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

[John Carlson]

Perhaps they are referring to Pixar’s Universal (scene) format

On Wed, Aug 14, 2019 at 5:44 PM Brutzman, Donald (Don) (CIV) <
brutzman at nps.edu> 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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> > x3d-public at web3d.org
> > http://web3d.org/mailman/listinfo/x3d-public_web3d.org
> >
>
>
> 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
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