[gdal-dev] Proposed new driver to handle Basis Universal / KTX2 textures

[Even Rouault]

Jean-Roc,

those formats have potential to be loaded on the GPU with very few 
processing, as far as I understand their description. And the 
BinomialLLC/basis_universal code is able to do that typically.

That said in a GDAL context, full decompression/compression will be done 
as there's no direct interface between GDAL and the GPU. The use case 
here is more to use GDAL's convenient generic raster capabilities to 
read/write that format amongst other textures formats (which don't hold 
georefencing by themselves, but may be associated to georeferenced 
objects externally), regular non-georeferenced images ... and sometimes 
geospatial raster formats.

Even

Le 16/06/2022 à 20:46, Jean-Roc Morreale (ml) a écrit :
> Hi Even,
>
> Out of curiosity, what are the possible usecases for geospatial tasks,
> georeferenced normal/displacement mapping straight to the gpu ?
>
> regards,
> JR
>
> Le mercredi 15 juin 2022 à 16:51 +0200, Even Rouault a écrit :
>> Hi,
>>
>> There's interest for adding a new read/write raster GDAL driver for
>> the
>> Basis Universal and KTX2
>> (https://github.khronos.org/KTX-Specification/)
>> texture formats, used in 3D/BIM formats like I3S and glTF. That would
>> use the https://github.com/BinomialLLC/basis_universal software
>> (Apache
>> 2.0 licensed) to do the encoding/decoding.
>>
>> I just wanted to know if people were comfortable to have this as a
>> in-tree (optional) GDAL driver. Texture support is not necessarily
>> where
>> GDAL is most known but we do already have a few drivers specifically
>> handling that like the DDS/crunch one
>> (https://gdal.org/drivers/raster/dds.html) or the TARGA one
>> (https://gdal.org/drivers/raster/tga.html), not mentioning more
>> generic
>> purposes formats like JPEG or PNG.
>>
>> Even
>>
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