commit | 6e6f9fbb0746983001d7fe80ab717567c2f73bfc | [log] [tgz] |
---|---|---|
author | Jean-Philippe Gravel <jpgravel@chromium.org> | Fri Oct 20 15:01:55 2023 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Fri Oct 20 15:19:14 2023 |
tree | ac1d9c876d6a350eb6a524f3a615aa82043c2e8a | |
parent | 0d569c25cc1d7265e8eb92ead6049600edef4a1b [diff] |
Throw an exception in putImageData if canvas layers are opened This API is incompatible with how the 2D canvas is rasterized when it contains unclosed layers. Because layers can have filters that get applied on their final content, they can't be presented until they are closed. Instead, we normally keep the layer content alive after a flush, so that it can be presented in a later frame when the layer is finally closed. putImageData however is supposed to write to the canvas bitmap wholesale, bypassing all render states. This means that we can't write to the layer's content because the written pixels would then get filtered when the layer is closed. We can't write to the main canvas either because these pixels would later be overwritten by the layer's result with draw calls that potentially happened before (e.g. in the sequence `beginLayer(); fillRect(); putImageData(); endLayer();`, `fillRect()` would write over `putImageData()`. This behavior is part of the current 2D Canvas Layer spec draft: Explainer: https://github.com/fserb/canvas2D/blob/master/spec/layers.md Spec draft: https://github.com/whatwg/html/pull/9537 Change-Id: I266a3155c32919a68dbbb093e4aff9b1dd13a3b5 Bug: 1484741 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4943172 Reviewed-by: Fernando Serboncini <fserb@chromium.org> Commit-Queue: Jean-Philippe Gravel <jpgravel@chromium.org> Cr-Commit-Position: refs/heads/main@{#1212741}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
The most important sources of information and activity are:
wpt:matrix.org
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Clone or otherwise get https://github.com/web-platform-tests/wpt.
Note: because of the frequent creation and deletion of branches in this repo, it is recommended to “prune” stale branches when fetching updates, i.e. use git pull --prune
(or git fetch -p && git merge
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See the documentation website and in particular the system setup for running tests locally.
The wpt
command provides a frontend to a variety of tools for working with and running web-platform-tests. Some of the most useful commands are:
wpt serve
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- For updating or generating a MANIFEST.json
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or the path to the python binary (if python
is not in your %PATH%
).
python wpt [command]
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git checkout -b topic
../wpt lint
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