[x3d-public] Background static image and dds; Khronos universal texture

[Brutzman, Donald (Don) (CIV)]

For more information on Khronos universal texture, please see slides 21-22 on Khronos slideset for Web3D 2019 Conference.

Khronos Update to Web3D Los Angeles, July 2019
Neil Trevett, Khronos President and NVIDIA VP Developer Ecosystems
https://www.khronos.org/assets/uploads/developers/library/2019-web3d/Khronos-Web3D-Update_Jul19.pdf

On 8/14/2019 3:03 PM, Brutzman, Donald (Don) (CIV) wrote:
> Possibly relevant: Khronos mentioned Universal texture format several times during Web3D 2019 and SIGGRAPH.
> 
> Not finding much on Khronos website.  Recent press release:
> 
> 	Google and Binomial Contribute Basis Universal Texture Format to Khronos’ glTF 3D Transmission Open Standard
> 	https://www.khronos.org/blog/google-and-binomial-contribute-basis-universal-texture-format-to-khronos-gltf-3d-transmission-open-standard
> 
> On 8/6/2019 4:30 PM, Michalis Kamburelis wrote:
>> Andreas Plesch <andreasplesch at gmail.com> wrote:
>>> Is it your impression that KTX is already in wide use ? Googling around does not seem result in too many hits.
>>>
>>
>> Both KTX and DDS are somewhat "obscure" image formats compared to
>> widespread PNG or JPG. KTX and DDS are specialized, and offer
>> something useful for graphic developers/engines (GPU compression,
>> cubemaps, 3d textures etc.) but intentionally do not care about disk
>> size (neither offers compression heavily oriented at smaller file size
>> like PNG or JPG encoding).
>>
>> Comparing KTX only with DDS, it seems it depends on the application. I
>> used various texture compression tools (from
>> https://castle-engine.io/creating_data_auto_generated_textures.php#section_texture_compression
>> ), some support only DDS, some support only KTX, some both. So I don't
>> really have a good answer "which is more popular", I really don't know
>> :) Both seem moderately popular now.
>>
>> The reason for me advocating KTX support is because I think the future is KTX.
>>
>> - KTX has a nice specification, that cares to satisfy various APIs.
>>
>> - E.g. KTX can have bottom-up or top-down row order, so it can
>> trivially fit both OpenGL or Direct3D. This fixes one of the problems
>> with DDS --- DDS expects top-down row order (like Direct3D), so your
>> OpenGL(ES) implementation will either expect images flipped, or flip
>> them in shaders, or flip them at loading (which isn't easy for GPU
>> compressed formats).
>>
>> - KTX is backed by Khronos, which has a good track with graphic
>> standards :) I think this will encourage adoption, which in turn will
>> mean that KTX will be supported by more and more tools so we all gain
>> inter-operability.
>>
>> - KTX 2 is in-progress (
>> https://github.com/KhronosGroup/KTX-Specification/blob/master/ktxspec.adoc
>> ), so it seems alive.
>>
>>> glTF did not decide on a supported texture format (yet):
>>>
>>> https://github.com/KhronosGroup/glTF/issues/835
>>>
>>
>> I saw in that ticket a resolution:
>> https://github.com/KhronosGroup/glTF/issues/835#issuecomment-441221064
>>
>> """
>> Closing this issue, since the path forward has been set.
>> KTX2 spec (WIP): https://github.com/KhronosGroup/KTX-Specification/
>> Texture transmission tools:
>> https://github.com/KhronosGroup/glTF-Texture-Transmission-Tools/
>> """
>>
>> There's info about it on:
>> https://www.khronos.org/assets/uploads/developers/library/2018-gdc-webgl-and-gltf/glTF-Texture-Transmission-GDC_Mar18.pdf
>>    . As far as I understand, glTF will support a new format for texture
>> data, "Universal Format", to which other formats can be easily
>> converted using tools from
>> https://github.com/KhronosGroup/glTF-Texture-Transmission-Tools/ . The
>> reasoning behind this is in comments above
>> https://github.com/KhronosGroup/glTF/issues/835#issuecomment-441221064
>> , I understand that KTX fits in this pipeline well.
>>
>> Best regards,
>> Michalis
>>
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> 
> 
> all the best, Don
> 


all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman