gltfpack: Implement support for KHR_texture_basisu inputs

zeux / meshoptimizer

Mesh optimization library that makes meshes smaller and faster to render

MIT License

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gltfpack: Implement support for KHR_texture_basisu inputs #692

Closed zeux closed 3 months ago

zeux commented 3 months ago

When the input file has KHR_texture_basisu extension, we now will preserve the images along with the extension in the output file instead of discarding it.

When -tc is specified, images like this will not be recompressed; accordingly, some flags like -tl and -tp will not work with pre-compressed inputs.

When the input textures specify both uncompressed and compressed image, the behavior is likely to be suboptimal...

Fixes #537.

zeux commented 3 months ago

TBD:

[ ] ~Automatically fix assets like AnisotropyBarnLamp: https://github.com/KhronosGroup/glTF-Sample-Assets/issues/117~ On further reflection this should be out of scope for now.
[x] Better behavior when -tc isn't used and the input file has both uncompressed and compressed textures (when -tc is used we can't really do anything meaningful...)