Intent to Ship: WebGPU: read-write storage textures
Corentin Wallez
Contact emails
cwa...@google.comExplainer
NoneSpecification
https://gpuweb.github.io/gpuweb/#dom-gpustoragetextureaccess-read-writeSummary
Functionality added to the WebGPU/WGSL spec after its first shipment in a browser. Adds support for (read-only and) read-write storage textures which allow more general access to texture memory for GPU computation and can unlock more advanced graphical algorithms. This feature has been request by developers very often.
Blink component
Blink>WebGPUTAG review
NoneTAG review status
Not applicableRisks
Interoperability and Compatibility
Read-write storage textures have not yet been implemented in any browser, but have been approved by the GPU for the Web Community Group, with representatives from Chrome, Firefox, and Safari.
Gecko: No signal (https://github.com/mozilla/standards-positions/issues/948)
WebKit: Positive (https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933) Note that this is a blanket approval from Safari for additions to the v1 WebGPU/WGSL spec.
Web developers: Strongly positive One of the most requested additional features for WebGPU.
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 at the moment, WebGPU currently does not ship on Android WebView.
Debuggability
None
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
NoAll platforms will eventually have support. Will immediately be available on Android, 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?
YesWebGPU/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. Note that tests are still being written, but the feature will not be launched until it is fully tested.
Flag name on chrome://flags
NoneFinch feature name
NoneNon-finch justification
NoneRequires code in //chrome?
FalseTracking bug
https://bugs.chromium.org/p/dawn/issues/detail?id=1972Availability expectation
Feature is available only in Chromium browsers for the near future, on the order of months. Other browsers intend to ship WebGPU support, but don't have specified timelines.Non-OSS dependencies
Does the feature depend on any code or APIs outside the Chromium open source repository and its open-source dependencies to function?
NoEstimated milestones
No milestones specified
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).
NoneLink to entry on the Chrome Platform Status
https://chromestatus.com/feature/6469283075063808
Yoav Weiss
Contact emails
cwa...@google.comExplainer
NoneSpecification
https://gpuweb.github.io/gpuweb/#dom-gpustoragetextureaccess-read-write
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François Beaufort
On Fri, Jan 5, 2024, 14:19 Corentin Wallez <cwa...@chromium.org> wrote:Contact emails
cwa...@google.comExplainer
NoneSpecification
https://gpuweb.github.io/gpuweb/#dom-gpustoragetextureaccess-read-writeIs there a way for developers to feature detect support for this extra value?
if (navigator.gpu.wgslLanguageFeatures.has("readonly_and_readwrite_storage_textures")) {
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Chris Harrelson
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Mike Taylor
LGTM2
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