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Austin Eng 2f218e2b21 Implement upstream RequestDevice, add native-only CreateDevice

This CL implements RequestDevice and also has changes for
Dawn to internally use wgpu::FeatureName enums, instead of
strings. Some of the string handling is kept for now to
support the deprecated creation path. GetFeatureInfo is added
to the instance to get a name and description of the feature,
for reporting in about://gpu.

Dawn device toggles are now passed in an extension struct off
of the device descriptor. This is only supported in dawn_native,
and not dawn_wire, for now, since dawn_wire doesn't have a way
to serialize lists of null-terminated const char*.

To enable the client to check whether the toggle descriptor is
supported, a `dawn-native` feature is added which is supported
all the time with dawn_native, but not supported with dawn_wire.

Feature `dawn-native` also enables a synchronous version of
CreateDevice for convenience.

Bug: dawn:160
Change-Id: Ifc195e7ea808c6c319021528ef4b36bd65583bff
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/72020
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>

2021-12-22 19:02:23 +00:00

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Dawn Native

The dawn-native feature enables additional functionality that is supported only when the WebGPU implementation is dawn_native.

Additional functionality:

wgpu::DawnTogglesDeviceDescriptor may be chained on wgpu::DeviceDescriptor on device creation to enable Dawn-specific toggles on the device.
Synchronous adapter.CreateDevice(const wgpu::DeviceDescriptor*) may be called.

Notes:

Enabling this feature in the wgpu::DeviceDescriptor does nothing, but its presence in the Adapter's set of supported features means that the additional functionality is supported.

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Dawn Native

599 B

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