LGTM2
On 10/17/24 8:12 AM, Alex Russell wrote:
LGTM1
On Thu, Oct 17, 2024, 5:36 PM 'François Beaufort' via blink-dev
<blink-dev@chromium.org> wrote:
Contact emails
fbeauf...@google.com <mailto:fbeauf...@google.com>
Explainer
Not all graphics cards and systems have the same capabilities when
it comes to WebGPU.
To address this, WebGPU has a GPU feature system where developers
can check if a device supports specific functionalities.
We’re introducing a new “float32-blendable” GPU feature that makes
GPU textures with formats "r32float", "rg32float", and
"rgba32float" blendable.
32-bit floating-point textures are essential for HDR rendering to
preserve a wide range of color values and prevent color banding
artifacts.
It is also useful for scientific visualization such as radio
astronomy imaging.
By exposing this capability as a GPU feature, developers can
explicitly check for "float32-blendable" support and provide
fallback solutions or alternative rendering paths when necessary.
This ensures consistent and predictable behavior across a diverse
range of WebGPU implementations.
https://github.com/gpuweb/gpuweb/pull/4896/
<https://github.com/gpuweb/gpuweb/pull/4896/>
Specification
https://www.w3.org/TR/webgpu/#float32-blendable
<https://www.w3.org/TR/webgpu/#float32-blendable>
Summary
Functionality added to the WebGPU spec after its first shipment in
a browser.
The “float32-blendable” GPU feature makes GPU textures with
formats "r32float", "rg32float", and "rgba32float" blendable.
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/Minutes-2023-04-19#support-blending-32-bit-float-textures-3556
<https://github.com/gpuweb/gpuweb/wiki/Minutes-2023-04-19#support-blending-32-bit-float-textures-3556>and
https://github.com/gpuweb/gpuweb/pull/4896
<https://github.com/gpuweb/gpuweb/pull/4896>
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/3556
<https://github.com/gpuweb/gpuweb/issues/3556>)
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/4003
<https://github.com/gpuweb/cts/pull/4003>
Flag name on chrome://flags
chrome://flags/#enable-unsafe-webgpu
Finch feature name
WebGPU.Enabled:UnsafeFeatures
Requires code in //chrome?
False
Tracking bug
https://issues.chromium.org/369649348
<https://issues.chromium.org/369649348>
Estimated milestones
DevTrial on desktop
132
DevTrial on Android
132
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/5173655901044736?gate=5129994471473152
<https://chromestatus.com/feature/5173655901044736?gate=5129994471473152>
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
--
You received this message because you are subscribed to the Google
Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPpwU5%2Bg4W0ruYJZ4-Mbg%2B4yW4vX%3DkpZJdisCg4tBsnUN%3D66%2Bw%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPpwU5%2Bg4W0ruYJZ4-Mbg%2B4yW4vX%3DkpZJdisCg4tBsnUN%3D66%2Bw%40mail.gmail.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google
Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAA44PQgVKzuQi37FEVmyJiVYVxyYb8cxos8pk9ZjTea9s%3DdW%3Dg%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAA44PQgVKzuQi37FEVmyJiVYVxyYb8cxos8pk9ZjTea9s%3DdW%3Dg%40mail.gmail.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google Groups
"blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to blink-dev+unsubscr...@chromium.org.
To view this discussion on the web visit
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/16443c59-5a5d-4818-b223-a71e21a234c7%40chromium.org.
