Contact [email protected]

ExplainerNone

Specificationhttps://github.com/gpuweb/gpuweb/pull/4951

Summary

Adds additional vertex formats not present in the initial release of WebGPU
due to lack of support or old macOS versions (which are no longer supported
by any browser). The 1-component vertex formats lets applications request
only the necessary data when previously they had to request at least 2x
more for 8 and 16-bit data types. The unorm8x4-bgra format makes it
slightly more convenient to load BGRA-encoded vertex colors while keeping
the same shader.


Blink componentBlink>WebGPU
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWebGPU>

TAG reviewNone

TAG review statusNot applicable

Risks


Interoperability and Compatibility

This feature has been approved in W3C GPU for the Web WG meetings including
participants from Safari and Firefox.
https://github.com/gpuweb/gpuweb/issues/4549#issuecomment-2044859355


*Gecko*: No signal Mozilla members have approved <link to the PR, or
tracking issue> and requested during weekly standardization meetings that
we postpone filing standard positions until we reach Candidate
Recommendation (CR) status in Q4.

*WebKit*: Closed Without a Position (
https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933
)

*Web developers*: Positive (
https://x.com/SebAaltonen/status/1856361670437646622)

*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


Goals for experimentation



Ongoing technical constraints

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, where hardware
support is available. 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)
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. https://github.com/gpuweb/cts/pull/4029


Flag name on about://flagsNone

Finch feature nameWebGPUOneComponentVertexFormats

Requires code in //chrome?False

Tracking bughttps://issues.chromium.org/issues/376924407

Estimated milestones

No milestones specified


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/4609840973086720

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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