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KTXLoader quirks and ASTC support

See original GitHub issue

I’m delighted to see built-in compressed texture support in 6.0.0, big thanks!

Using KTXLoader I noticed that:

After load the resource.texture field is not populated which breaks atlases (but is fixable with loader middleware)
mipmaps are not being used, even if they are present. I suppose this line is at the root of this: https://github.com/pixijs/pixi.js/blob/dev/packages/compressed-textures/src/loaders/registerCompressedTextures.ts#L25

MipMaps were lost on BASIS as well, but I suppose that’s a different issue. (Sadly the transcoder is too heavy for us)

Additionally, I’d love to see ASTC support, since it’s quite widely available and has good tooling around it.

Let me know if there’s anything I can help you with.

Environment

pixi.js version: 6.0.0

Issue Analytics

State:
Created 2 years ago
Comments:14 (9 by maintainers)

Top GitHub Comments

3reactions

bigtimebuddycommented, Mar 31, 2021

There are a few issues here and I just want to clarify a little:

LoaderResource is not getting populated with texture object
KTX mipmaps are not being used even if available
BASIS mipmaps are not being used even if available
Feature request for ASTC support

My PR fixes the first issue. Will need help with the other issues here.

1reaction

hdemmercommented, Apr 5, 2021

@SukantPal Enabling MipMaps works like a charm and allows me to ship 🚢 Thanks! ✨ The KTX format allows to specify only a subset of mip levels, so I see where this can go wrong… Especially with Pixi’s 2D focus leaving mips off by default is probably the better solution for now. Maybe we can document this somewhere? About that ASTC support, is there anything I can do to help with? It’s supported on modern Apple devices and quality-wise beats PVRTC by a mile.

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