 00  || 00 || Padding
|-
|-
| 0x3C || 0x02 || - || - || Mipmaps
|colspan="5" style="text-align:center; background-color:lightblue;" | <span style="color:black;">GXT specification</span>
|-
|-
| 0x3E || 0x02 || - || - || Not Used?/Padding
| 0x20 || 0x04  || 40 00 00 00 || 40 || Offset to the texture data relative to the start of the file
|-
|-
|}
|}
=== Texture type ===
{| class="wikitable" style="text-align: center;"
|-
| style="background-color:#475854; color:#FFFFFF;" |'''Name'''
| style="background-color:#475854; color:#FFFFFF;" |'''Value (h)'''
| style="background-color:#475854; color:#FFFFFF;" |'''Description'''
|-
|colspan="5" style="text-align:center; background-color:lightblue;" | <span style="color:black;">Texture Type</span>
|-
| SWIZZLED || 0x00 ||
|-
| CUBE || 0x40 ||
|-
| LINEAR || 0x60 ||
|-
| TILED || 0x80 ||
|-
| LINEAR STRIDED || 0x0C ||
|-
|}
=== Texture Base Format ===
{| class="wikitable" style="text-align: center;"
|-
| style="background-color:#475854; color:#FFFFFF;" |'''Name'''
| style="background-color:#475854; color:#FFFFFF;" |'''Value (h)'''
| style="background-color:#475854; color:#FFFFFF;" |'''Description'''
|-
|colspan="5" style="text-align:center; background-color:lightblue;" | <span style="color:black;">Texture Base Format</span>
|-
| PVRT2BPP || 00 00 00 80 || PVR 2 bits per pixel mode
|-
| PVRT4BPP || 00 00 00 81 || PVR 4 bits per pixel mode
|-
| PVRTII2BPP || 00 00 00 82 || PVR II 2 bits per pixel mode
|-
| PVRTII4BPP || 00 00 00 83 || PVR II  4 bits per pixel mode
|-
| UBC1 || 00 00 00 85 || DXT1 4 bits per pixel, no alpha
|-
| UBC2 || 00 00 00 86 || DXT3 8 bits per pixel
|-
| UBC3 || 00 00 00 87 || DXT5 8 bits per pixel
|-
| || 10 00 04 00 || 1555
|-
| || 00 00 00 10 || ARGB4444
|-
| || 00 10 00 0C || ARGB8888
|-
| || 00 50 00 0C || XRGB888
|-
| || 00 10 00 98 || RGB888
|-
| || 00 10 00 05 || RGB565
|-
| || 00 50 00 04 || RGB555
|-
| || 00 10 00 02 || RGB4444
|-
|}
*[[PVR|PVR file format]]
*[[DXT|DXT file format]]
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