GLTFIO Webp Texture Support

[benn-herrera]

Webp Texture Support

• Addresses Issue 7962 (Webp Texture Support)
• This PR broken out as 3 of 3 from #9363 per request by @pixelflinger
• Preceding PRs: #9369 #9371

Changes

• cmake option FILAMENT_SUPPORTS_WEBP_TEXTURES now actually does all of the thing. defaults to OFF
• libs/gltfio
  • added WebpProvider and createOptionalWebpProvider
    • adapted from StbProvider with minimal changes (substituted webp equivalents for stbi info and decoding operations)
    • createOptionalWebpProvider() is always available regardless of FILAMENT_SUPPORTS_WEBP_TEXTURES
      • returns new texture provider when ON
      • returns nullptr when OFF
  • added handling for cgltf webp_image in places where image and basisu_image were being referenced
  • added test case for loading webp version of damaged helmet (see below)
• propagated use of createOptionalWebpProvider and registration as image/webp handler to samples
• updated jvm and javascript bindings to include optional webp texture provider
• added third_party/models/DamagedHelmet/DamagedHelmetWebp.glb
  • images converted to webp, textures updated to use EXT_texture_webp extension
  • geometry draco compressed
  • modifications done via gltf-transform CLI utility
  • used in updated gltfio_test

[benn-herrera]

Can you also add to third_party/models/DamagedHelmet/README.md to indicate how the Webp version came about?

Fixed.

[pixelflinger]

@benn-herrera we're almost there! Looks like the iOS build is failing and the PR needs a rebase.

[benn-herrera]

@benn-herrera we're almost there! Looks like the iOS build is failing and the PR needs a rebase.

on it.

EDIT: should be fixed with last commit. iOS builds for me locally.

[benn-herrera]

Fixed a couple issues that only showed up when WebP is enabled.