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[Impeller] Turned on wide gamut support by default. (#39801) #41965
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After having run a memory audit on Flutter Gallery I believe we can turn on wide gamut support by default for impeller. Here are the ramifications of this change: 1) If an opaque surface is used and no transparent wide gamut images are used, there should be no change in performance or memory usage. 1) If a transparent surface is used; the surface will take up 2x memory (ex 4MB on iPhone 7) and will have a runtime performance cost. 1) If wide gamut **transparent** images are used, they will take up 2x memory. Opaque wide-gamut images will take up the same amount of memory. ## Flutter gallery test results ### Test 1 Steps: * Tap "Material" * Scroll down and back to "Cards" * Tap "Cards" * Scroll to bottom of "Cards" example Notice that the card images are wide gamut, AdobeRGB. **Memory increase:** 10.401 MB (+8.7%) ### Test 2 Steps: * Just launch the gallery Notice that there shouldn't be any wide gamut images. **Memory Increase:** 1.22 MB (+1%, this is probably a fluke of measurement) ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt. See [testing the engine] for instructions on writing and running engine tests. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I signed the [CLA]. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/wiki/Tree-hygiene#overview [Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style [testing the engine]: https://github.com/flutter/flutter/wiki/Testing-the-engine [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/wiki/Chat
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!). If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix? Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. |
zanderso
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…127041) flutter/engine@400a26a...47fd496 2023-05-17 [email protected] Re-Enable Vulnerability 3p Scanning Workflow (flutter/engine#42049) 2023-05-17 [email protected] Roll Skia from c3473c32bb35 to ffa425bacfc4 (14 revisions) (flutter/engine#42095) 2023-05-17 [email protected] [Impeller] Turned on wide gamut support by default. (#39801) (flutter/engine#41965) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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…lutter#127041) flutter/engine@400a26a...47fd496 2023-05-17 [email protected] Re-Enable Vulnerability 3p Scanning Workflow (flutter/engine#42049) 2023-05-17 [email protected] Roll Skia from c3473c32bb35 to ffa425bacfc4 (14 revisions) (flutter/engine#42095) 2023-05-17 [email protected] [Impeller] Turned on wide gamut support by default. (flutter#39801) (flutter/engine#41965) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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relands #39801
forward fix for internal customers at cl/531288297
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.