KTX Image: Difference between revisions
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== KTX == | == KTX, KTX2 == | ||
* ''' Format Type ''': Image <br> | * ''' Format Type ''': Image <br> | ||
* ''' [http://en.wikipedia.org/wiki/Endianness Endian Order] ''': Little Endian or Big Endian<br> | * ''' [http://en.wikipedia.org/wiki/Endianness Endian Order] ''': Little Endian or Big Endian<br> | ||
* ''' Signatures ''': KTX 11 / KTX 20 <br> | |||
=== Format Specifications (KTX v1.1) === | === Format Specifications (KTX v1.1) === | ||
KTX v1.1 file format is no longer used in newer games. It was replaced by KTX v2.0. | |||
<div class="toccolours mw-collapsible" id="mw-customcollapsible-myDivision" style="width:800px; overflow:auto;"> | <div class="toccolours mw-collapsible" id="mw-customcollapsible-myDivision" style="width:800px; overflow:auto;"> | ||
<pre> | <pre> | ||
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Full file format description can be found in official documentation [https://github.khronos.org/KTX-Specification/ here]. | Full file format description can be found in official documentation [https://github.khronos.org/KTX-Specification/ here]. | ||
=== | === Notes and Comments === | ||
None. | |||
=== Games === | |||
List of games using this file format: | |||
* Lord of the Rings: Rise of War | |||
* Miniverse | |||
=== Compatible Programs === | === Compatible Programs === | ||
* [https://github.com/BinomialLLC/crunch crunch] | * [https://github.com/BinomialLLC/crunch crunch] | ||
* GIMP + [https://github.com/chriku/gimp-ktx gimp-ktx plugin] | |||
* [https://github.com/kopaka1822/ImageViewer Image Viewer and Tonemapper] (can view KTX/KTX2 files) | |||
* [https://github.com/alecazam/kram Kram] (can view KTX/KTX2 files) | |||
* [https://github.com/KhronosGroup/KTX-Software KTX-Software] (official tools to create KTX/KTX2 files) | |||
* [http://pixelandpolygon.com/picopixel-download PicoPixel] (can view KTX files) | |||
* PVRTexTool | |||
=== See Also === | |||
* [https://github.com/KhronosGroup/KTX-Specification KTX-Specification] (official KTX file format repository on Github) | |||
* [https://web.archive.org/web/20140219231709/https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/ KTX 1.1 file format] | |||
* [https://github.com/KhronosGroup/KTX-Software/wiki KTX Software Wiki] | |||
=== Gallery === | |||
<gallery bordercolor="transparent" spacing="small" orientation="landscape"> | |||
ktx_picopixel.png|KTX file opened in PicoPixel | |||
</gallery> | |||
<br/><br> | <br/><br> | ||
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[[Category:Format_Image | Type: Image]] | [[Category:Format_Image | Type: Image]] | ||
[[Category:Extension_ktx | Extension: ktx]] | [[Category:Extension_ktx | Extension: ktx]] | ||
[[Category:Extension_ktx2 | Extension: ktx2]] | |||
[[Category:BMS_None | BMS: None]] | [[Category:BMS_None | BMS: None]] | ||
[[Category:File Format]] | [[Category:File Format]] | ||
Latest revision as of 20:54, 28 September 2022
KTX, KTX2
- Format Type : Image
- Endian Order : Little Endian or Big Endian
- Signatures : KTX 11 / KTX 20
Format Specifications (KTX v1.1)
KTX v1.1 file format is no longer used in newer games. It was replaced by KTX v2.0.
// KTX 1.1 texture
// Khronos Texture file format
// header (64 bytes)
12 bytes - magic // "AB 4B 54 58 20 31 31 BB 0D 0A 1A 0A" (KTX 11)
4 bytes (uint32) - endianess // "01 02 03 04" - little endian
// "04 03 02 01" - big endian
4 bytes (uint32) - gl type // can be "0"
4 bytes (uint32) - type size // "1"
4 bytes (uint32) - gl format // "0"
4 bytes (uint32) - gl internal format
4 bytes (uint32) - gl base internal format
4 bytes (uint32) - pixel width
4 bytes (uint32) - pixel height
4 bytes (uint32) - pixel depth
4 bytes (uint32) - number of array elements
4 bytes (uint32) - number of faces
4 bytes (uint32) - number of mipmap levels
4 bytes (uint32) - size of key value data
// key and value data
num_of_key_value_entries *
{
4 bytes (uint32) - size of key value entry
x bytes - key value entry // e.g. "KTXorientation.S=r,T=d,R=i"
x bytes - padding
}
num_of_mipmap_levels *
{
4 bytes (uint32) - image data size
x bytes - image data
}
x bytes - padding
Full file format description can be found in official documentation here.
Format Specifications (KTX v2.0)
// KTX 2.0 texture
// Khronos Texture file format
// header
12 bytes - magic // "AB 4B 54 58 20 32 30 BB 0D 0A 1A 0A" (KTX 20)
4 bytes (uint32) - vulkan format
4 bytes (uint32) - type size
4 bytes (uint32) - pixel width
4 bytes (uint32) - pixel height
4 bytes (uint32) - pixel depth
4 bytes (uint32) - layer count
4 bytes (uint32) - face count
4 bytes (uint32) - level count
4 bytes (uint32) - super compression scheme
// index
4 bytes (uint32) - dfd byte offset
4 bytes (uint32) - dfd byte length
4 bytes (uint32) - kvd byte offset
8 bytes (uint64) - sgd byte offset
8 bytes (uint64) - sgd byte length
// level index
num_of_levels *
{
8 bytes (uint64) - byte offset
8 bytes (uint64) - byte length
8 bytes (uint64) - uncompressed byte length
}
// data format descriptor
4 bytes (uint32) - dfd total size
x bytes - dfd block
// key value data
4 bytes (uint32) - key and value byte length
x bytes - key and value data
x bytes - padding
// super compression global data
x bytes - super compression data
// image data
x bytes - data
Full file format description can be found in official documentation here.
Notes and Comments
None.
Games
List of games using this file format:
- Lord of the Rings: Rise of War
- Miniverse
Compatible Programs
- crunch
- GIMP + gimp-ktx plugin
- Image Viewer and Tonemapper (can view KTX/KTX2 files)
- Kram (can view KTX/KTX2 files)
- KTX-Software (official tools to create KTX/KTX2 files)
- PicoPixel (can view KTX files)
- PVRTexTool
See Also
- KTX-Specification (official KTX file format repository on Github)
- KTX 1.1 file format
- KTX Software Wiki
Gallery
-
KTX file opened in PicoPixel
