1911508 - [wpt-sync] Sync PR 47449 - Add a WPT test validating that reset after flush discards frame content

Status: RESOLVED FIXED

(Core :: Graphics: Canvas2D, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 47449 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/47449
Details from upstream follow.

Jean-Philippe Gravel <[e-mail]> wrote:

Add a WPT test validating that reset after flush discards frame content

There was already a test validating that reset clears the frame buffer
(2d.reset.basic), but that test called reset right after the draw
command, in the same frame. Implementation might behave differently if
a frame is actually rasterized before reset is called.

In particular, Chromium has an optimization that discards pending paint
ops when reset is called. Thus, in the original test, the frame buffer
was never actually written to before the reset and the test could not
verify whether reset actually clears that buffer. By forcing frame to
be rasterized, we now validate that the frame buffer is correctly
cleared.

Bug: 354124879
Change-Id: Ia6536568e2666138ffa4a22418a7c4eb14983577
Reviewed-on: https://chromium-review.googlesource.com/5746932
WPT-Export-Revision: 2bcbb72fd90583d4e8a53647680ca48275b232fa

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=bdb4a8804a94cd9c1f27de467e7171812d8461c9

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 9 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 3 tests

Status Summary

Firefox

PASS: 3

Chrome

PASS: 3

Safari

PASS: 3

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4932017b7257
[wpt PR 47449] - Add a WPT test validating that reset after flush discards frame content, a=testonly

Comment 4

[Cristina Horotan [:chorotan]]

https://hg.mozilla.org/mozilla-central/rev/4932017b7257