LGTM2
/Daniel
On 2025-04-02 18:08, Alex Russell wrote:
LGTM1, but would be good to see the other review sections started.
On Wednesday, April 2, 2025 at 1:15:47 AM UTC-7 fbea...@google.com wrote:
Contact emails
fbeauf...@google.com <mailto:fbeauf...@google.com>
Explainer
To simplify the copy of entire buffers, a new overload has been
added to the GPUCommandEncoder copyBufferToBuffer() method,
allowing developers to omit offsets and size parameters.
https://github.com/gpuweb/gpuweb/pull/5098
<https://github.com/gpuweb/gpuweb/pull/5098>
Specification
https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-copybuffertobuffer
<https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-copybuffertobuffer>
Summary
Functionality added to the WebGPU spec after its first shipment in
a browser.
The GPUCommandEncoder copyBufferToBuffer() method now includes a
simpler way to copy entire buffers using a new overload with
optional offsets and size parameters.
Blink component
Blink>WebGPU
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWebGPU>
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
This feature has not yet been implemented in any browser. It has
been approved by the GPU for the Web Community Group, with
representatives from Chrome, Firefox, and Safari. See minutes at
https://github.com/gpuweb/gpuweb/wiki/GPU-Web-2025-03-19#make-the-last-2-arguments-to-copybuffertobuffer-optional-4807
<https://github.com/gpuweb/gpuweb/wiki/GPU-Web-2025-03-19#make-the-last-2-arguments-to-copybuffertobuffer-optional-4807>
Gecko: No signal (Mozilla members have requested during weekly
standardization meetings that we postpone filing standard
positions until we reach Candidate Recommendation (CR) status in Q4.)
WebKit: Positive
(https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933
<https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933>)
Web developers: Positive
(https://github.com/gpuweb/gpuweb/issues/4807
<https://github.com/gpuweb/gpuweb/issues/4807>)
Other signals:
WebView application risks
Does this intent deprecate or change behavior of existing APIs,
such that it has potentially high risk for Android WebView-based
applications?
None
Debuggability
None
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
No
All platforms will eventually have support. Will immediately be
available on Android, Android WebView, ChromeOS, Mac, and Windows,
since those platforms already support WebGPU. Linux is planned to
have WebGPU support in the future, so this feature will become
available when WebGPU does.
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
WebGPU/WGSL have a conformance test suite
(https://github.com/gpuweb/cts <https://github.com/gpuweb/cts>)
that is regularly pulled into Chromium and part of the testing of
Dawn/Tint in Chromium. While the CTS can be embedded in WPT, the
WebGPU team opted to keep it separate in Chromium testing to use a
customized harness for robustness and performance. All the tests
about this feature in WebGPU CTS can be found through the below link:
https://github.com/gpuweb/cts/pull/4310
<https://github.com/gpuweb/cts/pull/4310>
Flag name on chrome://flags
Experimental Web Platform Features
Finch feature name
WebGPUCopyBufferToBufferOverload
Requires code in //chrome?
False
Tracking bug
https://issues.chromium.org/issues/405883444
<https://issues.chromium.org/issues/405883444>
Estimated milestones
DevTrial on desktop
136
DevTrial on Android
136
Anticipated spec changes
Open questions about a feature may be a source of future web
compat or interop issues. Please list open issues (e.g. links to
known github issues in the project for the feature specification)
whose resolution may introduce web compat/interop risk (e.g.,
changing to naming or structure of the API in a
non-backward-compatible way).
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5172397000622080?gate=5107250466914304
<https://chromestatus.com/feature/5172397000622080?gate=5107250466914304>
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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