Adds a new feature flag, `EXTERNAL_TEXTURE`, indicating device support
for our implementation of WebGPU's `GPUExternalTexture` [1] which will
land in upcoming patches. Conceptually this would make more sense as a
downlevel flag, as it is a core part of the WebGPU spec which we do not
yet support. We do not want, however, to cause applications to reject
adapters because we have not finished implementing this, so for now we
are making it an opt-in feature.
As an initial step towards supporting this feature, this patch adds a
new `BindingType` corresponding to WebGPU's
`GPUExternalTextureBindingLayout` [2]. This binding type dictates that
when creating a bind group the corresponding entry must be either an
external texture or a texture view with certain additional requirements
[3].
As of yet wgpu has no concept of an external texture (that will follow
in later patches) but for now this patch ensures that texture views
corresponding to an external texture binding type are validated
correctly. Note that as the feature flag is not yet supported on any
real backends, bind group layout creation will fail before getting the
chance to attempt to create a bind group. But in the added tests using
the noop backend we can see this validation taking place.
[1] https://www.w3.org/TR/webgpu/#gpuexternaltexture
[1] https://www.w3.org/TR/webgpu/#dictdef-gpuexternaltexturebindinglayout
[2] https://gpuweb.github.io/gpuweb/#bind-group-creation
* Make wgpu-core's copy_buffer_to_buffer `size` parameter optional
* Make the copy size optional in more places
* Fix for webgpu backend
* [deno_webgpu] Support additional copyBufferToBuffer signatures
* Add changelog entry
* Add copyBufferToBuffer tests to CTS test list
(This doesn't actually enable the tests for the new overloads, because
of a different error reporting issue that affects many CTS tests
including these. But if you run the tests for the new overloads
manually, before and after the fix, you can see that the behavior has
changed.)
* Reproducible formula for vendoring modified webgpu-sys
Commit the updated vendor command in all the files for consistency.
